Literature DB >> 7355295

Intensity fluctuation spectroscopy monitors contractile activation in "resting" cardiac muscle.

D L Lappé, E G Lakatta.   

Abstract

Intensity fluctuations in a laser beam scattered by nonbeating isolated rat cardiac muscle varied directly with the calcium concentrations in the bathing fluid. The steady-state level of these fluctuations varied directly with calcium-dependent force suggesting that the intensity fluctuations reflect an interaction of calcium ions with the myofilaments. The demonstration that both a portion of resting force and the frequency of intensity fluctuations vary directly with calcium even in quiescent conditions indicates that some contractile activation is present in the resting muscle.

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Year:  1980        PMID： 7355295     DOI： 10.1126/science.7355295

Source DB:  PubMed          Journal:  Science        ISSN： 0036-8075            Impact factor:   47.728


  9 in total

Review 1.  SPontaneous Oscillatory Contraction (SPOC): auto-oscillations observed in striated muscle at partial activation.

Authors:  James Erle Wolfe; Shin'ichi Ishiwata; Filip Braet; Renee Whan; Yingying Su; Sean Lal; Cristobal G Dos Remedios
Journal:  Biophys Rev       Date:  2011-05-04

2.  Diastolic scattered light fluctuation, resting force and twitch force in mammalian cardiac muscle.

Authors:  E G Lakatta; D L Lappé
Journal:  J Physiol       Date:  1981-06       Impact factor: 5.182

3.  Cellular calcium fluctuations in mammalian heart: direct evidence from noise analysis of aequorin signals in Purkinje fibers.

Authors:  W G Wier; A A Kort; M D Stern; E G Lakatta; E Marban
Journal:  Proc Natl Acad Sci U S A       Date:  1983-12       Impact factor: 11.205

4.  14 beta-Hydroxyprogesterone binds to the digitalis receptor, inhibits the sodium pump and enhances cardiac contractility.

Authors:  D Bose; D Elliott; T Kobayashi; J F Templeton; V P Kumar; F S LaBella
Journal:  Br J Pharmacol       Date:  1988-02       Impact factor: 8.739

5.  Effects of caffeine and ryanodine on depression of post-rest tension development produced by Bay K 8644 in canine ventricular muscle.

Authors:  R A Bouchard; L V Hryshko; J K Saha; D Bose
Journal:  Br J Pharmacol       Date:  1989-08       Impact factor: 8.739

6.  Calcium cycling and contractile activation in intact mouse cardiac muscle.

Authors:  W D Gao; N G Perez; E Marban
Journal:  J Physiol       Date:  1998-02-15       Impact factor: 5.182

7.  The relationship between contraction and intracellular sodium in rat and guinea-pig ventricular myocytes.

Authors:  S M Harrison; E McCall; M R Boyett
Journal:  J Physiol       Date:  1992-04       Impact factor: 5.182

8.  Hypothermic cardioplegia reduces the occurrence of spontaneous diastolic myofilament motion of the ischemic-reperfused rat heart.

Authors:  J S Juggi; A G Abdulla; K S Bhatia; F K Ghaaedi; Y Makdisi; X Mathew
Journal:  Basic Res Cardiol       Date:  1995 Jul-Aug       Impact factor: 17.165

9.  Spontaneous contractions in rat cardiac trabeculae. Trigger mechanism and propagation velocity.

Authors:  M C Daniels; H E ter Keurs
Journal:  J Gen Physiol       Date:  1990-06       Impact factor: 4.086
  9 in total

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