Candidate malaria susceptibility/protective SNPs in hospital and population-based studies: the effect of sub-structuring
Abstract Background Populations of East Africa including Sudan, exhibit some of the highest indices of genetic diversity in the continent and worldwide. The current study aims to address the possible impact of population structure and population stratification on the outcome of case-control associat...
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ftdoajarticles:oai:doaj.org/article:be400a2edd734801a0f15e622013e263 2023-05-15T15:15:08+02:00 Candidate malaria susceptibility/protective SNPs in hospital and population-based studies: the effect of sub-structuring Rockett Kirk A Mohamed Hiba S Elzein Abier M Hussein Aymen A Eid Nahid A Kwiatkowski Dominic P Ibrahim Muntaser E 2010-05-01T00:00:00Z https://doi.org/10.1186/1475-2875-9-119 https://doaj.org/article/be400a2edd734801a0f15e622013e263 EN eng BMC http://www.malariajournal.com/content/9/1/119 https://doaj.org/toc/1475-2875 doi:10.1186/1475-2875-9-119 1475-2875 https://doaj.org/article/be400a2edd734801a0f15e622013e263 Malaria Journal, Vol 9, Iss 1, p 119 (2010) Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 article 2010 ftdoajarticles https://doi.org/10.1186/1475-2875-9-119 2022-12-31T08:06:51Z Abstract Background Populations of East Africa including Sudan, exhibit some of the highest indices of genetic diversity in the continent and worldwide. The current study aims to address the possible impact of population structure and population stratification on the outcome of case-control association-analysis of malaria candidate-genes in different Sudanese populations, where the pronounced genetic heterogeneity becomes a source of concern for the potential effect on the studies outcome. Methods A total of 72 SNPs were genotyped using the Sequenom ® iPLEX Gold assay in 449 DNA samples that included; cases and controls from two village populations, malaria patients and out-patients from the area of Sinnar and additional controls consisting of healthy Nilo-Saharan speaking individuals. The population substructure was estimated using the Structure 2.2 programme. Results & Discussion The Hardy-Weinberg Equilibrium values were generally within expectation in Hausa and Massalit. However, in the Sinnar area there was a notable excess of homozygosity, which was attributed to the Whalund effect arising from population amalgamation within the sample. The programme STRUCTURE revealed a division of both Hausa and Massalit into two substructures with the partition in Hausa more pronounced than in Massalit; In Sinnar there was no defined substructure. More than 25 of the 72 SNPs assayed were informative in all areas. Some important SNPs were not differentially distributed between malaria cases and controls, including SNPs in CD36 and NOS2 . A number of SNPs showed significant p-values for differences in distribution of genotypes between cases and controls including: rs1805015 (in IL4R1 ) ( P = 0.001), rs17047661 (in CR1 ) ( P = 0.02) and rs1800750 (TNF-376) ( P = 0.01) in the hospital samples; rs1050828 ( G6PD+202 ) ( P = 0.02) and rs1800896 ( IL10-1082 ) ( P = 0.04) in Massalit and rs2243250 ( IL4 -589) ( P = 0.04) in Hausa. Conclusions The difference in population structure partly accounts for some of these ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Malaria Journal 9 1 119 |
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Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
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Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 Rockett Kirk A Mohamed Hiba S Elzein Abier M Hussein Aymen A Eid Nahid A Kwiatkowski Dominic P Ibrahim Muntaser E Candidate malaria susceptibility/protective SNPs in hospital and population-based studies: the effect of sub-structuring |
topic_facet |
Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
description |
Abstract Background Populations of East Africa including Sudan, exhibit some of the highest indices of genetic diversity in the continent and worldwide. The current study aims to address the possible impact of population structure and population stratification on the outcome of case-control association-analysis of malaria candidate-genes in different Sudanese populations, where the pronounced genetic heterogeneity becomes a source of concern for the potential effect on the studies outcome. Methods A total of 72 SNPs were genotyped using the Sequenom ® iPLEX Gold assay in 449 DNA samples that included; cases and controls from two village populations, malaria patients and out-patients from the area of Sinnar and additional controls consisting of healthy Nilo-Saharan speaking individuals. The population substructure was estimated using the Structure 2.2 programme. Results & Discussion The Hardy-Weinberg Equilibrium values were generally within expectation in Hausa and Massalit. However, in the Sinnar area there was a notable excess of homozygosity, which was attributed to the Whalund effect arising from population amalgamation within the sample. The programme STRUCTURE revealed a division of both Hausa and Massalit into two substructures with the partition in Hausa more pronounced than in Massalit; In Sinnar there was no defined substructure. More than 25 of the 72 SNPs assayed were informative in all areas. Some important SNPs were not differentially distributed between malaria cases and controls, including SNPs in CD36 and NOS2 . A number of SNPs showed significant p-values for differences in distribution of genotypes between cases and controls including: rs1805015 (in IL4R1 ) ( P = 0.001), rs17047661 (in CR1 ) ( P = 0.02) and rs1800750 (TNF-376) ( P = 0.01) in the hospital samples; rs1050828 ( G6PD+202 ) ( P = 0.02) and rs1800896 ( IL10-1082 ) ( P = 0.04) in Massalit and rs2243250 ( IL4 -589) ( P = 0.04) in Hausa. Conclusions The difference in population structure partly accounts for some of these ... |
format |
Article in Journal/Newspaper |
author |
Rockett Kirk A Mohamed Hiba S Elzein Abier M Hussein Aymen A Eid Nahid A Kwiatkowski Dominic P Ibrahim Muntaser E |
author_facet |
Rockett Kirk A Mohamed Hiba S Elzein Abier M Hussein Aymen A Eid Nahid A Kwiatkowski Dominic P Ibrahim Muntaser E |
author_sort |
Rockett Kirk A |
title |
Candidate malaria susceptibility/protective SNPs in hospital and population-based studies: the effect of sub-structuring |
title_short |
Candidate malaria susceptibility/protective SNPs in hospital and population-based studies: the effect of sub-structuring |
title_full |
Candidate malaria susceptibility/protective SNPs in hospital and population-based studies: the effect of sub-structuring |
title_fullStr |
Candidate malaria susceptibility/protective SNPs in hospital and population-based studies: the effect of sub-structuring |
title_full_unstemmed |
Candidate malaria susceptibility/protective SNPs in hospital and population-based studies: the effect of sub-structuring |
title_sort |
candidate malaria susceptibility/protective snps in hospital and population-based studies: the effect of sub-structuring |
publisher |
BMC |
publishDate |
2010 |
url |
https://doi.org/10.1186/1475-2875-9-119 https://doaj.org/article/be400a2edd734801a0f15e622013e263 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Malaria Journal, Vol 9, Iss 1, p 119 (2010) |
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http://www.malariajournal.com/content/9/1/119 https://doaj.org/toc/1475-2875 doi:10.1186/1475-2875-9-119 1475-2875 https://doaj.org/article/be400a2edd734801a0f15e622013e263 |
op_doi |
https://doi.org/10.1186/1475-2875-9-119 |
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Malaria Journal |
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9 |
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119 |
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