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Published on: June 20, 2018
Renal problems in black South African children
1Division of Paediatric Nephrology, University of the Witwatersrand, Johannesburg Hospital, South Africa.
Insights
Black South African children show distinct kidney disease patterns, with focal glomerulosclerosis being a leading cause of renal failure. Tuberculosis and autoimmune factors may influence these conditions, impacting kidney transplantation outcomes.
Area of Science:
- Pediatric Nephrology
- Immunology
- Epidemiology
Background:
- Black South African children exhibit unique patterns of kidney diseases, including higher rates of acute post-streptococcal glomerulonephritis and focal glomerulosclerosis.
- Certain conditions like reflux nephropathy and polycystic kidney disease are less common, while hemolytic uremic syndrome is increasing, often linked to Shigella dysenteriae type 1.
Purpose of the Study:
- To investigate the prevalence and characteristics of kidney diseases in Black South African children.
- To explore potential associations between infections, autoimmune responses, and specific nephropathies.
- To understand challenges in kidney transplantation for this demographic.
Main Methods:
- Retrospective analysis of pediatric kidney disease cases.
- Clinical data review focusing on disease prevalence, etiology, and outcomes.
- Correlation studies examining links between tuberculosis, Takayasu's arteritis, and focal glomerulosclerosis.
Main Results:
- Focal glomerulosclerosis is the primary cause of end-stage renal disease requiring transplantation, followed by post-streptococcal glomerulonephritis.
- An intriguing association exists between tuberculosis and focal glomerulosclerosis progression, and an almost absolute link between tuberculosis and Takayasu's arteritis.
- Kidney transplantation is complicated by donor scarcity, tissue mismatches, and compliance issues in lower socioeconomic groups.
Conclusions:
- Kidney disease profiles in Black South African children differ significantly from other populations.
- Tuberculosis and potential autoimmune mechanisms appear to play a crucial role in the pathogenesis and progression of focal glomerulosclerosis and Takayasu's arteritis.
- Addressing socioeconomic factors and improving transplant logistics are vital for better patient outcomes.
Abstract:
Black South African children have an increased prevalence of acute post-streptococcal glomerulonephritis, focal glomerulosclerosis, hepatitis B-associated membranous nephropathy, congenital syphilis, congenital nephrotic syndrome with Alport-like basement membrane changes and Takayasu's arteritis, but a paucity of reflux nephropathy, polycystic kidney disease and non-shigella-induced haemolytic uraemic syndrome. However, in recent years, the haemolytic uraemic syndrome has become more prevalent in black children; this is usually due to Shigella dysenteriae type 1, and could indicate a different emphasis in the pathogenic mechanism. Focal glomerulosclerosis is the commonest reason for renal failure requiring transplantation in black children with rapidly progressive glomerulonephritis (usually streptococcal induced) being second. Transplantation has been somewhat problematic with a scarcity of kidneys at times, many mismatches and poor compliance in the lower socio-economic groups. The association of tuberculosis with focal glomerulosclerosis and Takayasu's arteritis in black South African children is intriguing. The progression of focal glomerulosclerosis is accelerated in those patients with evidence of previous tuberculosis, and in Takayasu's arteritis the association is almost absolute as experienced locally, with the data suggesting an autoimmune reaction.
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