{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,12]],"date-time":"2026-04-12T12:40:24Z","timestamp":1775997624189,"version":"3.50.1"},"reference-count":37,"publisher":"American Physiological Society","issue":"8","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Applied Physiology"],"published-print":{"date-parts":[[2012,4,15]]},"abstract":"<jats:p>ATP, acting through P2X<jats:sub>2<\/jats:sub>\/P2X<jats:sub>3<\/jats:sub>receptor-channel complexes, plays an important role in carotid body chemoexcitation in response to natural stimuli in the rat. Since the channels are permeable to calcium, P2X activation by ATP should induce changes in intracellular calcium ([Ca<jats:sup>2+<\/jats:sup>]<jats:sub>i<\/jats:sub>). Here, we describe a novel ex vivo approach using fluorescence [Ca<jats:sup>2+<\/jats:sup>]<jats:sub>i<\/jats:sub>imaging that allows screening of retrogradely labeled chemoafferent neurons in the petrosal ganglion of the rat. ATP-induced [Ca<jats:sup>2+<\/jats:sup>]<jats:sub>i<\/jats:sub>responses were characterized at postnatal days (P) 5\u20138 and P19\u201325. While all labeled cells showed a brisk increase in [Ca<jats:sup>2+<\/jats:sup>]<jats:sub>i<\/jats:sub>in response to depolarization by high KCl (60 mM), only a subpopulation exhibited [Ca<jats:sup>2+<\/jats:sup>]<jats:sub>i<\/jats:sub>responses to ATP. ATP (250\u20131,000 \u03bcM) elicited one of three temporal response patterns: fast (R1), slow (R2), and intermediate (R3). At P5\u20138, R2 predominated and its magnitude was attenuated 44% by the P2X<jats:sub>1<\/jats:sub>antagonist, NF449 (10 \u03bcM), and 95% by the P2X<jats:sub>1<\/jats:sub>\/P2X<jats:sub>3<\/jats:sub>\/P2X<jats:sub>2\/3<\/jats:sub>antagonist, TNP-ATP (10 \u03bcM). At P19\u201325, R1 and R3 predominated and their magnitudes were attenuated 15% by NF449, 66% by TNP-ATP, and 100% by suramin (100 \u03bcM), a nonspecific P2 purinergic receptor antagonist. P2X<jats:sub>1<\/jats:sub>and P2X<jats:sub>2<\/jats:sub>protein levels in the petrosal ganglion decreased with development, while P2X<jats:sub>3<\/jats:sub>protein levels did not change significantly. We conclude that the profile of ATP-induced P2X-mediated [Ca<jats:sup>2+<\/jats:sup>]<jats:sub>i<\/jats:sub>responses changes in the postnatal period, corresponding with changes in receptor isoform expression. We speculate that these changes may participate in the postnatal maturation of chemosensitivity.<\/jats:p>","DOI":"10.1152\/japplphysiol.00511.2011","type":"journal-article","created":{"date-parts":[[2012,1,13]],"date-time":"2012-01-13T05:35:58Z","timestamp":1326432958000},"page":"1393-1402","source":"Crossref","is-referenced-by-count":15,"title":["Effect of development on [Ca<sup>2+<\/sup>]<sub>i<\/sub>transients to ATP in petrosal ganglion neurons: a pharmacological approach using optical recording"],"prefix":"10.1152","volume":"112","author":[{"given":"Ana R.","family":"Nunes","sequence":"first","affiliation":[{"name":"Pediatrics, Johns Hopkins Medical Institutions, Baltimore, Maryland;"},{"name":"CEDOC, Pharmacology, Faculdade de Ci\u00eancias Medicas, Universidade Nova de Lisboa, Lisbon, Portugal;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Raul","family":"Chavez-Valdez","sequence":"additional","affiliation":[{"name":"Pediatrics, Johns Hopkins Medical Institutions, Baltimore, Maryland;"},{"name":"Pediatrics, Texas Tech University-Health Sciences Center, Odessa, Texas;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tarrah","family":"Ezell","sequence":"additional","affiliation":[{"name":"Pediatrics, Johns Hopkins Medical Institutions, Baltimore, Maryland;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"David F.","family":"Donnelly","sequence":"additional","affiliation":[{"name":"Pediatrics, University School of Medicine, New Haven, Connecticut; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Joel C.","family":"Glover","sequence":"additional","affiliation":[{"name":"Physiology, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Estelle B.","family":"Gauda","sequence":"additional","affiliation":[{"name":"Pediatrics, Johns Hopkins Medical Institutions, Baltimore, Maryland;"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"24","reference":[{"key":"B1","doi-asserted-by":"publisher","DOI":"10.1016\/j.brainres.2006.11.012"},{"key":"B2","doi-asserted-by":"publisher","DOI":"10.1016\/j.neuroscience.2007.03.034"},{"key":"B3","doi-asserted-by":"publisher","DOI":"10.1016\/0003-2697(76)90527-3"},{"key":"B4","doi-asserted-by":"publisher","DOI":"10.1016\/j.bbrc.2004.07.081"},{"key":"B5","doi-asserted-by":"publisher","DOI":"10.1074\/jbc.M109.057315"},{"key":"B6","doi-asserted-by":"publisher","DOI":"10.1113\/jphysiol.1994.sp020067"},{"key":"B7","doi-asserted-by":"publisher","DOI":"10.1007\/s00424-006-0078-1"},{"key":"B8","doi-asserted-by":"publisher","DOI":"10.1016\/0306-4522(92)90534-9"},{"key":"B9","first-page":"1","volume":"30","author":"Glover JC","year":"1995","journal-title":"Neurosci Protocols"},{"key":"B10","doi-asserted-by":"publisher","DOI":"10.1152\/physrev.1994.74.4.829"},{"key":"B11","doi-asserted-by":"crossref","first-page":"720","DOI":"10.1016\/S0026-895X(24)12533-3","volume":"56","author":"Haines WR","year":"1999","journal-title":"Mol Pharmacol"},{"key":"B12","doi-asserted-by":"publisher","DOI":"10.1523\/JNEUROSCI.06-04-00983.1986"},{"key":"B13","doi-asserted-by":"publisher","DOI":"10.1113\/jphysiol.1992.sp019239"},{"key":"B14","doi-asserted-by":"publisher","DOI":"10.1016\/S0006-8993(98)00486-7"},{"key":"B15","doi-asserted-by":"publisher","DOI":"10.1152\/ajplung.90383.2008"},{"key":"B16","doi-asserted-by":"publisher","DOI":"10.1016\/j.brainres.2006.07.084"},{"key":"B17","doi-asserted-by":"publisher","DOI":"10.1021\/ac7018969"},{"key":"B18","doi-asserted-by":"publisher","DOI":"10.1152\/japplphysiol.00871.2010"},{"key":"B19","doi-asserted-by":"publisher","DOI":"10.1152\/physrev.00015.2002"},{"key":"B20","doi-asserted-by":"publisher","DOI":"10.1016\/S0034-5687(99)00017-1"},{"key":"B21","doi-asserted-by":"publisher","DOI":"10.1038\/nn812"},{"key":"B22","doi-asserted-by":"publisher","DOI":"10.1113\/jphysiol.2001.012836"},{"key":"B23","doi-asserted-by":"crossref","first-page":"413","DOI":"10.1016\/S0031-6997(24)01373-5","volume":"50","author":"Ralevic V","year":"1998","journal-title":"Pharmacol Rev"},{"key":"B24","doi-asserted-by":"publisher","DOI":"10.1016\/j.resp.2006.07.006"},{"key":"B25","doi-asserted-by":"publisher","DOI":"10.1523\/JNEUROSCI.23-36-11315.2003"},{"key":"B26","doi-asserted-by":"publisher","DOI":"10.1007\/s002329900113"},{"key":"B27","doi-asserted-by":"publisher","DOI":"10.1016\/S0072-9752(07)01502-3"},{"key":"B28","doi-asserted-by":"publisher","DOI":"10.1152\/ajplung.1995.268.5.L801"},{"key":"B29","doi-asserted-by":"publisher","DOI":"10.1016\/S0165-1838(00)00123-5"},{"key":"B30","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMra021405"},{"key":"B31","doi-asserted-by":"publisher","DOI":"10.1016\/j.neulet.2005.04.041"},{"key":"B32","doi-asserted-by":"publisher","DOI":"10.1016\/S0006-8993(00)02817-1"},{"key":"B33","doi-asserted-by":"publisher","DOI":"10.1016\/S0006-8993(03)03366-3"},{"key":"B34","doi-asserted-by":"crossref","first-page":"969","DOI":"10.1016\/S0026-895X(24)13265-8","volume":"53","author":"Virginio C","year":"1998","journal-title":"Mol Pharmacol"},{"key":"B35","doi-asserted-by":"publisher","DOI":"10.1111\/j.1469-7793.1999.493ae.x"},{"key":"B36","doi-asserted-by":"publisher","DOI":"10.1016\/j.resp.2006.01.003"},{"key":"B37","doi-asserted-by":"publisher","DOI":"10.1111\/j.1469-7793.2000.t01-1-00143.x"}],"container-title":["Journal of Applied Physiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.physiology.org\/doi\/pdf\/10.1152\/japplphysiol.00511.2011","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,3,18]],"date-time":"2025-03-18T19:24:32Z","timestamp":1742325872000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.physiology.org\/doi\/10.1152\/japplphysiol.00511.2011"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,4,15]]},"references-count":37,"journal-issue":{"issue":"8","published-print":{"date-parts":[[2012,4,15]]}},"alternative-id":["10.1152\/japplphysiol.00511.2011"],"URL":"https:\/\/doi.org\/10.1152\/japplphysiol.00511.2011","relation":{},"ISSN":["8750-7587","1522-1601"],"issn-type":[{"value":"8750-7587","type":"print"},{"value":"1522-1601","type":"electronic"}],"subject":[],"published":{"date-parts":[[2012,4,15]]}}}