KEM 8.2 New version
Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) is characterized by Post-Exertional Malaise (PEM), a delayed exacerbation of symptoms after physical, cognitive, emotional, or autonomic challenge. Current energy-metabolism models do not by themselves explain its delayed, nonlinear time course.
The Kinetic Elasticity Model (KEM) proposes that different ME/CFS phenotypes can converge on a common regulatory bottleneck in receptor signaling. Candidate upstream mechanisms include functional GPCR autoantibodies affecting adrenergic and muscarinic signaling and chronically elevated endogenous neuronal/autonomic activation. Increased receptor utilization can drive GRK-dependent phosphorylation, β-arrestin recruitment, desensitization/internalization, trafficking, and delayed recovery. When recovery is slow relative to repeated activation, regulatory burden can accumulate ...