Effect of histamine on the energy metabolism of K+-depolarized hog carotid artery.
In a previous study (Peterson and Glück, 1982), activation of hog carotid artery with high-K+ medium caused no increase in aerobic glycolysis (lactic acid production). In contrast, histamine alone is found to stimulate aerobic glycolysis in a tension-dependent fashion (GLück and Paul, 1977). In this study, the addition of histamine to the already K+-depolarized hog carotid artery induced additional contraction, elevated tissue cyclic adenosine 3',5'-monophosphate [cAMP] levels, coupled the rate of aerobic glycolysis to external [Ca++] and isometric tension, and caused suprabasal energy utilization to exceed that required to support the contraction alone by approximately 25%. Increased cytoplasmic free-[Ca++] per se does not stimulate aerobic glycolysis. In the presence of histamine, however, aerobic glycolysis is Ca++-sensitive. Whereas a cycle of Ca++ depletion and restoration has only a small effect on basal metabolic rates in arteries activated with high-K+ alone, the same procedure with arteries stimulated by high-K+ with added histamine causes a dramatic shift in basal metabolic rates toward higher levels of glycolysis.
D000255:Adenosine Triphosphate / Q000096:biosynthesis; D000818:Animals; D002118:Calcium / Q000378:metabolism; D002339:Carotid Arteries / Q000378:metabolism; D000242:Cyclic AMP / Q000096:biosynthesis; D004734:Energy Metabolism / Q000187:drug effects*; D006632:Histamine / Q000494:pharmacology*; D007773:Lactates / Q000096:biosynthesis; D019344:Lactic Acid; D009119:Muscle Contraction / Q000187:drug effects*; D009131:Muscle, Smooth, Vascular / Q000378:metabolism*; D010101:Oxygen Consumption / Q000187:drug effects; D011188:Potassium / Q000378:metabolism; D013552:Swine
D007773:Lactates; D019344:Lactic Acid; D006632:Histamine; D000255:Adenosine Triphosphate; D000242:Cyclic AMP; D011188:Potassium; D002118:Calcium