Avaliação do efeito do citral na dor neuropática e na inflamação

• Autor(a) principal: Nishijima, Catarine Massucato [UNESP]
• Data de Publicação: 2014
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/123841; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/11-05-2015/000823617.pdf
• topic: Sistema nervoso - Ferimentos e lesões; Neuropatia; Dor pós-operatória; Terpenos; Postoperative pain

Injuries to the system peripheral nervous that result in neuropathic pain may evolve substantial functional loss and decreased quality of life of patients by permanent loss of sensory-motor functions. Surgeries such as breast, cardiac, thoracic, abdominal surgeries, caesarean and amputations culminate with the acute postoperative pain (APP) followed by persistent pain. Approximately 10% of patients develop chronic pain lasting between 3-6 months after surgery. The sensation of pain is exacerbated by simple activities such as walking, coughing and innocuous stimuli as touch and temperature. Another clinical condition investigated in this work is the chronic pain in Complex Regional Pain Syndrome type I (CRPS- I). CRPS- I is a multifactorial chronic neuropathy, resulting from deep tissue injury such as sprains, fractures, tourniquet, heart attack, stroke and vascular changes as Raynaud's phenomenon. The clinical management of neuropathic pain is complex, since it shows refractory to medications available, so this is the reason to evaluation of new agents with potential antinociceptive. Citral, a terpene widely found in essential oils of lemongrass, melissa, among other species, have been studied for its pharmacological properties, such as its agonist effect on channels TRP (transient receptor potential). In this work, we found that citral, at the doses of 100 mg/kg and 300 mg/kg (p.o), has antinociceptive and antiinflammatory in models of acute nociception and inflammation (formalin test, hot plate, acute postoperative pain and edema xylene -induced ear) without modifying the coordination and locomotor performance of the animals. Mice have exhibited a reduction of nociceptive threshold in chronic pain models after ischemia and reperfusion and partial sciatic nerve constriction with a maximal effect obtained at the dose of 100 mg/kg (p.o.) between 1 and 2 hours after administration. Citral (100 mg/kg, p.o.) was able to inhibit the licking ...