Avancerad sökning

Visar resultat 6 - 10 av 62 avhandlingar som matchar ovanstående sökkriterier.

1. 6. Oscillatory Signaling and Insulin Secretion from Single ß-cells

   Författare :Olof Idevall Hagren; Anders Tengholm; Erik Gylfe; Leslie Satin; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; cAMP; Ca2 ; oscillations; beta-cell; insulin secretion; evanescent wave microscopy; PIP3; PKA; Epac; Medical cell biology; Medicinsk cellbiologi; Medical Cell Biology; Medicinsk cellbiologi;

   Sammanfattning : cAMP and Ca2+ are key regulators of exocytosis in many cells, including insulin-secreting pancreatic β-cells. Glucose-stimulated insulin secretion from β-cells is pulsatile and driven by oscillations of the cytoplasmic Ca2+ concentration ([Ca2+]i), but little is known about the kinetics of cAMP signaling and the mechanisms of cAMP action. LÄS MER

3. 7. Regulation of Islet Function by the Neuropeptide PACAP

   Författare :Karin Filipsson; Diabetes - molekylär metabolism; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; postprandial; calcium; sodium; cAMP; intracellular signaling; glucagon; insulin; Pituitary adenylate cyclase-activating polypeptide; PACAP receptors; Endocrinology; secreting systems; diabetology; Endokrinologi; sekretion; diabetologi;

   Sammanfattning : It is known that parasympathetic, sympathetic and sensory nerves innervate the islets and that these nerves harbor both classical neurotransmitters and neuropeptides. However, the neural influence on islet hormone release is complex and not yet fully understood A recently discovered pancreatic neuropeptide is pituitary adenylate cyclase-activating polypeptide (PACAP). LÄS MER

4. 8. Oscillatory Ca2+ signaling in glucose-stimulated murine pancreatic β-cells : Modulation by amino acids, glucagon, caffeine and ryanodine

   Författare :Meftun Ahmed; Per Lindström; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cell biology; pancreatic β-cells; islets of Langerhans; glucose; Ca2 oscillations; Ca2 transients; potassium; ryanodine; caffeine; glucagon; cAMP; inositol 1; 4; 5-trisphosphate; fura-2; glycine; alanine; arginine; Ca2 channels; rats; lean mice; ob ob mice; leptin; Cellbiologi; Cell biology; Cellbiologi; medicinsk cellbiologi; Medical Cell Biology;

   Sammanfattning : Oscillations in cytoplasmic Ca2+ concentration ([Ca2+]i) is the key signal in glucose-stimulated β-cells governing pulsatile insulin release. The glucose response of mouse β-cells is often manifested as slow oscillations and rapid transients of [Ca2+] i. LÄS MER

5. 9. LKB1 signaling pathways in adipocytes - Focus on the AMPK-related kinase SIK2

   Författare :Emma Henriksson; Proteinfosforylering; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; adipocytes; signal transduction; protein phosphorylation; LKB1; SIK2; SIK3; cAMP;

   Sammanfattning : Adipose tissue does not only store and release energy in response to hormones, it is also known as an endocrine organ, secreting important factors and hormones that influence for example appetite and insulin sensitivity. The association of type 2 diabetes with obesity has been known for quite some time. LÄS MER

7. 10. Cardiovascular beta-adrenergic signaling : Maturation and programming effects of hypoxia in a chicken model

   Författare :Isa Lindgren; Jordi Altimiras; Eduardo Villamor; Laura Bennet; Linköpings universitet; []
   Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

   Sammanfattning : Despite the importance of β-adrenergic receptors (βARs) in cardiovascular disease, not much is known about how prenatal hypoxia effects βAR signaling in the postnatal animal. Thus, the aim of this thesis was to characterize the pre- and postnatal maturation of the cardiovascular βARs and the effects of chronic prenatal hypoxia on βAR signaling in the embryo and adult animal using the chicken as experimental model. LÄS MER