Abstract:
BACKGROUND AIMS:Apoptosis of radiosensitive cells in the bone marrow and gut is a serious, at times life-threatening, complication arising from radiation exposure. METHODS:We investigated whether adoptive transfer of allogeneic bone marrow-derived mesenchymal stromal cells (MSC) could exert cytoprotective and life-sparing effects in a mouse model of sublethal total body irradiation (TBI). RESULTS:We demonstrated that a single intraperitoneal injection of C57Bl/6 MSC given to major histocompatibility complex (MHC)-mismatched Balb/c mice within 24 h of sublethal TBI significantly reduced mortality in a dose-dependent manner. Histologic analysis and Ki67 immunostaining of jejunum sections collected 3 and 6 days post-TBI indicated that MSC protected the gastrointestinal epithelium from TBI-induced damage and significantly accelerated recovery of the gut by stimulating proliferation of the crypt cell pool. Using interleukin-6(-/-) (IL-6) MSC, we demonstrated that IL-6 expressed by MSC played a role in gastrointestinal epithelium regeneration. CONCLUSIONS:Our results suggest that allogeneic MHC-mismatched MSC may be exploited to reduce gastrointestinal complications and mortality arising from ionizing radiation exposure.
journal_name
Cytotherapyjournal_title
Cytotherapyauthors
François M,Birman E,Forner KA,Gaboury L,Galipeau Jdoi
10.3109/14653249.2012.684378subject
Has Abstractpub_date
2012-11-01 00:00:00pages
1164-70issue
10eissn
1465-3249issn
1477-2566pii
S1465-3249(12)71235-5journal_volume
14pub_type
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