PMID- 29568282 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20201001 IS - 1664-2295 (Print) IS - 1664-2295 (Electronic) IS - 1664-2295 (Linking) VI - 9 DP - 2018 TI - Dose-Dependent Effect of Intravenous Administration of Human Umbilical Cord-Derived Mesenchymal Stem Cells in Neonatal Stroke Mice. PG - 133 LID - 10.3389/fneur.2018.00133 [doi] LID - 133 AB - Neonatal brain injury induced by stroke causes significant disability, including cerebral palsy, and there is no effective therapy for stroke. Recently, mesenchymal stem cells (MSCs) have emerged as a promising tool for stem cell-based therapies. In this study, we examined the safety and efficacy of intravenously administered human umbilical cord-derived MSCs (UC-MSCs) in neonatal stroke mice. Pups underwent permanent middle cerebral artery occlusion at postnatal day 12 (P12), and low-dose (1 x 10(4)) or high-dose (1 x 10(5)) UC-MSCs were administered intravenously 48 h after the insult (P14). To evaluate the effect of the UC-MSC treatment, neurological behavior and cerebral blood flow were measured, and neuroanatomical analysis was performed at P28. To investigate the mechanisms of intravenously injected UC-MSCs, systemic blood flowmetry, in vivo imaging and human brain-derived neurotrophic factor (BDNF) measurements were performed. Functional disability was significantly improved in the high-dose UC-MSC group when compared with the vehicle group, but cerebral blood flow and cerebral hemispheric volume were not restored by UC-MSC therapy. The level of exogenous human BDNF was elevated only in the cerebrospinal fluid of one pup 24 h after UC-MSC injection, and in vivo imaging revealed that most UC-MSCs were trapped in the lungs and disappeared in a week without migration toward the brain or other organs. We found that systemic blood flow was stable over the 10 min after cell administration and that there were no differences in mortality among the groups. Immunohistopathological assessment showed that the percent area of Iba1-positive staining in the peri-infarct cortex was significantly reduced with the high-dose UC-MSC treatment compared with the vehicle treatment. These results suggest that intravenous administration of UC-MSCs is safe for a mouse model of neonatal stroke and improves dysfunction after middle cerebral artery occlusion by modulating the microglial reaction in the peri-infarct cortex. FAU - Tanaka, Emi AU - Tanaka E AD - Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Suita, Japan. AD - Department of Pediatrics, Osaka City University Graduate School of Medicine, Osaka, Japan. FAU - Ogawa, Yuko AU - Ogawa Y AD - Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Suita, Japan. FAU - Mukai, Takeo AU - Mukai T AD - Department of Cell Processing and Transfusion, Institute of Medical Science, The University of Tokyo, Tokyo, Japan. FAU - Sato, Yoshiaki AU - Sato Y AD - Division of Neonatology, Center for Maternal-Neonatal Care, Nagoya University Hospital, Nagoya, Japan. FAU - Hamazaki, Takashi AU - Hamazaki T AD - Department of Pediatrics, Osaka City University Graduate School of Medicine, Osaka, Japan. FAU - Nagamura-Inoue, Tokiko AU - Nagamura-Inoue T AD - Department of Cell Processing and Transfusion, Institute of Medical Science, The University of Tokyo, Tokyo, Japan. FAU - Harada-Shiba, Mariko AU - Harada-Shiba M AD - Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Suita, Japan. FAU - Shintaku, Haruo AU - Shintaku H AD - Department of Pediatrics, Osaka City University Graduate School of Medicine, Osaka, Japan. FAU - Tsuji, Masahiro AU - Tsuji M AD - Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Suita, Japan. LA - eng PT - Journal Article DEP - 20180308 PL - Switzerland TA - Front Neurol JT - Frontiers in neurology JID - 101546899 PMC - PMC5852073 OTO - NOTNLM OT - intravenous administration OT - mesenchymal stem cell OT - neonatal brain injury OT - neonatal stroke OT - umbilical cord-derived mesenchymal stem cell EDAT- 2018/03/24 06:00 MHDA- 2018/03/24 06:01 PMCR- 2018/03/08 CRDT- 2018/03/24 06:00 PHST- 2017/12/28 00:00 [received] PHST- 2018/02/22 00:00 [accepted] PHST- 2018/03/24 06:00 [entrez] PHST- 2018/03/24 06:00 [pubmed] PHST- 2018/03/24 06:01 [medline] PHST- 2018/03/08 00:00 [pmc-release] AID - 10.3389/fneur.2018.00133 [doi] PST - epublish SO - Front Neurol. 2018 Mar 8;9:133. doi: 10.3389/fneur.2018.00133. eCollection 2018.