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No androgenic/anti-androgenic effects of bisphenol-A in Hershberger assay using immature castrated rats.

Abstract：

:Several studies have demonstrated that bisphenol A (BPA) exhibited weak estrogenic activity in the 3-day uterotrophic assay using ovariectomized (OVX) and immature rats (Toxicol. Lett. 115 (2000) 231; Regul. Toxicol. Pharmacol. 32 (2000) 118; J. Toxicol. Sci. 26 (2001) 111) and BPA also possessed anti-androgenic activity in in vitro yeast based assays (J. Endocrinol. 158 (1998) 327). To investigate anti-androgenic effects of BPA. a rodent Hershberger assay was carried out using immature Sprague-Dawley male rats. An androgen agonist, testosterone (0.4 mg/kg per day), was administered for 7 consecutive days by subcutaneous (s.c.) injection as a positive control. Additionally, a pure androgen antagonist, flutamide (1, 5. 10 mg/kg per day. oral) was co-administered with testosterone (0.4 mg/kg per day s.c.). BPA was also administered orally with or without testosterone (0.4 mg/kg per day, s.c.) for 7 consecutive days. In the testosterone treated groups, glans penis, seminal vesicles, ventral prostate, and levator ani plus bulbocavernosus muscles (LABC) weights were significantly increased compared with control. However. flulamide dose-dependently inhibited the testosterone-induced re-growth of seminal vesicles, ventral prostate, and LABC, with a significant decrease at flutamide 1.0 mg/kg and above (P<0.05). Serum LH levels were also significantly increased (5 mg/kg and above, P<0.05), but no changes in serum testosterone levels. In contrast, BPA had no effects on the re-growth of seminal vesicles, ventral prostate and LABC induced by testosterone, and no significant differences were observed in serum LH and testosterone levels. In summary, the Hershberger assay could be a sensitive method for detecting androgenic or anti-androgenic chemicals, but BPA did not exhibit any androgenic or anti-androgenic activities in Hershberger assay.

journal_name

Toxicol Lett

journal_title

Toxicology letters

authors

Kim HS,Han SY,Kim TS,Kwack SJ,Lee RD,Kim IY,Seok JH,Lee BM,Yoo SD,Park KL

doi

10.1016/s0378-4274(02)00130-3

keywords:

subject

Has Abstract

pub_date

2002-09-05 00:00:00

pages

111-23

issue

1-2

eissn

0378-4274

issn

1879-3169

pii

S0378427402001303

journal_volume

135

pub_type

杂志文章

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