Odorant-Evoked Increase in Cytosolic Free Calcium in Cultured Antennal Neurons of Blowflies(Physiology)

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The responses of cultured antennal neurons of blowflies to odorants, ethyl acetate and isovaleric acid, were measured using fura-2, a calcium-sensitive fluorescent dye. Both odorants induced increases in cytosolic free calcium concentration ([Ca24],) in the neurons. The peak [Ca^<2+>]_I was 1.1 to 7.5 times as high as [Ca^<2+>]_I of the resting neurons. The increase in [Ca^<2+>]_I occurred within 10 sec after exposure to the odorants in most neurons. It, however, occurred up to 110 sec after the odorant exposure in some neurons. As [Ca^<2+>]_I increase was diminished upon removing Ca^<2+> from saline, [Ca^<2+>], increase was assumed to be due to Ca^<2+> influx. [Ca^<2+>]_I increase was also induced by introducing forskolin and membrane-permeable analogues of cyclic AMP and GMP.
社団法人日本動物学会の論文
1998-10-15