Da Costa C T, Khanolkar-Young S, Elliott A M, Wasunna K M, McAdam K P
Department of Clinical Sciences, London School of Hygiene & Tropical Medicine, UK.
Clin Exp Immunol. 1993 Jan;91(1):25-9. doi: 10.1111/j.1365-2249.1993.tb03348.x.
Immunoglobulin G subclass responses to lipoarabinomannan (LAM) of Mycobacterium tuberculosis were determined by ELISA in both HIV-1 antibody positive (n = 31) and negative (n = 43) patients with tuberculosis (TB). Responses were also studied in a group of healthy controls (n = 16) and HIV-1 antibody positive (n = 60) individuals without TB. IgG2 antibodies were the predominant subclass, being present in 25 of 43 non-HIV-infected TB patients (58%) and in 11 of 31 HIV-infected TB patients (35%). However, HIV+ TB patients also showed IgG4 (n = 16; 52%), and IgG1 (n = 4, 13%) responses to LAM, whereas these subclasses were absent in sera from HIV-TB patients. Individuals in both non-tuberculous control groups showed no antibody responses to LAM. The influence of HIV infection on B cell responses to LAM, and possible mechanisms for antibody-mediated regulation of immunity to TB, are explored.
采用酶联免疫吸附测定法(ELISA),对31例HIV-1抗体阳性和43例HIV-1抗体阴性的结核病(TB)患者针对结核分枝杆菌脂阿拉伯甘露聚糖(LAM)的免疫球蛋白G亚类反应进行了测定。还对一组健康对照者(n = 16)和60例无结核病的HIV-1抗体阳性个体进行了反应研究。IgG2抗体是主要亚类,在43例未感染HIV的结核病患者中有25例(58%)出现,在31例感染HIV的结核病患者中有11例(35%)出现。然而,HIV阳性结核病患者对LAM还表现出IgG4反应(n = 16;52%)和IgG1反应(n = 4,13%),而在未感染HIV的结核病患者血清中未出现这些亚类反应。两个非结核对照组个体对LAM均无抗体反应。本文探讨了HIV感染对B细胞针对LAM反应的影响,以及抗体介导的结核病免疫调节的可能机制。