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Dynamic Imaging in Living Cells: Windows into Local Signaling

Highly localized changes in intracellular calcium concentration [Ca2+]i play a critical role in regulating numerous cellular functions, ranging from muscle contraction to neurotransmitter and hormone secretion to gene transcription. Fluorescent Ca2+ indicators have been invaluable tools in elucidating the role of localized changes in [Ca2+]i in regulating ion channels and other key proteins in various signaling pathways. Other techniques used to investigate localized changes in [Ca2+]i include approaches based on fluorescence resonance energy transfer, and electrophysiological measurements of ionic flux through Ca2+-sensitive channels. This Perspective discusses research using fluorescent Ca2+ indicators to study excitation-contraction coupling in cardiac myocytes, presenting both key findings and limitations of this approach. Complementary approaches useful in studying localized changes in Ca2+ and other second messengers (such as cyclic adenosine monophosphate) are also discussed.

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Classifications


Resource Type: Diagram, Illustration, Journal article/Issue, Review
Audience Level: Undergraduate upper division 15-16, Graduate, Professional (degree program)

Author and Copyright


Authors and Editors: Donald M. Bers of Department of Physiology, Stritch School of Medicine
Publisher: American Association for the Advancement of Science
Format: application/pdf, image/gif, image/jpeg, text/html
Copyright and other restrictions: Yes
Cost: Yes

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Collection:
STKE/Science Signaling


     
   

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