Publications by authors named "E M Plisetskaia"

Growth-stimulating properties of insulins from cyclostomes, teleosts and mammals were evaluated by their capacity to promote the uptake of [35S]-sulfate by fish branchial cartilages. It was shown that all the tested hormones exhibit promotor properties increasing the uptake of labeled sulfate by 1.5-3 times.

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Marine bivalve molluscs, the mussel Mytilus galloprovincialis aud the scallop Chlamys (Flexopecten) glaber ponticus, have been injected (intramuscularly or in the haemolymph) with glucose, mammalian insulin, insulin (or insulin-like substance) from molluscs, and anti-insulin serum, checking changes in glucose and fatty acid content of the haemolymph as well as in the content of glycogen and the activity of glycogen synthetase in muscles. After glucose injections, studies were also made on the level of IRI in the haemolymph. Comparison of the data obtained in the present work with those reported earlier for freshwater bivalve molluscs suggests that: 1) metabolic shifts induced by anti-insulin serum are more rapid in vigorous scallops than in sedentary mussels; 2) molluscan insulin (or insulin-like substance) exerts the same effect on metabolic parameters of the molluscs, as mammalian insulin exerts in vertebrates.

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Some experiments including glucose loading, insulin or antiinsulin serum injection and in vitro investigations on bivalve freshwater molluscs Anodonta cygnea and Unio pectorum were carried out. All the treatments used were found to cause shifts in glycaemic level, glycogen content in muscles and glycogen-synthetase activity in the same organ, glucose uptake by muscle slices, IRI content in the haemolymph and in gut extracts and PAF-positivity in the gut cells. It was demonstrated earlier that PAF-positive cells located in the gut epithelium of the same molluscs show immunostaining with mammalian anti-insulin serum which indicates the production of insulin or insulin-like substance.

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