Inhibition of murine cytotoxic T lymphocyte activity by a synthetic retroviral peptide and abrogation of this activity by IL.

Journal Article (Journal Article)

A synthetic 17 amino acid peptide (CKS-17) homologous to a highly conserved region of human and animal retroviral transmembrane proteins was investigated for its influence on the generation of murine alloantigen-specific CTL activity in vitro. CKS-17 coupled to a carrier protein, BSA or human serum albumin, inhibited the generation of anti-allo CTL in a dose-dependent manner. Controls consisting of BSA and human serum albumin, which had undergone the coupling procedure or neurotensin, an unrelated peptide, coupled to BSA in an identical manner as CKS-17 showed no such inhibitory action. The suppression was not restricted to the Ag specificity of the CTL activity. CKS-17 exerted inhibitory effects on the early afferent phase of CTL induction. Kinetic studies showed that the suppressive activity occurred when CKS-17 was introduced to the immunologically stimulating culture concomitant with or up to 48 h after initiation of culture. Analysis of the frequency of CTL precursor cells using limiting-dilution assays revealed that CKS-17 did act to reduce the number of precursor cells. Abrogation of the inhibition of CTL activity was observed when IL-2 was introduced to the culture together with the stimulator cells. Other lymphokines, such as IL-4, exerted a similar influence to counteract this suppression.

Full Text

Duke Authors

Cited Authors

  • Ogasawara, M; Haraguchi, S; Cianciolo, GJ; Mitani, M; Good, RA; Day, NK

Published Date

  • July 15, 1990

Published In

Volume / Issue

  • 145 / 2

Start / End Page

  • 456 - 462

PubMed ID

  • 2195116

International Standard Serial Number (ISSN)

  • 0022-1767


  • eng

Conference Location

  • United States