Albinism research in a Southern African setting: unique findings.

Abstract

Research on oculocutaneous albinism (OCA) in the black African population has been ongoing for 52 years (1971-2023) in the Division of Human Genetics, University of the Witwatersrand, Johannesburg, South Africa. The aim of the present study was to review all the relevant published articles and focus on selected articles with unique findings. The results showed that unique findings were reported in psychosocial, cultural, epidemiological, clinical and molecular fields of study. The local prevalence of albinism was found to be 1 in 3900, higher than that reported in many other countries, although a worldwide review on prevalence showed that only 26/193 (13%) countries had published figures; the commonest types of OCA found were OCA2 and then OCA3; the high rate of skin cancer was documented; and the natural history of OCA described. Molecular studies showed that the 2.7 kb deletion mutation in the OCA2 gene is the common mutation in OCA2 locally, and further identified unique mutations in TYRP1 causing rufous albinism (OCA3) in this population. An early study found that after the birth of a child with OCA maternal-infant bonding was delayed, and only established some months later. Further research revealed that superstitions and myths surrounded the birth and the death of a person with OCA, and the belief that powerful medicines could be made from body parts, was very disturbing. Genetic causes of OCA were poorly understood by affected individuals, their relatives and communities, and genetic counselling is essential. In summary, over 30 studies were undertaken and published over a period of five decades, and many presented unique findings on this under-researched inherited condition.