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The phthalate DEHP modulates the estrogen receptors α and β increasing lactotroph cell population in female pituitary glands.

Abstract：

:Humans are exposed to numerous endocrine disruptors on a daily basis, which may interfere with endogenous estrogens, with Di-(2-ethylhexyl) phthalate (DEHP) being one of the most employed. The anterior pituitary gland is a target of 17β-estradiol (E2) through the specific estrogen receptors (ERs) α and β, whose expression levels fluctuate in the gland under different contexts, and the ERα/β index is responsible for the final E2 effect. The aim of the present study was to evaluate in vivo and in vitro the DEHP effects on ERα and β expression in the pituitary cell population, and also its impact on lactotroph and somatotroph cell growth. Our results revealed that perinatal exposure to DEHP altered the ERα and β expression pattern in pituitary glands from prepubertal and adult female rats and increased the percentage of lactotroph cells in adulthood. In the in vitro system, DEHP down-regulated ERα and β expression, and as a result increased the ERα/β ratio and decreased the percentages of lactotrophs and somatotrophs expressing ERα and β. In addition, DEHP increased the S + G2M phases, Ki67 index and cyclin D1 in vitro, leading to a rise in the lactotroph and somatotroph cell populations. These results showed that DEHP modified the pituitary ERα and β expression in lactotrophs and somatotrophs from female rats and had an impact on the pituitary cell growth. These changes in ER expression may be a mechanism underlying DEHP exposure in the pituitary gland, leading to cell growth deregulation.

journal_name

Chemosphere

journal_title

Chemosphere

authors

Pérez PA,Toledo J,Sosa LDV,Peinetti N,Torres AI,De Paul AL,Gutiérrez S

doi

10.1016/j.chemosphere.2020.127304

subject

Has Abstract

pub_date

2020-11-01 00:00:00

pages

127304

eissn

0045-6535

issn

1879-1298

pii

S0045-6535(20)31497-1

journal_volume

258

pub_type

杂志文章

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