Catechol Amine Metabolism

Catechol Amine Metabolism in Essential Hypertension.

Plasma Catechol Amine Concentrations

T HERE have been many reports that the adrenergic eateehol amines (epinephrine and norepinephrine) cause a wastage of oxygen by the heart muscle that exceeds the simultaneous oxidative energy requirements for mechanical work. Recently, however, Katz' suggested a "stress-adapting mechaiiisms" related to the catechol amines that appears to make the heart more efficient in the utilization of oxyge...

Catechol Amine Excretion by Duodenal Ulcer

Despite recognition of the importance of central nervous system function in the control of gastric secretory and motor processes and the general acceptance of the concept that duodenal ulcer is associated with abnormal nervous influence upon the stomach, there is little objective evidence concerning the exact mechanisms involved. The main hindrance to collecting data for examining the relations...

Metabolism of catechol estrogens by erythrocyte catechol-O methyltransferase.

Fishman and Tulchinsky (1) present evidence that the catechol estrogen 2hydroxyestrone suppresses serum prolactin in normal ovulatory young women. However, in 3 of the 12 subjects studied the authors were unable to suppress serum prolactin and suggested that prolactin response to 2-hydroxyestrone is subjectand not time-dependent. In a study designed to evaluate the kinetics of catechol estrogen...

Semiquinone anion radicals of catechol(amine)s, catechol estrogens, and their metal ion complexes.

The characterization and identification of semiquinone radicals from catechol(amine)s and catechol estrogens by electron spin resonance spectroscopy is addressed. The use of diamagnetic metal ions, especially Mg2+ and Zn2+ ions, to detect transient semiquinone radicals in biological systems and to monitor their reactions, is discussed. A brief account of the identification and reactions of quin...