Open Access

Primary immunodeficiency associated with chromosomal aberration – an ESID survey

  • Ellen Schatorjé1,
  • Michiel van der Flier2,
  • Mikko Seppänen3,
  • Michael Browning4,
  • Megan Morsheimer5,
  • Stefanie Henriet2,
  • João Farela Neves6,
  • Donald Cuong Vinh7,
  • Laia Alsina8,
  • Anete Grumach9,
  • Pere Soler-Palacin10,
  • Thomas Boyce11,
  • Fatih Celmeli12,
  • Ekaterini Goudouris13,
  • Grant Hayman14,
  • Richard Herriot15,
  • Elisabeth Förster-Waldl16,
  • Markus Seidel17,
  • Annet Simons18 and
  • Esther de Vries1, 19Email author
Orphanet Journal of Rare Diseases201611:110

https://doi.org/10.1186/s13023-016-0492-1

Received: 22 April 2016

Accepted: 27 July 2016

Published: 2 August 2016

Abstract

Background

Patients with syndromic features frequently suffer from recurrent respiratory infections, but little is known about the spectrum of immunological abnormalities associated with their underlying chromosomal aberrations outside the well-known examples of Down and DiGeorge syndromes. Therefore, we performed this retrospective, observational survey study.

Methods

All members of the European Society for Immunodeficiencies (ESID) were invited to participate by reporting their patients with chromosomal aberration (excluding Down and DiGeorge syndromes) in combination with one or more identified immunological abnormalities potentially relating to primary immunodeficiency. An online questionnaire was used to collect the patient data.

Results

Forty-six patients were included from 16 centers (24 males, 22 females; median age 10.4 years [range 1.0–69.2 years]; 36 pediatric, 10 adult patients). A variety of chromosomal aberrations associated with immunological abnormalities potentially relating to primary immune deficiency was reported. The most important clinical presentation prompting the immunological evaluation was ‘recurrent ear-nose-throat (ENT) and airway infections’. Immunoglobulin isotype and/or IgG-subclass deficiencies were the most prevalent immunological abnormalities reported.

Conclusions

Our survey yielded a wide variety of chromosomal aberrations associated with immunological abnormalities potentially relating to primary immunodeficiency. Although respiratory tract infections can often also be ascribed to other causes (e.g. aspiration or structural abnormalities), we show that a significant proportion of patients also have an antibody deficiency requiring specific treatment (e.g. immunoglobulin replacement, antibiotic prophylaxis). Therefore, it is important to perform immunological investigations in patients with chromosomal aberrations and recurrent ENT or airway infections, to identify potential immunodeficiency that can be specifically treated.

Keywords

Genetics Immunology Chromosomal aberration Primary immunodeficiency Mental retardation Recurrent infections

Background

‘Syndromic’ patients frequently suffer from recurrent respiratory infections; it is a major cause of morbidity and mortality in this patient group. However, in these patients immunological work-up is often not performed because an immunodeficiency is not suspected. The infections are often ascribed to food and saliva aspiration [1], structural abnormalities of the upper respiratory tract, neuromuscular problems, malnutrition or institutionalization. Besides, other problems are often more prominent than the recurrent infections. This may lead to underdiagnosis of ‘syndromic immunodeficiency’. However, identification of an underlying immune defect may be therapeutically actionable, which in turn may improve the quality of life in these patients: for instance hypogammaglobulinemia can be treated with immunoglobulin replacement [2, 3]. In addition, information regarding genes critical for the development and functioning of the immune system may be gained by analyzing the precise chromosomal defect and the concomitant immunological phenotype.

Several primary immunodeficiency (PID) disorders have been identified and increasingly their genetic backgrounds have been unraveled [4]. Syndromes with chromosomal abnormalities of number or structure are considered as a distinct group within PID [5]. Clear examples are Down syndrome (trisomy 21) [6] and DiGeorge syndrome (22q11 deletion) [7]. Also, Turner syndrome [8] and Wolf-Hirschhorn syndrome [9] are known to be associated with immunodeficiency. In the past ten years, thirteen cases, three patient series and two families with other chromosomal aberrations and immunological abnormalities have been described in the literature [1027]. There is one study that screened patients with dysmorphic disorders for immune defects. They showed a high incidence of immunodeficiency in this population (23 out of 29 patients had one or more defects); however, they also included 11 patients with Down syndrome [28]. We hypothesize that in patients with chromosomal aberrations, other than the well-known Down and DiGeorge syndromes, concomitant ‘syndromic’ immunodeficiency may be underdiagnosed. To unequivocally prove this, a large case–control study would be needed; this is not really feasible. To explore this further, we performed a retrospective, observational survey study.

Methods

An email message with the proposal to participate in a survey study was sent out to all members of the European Society for Immunodeficiencies (ESID) to identify as many patients known to ESID members as possible with a chromosomal aberration in combination with one or more identified immunological abnormalities relating to PID. Exclusion criteria were trisomy 21 (Down syndrome) and 22q11 deletion (DiGeorge syndrome), because the immunological abnormalities in these syndromes have been described in detail before [6, 7]. Those ESID members who agreed to participate in the study were requested to complete an online questionnaire for each of their eligible patients (Additional file 1). The patients were identified by physician recall. The answers to the questionnaires were encrypted and saved on a protected server; these data did not contain any information that enabled identification of the identity of the patients. Clinical characteristics and identified immunological abnormalities were reported. Age-matched reference values were used for interpretation of immunoglobulin levels and lymphocyte subpopulation counts; values below the age-matched reference values were scored as ‘low’ [2931]. For the interpretation of the vaccine responses (i.e. before and after diagnostic vaccination with Tetanus and PneumoVax® or Pneumo(vax)23®) reference values from the laboratory performing the tests were used. For responses to Pneumovax® or Pneumo(vax)23® measured by serotype, a titer ≥1 IU/ml per serotype was considered to be a sufficient response. If only total IgG for S. pneumoniae was tested, a >4 fold increase of titer was considered as a positive response. Additional immunological tests were performed judged necessary by the treating physician and are therefore only available for some patients. Lymphocyte function tests included in vitro T lymphocyte proliferation tests (to Concanavalin A (ConA), phytohaemagglutinin (PHA), pokeweed mitogen (PWD) and Staphylococcus aureus enterotoxin A (SAE)), natural killer (NK) cell and cytotoxic T cell toxicity (in vitro stimulated CD107a degranulation). Granulocyte function tests included oxidative burst, the quantitative nitroblue tetrazolium dye reduction (NBT) test and phagocytosis test (cells Escherichia coli opsonised). For these additional immunological test (e.g. lymphocyte and granulocyte function tests), the laboratory-specific reference values were used. Furthermore, we asked all the participating centers to provide us with the number of patients with chromosomal aberrations who had undergone an immunological evaluation but were subsequently found not to have an immunological abnormality. This was also based on physician recall. Descriptive statistics were performed. The International System for Human Cytogenetic Nomenclature 2013 (ISCN) was used for cytogenetic nomenclature [32]; an overview is given as a group, and in relation to the specific chromosomal aberrations concerned. The Medical Ethical Committee Brabant approved of the study procedures.

Results

Fifty-two patients from 16 different centers distributed globally were reported. Six patients had to be excluded because they did not meet the inclusion criteria: 3 patients did not have a confirmed chromosomal aberration, 1 patient with Rubinstein-Taybi Syndrome (no chromosomal aberration, only single gene mutation), 1 patient with suspected Kabuki Syndrome (no genetic diagnosis) and 1 patient with Rothmund-Thomson Syndrome (no chromosomal aberration, only single gene mutation). Three other patients did not have an immunodeficiency, these were 3 related patients with familial t (12;14). An overview of the excluded patients is presented in Additional file 2.

The 46 included patients consisted of 24 males and 22 females with a median age of 10.4 years at the moment of reporting (range 1.0–69.2 years; 36 pediatric and 10 adult patients). Two families were reported: patients 17 and 20 are related, as well as patients 18 and 19 (they are also related to the excluded patients 2, 3 and 4, see Additional file 2). Fifteen of these 46 included patients have been published before and publication of two patients is currently in press (for details see Table 1).
Table 1

Clinical characteristics of the included patients

Nr

Sex

Age (yrs)1

Genetics

Immunological presentation2

Other clinical presentations3

Other symptoms

1

M

15.2

46, XY, dup(6) (p12.2p21.31)

Airways

Developmental delay

Dysmorphic features

Microcephaly

Prematurity 36 weeks

Tracheostomy

Feeding difficulties

Infantile pyloric stenosis

Pulmonary congestion

Intractable diarrhoea

2(a)

M

3.4

46, XY.ish der(16)t(16;19) (p13.3;p13.3) arr[hg19] 16p13.3(106 271–1 024 153)x1, 19p13.3 (327 273–6 887 622)x3

Failure to thrive

Developmental delay

Ataxia, paresis or other motor disability

Dysmorphic features

Microcephaly

Growth retardation

Bilateral inguinal hernia

Horse shoe kidney

Hypospadia, hydrocele

Maldescensus testis

3(a)

M

9.4

46, XY.ish der(14)t(14;19) (p11.2;p13.2) de novo; arr[hg19] 19p13.3p13.2(90 897–7 300 043)x3

Unusual infections

Developmental delay

Ataxia, paresis or other motor disability

Dysmorphic features

Microcephaly

Growth retardation

Bilateral incarcerated inguinal hernia

Congenital hip dysplasia

Perineal hypospadia/penoscrotal fistula

Severe osteopenia

Sensorineurinal hearing loss

Epilepsy

4

M

5.6

46, XY, del(18) (p11.2)

Airways

Ataxia, paresis or other motor disability

Growth retardation

na

5

M

12.0

47, XY, +13

Airways

Developmental delay

Growth retardation

Sepsis

Seizures

Gastroesophageal reflux disease

Loss of vision

6

F

6.1

46, XX, del(16) (p11.2)

Airways

Developmental delay

Dysmorphic features

Obesity

Autism

BCGosis

7

M

5.1

46, XY, del(2) (q33.2)

AI disease

Developmental delay

Dysmorphic features

Cleft palate

PDA

Splenomegaly

Auto-immune hemolytic anemia

8

M

1.0

No full karyotype available

Array CGH : gain of 144kB in 9p24.3 and loss of 15MB in 10q26.11.q26.3

Unusual infections

Developmental delay

Dysmorphic features

Microcephaly

Growth retardation

Duodenal atresia

PDA

Micropenis, gonadal agenesia

9

F

5.2

46, XX, del(18) (q22)

AI disease

Developmental delay

Dysmorphic features

Auto-immune polyendocrine syndrome type II with:

Thyroiditis

Vitiligo

Pernicious anemia

Type 1 diabetes mellitus

10

F

1.4

46, XX, arr[hg19] 16p11.2

(29, 567, 295-30, 177, 916)x1 dn

Failure to thrive

Developmental delay

Growth retardation

Recurrent fever

11

F

69.2

45, X

Airways

Dysmorphic features

Growth retardation

Schwannoma

Hearing loss

12

F

6.5

45, X[42]/47, XXX [8]

Airways

Developmental delay

Growth retardation

Currarino syndrome

13

F

41.6

45, X

Unusual infections

Growth retardation

na

14

M

20.1

46, XY, der(X)t(X;18) (q28;q23)

(MECP2 duplication)

Airways

Developmental delay

Ataxia, paresis or other motor disability

Dysmorphic features

Vitiligo

Bronchiectasis

Small intestinal villous atrophy

15(b)

M

7.5

46, XY, r(18)(p11.2q23) [97]/45, XY, -18 [3]

Airways

Developmental delay

Ataxia, paresis or other motor disability

Dysmorphic features

Microcephaly

Growth retardation

ASD II, VSD

Micropenis

16(c)

F

47.7

arr[hg19] 11q24.2q25

(126, 074, 297-134, 927, 114)x1

Airways

Developmental delay

Dysmorphic features

Atopic eczema

VSD

Infertility

HPV associated giant condylomata

Hypothyroid

Idiopathic angio-edema

Severe asthma

Hypersplenism

Obesity, type II diabetes

Bronchiectasis

17(d)

M

22.3

46, XY, der(18)t(10p;18q) with 18q22.3–q23 deletion and partial trisomy of 10pter

Airways

Developmental delay

Ataxia, paresis or other motor disability

Dysmorphic features

Growth retardation

Hypothyroid (subclinical)

Pulmonary valve stenosis

18(e)

F

29.3

46, XX, t(12;14) (p11.2;q13)

AI disease

Atopic eczema

Samter's triad*

ALL

Migraine

Recurrent herpes labialis

HPV associated condylomata

Multiple allergies

19(e)

F

4.9

46, XX, t(12;14) (p11.2;q13)

Airways

None

na

20(d)

F

28.2

46, XX, der(18)t(10p;18q) with 18q22.3–q23 deletion and partial trisomy of 10pter

Airways

Ataxia, paresis or other motor disability

Dysmorphic features

Atopic eczema

Thymus hyperplasia

Atopy

Polyarticular JIA

21

F

31.3

46, XX, arr[hg19] 15q25.2

(83, 214, 012-84, 776, 990)x1

Airways

None

Allergy

Epilepsy

Asthma

Cholesteatoma

Recurrent monoarthritis

22

M

34.3

46, XY, inv(10)(q21q23)

AI disease

None

Asymptomatic

23(f)

F

6.9

46, XX, del(19)(p13.13)

Airways

Developmental delay

Ataxia, paresis or other motor disability

Dysmorphic features

Microcephaly

Growth retardation

IUGR

Epilepsy

24(f)

M

9.6

46, XY, r(18)

AI disease

Developmental delay

Dysmorphic features

Growth retardation

Hypopigmentation

Panniculitis with lipodystrophy

Auto-immune hypothyroidism

Vitiligo

Chronic urticaria

Subaortic stenosis

25(g)

M

16.8

46, XY, der(11)dup(11) (q22q23)del(q24.3)

Airways

Developmental delay

Ataxia, paresis or other motor disability

Dysmorphic features

Atopic eczema

Hair and/or nail abnormalities

na

26

M

3.7

No full karyotype available

arr[hg19]11p12-p11.12 (38.090.281-49.257.082)x1

Airways

Developmental delay

Ataxia, paresis or other motor disability

Dysmorphic features

Defective absorption folinic acid

27

F

10.3

46, XX, del(11)(q11)

Failure to thrive

Developmental delay

Dysmorphic features

Growth retardation

Atopic eczema

na

28

F

5.9

49, XXXXX

Pyogenic infections

Developmental delay

Ataxia, paresis or other motor disability

Dysmorphic features

PS and ASD

Hypermobility

Radio-ulnar synosthosis

29

M

15.1

46, XY.ish del(X) (p11.3p11.3)

(RP4-628F15+, RP11-245M24 dim, RP6-99M1-, RP4-689N3-, RP11-1409+)mat

Failure to thrive

Developmental delay

Microcephaly

Growth retardation

Visual impairment

Retinitis pigmentosa

30

M

9.4

46, XY, r(6)

Airways

Developmental delay

Dysmorphic features

Microcephaly

Growth retardation

Gastro-oesofageal reflux

Dilated cardiomyopathy and small VSD

31(h)

F

12.8

46, XX, del(18)(p11.1)

Airways

Developmental delay

Ataxia, paresis or other motor disability

Dysmorphic features

Growth retardation

Type I diabetes mellitus

Growth hormone deficiency

Autoimmune thyroiditis

Pectus excavatum

Retrognathia with absent maxillary chondyles

32

M

6.8

46, XY, del(7)(q22.3 q31.3)

Airways

Developmental delay

Dysmorphic features

na

33

F

14.7

47, XX, +der(22)t(11;22) (q23;q11) mat (partial trisomy 11q)

Airways

Developmental delay

Ataxia, paresis or other motor disability

Palatoschizis, preauricular tags

Anus atresia

Urolithiasis

34

F

7.9

46, XX.arr snp 2p23.1 (SNP_A-2078092->SNP_A-2248377)x1 mat

Same pathogen

Developmental delay

Ataxia, paresis or other motor disability

Dysmorphic features

Mitochondrial dysfunction

Acracyanosis

Bronchiectasis

Hyposplenia

35

M

11.3

46, XY.arr[hg19] 3p14.3 (57, 994, 310-58, 071, 249)x1 pat

Airways

Developmental delay

Dysmorphic features

Submucosal palatal schisis

Transient neonatal macroglossi

Hepatosplenomegaly

36

F

6.8

45, X

Airways

None

na

37

F

20.2

46, XX, der(2)t(2;10)(q37.3;q26.3)mat.arr snp 2q37.2q37.3(SNP_A-1957498->SNP_A-2027809)x1,10q26.3 (SNP_A-2264115->SNP_A-1934598)x3

Airways

Developmental delay

Ataxia, paresis or other motor disability

Autistiform developmental delay

Splenomegaly

Cytopenias

Granulomata

Gastroparesis

Obesitas

38(i)

M

6.5

49, XXXXY

Airways

Developmental delay

Dysmorphic features

na

39(i)

M

10.6

49, XXXXY

Airways

Developmental delay

Dysmorphic features

na

40(i)

M

14.6

49, XXXXY

Airways

None

na

41(i)

M

13.3

49, XXXXY

Airways

Developmental delay

Dysmorphic features

na

42(i)

M

11.7

49, XXXXY

Airways

Developmental delay

Dysmorphic features

Atopic eczema

na

43

M

12.2

47, XYY, dup(22) (q11.21)

Pyogenic infections

Developmental delay

Ataxia, paresis or other motor disability

Dysmorphic features

Microcephaly

Asthma

44

F

3.8

46, XX.arr snp 1q44 (SNP_A-2136114->SNP_A-4223408)x1 dn, 11p11.2p11.12 (SNP_A-1817808->SNP_A-4198132)x3 pat

Airways

Developmental delay

Dysmorphic features

Microcephaly

Growth retardation

Atopic eczema

Epilepsy

Rocker bottom foot

Cow’s milk allergy

Feeding difficulties

45

F

6.7

46, X, idic(X) (p11.21).arr snp 22q11.21 (SNP_A-2108791->SNP_A-2160861)x3 mat, Xp22.33p11.21(SNP_A-4207883->2247707)x1 dn, Xp11.21q28(SNP_A-4201150->SNP_A-2267820)x3 dn

Airways

Developmental delay

Growth retardation

Prematurity; gestational age 30 weeks

Bone anchored hearing aid

Periorbital hemangioma

46

F

12.9

46, XX, arr cgh 16p13.11p13.12

(14, 687, 636-16, 452, 200) x3.

Airways

Developmental delay

Ataxia, paresis or other motor disability

Dysmorphic features

Microcephaly

Growth retardation

Atopic eczema

Severe scoliosis

Seizures

Myopathy of unknown etiology

Chronic progressive external ophthalmoplegia

Contractures; wheelchair bound

Headings: Nr = patient number; 1at the time of reporting; 2most prominent clinical immunological presentation; 3other clinical presentations as requested in the survey (Additional file 1)

Patients: (a) previously published in Seidel MG, Duerr C, Woutsas S, et al. J Med Genet 2014;51:254–263, (b) previously published in Celmeli F, et al. J Investig Allergol Clin Immunol. 2014;24(6):442–4, (c) previously published in Seppänen et al. J Clin Immunol 2014;34:114–118., (d) family members and previously published in Dostal et al. International Journal of Immu-genetics 2007;34: 143–147 : patient 17 as IV:4 and patient 20 as IV, (e) family members, together with excluded patient 2, 3 and 4, (f) publication in press, Calvo Campoverde K, et al. Allergologia et Immunopathologia 2016, (g) previously published in Fernandez-San Jose C, J Paediatr Child Health 2011;47(7):485–6, (h) previously published in Browning MJ, J Investig Allergol Clin Immu-l 2010;20(3):263–266, (i) previously published in Keller MD, et al. Am J Med Genet C Semin Med Genet. 2013;163C(1):50–4

Clinical presentations: Airways = Recurrent ENT and airway infections; FTT = failure to thrive from early infancy; unusual infections = unusual infections or unusually severe course of infections; AI disease = autoimmune or chronic inflammatory disease, lymphoproliferation; pyogenic infections = recurrent pyogenic infections; same pathogen = recurrent infections with the same type of pathogen (de Vries E. Clin Exp Immunol 2012;167(1):108–19.)

Other abbrevations: ALL acute lymphatic leukemia, ASD atrial septum defect, BCG Bacillus Calmette-Guérin, F female, HPV human papilloma virus, IUGR intra uterine growth retardation, JIA juvenile idiopathic arthritis, M male, na not available, PDA patent ductus arteriosus, PEG percutaneous endoscopic gastrostomy, PS pulmonary stenosis, VSD ventricular septum defect, yrs: years

* Samter’s triad: asthma, aspirin and NSAID sensitivity, and nasal/ethmoidal polyposis

Seven out of the total 16 centers provided the number of patients with chromosomal aberrations who had undergone an immunological evaluation but were subsequently found not to have an immunological abnormality. Together, they reported 27 patients with immunological abnormalities in this survey; they also reported 63 patients with chromosomal aberrations in whom immunological assessment revealed no abnormality. Thus, of these centers 30 % of the patients with chromosomal aberrations who underwent immunological evaluation were diagnosed with some form of primary immunodeficiency.

Symptoms indicative of PID can be divided into eight different clinical presentations [29]; ‘recurrent ear-nose-throat (ENT) and airway infections’ were most commonly reported in this cohort (in 43/46 patients). In 31/46 patients, ‘recurrent ENT and airway infections’ was reported as the clinically most important presentation. Other PID-related manifestations reported as the most important clinical presentation include ‘auto-immune or chronic inflammatory disease; lymphoproliferation’(n = 5); ‘failure to thrive from early infancy’ (n = 4); ‘unusual infections or unusually severe course of infections’(n = 3); ‘recurrent pyogenic infections’ (n = 2) and ‘recurrent infections with the same type of pathogen’(n = 1). The most common syndromic-related manifestations were: developmental delay (n = 37), ataxia, paresis or other motor disability (n = 16), dysmorphic features (n = 31), microcephaly (n = 11), growth retardation (n = 19), atopic eczema (n = 8), hair and/or nail abnormalities (n = 1) and hypopigmentation (n = 1). A detailed overview of the clinical findings is shown in Table 1.

Antibody deficiency was the most common immunological defect identified. Of 33 patients reported to have low immunoglobulin isotype(s), 20 had low IgG (Fig. 1). Nine patients had low IgG with completely absent IgA and 8 patients had low IgG in combination with low IgM. IgG subclass deficiency was identified in 18 patients, of which 15 had concomitant low total immunoglobulin isotype(s) and 3 did not. Vaccine responses were tested in 32/46 patients and were found insufficient in 18 patients: 16/18 were insufficient for pneumococcal polysaccharide vaccine. Four patients (no. 2, 22, 23 and 24) showed normal antibody production after diagnostic vaccination despite low serum immunoglobulins. For patients 23 and 24, however, the decreased response was based on total IgG for S. pneumoniae. Responses to live vaccines were not documented; no unfavorable outcomes of natural chickenpox infection were reported. 18/46 patients were treated with immunoglobulin replacement. The indication of immunoglobulin replacement therapy was based on clinical grounds, as judged by the treating physician. In 2 patients lymphopenia was reported; one of them was neutropenic as well. Lymphocyte subpopulations (CD3, CD4, CD8, CD19 and CD16/56) were determined in 36 patients; in 16 a decreased count of ≥1 (sub)populations was reported. In 11 patients more extensive B cell subpopulations were determined and in 7 patients extensive T cell subpopulations (protocols differed per patient). In 1 patient total absence of B lymphocytes was reported (patient number 5; trisomy 13). Lymphocyte and granulocyte function tests were performed in 11 and 11 patients, respectively; in 2 decreased lymphocyte as well as granulocyte function was reported (patients 2 and 3). A detailed overview of the immunological and other laboratory findings is presented in Table 2 and Additional file 3.
Fig. 1

Levels of immunoglobulin isotypes. Every dot represents a patient. The bold black line is the lower limit of normal according to age-matched reference values (ref de Vries E. Clin Exp Immunol 2012;167(1):108–19.). a: IgG in g/L. b: IgA in g/L; two values > 2.0 g/l are not displayed in the graph. c: IgM in g/L

Table 2

Results of immunological and other diagnostic tests in the included patients. A: Immunological screening tests

Nr

NP

LP

↓G

↓A

↓M

↓IgG subclass

Lymphocyte subsets

Resp TV

Resp P

L function

G function

1

-

-

+

+*

-

na

 

↑ aCD3, ↑ aCD3CD4

na

na

2(a)

-

-

+

-

+

+

IgG1, IgG3

↓ aCD3, ↓ a smB

nl

nl

↓ NK toxicity

Oxidative burst borderline ↓

In vitro lymphocyte proliferation: nl

3(a)

-

-

-

-

-

-

 

Borderline ↓ a smB

nl

nl

↓ vitro lymphocyte proliferation decreased from 7 years on: SEA

Moderate ↓ oxidative burst

4

-

-

-

+

-

na

 

na

na

nl

na

na

5

-

-

+

+*

+

+

IgG1, IgG2, IgG3

Absence of CD19 cells

na

na

In vitro lymphocyte proliferation: nl

na

6

-

-

-

+*

-

-

 

↑ aCD3, ↑ aCD3CD4, ↑ aCD19

nl

nl

na

nl

7

-

-

-

+*

-

na

 

↓ aCD3, ↓ aCD3CD8 ↓ aCD19

na

na

na

8

-

-

+

+*

-

na

 

nl

na

na

na

na

9

-

-

-

-

-

-

 

↑ aCD16/56

na

nl

na

10

-

-

-

-

-

na

 

↑ aCD3, ↑ aCD19, ↑ aCD16/56

nl

na

Thymic function: nl

na

11

-

-

+

-

-

na

 

↓ aCD3CD8, ↓ aCD19, ↑ aCD16/56

na

nl

na

nl

12

-

-

+

+

-

na

 

↑ aCD3, ↑ aCD3CD4, ↑ aCD19

nl

na

na

na

13

+

+

+

-

-

na

 

↓ aCD3CD4, ↓ aCD19, ↓ aCD16/56, ↑ aCD3CD8

na

na

na

na

14

-

-

-

+

+

+

IgG2, IgG4

nl

na

(j)

na

na

15(b)

-

-

-

-

+

-

 

nl

na

na

nl

nl

16(c)

-

-

+

+

-

+

IgG1, IgG2, IgG4

↓ aCD3, ↓ aCD3CD4, ↓ aCD19, ↓ aCD16/56

na

na

na

na

17(d)

-

-

-

+*

-

+**

IgG2, IgG4

nl

na

na

na

na

18(e)

-

-

+

-

-

+

IgG1, IgG2, IgG4

↓ aCD19, ↓ aCD16/56

na

na

na

na

19(e)

-

-

+

+*

-

+

IgG1

na

na

na

na

na

20(d)

-

-

-

+*

-

+

IgG4

↓ aCD16/56

na

na

na

na

21

-

-

-

-

-

+

IgG3, IgG4

↓ aCD19 cells, slightly ↓ aMZ-like B, ↑ aCD3, ↑ aCD3CD8

nl

nl

nl

na

22

-

+

+

+

+

-

 

↓ aCD3, ↓ aCD3CD4, ↓ aCD3CD8, ↓aCD19 cells (BM)

nl

nl

na

na

23(f)

-

-

+

+

-

+

IgG1, IgG2, IgG4

↓ aCD3CD4, ↓ aCD16/56

nl

nl(j)

↓ In vitro lymphocyte proliferation: PHA = 85 %, PWD = 72 %, ConA = 39 %

na

24(f)

-

-

+

+*

-

+***

IgG2, IgG3, IgG4

↓ aCD3CD8

nl

nl(j)

↓ In vitro lymphocyte proliferation: PHA = 92 %, PWD = 87 %, ConA = 28 %

na

25(g)

-

-

+

+

+

na

 

na

nl

↓ In vitro lymphocyte proliferation: PHA

na

26

-

-

+

-

+

+

IgG1, IgG3

na

na

na

na

27

-

-

-

-

-

-

 

↓ aCD3, ↓ aCD3CD4, ↓ aCD3CD8, ↓ aCD19, ↓ aCD16/56

↓ In vitro lymphocyte proliferation: PHA

na

28

-

-

-

+

+

na

 

↑ aCD3, ↑ aCD3CD4, ↑ aCD3CD8, ↑ aCD19

nl

nl

na

nl

29

-

-

-

-

-

-

 

↑ aCD3CD8, ↑ aCD19

nl

na

nl

30

-

-

-

-

+

na

 

↓ aCD3, ↓ aCD3CD8 cells, ↑ aCD19

nl

na

nl

31(h)

-

-

-

+

-

+

IgG2

↑ aCD3, ↑ aCD3CD4, ↑ aCD3CD8, ↑ aCD19

nl

na

nl

32

-

-

-

+

+

na

 

↑ aCD19

nl

nl

na

nl

33

-

-

-

-

-

+

IgG1

na

na

nl

na

na

34

-

-

-

-

-

-

 

nl

na

na

nl

35

-

-

-

+

-

+

IgG2

nl

na

na

na

36

-

-

+

+

-

na

 

na

na

na

na

na

37

-

-

+

+

+

+

IgG1, IgG2

↓ aCD3, ↓ aCD3CD8, ↓ aCD19, ↓ aCD16/56 cells, ↓ a memB

na

na

na

na

38(i)

-

-

+

-

-

na

 

na

na

na

na

39(i)

-

-

na

na

na

na

 

↑ aCD3CD4

na

na

na

40(i)

-

-

-

-

-

na

 

↑ aCD3, ↑ aCD3CD4

na

na

na

41(i)

-

-

-

-

-

na

 

na

na

na

na

42(i)

-

-

-

-

-

-

 

↑ aCD3, ↑ aCD3CD4, ↑ aCD19, ↑ aCD16/56

na

na

na

43

-

-

+

+

-

+

IgG2

↑ aCD3, ↑ aCD3CD4, ↑ aCD3CD8, ↑ aCD 19

nl

na

na

44

-

-

-

-

-

+

IgG1

na

na

na

na

na

45

-

-

-

+

-

-

 

na

na

na

na

na

46

-

-

+

+

+

na

 

nl

na

na

na

na

Headings: Nr patient number, NP neutropenia, LP lymphopenia,↓G: low IgG,↓A: low IgA,↓M: low IgM.↓IgG subclass: low IgG subclasses, Resp TV response tetanus vaccine, Resp P response PneumoVax® or Pneumo23®, L function: lymphocyte function tests, G function: granulocyte function tests

Patients: (a) previously published in Seidel MG, Duerr C, Woutsas S, et al. J Med Genet 2014;51:254–263, (b) previously published in Celmeli F, J Investig Allergol Clin Immunol. 2014;24(6):442–4, (c) previously published in Seppänen et al. J Clin Immunol 2014;34:114–118., (d) family members and previously published in Dostal et al. International Journal of Immu-genetics 2007;34: 143–147 : patient 17 as IV:4 and patient 20 as IV, (e) family members, together with excluded patient 2, 3 and 4, (f) publication in press, Calvo Campoverde K, et al. Allergologia et Immunopathologia 2016, (g) previously published in Fernandez-San Jose C, J Paediatr Child Health 2011;47(7):485–6. (h) previously published in Browning MJ, J Investig Allergol Clin Immu-l 2010;20(3):263–266, (i) previously published in Keller MD, et al. Am J Med Genet C Semin Med Genet. 2013;163C(1):50–4, (j) decreased response to Pneumovax ® or Pneumo23® based on total IgG for S. pneumoniae

* IgA completely absent, ** IgG2 completely absent, ***IgG3 completely absent

Other abbrevations: a absolute cell count, BM bone marrow, CD cluster of differentiation, ConA Concanavalin A, memB memory B cells, MZ marginal zone, na not available, nl normal, PHA phytohaemagglutinin, PWD pokeweed mitogen, SEA Staphylococcus aureus enterotoxin A, smB switched memory B cells

Discussion

Our call identified 46 patients with chromosomal aberration associated with immunodeficiency, the largest cohort reported in the literature so far (42 isolated cases, and twice 2 patients from the same family). Based on data from 7/16 participating centers, up to one third of patients with chromosomal aberrations and recurrent infections may have some form of primary immunodeficiency. Because the patients in this study were identified by physician recall, reporter bias is possible. However, the relative number is much higher than the 6 % found in a cohort of 259 ‘normal’ children screened for immunological abnormalities because of recurrent infections by Brodszki et al. [33]. The most common clinical presentation in our cohort was recurrent ENT and airway infections, which triggered their physician to perform immunological investigations. Not surprisingly, these were mostly ‘predominantly antibody deficiencies’ [34] ranging from IgG-subclass deficiency and/or polysaccharide antibody deficiency to severe hypogammaglobulinemia or even agammaglobulinemia in one patient. While this study may have limitations inherent to a retrospective, observational survey (e.g. recall bias; reporting bias; convenience sampling), these findings suggest that 'syndromic immunodeficiency’ may be under-diagnosed.

A previous study in patients with dysmorphic features found low CD19+ and CD16+ and/or CD56+ cells as the most frequent immunological abnormalities, followed by low immunoglobulins [28]. However, in contrast to our survey this study also included a lot of patients with Down syndrome (11/29 patients) who are known to have lower CD19+ and CD3CD16+ and/or CD56+ cells [6], precluding an appreciation for the possibility of underlying immunodeficiency in patients with non-Down, chromosomal syndromes. Until now, no other cohorts of patients with different chromosomal aberrations associated with immunological abnormalities have been described. The chromosomal aberrations described in our study may provide insight regarding novel genes involved in the immune system, either located directly within or adjacent to the anomalous loci. Several of the cytogenetic abnormalities in our patients have been linked to immunodeficiency or -dysregulation in the literature before.

The largest family in our cohort consists of 5 affected patients with 46, XX, t (12;14) (p11.2;q13) (patients 18, 19 and excluded patients 2, 3 and 4). Only two had immunodeficiency (patients 18 and 19), both with low IgG-levels and one with additional IgA-deficiency and decreased numbers of CD19+ and CD3CD16+and/orCD56+ cells. All patients in this family suffered from atopy, asthma and/or allergy (some with anaphylaxis); two developed acute lymphatic leukemia. A candidate gene located on chromosome 14q13 is nuclear factor of kappa light chain gene enhancer in B cells inhibitor alpha (NFKBIA) (OMIM 164008). NFKBIA inactivates NF-kappa-B by trapping it in the cytoplasm. Functional impairment of NFKBIA can result in increased activation of the NF-kappa-B pathway leading to immune dysregulation [35].

The other family in our cohort consists of two cousins with an unbalanced translocation t (18q;10p), namely t (18q-;10p+) (patients 17 and 20), effectively resulting in a 18q22.3–q23 deletion and a partial trisomy of 10pter. Both showed IgA-deficiency and IgG-subclass deficiency (both IgG4 and one also IgG2), and one showed decreased numbers of CD3CD16+and/or CD56+ cells. One of the cousins showed diffuse thymic hyperplasia (patient 20) without evidence of developing thymoma. Although patients with complete 10p trisomy are not reported to have immunodeficiency [36, 37], patients with terminal deletions of 10p have been reported with IgA- and IgG-deficiency before [21, 38]. The 18q − syndrome is associated with IgA-deficiency and other autoimmune or immunodeficiency diseases, such as common variable immunodeficiency (CVID) [39], juvenile rheumatic arthritis [40], insulin-dependent diabetes mellitus [41], celiac disease [42] and thyroid hormone abnormalities [43]. This partly matches the clinical phenotypes of our related patients. The other patients in our cohort with chromosome 18q aberrations all but one also showed IgA-deficiency (patients 9, 14, and 20). The two cousins from our study are part of a Finnish family with t (18q;10p), which was published in 2007 [20]. All members of this family showed IgA-deficiency; IgG-subclasses were not tested in the other family members. The authors hypothesized that the observed IgA-deficiency may result from haplo-insufficiency of one or multiple genes located in the 18q22.3–q23 region in possible connection with a larger polygenic network.

Our cohort contains two patients with ring chromosome 18 (one mosaic (patient 15) and one with complete chromosome 18 deletion (patient 24)) and one patient with 18p deletion (patient 31). Deletions of chromosome 18p have also been associated with immune-related dysfunction like autoimmune thyroiditis, diabetes mellitus, IgA deficiency, atopic skin conditions, juvenile rheumatoid arthritis [12, 15, 22, 25], and in one patient with SLE [12]. This matches with our patients: two patients had an IgA-deficiency and the patient with 18p deletion had multiple endocrine dysfunctions. However, our patient with a mosaic form of ring chromosome 18 (46, XY, r(18) (p11.2q23) [97]/45, XY, -18 [3], patient 15) showed only low IgM with recurrent respiratory tract infections, as published before [27].

Four of our patients showed chromosome 11q deletions (patients 16, 25, 27 and 33); two of them were published before [14, 26]. Terminal deletion of chromosome 11 can cause Jacobsen syndrome [44] and has previously been associated with hypogammaglobulinemia, pancytopenia and low T-helper cell counts [45, 46]. Our patients with 11q deletion did not show neutropenia or lymphopenia, but three of them had both IgG- and IgA-deficiency. No low T-helper cell counts were reported.

Two centers reported a patient with deletion of chromosome 16p11.2 (patients 6 and 10). Deletions in this region of chromosome 16 are associated with intellectual disability, congenital anomalies, obesity, macrocephaly, and autism [47]. This matches the clinical picture of one of our patients. Both patients showed only minor immunological abnormalities: IgA deficiency and global lymphocytosis. Recently, single nucleotide polymorphisms at the fused-in-sarcoma (FUS)/integrin CD11b (ITGAM) locus at 16p11.2 were associated with CVID phenotypes [48]. In the literature, there is also a report of an autistic girl with a 16p11.2 deletion who also had severe combined immunodeficiency (SCID) caused by Coronin-1A deficiency (also located at 16p11.2) [49]. Coronin-1A is essential for development of a normal peripheral T cell compartment in mice as well as men [33, 50]. However, this girl had, in contrast to our patient, next to the 16p11.2 deletion, also a 2 bp deletion of the Coronin-1A gene on the other (paternal) allele.

Several patients with X-chromosome aberration were included. Turner syndrome (45, X) is known to be associated with immunodeficiency [5, 8], but with different clinical presentations. Our four Turner patients (patients 11, 13 and 36, and patient 12 with mosaicism Turner) also showed a variety of immunological abnormalities. The relationship, if any, between the immune defects in Turner syndrome and those in established X-linked PID remains unknown. Additionally, 5 boys with 49, XXXXY (patients 38, 39, 40, 41 and 42) and 1 girl with 49, XXXXX (patient 28) were reported. The 49, XXXXX girl presented with pyogenic infections and low IgG and IgM levels, but with normal granulocyte levels and function. The 49, XXXXY boys all presented with ‘recurrent ENT and airway infections’, and they all showed impaired antibody responses to pneumococcal polysaccharide antigens, as was published before [11].

Conclusion

This retrospective survey demonstrates that patients with chromosomal aberrations and recurrent infections may harbor underlying primary immunodeficiencies. By specifically excluding the syndromic immunodeficiencies associated with Down and DiGeorge syndromes, we showed that a diverse spectrum of chromosomal aberrations can be associated with immunological abnormalities. In our cohort antibody deficiency was the most prevalent; this is important because infectious complications can be prevented with early interventions like antibiotic prophylaxis or immunoglobulin replacement treatment in these patients. To assess whether this association is a truly causal relation, a large case–control study would be needed; this is not really feasible. And of course, our survey results do not negate other contributing factors (e.g. aspiration; abnormal anatomy) in the development of recurrent ENT and airway infections in these patients. Nonetheless, our findings suggest it is important to consider immunological investigations in patients with chromosomal aberration and recurrent infections.

Abbreviations

ConA, concanavalin A; CVID, common variable immunodeficiency; ENT, ear-nose-throat; ESID, European society for immunodeficiencies; FUS, fused-in-sarcoma; ISCN, International System for Human Cytogenetic Nomenclature; ITGAM, integrin CD11b; NBT, nitroblue tetrazolium dye reduction; NFKBIA, nuclear factor of kappa light chain gene enhancer in B cells inhibitor alpha; NK, natural killer cell; PHA, phytohaemagglutinin; PID, primary immunodeficiency; PWD, pokeweed mitogen; SAE, staphylococcus aureus enterotoxin A; SCID, severe combined immunodeficiency

Declarations

Acknowledgments

We would like to thank the Jeroen Bosch Hospital for providing the online survey system for free, Ms Riet Strik-Albers Nurse Practitioner (Amalia Children’s Hospital, Radboud University Medical Center, Nijmegen, the Netherlands), Ms Nuria Murtra (Hospital Vall d’Hebron, Barcelona, Spain) and Ms Mélanie Langelier Research Nurse (B.Sc.N; Infectious Disease Susceptibility Program; McGill University Health Centre, Montreal, Canada) for help in data collection and the ESID Board for the permission to perform this study. Special thanks to The Focus Foundation for their continued support of rare disorders, particularly the X and Y chromosomal variation population.

Funding

No funding for this study.

Availability of data and materials

The dataset supporting the conclusions of this article is included within the article (and its additional files).

Authors’ contributions

ES coordinated data collection from her patients, carried out the initial analyses and drafted the initial manuscript. EdV conceptualized and designed the study, coordinated data collection from her patients, critically reviewed and revised the manuscript. MvdF, MS, MB, MM, SH, JFN, DCV, LA, AG, PSP, TB, FC, EG, GH, RH, EFW and MS coordinated data collection from their patients, reviewed the manuscript and offered suggestions for revision. AS critically revised the genetic diagnoses and information in the manuscript. All authors agreed to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved. All authors read and approved the final manuscript.

Competing interests

AG has received research grants and advisory board from Shire and speaker honoraria from CSL Behring. DCV is supported by a Chercheur Boursier Junior 1 award from the Fonds de recherché du Québec–Santé (FRQS) and awards from the McGill University Health Centre Department of Medicine and Research Institute-MUHC/Merck Sharp & Dohme. He has received unrestricted educational grants and advisory board honoraria from CSL Behring Canada, advisory board honoraria from Pfizer Canada, and speaker honoraria from Sunovion Canada. EdV has received unrestricted research grants from CSL Behring and Sanquin. MvdF received an unrestricted educational grant from Baxter. MS has received gratuities from Baxter, CSL Behring, Octapharma and Sanquin, and has received funding from the Finnish Medical Foundation. PSP has received grants from CSL Behring, Baxter and Octapharma.

Consent for publication

Not applicable.

Ethics approval and consent to participate

Since this is a retrospective, observational study based on anonymous reporting by treating physicians, there are no ethical or privacy issues at stake in this study (METC Brabant). If needed according to the laws of the respective country, informed consent from the patient/parents was sought by the reporting physician.

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

Authors’ Affiliations

(1)
Department Pediatrics, Jeroen Bosch Hospital
(2)
Department of Pediatrics, Amalia Children’s Hospital and Radboud Institute for Molecular Life Sciences, Radboudumc
(3)
Immunodeficiency Unit, Inflammation Center and Center for Rare Diseases, Children’s Hospital, Helsinki University and Helsinki University Hospital
(4)
University Hospitals of Leicester NHS Trust
(5)
Children’s Hospital of Philadelphia
(6)
Primary Immunodeficiencies unit Hospital Dona Estefania, Centro Hospitalar de Lisboa Central
(7)
McGill University Health Centre
(8)
Allergy and Clinical Immunology Department, Hospital Sant Joan de Deu
(9)
Faculty of Medicine ABC
(10)
Pediatric Infectious Diseases and Immunodeficiencies Unit, Hospital Universitari Vall d’Hebron
(11)
Mayo Clinic
(12)
Antalya Education and Research Hospital Department of Pediatric Immunology and Allergy
(13)
Universidade Federal do Rio de Janeiro
(14)
Epsom & St Helier University Hospitals NHS Trust
(15)
NHS Grampian
(16)
Department of Pediatrics and Adolescent Medicine, Center for Congenital Immunodeficiencies, Medical University Vienna
(17)
Pediatric Hematology-Oncology, Medical University Graz
(18)
Department of Human Genetics, Radboudumc
(19)
Department Tranzo, Tilburg University

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