A primary role for α-cells as amino acid sensors

ED Dean - Diabetes, 2020 - Am Diabetes Assoc
… proliferation led to the description of a conserved liver–α-cell axis where glucagon is a
critical regulator of amino acid homeostasis. In return, amino acids regulate α-cell function and …

[HTML][HTML] AMP-activated protein kinase: a new beta-cell glucose sensor? Regulation by amino acids and calcium ions

I Leclerc, GA Rutter - Diabetes, 2004 - Am Diabetes Assoc
… We conclude that metabolizable amino acids regulate AMPK in the β-cell via increases in …
on threonine-172 of the α-subunit in response to a decrease in cellular energy charge and a …

Glucose sensing in pancreatic β-cells: a model for the study of other glucose-regulated cells in gut, pancreas, and hypothalamus

FC Schuit, P Huypens, H Heimberg, DG Pipeleers - Diabetes, 2001 - Am Diabetes Assoc
… the function of pancreatic α-cells, hypothalamic neurons, and … The role of these proteins in
glucose sensing by α-cells is not … in fluorescence-activated cell sorter—purified α-cells (11), …

[HTML][HTML] PPARδ is a fatty acid sensor that enhances mitochondrial oxidation in insulin-secreting cells and protects against fatty acid-induced dysfunction

K Ravnskjaer, F Frigerio, M Boergesen, T Nielsen… - Journal of lipid …, 2010 - ASBMB
acid exposure. The presented results indicate that the nuclear receptor PPARδ is a … acid
sensor that adapts β-cell mitochondrial function to long-term changes in unsaturated fatty acid

Pancreatic β-cell identity, glucose sensing and the control of insulin secretion

GA Rutter, TJ Pullen, DJ Hodson… - Biochemical …, 2015 - portlandpress.com
… Although changes in the function of other islet cells, in particular the α-cell complement, are
… secretagogues including amino acids such as leucine, and the α-ketoacid ketoisocaproate …

[HTML][HTML] Glucose sensing in L cells: a primary cell study

F Reimann, AM Habib, G Tolhurst, HE Parker… - Cell metabolism, 2008 - cell.com
cells as well as pancreatic α cells. α-Gustducin expression was detectable in pancreatic α
cells and colonic L pos cells but was below the detection limit in most other cell preparations …

Distinguishing features of leucine and α-ketoisocaproate sensing in pancreatic β-cells

Z Gao, RA Young, G Li, H Najafi, C Buettger… - …, 2003 - academic.oup.com
… Many questions pertaining to the role of energy metabolism in β-cells stimulated
physiologically by amino acids remain unresolved (4). The mechanisms by which leucine and α-…

[HTML][HTML] The α-cell conundrum: ATP-sensitive K+ channels and glucose sensing

DA Jacobson, BL Wicksteed, LH Philipson - Diabetes, 2009 - ncbi.nlm.nih.gov
… within the α-cell. Glucagon secretion has been linked to several triggers: the α-cell detecting
a … (s) from the islet β-cell (eg, insulin, γ-aminobutyric acid [GABA], or Zn2+ ions) or the islet δ-…

[HTML][HTML] The aromatic amino acid sensor GPR142 controls metabolism through balanced regulation of pancreatic and gut hormones

O Rudenko, J Shang, A Munk, JP Ekberg… - Molecular …, 2019 - Elsevier
… in β- but also in α-cells of the islets as well as in enteroendocrine cells, and we confirm that
GPR142 is a highly selective sensor of essential aromatic amino acids, in particular Trp and …

New insights into amino acid metabolism, β-cell function and diabetes

P Newsholme, L Brennan, B Rubi, P Maechler - Clinical science, 2005 - portlandpress.com
… Certain amino acids are now known to play important nutrient-sensing roles involving the …
GABA released from pancreatic β-cells may regulate pancreatic α-cell glucagon release via …