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Permeable FGF-1 nuclear localization signal peptide stimulates DNA synthesis in various cell types but is cell-density sensitive and unable to support cell proliferation.

Abstract：

:An earlier report indicated that a 26-amino-acid peptide (SA), comprised of the nuclear localization signal (NLS) of fibroblast growth factor-1 (FGF-1) and a membrane-permeable peptide, was able to stimulate DNA synthesis after it was taken up by NIH3T3 fibroblasts. Here, we report that SA, but not a mutant with the NLS motif destroyed, induced DNA synthesis in BALB/c3T3 murine fibroblasts, human vascular endothelial (HUVE) cells, and primary cultured hepatocytes, although the activity was weaker than that of FGF-1. The kinetics of SA-induced DNA synthesis and G1 cyclin expression were similar to those elicited by FGF-1, indicating that SA induces cell cycle progression. Kinetic analysis also suggested that SA stimulates only a fraction of the DNA replication in BALB/c3T3 cells. At high cell densities, SA-induced G1 cyclin expression and DNA synthesis were more strongly inhibited than those induced by FGF-1. SA did not induce cell division in HUVE and BALB/c3T3 cells and did not interfere with FGF-1-stimulated proliferation of HUVE cells. These results indicate that SA is able to partially induce cell cycle progression through a contact-inhibition sensitive signaling pathway, but it is insufficient to support cell mitosis. We also suggest that signaling by SA does not interfere with that of FGF-1.

journal_name

Exp Cell Res

journal_title

Experimental cell research

authors

Komi A,Suzuki M,Imamura T

doi

10.1006/excr.1998.4176

subject

Has Abstract

pub_date

1998-09-15 00:00:00

pages

408-14

issue

2

eissn

0014-4827

issn

1090-2422

pii

S0014-4827(98)94176-3

journal_volume

243

pub_type

杂志文章

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