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• W2033620602 abstract "TRP vanilloid 2 (TRPV2) is a nonselective cation channel expressed prominently in medium- to large-diameter sensory neurons that can be activated by extreme heat (>52°C). These features suggest that TRPV2 might be a transducer of noxious heat in vivo. TRPV2 can also be activated by hypoosmolarity or cell stretch, suggesting potential roles in mechanotransduction. To address the physiological functions of TRPV2 in somatosensation, we generated TRPV2 knock-out mice and examined their behavioral and electrophysiological responses to heat and mechanical stimuli. TRPV2 knock-out mice showed reduced embryonic weight and perinatal viability. As adults, surviving knock-out mice also exhibited a slightly reduced body weight. TRPV2 knock-out mice showed normal behavioral responses to noxious heat over a broad range of temperatures and normal responses to punctate mechanical stimuli, both in the basal state and under hyperalgesic conditions such as peripheral inflammation and L5 spinal nerve ligation. Moreover, behavioral assays of TRPV1/TRPV2 double knock-out mice or of TRPV2 knock-out mice treated with resiniferatoxin to desensitize TRPV1-expressing afferents revealed no thermosensory consequences of TRPV2 absence. In line with behavioral findings, electrophysiological recordings from skin afferents showed that C-fiber responses to heat and C- and Aδ-fiber responses to noxious mechanical stimuli were unimpaired in the absence of TRPV2. The prevalence of thermosensitive Aδ-fibers was too low to permit comparison between genotypes. Thus, TRPV2 is important for perinatal viability but is not essential for heat or mechanical nociception or hypersensitivity in the adult mouse." @default.
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• W2033620602 date "2011-08-10" @default.
• W2033620602 modified "2023-10-16" @default.
• W2033620602 title "TRP Vanilloid 2 Knock-Out Mice Are Susceptible to Perinatal Lethality But Display Normal Thermal and Mechanical Nociception" @default.
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• W2033620602 doi "https://doi.org/10.1523/jneurosci.1384-09.2011" @default.
• W2033620602 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3192449" @default.
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