Practolol, caffeine and calcium in the regulation of mechanical activity of the cardiac ventricle in Myxine glutinosa (L.).

  title={Practolol, caffeine and calcium in the regulation of mechanical activity of the cardiac ventricle in Myxine glutinosa (L.).},
  author={A Storesund and Karen B. Helle},
  journal={Comparative biochemistry and physiology. C: Comparative pharmacology},
  volume={52 1},
  • A. Storesund, K. Helle
  • Published 1 October 1975
  • Medicine, Biology
  • Comparative biochemistry and physiology. C: Comparative pharmacology
Absence of calcium paradox in the cardiac ventricle of the Atlantic hagfish (Myxine glutinosa).
Comparative aspects of adrenergic receptors in the hearts of lower vertebrates.
  • J. Ask
  • Biology
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  • 1983
A significant role of sarcoplasmic reticulum in cardiac contraction of a basal vertebrate, the river lamprey (Lampetra fluviatilis)
The hypothesis that intracellular calcium stores play a minor role in cardiac excitation–contraction coupling of a basal vertebrate, the lamprey, is tested.
Cardiovascular Function in Hagfishes
The systemic heart of the hagfish generates the lowest arterial pressure of any vertebrate animal, but cardiac output is comparable with that of many types of fish.
Dynamic behavior of type IV collagen at cell-biomaterial interface
The first study that addresses the relationship between microscopic observation for remodeling of surface associated Col IV and it´s dynamic behavior in nano scale finds that cells remodel Col IV in two ways: by mechanical reorganization and via proteolytic degradation.
Ultrastructural evidence for a direct connection between the myocardial granules and the sarcoplasmic reticulum in the cardiac ventricle of Myxine glutinosa (L.)
The core substance of the myocardial granules is shown to be uranophilic and in this respect similar to the granular cores within the lumen of the sarcoplasmic reticulum.
Cardiac Manifestations of Malignant Hyperthermia Susceptibility
Abnormal calcium release in the myocardium, as documented in skeletal muscle membranes, may be a unifying concept for the various manifestations described in Malignant hyperthermia.


The Relationship between Caffeine Contracture of Intact Muscle and the Effect of Caffeine on Reticulum
A drop in temperature increased the caffeine-induced Ca release while procaine inhibited it and inhibited the rate of Ca uptake, which may in part account for the prolongation of the active state caused by caffeine.
The Mechanism of the Action of Caffeine on Sarcoplasmic Reticulum
  • A. Weber
  • Biology
    The Journal of general physiology
  • 1968
Evidence is presented that caffeine does not act on the mitochondrial Ca uptake system and that its effect cannot be attributed to the accumulation of adenosine 3',5'-phosphate. Two distinct caffeine
Brief Reviews Exchange of Calcium Ions in the Mammalian Myocardium: Mechanisms and Physiological Significance
The following discussion summarizes the available information about the mechanisms of these Ca movements across the sarcolemma of cardiac cells and some basic relations between Ca movements and contractile activation are presented.
Influence of caffeine on force development and force-frequency relations in cat and rat heart muscle.
The effects of caffeine on isometric force development and force-frequency relationships were compared in cat and rat papillary muscle preparations to find out whether caffeine augmented or diminished contractile force in cat muscles, but caffeine depressed contractions under all conditions in rat muscles.
Theophylline as a tool in studies of the role of cyclic adenosine 3',5'-monophosphate in hormone-induced lipolysis.
The results suggest that activity of adipose tissue lipase is controlled by the antagonistic activities of the two enzymes, adenyl cyclase and phosphodiesterase, which indicate that the increased lipolysis is mediated through cyclic 39,59-AMP.
Influence of Caffeine and Other Inotropic Interventions on the Onset of Unloaded Shortening Velocity in Mammalian Heart Muscle: Time Course of Activation
It is concluded that velocity active state normally rises rapidly to a constant level which describes the contractile state, and valid time-independent force-peak velocity curves cannot be obtained in the presence of this drug.
Cardioregulation in an aneural heart.
  • D. Jensen
  • Biology
    Comparative biochemistry and physiology
  • 1961
Studies on catecholamine-containing granules of specific cells in cyclostome hearts.
Abstract : Preliminary experiments showed that incubation of isolated granules from the hearts of Petromyzon and Myxine with reserpine caused an increased rate of release of the catecholamines. In