Abundant expression of HIV target cells and C-type lectin receptors in the foreskin tissue of young Kenyan men

Am J Pathol. 2010 Jun;176(6):2798-805. doi: 10.2353/ajpath.2010.090926. Epub 2010 Apr 15.

Abstract

A biological explanation for the reduction in HIV-1 (HIV) acquisition after male circumcision may be that removal of the foreskin reduces the number of target cells for HIV. The expression of potential HIV target cells and C-type lectin receptors in foreskin tissue of men at risk of HIV infection were thus analyzed. Thirty-three foreskin tissue samples, stratified by Herpes simplex virus type 2 status, were obtained from a randomized, controlled trial conducted in Kenya. The samples were analyzed by confocal in situ imaging microscopy and mRNA quantification by quantitative RT-qPCR. The presence and location of T cells (CD3(+)CD4(+)), Langerhans cells (CD1a(+)Langerin/CD207(+)), macrophages (CD68(+) or CD14(+)), and submucosal dendritic cells (CD123(+)BDCA-2(+) or CD11c(+)DC-SIGN(+)) were defined. C-type lectin receptor expressing cells were detected in both the epithelium and submucosa, and distinct lymphoid aggregates densely populated with CD3(+)CD4(+) T cells were identified in the submucosa. Although the presence of lymphoid aggregates and mRNA expression of selected markers varied between study subjects, Herpes simplex virus type 2 serostatus was not the major determinant for the detected differences. The detection of abundant and superficially present potential HIV target cells and submucosal lymphoid aggregates in foreskin mucosa from a highly relevant HIV risk group demonstrate a possible anatomical explanation that may contribute to the protective effect of male circumcision on HIV transmission.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Biomarkers / metabolism
  • Clinical Trials as Topic
  • Foreskin* / cytology
  • Foreskin* / metabolism
  • Foreskin* / virology
  • HIV Infections / metabolism*
  • HIV-1 / metabolism*
  • Herpesvirus 2, Human / metabolism
  • Humans
  • Kenya
  • Lectins, C-Type / metabolism*
  • Male
  • T-Lymphocytes / immunology
  • Young Adult

Substances

  • Biomarkers
  • Lectins, C-Type