By Nancy J. Rusch, William J. Stekiel (auth.), Robert H. Cox (eds.)
Hypertension is famous to be one of many significant possibility components for the advance of peripheral vascular affliction. the decade has witnessed numerous significant advances in treatment for high blood pressure, together with the advance of angiotensin-converting enzyme inhibitors and calcium channel blockers. those compounds have tremendously stronger the power to manage blood strain and to lessen the effect of this hazard issue on morbidity and mortality. even with those advances, heart problems is still an immense illness in latest industrialized nations with comparable deaths exceeding these from all different explanations mixed. unlike those advances in treatment, our knowing of the elemental mechanisms answerable for the pathogenesis of high blood pressure continues to be incomplete. contemporary stories have produced new insights into the character of the law of muscle contraction in either center and blood vessels in addition to the alterations in muscle functionality that ensue in high blood pressure. even though, the consequences of antihypertensive treatment, either by way of restoring general functionality and in generating reversal of hypertension-associated alterations, has no longer been as completely studied, in particular within the vasculature. reports within the middle recommend that the efficacy of alternative healing brokers in restoring common functionality and reversing hypertensive adjustments fluctuate considerably with the mechanism of motion of the healing agent. It has additionally been lately decided that a few healing brokers produce opposed results on plasma lipid profiles, which can bring about the secondary acceleration of the atherosclerotic strategy, whereas while normalizing blood pressure.
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Extra resources for Cellular and Molecular Mechanisms in Hypertension
56. 57. Dantzig JA, Goldman YEo Suppression of muscle contraction by vanadate: Mechanical and ligand binding studies on glycerolextracted rabbit fibers. J Gen Physiol 86: 305, 1985. Umekawa H, Hidaka H. Phosphorylation of caldesmon by protein kinase C. Biochem Biophys Res Comm 132: 56, 1985. Park S, Rasmussen H. Carbachol-induced protein phosphorylation changes in bovine tracheal smooth muscle. J BioI Chem 261: 15734, 1986. 25 POTASSIUM CHANNEL ACTNATORS IN VASCULAR SMOOTH MUSCLE Robert H. Cox Bockus Research Institute The Graduate Hospital and Department of Physiology The University of Pennsylvania Philadelphia, PA INTRODUCTION Ion channels play an important role in the function of all cells.
The Na+ channel was the first recognized as the site of action of therapeutically important compounds such as the local anesthetics. Over the last decade, Ca 2 + channels have been the prominent site for the development of new modulatory agents. This activity has witnessed the development of numerous compounds with varying tissue specificity that modulate Ca2 + channel function. More recently, K+ channels have also become an important site of interest for the development of new therapeutic compounds (1).
Al . Figure 5. Na+,K+-ATPase alpha subunit mRNAs in aortas from hypertensive rats. (A) mRNA of Na+,K+-ATPase subunits alpha-1 and alpha-2 were analyzed in separate RNA blots with equivalent amounts of total cellular RNA derived from pooled aortas from hypertensive, uninephrectomized rats treated with DOC/salt (H), control uninephrectomized rats (C1), and control normotensive DOC-low salt rats (C2). The specific hybridizing bands to the respective probes are indicated by arrowheads. Two hybridizing bands are detected in alpha-2, representing two sizes of mRNAs.