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Ionizing irradiation induces acute haematopoietic syndrome and gastrointestinal syndrome independently in mice.


ABSTRACT: The role of bone marrow (BM) and BM-derived cells in radiation-induced acute gastrointestinal (GI) syndrome is controversial. Here we use bone marrow transplantation (BMT), total body irradiation (TBI) and abdominal irradiation (ABI) models to demonstrate a very limited, if any, role of BM-derived cells in acute GI injury and recovery. Compared with WT BM recipients, mice receiving BM from radiation-resistant PUMA KO mice show no protection from crypt and villus injury or recovery after 15 or 12?Gy TBI, but have a significant survival benefit at 12?Gy TBI. PUMA KO BM significantly protects donor-derived pan-intestinal haematopoietic (CD45+) and endothelial (CD105+) cells after IR. We further show that PUMA KO BM fails to enhance animal survival or crypt regeneration in radiosensitive p21 KO-recipient mice. These findings clearly separate the effects of radiation on the intestinal epithelium from those on the BM and endothelial cells in dose-dependent acute radiation toxicity.

SUBMITTER: Leibowitz BJ 

PROVIDER: S-EPMC4327858 | biostudies-literature | 2014 Mar

REPOSITORIES: biostudies-literature

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Ionizing irradiation induces acute haematopoietic syndrome and gastrointestinal syndrome independently in mice.

Leibowitz Brian J BJ   Wei Liang L   Zhang Lin L   Ping Xiaochun X   Epperly Michael M   Greenberger Joel J   Cheng Tao T   Yu Jian J  

Nature communications 20140318


The role of bone marrow (BM) and BM-derived cells in radiation-induced acute gastrointestinal (GI) syndrome is controversial. Here we use bone marrow transplantation (BMT), total body irradiation (TBI) and abdominal irradiation (ABI) models to demonstrate a very limited, if any, role of BM-derived cells in acute GI injury and recovery. Compared with WT BM recipients, mice receiving BM from radiation-resistant PUMA KO mice show no protection from crypt and villus injury or recovery after 15 or 12  ...[more]

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