Imperial College London
Alternate

Walter Distaso

Business School

Professor of Financial Econometrics
 
 
 
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Contact

 

+44 (0)20 7594 3293w.distaso Website

 
 
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Location

 

3.0253 Prince's GateSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Salem:2019:10.1038/s42255-019-0075-2,
author = {Salem, V and Delgadillo, Silva L and Suba, K and Mousavy, Gharavy SN and Akhtar, N and Martin-Alonso, A and Gaboriau, DCA and Rothery, SM and Styliandes, T and Carrat, G and Pullen, TJ and Pal, Singh S and Hodson, DJ and Leclerc, I and Shapiro, AMJ and Marchetti, P and Briant, LB and Distaso, W and Ninov, N and Rutter, G and Georgiadou, E},
doi = {10.1038/s42255-019-0075-2},
journal = {Nature Metabolism},
pages = {615--629},
title = {Leader β-cells coordinate Ca2+ dynamics across pancreatic islets in vivo},
url = {http://dx.doi.org/10.1038/s42255-019-0075-2},
volume = {1},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Pancreatic β-cells form highly connected networks within isolated islets. Whether this behaviour pertains to the situation in vivo, after innervation and during continuous perfusion with blood, is unclear. In the present study, we used the recombinant Ca2+ sensor GCaMP6 to assess glucose-regulated connectivity in living zebrafish Danio rerio, and in murine or human islets transplanted into the anterior eye chamber. In each setting, Ca2+ waves emanated from temporally defined leader β-cells, and three-dimensional connectivity across the islet increased with glucose stimulation. Photoablation of zebrafish leader cells disrupted pan-islet signalling, identifying these as likely pacemakers. Correspondingly, in engrafted mouse islets, connectivity was sustained during prolonged glucose exposure, and super-connected ‘hub’ cells were identified. Granger causality analysis revealed a controlling role for temporally defined leaders, and transcriptomic analyses revealed a discrete hub cell fingerprint. We thus define a population of regulatory β-cells within coordinated islet networks in vivo. This population may drive Ca2+ dynamics and pulsatile insulin secretion.
AU  - Salem,V
AU  - Delgadillo,Silva L
AU  - Suba,K
AU  - Mousavy,Gharavy SN
AU  - Akhtar,N
AU  - Martin-Alonso,A
AU  - Gaboriau,DCA
AU  - Rothery,SM
AU  - Styliandes,T
AU  - Carrat,G
AU  - Pullen,TJ
AU  - Pal,Singh S
AU  - Hodson,DJ
AU  - Leclerc,I
AU  - Shapiro,AMJ
AU  - Marchetti,P
AU  - Briant,LB
AU  - Distaso,W
AU  - Ninov,N
AU  - Rutter,G
AU  - Georgiadou,E
DO  - 10.1038/s42255-019-0075-2
EP  - 629
PY  - 2019///
SN  - 2522-5812
SP  - 615
TI  - Leader β-cells coordinate Ca2+ dynamics across pancreatic islets in vivo
T2  - Nature Metabolism
UR  - http://dx.doi.org/10.1038/s42255-019-0075-2
UR  - https://www.nature.com/articles/s42255-019-0075-2
UR  - http://hdl.handle.net/10044/1/71093
VL  - 1
ER  -
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