Priming action on progesterone receptor synthesis by estradiol and tamoxifen in the 7,12-dimethylbenz(a)anthracene-induced rat mammary carcinoma.

Abstract:

:The priming action of estradiol and the antiestrogen tamoxifen (TMX) on progesterone receptor (PgR) synthesis has been investigated in the 7,12-dimethylbenz(a)anthracene-induced rat mammary tumor model testing different priming times. Rats received either TMX or estradiol benzoate (E2B) for 3 or 7 days. Tumors were assayed before and after treatment to investigate the changes produced by each treatment on estrogen receptor (ER) and PgR concentration. As expected, ER concentration decreased in each treatment group. PgR concentration increased after 3 days of either E2B or TMX administration, but decreased when treatment was prolonged to 7 days. These findings point out the time dependency of PgR induction in this tumor model, similarly to what was observed in other experimental and clinical conditions.

journal_name

Oncology

journal_title

Oncology

authors

Boccardo F,Cerruti G,De Menech R,Valenti G,Zanardi S

doi

10.1159/000226488

subject

Has Abstract

pub_date

1987-01-01 00:00:00

pages

248-52

issue

4

eissn

0030-2414

issn

1423-0232

journal_volume

44

pub_type

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