Free cyclic AMP increases in PC12 cells on depolarization.
The temporal dynamics of the intracellular second messenger cyclic AMP (cAMP) were monitored in living PC12 cells by digital fluorescence ratio imaging using FlCRh, a single-excitation dual-emission cAMP indicator. When the cells were depolarized by exposure to high K+, the free cAMP concentration was elevated, and then slowly decreased back to resting levels when the depolarizing stimulus was removed. Furthermore, the cAMP elevation due to depolarization decreased with successive depolarizations.
Agnihotri
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N
Department of Biological and Agricultural Engineering, University of Georgia, Athens 30602, USA.
Kisaalita
W S
WS
Keith
C H
CH
D000200:Action Potentials / Q000502:physiology*; D000818:Animals; D000242:Cyclic AMP / Q000502:physiology*; D005453:Fluorescence; D016716:PC12 Cells / Q000502:physiology*; D011188:Potassium / Q000502:physiology*; D051381:Rats
D000242:Cyclic AMP; D011188:Potassium