No abstract

Citrus EOs and Flavonoids are widely recognized for their beneficial effects in possessing many biological activities, such as antioxidant, antimicrobial and cytotoxic properties, also using in food additives and in the cosmetic industry. The aim of this work is to produce nanoparticles of hesperidin and citrus EO extracted from waste orange peels, and study its biological impact compared to native products (hesperidin and citrus EO) as antioxidant, antimicrobial and cytotoxic. Obtained products (nanoformulation) are characterized by zeta potential, electron scanning microscopy, spectrophotometric method and color analysis. The final products (nano-formulation) were examined as antioxidant agent by two assays (DPPH and ABTS analysis). The antioxidant activity of nano hesperidin and citrus EO was evaluated and compared with none formulated. Nanoparticles of hesperidin and citrus EO have a great potential in DNA damage prevention compared to their respective controls which were examined by DNA damage assay induced by oxidative stress protection analysis. The in vitro cytotoxic activity of nano formulated hesperidin and citrus EO, towards (three cancerous cell lines, including: breast (MCF-7), colorectal (HCT-116) and liver (HepG2), and two non-cancerous control cell lines (fibroblast BJ-1and MCF-12F) compared with native product (citrus EO and hesperidin) were examined using MTT assay. The hesperidin and citrus EO NPs showed a positive effect on the inhibition of the proliferation of all tested cancer cell line. The antimicrobial activity of hesperidin, citrus EO and their nano formulation form was evaluated using well diffusion assay. The nano formulation form of hesperidin and citrus EO showed to improve the antimicrobial activity. These findings showed that nano-hesperidin and nano -citrus EOs play an important role as antioxidant, antimicrobial and cytotoxic agent's effects. These effects might be used for clinical trials and can represent driving formulation for novel chemotherapeutic agents and in food industry. Further studies about the therapeutic effects of nanohesperidin and citrus EO extracted from Egyptian orange peel are requested

Isoberlinia doka is dominant species in the savannah of West Africa belonging to the family Fabaceae. It is used in traditional medicine for treatment of muscular -skeletal system disorders, Jaundice scorpion bites, Convulsion, diabetes, ulcer, wounds and cough. The objectives of the study are to determine the pharmacognostic and antioxidant activity of Isoberlinia doka leaves. Three extracts of Isoberlinia doka leaves were obtained by sequential maceration using n-hexane, ethyl acetate and methanol The extracts were screened qualitatively for the presence of saponins, carbohydrates, tannins, flavonoids, cardiac glycosides, anthraquinones and alkaloids using standard procedures. Thin layer chromatography was carried out to determine the separation profile of various extracts. Antioxidant activity of the methanol leaves extract of Isoberlinia doka was determined using 1, 1-diphenyl-2-picrylhydrazyl radical (DPPH) Assay. The phytochemical screening of the methanol extract revealed the presence of alkaloids, flavonoids, tannins, cardiac glycosides and saponins. The methanol leaves extract of Isoberlinia doka demonstrated strong radical scavenging activity and reducing power ability with concentration dependent responses. The results of this study suggest that the plant can serve as a good source of antioxidant which can aid in the management of diseases associated with oxidative stress.

Nanoparticles are the basic essential element of nanotechnology and it exhibits characteristic features based on their properties such as size, morphology and other size dependent properties. Their applications on agriculture, food and medicine are widely used nowadays. Agro-waste materials cause a global environmental problem worldwide. Maximizing the benefits of such waste material is a very important issue. The present investigation aimed to use nano-formulation techniques by using polyethylene glycol 8000 to produce nano-lycopene extracted from tomato waste (pomace) as well as evaluation the antioxidant, antimicrobial and anticancer activity of produced lycopene-NPs. The results of antioxidant activity using ABTS and DPPH assays revealed that nano-formulation of Lycopene increases the scavenging activity compared with lycopene. Also, both lycopene and lycopene-NPs showed antibacterial activity against all tested bacteria and antifungal activity against tested fungal species. MIC for lycopene and lycopene-NPs was determined. DNA damage induced by oxidative stress protection analysis indicated that lycopene-NPs has a great potential in DNA damage prevention compared to their respective controls. The MTT assay exhibited cytotoxic activity against three cancerous cell lines, MCF-7, HCT-116 and HepG2. As well as lycopene-NPs biosafety was tested against normal cell lines (BJ-1 and MCF-12F) compared to lycopene.

The study was designed to investigate the effect of lycopene, hesperidin, and essential oil and their nano-formulation form in high-fat diet (HFD) -induced obese Wistar rats. To achieve this, a total of ninety adult Wistar male rats were used. The animals were made obese by feeding rats' high-fat diet (HFD, cholesterol, and bile acid). Cholesterol dose, 0.3 mL olive oil containing 30 mg cholesterol/ 1 kg body weight was orally administrated (five times per week ) for 8 consecutive weeks. Obesity was confirmed by the percentages of body weight gain. Animals were divided into negative control groups (normal rats received normal diet) and positive control groups (normal rats received HFD ) and treatment groups (obese rats received different samples) of five animals each. Dose of lycopene and its nanoparticles 50 mg/kg b. wt., hesperidin, essential oil, and their nano-formulation form (100 mg/kg b.wt). All samples and standard drug (orlistat 12 mg/kg b. wt.) were orally administered once daily for four weeks. At the end of experiement, all animal groups were sacrificed and blood samples were collected. Different parameters including total cholesterol, triglycride, HDL-cholesterol, total lipid, alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), creatinene and urea were determined in the serum. The liver tissue was excised for the determination of hepatic antioxidant biomarkers (catalase and GSH) and oxidative stress (lipid peroxide). Histopathological examination of liver tissue of obese rats showed diffuse fatty liver, circumscribed hepatic vacuoles with prepheralnucleous. However, obese rats-treated with all different samples declaring amelioration in all the measured parameters. The results obtained illustrated that the nano-formulation form are more effective than a native form of lycopene, hesperidin, and essential oil. Besides, the lycopene and its nanoparticles were more effective than hesperidin, essential oil, and their nano-formulation forms. So, it could be concluded that , oral supplementation with lycopene, hesperidin, essential oil, and their relative nano-formulation forms can treat hepatic dysfunction in obese rats.