Repository logo
 

ZRANB3 is an African-specific type 2 diabetes locus associated with beta-cell mass and insulin response.

Published version
Peer-reviewed

Type

Article

Change log

Authors

Adeyemo, Adebowale A  ORCID logo  https://orcid.org/0000-0002-3105-3231
Zaghloul, Norann A 
Doumatey, Ayo P 
Leitch, Carmen C 

Abstract

Genome analysis of diverse human populations has contributed to the identification of novel genomic loci for diseases of major clinical and public health impact. Here, we report a genome-wide analysis of type 2 diabetes (T2D) in sub-Saharan Africans, an understudied ancestral group. We analyze ~18 million autosomal SNPs in 5,231 individuals from Nigeria, Ghana and Kenya. We identify a previously-unreported genome-wide significant locus: ZRANB3 (Zinc Finger RANBP2-Type Containing 3, lead SNP p = 2.831 × 10-9). Knockdown or genomic knockout of the zebrafish ortholog results in reduction in pancreatic β-cell number which we demonstrate to be due to increased apoptosis in islets. siRNA transfection of murine Zranb3 in MIN6 β-cells results in impaired insulin secretion in response to high glucose, implicating Zranb3 in β-cell functional response to high glucose conditions. We also show transferability in our study of 32 established T2D loci. Our findings advance understanding of the genetics of T2D in non-European ancestry populations.

Description

Keywords

Africa, Northern, Animals, Apoptosis, Base Sequence, Blood Glucose, CRISPR-Cas Systems, DNA Helicases, Diabetes Mellitus, Type 2, Disease Models, Animal, Female, Gene Editing, Gene Knockout Techniques, Genetic Association Studies, Genetic Predisposition to Disease, Genotype, Ghana, Glucose, Homozygote, Humans, Insulin, Insulin-Secreting Cells, Kenya, Male, Mice, Middle Aged, Mutation, Nigeria, Polymorphism, Single Nucleotide, RNA, Small Interfering, Transcription Factor 7-Like 2 Protein, Transcriptome, Zebrafish

Journal Title

Nat Commun

Conference Name

Journal ISSN

2041-1723
2041-1723

Volume Title

10

Publisher

Springer Science and Business Media LLC