Skeletal muscle pathology in Huntington’s Disease.

Frontiers in Physiology

Michal eMielcarek¹  Izabela ePiotrowska²  Jerzy T Marcinkowski³  Daniel eZielonka³ 

[1] King's College London;MRC National Institute for Medical Research;Poznan University of Medical Sciences;

关键词: Atrophy;    skeletal muscle;    Huntington’s disease;    peripheral pathology;    disease modifying treatment;   

DOI  :  10.3389/fphys.2014.00380

来源: DOAJ

【 摘 要 】

Huntington’s disease (HD) is a hereditary neurodegenerative disorder caused by the expansion of a polyglutamine stretch within the huntingtin protein (HTT). The neurological symptoms, that involve motor, cognitive and psychiatric disturbances, are caused by neurodegeneration that is particularly widespread in the basal ganglia and cereberal cortex. HTT is ubiquitously expressed and in recent years it has become apparent that HD patients experience a wide array of peripheral organ dysfunction including severe metabolic phenotype, weight loss, HD-related cardiomyopathy and skeletal muscle wasting, . Although skeletal muscles became a hallmark of HD, the mechanisms underlying muscular atrophy in this disorder are unknown. Skeletal muscles account for approximately 40% of body mass and are highly adaptive to physiological and pathological conditions that may result in muscle hypertrophy (due to increased mechanical load) or atrophy (inactivity, chronic disease states). The atrophy is caused by degeneration of myofibers and their replacement by fibrotic tissue is the major pathological feature in many genetic muscle disorders. Under normal physiological conditions the muscle function is orchestrated by a network of intrinsic hypertrophic and atrophic signals linked to the functional properties of the motor units that are likely to be imbalanced in HD. In this article, we highlight the emerging field of research with particular focus on the recent studies of the skeletal muscle pathology and the identification of new disease-modifying treatments.

【 授权许可】

Unknown