Abstract
Nonylphenol (NP) as an environment contaminant has been demonstrated to adversely affect male reproduction. The main objective of this study was to evaluate NP-induced oxidative stress and toxicity in testicular Sertoli cells. Sertoli cells were exposed to 10–40 μM NP for 24 h. Cell death and growth inhibition were observed by flow cytometric analysis and 3-[4,5-dimethylthiazol-2yl]-2,5-diphenyltetrazolium bromide (MTT) assay, while fluorescein diacetate (FDA) and propidium iodide (PI) staining was used to examine the morphological changes following NP exposure. Subsequently, we found that short-term treatment (2 h) of NP caused intracellular accumulation of reactive oxygen species (ROS), which was evaluated by loading of 2′,7′-dichlorodihydrofluorescein diacetate (DCFH-DA) without visible morphological changes. Loss of mitochondrial membrane potential (MMP) was detected following 12 and 24 h treatment of NP and assessment by Rhodamine 123 (Rh123) staining. In addition, incubation with NP for 12 h also increased lipid peroxidation of Sertoli cells. These results indicated that low micromolar concentrations of NP induce an adverse oxidative stress in rat Sertoli cells.
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