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GWAS Study

Genome-wide association study identifies novel type II diabetes risk loci in Jordan subpopulations.

Dajani R, Li J, Wei Z et al.

28828242 PubMed ID
GWAS Study Type
5193 Participants
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Chapter I

Publication Details

Comprehensive information about this research publication

Authors

DR
Dajani R
LJ
Li J
WZ
Wei Z
MM
March ME
XQ
Xia Q
KY
Khader Y
HN
Hakooz N
FR
Fatahallah R
EM
El-Khateeb M
AA
Arafat A
ST
Saleh T
DA
Dajani AR
AZ
Al-Abbadi Z
AQ
Abdul Qader M
SA
Shiyab AH
BA
Bateiha A
AK
Ajlouni K
HH
Hakonarson H
Chapter II

Abstract

Summary of the research findings

The prevalence of Type II Diabetes (T2D) has been increasing and has become a disease of significant public health burden in Jordan. None of the previous genome-wide association studies (GWAS) have specifically investigated the Middle East populations. The Circassian and Chechen communities in Jordan represent unique populations that are genetically distinct from the Arab population and other populations in the Caucasus. Prevalence of T2D is very high in both the Circassian and Chechen communities in Jordan despite low obesity prevalence. We conducted GWAS on T2D in these two populations and further performed meta-analysis of the results. We identified a novel T2D locus at chr20p12.2 at genome-wide significance (rs6134031, P = 1.12 × 10-8) and we replicated the results in the Wellcome Trust Case Control Consortium (WTCCC) dataset. Another locus at chr12q24.31 is associated with T2D at suggestive significance level (top SNP rs4758690, P = 4.20 × 10-5) and it is a robust eQTL for the gene, MLXIP (P = 1.10 × 10-14), and is significantly associated with methylation level in MLXIP, the functions of which involves cellular glucose response. Therefore, in this first GWAS of T2D in Jordan subpopulations, we identified novel and unique susceptibility loci which may help inform the genetic underpinnings of T2D in other populations.

67 Greater Middle Eastern ancestry cases, 214 Greater Middle Eastern ancestry controls

Chapter III

Study Statistics

Key metrics and study information

5193
Total Participants
GWAS
Study Type
Yes
Replicated
1,952 European ancestry cases, 2,960 European ancestry controls
Replication Participants
Greater Middle Eastern (Middle Eastern, North African or Persian), European
Ancestry
Jordan
Recruitment Country
Chapter IV

Analysis

Comprehensive review of health and genetic findings

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Analysis In Progress

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