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  • Ramiro Diaz posted an update 2 weeks, 1 day ago

    And atherosclerosis (Doherty et al. 1994; Shi et al. 1996; Yang et al. 2000; Melendez and Tay 2008; Nunes and XE 991 Data Sheet Demaurex 2010; Moore and Tabas 2011; Rahaman et al. 2011a; Blakney et al. 2012; Kothapalli et al. 2012; Pi et al. 2014; Hind et al. 2015; Meng et al. 2015; Previtera and Sengupta 2015; Schmitt et al. 2015; Adlerz et al. 2016; Hansen and Taylor 2016; Houcken et al. 2016; Palombo and Kozakova 2016; Scheraga et al. 2016; Tedla et al. 2017). Because TRPV4 channels are sensitized by alterations in biomechanical stimuli (Liedtke and Friedman 2003; Liedtke et al. 2003; Liedtke 2008; Adapala et al. 2013; Goswami et al. 2017; Sharma et al. 2017), we tested the hypothesis that TRPV4 modulates PgLPS-induced proatherogenic macrophage functions in response toincreased matrix stiffness. We found that accumulation of TRPV4 in plasma membrane in PgLPS-stimulated macrophages was enriched by increases in matrix stiffness. Furthermore, we showed that PgLPS-triggered enhancement of oxLDL-induced foam cell generation was sensitive to changes in matrix stiffness. Altogether, these results recommend a doable mechanism by which function of TRPV4 proteins is usually upregulated in the course of PgLPS-induced proatherogenic responses. Previously published reports have identified members with the TRP channel superfamily for instance TRPC3 in macrophage survival, and have implicated TRPC3, TRPV2, and TRPM2 in macrophage phagocytosis, which might be of relevance to atherogenesis. Our results necessitate further research to examine the function of TRPV4 on diverse functions of macrophages including2019 | Vol. 7 | Iss. 7 | e14069 Page2019 The Authors. Physiological Reports published by Wiley Periodicals, Inc. on behalf with the Physiological Society along with the American Physiological Society.N. Gupta et al.TRPV4 Regulates Foam Cell Formationmigration, adhesion, apoptosis, and survival throughout atherogenesis. Efforts have already been made to elucidate the mechanisms underlying foam cell formation using the target of preventing atherosclerosis. Here, we identified a novel role of TRPV4 channels in PgLPS-triggered exacerbation of macrophage foam cell formation, indicating an association of TRPV4 in proatherogenic processes in macrophages. Our existing data seem to possess identified a specific plasma membrane receptor/channel, TRPV4, as a possible mediator of inflammatory/proatherogenic responses connected with pathogenesis of periodontitis-induced atherosclerosis. Previous reports from our laboratory and other individuals have shown a link among CD36-mediated uptake of oxLDL and macrophage foam cell formation (Rahaman et al. 2006, 2011b; Moore and Tabas 2011; Moore et al. 2013). Considering the fact that CD36 may be the important scavenger receptor for oxLDL-induced macrophage foam cell formation, we examined expression levels of CD36 in WT and TRPV4 KO cells. We found similar expression levels of CD36 protein in both WT and TRPV4 KO cells stimulated by PgLPS, suggesting that reduced foam cell formation within the absence of TRPV4 is not as a result of lack of CD36 expression. Therefore, we postulate that augmented colocalization of TRPV4 and CD36 in response to growing matrix stiffness in PgLPS-treated macrophages may possibly be linked to enhanced foam cell formation. A precise understanding from the mechanisms coupling periodontitis and atherosclerosis will likely be crucial to supply a rationale for long-term longitudinal human studies expected to assess causality, and to create novel therapeutic interventions.AcknowledgmentsWe thank S. Sharma for editing the prelimina.

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