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Mouse models of sarcopenia: classification and evaluation.

Wen-Qing Xie1,2, Miao He1,2, Deng-Jie Yu1,2

  • 1Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China.

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Sarcopenia, a muscle disease increasing with age, leads to falls and disabilities. This review examines mouse models crucial for understanding sarcopenia

Keywords:
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Area of Science:

  • Gerontology
  • Muscle Physiology
  • Pathology

Background:

  • Sarcopenia is a progressive skeletal muscle disease associated with aging.
  • It increases the risk of falls, fractures, physical disability, and mortality.
  • Understanding sarcopenia's molecular mechanisms and developing effective treatments remain challenging due to its subtle early symptoms and variable clinical presentation.

Purpose of the Study:

  • To review available mouse models for sarcopenia research.
  • To analyze the advantages, disadvantages, and applicability of each model.
  • To summarize methods for evaluating sarcopenia in these models.

Main Methods:

  • Review of literature on various mouse models for sarcopenia.
  • Categorization of models including aging, genetically engineered, hindlimb suspension, chemical induction, denervation, and immobilization.
  • Analysis of model-specific characteristics and evaluation techniques.

Main Results:

  • Multiple mouse models exist for studying sarcopenia, each with unique strengths and limitations.
  • Aging models, genetically engineered models, and functional impairment models (hindlimb suspension, denervation, immobilization) offer different insights.
  • Chemical induction models provide another avenue for exploring sarcopenia mechanisms.

Conclusions:

  • Mouse models are essential for elucidating sarcopenia's pathophysiology and developing therapeutic strategies.
  • Selecting the appropriate model is critical for effective research and treatment evaluation.
  • Standardized evaluation methods are needed for consistent results across studies.