Transthyretin (TTR) pV142I (rs76992529-A) is one of the 113 variants in the human TTR gene associated with systemic amyloidosis. It results from a G to A transition at a CG dinucleotide in the codon for amino acid 122 of the mature protein (TTR V122I). The allele frequency is 0.0173 in African Americans

Alexander, Alice A

Buxbaum, Joel N.

Garvey, W. T

Jacobson, Daniel R

Kalidi, Issa

Modiano, David

Sirima, Sodiomon B

Tagoe, Clement

Tishkoff, Sara

Toure, Amadou

Williams, Scott M

Molecular Genetics & Genomic Medicine

English

PubMed

Background Transthyretin (TTR) pV142I (rs76992529-A) is one of the 113 variants in the human TTR gene associated with systemic amyloidosis. It results from a G to A transition at a CG dinucleotide in the codon for amino acid 122 of the mature protein (TTR V122I). The allele frequency is 0.0173 in African Americans. Methods PCR-based assays to genotype 2767 DNA samples obtained from participants in genetic studies from various African populations supplemented with sequencing data from 529 samples within the 1000 Genomes Project. Results The rs76992529-A variant allele was most prevalent (allele frequency 0.0253) in the contiguous West African countries of Sierra Leone, Guinea, Ivory Coast, Burkina Faso, Ghana, and Nigeria. In other African countries, the mean allele frequency was 0.011. Conclusions Our data are consistent with a small number of founder carriers of the amyloidogenic TTR V122I (p.Val142Ile) allele in southern West Africa, with no apparent advantage or disadvantage of an allele carrying newborn reaching adulthood. In U.S. African Americans, the allele represents a significant risk for congestive heart failure late in life. If clinical penetrance is similar in African countries with high allele frequencies, then cardiac amyloidosis could also represent a significant cause of heart disease in the elderly in those populations

Garvey, W T

Buxbaum, Joel M

Dartmouth Digital Commons (Dartmouth College)

The prevalence and distribution of the amyloidogenic transthyretin (TTR) V122I allele in Africa

MODIANO, David

Archivio della ricerca- Università di Roma La Sapienza

https://iris.uniroma1.it/bitstream/11573/956434/1/Jacobson_prevalence_2016.pdf

The prevalence and distribution of the amyloidogenic transthyretin (TTR) V122I allele in Africa

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Dartmouth Digital Commons (Dartmouth College)

Archivio della ricerca- Università di Roma La Sapienza