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Impact of Environmental and Lifestyle Use of Chromium on Male Fertility: Focus on Antioxidant Activity and Oxidative Stress

期刊

ANTIOXIDANTS
卷 10, 期 9, 页码 -

出版社

MDPI
DOI: 10.3390/antiox10091365

关键词

trivalent chromium; hexavalent chromium; dietary supplements; antioxidants; male germ cells; fertility

资金

  1. Fundacao para a Ciencia e a Tecnologia-FCT [IFCT2015, PTDC/MEC-AND/28691/2017, UIDB/50006/2020, UIDB/00215/2020, UIDP/00215/2020]
  2. ITR-Laboratory for Integrative and Translational Research in Population Health [LA/P/0064/2020]
  3. Portuguese Society of Reproductive Medicine (SPMR)
  4. FCT/MCTES [UIDB/50011/2020, UIDP/50011/2020]
  5. Fundação para a Ciência e a Tecnologia [UIDP/00215/2020, PTDC/MEC-AND/28691/2017, UIDB/00215/2020] Funding Source: FCT

向作者/读者索取更多资源

Male reproductive tissues are sensitive to environmental stressors, with chromium compounds potentially impacting spermatogenesis. However, long-term effects of chromium picolinate and its impact on the antioxidant system of treated subjects remain poorly studied.
Male reproductive tissues are strongly susceptible to several environmental and lifestyle stressors. In general, male reproductive health is highly sensitive to oxidative stress, which results in reversible and/or irreversible changes in testosterone-producing cells, spermatogenesis, and sperm quality. Chromium compounds are widely used in the +3 and +6 valence states, as food supplements, and in the industrial field, respectively. Chromium (III) compounds, i.e., Cr(III)-tris-picolinate, [Cr(pic)(3)], known as chromium picolinate, are used as nutritional supplements for the control of diabetes, body weight, and muscular growth. However, previous studies showed that animal models exposed to chromium picolinate experienced degenerative changes in spermatogenesis. Contradictory results are documented in the literature and deserve discussion. Furthermore, the long-term effects of chromium picolinate on the antioxidant system of treated subjects have not been properly studied. Comprehensive studies on the role of this compound will help to establish the safe and useful use of chromium supplementation. On the other hand, chromium (VI) compounds are widely used in several industries, despite being well-known environmental pollutants (i.e., welding fumes). Chromium (VI) is known for its deleterious effects on male reproductive health as toxic, carcinogenic, and mutagenic. Previous studies have demonstrated severe lesions to mouse spermatogenesis after exposure to chromium (VI). However, workers worldwide are still exposed to hexavalent chromium, particularly in electronics and military industries. Data from the literature pinpoints mechanisms of oxidative stress induced by chromium compounds in somatic and germ cells that lead to apoptosis, thus underlining the impairment of fertility potential. In this review, we analyze the benefits and risks of chromium compounds on male fertility, as well as the mechanisms underlying (in)fertility outcomes. Although supplements with antioxidant properties may maximize male fertility, adverse effects need to be investigated and discussed.

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