PMID- 32223956 OWN - NLM STAT- MEDLINE DCOM- 20201113 LR - 20201113 IS - 1532-3072 (Electronic) IS - 0040-8166 (Linking) VI - 63 DP - 2020 Apr TI - Nrf2 played an important role in radiation protection effect of low-level laser exposed on umbilical cord mesenchymal stem cell. PG - 101329 LID - S0040-8166(19)30367-2 [pii] LID - 10.1016/j.tice.2019.101329 [doi] AB - To investigate the protective function of low-level laser irradiation (LLLI) against ionizing irradiation and explore the molecular mechanism of photomodulation of Nrf2 protein, the impact of LLLI (635 nm, 5.7 J/cm(2)) before 2 Gy gamma ray radiation of radio-sensitive tissue hematopoietic stem cells was evaluated. As a result, reduced levels of reactive oxygen species and increased expression of antioxidant enzymes were detected. Moreover, increased expression of Nrf2 was observed after LLLI, whereas brusatol pretreatment before LLLI abolished this effect. In vivo, transplantation of human umbilical cord mesenchymal stem cells (hUC-MSCs) was employed for therapy of hematopoietic function in an acute radiation sickness (H-ARS) mouse model, which was induced by 6-Gy ionizing irradiation; different hUC-MSC pretreatments including LLLI and Nrf2 RNAi were accounted for during experimental grouping. LLLI treatment of cells significantly increased the erythrocyte count and number of myelopoiesis clones (P < 0.05), but such improvements were reduced by Nrf2 RNAi pretreatment compared with cells transplanted without intervention. Therefore, LLLI may improve the radiation protection effect through molecular mechanisms related to the Nrf2 antioxidant pathway. CI - Copyright (c) 2020 Elsevier Ltd. All rights reserved. FAU - Wang, Hong AU - Wang H AD - Geriatric Health Engineering Research Center, Institute of Biomedical Engineering, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin, 300192, China. FAU - Tu, Wen-Jun AU - Tu WJ AD - Institute of Radiation Medicine, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin, 300192, China. FAU - Xiao, Changyan AU - Xiao C AD - Institute of Radiation Medicine, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin, 300192, China. FAU - Dong, Ming-Xin AU - Dong MX AD - Institute of Radiation Medicine, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin, 300192, China. FAU - Ye, Yin-Tao AU - Ye YT AD - Cancer Institute & Hospital, Tianjin Medical University, Tianjin, 300060, China. FAU - Deng, Juan AU - Deng J AD - Geriatric Health Engineering Research Center, Institute of Biomedical Engineering, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin, 300192, China. FAU - Wang, Yan AU - Wang Y AD - Geriatric Health Engineering Research Center, Institute of Biomedical Engineering, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin, 300192, China. FAU - Sha, Hong AU - Sha H AD - Geriatric Health Engineering Research Center, Institute of Biomedical Engineering, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin, 300192, China. Electronic address: shahong2000@163.com. FAU - Liu, Qiang AU - Liu Q AD - Institute of Radiation Medicine, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin, 300192, China. Electronic address: liuqiang@irm-cams.ac.cn. LA - eng PT - Journal Article DEP - 20200102 PL - Scotland TA - Tissue Cell JT - Tissue & cell JID - 0214745 RN - 0 (Antioxidants) RN - 0 (NF-E2-Related Factor 2) RN - 0 (NFE2L2 protein, human) RN - 0 (Nfe2l2 protein, mouse) SB - IM MH - Animals MH - Antioxidants/metabolism MH - Cell Differentiation/radiation effects MH - Cell Line MH - Cell Proliferation/*radiation effects MH - Gene Expression Regulation/radiation effects MH - Humans MH - Lasers/adverse effects MH - Mesenchymal Stem Cell Transplantation MH - Mesenchymal Stem Cells/*radiation effects MH - Mice MH - NF-E2-Related Factor 2/*genetics MH - Radiation Protection MH - Umbilical Cord/radiation effects OTO - NOTNLM OT - LLLI OT - Nrf2 OT - Radiation protection EDAT- 2020/04/01 06:00 MHDA- 2020/11/18 06:00 CRDT- 2020/04/01 06:00 PHST- 2019/08/29 00:00 [received] PHST- 2019/12/31 00:00 [revised] PHST- 2019/12/31 00:00 [accepted] PHST- 2020/04/01 06:00 [entrez] PHST- 2020/04/01 06:00 [pubmed] PHST- 2020/11/18 06:00 [medline] AID - S0040-8166(19)30367-2 [pii] AID - 10.1016/j.tice.2019.101329 [doi] PST - ppublish SO - Tissue Cell. 2020 Apr;63:101329. doi: 10.1016/j.tice.2019.101329. Epub 2020 Jan 2.