Title

Relationship of Ca2+ sparks to STOCs studied with 2D and 3D imaging in feline oesophageal smooth muscle cells

UMMS Affiliation

Department of Physiology and Biomedical Imaging Group

Date

3-7-2001

Document Type

Article

Subjects

Aniline Compounds; Animals; Calcium; Cats; Cell Membrane; Electric Conductivity; Esophagus; Fluorescent Dyes; Image Processing, Computer-Assisted; Imaging, Three-Dimensional; Muscle, Smooth; Patch-Clamp Techniques; Xanthenes

Disciplines

Life Sciences | Medicine and Health Sciences

Abstract

We recorded Ca2+ sparks and spontaneous transient outward currents (STOCs) simultaneously in smooth muscle cells using whole-cell patch recording and a unique, high-speed widefield digital imaging system to monitor fluo-3 fluorescence in both two and three dimensions (2D and 3D). In 2D imaging, the correlation between the amplitude of a spark and its corresponding STOC was a weak one, and 27 % of the sparks failed to cause STOCs. The STOCless sparks were not significantly different in amplitude from those that caused STOCs. Three-dimensional imaging disclosed that STOCless sparks were located close to the cell surface, and on average their apparent distance from the cell surface was not significantly different from the sparks that cause STOCs. Statistical evaluation of spark clusters disclosed that there were regions of the cell where the probability of spark occurrence was high and others where it was quite low.

Rights and Permissions

Citation: J Physiol. 2001 Mar 1;531(Pt 2):315-27.

Related Resources

Link to Article in PubMed

Journal Title

The Journal of physiology

PubMed ID

11230506