Deficit in voluntary wheel running in chronic inflammatory and neuropathic pain models in mice: Impact of sex and genotype.

Deficit in voluntary wheel running in chronic inflammatory and neuropathic pain models in mice: Impact of sex and genotype. Behav Brain Res. 2020 Nov 09;:113009 Authors: Contreras KM, Caillaud M, Neddenriep B, Bagdas D, Roberts JL, Ulker E, White AB, Aboulhosn R, Toma W, Khalefa T, Adel A, Mann JA, Damaj MI Abstract Patients with chronic pain report decreased general activity and emotional distress. Therefore, the development of various animal models that encompass different aspects of pain are crucial for the discovery of genetic differences and the assessment of novel analgesics to improve quality of life. C57BL/6 J and DBA/2 J mice received unilateral intraplantar injections of 100% CFA, Paclitaxel, or CCI surgery to compare their distance traveled in a voluntary wheel running assay, paw edema diameter, and mechanical sensitivity. Mechanical withdrawal thresholds were lower in both strains of mice that received CFA when compared to their vehicle. However, a decrease in distance traveled was observed in CFA-treated C57BL/6 J but not DBA/2 J mice. In a separate group, chemotherapy agent paclitaxel 8 mg/kg, i.p. was administered to both strains of mice to induce cause CIPN which was confirmed by lower mechanical thresholds in paclitaxel-treated mice compared to vehicle-treated mice. Only female C57BL/6 J mice showed attenuation of distance traveled following treatment whereas male C57BL/6 J and DBA/2 J mice did not. L...
Source: Behavioural Brain Research - Category: Neurology Authors: Tags: Behav Brain Res Source Type: research