Results 211 to 220 of about 1,096,111 (252)
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Effects of Calcium Ionophores on the Synthesis and Release of Parathyroid Hormone
Endocrinology, 1977The parathyroid gland is unusual among endocrine and other secretory tissues in that increased concentrations of calcium in the extracellular fluid inhibit rather than facilitate or stimulate hormone secretion. To determine whether translocation of calcium ions across the plasma membrane might be involved in the secretory processes of the parathyroid ...
J F, Habener +4 more
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Effects of ‘calcium ionophore’ X537A on frog skeletal muscle
Nature, 1975CALCIUM ions are critically involved in the cholinergic neuromuscular transmission process. Presynaptically, Ca2+ is required in transmitter release1 while postsynaptically, it plays a role in acetylcholine-receptor kinetics2. Furthermore, Ca2+ sets off a chain of physicochemical events which leads to muscle contraction3.
D I, Devore, W L, Nastuk
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Journal of Immunology, 1996
Positive selection of immature thymocytes is a developmental process in which TCR ligation by low avidity interaction induces the generation of mature T cells. However, biochemical signals that can induce positive selection have been unclear.
Yousuke Takahama, Hiromitsu Nakauchi
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Positive selection of immature thymocytes is a developmental process in which TCR ligation by low avidity interaction induces the generation of mature T cells. However, biochemical signals that can induce positive selection have been unclear.
Yousuke Takahama, Hiromitsu Nakauchi
semanticscholar +1 more source
Calcium-dependent activation of human neutrophils by a synthetic ionophore
Biochemical and Biophysical Research Communications, 1989Synthetic block copolymers composed of polyoxyethylene and poly-oxypropylene have been demonstrated to possess ionophore activity selective for monovalent cations and to cause histamine release from mouse mast cells and human basophils. We now report calcium-dependent release of granule contents from human neutrophils by the most active of these agents,
P, Atkinson, R L, Berkow
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Ionophorous properties of neutral diamide ligands toward calcium
Biochemistry, 1977The ability of a series of aromatic and alicyclic analogues of 1,2-ethylenedioxydiacetic acids bearing N,N,N',N'-tetra-n-propyl amide or N-methyl-N-carbethoxypentyl amide linkages to enhance the rate of 45Ca2+ efflux from vesicles was studied. The ligands were less potent in enhancing membrane permeability to Ca2+ than A23187 and X537A.
T C, Wun, R, Bittman
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Journal of Immunology, 1997
Human peripheral blood contains a small subpopulation of immature dendritic cells (iDC) distinguished from circulating monocytes by their low expression of CD14.
B. Czerniecki +10 more
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Human peripheral blood contains a small subpopulation of immature dendritic cells (iDC) distinguished from circulating monocytes by their low expression of CD14.
B. Czerniecki +10 more
semanticscholar +1 more source
Action of insulin and cell calcium: Effect of ionophore A23187
The Journal of Membrane Biology, 1976We have measured the effects of the carboxylic Ca++ ionophore A23187 on muscle tension, resting potential and 3-O-methylglucose efflux. The ionophore produces an increase in tension that is dependent on external Ca++ concentration since (a) the contracture was blocked by removing external Ca++ and (b) its size was increased by raising outside Ca ...
S, Grinstein, D, Erlij
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The effects of calcium ionophore A23187 on interstitial cell steroidogenesis
Biochimica et Biophysica Acta (BBA) - General Subjects, 1980The present study was performed to evaluate the effects of calcium ionophore A23187 on adenosine 3',5'-monophosphate (cyclic AMP) and testosterone production in rat interstitial cells. Interstitial cells were incubated in Krebs-Ringer solution with varying amounts of luteinizing hormone, pregnenolone, or A23187.
T, Lin +3 more
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Calcium ionophore activity of a prostaglandin B1 derivative (PGBX)
Biochemical and Biophysical Research Communications, 1979Abstract A water soluble derivative of PGB1, designated PGBX, has been found to stimulate the release of Ca2+ from fragmented sarcoplasmic reticulum and heart mitochondria; its activity is almost two orders of magnitude greater than other prostaglandins.
S T, Ohnishi, T M, Devlin
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Calcium ionophore A23187 and lymphocyte activation
1976Publisher Summary This chapter discusses the calcium ionophore and lymphocyte activation. Lymphocyte transformation induced by the mitogenic plant lectins, phytohemagglutinin, and concanavalin A, requires extracellular ionized calcium. These lectins induce prompt increases in Ca2+ uptake.
W.C. GREENE, H.J. WEDNER, C.W. PARKER
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