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Regenerative Activity of Muscle Tissue and Thymus Status in Young and Old mdx Mice with Muscle Injury and Wound Xenoplasty

机译:老年和老年mdx小鼠肌肉损伤和伤口异种置换术中肌肉组织的再生活性和胸腺状况

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摘要

Responses of the skeletal muscle tissue and thymus to muscle injury (complete transection) and wound xenoplasty with the minced muscle tissue of newborn rats (tissue therapy) were studied in mdx mice aged 12-16 and 40-48 weeks. The muscle tissue of mdx mice has genetic defects causing chronic dystrophic processes in it. The muscle tissue of young mdx mice proved to retain a relatively high capacity for regeneration. Under conditions of tissue therapy of the wound, the formation of muscle fibers from muscle cells of the graft and active regeneration of muscle fibers in the recipient mice were observed, and no structural defects were detected in the thymus. The capacity of posttraumatic regeneration in old mdx mice was lower. The xeno-genic graft was undergoing resorption, thereby suppressing regeneration of muscle fibers and causing further tissue destruction in the injured muscle. The thymus parenchyma was subject to degenerative changes such as the formation of gaps, hemorrhagic foci, and increased numbers of macrophages and mast cells.
机译:在12-16周和40-48周龄的mdx小鼠中研究了新生大鼠骨骼肌组织和胸腺对肌肉损伤(完全横断)和伤口异种整形的反应(组织疗法)。 mdx小鼠的肌肉组织具有遗传缺陷,导致其中的慢性营养不良过程。年轻的mdx小鼠的肌肉组织被证明保留了较高的再生能力。在伤口的组织治疗条件下,观察到了移植小鼠肌肉细胞中肌肉纤维的形成以及受体小鼠中肌肉纤维的主动再生,并且在胸腺中未检测到结构缺陷。老mdx小鼠的创伤后再生能力较低。异种移植物正在吸收,从而抑制了肌肉纤维的再生并在受伤的肌肉中进一步破坏了组织。胸腺实质发生退行性变化,如形成缝隙,出血灶,巨噬细胞和肥大细胞数量增加。

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