title: Recombinant human neuregulin-1β is protective against radiation-induced myocardial cell injury.
abstract: The aim of the present study was to investigate the role of recombinant human neuregulin-1β (rhNRG-1β) in the repair of the radiation-induced damage of myocardial cells and the underlying mechanism. Rats were divided into the radiotherapy alone group, the rhNRG-1β group (radiotherapy with rhNRG‑1β treatment) and the Herceptin group (radiotherapy with Herceptin treatment), and their myocardial cells were analyzed. The morphology of the myocardial cells was observed under an optical microscope, and the expression of γ‑H2AX and p53 was analyzed using immunohistochemistry and western blot analysis. Damage to the myocardial cells was identified in the three groups following radiation treatment, which was identified by cell swelling and altered morphology. The integrated optical density values of γ‑H2AX in the radiotherapy alone, rhNRG‑1β and Herceptin groups were 50.96±5.548, 27.63±10.61 and 76.12±2.084, respectively. The OD of the radiotherapy alone group was significantly higher than that of the rhNRG‑1β treated group (P<0.0001), and the value of the Herceptin group was significantly higher than that of the radiotherapy alone group (P<0.0001). The p53 level in the rhNRG‑1β group was less than that of the radiotherapy alone group (P<0.001), and was higher in the Herceptin group compared with the radiotherapy alone group (P<0.0001). Thus, rhNRG‑1β can ameliorate radiotherapy-induced myocardial cell injury, predominantly by enhancing myocardial cell DNA repair, inhibiting cell apoptosis and improving myocardial function. The results of this study in myocardial cells suggest that patients with thoracic cancer may benefit from treatment with rhNRG‑1β for the repair of the radiation-induced damage of myocardial cells.
authors.affiliation: Department of Medical Oncology, Huangshi Central Hospital, Huangshi, Hubei 435000, P.R. China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Zhou
authors.affiliation: Department of Medical Oncology, Huangshi Central Hospital, Huangshi, Hubei 435000, P.R. China.
authors.forename: Wenbing
authors.initials: W
authors.lastname: Hu
authors.affiliation: Department of Medical Oncology, Huangshi Central Hospital, Huangshi, Hubei 435000, P.R. China.
authors.forename: Xinxiong
authors.initials: X
authors.lastname: Fei
authors.affiliation: Department of Medical Oncology, Huangshi Central Hospital, Huangshi, Hubei 435000, P.R. China.
authors.forename: Xuqun
authors.initials: X
authors.lastname: Huang
authors.affiliation: Department of Medical Oncology, Huangshi Central Hospital, Huangshi, Hubei 435000, P.R. China.
authors.forename: Xi
authors.initials: X
authors.lastname: Chen
authors.affiliation: Department of Medical Oncology, Huangshi Central Hospital, Huangshi, Hubei 435000, P.R. China.
authors.forename: Deqing
authors.initials: D
authors.lastname: Zhao
authors.affiliation: Department of Medical Oncology, Huangshi Central Hospital, Huangshi, Hubei 435000, P.R. China.
authors.forename: Jun
authors.initials: J
authors.lastname: Huang
authors.affiliation: Department of Medical Oncology, Huangshi Central Hospital, Huangshi, Hubei 435000, P.R. China.
authors.forename: Lan
authors.initials: L
authors.lastname: Jiang
authors.affiliation: Department of Medical Oncology, Huangshi Central Hospital, Huangshi, Hubei 435000, P.R. China.
authors.forename: Gangsheng
authors.initials: G
authors.lastname: Wang
mesh_terms: D000818:Animals; D015870:Gene Expression; D006657:Histones / Q000235:genetics / Q000378:metabolism; D006801:Humans; D032383:Myocytes, Cardiac / Q000187:drug effects* / Q000378:metabolism / Q000473:pathology / Q000528:radiation effects*; D020890:Neuregulin-1 / Q000494:pharmacology*; D020011:Protective Agents / Q000494:pharmacology*; D011832:Radiation Injuries / Q000188:drug therapy / Q000378:metabolism* / Q000473:pathology; D051381:Rats; D011994:Recombinant Proteins / Q000494:pharmacology*; D016159:Tumor Suppressor Protein p53 / Q000235:genetics / Q000378:metabolism
chemical_list: D006657:Histones; D020890:Neuregulin-1; D020011:Protective Agents; D011994:Recombinant Proteins; D016159:Tumor Suppressor Protein p53