A role for surfactant protein D in innate immunity of the human prostate

Rebecca E. Oberley, Kelli L. Goss, Laila Dahmoush, Kevin A. Ault, Erika C. Crouch, Jeanne M. Snyder

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

OBJECTIVES. Surfactant protein D (SP-D) is a member of the collectin family of proteins, which are involved in host defense mechanisms in the lung. In the present study, we found that SP-D is produced in the human prostate where it may play a role in innate immunity. METHODS AND RESULTS. Using reverse- transcriptase PCR and Western blot analysis, we demonstrate that SP-D mRNA and protein are present in human prostate tissue. In situ hybridization and immunohistochemistry revealed that SP-D mRNA and protein are localized in epithelial cells of prostate glands. Prostate glands that are surrounded by inflammatory cells produce increased amounts of SP-D protein. We also show that SP-D inhibits the infection of LNCaP and P69SV40T prostate epithelial cells by Chlamydia tmchomatis in an in vitro infection assay. Furthermore, using truncated human SP-D mutants, we demonstrate that SP-D binds to Chlamydia trachomatis via its carboxy-terminal lectin domains. CONCLUSIONS. Our in vitro studies suggest that SP-D protects the prostate from infection by pathogens. SP-D protein levels are increased at sites of inflammation in the prostate, suggesting SP-D may also contribute more generally to inflammatory regulation in the prostate.

Original languageEnglish (US)
Pages (from-to)241-251
Number of pages11
JournalProstate
Volume65
Issue number3
DOIs
StatePublished - Nov 1 2005
Externally publishedYes

Keywords

  • Chlamydia trachomatis
  • Human
  • Inflammation
  • Innate host defense
  • Reproductive tract
  • Surfactant protein D

ASJC Scopus subject areas

  • Oncology
  • Urology

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