title: Activation of Nrf2-ARE signaling mitigates cyclophosphamide-induced myelosuppression.
abstract: Myelosuppression is the most common dose-limiting adverse effect of chemotherapies. In the present study, we investigated the involvement of nuclear erythroid 2-related factor 2 (Nrf2) in cyclophosphamide-induced myelosuppression in mice, and evaluated the potential of activating Nrf2 signaling as a preventive strategy. The whole blood from Nrf2-/-mice exhibited decreased antioxidant capacities, while the bone marrow cells, peripheral blood mononuclear cells and granulocytes from Nrf2-/-mice were more susceptible to acrolein-induced cytotoxicity than those from wild type mice. Single dosage of cyclophosphamide induced significantly severer acute myelosuppression in Nrf2-/-mice than in wild type mice. Furthermore, Nrf2-/-mice exhibited greater loss of peripheral blood nucleated cells and recovered slower from myelosuppression nadir upon multiple consecutive dosages of cyclophosphamide than wild type mice did. This was accompanied with decreased antioxidant and detoxifying gene expressions and impaired colony formation ability of Nrf2-/-bone marrow cells. More importantly, activation of Nrf2 signaling by CDDO-Me significantly alleviated cyclophosphamide-induced myelosuppression, while this alleviation was diminished in Nrf2-/-mice. In conclusion, the present study shows that Nrf2 plays a protective role in cyclophosphamide-induced myelosuppression and activation of Nrf2 is a promising strategy to prevent or treat chemotherapy-induced myelosuppression.
authors.affiliation: Department of Chemical Biology, Peking University School of Pharmaceutical Sciences, Beijing 100191, China.
authors.forename: Linling
authors.initials: L
authors.lastname: Que
authors.affiliation: Department of Chemical Biology, Peking University School of Pharmaceutical Sciences, Beijing 100191, China.
authors.forename: Liu
authors.initials: L
authors.lastname: He
authors.affiliation: Department of Chemical Biology, Peking University School of Pharmaceutical Sciences, Beijing 100191, China.
authors.forename: Chenshu
authors.initials: C
authors.lastname: Yu
authors.affiliation: Department of Oncology, Cancer Center, Peking University Third Hospital, Beijing 100191, China.
authors.forename: Wencheng
authors.initials: W
authors.lastname: Yin
authors.affiliation: Department of Oncology, Cancer Center, Peking University Third Hospital, Beijing 100191, China.
authors.forename: Liwen
authors.initials: L
authors.lastname: Ma
authors.affiliation: Department of Oncology, Cancer Center, Peking University Third Hospital, Beijing 100191, China. Electronic address: caobaoshan0711@aliyun.com.
authors.forename: Baoshan
authors.initials: B
authors.lastname: Cao
authors.affiliation: Department of Chemical Biology, Peking University School of Pharmaceutical Sciences, Beijing 100191, China. Electronic address: swang_yu@bjmu.edu.cn.
authors.forename: Siwang
authors.initials: S
authors.lastname: Yu
mesh_terms: D000818:Animals; D018906:Antineoplastic Agents, Alkylating / Q000633:toxicity*; D000975:Antioxidants / Q000378:metabolism; D001713:Biphenyl Compounds / Q000737:chemistry; D001854:Bone Marrow Cells / Q000187:drug effects*; D049109:Cell Proliferation / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D003520:Cyclophosphamide / Q000633:toxicity*; D005978:Glutathione / Q000378:metabolism; D006098:Granulocytes / Q000187:drug effects; D008297:Male; D051379:Mice; D018345:Mice, Knockout; D009000:Monocytes / Q000187:drug effects; D051267:NF-E2-Related Factor 2 / Q000037:antagonists & inhibitors / Q000235:genetics*; D010851:Picrates / Q000737:chemistry; D015398:Signal Transduction / Q000187:drug effects* / Q000235:genetics*
chemical_list: D018906:Antineoplastic Agents, Alkylating; D000975:Antioxidants; D001713:Biphenyl Compounds; D051267:NF-E2-Related Factor 2; C495636:Nfe2l2 protein, mouse; D010851:Picrates; D003520:Cyclophosphamide; C004931:1,1-diphenyl-2-picrylhydrazyl; D005978:Glutathione
keywords: CDDO-Me; Cyclophosphamide; Myelosuppression; Nrf2