El-Sheikh Amal Ahmed, El-Kordy Eman Ali, Issa Sara Alaa
Department of Anatomy, College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.
Department of Anatomy, College of Medicine, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia.
J Microsc Ultrastruct. 2021 Jun 3;10(2):63-71. doi: 10.4103/jmau.jmau_85_20. eCollection 2022 Apr-Jun.
Muscle injuries represent a great part of athletic injuries. The repairing of skeletal muscle after injury is highly influenced by its regenerative response that may be affected by thermotherapy.
This research examined the consequence of heat therapy on muscle recovery after skeletal muscle injury in rats.
Forty-five male adult albino rats were classified into three groups: control, cardiotoxin-injected without heat (nonheating group), and cardiotoxin-injected with heat (heating group). Muscle injury was caused by the injection of cardiotoxin intramuscularly into the tibialis anterior muscles. Heating treatment (40°C for 20 min) was started immediately after the injury. Subsequent observations were performed at day 1, 3, and 7 after injury, including histological imaging and vimentin immunostaining expression.
In the heating group, the regenerating myotubes, having two or more central nuclei, first looked at 3 days after muscle injury, while in the nonheating group, the regenerating fibers were first observed at 7 days after muscle injury. Immunohistochemically, the vimentin reactions were absent in control muscle fibers but were identified in regenerating muscle fiber of the heating group earlier than in the nonheating group.
Starting of heat treatment immediately after muscle injury promoted the regeneration of muscle fibers.
肌肉损伤在运动损伤中占很大比例。损伤后骨骼肌的修复受到其再生反应的高度影响,而热疗可能会影响这种再生反应。
本研究探讨热疗对大鼠骨骼肌损伤后肌肉恢复的影响。
45只成年雄性白化大鼠分为三组:对照组、注射心脏毒素但无热疗组(非热疗组)和注射心脏毒素并进行热疗组(热疗组)。通过向胫骨前肌内注射心脏毒素造成肌肉损伤。损伤后立即开始热疗(40°C,持续20分钟)。在损伤后第1天、第3天和第7天进行后续观察,包括组织学成像和波形蛋白免疫染色表达。
在热疗组中,有两个或更多中央核的再生肌管在肌肉损伤后3天首次出现,而在非热疗组中,再生纤维在肌肉损伤后7天首次观察到。免疫组织化学分析显示,对照组肌肉纤维中无波形蛋白反应,但热疗组再生肌肉纤维中的波形蛋白反应比非热疗组出现得更早。
肌肉损伤后立即开始热疗可促进肌肉纤维再生。