{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,3,7]],"date-time":"2025-03-07T05:08:01Z","timestamp":1741324081255,"version":"3.38.0"},"reference-count":38,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"2","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["Stroke"],"published-print":{"date-parts":[[2001,2]]},"abstract":"<jats:p><jats:italic>Background and Purpose<\/jats:italic>\u2014Extracellular ATP might induce cerebral vasospasm after subarachnoid hemorrhage through P<jats:sub>2<\/jats:sub>receptor. To investigate the roles of P<jats:sub>2<\/jats:sub>receptor subtypes in vasospasm, we examined the changes in mRNA expression of P<jats:sub>2<\/jats:sub>receptor subtypes in basilar arteries from double cisternal blood injection rat models.<\/jats:p><jats:p><jats:italic>Methods<\/jats:italic>\u2014One hundred male Sprague-Dawley rats, each weighing 350 to 400 g, were divided into 2 groups of 50. In the first group (n=50), the autologous arterial blood (0.2 to 0.3 mL) was injected into the cisterna magna on days 0 and 2. The rats were killed on day 3, 5, or 7 (n=10 in each group). In the sham group (n=10), the rats were injected with saline (0.3 mL) instead of blood. Ten rats were killed without blood or saline injection and served as control. The basilar arteries from rats in each group were used for reverse transcription and polymerase chain reaction. In another group of 50 rats, the same experiment was conducted, and the basilar arteries were collected for transmission electron microscopic study.<\/jats:p><jats:p><jats:italic>Results<\/jats:italic>\u2014In the subarachnoid hemorrhage groups, transmission electron microscopy showed the reduction in vessel perimeter on days 5 and 7 to be approximately 30% to 40%. The P<jats:sub>2X1<\/jats:sub>mRNA level was significantly decreased on day 3 and recovered on days 5 and 7. The P<jats:sub>2Y1<\/jats:sub>mRNA level was transiently increased on day 5, and the P<jats:sub>2Y2<\/jats:sub>mRNA level was elevated from day 5 to day 7 (<jats:italic>P<\/jats:italic>&lt;0.05).<\/jats:p><jats:p><jats:italic>Conclusions<\/jats:italic>\u2014The differential expression of the P<jats:sub>2<\/jats:sub>receptors indicates that P<jats:sub>2X1<\/jats:sub>subtype might not play an important role in vasospasm. The upregulation of P<jats:sub>2Y1<\/jats:sub>and P<jats:sub>2Y2<\/jats:sub>receptors might enable ATP to produce contraction at low levels of concentration.<\/jats:p>","DOI":"10.1161\/01.str.32.2.516","type":"journal-article","created":{"date-parts":[[2011,6,17]],"date-time":"2011-06-17T20:08:03Z","timestamp":1308341283000},"page":"516-522","update-policy":"https:\/\/doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":23,"title":["Altered Expression of P<sub>2<\/sub>Receptor mRNAs in the Basilar Artery in a Rat Double Hemorrhage Model"],"prefix":"10.1161","volume":"32","author":[{"given":"Robin C.","family":"Carpenter","sequence":"first","affiliation":[{"name":"From the Departments of Neurosurgery and Microbiology (E.B.), University of Mississippi Medical Center, Jackson."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Liyan","family":"Miao","sequence":"additional","affiliation":[{"name":"From the Departments of Neurosurgery and Microbiology (E.B.), University of Mississippi Medical Center, Jackson."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yasushi","family":"Miyagi","sequence":"additional","affiliation":[{"name":"From the Departments of Neurosurgery and Microbiology (E.B.), University of Mississippi Medical Center, Jackson."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eva","family":"Bengten","sequence":"additional","affiliation":[{"name":"From the Departments of Neurosurgery and Microbiology (E.B.), University of Mississippi Medical Center, Jackson."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"John H.","family":"Zhang","sequence":"additional","affiliation":[{"name":"From the Departments of Neurosurgery and Microbiology (E.B.), University of Mississippi Medical Center, Jackson."}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"276","reference":[{"key":"e_1_3_2_1_2","doi-asserted-by":"publisher","DOI":"10.1161\/str.16.4.3895589"},{"key":"e_1_3_2_2_2","first-page":"27","volume":"72","year":"1999","unstructured":"Weir B, Macdonald RL, Stoodley M. 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