Platelet-activating factor activates mitogen-activated protein kinases, inhibits proliferation, induces differentiation and suppresses the malignant phenotype of human colon carcinoma cells.

Abstract:

:Recent studies suggest that the action of platelet-activating factor (PAF), a potent phospholipid modulator of allergic and inflammatory reactions, is diverse and functions as a modulator of a variety of physiological and pathological events in many cell types and tissues. Its role (if any) in modulating the proliferation, transformation and/or differentiation of epithelial colonic cells, however, is not known. In this study, we showed that PAF is biologically active in epithelial-derived human colon carcinoma cells with different phenotypic properties. These cells expressed the PAF receptor. PAF activated three prominent mitogen-activated protein kinase modules (ERK, p38MAPK and Jun N-terminal kinases) in these cells, inhibited proliferation and induced differentiation (measured by the induction of Waf1/p21 and the induction of the differentiation-related marker CEA). The net effect of PAF treatment was the suppression of malignant cell behavior (measured by anchorage-independent growth and cellular invasion). It is concluded that PAF is a modulator of proliferation and differentiation in human epithelial-derived colon carcinoma cells.

journal_name

Oncogene

journal_title

Oncogene

authors

Wang H,Chakrabarty S

doi

10.1038/sj.onc.1206348

subject

Has Abstract

pub_date

2003-04-10 00:00:00

pages

2186-91

issue

14

eissn

0950-9232

issn

1476-5594

pii

1206348

journal_volume

22

pub_type

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