Search for dissertations about: "extracellular calcium"

Showing result 1 - 5 of 123 swedish dissertations containing the words extracellular calcium.

  2. 1. Intracellular components involved in parathyroid sensing of extracellular calcium

    Author : Isaac G. Onyango; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Biochemistry; Parathyroid hormone; secretion; Src kinase; ERK; PI 3-kinase; PKC; extracellular calcium; parathyroid cell; Biokemi; Biochemistry; Biokemi; Medical and Physiological Chemistry; medicinsk och fysiologisk kemi;

    Abstract : Parathyroid glands are the primary regulator of extracellular calcium ([Ca2+]e). Ca2+ plays a key role in many fundamental biological processes and is also an essential structural component of the skeleton. The parathyroid chief cells detect small changes in [Ca2+]e and respond by altering the secretion of parathyroid hormone (PTH). READ MORE

  4. 2. Calcium channel activity and force regulation in smooth muscle: Effects of polyamines and growth stimulation

    Author : Maria Gomez; Kardiovaskulär forskning - immunitet och ateroskleros; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; verapamil; tissue culture; portal vein; patch-clamp; calcium; spermidine; spermine; polyamines; excitation-contraction; smooth muscle; calcium channel; ionomycin.; Physiology; Fysiologi;

    Abstract : The initial signal for contraction in smooth muscle is an increase in [Ca2+]i. Ca2+ ions can either enter the cytosol from the extracellular medium or be released from intracellular stores. Voltage-operated Ca2+ channels (VOC) play a dominant role in the activation of smooth muscle contraction. READ MORE

  5. 3. Calcium and Phospholipases in Orexin Receptor Signaling

    Author : Lisa Johansson; Jyrki Kukkonen; Karl Åkerman; Christopher S. Leonard; Uppsala universitet; []
    Keywords : Physiology; orexin; receptor; calcium; phospholipase; cell signaling; GPCR; Fysiologi;

    Abstract : The neuropeptides orexin-A and -B act as endogenous ligands for G-protein-coupled receptors (GPCRs) called OX1 and OX2 receptors. Previous observations have established that orexin receptors have an ability to couple to different G-proteins and signaling pathways and induce Ca2+ elevations via both receptor-operated Ca2+ channels (ROCs) and store-operated Ca2+ channels (SOCs). READ MORE

  6. 4. Calreticulins- Calcium-Binding Proteins with Functional Diversity and Evolutionary Duality

    Author : Staffan Persson; Biokemi och Strukturbiologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Plant biochemistry; plant; isoforms; evolution; diversity; differential regulation; chaperone; calnexin; calmegin; calcium; Arabidopsis; calreticulin; Växtbiokemi;

    Abstract : Calreticulin is a multifunctional protein mainly localized in the endoplasmic reticulum in eukaryotic organisms, except yeasts. The protein comprises three distinct regions: the N-terminal N domain, the C-terminal C domain, and the central P domain, reflecting the functional diversity of calreticulin. READ MORE

  7. 5. Calcium Responses in the Renal Afferent Arteriole to Angiotensin II and Norepinephrine Stimulation

    Author : Mark Kornfeld; Klinisk neurofysiologi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; norepinephrine; angiotensin II; smooth muscle cells; afferent arteriole; calcium; Kidney; renal hemodynamics; Physiology; Fysiologi;

    Abstract : 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. READ MORE