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Polyphenols isolated from Acacia mearnsii bark with anti-inflammatory and carbolytic enzyme inhibitory activities

Chinese Journal of Natural Medicines 2017年第11期15卷 816-824页

作者： XIONG Jia GRACE mary H ESPOSITO Debora KOMARNYTSKY Slavko WANG Fei lila mary ann Department of Chemical Engineering Jiangsu Key Lab of Biomass-based Green Fuels and Chemicals Nanjing Forestry University Plants for Human Health Institute Department of Food Bioprocessing and Nutrition Sciences North Carolina State UniversityNorth Carolina Research Campus

The present study was designed to characterize the polyphenols isolated from Acacia mearnsii bark crude extract(B) and fractions(B1-B7) obtained by high-speed counter-current chromatography(HSCCC) and evaluate their anti-inflammatory and carbolytic enzymes(α-glucosidase and α-amylase) inhibitory activities. Fractions B4, B5, B6, B7(total phenolics 850.3, 983.0, 843.9, and 572.5 mg·g^(-1)), respectively; proanthocyanidins 75.7, 90.5, 95.0, and 44.8 mg·g^(-1)), respectively) showed significant activities against reactive oxygen species(ROS), nitric oxide(NO) production, and expression of pro-inflammatory genes interleukin-1β(IL-1β) and inducible nitric oxide synthase(iNOS) in a lipopolysaccharide(LPS)-stimulated mouse macrophage cell line RAW 264.7. All the extracts suppressed α-glucosidase and α-amylase activities, two primary enzymes responsible for carbohydrate digestion. A. mearnsii bark samples possessed significantly stronger inhibitory effects against α-glucosidase enzyme(IC_(50) of 0.4-1.4 μg·mL^(-1)) than the pharmaceutical acarbose(IC_(50) 141.8 μg·mL^(-1))). B6 and B7(IC_(50) 17.6 and 11.7 μg·mL^(-1), respectively) exhibited α-amylase inhibitory activity as efficacious as acarbose(IC_(50) 15.4 μg·mL^(-1))). Moreover, B extract, at 25 μg·mL^(-1), significantly decreased the non-mitochondrial oxidative burst that is often associated with inflammatory response in human monocytic macrophages.

关键词： acacia mearnsii Proanthocyanidins Anti-inflammatory α-Amylase α-Glucosidase

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Antioxidant Activity of Pomegranate Juice and Punicalagin

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Natural Science 2016年第6期8卷 235-246页

作者： Akram Aloqbi Ulfat Omar Marwa Yousr mary Grace mary ann lila Nazlin Howell Biology Department Faculty of Sciences and Arts-Alkamel University of Jeddah Jeddah KSA Division of Nutrition and Metabolism Faculty of Health and Medical Sciences University of Surrey Guildford Surrey UK Present Address: Biochemistry Department Faculty of Science King Abdulaziz University Jeddah KSA Plants for Human Health Institute Kannapolis NC USA

Plant polyphenols are reported to have bioactive properties, which may be used for protection against diseases. Therefore, the aim of this research was to investigate the antioxidant activities of a pomegranate tannin polyphenol compound, punicalagin and pomegranate juice. The presence of punicalagin in pomegranate husk (US) and pomegranate juice (US & UK) was compared with a punicalagin standard using high performance liquid chromatography (HPLC) and liquid chromatography-mass spectroscopy (LC-MS) which are highly sensitive and selective analytical methods for the separation and identification of phenolic compounds and anthocyanins. Antioxidant mechanisms involving DPPH radical scavenging activity, hydrogen peroxide scavenging, ferrous chelating and reducing ability were also studied on pomegranate juice and standard punicalagin. The present study shows a high degree of similarity of HPLC and LC-MS results between the punicalagin commercial standard (Sigma Aldrich) and US pomegranate husk extracted with methanol. In contrast, in the methanol juice extract obtained from US and UK, higher hydrogen peroxide scavenging activity was achieved by 0.1 mg/ml from both punicalagin and pomegranate juice when compared with butylated hydroxytoluene (BHT) or trolox (p ≤ 0.01). Punicalagin and pomegranate juice exhibited ferrous chelating ability significantly lower than Ethylenediaminetetraacetic acid. These findings confirmed that punicalagin was present in pomegranate husk compared to pomegranate juice, as measured using a punicalagin standard. The antioxidant mechanism experiments concluded that, the pomegranate juice has a significantly higher radical scavenging activity in comparison with punicalagin (p ≤ 0.01). However, punicalagin showed significant ferrous chelating activity and reducing power ability in a dose-dependent manner as compared with pomegranate juice.

关键词： HPLC LC-MS Punicalagin Radical Scavenger Ferrous Ion Chelating

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High-density linkage map construction and identification of loci regulating fruit quality traits in blueberry

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Horticulture Research 2021年第1期8卷 2391-2403页

作者： Molla F.Mengist Hamed Bostan Elisheba Young Kristine L.Kay Nicholas Gillitt James Ballington Colin D.Kay Mario G.Ferruzzi Hamid Ashrafi mary ann lila Massimo Iorizzo Plants for Human Health Institute North Carolina State UniversityKannapolisNCUSA Department of Horticultural Science North Carolina State UniversityRaleighNCUSA David H.Murdock Research Institute KannapolisNCUSA Department of Food Bioprocessing and Nutrition Sciences North Carolina State UniversityRaleighNCUSA

Fruit quality traits play a significant role in consumer preferences and consumption in blueberry(Vaccinium corymbosum L).The objectives of this study were to construct a high-density linkage map and to identify the underlying genetic basis of fruit quality traits in blueberry.A total of 287 F_(1) individuals derived from a cross between two southern highbush blueberry cultivars,‘Reveille’and‘Arlen’,were phenotyped over three years(2016–2018)for fruit quality-related traits,including titratable acidity,pH,total soluble solids,and fruit weight.A high-density linkage map was constructed using 17k single nucleotide polymorphisms *** linkage map spanned a total of 1397 cM with an average inter-loci distance of 0.08 *** quantitative trait loci interval mapping based on the hidden Markov model identified 18 loci for fruit quality traits,including seven loci for fruit weight,three loci for titratable acidity,five loci for pH,and three loci for total soluble *** of these loci were detected in more than one *** loci explained phenotypic variance ranging from 7 to 28% for titratable acidity and total soluble solid,and 8-13% for ***,the loci identified for fruit weight did not explain more than 10%of the phenotypic *** also reported the association between fruit quality traits and metabolites detected by Proton nuclear magnetic resonance analysis directly responsible for these fruit quality *** acids,citric acid,and quinic acid were significantly(P<0.05)and positively correlated with titratable *** molecules showed a strong and positive correlation with total soluble ***,the study dissected the genetic basis of fruit quality traits and established an association between these fruit quality traits and metabolites.

关键词： cultivar linkage traits

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