Red light-emitting diode treatment improves tissue recovery in DSS-induced colitis in mice
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
Authors: de Paula-Silva, Marina; Broering, Milena Fronza; Scharf, Pablo; Oliveira da Rocha, Gustavo Henrique; Farsky, Sandra; Lino-dos-Santos-Franco, Adriana
Abstract
Inflammatory bowel diseases are debilitating illnesses characterized by severe inflammation of the gastrointestinal tract. Treatments currently available are expensive and ineffective. We here investigated the role of red-light emitting diode (LED) on dextran sodium sulfate (DSS)-induced colitis. DSS was added to the drinking water of male mice at days 0, 2, 4 and withdrawn at day 6. LED irradiation was performed daily for 90s from day 6 to 9 on the right and left sides of the ventral surface and beside the external anal region. LED treatment decreased the amount of crypt dysplasia/edema, inflammatory infiltrates and ulcers, attenuated apoptosis and increased proliferation of crypt cells. Also, LED treatment induced expression of annexin Al in the damaged epithelium, preserved the organization of claudin-1 and skewed cytokine profiling towards a more anti-inflammatory status. Thus, LED treatment promotes structural protection and modulates the inflammatory response, constituting a potential non-invasive and low-cost combined therapy to help patients achieve disease remission.
The impact of high-intensity interval training on inflammatory markers in metabolic disorders: A meta-analysis
SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS
Authors: Khalafi, Mousa; Symonds, Michael E.
Abstract
Introduction High-intensity interval training (HIIT) is considered a time-efficient strategy to improve metabolic health. We performed a systematic meta-analysis to assess the effects of HIIT on inflammatory markers and adipo-cytokines compared with control conditions (CON) or moderate-intensity continuous training (MICT) in individuals with metabolic disorders. Methods Up to January 2020, electronic databases were searched for HIIT interventions based on populations with metabolic disorders including diabetes, metabolic syndrome, polycystic ovary syndrome, non-alcoholic fatty liver disease or overweight/obesity, with outcome measurements that included IL-6, TNF-alpha, CRP, leptin or adiponectin and training >= 2 weeks. Random-effects models were used to aggregate a mean effect size (ES), 95% confidence intervals (Cis), and potential moderators were explored. Results Twenty-nine studies involving 841 participants were included in the meta-analysis. HIIT improved circulating adiponectin (P = .02), leptin (P = .02), and TNF-alpha (P = .003) when compared to CON. There were no differences between groups in IL-6 and CRP. Intervention duration was a significant moderator for the effect of HIIT on IL-6, and leptin (P < .05). Conclusion High-intensity interval training improves circulating TNF-alpha, leptin and adiponectin, thereby indicating that it may be an effective and time-efficient intervention for controlling low-grade inflammation in individuals with metabolic disorders.