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Update on Inherited Retinal Disease in South Africa: Encouraging Diversity in Molecular Genetics

Conference paper
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 1185)

Abstract

There is a glaring disparity in the populations included in genetic research; the majority of work involves European-derived cohorts, while other global populations – including Africans – are underrepresented. This is also true for the study of inherited retinal diseases. Being the most ancient of extant populations, African samples carry more variation than others, making them valuable for novel gene and variant discovery. The inclusion of diverse populations in research is essential to gain a more comprehensive understanding of genetic variation and molecular mechanisms of disease.

Keywords

Inherited retinal disease Genomics Diversity Africa 

References

  1. Ackuaku-Dogbe EM, Abaidoo B, Braimah ZI et al (2016) Causes of low vision and their management at Korle Bu Teaching Hospital, Accra, Ghana. J West Afr Coll Surg 6:105–122PubMedPubMedCentralGoogle Scholar
  2. Bourne RRA, Flaxman SR, Braithwaite T et al (2017) Magnitude, temporal trends, and projections of the global prevalence of blindness and distance and near vision impairment: a systematic review and meta-analysis. Lancet Glob Health 5:e888–e897CrossRefGoogle Scholar
  3. Bryc K, Durand EY, Macpherson JM et al (2015) The genetic ancestry of African Americans, Latinos, and European Americans across the United States. Am J Hum Genet 96:37–53CrossRefGoogle Scholar
  4. Campbell MC, Tishkoff SA (2010) The evolution of human genetic and phenotypic variation in Africa. Curr Biol 20:R166–R173CrossRefGoogle Scholar
  5. Cockburn N, Steven D, Lecuona K et al (2012) Prevalence, causes and socio-economic determinants of vision loss in Cape Town, South Africa. PLoS One 7:e30718CrossRefGoogle Scholar
  6. Daya M, van der Merwe L, Galal U et al (2013) A panel of ancestry informative markers for the complex five-way admixed South African coloured population. PLoS One 8:e82224CrossRefGoogle Scholar
  7. de Wit E, Delport W, Rugamika CE et al (2010) Genome-wide analysis of the structure of the South African Coloured Population in the Western Cape. Hum Genet 128:145–153CrossRefGoogle Scholar
  8. Fieggen K, Milligan C, Henderson B et al (2016) Bardet Biedl syndrome in South Africa: a single founder mutation. S Afr Med J 106:S72–S74CrossRefGoogle Scholar
  9. Flaxman SR, Bourne RRA, Resnikoff S et al (2017) Global causes of blindness and distance vision impairment 1990–2020: a systematic review and meta-analysis. Lancet Glob Health 5:e1221–e1234CrossRefGoogle Scholar
  10. González-Santos MG, Montinaro F, Oosthuizen O et al (2015) Genome-wide SNP analysis of Southern African populations provides new insights into the dispersal of Bantu-speaking groups. Genome Biol Evol 7:2560–2568CrossRefGoogle Scholar
  11. Henn BM, Botigué LR, Peischl S et al (2016) Distance from sub-Saharan Africa predicts mutational load in diverse human genomes. Proc Natl Acad Sci U S A 113:E440–E449CrossRefGoogle Scholar
  12. Henn BM, Cavalli-Sforza LL, Feldman MW (2012) The great human expansion. Proc Natl Acad Sci U S A 109:17758–17764CrossRefGoogle Scholar
  13. Henn BM, Gignoux CR, Jobin M et al (2011) Hunter-gatherer genomic diversity suggests a southern African origin for modern humans. Proc Natl Acad Sci U S A 108:5154–5162CrossRefGoogle Scholar
  14. Koboldt DC, Larson DE, Sullivan LS et al (2014) Exome-based mapping and variant prioritization for inherited Mendelian disorders. Am J Hum Genet 94:373–384CrossRefGoogle Scholar
  15. Marks SJ, Montinaro F, Levy H et al (2015) Static and moving frontiers: the genetic landscape of Southern African Bantu-speaking populations. Mol Biol Evol 32:29–43CrossRefGoogle Scholar
  16. May A, Hazelhurst S, Li Y et al (2013) Genetic diversity in black South Africans from Soweto. BMC Genomics 14:644CrossRefGoogle Scholar
  17. Naidoo K, Gichuhi S, Basáñez MG et al (2014) Prevalence and causes of vision loss in sub-Saharan Africa: 1990-2010. Br J Ophthalmol 98:612–618CrossRefGoogle Scholar
  18. Nishiguchi KM, Rivolta C (2012) Genes associated with retinitis pigmentosa and allied diseases are frequently mutated in the general population. PLoS One 7:e41902CrossRefGoogle Scholar
  19. Oswald AH, Goldblatt J, Sampson G et al (1985) Retinitis pigmentosa in South Africa. S Afr Med J 68:863–866PubMedGoogle Scholar
  20. Patterson N, Petersen DC, van der Ross RE et al (2010) Genetic structure of a unique admixed population: implications for medical research. Hum Mol Genet 19:411–419CrossRefGoogle Scholar
  21. Pierrache LHM, Kimchi A, Ratnapriya R et al (2017) Whole-exome sequencing identifies biallelic IDH3A variants as a cause of retinitis pigmentosa accompanied by pseudocoloboma. Ophthalmology 124:992–1003CrossRefGoogle Scholar
  22. Popejoy AB, Fullerton SM (2016) Genomics is failing on diversity. Nature 538:161–164CrossRefGoogle Scholar
  23. Ramesar RS, Roberts L, Rebello G et al (2003) Retinal degenerative disorders in Southern Africa: a molecular genetic approach. Adv Exp Med Biol 533:35–40CrossRefGoogle Scholar
  24. Rebello MT, Greenberg LJ, Ramesar RS (2002) A computer-based register for inherited retinal dystrophies in Southern Africa. Ophthalmic Genet 23:61–65CrossRefGoogle Scholar
  25. Roberts L, George S, Greenberg J et al (2015) A founder mutation in MYO7A underlies a significant proportion of Usher syndrome in indigenous South Africans: implications for the African diaspora. Invest Ophthalmol Vis Sci 56:6671–6678CrossRefGoogle Scholar
  26. Roberts L, Goliath R, Rebello G et al (2016a) Inherited retinal disorders in South Africa and the clinical impact of evolving technologies. S Afr Med J 106:S33–S37CrossRefGoogle Scholar
  27. Roberts L, Ratnapriya R, du Plessis M et al (2016b) Molecular diagnosis of inherited retinal diseases in indigenous African populations by whole-exome sequencing. Invest Ophthalmol Vis Sci 57:6374–6381CrossRefGoogle Scholar
  28. Roberts LJ, Nossek CA, Greenberg LJ et al (2012) Stargardt macular dystrophy: common ABCA4 mutations in South Africa--establishment of a rapid genetic test and relating risk to patients. Mol Vis 18:280–289PubMedPubMedCentralGoogle Scholar
  29. Schuster SC, Miller W, Ratan A et al (2010) Complete Khoisan and Bantu genomes from southern Africa. Nature 463:943–947CrossRefGoogle Scholar
  30. September AV, Vorster AA, Ramesar RS et al (2004) Mutation spectrum and founder chromosomes for the ABCA4 gene in South African patients with Stargardt disease. Invest Ophthalmol Vis Sci 45:1705–1711CrossRefGoogle Scholar
  31. Taylor HR, Katala S, Muñoz B et al (1991) Increase in mortality associated with blindness in rural Africa. Bull World Health Organ 69:335–338PubMedPubMedCentralGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.UCT/MRC Genomic and Precision Medicine Research Unit, Division of Human Genetics, Department of PathologyInstitute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape TownCape TownSouth Africa

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