María Angeles Rosillo1, Marina Sánchez-Hidalgo2, Susana Sánchez-Fidalgo2, Marina Aparicio-Soto2, Isabel Villegas2, Catalina Alarcón-de-la-Lastra3. 1. Department of Pharmacology, Faculty of Pharmacy, University of Seville, Profesor García González, 2, 41012, Seville, Spain. rosillo@us.es. 2. Department of Pharmacology, Faculty of Pharmacy, University of Seville, Profesor García González, 2, 41012, Seville, Spain. 3. Department of Pharmacology, Faculty of Pharmacy, University of Seville, Profesor García González, 2, 41012, Seville, Spain. calarcon@us.es.
Abstract
PURPOSE: Current experimental studies support a beneficial role of extra-virgin olive oil (EVOO) in several inflammatory diseases. The present study was designed to evaluate the effects of dietary EVOO on type II collagen-induced arthritis (CIA) in mice. METHODS: DBA-1/J mice were randomized in four experimental groups (10 or 15 animals per group): (1) Sham sunflower diet (SO-Sham), (2) CIA sunflower diet (SO-CIA), (3) Sham EVOO diet (EVOO-Sham) and (4) CIA EVOO diet (EVOO-CIA) group. After 6 weeks, arthritis was induced by type II collagen. Mice were sacrified 42 days after first immunization. In addition to macroscopic and histological analyses, serum levels of cartilage olimeric matrix protein (COMP), metalloproteinase-3 (MMP-3) and pro-inflammatory cytokines levels were evaluated by ELISA. The expressions of heme oxygenase-1 (HO-1), nuclear factor E2-related factor 2 (Nrf2), mitogen-activated protein kinases (MAPKs), Janus kinase-signal transducer and activator of transcription (JAK/STAT) and nuclear transcription factor-kappa B (NF-κB) pathways were studied by western blotting. RESULTS: EVOO diet significantly reduced joint edema and cartilage destruction, preventing the arthritis development. Dietary EVOO significantly decreased serum COMP and MMP-3 levels, as well as, the pro-inflammatory cytokines levels (TNF-α, IL-1β and IL-17). Moreover, the activation of JAK/STAT, MAPKs and NF-κB pathways was drastically ameliorated. According to Nrf2 and HO-1, the protein expressions were up-regulated in those mice fed with EVOO. CONCLUSION: These results support the interest of EVOO as a beneficial functional food to prevent the development of the rheumatoid arthritis (RA).
PURPOSE: Current experimental studies support a beneficial role of extra-virgin olive oil (EVOO) in several inflammatory diseases. The present study was designed to evaluate the effects of dietary EVOO on type II collagen-induced arthritis (CIA) in mice. METHODS: DBA-1/J mice were randomized in four experimental groups (10 or 15 animals per group): (1) Sham sunflower diet (SO-Sham), (2) CIA sunflower diet (SO-CIA), (3) Sham EVOO diet (EVOO-Sham) and (4) CIA EVOO diet (EVOO-CIA) group. After 6 weeks, arthritis was induced by type II collagen. Mice were sacrified 42 days after first immunization. In addition to macroscopic and histological analyses, serum levels of cartilage olimeric matrix protein (COMP), metalloproteinase-3 (MMP-3) and pro-inflammatory cytokines levels were evaluated by ELISA. The expressions of heme oxygenase-1 (HO-1), nuclear factor E2-related factor 2 (Nrf2), mitogen-activated protein kinases (MAPKs), Janus kinase-signal transducer and activator of transcription (JAK/STAT) and nuclear transcription factor-kappa B (NF-κB) pathways were studied by western blotting. RESULTS:EVOO diet significantly reduced joint edema and cartilage destruction, preventing the arthritis development. Dietary EVOO significantly decreased serum COMP and MMP-3 levels, as well as, the pro-inflammatory cytokines levels (TNF-α, IL-1β and IL-17). Moreover, the activation of JAK/STAT, MAPKs and NF-κB pathways was drastically ameliorated. According to Nrf2 and HO-1, the protein expressions were up-regulated in those mice fed with EVOO. CONCLUSION: These results support the interest of EVOO as a beneficial functional food to prevent the development of the rheumatoid arthritis (RA).
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