In vivo stimulus-induced vasodilation occurs without IP3 receptor activation and may precede astrocytic calcium increase
- PMID: 23658179
- PMCID: PMC3712855
- DOI: 10.1523/JNEUROSCI.3285-12.2013
In vivo stimulus-induced vasodilation occurs without IP3 receptor activation and may precede astrocytic calcium increase
Abstract
Calcium-dependent release of vasoactive gliotransmitters is widely assumed to trigger vasodilation associated with rapid increases in neuronal activity. Inconsistent with this hypothesis, intact stimulus-induced vasodilation was observed in inositol 1,4,5-triphosphate (IP3) type-2 receptor (R2) knock-out (KO) mice, in which the primary mechanism of astrocytic calcium increase-the release of calcium from intracellular stores following activation of an IP3-dependent pathway-is lacking. Further, our results in wild-type (WT) mice indicate that in vivo onset of astrocytic calcium increase in response to sensory stimulus could be considerably delayed relative to the simultaneously measured onset of arteriolar dilation. Delayed calcium increases in WT mice were observed in both astrocytic cell bodies and perivascular endfeet. Thus, astrocytes may not play a role in the initiation of blood flow response, at least not via calcium-dependent mechanisms. Moreover, an increase in astrocytic intracellular calcium was not required for normal vasodilation in the IP3R2-KO animals.
Figures
Similar articles
-
Astrocytic Ca2+ signaling mediated by the endoplasmic reticulum in health and disease.J Pharmacol Sci. 2020 Oct;144(2):83-88. doi: 10.1016/j.jphs.2020.07.006. Epub 2020 Jul 18. J Pharmacol Sci. 2020. PMID: 32709559 Review.
-
Visualization of astrocytic intracellular Ca2+ mobilization.J Physiol. 2020 May;598(9):1671-1681. doi: 10.1113/JP277609. Epub 2019 Mar 18. J Physiol. 2020. PMID: 30825213 Review.
-
Disruption of IP₃R2-mediated Ca²⁺ signaling pathway in astrocytes ameliorates neuronal death and brain damage while reducing behavioral deficits after focal ischemic stroke.Cell Calcium. 2015 Dec;58(6):565-76. doi: 10.1016/j.ceca.2015.09.004. Epub 2015 Sep 25. Cell Calcium. 2015. PMID: 26433454 Free PMC article.
-
Loss of IP3 receptor-dependent Ca2+ increases in hippocampal astrocytes does not affect baseline CA1 pyramidal neuron synaptic activity.J Neurosci. 2008 May 7;28(19):4967-73. doi: 10.1523/JNEUROSCI.5572-07.2008. J Neurosci. 2008. PMID: 18463250 Free PMC article.
-
Dynamic inositol trisphosphate-mediated calcium signals within astrocytic endfeet underlie vasodilation of cerebral arterioles.J Gen Physiol. 2006 Dec;128(6):659-69. doi: 10.1085/jgp.200609650. J Gen Physiol. 2006. PMID: 17130519 Free PMC article.
Cited by
-
The role of neurovascular coupling dysfunction in cognitive decline of diabetes patients.Front Neurosci. 2024 Mar 21;18:1375908. doi: 10.3389/fnins.2024.1375908. eCollection 2024. Front Neurosci. 2024. PMID: 38576869 Free PMC article. Review.
-
Neurovascular coupling impairment as a mechanism for cognitive deficits in COVID-19.Brain Commun. 2024 Mar 7;6(2):fcae080. doi: 10.1093/braincomms/fcae080. eCollection 2024. Brain Commun. 2024. PMID: 38495306 Free PMC article. Review.
-
Modulatory effects of noradrenergic and serotonergic signaling pathway on neurovascular coupling.Commun Biol. 2024 Mar 8;7(1):287. doi: 10.1038/s42003-024-05996-y. Commun Biol. 2024. PMID: 38459113 Free PMC article.
-
Astrocytic GPCR-Induced Ca2+ Signaling Is Not Causally Related to Local Cerebral Blood Flow Changes.Int J Mol Sci. 2023 Sep 2;24(17):13590. doi: 10.3390/ijms241713590. Int J Mol Sci. 2023. PMID: 37686396 Free PMC article.
-
Modeling the relationship between neuronal activity and the BOLD signal: contributions from astrocyte calcium dynamics.Sci Rep. 2023 Apr 20;13(1):6451. doi: 10.1038/s41598-023-32618-0. Sci Rep. 2023. PMID: 37081004 Free PMC article.
References
Publication types
MeSH terms
Substances
Grants and funding
- R01 NS051188/NS/NINDS NIH HHS/United States
- EB009118/EB/NIBIB NIH HHS/United States
- P01 HL080101/HL/NHLBI NIH HHS/United States
- R01 NS054736/NS/NINDS NIH HHS/United States
- S10 RR029050/RR/NCRR NIH HHS/United States
- R01 NS057198/NS/NINDS NIH HHS/United States
- EB00790/EB/NIBIB NIH HHS/United States
- NS055104/NS/NINDS NIH HHS/United States
- P01 NS055104/NS/NINDS NIH HHS/United States
- R21 EB009118/EB/NIBIB NIH HHS/United States
- NS051188/NS/NINDS NIH HHS/United States
- T32 GM007198/GM/NIGMS NIH HHS/United States
- R01 NS057476/NS/NINDS NIH HHS/United States
- R01 EB000790/EB/NIBIB NIH HHS/United States
- NS057476/NS/NINDS NIH HHS/United States
- NS054736/NS/NINDS NIH HHS/United States
- NS057198/NS/NINDS NIH HHS/United States
LinkOut - more resources
Full Text Sources
Other Literature Sources
Molecular Biology Databases
Research Materials