Curcumin Attenuates Dystrophic Pathology in mdx Mice through Inhibiting NF-κB Activation
Abstract :
The dystrophin-glycoprotein complex has emerged as a scaffold responsible for the membrane docking of signaling proteins. There is no definitive cure available currently. In dystrophin-deficient muscular dystrophy, abnormal activation of signal pathways may play important roles in dystrophic pathogenesis. In this report, we found a natural botanical gradient, curcumin, capable of attenuating dystrophic pathology significantly and the mechanism underlying was involved in NF-κB inhibition. After treating X-linked muscular dystrophy (mdx) mice with 1 to 10 mg of curcumin, the sarcolemmic integrity assessed by
Evans blue staining and muscle strength determined both by grip strength test and traction test were improved significantly. Histological analysis demonstrated that curcumin reduced severity of myofibril necrosis and extent of regenerating fibers as well as the variability in size of fibers. Creatine kinase level and the expressions of tumor necrosis factor alpha, interleukine-1 beta and inducible nitric oxide synthase were decreased also after curcumin treatment. Consistently, elevated NF-κB activity in muscle fibers of mdx mice decreased after curcumin administration. Since curcumin is a non-toxic compound derived from C.longa, which
was widely used in healthy food. The possible effect of curcumin may be worth studying in Duchenne muscular dystrophy therapy.