Home | About us | Editorial board | Search | Ahead of print | Current issue | Archives | Submit article | Instructions | Subscribe | Contacts | Advertise | Login 
 
Search Article 
  
Advanced search 
  Users Online: 120 Home Print this page Email this page Small font sizeDefault font sizeIncrease font size  

 
Table of Contents
LETTER TO EDITOR
Year : 2011  |  Volume : 15  |  Issue : 1  |  Page : 60-61

Sequencing MODY1-6 genes in Uyghur Early-onset diabetes pedigree


1 Occupational and Environmental Health Department, School of Public Health, Xinjiang Medical University, Xinyi Road, 393, Urumqi. Xinjiang Province 830011, China
2 Department of Endocrinology, First Affiliated Hospital of Xinjiang Medical University. Urumqi. Xinjiang Province 830011, China

Date of Web Publication12-Mar-2011

Correspondence Address:
Patamu Mohemaiti
Occupational and Environmental Health Department, School of Public Health, Xinjiang Medical University, Xinyi Road 393, Urumqi, Xinjiang Province 830054
China
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/2230-8210.77591

Rights and Permissions

How to cite this article:
Nuli R, Mohemaiti P, Yimamu Y, Taxitiemuer A. Sequencing MODY1-6 genes in Uyghur Early-onset diabetes pedigree. Indian J Endocr Metab 2011;15:60-1

How to cite this URL:
Nuli R, Mohemaiti P, Yimamu Y, Taxitiemuer A. Sequencing MODY1-6 genes in Uyghur Early-onset diabetes pedigree. Indian J Endocr Metab [serial online] 2011 [cited 2020 Sep 24];15:60-1. Available from: http://www.ijem.in/text.asp?2011/15/1/60/77591

Sir,

Maturity-onset diabetes of the young (MODY) is a monogenic form of diabetes mellitus characterized by autosomal dominant inheritance, early age of onset, and pancreatic beta cell dysfunction. [1] With advancement in genomic technology, at least 11 distinct MODY genes have been identified to date and more are believed to exist.

The prevalence of Type 2 diabetes was 8% in China and 8.16% in the Uyghur population; [2] the cause of high prevalence is unknown. There is no prior study of the molecular genetics of early-onset Type 2 diabetes in Xinjiang and there is no report on mutations in MODY genes in the Uyghur ethnic population. We had undertaken the study to screen for mutations and polymorphisms in six known MODY genes in a Uyghur probable MODY family.

We collected two Uyghur early-onset diabetes pedigrees from Kashikar city of Xinjiang Uyghur Autonomous Region. We clinically diagnosed one pedigree as a probable MODY family according to the MODY criteria. [3] Two cases (Participants II.1 and III.2) from a family were involved in this research with their informed consents [Figure 1]. Genomic DNA was isolated. All exons and flanking intron regions of HNF-4α, GCK, HNF-1α, IPF-1, HNF-1β, and NEUROD1 genes were amplified from a genomic DNA sample by polymerase chain reaction (PCR). All sequences were analyzed and compared with the reference sequence from NCBI with the Lasergene software (DNASTAR, Wisconsin, USA). Changes in the sequence were checked against published polymorphisms and mutations from the Human Genome Variation Society (HGVS, http://www.HGVS.org).
Figure 1: Arrow identifies the proband. Squares denote male family members, and circles denote female family members. Solid symbols represent subjects with Type 2 diabetes, open symbols represent nondiabetic individuals

Click here to view


The six MODY genes represent an excellent candidate gene set for identification of genetic variation in the MODY family. Seventeen sequence variations were identified and none of them were classified as pathogenic mutation. Sequence variants of HNF-1α gene were relatively more common [Figure 2]. HNF-1α exon7 p.Gln497Gln and NEUROD1 Exon1 c.164G>A were novel variations. Others were previously described common polymorphisms. No pathogenic mutations or polymorphisms were found in GCK.
Figure 2: Location of variations within the 10 exons and introns of HNF-1ƒ¿ identified in this study

Click here to view


A Chinese study suggested that the S487N, I27L variants might be associated with Type 2 diabetes mellitus (DM) in Chinese subjects, but these variants' significance in the development of Type 2 DM needs to be further investigated. [4] In this study, we also sequenced the S487N, I27L variants of the HNF-1α gene. A recent study suggested that variants of MODY genes can enhance the risk of susceptibility to Type 2 DM. [5]

In summary, this is the first report in which six known MODY genes were screened for mutations in the Uyghur ethnic group. Moreover, in the thorough analysis of the six MODY genes we did not identify any HNF-1α risk haplotype in this family, while HNF-4α, GCK, HNF-1ί, IPF-1and NEUROD1 apparently failed to contribute to the etiology of early-onset diabetes in this Uyghur family, providing further support for the high heterogeneity of this disease.

This is the first step of our researches on the MODY genes in a Uyghur probable MODY family. These variations which were identified in this study may indicate a relatively higher susceptibility to MODY or Type 2 DM in the Uyghurs.


   Acknowledgments Top


We are indebted to all the patients and family members for their generous participation in this work. We also gratefully acknowledge the support of the National Science Foundation of China (NSFC, Grant number 30860114).

 
   References Top

1.Vaxillaire M, Froguel P. Monogenic diabetes in the young, pharmacogenetics and relevance to multifactorial forms of type 2 diabetes. Endocr Rev 2008;29:254-64.  Back to cited text no. 1
[PUBMED]  [FULLTEXT]  
2.Tao Y, Mao X, Xie Z, Ran X, Liu X, Wang Y, et al. The prevalence of type 2 diabetes and hypertension in Uygur and Kazak populations. Cardiovasc Toxicol 2008;8:155-9.  Back to cited text no. 2
[PUBMED]  [FULLTEXT]  
3.Ellard S, Bellanne-Chantelot C, Hattersly AT. Best practice guideline for the molecular genetics diagnosis of maturity-onset diabetes of the young. Diabetologia 2008;51:546-53.  Back to cited text no. 3
    
4.Ng MC, Cockburn BN, Lindner TH, Yeung VT, Chow CC, So WY, et al. Molecular genetics of diabetes mellitus in Chinese subjects: Identification of mutations in glucokinase and hepatocyte nuclear factor-1a genes in patients with early-onset type 2 diabetes mellitus/MODY. Diabet Med 1999;16:956-63.   Back to cited text no. 4
[PUBMED]  [FULLTEXT]  
5.Holmkvist J, Almgren P, Lyssenko V, Lindgren CM, Eriksson KF, Isomaa B, et al. Common variants in maturity-onset diabetes of the young genes and future risk of type 2 diabetes. Diabetes 2008;57:1738-44.  Back to cited text no. 5
[PUBMED]    


    Figures

  [Figure 1], [Figure 2]



 

Top
 
  Search
 
    Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
    Access Statistics
    Email Alert *
    Add to My List *
* Registration required (free)  

 
  In this article
    Acknowledgments
    References
    Article Figures

 Article Access Statistics
    Viewed1943    
    Printed65    
    Emailed0    
    PDF Downloaded262    
    Comments [Add]    

Recommend this journal