Noncoding Variations in the Gene Encoding Ceramide Synthase 6 are Associated with Type 2 Diabetes in a Large...

Area of Science:

• Genetics
• Metabolic Diseases
• Indigenous Health

Background:

• Type 2 diabetes (T2D) significantly impacts Indigenous Australian populations.
• Previous linkage analysis identified a T2D susceptibility locus on chromosome 2q24 in an Indigenous Australian pedigree.

Purpose of the Study:

• To fine-map the T2D locus on chromosome 2q24.
• To identify specific genetic variants associated with T2D in Indigenous Australians.
• To investigate the role of the ceramide synthase 6 (CERS6) gene in T2D pathogenesis.

Main Methods:

• Fine mapping of the 2q24 region using single nucleotide polymorphisms (SNPs).
• Association analysis of identified SNPs with T2D in an Indigenous Australian pedigree.
• Replication of association findings in an independent cohort of Indigenous Australian T2D cases and controls.

Main Results:

• Identified three SNPs (rs3845724, rs4668106, rs529002) significantly associated with T2D or plasma glucose levels.
• These associated SNPs are located within the CERS6 gene.
• The associations were successfully replicated in an independent cohort.

Conclusions:

• The CERS6 gene is a potential regulator of ceramide synthesis and a novel T2D susceptibility gene in Indigenous Australians.
• These findings contribute to understanding the genetic basis of T2D in this population.
• Further research into CERS6 function may reveal new therapeutic targets for T2D.