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- W3111716646 abstract "Purpose This study aims to explore the radioprotective effects of recombinant human erythropoietin (rhEPO) on rats' submandibular gland hypofunction induced by irradiation (IR). Materials and Methods Thirty rats were divided into 3 groups: 1) control group, 2) IR group, and 3) IR + rhEPO group. The IR group and IR + rhEPO group received a single dose of 15 Grays (Gy) (0.98 Gy/min), plus, the IR + rhEPO group also received subcutaneous administration of rhEPO at a dose of 3,000 IU/kg body weight 3 days before irradiation and then repeated every 24 hours for the first 2 weeks after irradiation. Immunohistochemistry analysis to erythropoietin receptor was performed to detect the levels of erythropoietin receptor in submandibular glands with or without radiation. Ninety days after irradiation, the salivary flow rates were assessed, and the submandibular gland of every rat was subjected to hematoxylin and eosin staining and immunohistochemical staining with antiaquaporin 5 and anti–proliferating cell nuclear antigen antibodies. Apoptosis was examined by the terminal deoxynucleotidyl transferase biotin-dUDP nick end-labeling assay. In addition, to examine the protective role of rhEPO on human submandibular gland cells, the apoptotic and proliferation rate of cells under a radiation dose of 8 Gy was detected. One-way analysis of variance was carried out to analyze the results of each group, and the P value was set at 0.05. Results Erythropoietin receptor was expressed in the submandibular glands at a low level under normal conditions but upregulated after irradiation. rhEPO administration remarkably alleviated gland atrophy, increased salivary flow rates with upregulation of aquaporin-5 compared with the IR group. In addition, fewer apoptotic cells and more proliferative cells were observed in the IR + rhEPO group compared with the IR group, both in vivo and in vitro. Conclusions rhEPO administration may be a useful countermeasure to mitigate submandibular gland hypofunction after therapeutic radiation exposure. This study aims to explore the radioprotective effects of recombinant human erythropoietin (rhEPO) on rats' submandibular gland hypofunction induced by irradiation (IR). Thirty rats were divided into 3 groups: 1) control group, 2) IR group, and 3) IR + rhEPO group. The IR group and IR + rhEPO group received a single dose of 15 Grays (Gy) (0.98 Gy/min), plus, the IR + rhEPO group also received subcutaneous administration of rhEPO at a dose of 3,000 IU/kg body weight 3 days before irradiation and then repeated every 24 hours for the first 2 weeks after irradiation. Immunohistochemistry analysis to erythropoietin receptor was performed to detect the levels of erythropoietin receptor in submandibular glands with or without radiation. Ninety days after irradiation, the salivary flow rates were assessed, and the submandibular gland of every rat was subjected to hematoxylin and eosin staining and immunohistochemical staining with antiaquaporin 5 and anti–proliferating cell nuclear antigen antibodies. Apoptosis was examined by the terminal deoxynucleotidyl transferase biotin-dUDP nick end-labeling assay. In addition, to examine the protective role of rhEPO on human submandibular gland cells, the apoptotic and proliferation rate of cells under a radiation dose of 8 Gy was detected. One-way analysis of variance was carried out to analyze the results of each group, and the P value was set at 0.05. Erythropoietin receptor was expressed in the submandibular glands at a low level under normal conditions but upregulated after irradiation. rhEPO administration remarkably alleviated gland atrophy, increased salivary flow rates with upregulation of aquaporin-5 compared with the IR group. In addition, fewer apoptotic cells and more proliferative cells were observed in the IR + rhEPO group compared with the IR group, both in vivo and in vitro. rhEPO administration may be a useful countermeasure to mitigate submandibular gland hypofunction after therapeutic radiation exposure." @default.
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- W3111716646 date "2021-06-01" @default.
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- W3111716646 title "Erythropoietin Plays a Protective Role in Submandibular Gland Hypofunction Induced by Irradiation" @default.
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- W3111716646 doi "https://doi.org/10.1016/j.joms.2020.12.001" @default.
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