Melatonin down-regulates hTERT expression induced by either natural estrogens (17beta-estradiol) or metalloestrogens (cadmium) in MCF-7 human breast cancer cells.

Abstract:

:The goal was to evaluate whether melatonin (Mel) down-regulates hTERT expression induced by 17beta-estradiol (E(2)) or cadmium (Cd) in breast cancer cells. We found that: (a) Mel inhibits E(2) or Cd-induced hTERT transcription in hTERT-Luc transfected MCF-7 cells, (b) Mel significantly reduces E(2)- and Cd-mediated hTERT transactivation triggered by ERalpha in transfected HeLa cells, (c) Mel inhibits hTERT expression induced by E(2) or Cd in MCF-7 cells. Melatonin inhibition of telomerase activity supports a possible role in treatment of estrogen-dependent tumors or carcinogenesis by environmental or occupational exposure to xenoestrogens.

journal_name

Cancer Lett

journal_title

Cancer letters

authors

Martínez-Campa CM,Alonso-González C,Mediavilla MD,Cos S,González A,Sanchez-Barcelo EJ

doi

10.1016/j.canlet.2008.04.001

subject

Has Abstract

pub_date

2008-09-18 00:00:00

pages

272-7

issue

2

eissn

0304-3835

issn

1872-7980

pii

S0304-3835(08)00278-4

journal_volume

268

pub_type

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