ResearchInositol 1,4,5-trisphosphatem and ryanodinemsensitive Ca2+ release channel-dependent Ca2+ signalling in rat portal vein myocytes
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Presenilin 1 mutation decreases both calcium and contractile responses in cerebral arteries
2017, Neurobiology of AgingCitation Excerpt :Therefore, we studied whether the Ca2+ signals are altered in VSMC of PS1dE9 mice. Based on studies showing that RYRs control both InsP3- and Ca2+-induced Ca2+ signals in VSMCs (Boittin et al., 1998, 1999; Coussin et al., 2000) and that PS interact with RYRs to influence their activity (Hayrapetyan et al., 2008; Payne et al., 2013; Rybalchenko et al., 2008), we focused our investigations on the effect of the PS1dE9 mutation on the caffeine-activated RYR-mediated Ca2+ signals. The amplitude (peak) of caffeine-induced Ca2+ responses was not significantly different in NT and PS1dE9 vascular myocytes, either in the presence (mean ΔF/F0 = 4.26 in NT and 3.74 in PS1dE9, p = 0.3459) or in the absence of extracellular Ca2+ (mean ΔF/F0 = 2.53 in NT and 2.22 in PS1dE9, p = 0.1352; Fig. 3A).
Nanojunctions of the Sarcoplasmic Reticulum Deliver Site- and Function-Specific Calcium Signaling in Vascular Smooth Muscles
2017, Advances in PharmacologyCitation Excerpt :The aforementioned organizational structure is quite unlike that suggested by investigations on portal vein and mesenteric arterial smooth muscles, which appear to exhibit no such lines of segregation between IP3Rs and RyRs. This is evident from the fact that in both of these myocyte types spontaneous Ca2 + release events are supported by IP3Rs and RyRs (Gordienko & Bolton, 2002; Pucovsky & Bolton, 2006), and in portal vein myocytes CICR via RyRs is triggered by IP3-induced Ca2 + release from IP3Rs (Boittin, Coussin, Macrez, Mironneau, & Mironneau, 1998). Intriguingly, however, in these cell types multiple, perinuclear Ca2 + discharge regions (CDRs) have been identified, to which both IP3Rs and RyRs appear to be targeted (Pucovsky & Bolton, 2006).
Ca<sup>2+</sup> microdomains in smooth muscle
2006, Cell CalciumMechanisms underlying the inhibitory effects induced by pituitary adenylate cyclase-activating peptide in mouse ileum
2005, European Journal of PharmacologyPyridine nucleotides and calcium signalling in arterial smooth muscle: From cell physiology to pharmacology
2005, Pharmacology and TherapeuticsCitation Excerpt :Support for this viewpoint may be derived from the finding that Ca2+ mobilisation by IP3Rs in venous (Boittin et al., 1998) and tracheal (Prakash et al., 1998) smooth muscle may, in turn, trigger CICR via RyRs, whilst in pulmonary arterial smooth muscle cells IP3 can initiate a global Ca2+ wave after block of RyRs by ryanodine (Boittin et al., 2002).