Low dose neonatal exposure to bisphenol A affects emotional and social functions in a sex dependent manner in rats

2011 ◽  
Vol 71 ◽  
pp. e280-e281
Author(s):  
Yuki Tsuneyoshi ◽  
Akira Masuda ◽  
Kimiya Narikiyo ◽  
Nami Someya ◽  
Shuji Aou
Neuroscience ◽  
2009 ◽  
Vol 159 (1) ◽  
pp. 161-171 ◽  
Author(s):  
R. Zhou ◽  
Z. Zhang ◽  
Y. Zhu ◽  
L. Chen ◽  
M. Sokabe ◽  
...  

2006 ◽  
Vol 402 (3) ◽  
pp. 249-252 ◽  
Author(s):  
Minoru Narita ◽  
Kazuya Miyagawa ◽  
Keisuke Mizuo ◽  
Takuya Yoshida ◽  
Tsutomu Suzuki

2007 ◽  
Vol 194 (1) ◽  
pp. 201-212 ◽  
Author(s):  
Lucas Monje ◽  
Jorgelina Varayoud ◽  
Enrique H Luque ◽  
Jorge G Ramos

The xenoestrogen bisphenol A (BPA) is commonly ingested by humans. We examined the effects of neonatal exposure to low versus high doses of BPA over the control of estrogen receptor α (ERα) expression in the preoptic area (POA) of prepubertal female rats. Pups received s.c. injections every 48 h of BPA (high dose, 20 mg/kg and low dose, 0.05 mg/kg) or diethylstilbestrol (DES, 0.02 mg/kg) from postnatal day (PND) 1 to PND7 and were killed at PND8 or PND21. Relative expression of ERα transcripts containing alternative 5′-untranslated regions OS, ON, O, OT, and E1 in POA were evaluated by RT-PCR. Methylation status of ERα promoters was determined by bisulfited DNA restriction analysis and ERα protein by immunohistochemistry. In PND8, the high dose of BPA and DES diminished total ERα mRNA levels, mediated by the decreased expression of ERα-O and ERα-OT variants. In contrast, the low dose of BPA augmented total ERα mRNA by increasing the expression of the ERα-E1 variant. In PND21, both BPA doses increased total ERα mRNA by means of the augmented expression of ERα-O and ERα-OT variants. In PND21, the methylation status of the ERα promoters and the circulating levels of estradiol were similar in all experimental groups. At PND8 and PND21, DES and the high dose of BPA decreased, while the low dose of BPA increased ERα protein in the POA. These findings show that neonatal BPA exposure alters the abundance of hypothalamic ERα transcript variants and protein in a dose-dependent manner.


2012 ◽  
Vol 211 ◽  
pp. S159
Author(s):  
Sofiane Boudalia ◽  
Raymond Berges ◽  
Franck Menetrier ◽  
Cécile Helies ◽  
Marie-Chantal Canivenc-Lavier

2011 ◽  
Vol 32 (3) ◽  
pp. 304-312 ◽  
Author(s):  
Oscar E. Rivera ◽  
Jorgelina Varayoud ◽  
Horacio A. Rodríguez ◽  
Mónica Muñoz-de-Toro ◽  
Enrique H. Luque

2002 ◽  
Vol 16 (2) ◽  
pp. 117-122 ◽  
Author(s):  
Shizuka Honma ◽  
Atsuko Suzuki ◽  
David L. Buchanan ◽  
Yoshinao Katsu ◽  
Hajime Watanabe ◽  
...  

Author(s):  
Xin Dai ◽  
Xiao-Feng Sun ◽  
Ai-Qin Wang ◽  
Wanhong Wei ◽  
Sheng-Mei Yang

Gallic acid (GA), a phenol that is present in various plants, potentially contains antioxidant properties. This study aimed to investigate the effects of GA on the reproduction of adolescent male Brandt’s voles (Lasiopodomys brandtii (Radde, 1861)). Antioxidant levels and apoptosis in the testis, as well as reproductive physiology, were evaluated in adolescent males treated with GA. The results showed that a low dose of GA enhanced relative epididymis weight and the sperm density in the epididymis, increased the mRNA levels of steroidogenic acute regulatory protein in the testis, and reduced the percentages of abnormal and dead sperm. In addition, a low dose of GA significantly increased the levels of superoxide dismutase, catalase, and glutathione peroxidase, and decreased the level of malondialdehyde in the testis, as well as the mRNA and protein levels of the apoptosis related gene, caspase-3. However, a high dose of GA sharply reduced the average diameter of the seminiferous tubules compared to a low dose. Collectively, these findings demonstrate that GA treatment during puberty affects the reproductive responses of male Brandt’s voles in a dose-dependent manner by regulating antioxidant levels and apoptosis.


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