Centre for Chronic Disease, School of Medicine, The University of Queensland, Herston, Queensland, Australia.
Kidney Int. 2012 Dec;82(12):1321-31. doi: 10.1038/ki.2012.307. Epub 2012 Aug 29.
Australia's Indigenous people have high rates of chronic kidney disease and kidney failure. To define renal disease among these people, we reviewed 643 renal biopsies on Indigenous people across Australia, and compared them with 249 biopsies of non-Indigenous patients. The intent was to reach a consensus on pathological findings and terminology, quantify glomerular size, and establish and compare regional biopsy profiles. The relative population-adjusted biopsy frequencies were 16.9, 6.6, and 1, respectively, for Aboriginal people living remotely/very remotely, for Torres Strait Islander people, and for non-remote-living Aboriginal people. Indigenous people more often had heavy proteinuria and renal failure at biopsy. No single condition defined the Indigenous biopsies and, where biopsy rates were high, all common conditions were in absolute excess. Indigenous people were more often diabetic than non-Indigenous people, but diabetic changes were still present in fewer than half their biopsies. Their biopsies also had higher rates of segmental sclerosis, post-infectious glomerulonephritis, and mixed morphologies. Among the great excess of biopsies in remote/very remote Aborigines, females predominated, with younger age at biopsy and larger mean glomerular volumes. Glomerulomegaly characterized biopsies with mesangiopathic changes only, with IgA deposition, or with diabetic change, and with focal segmental glomerulosclerosis (FSGS). This review reveals great variations in biopsy rates and findings among Indigenous Australians, and findings refute the prevailing dogma that most indigenous renal disease is due to diabetes. Glomerulomegaly in remote/very remote Aboriginal people is probably due to nephron deficiency, in part related to low birth weight, and probably contributes to the increased susceptibility to kidney disease and the predisposition to FSGS.
澳大利亚的土著居民患有慢性肾脏病和肾衰竭的比率很高。为了确定这些人群中的肾脏疾病,我们对澳大利亚各地的 643 例土著居民的肾脏活检进行了回顾,并将其与 249 例非土著患者的活检进行了比较。目的是就病理发现和术语达成共识,量化肾小球大小,并建立和比较区域性活检概况。经人口调整后的相对活检频率分别为 16.9、6.6 和 1,分别为居住在偏远/极偏远地区的原住民、托雷斯海峡岛民和非偏远地区的原住民。土著居民在活检时更常出现大量蛋白尿和肾衰竭。没有一种单一的疾病可以定义土著居民的活检,而且在活检率较高的情况下,所有常见的疾病都绝对过多。土著居民患糖尿病的比例高于非土著居民,但在他们的活检中,只有不到一半的患者出现糖尿病改变。他们的活检还具有更高的节段性硬化、感染后肾小球肾炎和混合形态的发生率。在偏远/极偏远地区原住民中,大量的活检中,女性居多,活检时的年龄更小,平均肾小球体积更大。只有系膜病变、IgA 沉积或糖尿病改变和局灶节段性肾小球硬化(FSGS)的活检存在肾小球肿大。本综述揭示了澳大利亚土著居民中活检率和发现的巨大差异,这些发现反驳了普遍存在的观点,即大多数土著肾脏疾病是由糖尿病引起的。偏远/极偏远地区的原住民肾小球肿大可能是由于肾小球数量不足引起的,部分原因与出生体重低有关,可能导致对肾脏疾病的易感性增加和 FSGS 的易感性增加。