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Metabolic Brain Disease

, Volume 33, Issue 6, pp 2051–2057 | Cite as

Clinical and molecular characteristics of 11 Chinese probands with GM1 gangliosidosis

  • Yuyu Feng
  • Yonglan Huang
  • Xiaoyuan Zhao
  • Huiying Sheng
  • Yi Feng
  • Wen Zhang
  • Li Liu
Original Article

Abstract

GM1 gangliosidosis is an autosomal recessive lysosomal storage disease caused by the deficiency of β-galactosidase activity, precisely due to mutations in the GLB1 gene. To explore the clinical and molecular characteristics of GM1 gangliosidosis patients from China, GLB1 gene were analyzed in 11 probands with GM1 gangliosidosis by exploiting direct Sanger-sequencing. Among them, five patients were classified as the infantile type and the remaining six as the late-infantile or juvenile type. In these probands, eight novel mutations p.Y50N, p.Y237C, p.S267F, p.G453R, p.K578 N, c.618delC, c.475_478delGACA and c.1979_1980insG have been identified. Among them, three novel missense mutations p.Y50N, p.S267F and p.G453R were transiently transfected in COS-7 cells by plasmid system for functional verification. In vitro GLB1 activities carrying the aforesaid missense mutants p.Y50N, p.S267F and p.G453R were 0.11%, 0 and 0.55% of wild-type, respectively. Mutation c.495_497delTCT and p.S149F accounted for 22.7 and 13.6% of the mutant alleles, respectively. Our results expand the spectrum of GLB1 gene, provide new insights into the clinical and molecular characteristics of GM1 gangliosidosis in China.

Keywords

GM1 gangliosidosis GLB1 gene β-galactosidase Clinical and molecular characteristics 

Notes

Acknowledgments

We gratefully acknowledge the patients and their families for participating in this study. This study was supported by Research Grants from Guangdong Provincial Bureau of Science and Technology (2014A020212016).

Compliance with ethical standards

Conflict of interest

There is no conflict of interest.

Supplementary material

11011_2018_315_MOESM1_ESM.docx (14 kb)
Table S1 (DOCX 14 kb)
11011_2018_315_MOESM2_ESM.doc (28 kb)
Table S2 (DOC 28 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Genetics and EndocrinologyGuangzhou Women and Children’s Medical CenterGuangzhouChina

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