Abstract:
:In this study the time course of homing and the body distribution of systemically delivered bone marrow mesenchymal stem cells (BM-MSCs) after myocardial infarction (MI) were evaluated. BM-MSCs were isolated from Wistar rats, expanded in vitro, and their phenotypical characterization was performed by flow cytometer. Rats were randomly divided into three groups: control, sham MI, and MI. BM-MSCs (5 x 10(6)) were labeled with (99m)Tc-HMPAO and injected through the tail vein 7 days after MI. Gamma camera imaging was performed at 5, 15, 30, and 60 min after cell inoculation. Due to the (99m)Tc short half-life, cell migration and location were also evaluated in heart sections using DAPI-labeled cells 7 days after transplantation. Phenotypical characterization showed that BM-MSCs were CD90(+), CD73(+), CD54(+), and CD45(-). Five minutes after (99m)Tc-HMPAO-labeled cell injection, they were detected in various tissues. The cells migrated mainly to the lungs (approximately 70%) and, in small amounts, to the heart, kidneys, spleen, and bladder. The number of cells in the heart and lungs decreased after 60 min. MI markedly increased the amount of cells in the heart, but not in the lungs, during the period of observation (4.55 +/- 0.32 vs. 6.34 +/- 0.67% of uptake in infarcted hearts). No significant differences were observed between control and sham groups. Additionally, 7 days after DAPI-labeled cells injection, they were still detected in the heart but only in infarcted areas. These results suggest that the migration of systemically delivered BM-MSCs to the heart is time dependent and MI specifically increases BM-MSCs homing to injured hearts. However, the systemic delivery is limited by cell entrapment in the lungs.
journal_name
Cell Transplantjournal_title
Cell transplantationauthors
Assis AC,Carvalho JL,Jacoby BA,Ferreira RL,Castanheira P,Diniz SO,Cardoso VN,Goes AM,Ferreira AJdoi
10.3727/096368909X479677subject
Has Abstractpub_date
2010-01-01 00:00:00pages
219-30issue
2eissn
0963-6897issn
1555-3892pii
ct2046assisjournal_volume
19pub_type
杂志文章abstract::Human marrow stromal cells (hMSCs) provide functional benefit in rats subjected to stroke. Astrocytes are coupled into a cellular network via gap junction channels, predominantly composed of connexin-43 (Cx43) proteins. Astrocytes are believed to play a vital role in neuroprotection by providing energy substrates to n...
journal_title:Cell transplantation
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abstract::Functional demands on a bioartificial liver support (BAL) device are not limited to biosynthetic activities, but must also encompass metabolic removal of potentially toxic substances. For most BALs, however, the concept and design are exclusively directed to biosynthetic support. To add the ability to metabolize and r...
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abstract::Previous studies in humans with type 1 diabetes mellitus (T1D) and in nonobese diabetic mice have investigated the beneficial immunomodulatory potential of aerobic physical activity. Performing high volume of aerobic exercise may favorably regulate autoimmunity in diabetes. We tested whether increased physical activit...
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abstract::Clinically, many candidates for islet transplantation are already immunized, which increases their risk of graft rejection. Encapsulation of pancreatic islets using the TheraCyte™ device has been shown to protect against allograft rejection in nonimmunized recipients. However, the capacity of the TheraCyte™ device to ...
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journal_title:Cell transplantation
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pub_type: 杂志文章,评审
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journal_title:Cell transplantation
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abstract::The third-generation NOD/LtSz-scid/IL2Rγ(null) (NOD/SCID IL2Rγ(null)) mouse represents a significantly improved xenograft model allowing high levels of human leukocyte engraftment over extended follow up. One remaining limitation of this mouse model, however, is the low level of circulating human erythrocytes. We esta...
journal_title:Cell transplantation
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journal_title:Cell transplantation
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更新日期:2019-06-01 00:00:00
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journal_title:Cell transplantation
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abstract::Radiotherapy is an effective treatment for brain tumors but often results in cognitive deficits in survivors. Transplantation of embryonic or brain-derived neural stem/progenitor cells (BNSPCs) ameliorated cognitive impairment after irradiation (IR) in animal models. However, such an approach in patients requires a cl...
journal_title:Cell transplantation
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journal_title:Cell transplantation
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更新日期:2019-07-01 00:00:00
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journal_title:Cell transplantation
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journal_title:Cell transplantation
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journal_title:Cell transplantation
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journal_title:Cell transplantation
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doi:
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