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Du Z, Liu H, Huang X, Li Y, Wang L, Liu J, Long S, Li R, Xiang Q, Luo S. Design and Synthesis of a Mitochondria-Targeting Radioprotectant for Promoting Skin Wound Healing Combined with Ionizing Radiation Injury. Pharmaceuticals (Basel) 2022; 15:ph15060721. [PMID: 35745640 PMCID: PMC9229538 DOI: 10.3390/ph15060721] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 05/25/2022] [Accepted: 05/31/2022] [Indexed: 11/18/2022] Open
Abstract
Wound healing is seriously retarded when combined with ionizing radiation injury, because radiation-induced excessive reactive oxygen species (ROS) profoundly affect cell growth and wound healing. Mitochondria play vital roles not only as cellular energy factories but also as the main source of endogenous ROS, and in this work a mitochondria-targeting radioprotectant (CY-TMP1) is reported for radiation injury-combined wound repair. It was designed, synthesized and screened out from different conjugates between mitochondria-targeting heptamethine cyanine dyes and a peroxidation inhibitor 2,2,6,6-tetramethylpiperidinyloxy (TEMPO). CY-TMP1 specifically accumulated in mitochondria, efficiently mitigated mitochondrial ROS and total intracellular ROS induced by 6 Gy of X-ray ionizing irradiation, thereby exhibiting a notable radioprotective effect. The mechanism study further demonstrated that CY-TMP1 protected mitochondria from radiation-induced injury, including maintaining mitochondrial membrane potential (MMP) and ATP generation, thereby reducing the ratio of cell apoptotic death. Particularly, an in vivo experiment showed that CY-TMP1 could effectively accelerate wound closure of mice after 6 Gy of whole-body ionizing radiation. Immunohistochemical staining further indicated that CY-TMP1 may improve wound repair through angiogenesis and re-epithelialization. Therefore, mitochondria-targeting ROS scavengers may present a feasible strategy to conquer refractory wound combined with radiation injury.
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Affiliation(s)
- Zaizhi Du
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing 400038, China; (Z.D.); (X.H.); (J.L.); (S.L.); (R.L.)
| | - Han Liu
- Center of Emergency, First Affiliated Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China; (H.L.); (Y.L.)
| | - Xie Huang
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing 400038, China; (Z.D.); (X.H.); (J.L.); (S.L.); (R.L.)
| | - Yang Li
- Center of Emergency, First Affiliated Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China; (H.L.); (Y.L.)
| | - Liting Wang
- Biomedical Analysis Center, Third Military Medical University (Army Medical University), Chongqing 400038, China;
| | - Jing Liu
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing 400038, China; (Z.D.); (X.H.); (J.L.); (S.L.); (R.L.)
| | - Shuang Long
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing 400038, China; (Z.D.); (X.H.); (J.L.); (S.L.); (R.L.)
| | - Rong Li
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing 400038, China; (Z.D.); (X.H.); (J.L.); (S.L.); (R.L.)
| | - Qiang Xiang
- Center of Emergency, First Affiliated Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China; (H.L.); (Y.L.)
- Correspondence: (Q.X.); (S.L.)
| | - Shenglin Luo
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University (Army Medical University), Chongqing 400038, China; (Z.D.); (X.H.); (J.L.); (S.L.); (R.L.)
- Correspondence: (Q.X.); (S.L.)
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