Exploring neuronal mechanisms of osteosarcopenia in older adults
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Dosyalar
Tarih
2024
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Wiley
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Until recently, research on the pathogenesis and treatment of osteoporosis and sarcopenia has primarily focused on local and systemic humoral mechanisms, often overlooking neuronal mechanisms. However, there is a growing body of literature on the neuronal regulation of bone and skeletal muscle structure and function, which may provide insights into the pathogenesis of osteosarcopenia. This review aims to integrate these neuronal regulatory mechanisms to form a comprehensive understanding and inspire future research that could uncover novel strategies for preventing and treating osteosarcopenia. Specifically, the review explores the functional adaptation of weight-bearing bone to mechanical loading throughout evolutionary development, from Wolff's law and Frost's mechanostat theory to the mosaic hypothesis, which emphasizes neuronal regulation. The recently introduced bone osteoregulation reflex points to the importance of the osteocytic mechanoreceptive network as a receptor in this neuronal regulation mechanism. Finally, the review focuses on the bone myoregulation reflex, which is known as a mechanism by which bone loading regulates muscle functions neuronally. Considering the ageing-related regressive changes in the nerve fibres that provide both structural and functional regulation in bone and skeletal muscle tissue and the bone and muscle tissues they innervate, it is suggested that neuronal mechanisms might play a central role in explaining osteosarcopenia in older adults. image Abstract figure legend The mechanosensitive osteocytic network within the bone matrix acts as a receptor and plays a crucial role in the functional adaptation of bone to mechanical loading. Through mechanotransduction, osteocytes convert mechanical impulses into electrical signals, which are transmitted via afferent nerves to sympathetic preganglionic neurons in the spinal cord and then to ganglionic neurons. Neuropeptides released from postganglionic sympathetic efferent nerves regulate bone formation and resorption processes. Additionally, osteocytes regulate skeletal muscle function by activating motor neurons in the spinal cord via afferent nerves. Disruption of this neuronal regulation mechanism can lead to bone loss and sarcopenia. image
Açıklama
Anahtar Kelimeler
ageing, bone loss, dysmobility syndrome, muscle weakness, osteocyte, osteoporosis, osteosarcopenia
Kaynak
Journal of Physiology-London
WoS Q Değeri
N/A
