Pereira L E, Onlamoon N, Wang X, Wang R, Li J, Reimann K A, Villinger F, Pattanapanyasat K, Mori K, Ansari A A
Department of Pathology & Laboratory Medicine, Emory University School of Medicine, Room 2309 WMB, 101 Woodruff Circle, Atlanta, GA 30322, USA.
Cell Immunol. 2009;259(2):165-76. doi: 10.1016/j.cellimm.2009.06.012. Epub 2009 Jun 26.
Recent findings established that primary targets of HIV/SIV are lymphoid cells within the gastrointestinal (GI) tract. Focus has therefore shifted to T-cells expressing alpha(4)beta(7) integrin which facilitates trafficking to the GI tract via binding to MAdCAM-1. Approaches to better understand the role of alpha(4)beta(7)+ T-cells in HIV/SIV pathogenesis include their depletion or blockade of their synthesis, binding and/or homing capabilities in vivo. Such studies can ideally be conducted in rhesus macaques (RM), the non-human primate model of AIDS. Characterization of alpha(4)beta(7) expression on cell lineages in RM blood and GI tissues reveal low densities of expression by NK cells, B-cells, naïve and TEM (effector memory) T-cells. High densities were observed on TCM (central memory) T-cells. Intravenous administration of a single 50mg/kg dose of recombinant rhesus alpha(4)beta(7) antibody resulted in significant initial decline of alpha(4)beta(7)+ lymphocytes and sustained coating of the alpha(4)beta(7) receptor in both the periphery and GI tissues.
最近的研究结果表明,HIV/SIV的主要靶细胞是胃肠道(GI)内的淋巴细胞。因此,研究重点已转向表达α(4)β(7)整合素的T细胞,该整合素通过与黏膜血管地址素细胞黏附分子-1(MAdCAM-1)结合促进向胃肠道的迁移。更好地理解α(4)β(7)+ T细胞在HIV/SIV发病机制中作用的方法包括在体内耗尽这些细胞或阻断其合成、结合和/或归巢能力。此类研究理想情况下可在恒河猴(RM)中进行,RM是艾滋病的非人灵长类动物模型。对RM血液和胃肠道组织中细胞谱系上α(