Changes in calcium transport in mammalian sperm mitochondria and plasma membrane irradiated at 633 nm (HeNe laser) |
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Authors: | H Breitbart T Levinshal N Cohen H Friedmann R Lubart |
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Affiliation: | Department of Life Sciences, Bar-Ilan University, Ramat Gan, Israel. |
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Abstract: | The effect of light on calcium transport in mammalian sperm mitochondria and plasma membrane was studied. Digitonine-treated spermatozoa and plasma membrane vesicles were irradiated with an HeNe laser at various powers and energy doses and Ca2+ uptake was measured by the filtration method. It was found that there is an accelerated Ca2+ uptake by the mitochondria after low power HeNe irradiation and inhibition after high power. The flux of Ca2+ from the mitochondria was also examined and was found to be unaffected by the HeNe light. The ATP-dependent Ca2+ uptake by the bovine plasma membrane vesicles was not changed by the HeNe irradiation. |
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