中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (17): 3588-3595.doi: 10.12307/2025.650

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

不同时间按压刺激对大鼠骨骼肌形态学及肿瘤坏死因子α、核因子κB的影响

石培丽1,林  森2,赵文腾1,彭亚力1,胡亚哲1   

  1. 1华中师范大学体育学院,湖北省武汉市  430079;2武汉体育学院体育科技学院,湖北省武汉市  430205
  • 收稿日期:2024-07-15 接受日期:2024-08-19 出版日期:2025-06-18 发布日期:2024-11-01
  • 通讯作者: 胡亚哲,博士,副教授,硕士生导师,华中师范大学体育学院,湖北省武汉市 430079
  • 作者简介:石培丽,女,1999年生,山西省临汾市人,汉族,华中师范大学体育学院在读硕士,主要从事运动损伤的预防与治疗研究。
  • 基金资助:
    华中师范大学科研发展基金(20206982475),项目负责人:胡亚哲

Effects of pressor stimulation at different times on rat skeletal muscle morphology and tumor necrosis factor alpha and nuclear factor kappaB

Shi Peili1, Lin Sen2, Zhao Wenteng1, Peng Yali1, Hu Yazhe1   

  1. 1School of Physical Education and Sports, Central China Normal University, Wuhan 430079, Hubei Province, China; 2School of Sports Science and Technology, Wuhan Sports University, Wuhan 430205, Hubei Province, China 
  • Received:2024-07-15 Accepted:2024-08-19 Online:2025-06-18 Published:2024-11-01
  • Contact: Hu Yazhe, PhD, Associate professor, Master’s supervisor, School of Physical Education and Sports, Central China Normal University, Wuhan 430079, Hubei Province, China
  • About author:Shi Peili, Master candidate, School of Physical Education and Sports, Central China Normal University, Wuhan 430079, Hubei Province, China
  • Supported by:
    Research and Development Fund of Central China Normal University, No. 20206982475 (to HYZ)

摘要:


文题释义:
按压刺激:使用机械压力持续作用于某部位而产生的刺激性。
炎性因子:也被称为炎症因子,是指参与炎症反应的各种细胞因子。这些细胞因子在炎症反应中扮演着重要角色,通过细胞间的信息传递和调控,影响细胞的生理活动。

背景:研究发现不同时间长度按压点刺激正常肌肉,将产生不同的生理反应。
目的:探讨在不同时间机械压力按压下,大鼠骨骼肌内炎性因子肿瘤坏死因子α及核因子κB表达的变化。
方法:健康SPF级SD雄性大鼠20只,随机分为空白对照组、10 s按压组、20 s按压组及30 s按压组,每只大鼠的单侧右腿用于实验。空白对照组不予干预,各按压组大鼠经2%戊巴比妥钠(35 mg/kg)腹腔注射麻醉后,使用自制机械压力装置,将压强固定在200 kPa,分别持续按压大鼠股薄肌10,20,30 s,随后即刻取右后肢按压处肌肉组织。苏木精-伊红染色观察骨骼肌组织形态学变化及肌纤维横截面积的变化,免疫组织化学检测骨骼肌肿瘤坏死因子α及核因子κB表达水平。
结果与结论:①苏木精-伊红染色结果显示,各按压组大鼠骨骼肌肌纤维排列松散,肌纤维横截面积和直径变小,骨骼肌间隙变大。与空白对照组相比,各按压组骨骼肌肌纤维的横截面积显著减小(P < 0.05),3个按压组之间骨骼肌肌纤维的横截面积差异无显著性意义(P > 0.05)。10 s按压组肌纤维间隙中未见明显红细胞,20 s按压组间隙中出现少量红细胞,30 s按压组骨骼肌肌纤维间毛细血管扩张,间隙中出现红细胞。②30 s按压组的骨骼肌肿瘤坏死因子α的表达水平显著高于空白对照组(P < 0.05)。③各组间的骨骼肌核因子κB的表达水平比较差异无显著性意义(P > 0.05)。④结果说明,压强固定在200 kPa时,骨骼肌经过按压会发生形态学变化,肌纤维横截面积减少,但按压10,20,30 s骨骼肌形态学及骨骼肌纤维横截面积无显著差异。随着时间点的变化,按压骨骼肌至30 s时,炎性因子肿瘤坏死因子α启动,但对核因子κB没有影响,推测短时间内炎性因子可出现表达,而转录因子未见明显变化。  
https://orcid.org/0009-0001-5199-5541(石培丽);https://orcid.org/0000-0003-2848-7562(胡亚哲)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: 骨骼肌, 炎性因子, 肿瘤坏死因子α, 核因子κB, 工程化细胞因子, 工程化组织构建

Abstract: BACKGROUND: Studies have shown that different durations of pressure application on normal muscles can produce varying physiological responses.
OBJECTIVE: To explore the expression levels of inflammatory factors tumor necrosis factor α and nuclear κB in skeletal muscle under different pressure durations.
METHODS: Twenty healthy male SPF-grade Sprague-Dawley rats were randomly divided into four groups: control group, 10-second pressure group, 20-second pressure group, and 30-second pressure group. The right leg of each rat was used for the experiment. The control group received no intervention, while rats in each pressure group were anesthetized by intraperitoneal injection of 2% pentobarbital sodium (35 mg/kg), and the thin femoral muscle of the rats was pressed continuously at a constant pressure of 200 kPa using a homemade mechanical pressure device for 10, 20, and 30 seconds, respectively. Muscle tissue at the pressing site of the right hind limb was collected immediately after pressure. Hematoxylin-eosin staining was used to observe the morphological changes of skeletal muscle tissues and changes in the cross-sectional area of muscle fibers, and immunohistochemistry was used to detect the expression levels of tumor necrosis factor α and nuclear factor κB in rat skeletal muscle.

RESULTS AND CONCLUSION: Hematoxylin-eosin staining results revealed that the pressure groups showed loosely arranged skeletal muscle fibers, reduced cross-sectional area and diameter, and enlarged intermuscular spaces. Compared with the control group, the cross-sectional area of muscle fibers was significantly reduced in the pressure groups (P < 0.05), but there was no significant difference between the three pressure groups (P > 0.05). The 10-second pressure group showed no significant presence of red blood cells in the interstitial spaces, while the 20-second pressure group exhibited a small amount of red blood cells, and the 30-second pressure group showed capillary dilation with red blood cells in the interstitial spaces. The expression level of tumor necrosis factor α in the 30-second pressure group was significantly higher than that in the control group (P < 0.05). The expression level of nuclear factor κB in skeletal muscle showed no significant difference among groups (P > 0.05). To conclude, skeletal muscle undergoes morphological changes and reduced cross-sectional area after pressure at 200 kPa, but there is no significant difference among the 10-, 20-, and 30-second pressure groups. As the duration of pressure increases to 30 seconds, the inflammatory factor tumor necrosis factor α is activated, but nuclear factor κB remains unaffected, suggesting that inflammatory factors may express under short-term pressure, while transcription factors show no significant change.


中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

Key words: skeletal muscle, inflammatory factor, tumor necrosis factor α, nuclear factor κB, engineered cytokine, engineered tissue construction

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