Down-regulation of Fas-L in glioma cells by ribozyme reduces cell apoptosis, tumour-infiltrating cells, and liver damage but accelerates tumour formation in nude mice

C. C. Chio, Y. S. Wang, Y. L. Chen, S. J. Lin, B. C. Yang

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Fas-L (CD95L, APO-1L) expresses in a variety of tumours and has been proposed to play a role in tumour formation and metastasis. The contribution of Fas-L to tumour growth, however, is not conclusive especially in systems using cells with over-expressed Fas-L. In this study we down-regulated the expression o Fas-L in human glioma cells by a hammerhead ribozyme (Fas-L ribozyme) targeting against Fas-L mRNA. Fas-L ribozyme-carrying cells exhibited slightly enhanced growth rate and less degree of spontaneous apoptosis in vitro as compared with vector controls. In nude mice, Fas-L ribozyme-carrying cells grew faster with lesser apoptosis, formed bigger tumour with significantly fewer infiltrating cells in the tumour area, and triggered relatively milder tumour-associated liver damage than vector controls did. Thus, down-regulation of Fas-L not only improved viability of glioma cells but also reduces local immune responses that may consequently affect tumour formation. Taken together, our findings imply that endogenous expression of Fas-L in malignant cells is not always growth promoting.

Original languageEnglish
Pages (from-to)1185-1192
Number of pages8
JournalBritish Journal of Cancer
Volume85
Issue number8
DOIs
Publication statusPublished - 2001 Oct 19

All Science Journal Classification (ASJC) codes

  • Oncology
  • Cancer Research

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