{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,10]],"date-time":"2026-10-10T14:57:31Z","timestamp":1791644251365,"version":"4.3.4"},"reference-count":48,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JNS"],"published-print":{"date-parts":[[2009,6]]},"abstract":"\n Object<\/jats:title>\n Cell therapy has shown preclinical promise in the treatment of many diseases, and its application is being translated to the clinical arena. Intravenous mesenchymal stem cell (MSC) therapy has been shown to improve functional recovery after traumatic brain injury (TBI). Herein, the authors report on their attempts to reproduce such observations, including detailed characterizations of the MSC population, non\u2013bromodeoxyuridine-based cell labeling, macroscopic and microscopic cell tracking, quantification of cells traversing the pulmonary microvasculature, and well-validated measurement of motor and cognitive function recovery.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n Rat MSCs were isolated, expanded in vitro, immunophenotyped, and labeled. Four million MSCs were intravenously infused into Sprague-Dawley rats 24 hours after receiving a moderate, unilateral controlled cortical impact TBI. Infrared macroscopic cell tracking was used to identify cell distribution. Immunohistochemical analysis of brain and lung tissues 48 hours and 2 weeks postinfusion revealed transplanted cells in these locations, and these cells were quantified. Intraarterial blood sampling and flow cytometry were used to quantify the number of transplanted cells reaching the arterial circulation. Motor and cognitive behavioral testing was performed to evaluate functional recovery.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n At 48 hours post\u2013MSC infusion, the majority of cells were localized to the lungs. Between 1.5 and 3.7% of the infused cells were estimated to traverse the lungs and reach the arterial circulation, 0.295% reached the carotid artery, and a very small percentage reached the cerebral parenchyma (0.0005%) and remained there. Almost no cells were identified in the brain tissue at 2 weeks postinfusion. No motor or cognitive functional improvements in recovery were identified.<\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n The intravenous infusion of MSCs appeared neither to result in significant acute or prolonged cerebral engraftment of cells nor to modify the recovery of motor or cognitive function. Less than 4% of the infused cells were likely to traverse the pulmonary microvasculature and reach the arterial circulation, a phenomenon termed the \u201cpulmonary first-pass effect,\u201d which may limit the efficacy of this therapeutic approach. The data in this study contradict the findings of previous reports and highlight the potential shortcomings of acute, single-dose, intravenous MSC therapy for TBI.<\/jats:p>\n <\/jats:sec>","DOI":"10.3171\/2008.9.jns08158","type":"journal-article","created":{"date-parts":[[2009,3,20]],"date-time":"2009-03-20T09:55:38Z","timestamp":1237542938000},"page":"1189-1197","source":"Crossref","is-referenced-by-count":229,"title":["Intravenous mesenchymal stem cell therapy for traumatic brain injury"],"prefix":"10.3171","volume":"110","author":[{"given":"Matthew T.","family":"Harting","sequence":"first","affiliation":[{"name":"Departments of Pediatric Surgery and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fernando","family":"Jimenez","sequence":"additional","affiliation":[{"name":"Departments of Pediatric Surgery and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hasan","family":"Xue","sequence":"additional","affiliation":[{"name":"Departments of Pediatric Surgery and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Uwe M.","family":"Fischer","sequence":"additional","affiliation":[{"name":"Departments of Pediatric Surgery and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"James","family":"Baumgartner","sequence":"additional","affiliation":[{"name":"Departments of Pediatric Surgery and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pramod K.","family":"Dash","sequence":"additional","affiliation":[{"name":"Neurobiology and Anatomy; and"},{"name":"The Vivian L. 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