Pro-inflammatory signaling machinery in muscle cells

The pro-inflammatory signaling machinery in muscle cells refers to the integrated network of intracellular pathways—most notably NF-κB, MAPK (p38, ERK, JNK), and JAK/STAT—that coordinate the myogenic response to inflammatory stimuli (Monici et al., 2020, Frontiers in Physiology; Kyriakis & Avruch, 2012, Physiological Reviews). In skeletal muscle, these pathways are triggered by exogenous pathogens or endogenous cytokines such as TNF-α and IL-6, often resulting in the upregulation of E3 ubiquitin ligases like MuRF-1 and Atrogin-1, which drive muscle atrophy (Bonetto et al., 2012, Journal of Biological Chemistry). While transient activation is necessary for muscle regeneration and adaptation to exercise, chronic or excessive signaling is a primary driver of pathology in conditions like Duchenne muscular dystrophy, polymyositis, and cancer cachexia (Reid & Li, 2001, Journal of Applied Physiology). Pharmacological intervention typically involves the use of corticosteroids or biologics that target specific cytokines or their downstream signaling components to preserve muscle mass and function. However, the multi-functional nature of these pathways means that therapeutic targeting must balance the reduction of pathological inflammation with the preservation of essential immune and regenerative processes. Consequently, broad inhibition can lead to significant safety concerns, including systemic immunosuppression and impaired muscle repair.

Other names

Muscle inflammatory signaling pathwaysMyogenic pro-inflammatory cascadeNF-kappaB/MAPK/JAK-STAT signaling in myocytes

Inhibition of pro-inflammatory cytokine signaling, suppression of nuclear factor kappa-B (NF-κB) activation, and modulation of mitogen-activated protein kinase (MAPK) or JAK/STAT pathways to reduce muscle proteolysis and inflammation.