Diosgenin ameliorates development of neuropathic pain in diabetic rats: Involvement of oxidative stress and inflammation.
Schlüsselwörter
Abstrakt
Neuropathic pain is one of the prevalent complications of diabetes mellitus (DM). Oxidative stress and inflammation are the principal determinants for its development. Pharmacological interventions targeted at alleviating or suppressing these pathways are clinically promising. Diosgenin is a natural steroidal saponin with anti-diabetic and multiple protective properties. This study was designed to study the efficacy of chronic diosgenin administration on alleviation of hyperalgesia in streptozotocin (STZ)-diabetic rats. Rats were allocated to control, diosgenin-treated control, diabetic, and diosgenin-treated-diabetic groups. Diosgenin was daily administered at a dose of 40mg/kg for 5 weeks. Nociceptive behavior was assessed using paw pressure, hot tail immersion, and formalin tests. In addition, some oxidative stress and inflammation markers were measured. Diosgenin treatment of diabetic group increased mechanical and thermal nociceptive thresholds and lowered pain score at late phase of the formalin test, but not at its early phase. Biochemical analysis of serum samples and sciatic nerve and dorsal root ganglion (DRG) lysates showed restoration or improvement of nuclear factor-