Release of insulin granules by simultaneous, high-speed correlative SICM-FCM
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Published version
Author(s)
Type
Journal Article
Abstract
Exocytosis of peptides and steroids stored in a dense core vesicular (DCV) form is the final step of every secretory pathway, indispensable for the function of nervous, endocrine and immune systems. The lack of live imaging techniques capable of direct, label‐free visualisation of DCV release makes many aspects of the exocytotic process inaccessible to investigation. We describe the application of correlative scanning ion conductance and fluorescence confocal microscopy (SICM‐FCM) to study the exocytosis of individual granules of insulin from the top, nonadherent, surface of pancreatic β‐cells. Using SICM‐FCM, we were first to directly follow the topographical changes associated with physiologically induced release of insulin DCVs. This allowed us to report the kinetics of the full fusion of the insulin vesicle as well as the subsequent solubilisation of the released insulin crystal.
Date Issued
2020-10-30
Date Acceptance
2020-10-19
Citation
Journal of Microscopy, 2020, 282 (1), pp.21-29
ISSN
0022-2720
Publisher
Wiley
Start Page
21
End Page
29
Journal / Book Title
Journal of Microscopy
Volume
282
Issue
1
Copyright Statement
© 2020 The Authors. Journal of Microscopy published by John Wiley & Sons Ltd on behalf of Royal Microscopical Society
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
License URL
Sponsor
World Premier International Research Centre Initiative (WPI)
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000583504000001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
WMEP_P73514
Subjects
Science & Technology
Technology
Microscopy
hormone
secretion
dense core vesicle
fusion pore
PANCREATIC BETA-CELLS
FLUORESCENT PROTEIN
EXOCYTOSIS
SECRETION
MICROSCOPY
FUSION
ASSOCIATION
DYNAMICS
Publication Status
Published
Date Publish Online
2020-10-22