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THE CA2+-ACTIVATED PHOTOPROTEIN OBELIN AS AN INDICATOR OF CALCIUM-TRANSPORT IN PROTEOLIPOSOMES CONTAINING MEMBRANES OF THE T-SYSTEM OF SKELETAL-MUSCLES [Text] / V. S. BONDAR [et al.] // Biochem.-Moscow. - 1991. - Vol. 56, Is. 5. - P546-550. - Cited References: 12 . - ISSN 0006-2979

РУБ Biochemistry & Molecular Biology
Рубрики:
CHANNEL
   CA-2+
   MODULATION
   BINDING
Кл.слова (ненормированные):
CA2+-TRANSPORT -- CA2+-ACTIVATED PHOTOPROTEIN OBELIN -- T-SYSTEM -- 1,4-DIHYDROPYRIDINES -- LIPOSOMES
Аннотация: Data are presented on the Ca2+-activated photoprotein obelin as an indicator of calcium transport in proteoliposomes. Proteoliposomes formed from lecithin and membranes of the T-system of rabbit skeletal muscles were found to exhibit permeability to calcium ions activated by 10(-5) M BAU K-8644; 5.10(-5) M nitrendipine inhibits the action of BAU K-8644. Liposomes did not exhibit sensitivity to the investigated agents. The Ca2+-activated photoprotein obelin is a promising tool for studying fast calcium currents.

Держатели документа:
ACAD SCI USSR,INST BIOPHYS,KRASNOYARSK,USSR
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
BONDAR, V.S.; VYSOTSKII, E.S.; ROZHMANOVA, O.M.; VORONINA, S.G.

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Inhibitors of protein biosynthesis can stimulate proliferation of mouse hepatocytes in vitro [Text] / N. A. Setkov, A. V. Eremeev // Biol. Bull. - 2003. - Vol. 30, Is. 3. - P. 212-219, DOI 10.1023/A:1023843409416. - Cited References: 43 . - ISSN 1062-3590

РУБ Biology
Рубрики:
TRANSFORMING-GROWTH-FACTOR
   RAT-LIVER REGENERATION
   FACTOR-BETA
   DNA-SYNTHESIS
   PRIMARY CULTURE
   PARTIAL-HEPATECTOMY
   EPITHELIAL-CELLS
   EXPRESSION
   MECHANISMS
   MODULATION
Аннотация: Hepatocyte proliferation in the liver regenerating after partial hepatectomy ceases when the organ is restored, and the mechanism of this phenomenon is still unclear. In the experiments on fusing hepatocytes from the reoenerated mouse liver (15 days after partial hepatectomy) with NIH 3T3 mouse fibroblasts, we revealed no DNA synthesis in the nuclei of stimulated fibroblasts in heterokaryons (in the presence of hepatocyte nuclei), whereas DNA synthesis in nonfused cells was undisturbed. In this work, our purpose was to find out whether the suppression of DNA synthesis in heterokaryons could be due to the appearance in hepatocytes of some endogenous factors having an inhibitory effect on proliferation. To this end, hepatocytes from the mouse liver regenerated after partial hepatectomy were treated with cycloheximide for 1-4 h and were then fused with stimulated fibroblasts. Such a short-term treatment of hepatocytes with cycloheximide proved to result in the loss of their ability to inhibit DNA synthesis in the nuclei of stimulated or quiescent fibroblasts in heterokaryons, but hepatocytes proper actively proliferated in the medium with a low serum content (0.2%). When the mice with the liver reoenerated after partial hepatectomy were treated with a single sublethal dose of cycloheximide (3 mg/kg), their hepatocytes taken two days after this treatment had no inhibitory effect. Puromycin, another inhibitor of protein synthesis, had the same effect on hepatocytes. These results may be interpreted as evidence that the final stage of liver regeneration after damage is controlled by the factors having a C C negative effect on cell proliferation.

WOS
Держатели документа:
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Setkov, N.A.; Eremeev, A.V.

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