Targeted ultra-deep sequencing of a South African Bantu-speaking cohort to comprehensively map and characterize common and novel variants in 65 pharmacologically-related genes.


Journal

Pharmacogenetics and genomics
ISSN: 1744-6880
Titre abrégé: Pharmacogenet Genomics
Pays: United States
ID NLM: 101231005

Informations de publication

Date de publication:
09 2019
Historique:
pubmed: 5 6 2019
medline: 25 4 2020
entrez: 5 6 2019
Statut: ppublish

Résumé

African populations are characterised by high genetic diversity, which provides opportunities for discovering and elucidating novel variants of clinical importance, especially those affecting therapeutic outcome. Significantly more knowledge is however needed before such populations can take full advantage of the advances in precision medicine. Coupled with the need to concisely map and better understand the pharmacological implications of genetic diversity in populations of sub-Sharan African ancestry, the aim of this study was to identify and characterize known and novel variants present within 65 important absorption, distribution, metabolism and excretion genes. Targeted ultra-deep next-generation sequencing was used to screen a cohort of 40 South African individuals of Bantu ancestry. We identified a total of 1662 variants of which 129 are novel. Moreover, out of the 1662 variants 22 represent potential loss-of-function variants. A high level of allele frequency differentiation was observed for variants identified in this study when compared with other populations. Notably, on the basis of prior studies, many appear to be pharmacologically important in the pharmacokinetics of a broad range of drugs, including antiretrovirals, chemotherapeutic drugs, antiepileptics, antidepressants, and anticoagulants. An in-depth analysis was undertaken to interrogate the pharmacogenetic implications of this genetic diversity. Despite the new insights gained from this study, the work illustrates that a more comprehensive understanding of population-specific differences is needed to facilitate the development of pharmacogenetic-based interventions for optimal drug therapy in patients of African ancestry.

Sections du résumé

BACKGROUND
African populations are characterised by high genetic diversity, which provides opportunities for discovering and elucidating novel variants of clinical importance, especially those affecting therapeutic outcome. Significantly more knowledge is however needed before such populations can take full advantage of the advances in precision medicine. Coupled with the need to concisely map and better understand the pharmacological implications of genetic diversity in populations of sub-Sharan African ancestry, the aim of this study was to identify and characterize known and novel variants present within 65 important absorption, distribution, metabolism and excretion genes.
PATIENTS AND METHODS
Targeted ultra-deep next-generation sequencing was used to screen a cohort of 40 South African individuals of Bantu ancestry.
RESULTS
We identified a total of 1662 variants of which 129 are novel. Moreover, out of the 1662 variants 22 represent potential loss-of-function variants. A high level of allele frequency differentiation was observed for variants identified in this study when compared with other populations. Notably, on the basis of prior studies, many appear to be pharmacologically important in the pharmacokinetics of a broad range of drugs, including antiretrovirals, chemotherapeutic drugs, antiepileptics, antidepressants, and anticoagulants. An in-depth analysis was undertaken to interrogate the pharmacogenetic implications of this genetic diversity.
CONCLUSION
Despite the new insights gained from this study, the work illustrates that a more comprehensive understanding of population-specific differences is needed to facilitate the development of pharmacogenetic-based interventions for optimal drug therapy in patients of African ancestry.

Identifiants

pubmed: 31162291
doi: 10.1097/FPC.0000000000000380
pmc: PMC6675649
mid: NIHMS1528518
doi:

Types de publication

Journal Article Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't

Langues

eng

Sous-ensembles de citation

IM

Pagination

167-178

Subventions

Organisme : NHGRI NIH HHS
ID : U54 HG006938
Pays : United States

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Auteurs

Sibongile Tshabalala (S)

Division of Human Genetics, National Health Laboratory Service, School of Pathology, Faculty of Health Sciences.
Sydney Brenner Institute for Molecular Bioscience (SBIMB), Faculty of Health Sciences.
CSIR Biosciences Unit, Pretoria, South Africa.

Ananyo Choudhury (A)

Sydney Brenner Institute for Molecular Bioscience (SBIMB), Faculty of Health Sciences.

Natasha Beeton-Kempen (N)

CSIR Biosciences Unit, Pretoria, South Africa.

Neil Martinson (N)

Perinatal HIV Research Unit, Baragwanath Hospital and Faculty of Health Sciences.
Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg.

Michèle Ramsay (M)

Division of Human Genetics, National Health Laboratory Service, School of Pathology, Faculty of Health Sciences.
Sydney Brenner Institute for Molecular Bioscience (SBIMB), Faculty of Health Sciences.

Dalu Mancama (D)

CSIR Biosciences Unit, Pretoria, South Africa.

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Classifications MeSH