Recovery of Polyphenols Using Pressurized Hot Water Extraction (PHWE) from Black Rosehip Followed by Encapsulation for Increased Bioaccessibility and Antioxidant Activity

In this work, pressurized hot water extraction (PHWE) of hydrophilic polyphenols from black rosehip fruit was maximized using response surface methodology for simultaneous optimization in terms of extraction yield, total antioxidant capacity, total (poly)phenols, catechin, total monomeric anthocyanins, and cyanidin-3-O-glucoside. Extraction parameters, including temperature (X1: 40–80 °C) and the solvent-to-solid ratio (X2: 10–40 mL/g), were investigated as independent variables. Experimentally obtained values were fitted to a second-order polynomial model, and optimal conditions were determined using multiple regression analysis and analysis of variance. The black rosehip extract (BRE) obtained at optimized PHWE conditions was further encapsulated in biopolymer-coated liposomes and spray dried to enhance its processing and digestive stability. After reconstitution, the fabricated particles had an average size of 247–380 nm and a zeta-potential of 15–45 mV. Moreover, encapsulation provided remarkable protection of the phenolics under in vitro gastrointestinal digestion conditions, resulting in up to a 5.6-fold more phenolics in the bioaccessible fraction, which also had 2.9–8.6-fold higher antioxidant activity compared to the nonencapsulated BRE. In conclusion, PHWE in combination with a biopolymer coating is a potent method for the production of stable and safe edible natural extracts for the delivery of (poly)phenolic compounds in food and dietary supplements.

Identification of the functional food potency of çalkama: A traditional recipe with edible Mediterranean wild greens from Turkish cuisine

BACKGROUND: The phytochemical contents of traditional foods are necessary to further elucidate the impacts of the Mediterranean diet on health. Çalkama is traditional food prepared by using wild green plants including chard (Beta vulgaris var.cicl), wild fennel (Foeniculum vulgare spp), common mellow (Malva sylvestris L), common poppy (Papaver rhoeas L), dock (Rumex spp), common nettle (Urtica dioica L), sow-thistle (Sonchus asper (L) Hill), common stork’s bill (Erodium circutarium (L)L Hér) and wild leek (Allium ampeloprasum L). OBJECTIVE: In this research, the antioxidant activity and the flavonoid and phenolic acid composition were separately analyzed for each plant and çalkama. METHODS: Total phenolic content, total flavonoid content and total antioxidant capacity of each plant and çalkama were measured spectrophotometric assays. Ultra-fast liquid chromatography (UFLC) was performed to detect specific flavonoid groups. RESULTS: It was detected that one portion of çalkama (100 g) contained approximately 250 mg of flavonoids. Particularly, quercetin and apigenin contributed to the main flavonoid source and chlorogenic acid was the major phenolic acid in çalkama. CONCLUSIONS: According to our findings, this food can be considered as a good phenolic and flavonoid source which protects its high antioxidant capacity through preparation and cooking processes.

Anti-proliferative, genotoxic and cytotoxic effects of phytochemicals isolated from Anatolian medicinal plants

The potential of natural products in cancer prevention and treatment has received worldwide interest in recent years from the nutraceutical and pharmaceutical industry point of view. Medicinal plants have been traditionally used as they exhibit a wide range of therapeutic effects due to their phytoconstituents which play an active role against oxidative stress-associated diseases such as cancer. They may block or suppress multistage carcinogenesis mainly through mechanistic regulation of the myriad of deregulated cellular pathways. Bioactive constituents isolated from different plants have been shown to induce reversal of drug resistance, restoration of apoptosis, inhibition of cell proliferation and stimulation of the immune system, etc. These phytochemicals such as terpenoids, flavonoids, phenolic acids, carotenoids, alkaloids, tannins, anthraquinones, and saponins can be present in any of the plant parts like root, stem, leaves, bark, seed, flower, and fruit which produce a definite physiological response in the organism. Turkish flora is a rich reservoir of wide-ranging bioactive chemicals having premium pharmacological importance. This review provides an overview of the anticancer properties of various Turkish medicinal plant species against different type of cancers via anti-proliferative, genotoxic and cytotoxic effects.

Anti-proliferative, genotoxic and cytotoxic effects of phytochemicals isolated from Anatolian medicinal plants

The potential of natural products in cancer prevention and treatment has received worldwide interest in recent years from the nutraceutical and pharmaceutical industry point of view. Medicinal plants have been traditionally used as they exhibit a wide range of therapeutic effects due to their phytoconstituents which play an active role against oxidative stress-associated diseases such as cancer. They may block or suppress multistage carcinogenesis mainly through mechanistic regulation of the myriad of deregulated cellular pathways. Bioactive constituents isolated from different plants have been shown to induce reversal of drug resistance, restoration of apoptosis, inhibition of cell proliferation and stimulation of the immune system, etc. These phytochemicals such as terpenoids, flavonoids, phenolic acids, carotenoids, alkaloids, tannins, anthraquinones, and saponins can be present in any of the plant parts like root, stem, leaves, bark, seed, flower, and fruit which produce a definite physiological response in the organism. Turkish flora is a rich reservoir of wide-ranging bioactive chemicals having premium pharmacological importance. This review provides an overview of the anticancer properties of various Turkish medicinal plant species against different type of cancers via anti-proliferative, genotoxic and cytotoxic effects.

Diet, Lifestyle and Cardiovascular Diseases: Linking Pathophysiology to Cardioprotective Effects of Natural Bioactive Compounds

Heart and blood vessels disorders comprise one of the main causes of death worldwide. Pharmacologically active natural compounds have been used as a complementary therapy in cardiovascular disease around the world in a traditional way. Dietary, natural bioactive compounds, as well as healthy lifestyles, are considered to prevent coronary artery diseases. Pre-clinical and clinical studies reported that consumption of plant-food bioactive derivatives including polyphenolic compounds, peptides, oligosaccharides, vitamins, unsaturated fatty acids possess protective effects on cardiovascular diseases. This review aims to summarize the cardiovascular risk factors, pre-clinical studies and clinical trials related to cardioprotective properties of the plant-food-derived bioactive compounds. Molecular mechanisms by the natural bioactive compounds exert their cardiovascular protective properties have also been highlighted.