AIM OF THE STUDY: Emilia sonchifolia (L.) DC. (Asteraceae) is a medicinal plant traditionally used in Brazilian folk medicine to treat asthma, fever, cuts, wounds and rheumatism. This study was conducted to establish the antinociceptive properties of hydroethanolic extract from aerial parts of Emilia sonchifolia in mice using chemical and thermal models of nociception. MATERIALS AND METHODS: To evaluate the antinociceptive effect of Emilia sonchifolia hydroethanolic extract (EsHE) administered by oral route, peripheral (acetic acid-induced abdominal writhing and formalin), spinal (tail flick) and supra-spinal (hot plate) behavioral models of acute pain were used. High-performance liquid chromatography (HPLC) was used to determine the fingerprint chromatogram of the EsHE. RESULTS: The EsHE at test doses of 100 and 300 mg/kg, p.o. clearly demonstrated antinociceptive activity in all tests. The extract had a stronger antinociceptive effect than morphine. Administration of the opioid receptor antagonist, naloxone, completely inhibited the antinociceptive effect induced by EsHE (100mg/kg). The presence of phenolic compounds in the extract of Emilia sonchifolia was confirmed using HPLC. CONCLUSION: The extract of Emilia sonchifolia markedly exhibits opioid-mediated anti-nociceptive activity action in mice. Thus, may be useful in the treatment of inflammatory hyperalgesic disorders, which supports previous claims of its traditional use.
AIM OF THE STUDY: Emilia sonchifolia (L.) DC. (Asteraceae) is a medicinal plant traditionally used in Brazilian folk medicine to treat asthma, fever, cuts, wounds and rheumatism. This study was conducted to establish the antinociceptive properties of hydroethanolic extract from aerial parts of Emilia sonchifolia in mice using chemical and thermal models of nociception. MATERIALS AND METHODS: To evaluate the antinociceptive effect of Emilia sonchifoliahydroethanolic extract (EsHE) administered by oral route, peripheral (acetic acid-induced abdominal writhing and formalin), spinal (tail flick) and supra-spinal (hot plate) behavioral models of acute pain were used. High-performance liquid chromatography (HPLC) was used to determine the fingerprint chromatogram of the EsHE. RESULTS: The EsHE at test doses of 100 and 300 mg/kg, p.o. clearly demonstrated antinociceptive activity in all tests. The extract had a stronger antinociceptive effect than morphine. Administration of the opioid receptor antagonist, naloxone, completely inhibited the antinociceptive effect induced by EsHE (100mg/kg). The presence of phenolic compounds in the extract of Emilia sonchifolia was confirmed using HPLC. CONCLUSION: The extract of Emilia sonchifolia markedly exhibits opioid-mediated anti-nociceptive activity action in mice. Thus, may be useful in the treatment of inflammatory hyperalgesic disorders, which supports previous claims of its traditional use.
Authors: Jackson Roberto Guedes da Silva Almeida; Edigênia Cavalcante da Cruz Araújo; Luciano Augusto de Araújo Ribeiro; Julianeli Tolentino de Lima; Xirley Pereira Nunes; Ana Sílvia Suassuna Carneiro Lúcio; Maria de Fátima Agra; José Maria Barbosa Filho Journal: ScientificWorldJournal Date: 2012-05-03
Authors: Luis Armando Sawada; Vanessa Sâmia da Conçeição Monteiro; Guilherme Rodrigues Rabelo; Germana Bueno Dias; Maura Da Cunha; José Luiz Martins do Nascimento; Gilmara de Nazareth Tavares Bastos Journal: Biomed Res Int Date: 2014-04-22 Impact factor: 3.411