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- W2096733675 abstract "Summary. The ability of fowl spermatozoa to accumulate and de-esterify the intracellular fluorescent Ca2+ indicator fura-2 was established. The cytosolic Ca2+ concentrations, measured by this technique, did not change after the addition of 1 mmol EGTA l−1. Subsequently, addition of the calcium ionophore A23187 caused a reduction in cytosolic Ca2+ concentrations, presumably by efflux of Ca2+ from the spermatozoa. Intracellular free Ca2+ concentrations were then significantly increased by the addition of 1 mmol CaCl2 l−1. The motility of demembranated spermatozoa gradually decreased after the addition of EGTA alone or EGTA with A23187, but was instantly restored by the addition of CaCl2 in the presence of both EGTA and A23187. Unlike demembranated spermatozoa, intact spermatozoa maintained their motility, even after the addition of EGTA, but their motility was reduced by the addition of A23187 in the presence of EGTA. The addition of A23187 also reduced the rate of oxygen consumption, but not the ATP concentrations in intact spermatozoa. These results demonstrate that the motility and respiration of fowl spermatozoa are strongly influenced by their intracellular Ca2+ concentrations. Keywords: spermatozoa; calcium; fura-2; motility; oxygen uptake; fowl" @default.
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- W2096733675 date "1992-09-01" @default.
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- W2096733675 title "Intracellular free Ca2+ concentration in fowl spermatozoa and its relationship to motility and respiration in spermatozoa" @default.
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- W2096733675 doi "https://doi.org/10.1530/jrf.0.0960395" @default.
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