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Tubular Cell and HIV-1 gp120 Interaction Products Promote Migration of Monocytes

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Abstract

Renal interstitial accumulation of monocytes is an important feature of HIV-associated nephropathy. We studied the effects of proximal tubular cell products (TCP) and proximal tubular cell-gp120 interaction products (TC-120IP) on the migration of monocytes across a modified Boyden chamber. TC-120IP promoted (P<0.001) the migration of monocytes when compared with TCP (TCP, 45.0 ± 5.9 vs. TC-120IP, 192.3 ± 39.5 migrated monocytes/field). This effect of TC-120IP on monocyte migration was dose dependent. Anti-MCP-1 (TCP, 24.7 ± 2.6; TC-120IP, 82.3 ± 5.5; TC120-IP + anti-MCP-1 antibody, 46.5 ± 3.5 migrated monocytes/field) as well as anti-TGF-β antibodies (TCP, 25.8 ± 3.4; TC120-IP, 80.3 ± 6.9; TC-120IP + anti-TGF-β antibody, 43.8 ± 5.6 migrated monocytes/field) partly attenuated TC-120IP-induced migration of monocytes across a filter. Moreover, anti-MCP-1 and anti-TGF antibodies showed an additive inhibitory effect on TC-1201P-induced migration of monocytes across a filter. These results suggest that TC-120IP-induced migration of monocytes may be mediated through the generation of MCP-1 and TGF-β by tubular cells. The present study provides the basis for a hypothesis that HIV-1 gp120 protein may be contributing to the infiltration of monocytes in the renal interstitium of patients with HIV-associated nephropathy.

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Authors and Affiliations

  1. Department of Medicine, Long Island Jewish Medical Center, New Hyde Park, New York, 11040.

    Amrish Kapasi, Pravin Bhat & Pravin C. Singhal

  2. Long Island Campus for Albert Einstein College of Medicine, Bronx, New York, 10461

    Amrish Kapasi, Pravin Bhat & Pravin C. Singhal

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  1. Amrish Kapasi
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Kapasi, A., Bhat, P. & Singhal, P.C. Tubular Cell and HIV-1 gp120 Interaction Products Promote Migration of Monocytes. Inflammation 22, 137–144 (1998). https://doi.org/10.1023/A:1022331905200

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