Expressive

rs10405773 (ZNF682): Atherosclerosis Marker

Key takeaways

  • rs10405773 is near ZNF682 and was studied in a cIMT genome-wide association study in sub-Saharan Africans.
  • Carotid intima-media thickness (cIMT) is a non-invasive ultrasound measure used as a research proxy for atherosclerosis.
  • The source study included 7,894 adults across four African countries, addressing a significant gap in cardiovascular genetic research.
  • Genetic studies of cIMT explain only about 1.1% of its variance, even though heritability estimates from family and twin studies reach 20-65%.
  • Evidence for this variant is preliminary and comes from a single study without published replication in the provided source text.

Key takeaways

  • rs10405773 is a genetic variant near or within ZNF682 (Zinc Finger Protein 682) that was studied in relation to carotid intima-media thickness (cIMT), a non-invasive ultrasound measurement used as a research proxy for atherosclerosis.
  • Evidence comes from the AWI-Gen cohort study, one of the largest genome-wide association studies (GWAS) focused on sub-Saharan African populations (n=7,894 adults across four countries).
  • Genetic variants identified to date collectively explain only about 1.1% of cIMT variance, even though family and twin studies estimate cIMT heritability at 20% to 65%.
  • Evidence for this variant is preliminary and comes from a single study; no independent replication data were available in the provided source text.
  • The AWI-Gen study addressed a major gap in cardiovascular genetics research, which has historically focused almost entirely on European-ancestry populations.

What the research says The AWI-Gen cohort study examined cIMT in 7,894 unrelated adults (3,963 women, 3,931 men) aged 40 to 60 years across Burkina Faso, Ghana, Kenya, and South Africa, using the H3Africa SNP Array for genotyping. Carotid intima-media thickness, measured by ultrasound, served as a surrogate marker for generalized atherosclerosis risk; heritability of cIMT from family and twin studies is estimated at 20% to 65%, though GWAS findings in aggregate explain only 1.1% of cIMT variance. The study noted that haplotype blocks in African populations average approximately 8.8 kb compared to 20.7 kb in Europeans, a structural difference that can assist in pinpointing causal variants more precisely.

Reported associations

  • Carotid intima-media thickness (cIMT): rs10405773, near or within ZNF682 (Zinc Finger Protein 682), was examined in the context of the AWI-Gen cIMT genome-wide association study in sub-Saharan Africans (n=7,894, ages 40-60 years). Specific effect size and significance statistics for this variant were not included in the provided study excerpt.

Evidence quality Evidence for rs10405773 comes from a single genome-wide association study conducted in sub-Saharan African populations (n=7,894 adults aged 40 to 60 years, four countries: Burkina Faso, Ghana, Kenya, and South Africa). This represents a notable strength given that the large majority of prior cIMT GWAS work has been performed in European-ancestry cohorts; the study is among only a small number of large GWAS focused on sub-Saharan Africans resident in Africa. The H3Africa SNP Array was used for genotyping, and cIMT was measured by ultrasound as a validated surrogate endpoint for atherosclerosis. However, specific association statistics (p-value, effect size, or odds ratio) for rs10405773 were not available in the provided study text, and no independent replication is described for this locus. The finding should be treated as preliminary.

Lifestyle considerations No lifestyle considerations on file for this variant.

Frequently asked questions

What is the ZNF682 gene?

ZNF682 stands for Zinc Finger Protein 682, a gene that encodes a type of regulatory protein. Its specific biological role in cardiovascular disease was not described in detail in the available study text.

What is carotid intima-media thickness and why is it used in genetic studies?

Carotid intima-media thickness (cIMT) is the combined thickness of the innermost two layers of the carotid artery wall, measured non-invasively by ultrasound. It is used as a surrogate marker for generalized atherosclerosis and is partly heritable; family and twin studies estimate its heritability at 20% to 65%.

Is rs10405773 linked to heart disease?

rs10405773 was studied in relation to carotid intima-media thickness, which is a research marker for atherosclerosis rather than a direct measure of heart disease. Specific association statistics for this variant were not fully available in the provided study text.

Was this variant studied in African populations?

Yes. The source study focused specifically on sub-Saharan African populations across Burkina Faso, Ghana, Kenya, and South Africa in a cohort of 7,894 adults. Most prior cIMT genetic research has been conducted in European-ancestry populations, making this one of the few large GWAS in this ancestry group.

How strong is the evidence for rs10405773?

Evidence is preliminary, coming from a single genome-wide association study in sub-Saharan Africans. Replication in independent cohorts was not reported in the available text, and specific p-values or effect sizes for this variant were not included in the provided excerpt.