Cancer cell growth and extracellular matrix remodeling mechanism of ascorbate; beneficial modulation by P. leucotomos.

Abstract:

:Ascorbate has dose-dependent inverse effects on cancer cells growth and expression of matrixmetalloproteinases (MMP) and transforming growth factor-beta (TGF-beta), which regulate extracellular matrix (ECM) remodeling. We examined melanoma cell viability and ECM remodeling mechanisms of ascorbate and its modulation by an extract from Polypodium leucotomos (PL) (a fern) via the regulation of apoptosis, heat-shock proteins (HSPs), MMP-1 or tissue inhibitors of matrix metalloproteinase-1 (TIMP-1) that inhibits MMP-1. The dose-dependent regulation of cell viability/proliferation by ascorbate was associated with inverse regulation of apoptosis and stimulation of HSPs at growth-inhibitory concentrations. PL antagonized the stimulation of MMP-1, TGF-beta and HSPs by a growth-inhibitory ascorbate dose and stimulated the expression of TIMP-1, while maintaining growth inhibition. We infer that a combination of ascorbate with PL is beneficial to cancer management via the simultaneous inhibition of cell growth and expression of MMP-1, TGF-beta and HSPs, and furthermore, the stimulation of TIMP-1.

journal_name

Anticancer Res

journal_title

Anticancer research

authors

Philips N,Dulaj L,Upadhya T

subject

Has Abstract

pub_date

2009-08-01 00:00:00

pages

3233-8

issue

8

eissn

0250-7005

issn

1791-7530

pii

29/8/3233

journal_volume

29

pub_type

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