Phenolic-Rich Extract from Almond (Prunus dulcis) Hulls Improves Lipid Metabolism in Triton WR-1339 and High-Fat Diet-Induced Hyperlipidemic Mice and Prevents Lipoprotein Oxidation: A Comparison with Fenofibrate and Butylated Hydroxyanisole

Antihyperlipidemic effect and GC-MS analysis of phytoconstituents from Laurus nobilis essential oil in rat

This study aimed to evaluate the effect of Laurus nobilis (L. nobilis) essential oil (EOs) (80 mg/kg) on Triton WR-1339-induced dyslipidemia in Wistar rats. The effect of L. nobilis essential oil (80 mg/kg) on lipid and lipoprotein profile was examined on Triton WR-1339-induced dyslipidemia in rats. Furthermore, the phytochemical evaluation was performed by GC-MS. In Addition, the acute toxicity of this EO was evaluated at a dose of 2 g/kg. The results revealed that the main constituents of L. nobilis EO were 1,8-cineole (39.5%), linalool (13.09%), and a-terpineol (11.55%). Furthermore, the EO did not cause any signs of toxicity or mortality, and the acute lethal dose 50 (LD50) was estimated to be higher than 2 g/kg. L. nobilis EO ameliorated lipid parameters and atherogenic indices. In conclusion, the study demonstrates that L. nobilis essential oils possess antidyslipidemic activity in acute model of hyperlipidaemia.

The Nephroprotective Potential of Brassica nigra Sprout Hydroalcoholic Extract against Carbon Tetrachloride-Induced Renal Toxicity in Rats

The nephroprotective potential of the Brassica nigra sprout (BNS) hydroalcoholic extract against carbon tetrachloride (CCl4)-induced renal toxicity in rats was the object of this study. B. nigra sprouts were prepared in the lab to monitor the bio-changes in bioactive compounds during the sprouting for up to 7 days at 17 ± 1 °C and 90% relative humidity. Subsequently, 6-day sprouts of B. nigra were selected according to their phenolics and antioxidant activity, extracted, and examined for their nephroprotective and antioxidative stress potential at 250 and 500 mg sprout extracts kg-1 bw, in vivo. Weight gain, organ weight, lipid profile, atherogenic index, kidney functions, and oxidative stress biomarkers were assessed. The results indicated that the most proficient treatment for weight gain improvement was BNS extract at 500 mg kg-1. BNS at 250 mg kg-1 was remarked as the lowest weight gain enhancer compared to the NR group. A significant increase in TG, TC, LDL-c, and VLDL-c levels in the rats with CCl4-induced renal toxicity, and a significant decrease in HDL level, was noted. The administration of the BNS extract at 250 and 500 mg kg-1 considerably attenuated TG, TC, LDL-c, and VLDL-c levels, compared to the NR group. The most efficient treatment for improving the lipid profile was the BNS extract at 500 mg kg-1, even better than 250 mg kg-1. Administrating the BNS extract substantially attenuated the alterations in the creatinine, urea, and BUN caused by the CCl4 injection. The most efficient improvement was markedly recorded with the BNS extract at 500 mg kg-1, compared to the NR group. The rats treated with the BNS extract showed significant enhancement in GSH, CAT, and SOD activities and a considerable reduction in MDA levels. Administering the BNS extract at 250 and 500 mg kg-1 can efficiently reverse CCl4 inhibition of antioxidant enzyme activities, significantly increase GSH, CAT, and SOD, and decrease the MDA levels dose-dependently. The BNS extract at 250 and 500 mg kg-1 exhibits nephroprotection and antioxidative stress in a dose-dependent matter. The total nephroprotection % was recorded at 65.18% and 99.21% for rats treated with 250 and 500 mg kg-1, respectively. These findings could prove and potentiate the nephroprotective activities of the BNS extract in the range of the given doses. Further clinical studies are highly recommended for confirming the nephroprotection efficiency of the B. nigra sprout.

In vivo Antihyperglycemic and Antidyslipidemic Effects of L-Tartaric Acid

AIMS

The aim of the study was to investigate the antihyperglycemic effect of L-Tartaric acid.

BACKGROUND

L-Tartaric acid is a natural product with possible beneficial effects on health.

OBJECTIVE

The goal of this work was to evaluate the antihyperglycemic and antidyslipidemic effects of L-Tartaric acid (L-TA) in rats.

MATERIALS AND METHODS

In the first model, the effects of L-TA (10 and 40 mg/kg) on diabetes conditions induced by streptozotocin (STZ) in rats were investigated. In the second model, the effects of L-TA (40 and 80 mg/kg) on dyslipidemia induced by tyloxapol (Triton WR-1339) in rats were assessed.

RESULTS

L-TA (40 mg/kg) had improved all studied parameters. L-TA at 40 mg/kg was able to significantly reduce glycaemia, improve oral glucose tolerance (OGT), increase glycogen content in liver and extensor digitorum longus (EDL) muscle, and ameliorate the lipidic profile and atherogenic indices in STZ-diabetic rats.

CONCLUSION

L-Tartaric acid was able to exhibit antihyperglycemic and antidyslipidemic effects in STZ-induced diabetic rats. Moreover, the antidyslipidemic effect of L-Tartaric acid was confirmed in tyloxapol-induced hyperlipidemic rats.

Hypolipidemic Effect of Hemp Seed Oil from the Northern Morocco Endemic Beldiya Ecotype in a Mice Model: Comparison with Fenofibrate Hypolipidemic Drugs

Introduction. Cannabis sativa is a source of oil seeds for pharmaceutical, cosmetic, and food uses. Objective. The aim of this study is to evaluate the hypolipidemic effect of hemp seed oil (HSO) obtained from a local ecotype called “Beldiya.” Methods. The extraction of HSO was carried out by cold press method. Then, the fatty acid and tocopherol composition was analyzed, respectively, by GC-FID and HPLC. The hypolipidemic activity of HSO at a dose of 3.5 and 7 mg/kg body weight was evaluated in Triton WR-1339-induced hyperlipidemic mice by measuring plasma cholesterol (total lipid, HDL, and LDL), plasma triglycerides, and atherogenic index using enzymatic methods. Fenofibrate was used as a standard hypolipidemic drug at a dose of 3.5 mg/kg body weight. Results. Analyzed HSO shows a high unsaturated fatty acids’ content with the dominance of linoleic acid (48.85%), oleic acid (21.82%), as well as α- and γ-linolenic acid (14.72%). The result demonstrates that this typical vegetable oil contains a high concentration of γ-tocopherol (456 mg·kg−1 oil). Furthermore, the administration of HSO decreases plasma total cholesterol, triglycerides, and LDL-cholesterol while increases HDL-cholesterol. Consequently, the HSO reduces the atherogenic index and LDL/HDL ratio. The hypolipidemic effect of fenofibrate is relatively more marked comparatively to that of HSO especially concerning total cholesterol and its LDL fraction. Conclusions. The local ecotype HSO has an interesting effect on plasma lipid parameters and might be beneficial for the treatment of hyperlipidemia and prevention of atherosclerosis.

Dietary Intake of Hydrolyzable Tannins and Condensed Tannins to Regulate Lipid Metabolism

Lipid metabolism disorder is a multifactor issue, which contributes to several serious health consequences, such as obesity, hyperlipidemia, atherosclerosis diabetes, non-alcoholic fatty liver etc. Tannins, applied as natural derived plant, are commonly used in the study of lipid metabolism disease with excellent safety and effectiveness, while producing less toxic and side effects. Meanwhile, recognition of the significance of dietary tannins in lipid metabolism disease prevention has increased. As suggested by existing evidence, dietary tannins can reduce lipid accumulation, block adipocyte differentiation, enhance antioxidant capacity, increase the content of short-chain fatty acids, and lower blood lipid levels, thus alleviating lipid metabolism disorder. This study is purposed to sum up and analyze plenty of documents on tannins, so as to provide the information required to assess the lipid metabolism of tannins.

Antihyperlipidemic and Antioxidant Activities of Flavonoid-Rich Extract of Ziziphus lotus (L.) Lam. Fruits

Ziziphus lotus (L.) Lam. (Z. lotus) is a medicinal plant species that is widely distributed throughout the Mediterranean basin. Moroccans traditionally use it to treat many illnesses thanks to its beneficial medicinal properties. The purpose of this study is to assess the anti-hyperlipidemic and antioxidant activities of a flavonoid-rich aqueous extract of Z. lotus fruits (ZLF). The 2-2-diphenyl-1-picrylhydrazyl (DPPH) scavenging assay and the β-carotene bleaching test were used to determine the antioxidant activity of ZLF. The anti-hyperlipidemic effect of the aqueous extract of ZLF (200 and 400 mg/kg) was evaluated in albino mice exposed to the chronic high-fat diet, based on lipid profile, blood sugar, and changes in growth performance. The results showed that the aqueous extract of ZLF rich in flavonoids (2242.89 ± 25 µg QE (quercitin equivalent)/mg), and has a considerable antioxidant power against DPPH radicals (IC50 = 116 ± 0.02 µg/mL) and β-carotene oxidation. The aqueous extract of ZLF also showed a significant anti-hyperlipidemic effect by improving abnormal changes in lipid profile and blood glucose levels in albino mice exposed to a chronic high-fat diet. Our findings suggest that the anti-hyperlipidemic activities of ZLF aqueous extract are correlated with its flavonoid content and antioxidant activity. Therefore, the aqueous extract of ZLF could be an essential therapeutic candidate for hyperlipidemia patients, thanks to its richness in bioactive molecules.