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Table 2 Characteristic of the studies of genetics involved in microtia

From: Genotype-phenotype associations in microtia: a systematic review

No.

First author’s surname/country of origin/year of publication

Study design

Sample size

Syndrome

Related Gene

Genetic level of disorder

Mutation type – DNA / RNA Chromosome

Homozygous / Heterozygous

Inheritance

Sequencing System

1.

Gimelli/Italy/ 2013 [50]

CR

1

TCS : 1

SPATA7 : 1

Chromosome

Interstitial deletion

Heterozygous

Autosomal Recessive

Array CGH

2.

Glaeser/Brazil/ 2021 [51]

CR

1

CES, OAVS, CFM

BCL2L13 : 1; BID : 1; CECR1 : 1; CECR2 : 1; CECR4 : 1; CECR5 : 1; CECR6 : 1; CECR7: 1; FLJ 41941 : 1; HSFY1P1 : 1; IL17RA: 1; MICAL3 : 1; MIR 3198 : 1; MIR648 : 1; PEX26 : 1; SLC25A18: 1; TUBA8e: 1; XKR3 : 1

Chromosome

Inverted duplication

Heterozygous

Mitochondrial

Whole Genome Array CGH

3.

Tassano/Italy/2015 [52]

CR

1

-

FOXI3 : 1

Chromosome

Interstitial deletion

Homozygous

Autosomal Dominant

PCR

4.

Chaves/Brazil/ 2019 [53]

CR

1

-

BBS4 : 1

DNA

Duplication

Homozygous

Autosomal Recessive

Microarray

5.

Huang/China/2013 [54]

CR

1

CFM

PLA2G4A : 1; C1orf99 : 1

Chromosome

Duplication

Heterozygous

Autosomal Recessive

G-banded chromoso me analysis

6.

Kim/South Korea/2020 [55]

CR

1

MFDM

EFTUD2 : 1

DNA

Deletion

Heterozygous

Autosomal Dominant

Sanger sequencing Minigene Assay

7.

Goldmuntz/Philadelphia/2011 [56]

CR

1

CFM

NRP1 : 1

DNA

Deletion

Heterozygous

Autosomal Dominant

PCR

8.

Brun/France/2012 [57]

CR

1

15q24 deletion Syndrome, OAVS, CFM

STRA6 : 1; and other unexplained 36 genes involved

Chromosome

Deletion

Heterozygous

Autosomal Recessive

Array CGH

9.

Koprulu/Turkey/2021 [58]

CR

1

FRASRS1: 1

GRIP1 : 1

DNA

Deletion

Homozygous

Autosomal Recessive

Sanger sequencing

10.

Hu/America/2019 [59]

CR

1

-

FGFR1 : 1

DNA

-

Heterozygous

Autosomal Dominant

NGS

11.

Jarzabek/Poland/2012 [60]

CR

1

Kallmann Syndrome: 1

FGFR1 : 1

DNA

-

Homozygous

Autosomal Dominant

Sanger technique

12.

Knapp/Maryland/202 0 [61]

CR

1

MGORS: 1

DONSON : 1

DNA

-

Heterozygous

Autosomal Recessive

Chromium WGS sequencing

13.

Saviola/Italy/2021 [62]

CR

1

CSS1: 1

ARID1A : 1

DNA

-

Heterozygous

Autosomal Dominant

NGS and PCR

14.

Lacour/New Orleans/2018 [63]

CR

1

MFDM:1 CFM: 1

EFTUD2 : 1

DNA

-

Heterozygous

Autosomal Dominant

WES

15.

Bragagnolo/Brazil/2016 [64]

CR

1

WHS: 1

-

Chromosome

(4p-deletion syndrome)

Deletion

Heterozygous

Autosomal Dominant

FISH, CGH, PCR

16.

Knapp/New Zealand/20201 [43]

CR

1

MGORS: 1

CDT1 : 1

RNA

Deletion

Heterozygous

Autosomal Recessive

PCR

17.

Liu/China/2021 [15]

CR

1

TCS: 1

TCOF1 : 1

DNA

Nonsense Mutation

Heterozygous

Autosomal Dominant

WES

Sureselect XT Target Enrichment system, Microarray, Sanger Sequencing

18.

Maya/Israel/2020 [65]

CR

1

CCA: 1

-

Chromosome

Deletion

Heterozygous

Autosomal Dominant

MicroArray

19.

Okamoto/Japan/2022 [21]

CS

2

-

MARS1 : 2

RNA : 2

Missense : 2

Heterozygous

Autosomal Recessive

WES

Sanger sequencing

20.

Brophy/Iowa USA/2013 [66]

CS

3

BOR: 3

EYA1 : 1

Chromosome: 3

Deletion : 2 Duplication:1

Heterozygous

Autosomal Dominant

Array Based CGH

21.

Bukowska/Poland/2020 [22]

CS

3

TCS : 3

TCOF1 : 3

DNA : 3

Duplication: 2

Deletion: 1

Heterozygous

Autosomal Dominant

Sanger Sequencing

22.

Tingaud- Sequeira/France/2021 [67]

CS

2

Goldenhar Syndrome: 2

CFM: 1

EYA3 : 2

DNA : 2

Missense : 2

Heterozygous

Autosomal Dominant

WES

23.

Kim/South Korea/2017 [68]

CS

2

-

CDT1 : 2

DNA : 2

Duplication: 2

Heterozygous

Autosomal Recessive

Sanger sequencing

24.

Jung/New York/2020 [34]

CS

4

-

FANCB variant: 4

DNA : 4

Large deletion: 1

Insertion & Deletion: 1

Missense:1

Nonsense: 1

Heterozygous

X-linked Recessive

RT-PCR

25.

Su/Taiwan/2007 [14]

CS

5

OAVS: 4

TCS: 1

CFM: 3

TCOF1 : 5

DNA : 4

Silent mutation: 2

Heterozygous

Autosomal Dominant

PCR

26.

Chen/China/2017 [17]

CS

19

TCS: 19

TCOF1 : 19

DNA : 18

Deletion: 11

Insertion: 1

Missense: 2

Heterozygous

Autosomal Dominant

PCR, Sanger Technique

27.

Royer- Bertrand/Switzerland/ 2015 [20]

CS

3

EVPLS: 3

HSPA9 : 3

DNA : 3

-

Homozygous

Autosomal Recessive

Sanger sequencing

28.

Zhang/China/2016 [69]

CH

984

984 CFM, unspecifie d

ART3 : 1; ASB18 : 1; C15orf39 : 1; CCDC33 : 1; CSK : 1; CSPG4 : 1; CYP11A1 : 1; DBF4B : 1; FMNL1 : 1; FRMD4A : 1; FRMD6 : 1; GATA3 : 1; GFAP : 1; GJC1: 1; GOLGA6A : 1; HEXIM2 : 1; IGHMBP2 : 1; ISLR : 1; ISLR2 : 1; KLF12 : 1; LOC10099651 5 : 1; MYEOV: 1; NPAP1 : 1; PLCD3 : 1; PML : 1; PRKCE : 1; SCARB2 : 1; SHROOM3 : 1; SOCS5 : 1; SRBD1 : 1; TMEM247 : 1

-

Missense: 29

Frameshift: 2

Heterozygous

Autosomal Dominant

PCR

29.

Monks/United Kingdom/2010 [70]

CC

12

-

(isolated microtia)

SIX2 : 3

HOXA2 : 2

DNA : 5

-

Heterozygous

SIX2 : Autosomal Dominant

HOXA2 : Autosomal Recessive

MassARRAY Assay

30.

Zhang/China/2009 [31]

CC

121

-

(isolated microtia)

Gsc Exon 2 : 6

Gsc Exon 3 : 2

BMP 5 maternal peptide : 1

DNA: 8

RNA: 1

Silent mutation: 6

Missense: 3

Heterozygous

Gsc Exon 2&3: Autosomal Recessive

BMP 5 maternal peptide : Autosomal Dominant

Direct sequencing

  1. Abbreviations: TCS, MIM#154500 Treacher-Collins Syndrome, CFM, MIM#164210 Craniofacial Microsomia, MFDM, MIM#610536 Mandibulofacial Dysostosis with Microcephaly, OAVS, MIM#164210 Oculo-auriculo-vertebral spectrum, MGORS1, MIM#224690 Meier- Gorlin Syndrome, WHS, MIM#194190 Wolf-Hirschhorn Syndrome, BOR, MIM#113650 Branchio-oto-renal syndrome, EVPLS, MIM#616854 Even-plus Syndrome, WITKOS, MIM#613406 15q24 deletion Syndrome / Witteveen Kolk Syndrome, FRASRS1, MIM#219000 Fraser syndrome, MIM 308750 Kalmann Syndrome, CSS1, MIM#135900 Coffin-Siris Syndrome. CCA, MIM#121050 Beals Syndrome, CR Case report, CS Case series, CH Cohort, CC Case-control