Hoboth, P. ; Müller, A. ; Ivanova, A. ; Mziaut, H. ; Dehghany, J.* ; Sönmez, A. ; Lachnit, M. ; Meyer-Hermann, M.* ; Kalaidzidis, Y.* ; Solimena, M.
Aged insulin granules display reduced microtubule-dependent mobility and are disposed within actin-positive multigranular bodies.
Proc. Natl. Acad. Sci. U.S.A. 112, E667-E676 (2015)
Insulin secretion is key for glucose homeostasis. Insulin secretory granules (SGs) exist in different functional pools, with young SGs being more mobile and preferentially secreted. However, the principles governing the mobility of age-distinct SGs remain undefined. Using the time-reporter insulin-SNAP to track age-distinct SGs we now show that their dynamics can be classified into three components: highly dynamic, restricted, and nearly immobile. Young SGs display all three components, whereas old SGs are either restricted or nearly immobile. Both glucose stimulation and F-actin depolymerization recruit a fraction of nearly immobile young, but not old, SGs for highly dynamic, microtubule-dependent transport. Moreover, F-actin marks multigranular bodies/lysosomes containing aged SGs. These data demonstrate that SGs lose their responsiveness to glucose stimulation and competence for microtubule-mediated transport over time while changing their relationship with F-actin.
Impact Factor
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Times Cited
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Cited By
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Typ der Hochschulschrift
Herausgeber
Schlagwörter
Bayesian Probability Theory ; Diabetes ; Islets ; Processivity ; Secretion; Pancreatic Beta-cell; Molecules In-vivo; Secretory Granules; Fusion Proteins; O-6-alkylguanine-dna Alkyltransferase; Microfilamentous System; Diabetes-mellitus; Glucose-tolerance; Rat Pancreas; B-cell
Keywords plus
Sprache
englisch
Veröffentlichungsjahr
2015
Prepublished im Jahr
HGF-Berichtsjahr
2015
ISSN (print) / ISBN
0027-8424
e-ISSN
1091-6490
ISBN
Bandtitel
Konferenztitel
Konferzenzdatum
Konferenzort
Konferenzband
Quellenangaben
Band: 112,
Heft: 7,
Seiten: E667-E676
Artikelnummer: ,
Supplement: ,
Reihe
Verlag
National Academy of Sciences
Verlagsort
Washington
Tag d. mündl. Prüfung
0000-00-00
Betreuer
Gutachter
Prüfer
Topic
Hochschule
Hochschulort
Fakultät
Veröffentlichungsdatum
0000-00-00
Anmeldedatum
0000-00-00
Anmelder/Inhaber
weitere Inhaber
Anmeldeland
Priorität
Begutachtungsstatus
Peer reviewed
Institut(e)
Institute of Pancreatic Islet Research (IPI)
POF Topic(s)
90000 - German Center for Diabetes Research
Forschungsfeld(er)
Helmholtz Diabetes Center
PSP-Element(e)
G-502600-001
Förderungen
Copyright
Erfassungsdatum
2015-02-05