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1. In glioma C6 cells, the stimulation of P2Y receptors by ADP, ATP and UTP initiated an increase in the intracellular Ca2+ concentration, in a process that involved the release of Ca2+ from InsP(3)-sensitive store and the capacitative, extracellular Ca2+ entry. The presence of external Ca2+ was not necessary to elevate Ca(2+). 2. The rank order of(More)
Although the mechanism of the capacitative Ca2+ entry is still a mysterious process, it has been presently accepted that it occurs through plasma membrane channel pores rather than through a carrier mechanism. As it has been proposed by Putney (Cell Calcium, 1986, 7, 1-12), Ca2+ entry is directly dependent on the state of filling of the endoplasmic(More)
It has been shown that the incorporation of [(14)C]serine into phosphatidylserine (PS) in isolated rat liver nuclei is intrinsic to this organelle as attested by marker enzyme activity. Serine incorporation into PS was the highest in nuclei depleted of the outer membrane of the nuclear envelope (nucleoplasts) and negligible in the outer membrane. Trypsin(More)
Few up to date studies on the influence of hormonal replacement therapy (HRT) on periodontium has been conducted on small groups of patients and the conclusions made may require further investigation on a larger population. It has been widely accepted that decreased estrogen levels in postmenopausal women are associated with a gradual loss of a bone density(More)
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