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Effects of 4-nonylphenol isomers on cell receptors and mitogen-activated protein kinase pathway in mouse Sertoli TM4 cells. | LitMetric

Effects of 4-nonylphenol isomers on cell receptors and mitogen-activated protein kinase pathway in mouse Sertoli TM4 cells.

Toxicology

State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang 330047, China. Electronic address:

Published: December 2014

AI Article Synopsis

Article Abstract

In the present study, experiments were performed to investigate the effects of nonylphenol (NP) isomers (4-[1,2, 4-trimethylhexyl]-phenol (NP41), 4-[1,2, 5-trimethylhexyl]-phenol (NP42)) on Sertoli TM4 cells. NP41 decreased mRNA expression levels of androgen receptor and toll-like receptor (TLR)-4 in 20-40μM (P<0.05), and increased mRNA levels of estrogen receptor (ER)-α and progesterone receptor in 1-40μM (P<0.05). NP42 treatment only evoked significant decrease in mRNA expression levels of ER-α in 20-40μM (P<0.05). Similarly, NP41 (1-40μM) drastically increased the protein expression of ER-α, which was significantly decreased in 20-40μM NP42 groups (P<0.01). Both NP41 and NP42 showed no effect on the expression of ER-β. Protein levels of follicle stimulating hormone receptor were increased significantly in high concentrations of NP41 (40μM) and NP42 (10-40μM) challenged cells. Furthermore, NP41 and NP42 showed various effects on the expression of junction-associated molecules and inhibin B secretion in TM4 cells. Additionally, activation of JNK1/2 pathway was induced by NP41 and NP42. However, ERK1/2 and p38 pathways were inhibited in TM4 cells exposed to low concentrations of NP41 (0.1-20μM) and NP42 (0.1-1μM), and high concentrations of NP41 (40μM) and NP42 (10-40μM) resulted in a return of p-ERK1/2 and p-p38 to control levels. We proposed that molecular mechanism of reproductive damage in Sertoli cells induced by NPs may be mediated by cell receptors and/or cell signaling pathways, and the effects may be related to the structure of NP isomer.

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http://dx.doi.org/10.1016/j.tox.2014.09.009DOI Listing

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