Autosomal dominant cerebellar ataxia type III: a review of the phenotypic and genotypic characteristics
© Fujioka et al.; licensee BioMed Central Ltd. 2013
Received: 14 May 2012
Accepted: 16 January 2013
Published: 18 January 2013
Autosomal Dominant Cerebellar Ataxia (ADCA) Type III is a type of spinocerebellar ataxia (SCA) classically characterized by pure cerebellar ataxia and occasionally by non-cerebellar signs such as pyramidal signs, ophthalmoplegia, and tremor. The onset of symptoms typically occurs in adulthood; however, a minority of patients develop clinical features in adolescence. The incidence of ADCA Type III is unknown. ADCA Type III consists of six subtypes, SCA5, SCA6, SCA11, SCA26, SCA30, and SCA31. The subtype SCA6 is the most common. These subtypes are associated with four causative genes and two loci. The severity of symptoms and age of onset can vary between each SCA subtype and even between families with the same subtype. SCA5 and SCA11 are caused by specific gene mutations such as missense, inframe deletions, and frameshift insertions or deletions. SCA6 is caused by trinucleotide CAG repeat expansions encoding large uninterrupted glutamine tracts. SCA31 is caused by repeat expansions that fall outside of the protein-coding region of the disease gene. Currently, there are no specific gene mutations associated with SCA26 or SCA30, though there is a confirmed locus for each subtype. This disease is mainly diagnosed via genetic testing; however, differential diagnoses include pure cerebellar ataxia and non-cerebellar features in addition to ataxia. Although not fatal, ADCA Type III may cause dysphagia and falls, which reduce the quality of life of the patients and may in turn shorten the lifespan. The therapy for ADCA Type III is supportive and includes occupational and speech modalities. There is no cure for ADCA Type III, but a number of recent studies have highlighted novel therapies, which bring hope for future curative treatments.
KeywordsSCA5 SCA6 SCA11 SCA26 SCA30 SCA31 SPTBN2 CACNA1A TTBK2 BEAN
Autosomal dominant cerebellar ataxias, spinocerebellar ataxias.
Genes and genetic loci associated with ADCA types
ADCA Type I
ADCA Type II
ADCA Type III
Inframe deletion, missense
Stop, frameshift insertion, frameshift deletion
This review focuses on ADCA Type III. ADCA Type III currently is comprised of a group of six disorders.
ADCA Type III, as a group, is a relatively benign and slowly progressing set of disorders. It is clinically characterized by mostly pure cerebellar signs including gait, stance, and limb ataxia as well as dysarthria. Affected subjects present with cerebellar oculomotor dysfunction, such as nystagmus and impaired smooth pursuit. The characteristics of oculomotor dysfunctions may vary between each subtype. Non-cerebellar signs including pyramidal features, peripheral neuropathy, involuntary movements, and others, are occasionally seen in ADCA Type III. We discuss the clinical phenotype of each subtype below.
The prevalence of ADCA Type III is unknown; however, studies have estimated that the incidence may be variable based upon geographical location/population. There were estimated to be three ADCA cases per 100,000 people in the Netherlands , and 4.2 ADCA cases per 100,000 people in Norway .
Epidemiological findings of ADCA Type III
Reported frequency of each ADCA subform
Relatively common (5-20%)
Rare (0<, <5%)
USA, German, France
USA, German, France
Japan, Netherland, Korea, German
USA, Taiwan, Australia
UK, India, China, Thailand, Italy, France, Finland, Spain, South Africa
England, German, France
Molecular genetics and etiology
The pathogenesis of the ADCA Type III is not fully understood. There are currently four causative genes, which have been identified to have an association with ADCA Type III. Conventional mutations in the spectrin, beta, non-erythrocytic 2 (SPTBN2) gene for SCA5, polyglutamine expansion in the calcium channel, voltage-dependent, P/Q type, alpha 1A subunit (CACNA1A) gene for SCA6, conventional mutations in the tau tubulin kinase-2 (TTBK2) gene for SCA11, and non-coding expansions in the brain expressed, associated with NEDD4 (BEAN) gene for SCA31. These can all cause ADCA Type III. In addition, two loci have been discovered for the other subforms, SCA26 and SCA30. We will discuss the molecular genetics and etiology of each subform later in the text.
Diagnosis and differential diagnosis
Management including treatment
There is currently no cure for ADCA Type III or its subtypes. Supportive care still remains the mainstay of management; however, a variety of different kinds of treatments are emerging.
It is important for patients with ADCA Type III to be involved in physical and occupational therapies from the onset of their gait dysfunction or dysarthria. Computer devices are useful for communication in subjects with severe dysarthria. Mechanical aids such as a cane, walker, or wheelchair can allow the patient to remain both mobile and safe.
Several clinical trials have been conducted for potential SCA6 therapies. Yabe and colleagues showed that acetazolamide (250-500 mg/day) temporally, but significantly, reduced the severity of ataxia in SCA6 patients . A pilot trial revealed that gabapentin (1200 mg/day) alleviated some of the ataxia symptoms in SCA6 . An open-label trial with tandospirone (15 mg/day) for SCA6 patients showed a reduction in the total score on the ataxia rating scale and total length traveled by SCA6 patients . In this study, the length travelled was defined as the movement in distance per minute (m/s) of the patient’s center of gravity as calculated by the software incorporated in the stabilometer (Gravicorder, Model G5500; Anima Corp, Tokyo, Japan).
RNA interference (RNAi) aimed at post-transcriptional silencing of disease causing a selective degradation of mRNA, has attracted interest as a new emerging therapeutic option . This novel therapy has already been applied to some neurodegenerative conditions including polyglutamine diseases. Xia and colleagues described that intracerebellar injection of RNAi successfully led to improvement of motor coordination in the mouse models of SCA1 . They also found that it restored cerebellar morphology and resolved characteristic inclusions in the Purkinje cells of the mouse model. Scholefield and colleagues showed that selective silencing of mutant Ataxin 7 caused significant reduction in the levels of the toxic mutant Ataxin 7 in cells . Recently, pioneering work has been conducted that may lead to the development of potential RNAi therapies for one of the subtypes, SCA6. Tsou and colleagues developed a novel splice isoform-specific-RNAi strategy that selectively targets the polyQ-encoding Cav2.1 splice valiant . They achieved the selective suppression of the polyQ-encoding Cav2.1 splice variants utilizing a new artificial microRNA-like delivery system. So far, an increasing number of reports, including these studies, have been published associated with RNAi therapies. However, numerous problems such as selection of potent siRNAs, the safety and efficacy of these compounds, and the eventually drug delivery to tissues or cells, remain to be elucidated before they can become clinically available .
Stem cell therapy
The beneficial effects of routine exercise have been reported not only for metabolic diseases, but also neurodegenerative disorders such as Alzheimer’s disease [45, 46] and Parkinson’s disease . Fryer and colleagues have shown that exercise can improve motor impairment, as well as learning and memory deficits in the ATXN-1 mouse model . Ilg and colleagues reported that intensive coordinative training significantly improved motor performance and alleviated symptoms in patients with cerebellar degeneration, including SCA6 subjects [49, 50]. However, it is still unclear whether excise has an influence on the origin of the disease directly or if it is simply supportive care.
As a group ADCA Type III, progresses slowly and are not life-threatening. However, there is possible intra or inter familial variability. Having dysphagia or frequent falls may shorten the lifespan of the patient.
Clinical description, Molecular genetics, and etiology of each subform
Spinocerebellar Ataxia Type 5 (SCA5)
Three families, American, German, and French have been reported [54–56]. SCA5 has age related penetrance. The age of symptomatic disease onset is between 10 and 68 years (mean 33 years) without anticipation . This slowly progressive type of ADCA can have a disease duration of more than 30 years. SCA5 presents with cerebellar signs and eye movement abnormalities, including down beat nystagmus, gaze-evoked nystagmus, and impaired smooth pursuit. Several patients manifested non-cerebellar signs such as facial myokimia, horizontal gaze palsy, intention or resting tremor, brisk deep tendon reflexes, and impaired vibration sense [56, 57]. Head MRI shows global atrophy of the cerebellum without any involvement of brainstem or any other brain regions .
In 1994, Ranum and colleagues mapped the locus on chromosome 11 by linkage analysis in a large American family affected by dominant ataxia . In 2004, Bürk and colleagues narrowed the SCA5 locus to a 5.15-Mb interval on chromosome 11q13 . In 2006, Ikeda and colleagues discovered the SPTBN2 mutations, encoding β-III spectrin, in the original American kindred and two additional kindreds . To date, two in-frame deletions and one missense mutation have been confirmed as pathogenic mutations . β-III spectrin consists of 2390 amino acid proteins and is predominantly expressed in Purkinje cells [59, 60] and stabilizes the glutamate transporter, excitatory amino acid transporter (EAAT4), at the plasma membrane . SPTBN2 mutations were found to cause impaired axonal transport in Drosophila . In addition, the loss of β-III spectrin reduced the spontaneous firing rate in surviving Purkinje cells and deregulated the glutamatergic neurotransmission in mice . Clarkson and colleagues found that a β-III spectrin L253P mutation interferes with binding to Arp1, a subunit of the dynactin-dynein complex, and disrupts protein trafficking of both β-III spectrin and EAAT4 from the Golgi . However, the precise mechanism of β-III spectrin function has yet to be elucidated.
Spinocerebellar Ataxia Type 6 (SCA6)
SCA6 is the most common subtype in ADCA type III and the second most common subtype in all types of ADCA, including ADCA Type I, ADCA Type II, and ADCA Type III. Incidence of SCA6 varies in the worldwide population. SCA6 is a late-onset and slowly progressive form of ataxia . Some affected individuals can walk without any assistance more than 20 years after disease onset [55, 64, 65]. A prospective natural history study using affected SCA6 patients as well as patients from the three other subtypes of ADCA Type I, including SCA1, SCA2, and SCA3 conducted by European Integrated Project on Spinocerebellar Ataxias revealed that the disease progression was slowest in SCA6 : increased SARA score  was 0.35±0.3 for one year. The age of symptomatic disease onset is between 16 and 72 years (mean age: 45 years). Approximately 60% of patients develop disease after age 50 years . Penetrance is almost 100% . Anticipation has not been observed . Disease duration can be more than 25 years. SCA6 is mainly characterized by cerebellar signs as well as eye movement problems, such as gaze-evoked nystagmus, downbeat nystagmus, impaired vestiblo-ocular reflex, and impaired smooth pursuit. The majority of SCA6 patients develop gait ataxia as an initial symptom. Some patients manifest episodic vertigo, diplopia, and dysarthria prior to gait abnormalities . SCA6 occasionally presents with extracerebellar symptoms, such as pyramidal tract signs  and peripheral neuropathy . Occasionally, cognitive impairment , parkinsonism characterized by bradykinesia , myoclonus, dystonia, tremor including postural, action, and terminal tremor of heads, or other movement disorders may be seen . In addition, depression  and fatigue  may be associated with SCA6. Head MRI reveals severe cerebellar atrophy accompanied by mild atrophy of the middle cerebellar peduncle, pons, and red nucleus [76, 77]. Single-photon emission computed tomography using N-isopropyl-p123I]iodoamphetamine shows decreased tracer uptake in the cerebellum . Positron emission tomography studies with 18F]Fluorodeoxyglucose reveal that the glucose metabolism rate was reduced not only in cerebellum and brainstem, but also in cortical regions and basal ganglia .
In 1997, Zhuchenko and colleagues identified small expansions of the trinucleotide (CAG)n repeat in the CACNA1A gene on chromosome 19p13, that encoded the α1 subunit of a P/Q-type voltage-gated calcium channel. Expanded alleles usually have 20 to 29 CAG repeats [8, 69, 80], whereas the normal alleles have 4 to 18 repeats . Mariotti and colleagues described that affected subjects who were homozygous for an intermediate allele of 19 CAG repeats in the CACNA1A gene . CACNA1A exists in granule cells and Purkinje cells of the cerebellar cortex. The central role of CACNA1A is thought to be in synaptic transmission. It is assumed that polyglutamine repeats in CACNA1A effects Ca2+ channel to reduce Ca2+ influx, leading to eventually cell death . The polyglutamine repeats in SCA6 are much smaller than in others harboring polyglutamine expansion SCAs . It has yet to be determined whether such small expansions can cause pathological effects in normal CACNA1A function by altering the calcium channel function or if it acquires a new toxic function [84, 85].
Spinocerebellar Ataxia Type 11 (SCA11)
SCA11 is another rare subtype of ataxia. To date, four families, a British family from Devon, UK, a British family of Pakistani ancestry, a German family, and a French family, have been reported [86–88]. In two additional studies, SCA11 was not observed in 68 unrelated Han Chinese patients  or 48 unrelated familial cases of German descent . SCA11 presents with early-onset, and slowly progressing cerebellar symptoms. The age of symptomatic disease onset is between 11 and 70 years (mean: 25 years). This disease may have full penetrance . Disease duration is over 20 years and some cases remain ambulant for up to 16 years after onset . SCA11 is clinically characterized by cerebellar signs and eye movement abnormalities, which include jerky pursuit, ophthalmoplegia, and horizontal and vertical nystagmus. Occasionally, affected patients manifest mild to moderate hyperreflexia, especially in lower limbs but with negative Babinski signs . Peripheral neuropathy and dystonia may also be seen . Head MRI shows isolated marked cerebellar atrophy [86, 87].
In 1999, Worth and colleague mapped the locus on chromosome 15q14-21 in two British families with the ADCA phenotype . In 2007, Houlden and colleagues identified two TTBK2 mutations, one is a 1-base insertion of an adenosine in exon 13 at nucleotide 1329, codon 44; another is a frameshift deletion of a 2-base guanine and adenosine in exon 13. TTBK2 mRNA is expressed in all brain regions, especially in Purkinje cells, granular cell layer, hippocampus, midbrain, and the substantia nigra . TTBK2 phosphorylates the tau protein and stabilizes Purkinje cells . Mutant TTBK2 interrupts normal phosphorylation of tau protein and eventually causes tau deposition, particularly in Purkinje cells.
Spinocerebellar Ataxia Type 26 (SCA26)
SCA26 is very rare subtype. Only one American family of Norwegian descent has been reported. This family has 23 affected family members and 14 at-risk members . The age of symptomatic disease onset is between 26 and 60 years (mean of 42 years) without anticipation. Disease duration is still unknown. SCA26 presents with relatively late-onset, slowly progressive cerebellar symptoms and eye movement abnormalities. Eye movement abnormalities are characterized by impaired pursuit and nystagmus. Only one patient presented with left-sided hyperreflexia with positive Babinski sign. Head MRI showed isolated cerebellar atrophy.
In 2005, Yu and colleagues mapped a 15.55-cM locus on chromosome 19p.33.3 by a genome-wide linkage analysis of a large American family with the ADCA phenotype . This locus is closed to CACNA1A, the causative gene for SCA6; however, CACNA1A is also about 19-cM centromeric to locus of SCA26. The responsible gene for SCA26 is still unknown.
Spinocerebellar Ataxia Type 30 (SCA30)
SCA30 is very rare subtype and only one Australian family with six affected subjects has been reported to date . The age of symptomatic disease onset is between 45 and 76 years (mean 52 years). SCA30 is clinically characterized by relatively pure and slowly progressive cerebellar ataxia. Several affected subjects had mild hyperreflexia in their lower limbs. One case presented with gaze-evoked nystagmus. Another affected patient also had dystonia. Of note, several deceased family members may have had parkinsonism according to family histories; although, the details of their clinical features were unavailable. Head MRI showed isolated atrophy of cerebellum, predominantly superior and dorsal cerebellar vermis.
In 2009, Storey and colleagues mapped a 5-Mb locus on chromosome 4q34.3-q35.1 by a genome-wide linkage analysis of an Australian family with the ADCA phenotype . The causative genetic mutation has yet to be discovered.
Spinocerebellar Ataxia Type 31 (SCA31)
SCA31 is rare subtype of ADCA type III except in Japan, where it is the fourth most common form of ADCA[33, 93, 94]. More than 20 families have been reported from Japan to date [93, 95, 96]. SCA31 presents with a late-onset progressive form of ataxia. The age of symptomatic disease onset is between 8 and 83 years with mean of about 58 years. The disease duration is more than 10 years . The phenomenon of anticipation is absent or probably mild . This disease is believed to have incomplete penetrance. . SCA31 is clinically characterized by cerebral ataxia and eye movement abnormalities, such as horizontal gaze nystagmus and impaired pursuit. Occasionally, affected subjects manifest pyramidal signs , hearing difficulties [93, 96], and decreased vibration . Occasionally, tremor  may be seen. Head MRI showed global atrophy of the cerebellum, but in a few cases cerebral atrophy was also present .
In 2000, Nagaoka and colleagues mapped a locus to chromosome 16q  by a genome-wide linkage analysis of six Japanese families . In 2004, Hirano and colleagues refined the candidate locus to a 1.25-Mb interval on chromosome 16q22.1 . This locus is also the candidate interval of SCA4, though the clinical phenotypes differ from each other. Ishikawa and colleagues identified a single-nucleotide change in the PLEKHG4 gene in 109 affected patients and in 48 at-risk individuals from 52 families ; however, other studies failed to detect this change in 16p22.1-linked ADCA patients [99, 100]. In 2009, Sato and colleagues discovered 2.5 to 3.8 kb insertions of penta-nucleotide repeats, (TGGAA)n, (TACAA)n, and (TAAAA)n, on chromosome 16q21-q22 using southern blot analysis and sequencing analysis in 160 affected individuals from 98 families . Among these repeats, (TGGAA)n is thought to be pathogenic in Japanese subjects. In the study of the European population, all expansions had pure stretches of (TACAA)n, (GAAAA)n or (TACAA)n in their expanded alleles, without any expansion identified in Japanese series . This repeat exists in an intronic region shared by two genes, BEAN and TK2. This insertion was not observed in control subjects or in individuals with SCA4. The length of the insertion is inversely correlated with the age at symptomatic disease onset; therefore, the length of inserted TGGAA repeat seems to be associated with the toxicity.
Clinical features of ADCA Type III
N. of Pt
Occasional (10<, <50%)
A, D, nystagmus#
IVOR, ISP, ophthalmoplegia, SS, PTS, CI, myoclonus, dystonia, tremor, rigidity, EA
Pancerebellar, pons, cerebellar peduncle, red nucleus
N. of Pt
A, D, IVOR, GEN
DBN, hyperreflexia, resting tremor, intension tremor, facial myokimia, ophthalmoplegia, tremor, DVS
A, D, ISP, nystagmus, hyperreflexia
ISP, DVS, GEN, IVOR
A, D, ISP
A, D, hyperreflexia
A,D, nystagmus, GEN
DVS, Hyperreflexia, spasticity, hearing difficulty, hyporeflexia, tremor
In our review, we describe the clinical, genetic, molecular, and phenotypic aspects of ADCA Type III. There has been remarkable progress in the understanding of the genetic and molecular mechanisms associated with ADCA. Additionally, genetic testing for this disease is becoming less costly and more widely available due to the technological advancements of genetic sequencing. However, the Harding classification is still very important, because collecting the essential clinical phenotype and selecting the most appropriate genetic tests are crucial for the diagnosis of cerebellar ataxias. To remain cost effective, this requires efficient clinical disease classification, such as Harding’s, and well-organized diagnostic criteria that narrow the diagnostic possibilities.
ADCA Type III is a rare group of neurodegenerative disorders with the exception of SCA6. The clinical phenotype, pathological characteristics, and biomarkers associated with ADCA Type III are still not well understood. Moving forward, the greatest challenges for future research are the identification of families with ADCA Type III phenotype without known mutations, identification of causative genes and pathogenesis, and the development of specific treatments. Hopefully, such efforts will eventually lead to the identification of curative treatments for ADCA Type III.
SF is a research fellow in the Department of Neurology at the Mayo Clinic in Jacksonville, Florida. He received a medical degree from Fukuoka University, Fukuoka, Japan. He completed his internship at Fukuoka University and moved to Tokyo where he completed his neurology residency training at Tokyo Rosai Hospital, Tokyo, Japan. After passing the Japanese Neurology Board Certification, SF moved to Mayo Clinic Florida in 2010, where he started his clinical research. His research interests include neurodegenerative disorders, clinical genetics and pathology. SF has received fellowship to attend the Aspen Course of Movement Disorder in 2011. SF is a member of American Academy of Neurology, Japanese Society of Neurology, the Japanese Society of Internal Medicine and the Japanese Stroke Society.
CS is a research fellow from the Institute of Neuroscience and Physiology, Department of Clinical Neuroscience and Rehabilitation, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden. She received a medical degree from University of Bergen, Norway. She completed her neurology residency training at Sahlgrenska University Hospital, Gothenburg, Sweden. CS completed a one year rotationtraining as a neurology fellow at Mayo Clinic in Jacksonville, Florida in 2011. Her research interests focus on neurodegenerative disorders,brain white matter disorders clinical genetics and biomarkers. CS has received fellowship to attend the Aspen Course of Movement Disorders in 2011 and a travel award for the annual meeting of American Neurological Association in 2011. CS is a member of American Academy of Neurology, the Swedish Neurological Society, the Swedish Medical Association, the Norwegian Medical Association, and the Swedish Epilepsy Society.
ZKW is a professor and consultant in the Department of Neurology at the Mayo Clinic in Jacksonville, Florida. He received a medical degree from Silesian Medical University, Katowice, Poland. ZKW also finished an internship in Internal Medicine and completed his residency in Neurology at the University of Nebraska Medical Center, Omaha, NE, USA. He is a neurologist with more than 30 years of clinical experience. His research interests focus on neurodegenerative disorders as well as, clinical genetics, biomarkers, and therapeutic approaches. Based on the kindred studies that ZKW has conducted for more than 25 years, several important genetic discoveries have been made. These include the discovery of MAPT, LRRK2, DCTN1, VPS35, EIF4G1, C9ORF72, CSF1R and CIZ1 genes, among others. ZKW has directed a the clinical core for the NIH/NINDS Morris K. Udall Center of Excellence for PD Research grant awarded to the Mayo Clinic Florida since 1999 to present. ZKW has received Annemarie Opprecht-Foundation award from Switzerland in 2005 Parkinson Society Canada’s Donald Calne Lecturship Award, an honorary membership of the Polish Neurological Society, the 2009 Distinguished Mayo Investigator Award for the Mayo Clinic Florida, the John A. Beals Awardof the Duval County Medical Society, and the Fifth Annual Robert W. Hervey Distinguished Lecture on Parkinson’s Disease Award: Methodist Neurological Institute of,Houston, Texas. ZKW is a member of American Neurological Association, American Academy of Neurology, International association of Parkinsonism and Related Disorders, the Movement Disorder Society, American Clinical Neurophysiology Society, American Association of Electrodiagnostic Medicine, Mayo Alumni Association, Parkinson Study Group, and Duval County Medical Society. ZKW has served as an editor-in-chief or associated editor on three neurological journals, Parkinsonism and Related Disorders, European Journal of Neurology, and Polish edition of Neurology.
Autosomal Dominant Cerebellar Ataxia
Brain Expressed, Associated With Nedd4
Calcium Channel, Voltage-Dependent, P/Q Type, Alpha 1A Subunit
Excitatory Amino Acid Transporter
Magnetic Resonance Imaging
Pleckstrin Homology Domain-Containing Protein, Family G, Member 4
small interfering RNA
Spectrin, Beta, Non-Erythrocytic 2
United States of America
Thymidine Kinase 2
Tau Tubulin Kinase-2.
CS was partially supported by the American Scandinavian Foundation: Haakon Styri Fund. ZKW was partially supported by Mayo Clinic Florida (MCF) Research Committee CR program [MCF #90052030], National Institute of Health/National Institute of Neurological Disorders and Stroke [P50-NS072187-01S2], National Institute of Health/National Institute of Neurological Disorders and Stroke [1RC2-NS070276, R01-NS057567], and the Dystonia Medical Research Foundation.
We would like to thank Kelly E. Viola of the Mayo Clinic in Jacksonville, Florida for providing editorial assistance for this manuscript.
- Harding AE: Classification of the hereditary ataxias and paraplegias. Lancet. 1983, 1: 1151-1155.PubMedGoogle Scholar
- Whaley NR, Fujioka S, Wszolek ZK: Autosomal dominant cerebellar ataxia type I: a review of the phenotypic and genotypic characteristics. Orphanet J Rare Dis. 2011, 6: 33-10.1186/1750-1172-6-33.PubMed CentralPubMedGoogle Scholar
- van de Warrenburg BP, Notermans NC, Schelhaas HJ, van Alfen N, Sinke RJ, Knoers NV, Zwarts MJ, Kremer BP: Peripheral nerve involvement in spinocerebellar ataxias. Arch Neurol. 2004, 61: 257-261. 10.1001/archneur.61.2.257.PubMedGoogle Scholar
- Erichsen AK, Koht J, Stray-Pedersen A, Abdelnoor M, Tallaksen CM: Prevalence of hereditary ataxia and spastic paraplegia in southeast norway: a population-based study. Brain. 2009, 132: 1577-1588. 10.1093/brain/awp056.PubMedGoogle Scholar
- Schols L, Bauer P, Schmidt T, Schulte T, Riess O: Autosomal dominant cerebellar ataxias: clinical features, genetics, and pathogenesis. Lancet Neurol. 2004, 3: 291-304. 10.1016/S1474-4422(04)00737-9.PubMedGoogle Scholar
- Maruyama H, Izumi Y, Morino H, Oda M, Toji H, Nakamura S, Kawakami H: Difference in disease-free survival curve and regional distribution according to subtype of spinocerebellar ataxia: a study of 1,286 japanese patients. Am J Med Genet. 2002, 114: 578-583. 10.1002/ajmg.10514.PubMedGoogle Scholar
- Takano H, Cancel G, Ikeuchi T, Lorenzetti D, Mawad R, Stevanin G, Didierjean O, Durr A, Oyake M, Shimohata T, et al: Close associations between prevalences of dominantly inherited spinocerebellar ataxias with CAG-repeat expansions and frequencies of large normal CAG alleles in japanese and caucasian populations. Am J Hum Genet. 1998, 63: 1060-1066. 10.1086/302067.PubMed CentralPubMedGoogle Scholar
- Matsumura R, Futamura N, Fujimoto Y, Yanagimoto S, Horikawa H, Suzumura A, Takayanagi T: Spinocerebellar ataxia type 6. Molecular and clinical features of 35 Japanese patients including one homozygous for the CAG repeat expansion. Neurology. 1997, 49: 1238-1243. 10.1212/WNL.49.5.1238.PubMedGoogle Scholar
- Matsuyama Z, Kawakami H, Maruyama H, Izumi Y, Komure O, Udaka F, Kameyama M, Nishio T, Kuroda Y, Nishimura M, Nakamura S: Molecular features of the CAG repeats of spinocerebellar ataxia 6 (SCA6). Hum Mol Genet. 1997, 6: 1283-1287. 10.1093/hmg/6.8.1283.PubMedGoogle Scholar
- Watanabe H, Tanaka F, Matsumoto M, Doyu M, Ando T, Mitsuma T, Sobue G: Frequency analysis of autosomal dominant cerebellar ataxias in japanese patients and clinical characterization of spinocerebellar ataxia type 6. Clin Genet. 1998, 53: 13-19. 10.1034/j.1399-0004.1998.531530104.x.PubMedGoogle Scholar
- Mori M, Adachi Y, Kusumi M, Nakashima K: A genetic epidemiological study of spinocerebellar ataxias in Tottori prefecture Japan. Neuroepidemiology. 2001, 20: 144-149. 10.1159/000054775.PubMedGoogle Scholar
- Kim HJ, Jeon BS, Lee WY, Chung SJ, Yong SW, Kang JH, Lee SH, Park KW, Park MY, Kim BC, et al: SCA in korea and its regional distribution: a multicenter analysis. Parkinsonism Relat Disord. 2011, 17: 72-75. 10.1016/j.parkreldis.2010.09.006.PubMedGoogle Scholar
- Bang OY, Huh K, Lee PH, Kim HJ: Clinical and neuroradiological features of patients with spinocerebellar ataxias from korean kindreds. Arch Neurol. 2003, 60: 1566-1574. 10.1001/archneur.60.11.1566.PubMedGoogle Scholar
- van de Warrenburg BP, Sinke RJ, Verschuuren-Bemelmans CC, Scheffer H, Brunt ER, Ippel PF, Maat-Kievit JA, Dooijes D, Notermans NC, Lindhout D, et al: Spinocerebellar ataxias in the netherlands: prevalence and age at onset variance analysis. Neurology. 2002, 58: 702-708. 10.1212/WNL.58.5.702.PubMedGoogle Scholar
- Sinke RJ, Ippel EF, Diepstraten CM, Beemer FA, Wokke JH, van Hilten BJ, Knoers NV, van Amstel HK, Kremer HP: Clinical and molecular correlations in spinocerebellar ataxia type 6: a study of 24 dutch families. Arch Neurol. 2001, 58: 1839-1844. 10.1001/archneur.58.11.1839.PubMedGoogle Scholar
- Schols L, Amoiridis G, Buttner T, Przuntek H, Epplen JT, Riess O: Autosomal dominant cerebellar ataxia: phenotypic differences in genetically defined subtypes?. Ann Neurol. 1997, 42: 924-932. 10.1002/ana.410420615.PubMedGoogle Scholar
- Schols L, Kruger R, Amoiridis G, Przuntek H, Epplen JT, Riess O: Spinocerebellar ataxia type 6: genotype and phenotype in german kindreds. J Neurol Neurosurg Psychiatry. 1998, 64: 67-73. 10.1136/jnnp.64.1.67.PubMed CentralPubMedGoogle Scholar
- Riess O, Schols L, Bottger H, Nolte D, Vieira-Saecker AM, Schimming C, Kreuz F, Macek M, Krebsova A, Macek MS, et al: SCA6 Is caused by moderate CAG expansion in the alpha1A-voltage-dependent calcium channel gene. Hum Mol Genet. 1997, 6: 1289-1293. 10.1093/hmg/6.8.1289.PubMedGoogle Scholar
- Leggo J, Dalton A, Morrison PJ, Dodge A, Connarty M, Kotze MJ, Rubinsztein DC: Analysis of spinocerebellar ataxia types 1, 2, 3, and 6, dentatorubral-pallidoluysian atrophy, and Friedreich's ataxia genes in spinocerebellar ataxia patients in the UK. J Med Genet. 1997, 34: 982-985. 10.1136/jmg.34.12.982.PubMed CentralPubMedGoogle Scholar
- Basu P, Chattopadhyay B, Gangopadhaya PK, Mukherjee SC, Sinha KK, Das SK, Roychoudhury S, Majumder PP, Bhattacharyya NP: Analysis of CAG repeats in SCA1, SCA2, SCA3, SCA6, SCA7 and DRPLA loci in spinocerebellar ataxia patients and distribution of CAG repeats at the SCA1, SCA2 and SCA6 loci in nine ethnic populations of eastern india. Hum Genet. 2000, 106: 597-604. 10.1007/s004390050031.PubMedGoogle Scholar
- Sinha KK, Worth PF, Jha DK, Sinha S, Stinton VJ, Davis MB, Wood NW, Sweeney MG, Bhatia KP: Autosomal dominant cerebellar ataxia: SCA2 is the most frequent mutation in eastern india. J Neurol Neurosurg Psychiatry. 2004, 75: 448-452. 10.1136/jnnp.2002.004895.PubMed CentralPubMedGoogle Scholar
- Jiang H, Tang B, Xia K, Zhou Y, Xu B, Zhao G, Li H, Shen L, Pan Q, Cai F: Spinocerebellar ataxia type 6 in mainland china: molecular and clinical features in four families. J Neurol Sci. 2005, 236: 25-29. 10.1016/j.jns.2005.04.009.PubMedGoogle Scholar
- Tang B, Liu C, Shen L, Dai H, Pan Q, Jing L, Ouyang S, Xia J: Frequency of SCA1, SCA2, SCA3/MJD, SCA6, SCA7, and DRPLA CAG trinucleotide repeat expansion in patients with hereditary spinocerebellar ataxia from chinese kindreds. Arch Neurol. 2000, 57: 540-544. 10.1001/archneur.57.4.540.PubMedGoogle Scholar
- Bryer A, Krause A, Bill P, Davids V, Bryant D, Butler J, Heckmann J, Ramesar R, Greenberg J: The hereditary adult-onset ataxias in south africa. J Neurol Sci. 2003, 216: 47-54. 10.1016/S0022-510X(03)00209-0.PubMedGoogle Scholar
- Sura T, Eu-Ahsunthornwattana J, Youngcharoen S, Busabaratana M, Dejsuphong D, Trachoo O, Theerasasawat S, Tunteeratum A, Noparutchanodom C, Tunlayadechanont S: Frequencies of spinocerebellar ataxia subtypes in thailand: window to the population history?. J Hum Genet. 2009, 54: 284-288. 10.1038/jhg.2009.27.PubMedGoogle Scholar
- Brusco A, Gellera C, Cagnoli C, Saluto A, Castucci A, Michielotto C, Fetoni V, Mariotti C, Migone N, Di Donato S, Taroni F: Molecular genetics of hereditary spinocerebellar ataxia: mutation analysis of spinocerebellar ataxia genes and CAG/CTG repeat expansion detection in 225 italian families. Arch Neurol. 2004, 61: 727-733. 10.1001/archneur.61.5.727.PubMedGoogle Scholar
- Filla A, Mariotti C, Caruso G, Coppola G, Cocozza S, Castaldo I, Calabrese O, Salvatore E, De Michele G, Riggio MC, et al: Relative frequencies of CAG expansions in spinocerebellar ataxia and dentatorubropallidoluysian atrophy in 116 italian families. Eur Neurol. 2000, 44: 31-36. 10.1159/000008189.PubMedGoogle Scholar
- Stevanin G, Lebre AS, Mathieux C, Cancel G, Abbas N, Didierjean O, Durr A, Trottier Y, Agid Y, Brice A: Linkage disequilibrium between the spinocerebellar ataxia 3/machado-joseph disease mutation and two intragenic polymorphisms, one of which, X359Y, affects the stop codon. Am J Hum Genet. 1997, 60: 1548-1552. 10.1016/S0002-9297(07)64251-7.PubMed CentralPubMedGoogle Scholar
- Juvonen V, Hietala M, Kairisto V, Savontaus ML: The occurrence of dominant spinocerebellar ataxias among 251 finnish ataxia patients and the role of predisposing large normal alleles in a genetically isolated population. Acta Neurol Scand. 2005, 111: 154-162. 10.1111/j.1600-0404.2005.00349.x.PubMedGoogle Scholar
- Pujana MA, Corral J, Gratacos M, Combarros O, Berciano J, Genis D, Banchs I, Estivill X, Volpini V: Spinocerebellar ataxias in Spanish patients: genetic analysis of familial and sporadic cases. The ataxia study group. Hum Genet. 1999, 104: 516-522. 10.1007/s004390050997.PubMedGoogle Scholar
- Silveira I, Miranda C, Guimaraes L, Moreira MC, Alonso I, Mendonca P, Ferro A, Pinto-Basto J, Coelho J, Ferreirinha F, et al: Trinucleotide repeats in 202 families with ataxia: a small expanded (CAG)n allele at the SCA17 locus. Arch Neurol. 2002, 59: 623-629. 10.1001/archneur.59.4.623.PubMedGoogle Scholar
- Vale J, Bugalho P, Silveira I, Sequeiros J, Guimaraes J, Coutinho P: Autosomal dominant cerebellar ataxia: frequency analysis and clinical characterization of 45 families from portugal. Eur J Neurol. 2010, 17: 124-128. 10.1111/j.1468-1331.2009.02757.x.PubMedGoogle Scholar
- Basri R, Yabe I, Soma H, Sasaki H: Spectrum and prevalence of autosomal dominant spinocerebellar ataxia in hokkaido, the northern island of japan: a study of 113 japanese families. J Hum Genet. 2007, 52: 848-855. 10.1007/s10038-007-0182-x.PubMedGoogle Scholar
- Yabe I, Sasaki H, Yamashita I, Takei A, Tashiro K: Clinical trial of acetazolamide in SCA6, with assessment using the ataxia rating scale and body stabilometry. Acta Neurol Scand. 2001, 104: 44-47. 10.1034/j.1600-0404.2001.00299.x.PubMedGoogle Scholar
- Nakamura K, Yoshida K, Miyazaki D, Morita H, Ikeda S: Spinocerebellar ataxia type 6 (SCA6): clinical pilot trial with gabapentin. J Neurol Sci. 2009, 278: 107-111. 10.1016/j.jns.2008.12.017.PubMedGoogle Scholar
- Takei A, Hamada S, Homma S, Hamada K, Tashiro K, Hamada T: Difference in the effects of tandospirone on ataxia in various types of spinocerebellar degeneration: an open-label study. Cerebellum. 2010, 9: 567-570. 10.1007/s12311-010-0199-0.PubMedGoogle Scholar
- Mello CC, Conte D: Revealing the world of RNA interference. Nature. 2004, 431: 338-342. 10.1038/nature02872.PubMedGoogle Scholar
- Xia H, Mao Q, Eliason SL, Harper SQ, Martins IH, Orr HT, Paulson HL, Yang L, Kotin RM, Davidson BL: RNAi suppresses polyglutamine-induced neurodegeneration in a model of spinocerebellar ataxia. Nat Med. 2004, 10: 816-820. 10.1038/nm1076.PubMedGoogle Scholar
- Scholefield J, Greenberg LJ, Weinberg MS, Arbuthnot PB, Abdelgany A, Wood MJ: Design of RNAi hairpins for mutation-specific silencing of ataxin-7 and correction of a SCA7 phenotype. PLoS One. 2009, 4: e7232-10.1371/journal.pone.0007232.PubMed CentralPubMedGoogle Scholar
- Tsou WL, Soong BW, Paulson HL, Rodriguez-Lebron E: Splice isoform-specific suppression of the Cav2.1 Variant underlying spinocerebellar ataxia type 6. Neurobiol Dis. 2011, 43: 533-542. 10.1016/j.nbd.2011.04.016.PubMed CentralPubMedGoogle Scholar
- Seyhan AA: RNAi: a potential new class of therapeutic for human genetic disease. Hum Genet. 2011, 130: 583-605. 10.1007/s00439-011-0995-8.PubMedGoogle Scholar
- Jones J, Jaramillo-Merchan J, Bueno C, Pastor D, Viso-Leon M, Martinez S: Mesenchymal stem cells rescue purkinje cells and improve motor functions in a mouse model of cerebellar ataxia. Neurobiol Dis. 2010, 40: 415-423. 10.1016/j.nbd.2010.07.001.PubMedGoogle Scholar
- Chen KA, Cruz PE, Lanuto DJ, Flotte TR, Borchelt DR, Srivastava A, Zhang J, Steindler DA, Zheng T: Cellular fusion for gene delivery to SCA1 affected purkinje neurons. Mol Cell Neurosci. 2011, 47: 61-70. 10.1016/j.mcn.2011.03.003.PubMed CentralPubMedGoogle Scholar
- Edalatmanesh MA, Bahrami AR, Hosseini E, Hosseini M, Khatamsaz S: Neuroprotective effects of mesenchymal stem cell transplantation in animal model of cerebellar degeneration. Neurol Res. 2011, 33: 913-920. 10.1179/1743132811Y.0000000036.PubMedGoogle Scholar
- Lautenschlager NT, Cox KL, Flicker L, Foster JK, van Bockxmeer FM, Xiao J, Greenop KR, Almeida OP: Effect of physical activity on cognitive function in older adults at risk for alzheimer disease: a randomized trial. JAMA. 2008, 300: 1027-1037. 10.1001/jama.300.9.1027.PubMedGoogle Scholar
- Erickson KI, Prakash RS, Voss MW, Chaddock L, Hu L, Morris KS, White SM, Wojcicki TR, McAuley E, Kramer AF: Aerobic fitness is associated with hippocampal volume in elderly humans. Hippocampus. 2009, 19: 1030-1039. 10.1002/hipo.20547.PubMed CentralPubMedGoogle Scholar
- Dibble LE, Addison O, Papa E: The effects of exercise on balance in persons with Parkinson's disease: a systematic review across the disability spectrum. J Neurol Phys Ther. 2009, 33: 14-26.PubMedGoogle Scholar
- Fryer JD, Yu P, Kang H, Mandel-Brehm C, Carter AN, Crespo-Barreto J, Gao Y, Flora A, Shaw C, Orr HT, Zoghbi HY: Exercise and genetic rescue of SCA1 via the transcriptional repressor capicua. Science. 2011, 334: 690-693. 10.1126/science.1212673.PubMed CentralPubMedGoogle Scholar
- Ilg W, Brotz D, Burkard S, Giese MA, Schols L, Synofzik M: Long-term effects of coordinative training in degenerative cerebellar disease. Mov Disord. 2010, 25: 2239-2246. 10.1002/mds.23222.PubMedGoogle Scholar
- Ilg W, Synofzik M, Brotz D, Burkard S, Giese MA, Schols L: Intensive coordinative training improves motor performance in degenerative cerebellar disease. Neurology. 2009, 73: 1823-1830. 10.1212/WNL.0b013e3181c33adf.PubMedGoogle Scholar
- Arpa J, Sanz-Gallego I, Medina-Baez J, Portela LV, Jardim LB, Torres-Aleman I, Saute JA: Subcutaneous insulin-like growth factor-1 treatment in spinocerebellar ataxias: an open label clinical trial. Mov Disord. 2011, 26: 358-359. 10.1002/mds.23423.PubMedGoogle Scholar
- Igarashi S, Koide R, Shimohata T, Yamada M, Hayashi Y, Takano H, Date H, Oyake M, Sato T, Sato A, et al: Suppression of aggregate formation and apoptosis by transglutaminase inhibitors in cells expressing truncated DRPLA protein with an expanded polyglutamine stretch. Nat Genet. 1998, 18: 111-117. 10.1038/ng0298-111.PubMedGoogle Scholar
- Karpuj MV, Becher MW, Springer JE, Chabas D, Youssef S, Pedotti R, Mitchell D, Steinman L: Prolonged survival and decreased abnormal movements in transgenic model of huntington disease, with administration of the transglutaminase inhibitor cystamine. Nat Med. 2002, 8: 143-149. 10.1038/nm0202-143.PubMedGoogle Scholar
- Ranum LP, Schut LJ, Lundgren JK, Orr HT, Livingston DM: Spinocerebellar ataxia type 5 in a family descended from the grandparents of president lincoln maps to chromosome 11. Nat Genet. 1994, 8: 280-284. 10.1038/ng1194-280.PubMedGoogle Scholar
- Stevanin G, Durr A, David G, Didierjean O, Cancel G, Rivaud S, Tourbah A, Warter JM, Agid Y, Brice A: Clinical and molecular features of spinocerebellar ataxia type 6. Neurology. 1997, 49: 1243-1246. 10.1212/WNL.49.5.1243.PubMedGoogle Scholar
- Burk K, Zuhlke C, Konig IR, Ziegler A, Schwinger E, Globas C, Dichgans J, Hellenbroich Y: Spinocerebellar ataxia type 5: clinical and molecular genetic features of a german kindred. Neurology. 2004, 62: 327-329. 10.1212/01.WNL.0000103293.63340.C1.PubMedGoogle Scholar
- Stevanin G, Herman A, Brice A, Durr A: Clinical and MRI findings in spinocerebellar ataxia type 5. Neurology. 1999, 53: 1355-1357. 10.1212/WNL.53.6.1355.PubMedGoogle Scholar
- Ikeda Y, Dick KA, Weatherspoon MR, Gincel D, Armbrust KR, Dalton JC, Stevanin G, Durr A, Zuhlke C, Burk K, et al: Spectrin mutations cause spinocerebellar ataxia type 5. Nat Genet. 2006, 38: 184-190. 10.1038/ng1728.PubMedGoogle Scholar
- Ohara O, Ohara R, Yamakawa H, Nakajima D, Nakayama M: Characterization of a new beta-spectrin gene which is predominantly expressed in brain. Brain Res Mol Brain Res. 1998, 57: 181-192. 10.1016/S0169-328X(98)00068-0.PubMedGoogle Scholar
- Stankewich MC, Tse WT, Peters LL, Ch'ng Y, John KM, Stabach PR, Devarajan P, Morrow JS, Lux SE: A widely expressed betaIII spectrin associated with golgi and cytoplasmic vesicles. Proc Natl Acad Sci U S A. 1998, 95: 14158-14163. 10.1073/pnas.95.24.14158.PubMed CentralPubMedGoogle Scholar
- Lorenzo DN, Li MG, Mische SE, Armbrust KR, Ranum LP, Hays TS: Spectrin mutations that cause spinocerebellar ataxia type 5 impair axonal transport and induce neurodegeneration in drosophila. J Cell Biol. 2010, 189: 143-158. 10.1083/jcb.200905158.PubMed CentralPubMedGoogle Scholar
- Perkins EM, Clarkson YL, Sabatier N, Longhurst DM, Millward CP, Jack J, Toraiwa J, Watanabe M, Rothstein JD, Lyndon AR, et al: Loss of beta-III spectrin leads to purkinje cell dysfunction recapitulating the behavior and neuropathology of spinocerebellar ataxia type 5 in humans. J Neurosci. 2010, 30: 4857-4867. 10.1523/JNEUROSCI.6065-09.2010.PubMed CentralPubMedGoogle Scholar
- Clarkson YL, Gillespie T, Perkins EM, Lyndon AR, Jackson M: Beta-III spectrin mutation L253P associated with spinocerebellar ataxia type 5 interferes with binding to Arp1 and protein trafficking from the golgi. Hum Mol Genet. 2010, 19: 3634-3641. 10.1093/hmg/ddq279.PubMed CentralPubMedGoogle Scholar
- Gomez CM, Thompson RM, Gammack JT, Perlman SL, Dobyns WB, Truwit CL, Zee DS, Clark HB, Anderson JH: Spinocerebellar ataxia type 6: gaze-evoked and vertical nystagmus, purkinje cell degeneration, and variable age of onset. Ann Neurol. 1997, 42: 933-950. 10.1002/ana.410420616.PubMedGoogle Scholar
- Kato T, Tanaka F, Yamamoto M, Yosida E, Indo T, Watanabe H, Yoshiwara T, Doyu M, Sobue G: Sisters homozygous for the spinocerebellar ataxia type 6 (SCA6)/CACNA1A gene associated with different clinical phenotypes. Clin Genet. 2000, 58: 69-73.PubMedGoogle Scholar
- Jacobi H, Bauer P, Giunti P, Labrum R, Sweeney MG, Charles P, Durr A, Marelli C, Globas C, Linnemann C, et al: The natural history of spinocerebellar ataxia type 1, 2, 3, and 6: a 2-year follow-up study. Neurology. 2011, 77: 1035-1041. 10.1212/WNL.0b013e31822e7ca0.PubMed CentralPubMedGoogle Scholar
- Schmitz-Hubsch T, du Montcel ST, Baliko L, Berciano J, Boesch S, Depondt C, Giunti P, Globas C, Infante J, Kang JS, et al: Scale for the assessment and rating of ataxia: development of a new clinical scale. Neurology. 2006, 66: 1717-1720. 10.1212/01.wnl.0000219042.60538.92.PubMedGoogle Scholar
- Yabe I, Sasaki H, Matsuura T, Takada A, Wakisaka A, Suzuki Y, Fukazawa T, Hamada T, Oda T, Ohnishi A, Tashiro K: SCA6 Mutation analysis in a large cohort of the japanese patients with late-onset pure cerebellar ataxia. J Neurol Sci. 1998, 156: 89-95. 10.1016/S0022-510X(98)00009-4.PubMedGoogle Scholar
- Ishikawa K, Tanaka H, Saito M, Ohkoshi N, Fujita T, Yoshizawa K, Ikeuchi T, Watanabe M, Hayashi A, Takiyama Y, et al: Japanese families with autosomal dominant pure cerebellar ataxia map to chromosome 19p13.1-p13.2 And are strongly associated with mild CAG expansions in the spinocerebellar ataxia type 6 gene in chromosome 19p13.1. Am J Hum Genet. 1997, 61: 336-346. 10.1086/514867.PubMed CentralPubMedGoogle Scholar
- Globas C, du Montcel ST, Baliko L, Boesch S, Depondt C, DiDonato S, Durr A, Filla A, Klockgether T, Mariotti C, et al: Early symptoms in spinocerebellar ataxia type 1, 2, 3, and 6. Mov Disord. 2008, 23: 2232-2238. 10.1002/mds.22288.PubMedGoogle Scholar
- Suenaga M, Kawai Y, Watanabe H, Atsuta N, Ito M, Tanaka F, Katsuno M, Fukatsu H, Naganawa S, Sobue G: Cognitive impairment in spinocerebellar ataxia type 6. J Neurol Neurosurg Psychiatry. 2008, 79: 496-499. 10.1136/jnnp.2007.119883.PubMedGoogle Scholar
- Khan NL, Giunti P, Sweeney MG, Scherfler C, Brien MO, Piccini P, Wood NW, Lees AJ: Parkinsonism and nigrostriatal dysfunction are associated with spinocerebellar ataxia type 6 (SCA6). Mov Disord. 2005, 20: 1115-1119. 10.1002/mds.20564.PubMedGoogle Scholar
- van Gaalen J, Giunti P, van de Warrenburg BP: Movement disorders in spinocerebellar ataxias. Mov Disord. 2011, 26: 792-800. 10.1002/mds.23584.PubMedGoogle Scholar
- McMurtray AM, Clark DG, Flood MK, Perlman S, Mendez MF: Depressive and memory symptoms as presenting features of spinocerebellar ataxia. J Neuropsychiatry Clin Neurosci. 2006, 18: 420-422. 10.1176/appi.neuropsych.18.3.420.PubMedGoogle Scholar
- Brusse E, Brusse-Keizer MG, Duivenvoorden HJ, van Swieten JC: Fatigue in spinocerebellar ataxia: patient self-assessment of an early and disabling symptom. Neurology. 2011, 76: 953-959. 10.1212/WNL.0b013e31821043a4.PubMed CentralPubMedGoogle Scholar
- Eichler L, Bellenberg B, Hahn HK, Koster O, Schols L, Lukas C: Quantitative assessment of brain stem and cerebellar atrophy in spinocerebellar ataxia types 3 and 6: impact on clinical status. AJNR Am J Neuroradiol. 2011, 32: 890-897. 10.3174/ajnr.A2387.PubMedGoogle Scholar
- Murata Y, Kawakami H, Yamaguchi S, Nishimura M, Kohriyama T, Ishizaki F, Matsuyama Z, Mimori Y, Nakamura S: Characteristic magnetic resonance imaging findings in spinocerebellar ataxia 6. Arch Neurol. 1998, 55: 1348-1352. 10.1001/archneur.55.10.1348.PubMedGoogle Scholar
- Nagai Y, Azuma T, Funauchi M, Fujita M, Umi M, Hirano M, Matsubara T, Ueno S: Clinical and molecular genetic study in seven japanese families with spinocerebellar ataxia type 6. J Neurol Sci. 1998, 157: 52-59. 10.1016/S0022-510X(98)00044-6.PubMedGoogle Scholar
- Soong B, Liu R, Wu L, Lu Y, Lee H: Metabolic characterization of spinocerebellar ataxia type 6. Arch Neurol. 2001, 58: 300-304. 10.1001/archneur.58.2.300.PubMedGoogle Scholar
- Zhuchenko O, Bailey J, Bonnen P, Ashizawa T, Stockton DW, Amos C, Dobyns WB, Subramony SH, Zoghbi HY, Lee CC: Autosomal dominant cerebellar ataxia (SCA6) associated with small polyglutamine expansions in the alpha 1A-voltage-dependent calcium channel. Nat Genet. 1997, 15: 62-69. 10.1038/ng0197-62.PubMedGoogle Scholar
- Mariotti C, Gellera C, Grisoli M, Mineri R, Castucci A, Di Donato S: Pathogenic effect of an intermediate-size SCA-6 allele (CAG)(19) in a homozygous patient. Neurology. 2001, 57: 1502-1504. 10.1212/WNL.57.8.1502.PubMedGoogle Scholar
- Matsuyama Z, Yanagisawa NK, Aoki Y, Black JL, Lennon VA, Mori Y, Imoto K, Inuzuka T: Polyglutamine repeats of spinocerebellar ataxia 6 impair the cell-death-preventing effect of CaV2.1 Ca2+ Channel–loss-of-function cellular model of SCA6. Neurobiol Dis. 2004, 17: 198-204. 10.1016/j.nbd.2004.07.013.PubMedGoogle Scholar
- Jodice C, Mantuano E, Veneziano L, Trettel F, Sabbadini G, Calandriello L, Francia A, Spadaro M, Pierelli F, Salvi F, et al: Episodic ataxia type 2 (EA2) and spinocerebellar ataxia type 6 (SCA6) due to CAG repeat expansion in the CACNA1A gene on chromosome 19p. Hum Mol Genet. 1997, 6: 1973-1978. 10.1093/hmg/6.11.1973.PubMedGoogle Scholar
- Toru S, Murakoshi T, Ishikawa K, Saegusa H, Fujigasaki H, Uchihara T, Nagayama S, Osanai M, Mizusawa H, Tanabe T: Spinocerebellar ataxia type 6 mutation alters P-type calcium channel function. J Biol Chem. 2000, 275: 10893-10898. 10.1074/jbc.275.15.10893.PubMedGoogle Scholar
- Piedras-Renteria ES, Watase K, Harata N, Zhuchenko O, Zoghbi HY, Lee CC, Tsien RW: Increased expression of alpha 1A Ca2+ channel currents arising from expanded trinucleotide repeats in spinocerebellar ataxia type 6. J Neurosci. 2001, 21: 9185-9193.PubMedGoogle Scholar
- Worth PF, Giunti P, Gardner-Thorpe C, Dixon PH, Davis MB, Wood NW: Autosomal dominant cerebellar ataxia type III: linkage in a large British family to a 7.6-cM region on chromosome 15q14–21.3. Am J Hum Genet. 1999, 65: 420-426. 10.1086/302495.PubMed CentralPubMedGoogle Scholar
- Houlden H, Johnson J, Gardner-Thorpe C, Lashley T, Hernandez D, Worth P, Singleton AB, Hilton DA, Holton J, Revesz T, et al: Mutations in TTBK2, encoding a kinase implicated in tau phosphorylation, segregate with spinocerebellar ataxia type 11. Nat Genet. 2007, 39: 1434-1436. 10.1038/ng.2007.43.PubMedGoogle Scholar
- Bauer P, Stevanin G, Beetz C, Synofzik M, Schmitz-Hubsch T, Wullner U, Berthier E, Ollagnon-Roman E, Riess O, Forlani S, et al: Spinocerebellar ataxia type 11 (SCA11) is an uncommon cause of dominant ataxia among french and german kindreds. J Neurol Neurosurg Psychiatry. 2010, 81: 1229-1232. 10.1136/jnnp.2009.202150.PubMedGoogle Scholar
- Xu Q, Li X, Wang J, Yi J, Lei L, Shen L, Jiang H, Xia K, Pan Q, Tang B: Spinocerebellar ataxia type 11 in the chinese Han population. Neurol Sci. 2010, 31: 107-109.PubMedGoogle Scholar
- Edener U, Kurth I, Meiner A, Hoffmann F, Hubner CA, Bernard V, Gillessen-Kaesbach G, Zuhlke C: Missense exchanges in the TTBK2 gene mutated in SCA11. J Neurol. 2009, 256: 1856-1859. 10.1007/s00415-009-5209-0.PubMedGoogle Scholar
- Yu GY, Howell MJ, Roller MJ, Xie TD, Gomez CM: Spinocerebellar ataxia type 26 maps to chromosome 19p13.3 Adjacent to SCA6. Ann Neurol. 2005, 57: 349-354. 10.1002/ana.20371.PubMedGoogle Scholar
- Storey E, Bahlo M, Fahey M, Sisson O, Lueck CJ, Gardner RJ: A new dominantly inherited pure cerebellar ataxia, SCA 30. J Neurol Neurosurg Psychiatry. 2009, 80: 408-411.PubMedGoogle Scholar
- Ouyang Y, Sakoe K, Shimazaki H, Namekawa M, Ogawa T, Ando Y, Kawakami T, Kaneko J, Hasegawa Y, Yoshizawa K, et al: 16q-Linked autosomal dominant cerebellar ataxia: a clinical and genetic study. J Neurol Sci. 2006, 247: 180-186. 10.1016/j.jns.2006.04.009.PubMedGoogle Scholar
- Hirano R, Takashima H, Okubo R, Okamoto Y, Maki Y, Ishida S, Suehara M, Hokezu Y, Arimura K: Clinical and genetic characterization of 16q-linked autosomal dominant spinocerebellar ataxia in south Kyushu Japan. J Hum Genet. 2009, 54: 377-381. 10.1038/jhg.2009.44.PubMedGoogle Scholar
- Nagaoka U, Takashima M, Ishikawa K, Yoshizawa K, Yoshizawa T, Ishikawa M, Yamawaki T, Shoji S, Mizusawa H: A gene on SCA4 locus causes dominantly inherited pure cerebellar ataxia. Neurology. 2000, 54: 1971-1975. 10.1212/WNL.54.10.1971.PubMedGoogle Scholar
- Owada K, Ishikawa K, Toru S, Ishida G, Gomyoda M, Tao O, Noguchi Y, Kitamura K, Kondo I, Noguchi E, et al: A clinical, genetic, and neuropathologic study in a family with 16q-linked ADCA type III. Neurology. 2005, 65: 629-632. 10.1212/01.wnl.0000173065.75680.e2.PubMedGoogle Scholar
- Hirano R, Takashima H, Okubo R, Tajima K, Okamoto Y, Ishida S, Tsuruta K, Arisato T, Arata H, Nakagawa M, et al: Fine mapping of 16q-linked autosomal dominant cerebellar ataxia type III in japanese families. Neurogenetics. 2004, 5: 215-221. 10.1007/s10048-004-0194-z.PubMedGoogle Scholar
- Ishikawa K, Toru S, Tsunemi T, Li M, Kobayashi K, Yokota T, Amino T, Owada K, Fujigasaki H, Sakamoto M, et al: An autosomal dominant cerebellar ataxia linked to chromosome 16q22.1 Is associated with a single-nucleotide substitution in the 5' untranslated region of the gene encoding a protein with spectrin repeat and Rho guanine-nucleotide exchange-factor domains. Am J Hum Genet. 2005, 77: 280-296. 10.1086/432518.PubMed CentralPubMedGoogle Scholar
- Amino T, Ishikawa K, Toru S, Ishiguro T, Sato N, Tsunemi T, Murata M, Kobayashi K, Inazawa J, Toda T, Mizusawa H: Redefining the disease locus of 16q22.1-linked autosomal dominant cerebellar ataxia. J Hum Genet. 2007, 52: 643-649. 10.1007/s10038-007-0154-1.PubMedGoogle Scholar
- Ohata T, Yoshida K, Sakai H, Hamanoue H, Mizuguchi T, Shimizu Y, Okano T, Takada F, Ishikawa K, Mizusawa H, et al: A -16C>T substitution in the 5' UTR of the puratrophin-1 gene is prevalent in autosomal dominant cerebellar ataxia in nagano. J Hum Genet. 2006, 51: 461-466. 10.1007/s10038-006-0385-6.PubMedGoogle Scholar
- Sato N, Amino T, Kobayashi K, Asakawa S, Ishiguro T, Tsunemi T, Takahashi M, Matsuura T, Flanigan KM, Iwasaki S, et al: Spinocerebellar ataxia type 31 is associated with "inserted" penta-nucleotide repeats containing (TGGAA)n. Am J Hum Genet. 2009, 85: 544-557. 10.1016/j.ajhg.2009.09.019.PubMed CentralPubMedGoogle Scholar
- Ishikawa K, Durr A, Klopstock T, Muller S, De Toffol B, Vidailhet M, Vighetto A, Marelli C, Wichmann HE, Illig T, et al: Pentanucleotide repeats at the spinocerebellar ataxia type 31 (SCA31) locus in caucasians. Neurology. 2011, 77: 1853-1855. 10.1212/WNL.0b013e3182377e3a.PubMedGoogle Scholar
- Arpa J, Cuesta A, Cruz-Martinez A, Santiago S, Sarria J, Palau F: Clinical features and genetic analysis of a spanish family with spinocerebellar ataxia 6. Acta Neurol Scand. 1999, 99: 43-47.PubMedGoogle Scholar
- Garcia-Planells J, Cuesta A, Vilchez JJ, Martinez F, Prieto F, Palau F: Genetics of the SCA6 gene in a large family segregating an autosomal dominant "pure" cerebellar ataxia. J Med Genet. 1999, 36: 148-151.PubMed CentralPubMedGoogle Scholar
- Ishikawa K, Watanabe M, Yoshizawa K, Fujita T, Iwamoto H, Yoshizawa T, Harada K, Nakamagoe K, Komatsuzaki Y, Satoh A, et al: Clinical, neuropathological, and molecular study in two families with spinocerebellar ataxia type 6 (SCA6). J Neurol Neurosurg Psychiatry. 1999, 67: 86-89. 10.1136/jnnp.67.1.86.PubMed CentralPubMedGoogle Scholar
- Sugawara M, Toyoshima I, Wada C, Kato K, Ishikawa K, Hirota K, Ishiguro H, Kagaya H, Hirata Y, Imota T, et al: Pontine atrophy in spinocerebellar ataxia type 6. Eur Neurol. 2000, 43: 17-22. 10.1159/000008123.PubMedGoogle Scholar
- Shimazaki H, Takiyama Y, Sakoe K, Amaike M, Nagaki H, Namekawa M, Sasaki H, Nakano I, Nishizawa M: Meiotic instability of the CAG repeats in the SCA6/CACNA1A gene in two japanese SCA6 families. J Neurol Sci. 2001, 185: 101-107. 10.1016/S0022-510X(01)00466-X.PubMedGoogle Scholar
- Teive HA, Munhoz RP, Raskin S, Werneck LC: Spinocerebellar ataxia type 6 in brazil. Arq Neuropsiquiatr. 2008, 66: 691-694. 10.1590/S0004-282X2008000500015.PubMedGoogle Scholar
- Takahashi H, Ishikawa K, Tsutsumi T, Fujigasaki H, Kawata A, Okiyama R, Fujita T, Yoshizawa K, Yamaguchi S, Tomiyasu H, et al: A clinical and genetic study in a large cohort of patients with spinocerebellar ataxia type 6. J Hum Genet. 2004, 49: 256-264. 10.1007/s10038-004-0142-7.PubMedGoogle Scholar
- Ikeuchi T, Takano H, Koide R, Horikawa Y, Honma Y, Onishi Y, Igarashi S, Tanaka H, Nakao N, Sahashi K, et al: Spinocerebellar ataxia type 6: CAG repeat expansion in alpha1A voltage-dependent calcium channel gene and clinical variations in japanese population. Ann Neurol. 1997, 42: 879-884. 10.1002/ana.410420609.PubMedGoogle Scholar
- Geschwind DH, Perlman S, Figueroa KP, Karrim J, Baloh RW, Pulst SM: Spinocerebellar ataxia type 6. Frequency of the mutation and genotype-phenotype correlations. Neurology. 1997, 49: 1247-1251. 10.1212/WNL.49.5.1247.PubMedGoogle Scholar
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