Antioxidant potential of dietary chia seed and oil (Salvia hispanica L.) in diet-induced obese rats

This study aimed to investigate the effects of dietary chia seed and oil on plasma and liver oxidative status in diet-induced obese rats. Thirty-six Wistar rats were divided in six groups (6 animals each): control group was fed the American Institute of Nutrition (AIN)-93 M diet; HFF group was fed a high-fat and high-fructose (HFF) diet; chia seed short (6-weeks) and long (12-weeks) treatments received an HFF diet with chia seed; chia oil short (6-weeks) and long (12-weeks) treatments received an HFF diet with chia oil. Plasma and hepatic biomarkers of lipid peroxidation, endogenous enzymatic and non-enzymatic antioxidant systems and antioxidant capacity were determined. HFF diet induced weight gain, oxidative stress and lipid peroxidation in plasma and liver of animals. Compared to HFF group chia seed and chia oil (12 and 6 weeks) intake increased plasma reduced thiol (GSH) levels, plasma catalase (CAT) and glutathione peroxidase (GPx) activities. In the liver glutathione reductase (GRd) activity was enhanced, while CAT and GPx activities did not change. There were no differences in plasma and liver superoxide dismutase activity among chia diets and HFF group. Chia (seed and oil) intake did not modify liver lipid peroxidation, but was able to reduce plasma thiobarbituric acid reactive substances (TBARS) and 8-isoprostane levels increased by HFF group. Plasma and hepatic antioxidant capacity values were increased in chia seed and oil groups about 35% and 47%, respectively, compared to HFF group. Chia groups presented similar antioxidant potential, regardless of treatment time. Dietary chia seed and oil reduced oxidative stress in vivo, since it improved antioxidant status and reduced lipid peroxidation in diet-induced obese rats.76666674CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP140386/2012-2 ; 300533/2013-62012/23813-

Effects of polyphenol-rich fruit extracts on diet-induced obesity in rodents: systematic review and meta-analysis

Obesity is a complex condition of high prevalence and cost to the public health system. Recent research has demonstrated the potential of natural products, such as polyphenol-rich fruit extracts, for use in the treatment of obesity. The goal of this systematic review and meta-analysis is to determine the metabolic effects of polyphenol-rich fruit extracts on diet-induced obesity (DIO) in rodents. Methods: We searched MEDLINE, EMBASE, and Web of Science databases to identify preclinical studies that assessed polyphenol-rich fruit extracts compared to placebo on DIO in rodents in December 2018. Two researchers selected the studies, extracted the data, and assessed the quality of studies. Meta-analyses of standardized mean difference (SMD) of outcomes were calculated in Stata 11, and causes of heterogeneity were assessed by meta-regression. Results: We included 14 studies in the systematic review and 13 studies with 21 matched groups in the meta-analysis. Polyphenol-rich fruit extracts reduced the total body weight gain (SMD =-1.48; confidence interval:-1.95,-1.01), energy intake (SMD =-0.42;-0.67,-0.17), visceral adipose tissue (SMD =-0.96;-1.25,-0.66), triglycerides (SMD =-1.00;-1.39,-0.62), cholesterol (SMD =-1.18,-1.66,-0.69), LDL-c (SMD =-1.15;-1.65,-0.65), fasting glucose (SMD =-1.05;-1.65,-0.46), and fasting insulin (SMD =-1.40;-1.80,-1.00) when compared to vehicle. Conclusion: Polyphenol-rich fruit extract had positive effects on weight gain, dyslipidaemia, insulin resistance at different doses, and fruit source in male mice.253234843497CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP403328/2016-0 ; 301108/2016-1Sem informação2018/11069-5 ; 2015/50333-

Inclusion of Hass avocado-oil improves postprandial metabolic responses to a hypercaloric-hyperlipidic meal in overweight subjects

In recent years, the increase of the global incidence of obesity and obesity-related disorders has been associated with metabolic imbalance and low grade inflammation. Fat-rich meals and diets contribute importantly to those alterations. The aim of this work was to evaluate the impact of exchanging butter by Hass avocado-oil on postprandial metabolic parameters in healthy overweight volunteers consuming a hypercaloric-hyperlipidic breakfast. Thirteen healthy volunteers consumed a control meal (CM) consisting of: butter, eggs, bacon, wheat bread, potatoes and iced sugar, or a test meal (TM), where butter was totally replaced by Hass avocado-oil. Blood biomarkers were measured postprandially during 240 min. Participants were 65.1 ± 5.3 years old, body mass index 28.1 ± 1.8 kg/m2 and fasting glycemia ≤6.1 mmol/L. The consumption of CM or TM resulted in similar high-density lipoprotein and glucagon-like peptide-1 (GLP-1) responses, but TM improved postprandial profiles of insulin, glycemia, total cholesterol, low-density lipoprotein, triacylglycerols, C-reactive protein and interleukin-6 (P < 0.05). The study shows potential of Hass avocado-oil for counteracting the negative impact of a high fat and hypercaloric breakfast meal on important biomarkers related to cardiometabolic health.38349354CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP301108/2016-12015/13320-

Effect of bilberries, lingonberries and cinnamon on cardiometabolic risk-associated markers following a hypercaloric-hyperlipidic breakfast

Different dietary sources of bioactives may reduce cardiometabolic risk. This work investigated the feasibility of using a high-fat/high-caloric meal challenge as a tool for assessing the cardiometabolic protective effects of three bioactive-rich foods. Thirteen healthy, but overweight volunteers (65.1 ± 5.3 years old, fasting glycemia, ≤6.1 mmol L−1) received a high-fat reference breakfast meal (RM; 910 kcal, 50 E% fat) or three isocaloric test meals incorporating cinnamon (CM, 3 g), bilberry (BM, 100 g) or lingonberry (LM, 100 g) to the high-fat breakfast. Circulating biomarkers associated with cardiometabolic risk were measured postprandially for 4 h. LM and BM attenuated the elevation of cholesterolemia caused by RM. BM also modulated the triacylglyceride response. CM reduced glycemic response, postprandial endotoxemia and C-reactive protein, but increased cholesterolemic response. These postprandial response-modulating actions of bilberries, lingonberries and cinnamon suggest the high-fat/high caloric meal model as a tool for screening protective effects of bioactive-rich foods.60CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES301108/2016-1 ; 403328/2016-0 ; 205356/2014-1Sem informaçã

Microalgae carotenoids intake: Influence on cholesterol levels, lipid peroxidation and antioxidant enzymes

The objective of this study was to evaluate the effect of carotenoids intake of Scenedesmus obliquus, on lipid peroxidation, the endogenous antioxidant defense system as well as the serum lipid profile in vivo. Male mice were divided into control groups and supplemented with different doses of microalgae carotenoids: 0.25 (MC1) and 2.5 (MC2) mg·kg−1 bodyweight. The lipid profile (total cholesterol, triglycerides, low and high-density lipoprotein) and markers of hepatic toxicity were determined in serum samples. Antioxidant enzymes and thiobarbituric acid reactive substances were determined in the heart, liver, kidneys, and spleen. Both doses used to treat the animals did not show adverse effects by markers of hepatic toxicity. MC1 did not cause significant changes in the serum lipid profile. In contrast, it created a significant reduction in lipid peroxidation of the spleen (46%) as well as an increase in the GR in the heart (40%) and GPx in the kidneys (79%) activity. The MC2 treatment also increased GR (49%) in the heart and GPx (243%) in the heart and kidneys (58%) activity, however, significantly increased levels of lipid peroxidation in the liver (160%) as well as serum triglycerides (60%). According to results, it is suggested that the consumption of S. obliquus carotenoids at the MC1 dose was safe to the animals and could be explored as an alternative to improve the activity of antioxidant enzymes and reduce lipid peroxidation128CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES312564/2015-5; 301108/2016-1sem informaçãoThis study was financially supported by the MCTI/CNPq/MEC/CAPES/PROCAD (Brazil) (312564/2015-5), PNPD/CAPES (001) and CNPq (301108/2016-1

Antioxidant and anti-diabetic potential of Passiflora alata Curtis aqueous leaves extract in type 1 diabetes mellitus (NOD-mice)

FAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOLeaves of Passiflora alata Curtis were characterized for their antioxidant capacity. Antioxidant analyses of DPPH, FRAP, ABTS, ORAC and phenolic compounds were made in three different extracts: aqueous, methanol/acetone and ethanol. Aqueous extract was found to be the best solvent for recovery of phenolic compounds and antioxidant activity, when compared with methanol/acetone and ethanol. To study the anti-inflammatory properties of this extract in experimental type 1 diabetes, NOD mice were divided into two groups: the P. alata group, treated with aqueous extract of P. alata Curtis, and a non-treated control group, followed by diabetes expression analysis. The consumption of aqueous extract and water ad libitum lasted 28 weeks. The treated-group presented a decrease in diabetes incidence, a low quantity of infiltrative cells in pancreatic islets and increased glutathione in the kidney and liver (p<0.05), when compared with the diabetic and non-diabetic control-groups. In conclusion, our results suggest that the consumption of aqueous extract of P. alata may be considered a good source of natural antioxidants and compounds found in its composition can act as anti-inflammatory agents, helping in the control of diabetes.Leaves of Passiflora alata Curtis were characterized for their antioxidant capacity. Antioxidant analyses of DPPH, FRAP, ABTS, ORAC and phenolic compounds were made in three different extracts: aqueous, methanol/acetone and ethanol. Aqueous extract was found to be the best solvent for recovery of phenolic compounds and antioxidant activity, when compared with methanol/acetone and ethanol. To study the anti-inflammatory properties of this extract in experimental type 1 diabetes, NOD mice were divided into two groups: the P. alata group, treated with aqueous extract of P. alata Curtis, and a non-treated control group, followed by diabetes expression analysis. The consumption of aqueous extract and water ad libitum lasted 28 weeks. The treatedgroup presented a decrease in diabetes incidence, a low quantity of infiltrative cells in pancreatic islets and increased glutathione in the kidney and liver (p b 0.05), when compared with the diabetic and non-diabetic control-groups. In conclusion, our results suggest that the consumption of aqueous extract of P. alata may be considered a good source of natural antioxidants and compounds found in its composition can act as anti-inflammatory agents, helping in the control of diabetes181106115FAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOFAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO2011/06559-

Chia (Salvia hispanica L.) enhances HSP, PGC-1α expressions and improves glucose tolerance in diet-induced obese rats

The aim of this study was to investigate the effects of chia seed and chia oil on heat shock protein (HSP) and related parameters in diet-induced obese rats. Methods: Animals were divided in six groups: control, high-fat and high-fructose diet (HFF), and HFF with chia seed or chia oil in short (6-wk) and long (12-wk) treatments. Plasma indicators of glucose tolerance and liver damage, skeletal muscle expression of antioxidant enzymes, and proteins controlling oxidative energy metabolism were determined. The limit of significance was set at P < 0.05. Results: The HFF diet induced glucose intolerance, insulin resistance, oxidative stress, and altered parameters related to obesity complications. The consumption of chia seed or chia oil did not reduce body weight gain or abdominal fat accumulation. However, chia seed and chia oil in both treatments improved glucose and insulin tolerance. Chia oil in both treatments induced expression of HSP70 and HSP25 in skeletal muscle. Short treatment with chia seed increased expression of HSP70, but not HSP25. Chia oil in both treatments restored superoxide dismutase and glutathione peroxidase expression. Extended treatment with chia seed and short treatment with chia oil restored peroxisome proliferator-activated receptor-γ coactivator-1α (PGC-1α) expression. Conclusion: Chia oil restored the antioxidant system and induced the expression of a higher number of proteins than chia seed. The present study demonstrated new properties and molecular mechanisms associated with the beneficial effects of chia seed and chia oil consumption in diet-induced obese rats.315740748CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP140386/2012-2 ; 300533/2013-62013/02862-0 ; 2012/23813-4 ; 2011/13035-

Brazilian berry extract (Myrciaria jaboticaba): a promising therapy to minimize prostatic inflammation and oxidative stress

Brazilian berry is a fruit popularly known as “Jaboticaba,” rich in bioactive compounds with antioxidant and anti-inflammatory properties. Senescence and overweight are increasing worldwide and are considered risk factors to prostatic pathogenesis mainly due to oxidative and inflammatory processes induction. Thus, this study aimed to evaluate the effect of two increasing doses of the patented jaboticaba peel extract (PJE) on oxidative-stress and inflammation in the prostate of aging or high-fat-fed aging mice. Methods: PJE and/or high-fat diet (HFD) treatments started with 11-month-old mice and lasted 60 days. The levels or the immunoexpression of different inflammatory (nuclear factor κB [NFκB], CD3+, cyclooxygenase 2 [COX-2], toll-like receptor 4 [TLR4], phosphorylated signal transducers and activators of transcription 3 [pSTAT-3], tumor necrosis factor α [TNF-α], interleukin 6 [IL-6], and IL-1β) and oxidative-stress (catalase, superoxide dismutase 2 [SOD2], glutathione reductase [GSR], reduced glutathione, and glutathione peroxidase 3 [GPx3]) related molecules were analyzed by western-blotting, immunohistochemistry, and enzyme-linked immunosorbent assays. Results: Both PJE doses reduced the levels of oxidative-stress-related molecules (GPx3, GSR, catalase), lipid peroxidation (4-hydroxynonenal), inflammatory mediators (COX-2, TNF-α, and pSTAT-3) and CD3+ T cells number, which were associated with the maintenance of the glandular morphological integrity in aging and HFD-fed-aging mice. Nevertheless, only the high PJE dose reduced the NFκB and TLR4 levels in aging mice; and SOD2, IL-6, and IL-1β levels in HFD-aging mice. Aging itself promoted an oxidative inflammation in the prostate, interfering in the levels of the different oxidative-stress, lipid peroxidation, and inflammatory mediators evaluated, in association with high incidence of prostate epithelial and stromal damages. The HFD intake intensified aging alterations, showing an unfavorable prostatic microenvironment prone to oxidative and inflammatory damages. Conclusions: PJE exerted a dose-dependent effect controlling inflammation and oxidative-stress in aging and HFD-fed aging mice prostate. This fact contributed to prostate microenvironment balance recovery, preserving the tissue architecture of this gland. Thus, the PJE emerges as a potential therapy to prevent inflammation and oxidative stress in the prostate.8011859871CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP141766/2015‐8 ; 301108/2016‐1 ; 403328/2016‐0Sem informação2015/25714‐1 ; 2015/50333‐1 ; 2018/11069‐