Krüppel-like Factors 4 and 5: the Yin and Yang Regulators of Cellular Proliferation

Overview

Journal Cell Res

Specialty Cell Biology

Date 2005 Mar 3

PMID 15740636

Citations 173

Authors

Amr M Ghaleb

Mandayam O Nandan

Sengthong Chanchevalap

W Brian Dalton

Irfan M Hisamuddin

Vincent W Yang

Affiliations

Soon will be listed here.

Abstract

Krüppel-like factors (KLFs) are evolutionarily conserved zinc finger-containing transcription factors with diverse regulatory functions in cell growth, proliferation, differentiation, and embryogenesis. KLF4 and KLF5 are two closely related members of the KLF family that have a similar tissue distribution in embryos and adults. However, the two KLFs often exhibit opposite effects on regulation of gene transcription, despite binding to similar, if not identical, cis-acting DNA sequences. In addition, KLF4 and 5 exert contrasting effects on cell proliferation in many instances; while KLF4 is an inhibitor of cell growth, KLF5 stimulates proliferation. Here we review the biological properties and biochemical mechanisms of action of the two KLFs in the context of growth regulation.

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