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Cited by 296

The DOI matches its Crossref record; 36 of the 36 references it cites were found in a registry or an index.

Amiloride-blockable acid-sensing ion channels are leading acid sensors expressed in human nociceptors

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Ugawa, Shinya, Ueda, Takashi, Ishida, Yusuke, Nishigaki, Makoto, Shibata, Yasuhiro, Shimada, Shoichi·2002·Journal of Clinical Investigation

Abstract

Many painful inflammatory and ischemic conditions such as rheumatoid arthritis, cardiac ischemia, and exhausted skeletal muscles are accompanied by local tissue acidosis. In such acidotic states, extracellular protons provoke the pain by opening cation channels in nociceptors. It is generally believed that a vanilloid receptor subtype-1 (VR1) and an acid-sensing ion channel (ASIC) mediate the greater part of acid-induced nociception in mammals. Here we provide evidence for the involvement of both channels in acid-evoked pain in humans and show their relative contributions to the nociception. In our psychophysical experiments, direct infusion of acidic solutions (pH > or = 6.0) into human skin caused localized pain, which was blocked by amiloride, an inhibitor of ASICs, but not by capsazepine, an inhibitor of VR1. Under more severe acidification (pH 5.0) amiloride was less effective in reducing acid-evoked pain. In addition, capsazepine had a partial blocking effect under these conditions. Amiloride itself neither blocked capsaicin-evoked localized pain in human skin nor inhibited proton-induced currents in VR1-expressing Xenopus oocytes. Our results suggest that ASICs are leading acid sensors in human nociceptors and that VR1 participates in the nociception mainly under extremely acidic conditions.

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Metadata

Authors
Ugawa, S., Ueda, T., Ishida, Y., Nishigaki, M., Shibata, Y., & Shimada, S.
Venue
Journal of Clinical Investigation
Published
2002-10-15
Volume
110
Issue
8
Pages
1185-1190
ISSN
0021-9738 (ISSN-L)
OpenAlex
W1963984202
Cited by
296
References
36
FWCI
4.30
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Amiloride-blockable acid-sensing ion channels are leading acid sensors expressed in human nociceptors. https://app.cochat.ai/papers/10.1172/jci15709
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Ugawa, S., Ueda, T., Ishida, Y., Nishigaki, M., Shibata, Y., & Shimada, S. (2002). Amiloride-blockable acid-sensing ion channels are leading acid sensors expressed in human nociceptors. Journal of Clinical Investigation. https://doi.org/10.1172/jci15709

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.