IMPACT OF PHYSICAL TREATMENTS ON STABILITY AND RADICAL SCAVENGING CAPACITY OF ANTHOCYANIDINS

Objective: The aim of the study was to evaluate the chemical stability and antioxidant ability of selected anthocyanidin (ACN) upon various commonly used physical treatments.Methods: Pure compounds of representative ACNs (cyanidin, peonidin) were subjected to microwave, heat, and sonication treatments followed by analyzing the rate of degradation by LC-MS. The changes in the antioxidant ability of ACNs were also assessed by DPPH and ABTS assay.Results: All the tested treatment strategies accelerated the degradation and diminished the antioxidant capacity of pure ACN, more specifically heat exposure cause ~ 90% of degradation and ~3 fold reduction in antioxidant capacity. About 91.34% and 87.73% of cyanidin and peonidin degradation were documented after heat treatment, respectively. Relatively sonication has not accelerated the ACN debasement, but significant level of degradation (p<0.05) was observed.Conclusion: The study results suggested that the maximum concern is required for the selection of the method of the degerming process during the production of precious formulations. This study revealed that microwave and sonication processes are better than dry heat based aseptic methods for pure ACNs based product, especially in pharmaceuticals with respect to the stability and bioactivity of ACN.Â

ANTHOCYANIN PROFILE AND ITS ANTIOXIDANT ACTIVITY OF WIDELY USED FRUITS, VEGETABLES, AND FLOWERS IN THAILAND

Objective: Anthocyanins are the water-soluble pigments most commonly present in flowers, fruits, and vegetables. Anthocyanins have been reported for is antioxidant, anti-inflammatory, antibacterial properties and other health benefits in human. This study was performed to extract and determine the anthocyanin and to access the antioxidant properties of the most commonly used fruits, vegetables and flowers in Thailand.Methods: Extraction of anthocyanin and its aglycones from the selected samples and determination of anthocyanin and anthocyanidins using reversed-phase HPLC analysis. Determination of total antioxidant ability using ABTS, DPPH and FRAP assay.Results: Maximum distribution of tested anthocyanin and anthocyanidin contents was observed in the extracts of Jambolan plum, Ceylon Spinach, Purple Sweet Potato, Purple Lettuce followed by common plum and Red dragon fruit. The extracts of Ma-Kiang, Purple Eggplant, Red Grape, and Purple Lettuce showed the maximum amount of cyanidin 3-glucoside, delphinidin 3-glucoside, peonidin 3-glucoside, and malvidin 3-glucoside, respectively. Likewise, the maximum concentration of cyanidin, delphinidin, peonidin, and malvidin were found in Common plum, Red Khae, Red Cabbage, and Purple Lettuce, respectively. Ma-Kiang extract exhibited the maximum antioxidant activity followed by Red Cabbage, Common Plum, and Purple Eggplant extract compared to the other extracts.Conclusion: The present study, primarily profiled the anthocyanin content of selected fruits, vegetables, and flowers. Among the tested samples, Ma-Kiang extract showed the high cyanidin 3-glucoside content and antioxidant activity. Further, detailed study on the content of anthocyanins at different climate and geographical conditions and other factors are necessary to develop nutraceutical or cosmetic product with a functional ingredient.Keywords: Anthocyanin, Anthocyanidin, Antioxidant activity

MOLECULAR, HISTOLOGICAL, AND ANTI-OXIDANT EVALUATION OF COLITIS INDUCTION IN RATS BY DIFFERENT CONCENTRATION OF DEXTRAN SODIUM SULFATE (5 KDA)

Objective:  The current study was conceived and performed to assess the pathophysiological, histological, and molecular manipulations of dextran sodium sulphate (DSS; MW: 5,000 Da) intervention in the rat and determined the changes in the antioxidant capacity of host and representative antioxidant enzymes.Methods: Wistar rats were fed with two different concentrations (3 and 5%) of DSS for seven days and caged for another seven days. Then colon and serum samples were collected, and colitis induction was assessed by histochemical examination. The level of antioxidant enzymes were determined by spectroscopy methods, and gene regulations were evaluated by qPCR.Results: The body mass of rat was gradually reduced to DSS intervention compared to naive control. The statistically significant level of reduction in the colon length has been recorded in DSS-treated rats (3% DSS-treated: 14.33±0.53 cm; 5% DSS-treated: 13.73±0.53 cm) compared to control (Control: 17.41±0.54 cm). The total histological scores of different study groups suggested that DSS causes the significant level of damages in rat colon. The antioxidant capacity of the host was significantly reduced in terms of trolox equivalence. About three-fold higher the amount of malondialdehyde was recorded in 5% DSS-treated group compared to control. The content of antioxidant enzymes were drastically reduced (1.4-2.7 fold) upon DSS exposure than naïve control. The expression of selected inflammatory markers (IL-6, TNF-α, and iNOS) was up-regulated in DSS-exposed groups.Conclusion: The current study clearly indicated that DSS altered the expression of selected inflammatory genes, antioxidant capacity, and scavenging enzymes in such a way that it facilitates the development of colitis in Wistar rat and the study provides the necessary information the experimental designing to explore the ability of any active principle against colitis using DSS (5 KDa) induced colitis rat model.Â

Assessment of changes in the content of anthocyanins, phenolic acids, and antioxidant property of Saccharomyces cerevisiae mediated fermented black rice bran

Abstract Studies on phytochemical properties and bioactivities of rice bran revealed the wealth of natural complex antioxidant compounds. The composition and the properties of the rice bran get altered after fermentation by several microbes. This study was designed to optimize the black rice bran fermentation conditions for the total anthocyanin (ACN) content, total antioxidant properties, and relative activity of β-glucosidase (BGS) by Saccharomyces cerevisiae. The Box–Behnken design and response surface methodology was employed to achieve the maximum response in fermentation. The kinetic analysis of HPLC based phytochemical determination and bioconversion of ACN, and in vitro antioxidant assays were performed during fermentation. The optimum pH, temperature and NaCl concentration to achieve maximum ACN content, antioxidant capacity, and BGS activity were pH 4.0, 40 °C, and 0.5%, respectively. Bioconversion of cyanidin-3-glucoside and peonidin-3-glucoside to cyanidin and peonidin was recorded at a significant level, respectively. The maximum activity of BGS on rice bran was noticed at 24 h of fermentation. The results suggested that phytochemical content was not changed significantly, whereas the antioxidant properties of rice bran were slightly enhanced after 24 h of fermentation. Additional detailed in vivo evaluation is required to explain the impact of submerged fermentation on the bioactivity of rice bran

Extraction of β-glucan from Saccharomyces cerevisiae: Comparison of different extraction methods and in vivo assessment of immunomodulatory effect in mice

Abstract Beta-glucan (BG) is a conserved cell wall components of bacteria, fungi, and yeast. BG is an immunomodulator and stimulates the host immune system. This study was performed to screen Saccharomyces cerevisiae strain with high BG, extraction of BG using different chemical extraction methods, composition analysis of BG, and evaluation of the immunomodulatory effect of high-quality BG using mice model. Ten yeast strains were screened for high BG content using total glucan extraction kit and were subjected to FT-IR analysis. The kit based extraction revealed that HII31 showed a high content of total glucan and BG. HII31 cells were subjected to four different acid/base extractions, which indicated that combination of a strong base (NaOH) and weak acid (CH3COOH) extraction recovered high BG and a high ratio of polysaccharide, protein, and lipid. Further, the immunomodulatory effect of the selected BG was evaluated using mice, which suggested that low dose of HII31-BG induces the expression of selected pro-inflammatory (IL-17, IFN-γ) and anti-inflammatory cytokine (IL-10) significantly, whereas relatively high dose was required to alter the IL-6 and TGF-β expression. Overall, the present study revealed that BG extracted from HII31 cells alters the expression of studied cytokines, which can be used as a potent immunomodulator in pharmaceutical products

Extraction of β-glucan from Saccharomyces cerevisiae: Comparison of different extraction methods and in vivo assessment of immunomodulatory effect in mice

Abstract Beta-glucan (BG) is a conserved cell wall components of bacteria, fungi, and yeast. BG is an immunomodulator and stimulates the host immune system. This study was performed to screen Saccharomyces cerevisiae strain with high BG, extraction of BG using different chemical extraction methods, composition analysis of BG, and evaluation of the immunomodulatory effect of high-quality BG using mice model. Ten yeast strains were screened for high BG content using total glucan extraction kit and were subjected to FT-IR analysis. The kit based extraction revealed that HII31 showed a high content of total glucan and BG. HII31 cells were subjected to four different acid/base extractions, which indicated that combination of a strong base (NaOH) and weak acid (CH3COOH) extraction recovered high BG and a high ratio of polysaccharide, protein, and lipid. Further, the immunomodulatory effect of the selected BG was evaluated using mice, which suggested that low dose of HII31-BG induces the expression of selected pro-inflammatory (IL-17, IFN-γ) and anti-inflammatory cytokine (IL-10) significantly, whereas relatively high dose was required to alter the IL-6 and TGF-β expression. Overall, the present study revealed that BG extracted from HII31 cells alters the expression of studied cytokines, which can be used as a potent immunomodulator in pharmaceutical products

DEVELOPMENT AND STABILITY EVALUATION OF VAGINAL SUPPOSITORY CONTAINING GLYCYRRHIZA GLABRA L. FOR THE TREATMENT OF CANDIDA ALBICANS INFECTION

Objective: The present study assessed the antioxidant activity, phytochemical content, and anti-Candida albicans property of ethanolic extract of Glycyrrhiza glabra L. (licorice). In addition, suppository formula (SF) was developed with licorice extract (LE), and the stability of SF was evaluated.Methods: The total phenolic and flavonoid content was measured by colorimetric methods. 2, 2′-azino-bis-3-ethylbenzthiazoline-6-sulfonic acid (ABTS), ferric reducing antioxidant power (FRAP), inhibition of lipid peroxidation (LPO), nitric oxide (NO), and superoxide (SO) radical scavenging assays were performed to evaluate antioxidant property. Antimicrobial activity was determined by plating method. The active principle was determined by high-performance liquid chromatography method.Results: The licorice sample was extracted with 95% ethanol, and 26.91±1.35% of yield was observed. The LE contains phenolic acids (167.70±3.18 mg gallic acid equivalent/g extract), flavonoids (162.53±9.95 mg quercetin equivalent/g extract), and glabridin (3.90±0.05 mg/g extract). LE exhibited the scavenging activity in terms of 810.53±25.37 μM of Trolox equivalent/mg of extract, 165.04±5.10 μM of FeSO4 equivalent/mg of extract, and 3750.35±1.25, 68.25±0.07, and 511±0.80 μM of Trolox equivalent/mg of extract in ABTS, FRAP, LPO, NO, and SO assays, respectively. About ≥62.50, ≥125, and ≥250 μg/mL of LE was recorded as minimal inhibitory concentration against C. albicans, Lactobacillus casei, and Lactobacillus acidophilus, respectively. The SF was formulated and the stability was evaluated. The activity and color of SFs did not differ on storage. Moreover, no spot formation was observed.Conclusion: The SF with LE could be the safe therapeutic strategy for the treatment of candida infection in vaginal region

Physicochemical and antioxidative properties of black, brown and red rice varieties of northern Thailand

Rice, the seed of Oryza species, is the major cereal crop in most of the developing countries. Nearly 95% of global rice production is done in Asian countries, and about half of the world’s population consumes it. Some speciality rices are not commonly consumed. Colored rice is one of such variety. In these varieties, high amounts of anthocyanin pigment are deposited in the rice coat to form its black (also known as purple), brown and red colors. Minimum studies are there to explain the properties of these rice varieties of Thailand. Thus, the current study was aimed to assess the physicochemical and antioxidative properties of three rice varieties (Chiang Mai Black rice, Mali Red rice and Suphanburi-1 Brown rice) of different cultivars of northern Thailand. Rice bran extracts of these three cultivars were prepared with different solvents (polar and non-polar) for the evaluation of total phytochemical content and anti-oxidant free-radical-scavenging properties. Chiang Mai Black rice contained higher concentration of phenolic acid, flavonoids, and anthocyanins (Cyanidin 3-glucoside, peonidin 3-glucoside, cyanidin chloride). Chiang Mai Black rice is richer in free-radical-scavenging compounds and activities than the other tested varieties. Polar extractions of rice bran are high in anti-oxidative compounds and activities than non-polar extractions