Sökning: "intracellular calcium"
Visar resultat 11 - 15 av 195 avhandlingar innehållade orden intracellular calcium.
11. Calcium Responses in the Renal Afferent Arteriole to Angiotensin II and Norepinephrine Stimulation
Sammanfattning : Studies were performed to investigate the influence of the vasoconstrictors angiotensin II (AII) and norepinephrine (NE) on calcium metabolism in smooth muscle cells of afferent arterioles. Fura-2 and image analysis techniques were used to evaluate calcium responses in the proximal and distal parts of afferent arterioles with attached glomeruli. LÄS MER
12. Modulation of the calcium-force relationship in smooth muscle by polyamines and metabolic inhibition
Sammanfattning : The relationship between intracellular free calcium ([Ca2+]i) and force in smooth muscle was investigated in receptor-coupled permeabilized preparations and by fluorimetry of the calcium indicator Fura 2 in intact smooth muscle. The time integral of spontaneous [Ca2+]i transients in the intact rat portal vein was decreased by cyanide and, during tonic contraction, cyanide reduced force without changing [Ca2+]i implying metabolic sensitivity of both membrane excitation and [Ca2+]i - activation of the contractile proteins. LÄS MER
13. Studies of nucleotide receptors-induced calcium response in glomerular mesangial cells and afferent arterioles
Sammanfattning : It is known that intracellular calcium concentration ([Ca2+]i) changes in rat glomerular mesangial cells (GMC) and rabbit afferent arterioles (AA) in response to extracellular nucleotides. We studied the nucleotide-induced calcium response in cultured GMC and AA. LÄS MER
14. Studies of individual pancreatic -cells : Electrophysiological analysis of rhythmic behaviour and development of new techniques
Sammanfattning : The insulin concentration in blood varies periodically, which is believed to prevent down-regulation of the hormone receptors. Loss of the regular insulin oscillations is considered to be an early sign of developing diabetes. LÄS MER
15. Studies of calcium binding proteins 1 and 2 and protein kinase CK2
Sammanfattning : The endoplasmic reticulum (ER) is a major intracellular compartment of eukaryotic cells and is the site of the synthesis and post-translational modification of both secretory and membrane glycoproteins. Upon cell rupture vesicles of several kinds are formed from cell membranes, mainly derived from ER and are called microsomes. LÄS MER