SwePub
Sök i LIBRIS databas

  Utökad sökning

WFRF:(Idevall Hagren Olof 1980 )
 

Sökning: WFRF:(Idevall Hagren Olof 1980 ) > Indicator-dependent...

  • Yang, MingyuUppsala universitet,Institutionen för medicinsk cellbiologi (författare)

Indicator-dependent differences in detection of local intracellular Ca2+release events evoked by voltage-gated Ca2+entry in pancreatic & beta;-cells

  • Artikel/kapitelEngelska2023

Förlag, utgivningsår, omfång ...

  • Elsevier BV,2023
  • electronicrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:uu-509244
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-509244URI
  • https://doi.org/10.1016/j.cellsig.2023.110805DOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • Genetically encoded Ca2+ indicators have become widely used in cell signalling studies as they offer advantages over cell-loaded dye indicators in enabling specific cellular or subcellular targeting. Comparing responses from dye and protein-based indicators may provide information about indicator properties and cell physiology, but side-by-side recordings in cells are scarce. In this study, we compared cytoplasmic Ca2+ concentration ([Ca2+]i) changes in insulin-secreting & beta;-cells recorded with commonly used dyes and indicators based on circularly permuted fluorescent proteins. Total internal reflection fluorescence (TIRF) imaging of K+ depolarizationtriggered submembrane [Ca2+]i increases showed that the dyes Fluo-4 and Fluo-5F mainly reported stable [Ca2+]i elevations, whereas the proteins R-GECO1 and GCaMP5G more often reported distinct [Ca2+]i spikes from an elevated level. [Ca2+]i spiking occurred also in glucose-stimulated cells. The spikes reflected Ca2+ release from the endoplasmic reticulum, triggered by autocrine activation of purinergic receptors after exocytotic release of ATP and/or ADP, and the spikes were consequently prevented by SERCA inhibition or P2Y1-receptor antagonism. Widefield imaging, which monitors the entire cytoplasm, increased the spike detection by the Ca2+ dyes. The indicator-dependent response patterns were unrelated to Ca2+ binding affinity, buffering and mobility, and probably reflects the much slower dissociation kinetics of protein compared to dye indicators. Ca2+ dyes thus report signalling within the submembrane space excited by TIRF illumination, whereas the protein indicators also catch Ca2+ events originating outside this volume. The study highlights that voltage-dependent Ca2+ entry in & beta;-cells is tightly linked to local intracellular Ca2+ release mediated via an autocrine route that may be more important than previously reported direct Ca2+ effects on phospholipase C or on intracellular channels mediating calcium-induced calcium release.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Dyachok, Oleg,1965-Uppsala universitet,Institutionen för medicinsk cellbiologi(Swepub:uu)olegdyac (författare)
  • Xu, YunjianUppsala universitet,Institutionen för medicinsk cellbiologi(Swepub:uu)yunxu459 (författare)
  • Gylfe, Erik,1947-Uppsala universitet,Institutionen för medicinsk cellbiologi(Swepub:uu)erikgylf (författare)
  • Idevall Hagren, Olof,1980-Uppsala universitet,Institutionen för medicinsk cellbiologi(Swepub:uu)olide169 (författare)
  • Tengholm, Anders,1971-Uppsala universitet,Institutionen för medicinsk cellbiologi(Swepub:uu)andeteng (författare)
  • Uppsala universitetInstitutionen för medicinsk cellbiologi (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Cellular Signalling: Elsevier BV1090898-65681873-3913

Internetlänk

Hitta via bibliotek

Till lärosätets databas

Sök utanför SwePub

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy