Clinical features and analysis of deafness genes in 2 patients from a Chinese family with MYH9 disorder

Yinyi CHEN; Ying'ai ZHANG; Xin GAO; Mei CHEN; Shunlan WANG; Shufang ZHANG

doi:10.16016/j.1000-5404.201812098

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Clinical features and analysis of deafness genes in 2 patients from a Chinese family with MYH9 disorder

Clinical Medicine | 更新时间：2026-01-09

- Clinical features and analysis of deafness genes in 2 patients from a Chinese family with MYH9 disorder
- Journal of Third Military Medical University Vol. 41, Issue 11, Pages: 1083-1089(2019)
- 作者机构：
  
  570208 海口，中南大学湘雅医学院附属海口医院中心实验室
- 作者简介：
- 基金信息：
  
  the Major Science and Technology Program of Hainan Province(ZDKJ2017007);the Scientific Research Project of Hainan Health and Family Planning(18A200137)
- DOI：10.16016/j.1000-5404.201812098
  CLC： R394.5;R596.1;R764.43
- Received：12 December 2018，
  
  Revised：2019-03-09，
  
  Published：15 June 2019
- 稿件说明：
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Yinyi CHEN, Ying'ai ZHANG, Xin GAO, et al. Clinical features and analysis of deafness genes in 2 patients from a Chinese family with MYH9 disorder[J]. Journal of Third Military Medical University, 2019, 41(11): 1083-1089.
DOI：

Yinyi CHEN, Ying'ai ZHANG, Xin GAO, et al. Clinical features and analysis of deafness genes in 2 patients from a Chinese family with MYH9 disorder[J]. Journal of Third Military Medical University, 2019, 41(11): 1083-1089. DOI： 10.16016/j.1000-5404.201812098.

摘要

目的

分析一个MYH9综合征家系中2例耳聋患者的表型特征，进行候选耳聋基因的突变筛查，明确该家系耳聋表型的基因突变位点。

方法

对家系进行详细的病史问诊及体格检查、血常规及生化检查、听力学检测、外周血涂片瑞-吉染色及MYH9蛋白质免疫荧光检测；抽提2例患者外周血基因组DNA，使用全外显子组测序技术对包括所有已知的100多个耳聋相关基因进行筛查并对可疑突变进行Sanger测序验证。

结果

该家系所有患者有巨大血小板、血小板减少和中性粒细胞包涵体三联征，系谱分析符合常染色体显性遗传特征。本研究2例耳聋患者还伴有贫血、高脂血症和转氨酶升高；耳聋表现为语后性、迟发型和渐进性听力下降，以中高频听力损失为主的感音神经性耳聋。全外显子组测序技术检测到

MYH9

基因致病突变位点：c.G4546C:p.V1516L，未发现其他已知遗传性耳聋基因的致病突变。

结论

该家系2例患者的耳聋表型可能与

MYH9

致病突变p.V1516L相关。

Abstract

Objective

To investigate the clinical features of 2 deafness patients from a family with MYH9 disorder

and search the candidate genes related to deafness for mutation sites in this family.

Methods

Their detailed medical histories were surveyed. Physical examination

routine blood test

biochemical test

audiological test

and Wright-Giemsa staining and immunofluorescence assay of MYH9 protein in the peripheral blood smears were performed. Genomic DNA was extracted from the peripheral blood samples of 2 patients. More than 100 known genes associated with deafness were sequenced by whole exome sequencing

and the results were confirmed by Sanger sequencing.

Results

All affected members in this family had the typical triad of giant platelets

thrombocytopenia and neutrophil inclusion bodies

and the pedigree analysis revealed autosomal dominant inheritance. In this study

the 2 deaf patients also suffered from anemia

hyperlipidemia and elevated levels of transaminase. The features of their deafness were postlingual deafness

late-onset and progressive hearing loss

and medium and high frequency dominant sensorineural hearing loss. Whole exome sequencing indicated that the pathogenic mutation site of

MYH9

gene was c.G4546C:p.V1516L

and no other pathogenic mutations of known genes involved in deafness were found.

Conclusion

The deafness phenotype of the 2 patients in this family may be related to the

MYH9

pathogenic mutation p.V1516L.

关键词

Keywords

references

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