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However, the mechanisms through which mechanosensitive cells in the oral cavity transmit mechanical information from the periphery to the brain are not well defined. We hypothesized Merkel cells, which are epithelial mechanoreceptors and important for pressure and texture sensing in the skin, can be mechanically activated in the oral cavity. Using live\u2010cell calcium imaging, we recorded Merkel cell activity in ex vivo gingival and palatal preparations from mice in response to mechanical stimulation. Merkel cells responded with distinct temporal patterns and activation thresholds in a region\u2010specific manner, with Merkel cells in the hard palate having a higher mean activation threshold than those in the gingiva. Unexpectedly, we found that oral keratinocytes were also activated by mechanical stimulation, even in the absence of Merkel cells. This indicates that mechanical stimulation of oral mucosa independently activates at least two subpopulations of epithelial cells. Finally, we found that oral Merkel cells contribute to preference for consuming oily emulsion. To our knowledge, these data represent the first functional study of Merkel\u2010cell physiology and its role in flavor detection in the oral cavity.<\/jats:p>","DOI":"10.14814\/phy2.15826","type":"journal-article","created":{"date-parts":[[2024,1,22]],"date-time":"2024-01-22T03:36:19Z","timestamp":1705894579000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Merkel cells and keratinocytes in oral mucosa are activated by mechanical stimulation"],"prefix":"10.14814","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0188-7638","authenticated-orcid":false,"given":"Chi\u2010Kun","family":"Tong","sequence":"first","affiliation":[{"name":"Department of Physiology and Cellular Biophysics Columbia University Medical Center  New York New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0600-1253","authenticated-orcid":false,"given":"Yalda","family":"Moayedi","sequence":"additional","affiliation":[{"name":"Department of Physiology and Cellular Biophysics Columbia University Medical Center  New York New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1166-3374","authenticated-orcid":false,"given":"Ellen A.","family":"Lumpkin","sequence":"additional","affiliation":[{"name":"Department of Physiology and Cellular Biophysics Columbia University Medical Center  New York New York USA"},{"name":"Department of Dermatology Columbia University Medical Center  New York New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2024,1,21]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1530\/JOE-13-0553"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.7554\/eLife.09674"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1042\/bj3560345"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.3389\/fnmol.2014.00097"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1038\/nature12354"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41467-021-26687-w"},{"key":"e_1_2_10_8_1","first-page":"E516","article-title":"Biphasic functions for the GDNF\u2010Ret signaling pathway in chemosensory neuron development and diversification","volume":"115","author":"Donnelly C. 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