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Toxicol Appl Pharmacol. 2016 Nov 1;310:205-214. doi: 10.1016/j.taap.2016.09.018. Epub 2016 Sep 20.

Choline supplementation alleviates fluoride-induced testicular toxicity by restoring the NGF and MEK expression in mice.

Author information

1
Shanxi Key Laboratory of Ecological Animal Science and Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China.
2
Shanxi Key Laboratory of Ecological Animal Science and Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China; Veterinary Station in Chen Villages of Lin Country, Linxian, Shanxi 033200, China.
3
Division of Endocrinology and Metabolism, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA; Division of Endocrinology and Metabolism, Department of Medicine, The First Affiliated Hospital of Shantou University Medical College, Shantou, China.
4
Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA 22908, USA.
5
Shanxi Key Laboratory of Ecological Animal Science and Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China. Electronic address: wangjd53@outlook.com.

Abstract

Fluoride is known to cause male reproductive toxicity, and the elucidation of its underlying mechanisms is an ongoing research focus in reproductive toxicology and epidemiology. Choline, an essential nutrient, has been extensively studied for its benefits in nervous system yet was rarely discussed for its prospective effect in male reproductive system. This study aims to explore the potential protective role of choline against NaF-induced male reproductive toxicity via MAPK pathway. The male mice were administrated by 150mg/L NaF in drinking water, 5.75g/kg choline in diet, and their combination respectively from maternal gestation to postnatal 15weeks. The results showed that fluoride exposure reduced body weight growth, lowered sperm count and survival percentages, altered testicular histology, down-regulated the mRNA expressions of NGF, Ras, Raf, and MEK genes in testes, as well as significantly decreased the expressions of both NGF and phosphor-MEK proteins in testes. Examination of data from choline-treated mice revealed that choline supplementation ameliorated these fluoride-induced changes. Taken together, our findings suggest that choline supplementation alleviates fluoride-induced testicular toxicity by restoring the NGF and phosphor-MEK expression. The suitable dosage and supplementation periods of choline await further exploration.

KEYWORDS:

Choline supplementation; Fluoride; MEK; NGF; Testicular toxicity

PMID:
27664006
DOI:
10.1016/j.taap.2016.09.018
[Indexed for MEDLINE]

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