[Distribution of neurospecific cardioactive protein-hormone complex in the rat body during experimental myocardial ischemia]. / Raspredelenie neirospetsificheskogo kardioaktivnogo belok-gormonal'nogo kompleksa v organizme krysy pri éksperimental'noi ishemii miokarda.

For more than 25 years the chemistry and the function of the protein-hormonal complexes (produced by magnocellular nuclei of human and same animals) have been studied. The methods of radioimmunological analyses (RIA) for the detection of new neuropecific cardioactive protein-hormone "K" (RHK) in rat organism with myocardial ischemia has been developed. Concentration of PHK in various regions of the brain by RIA a four days after the occlusion of the carotid artery has a sharp decrease. Particularly concentration of PHK decreases 100-fold in the cerebral cortex. At the same time the level of PHK content in the blood increased from 13 +/- 0.85 to 630 +/- 3.9 ng/ml. The maximum concentration of PHK shows a sharp rise in the spleen 200-fold of their original level. This distribution pattern implies that PHK may be of importance for peripheral tissues and to the scarring in heart neurosis zone.

[Regional, cellular, subcellular distribution of neurospecific protein-hormonal complexes]. / Regional'noe, kletochnoe, subkletochnoe raspredelenie neirospetsificheskikh belok-gormonal'nykh kompleksov.

A sensitive radioimmunological assay (RIA) has been developed to detect the tissue specificity and subcellular localization of three specific protein-hormonal complexes (PHC) of the hypothalamus which have a regulatory function in the brain and visceral organs. Using the highly specific rabbit antisera to beef PHC an order of increasing immunoreactivity in different areas of CNS is as follows: hypothalamus, cerebellum, occipital cortex. The PHC-like immunoreactivity (IR) is found in the neurosecretory granules of the hypothalamo-neurohypophyseal system (about 30%) and in the synaptosomal fraction (70%). In the myelin, mitochondrial and nuclear fractions the PHC-like IR is not revealed. IR of PHC is 1000-fold higher in the brain than in visceral organs (heart, skeletal muscles, adrenals, pancreas and blood serum). A possible role of the PHC as markers of the neuroendocrine cells is discussed.

[Radioimmunological characteristics of the distribution of hypothalamic glycoprotein--a precursor of cardiotropic neurohormone C--in the brain and viscera]. / Radioimmunologicheskaia kharakteristika raspredeleniia gipotalamicheskogo glikoproteina--predshestvennika kardiotropnogo neirogormona C v mozge i vistseral'nykh organakh.

A radioimmunological procedure is described for estimation of cardiotropic glycoprotein (BNS), isolated from bovine hypothalamus, in various brain structures and some visceral tissues. The rabbit antiserum towards bovine BNS was used at a dilution 1:10,000. Concentration of BNS measured by the procedure in cat hypothalamus and cerebellum was equal to 1.5 ng and 0.84 ng/g of wet tissue, respectively. The immunoreactive activity of BNS was also found in adrenal glands, heart and skeletal muscles; it was not observed in kidney, lung and pancreas. Content of BNS in cat blood was 10 ng/ml. BNS appears to penetrate into circulating blood.

[Molecular mechanisms of hypothalamic hexapeptide regulation of the links in glycogen metabolism]. / Molekuliarnye mekhanizmy reguliatsii gipotalamicheskim geksapeptidom nekotorykh zven'ev obmena glikogena.

Alterations in content of glycogen as well as in activity of phosphorylase and phosphoprotein phosphatase were studied in various rat tissues after intravenous administration of a new hypothalamic hexapeptide Tyr-Gly-Leu-Pro-Gly-NH2. An increase in phosphoprotein phosphatase activity was observed in heart muscle, which correlated with transformation of phosphorylase A to the B form and with accumulation of glycogen. The opposite effect was found in liver tissue and sceletal muscle.