Effect of light on calcium transport in bull sperm cells.
The effect of light on calcium transport was studied. Bull sperm cells were irradiated with an He-Ne (630 mm) laser and a 780 nm diode laser at various energy doses, and 45Ca2+ uptake was measured by the filtration technique. It was found that there is an accelerated Ca2+ transport in the irradiated cells, which means that laser light can stimulate Ca2+ exchange through the cell membrane. This may cause transient changes in the cytoplasmic Ca2+ concentration which, in spermatozoa, has a regulatory role in control of motility and acrosome reaction, and in other cells can trigger mitosis.
Lubart
R
R
Department of Physics, Bar-Ilan University, Ramat Gan, Israel.
Friedmann
H
H
Levinshal
T
T
Lavie
R
R
Breitbart
H
H
D000818:Animals; D001692:Biological Transport / Q000528:radiation effects; D002118:Calcium / Q000378:metabolism*; D002417:Cattle; D066298:In Vitro Techniques; D007700:Kinetics; D007834:Lasers; D008027:Light; D008297:Male; D013094:Spermatozoa / Q000378:metabolism / Q000528:radiation effects*
D002118:Calcium