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Intermittent vibration protects aged muscle from mechanical and oxidative damage under prolonged compression. J Biomech 2017; 55:113-120. [DOI: 10.1016/j.jbiomech.2017.02.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 01/02/2017] [Accepted: 02/16/2017] [Indexed: 11/30/2022]
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Wong SW, Yao Y, Hong Y, Ma Z, Kok SHL, Sun S, Cho M, Lee KKH, Mak AFT. Preventive Effects of Poloxamer 188 on Muscle Cell Damage Mechanics Under Oxidative Stress. Ann Biomed Eng 2016; 45:1083-1092. [PMID: 27650939 DOI: 10.1007/s10439-016-1733-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 09/10/2016] [Indexed: 12/31/2022]
Abstract
High oxidative stress can occur during ischemic reperfusion and chronic inflammation. It has been hypothesized that such oxidative challenges could contribute to clinical risks such as deep tissue pressure ulcers. Skeletal muscles can be challenged by inflammation-induced or reperfusion-induced oxidative stress. Oxidative stress reportedly can lower the compressive damage threshold of skeletal muscles cells, causing actin filament depolymerization, and reduce membrane sealing ability. Skeletal muscles thus become easier to be damaged by mechanical loading under prolonged oxidative exposure. In this study, we investigated the preventive effect of poloxamer 188 (P188) on skeletal muscle cells against extrinsic oxidative challenges (H2O2). It was found that with 1 mM P188 pre-treatment for 1 h, skeletal muscle cells could maintain their compressive damage threshold. The actin polymerization dynamics largely remained stable in term of the expression of cofilin, thymosin beta 4 and profilin. Laser photoporation demonstrated that membrane sealing ability was preserved even as the cells were challenged by H2O2. These findings suggest that P188 pre-treatment can help skeletal muscle cells retain their normal mechanical integrity in oxidative environments, adding a potential clinical use of P188 against the combined challenge of mechanical-oxidative stresses. Such effect may help to prevent deep tissue ulcer development.
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Affiliation(s)
- Sing Wan Wong
- Division of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
| | - Yifei Yao
- Division of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
| | - Ye Hong
- Division of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
| | - Zhiyao Ma
- Division of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
| | - Stanton H L Kok
- School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
| | - Shan Sun
- Department of Bioengineering, University of Illinois at Chicago, Chicago, IL, 60607, USA
| | - Michael Cho
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX, 76019, USA
| | - Kenneth K H Lee
- School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
| | - Arthur F T Mak
- Division of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong.
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Change in viability of C2C12 myoblasts under compression, shear and oxidative challenges. J Biomech 2016; 49:1305-1310. [DOI: 10.1016/j.jbiomech.2016.03.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 03/08/2016] [Accepted: 03/10/2016] [Indexed: 01/27/2023]
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Effects of oxidative stress-induced changes in the actin cytoskeletal structure on myoblast damage under compressive stress: confocal-based cell-specific finite element analysis. Biomech Model Mechanobiol 2016; 15:1495-1508. [DOI: 10.1007/s10237-016-0779-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 03/03/2016] [Indexed: 01/07/2023]
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