Release of insulin granules by simultaneous, high-speed correlative SICM-FCM

J Bednarska; P Novak; Yuri E. Korchev; Patrick Rorsman; Andrei Tarasov; Andrew Shevchuk

doi:10.1111/jmi.12972

Release of insulin granules by simultaneous, high-speed correlative SICM-FCM

J Bednarska, P Novak, Yuri E. Korchev, Patrick Rorsman, Andrei Tarasov, Andrew Shevchuk

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

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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, non‐adherent, 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.

Original language	English
Number of pages	9
Journal	Journal of Microscopy
Early online date	22 Oct 2020
DOIs	https://doi.org/10.1111/jmi.12972
Publication status	Published online - 22 Oct 2020

Bibliographical note

Funding Information:
This work was supported by BBSRC funding to A.S. (BB/M022080/1). P.N. acknowledges support from the Russian Science Foundation (grant no. 19‐79‐30062). Y.K. acknowledges support from the World Premier International Research Center Initiative (WPI), MEXT, Japan.

Publisher Copyright:
© 2020 The Authors. Journal of Microscopy published by John Wiley & Sons Ltd on behalf of Royal Microscopical Society

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

Keywords

dense core vesicle
fusion pore
hormone
secretion

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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Insulin_release_by_SICM-FCM_v1.5wFigsAuthor Accepted Manuscript, 1.03 MBLicence: CC BY

Cite this

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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, non‐adherent, 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.",

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AU - Tarasov, Andrei

AU - Shevchuk, Andrew

N1 - Funding Information: This work was supported by BBSRC funding to A.S. (BB/M022080/1). P.N. acknowledges support from the Russian Science Foundation (grant no. 19‐79‐30062). Y.K. acknowledges support from the World Premier International Research Center Initiative (WPI), MEXT, Japan. Publisher Copyright: © 2020 The Authors. Journal of Microscopy published by John Wiley & Sons Ltd on behalf of Royal Microscopical Society Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

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Release of insulin granules by simultaneous, high-speed correlative SICM-FCM

Abstract

Bibliographical note

Keywords

UN SDGs

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