Calcium currents and contraction in frog atrial trabeculae.

Abstract:

:The properties of two types of calcium current (ICa(T) and ICa(L)) and their relationship with contraction were studied in isolated frog atrial trabeculae using the double mannitol gap technique. In Ringer solution containing TTX the calcium currents observed are similar to the ICa(T) and ICa(L) found in single frog atrial cells. The results obtained by using inorganic calcium channel blockers have shown that the phasic contraction appears only when ICa(T) and ICa(L) are simultaneously present. It is proposed that ICa(T) loads the sarcoplasmic reticulum (SR) while ICa(L) triggers Ca2+ release from the SR.

journal_name

Exp Physiol

journal_title

Experimental physiology

authors

Badaoui A,Léoty C

doi

10.1113/expphysiol.1994.sp003812

subject

Has Abstract

pub_date

1994-09-01 00:00:00

pages

839-50

issue

5

eissn

0958-0670

issn

1469-445X

journal_volume

79

pub_type

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