Search for dissertations about: "Anders Tengholm"

Showing result 1 - 5 of 13 swedish dissertations containing the words Anders Tengholm.

  2. 1. Epac2 signaling at the β-cell plasma membrane

    Author : Ida Alenkvist; Anders Tengholm; Olga Göransson; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; β-cell; insulin secretion; cAMP; Ca2 ; Epac; Rap; exocytosis; sulfonylurea; Medical Cell Biology; Medicinsk cellbiologi;

    Abstract : Secretion of appropriate amounts of insulin from pancreatic β-cells is crucial for glucose homeostasis. The β-cells release insulin in response to glucose and other nutrients, hormones and neurotransmitters, which trigger intracellular signaling cascades, that result in exocytotic fusion of insulin-containing vesicles with the plasma membrane. READ MORE

  4. 2. Oscillatory Signaling and Insulin Secretion from Single ß-cells

    Author : Olof Idevall Hagren; Anders Tengholm; Erik Gylfe; Leslie Satin; Uppsala universitet; []
    Keywords : 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;

    Abstract : 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. READ MORE

  5. 3. Studies on molecular mechanisms in calcium signaling and cellular energy consumption

    Author : Kalaiselvan Krishnan; Hjalmar Brismar; Anders Tengholm; KTH; []
    Keywords : ca2 signaling; ATP; PercevalHR; NKA; diabetes; Angiotensin; Biological Physics; Biologisk fysik;

    Abstract : Ion signaling plays fundamental role in cell survival. Na+ and Ca2+ are critical players in ion signaling. Cells spend the major amount of energy to maintain and regulate Na+ and Ca2+ gradients across the cell membrane. Any disruption in cellular energy consumption by plasma membrane ATPases affects ion signaling and vice versa. READ MORE

  6. 4. ATP Dynamics in Pancreatic α- and β-cells

    Author : Jia Li; Anders Tengholm; Erik Gylfe; Hindrik Mulder; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; ATP; Ca2 ; β-cell; α-cell; SERCA; SOCE; muscarinic receptor; insulin secretion; glucagon secretion; Medical Cell Biology; Medicinsk cellbiologi;

    Abstract : Glucose metabolism in pancreatic α- and β-cells is believed to regulate secretion of glucagon and insulin, respectively. In β-cells, ATP links glucose metabolism to electrical activity and insulin secretion. READ MORE

  7. 5. MEKK-1 and NF-κB Signaling in Pancreatic Islet Cell Death

    Author : Dariush Mokhtari; Nils Welsh; Michael Welsh; Anders Tengholm; Shanta Persaud; Uppsala universitet; []
    Keywords : Cell biology; MEKK-1; JNK; human islets; β-cells; siRNA; apoptosis; cell death; MAPK; nitric oxide; cytokines; streptozotocin; c-Rel; NF-κB; Cellbiologi;

    Abstract : Type 1 diabetes is an autoimmune disease resulting in the selective destruction of the insulin producing β-cells in the pancreas. Pro-inflammatory cytokines and the free radical nitric oxide (NO) have been implicated in mediating the destruction of β-cells, possibly through activation of the mitogen activated protein kinases (MAPKs) JNK, ERK and p38. READ MORE