Visualizing subcellular rearrangements in intact β cells using soft x-ray tomography.
Journal
Science advances
ISSN: 2375-2548
Titre abrégé: Sci Adv
Pays: United States
ID NLM: 101653440
Informations de publication
Date de publication:
12 2020
12 2020
Historique:
received:
15
05
2020
accepted:
21
10
2020
entrez:
10
12
2020
pubmed:
11
12
2020
medline:
11
12
2020
Statut:
epublish
Résumé
Characterizing relationships between cell structures and functions requires mesoscale mapping of intact cells showing subcellular rearrangements following stimulation; however, current approaches are limited in this regard. Here, we report a unique application of soft x-ray tomography to generate three-dimensional reconstructions of whole pancreatic β cells at different time points following glucose-stimulated insulin secretion. Reconstructions following stimulation showed distinct insulin vesicle distribution patterns reflective of altered vesicle pool sizes as they travel through the secretory pathway. Our results show that glucose stimulation caused rapid changes in biochemical composition and/or density of insulin packing, increased mitochondrial volume, and closer proximity of insulin vesicles to mitochondria. Costimulation with exendin-4 (a glucagon-like peptide-1 receptor agonist) prolonged these effects and increased insulin packaging efficiency and vesicle maturation. This study provides unique perspectives on the coordinated structural reorganization and interactions of organelles that dictate cell responses.
Identifiants
pubmed: 33298443
pii: 6/50/eabc8262
doi: 10.1126/sciadv.abc8262
pmc: PMC7725475
pii:
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Research Support, N.I.H., Extramural
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : NIGMS NIH HHS
ID : P30 GM138441
Pays : United States
Organisme : NIGMS NIH HHS
ID : P41 GM103445
Pays : United States
Organisme : NIGMS NIH HHS
ID : P41 GM109824
Pays : United States
Organisme : NIGMS NIH HHS
ID : R01 GM083960
Pays : United States
Informations de copyright
Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY).
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