Suplementação de ácidos graxos poli-insaturados ômega-3 reduz marcadores inflamatórios e melhora a ação da insulina em fígado de camundongos

A double- blind, randomized, and placebo-controlled clinical trial with omega-3 polyunsaturated fatty acids (OPFA ɷ-3) for the prevention of migraine in chronic migraine patients using amitriptyline

OBJECTIVE

To determine the prophylactic effect of OPFAϖ-3 in migraine.

SUBJECTS AND METHODS

This was a prospective, experimental, controlled, double-blind, and with comparison groups study. Sixty patients diagnosed with chronic migraine, according to the criteria of the International Classification of Headache Disorders, Third Edition (beta version) (ICHD-3β), were prophylactically treated with amitriptyline. They were divided into two equal groups: in group 1, prophylaxis was associated with OPFAϖ-3 and in group 2 with placebo. After 60 days, both groups were assessed by a second researcher.

RESULTS

Of the 60 patients with chronic migraine, only 51 patients (15 men and 36 women) completed the treatment. The group that received OPFAϖ-3 consisted of 27 (52.9%) patients (six men and 21 women), while the control group was equal to 24 (47.1%) patients (nine men and 15 women). These differences were not significant (χ² = 1.428; P = 0.375). In 66.7% (18/27) of the patients who used OPFAϖ-3, there was a reduction of more than 80.0% per month in the number of days of headache, while in the control group, the same improvement occurred in 33.3% (8/24) of patients. This difference was significant (χ² = 5.649; P = 0.036).

CONCLUSIONS

Polyunsaturated omega 3 fatty acids (OPFAϖ-3) are useful for prophylaxis of migraine attacks.

Resveratrol reduces chronic inflammation and improves insulin action in the myocardium of high-fat diet-induced obeserats

OBJECTIVE: To evaluate the effects of resveratrol on insulin signaling and inflammation pathway in the myocardium of high-fat diet-induced obese rats. METHODS: Thirty Wistar rats were divided into a control group (n=10, standard diet), obese group (n=10, high-fat diet), and obese supplemented with resveratrol group (n=10, 20 mg/kg/day) for eight weeks. An insulin tolerance test was performed at the end of the study period "0" (without insulin), 5, 10, 15, 20, 25, and 30 minutes after an intraperitoneal injection of insulin (2 U/kg). Body and epididymal adipose tissue were weighed. Fragments of the myocardium were extracted for Western blot analyses of insulin pathway and proinflammatory molecules. RESULTS: Resveratrol increased the rate of glucose disappearance, phosphorylation of the insulin receptor, insulin receptor substrate 1, and protein kinase B; and reduced expression of tumor necrosis factor alpha and of the molecules involved in proinflammatory signal transduction, namely Ikappa B kinase and nuclear factor kappa B complex. The results also suggest that higher insulin sensitivity and lower levels of proinflammatory molecules occurred regardless of weight and epididymal adipose tissue loss. CONCLUSION: Resveratrol increases insulin action and reduces inflammatory molecules in the myocardium.