Add time:09/09/2019         Source:sciencedirect.com

Early studies on dietary nickel deprivation found decreased reproduction rate in pigs and decreased insemination and conception rates in goats. Studies from our laboratory demonstrated that nickel deprivation impaired male reproductive function of rats. A physiological amount of nickel modulates the function of cyclic nucleotide-gated cation channels (CNG channels) in vitro. Thus, because CNG channels have important roles in spermatozoa function, it was speculated that the impairment of reproduction by nickel deprivation was through an effect on CNG channels. Because CNG channels are found in retinal photoreceptor, olfactory receptor, and taste receptor cells, we hypothesized that nickel deprivation would also alter light/dark preference, odor preference to female rat urine, and taste preference/aversion in rats. In the light/dark Y-maze, nickel deprivation significantly decreased time spent in the dark arm by rats. The number of sniffs to estrous female urine was significantly increased only in nickel-supplemented rats. The number of licks at the saccharin bottle was significantly decreased by dietary nickel deprivation. These findings suggest that nickel has a biological role in the special senses: vision, olfaction and taste.

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