S. Kawaii et al., MEASUREMENT OF INTRACELLULAR IONIZED CALCIUM IN A FREE-LIVING SOIL NEMATODE, CAENORHABDITIS-ELEGANS, Bioscience, biotechnology, and biochemistry, 57(7), 1993, pp. 1115-1118
A calcium chelating fluorescence indicator, fura-2, was used to measur
e intracellular ionized calcium in Caenorhabditis elegans. The indicat
or loading process was harmless to the nematode, and completed within
2-3 h. Fura-2 was loaded mainly at its intestinal tract. The effects o
f DOPA on locomotion and the level of intracellular calcium were inves
tigated and measured by using a microfluorometer. The addition of DOPA
temporarily increased Ca2+!i for several minutes.