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https://www.readbyqxmd.com/read/29329836/fermented-apulian-table-olives-effect-of-selected-microbial-starters-on-polyphenols-composition-antioxidant-activities-and-bioaccessibility
#1
Isabella D'Antuono, Angelica Bruno, Vito Linsalata, Fiorenza Minervini, Antonella Garbetta, Maria Tufariello, Giovanni Mita, Antonio F Logrieco, Gianluca Bleve, Angela Cardinali
The effects of fermentation by autochthonous microbial starters on phenolics composition of Apulian table olives, Bella di Cerignola (BDC), Termite di Bitetto (TDB) and Cellina di Nardò (CEL) were studied, highlighting also the cultivars influence. In BDC with starter, polyphenols amount doubled compared with commercial sample, while in TDB and CEL, phenolics remain almost unchanged. The main phenolics were hydroxytyrosol, tyrosol, verbascoside and luteolin, followed by hydroxytyrosol-acetate detected in BDC and cyanidine-3-glucoside and quercetin in CEL...
May 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29317147/fusarithioamide-b-a-new-benzamide-derivative-from-the-endophytic-fungus-fusarium-chlamydosporium-with-potent-cytotoxic-and-antimicrobial-activities
#2
Sabrin R M Ibrahim, Gamal A Mohamed, Rwaida A Al Haidari, Mohamed F Zayed, Amal A El-Kholy, Ehab S Elkhayat, Samir A Ross
Fusarithioamide B (6), a new aminobenzamide derivative with unprecedented carbon skeleton and five known metabolites: stigmast-4-ene-3-one (1), stigmasta-4,6,8(14),22-tetraen-3-one (2), p-hydroxyacetophenone (3), tyrosol (4), and fusarithioamide A (5) were separated from Fusarium chlamydosporium EtOAc extract isolated from Anvillea garcinii (Burm.f.) DC. leaves (Asteraceae). The structure elucidation and completeassignment of the isolated metabolites were performed mainly by the aid of various NMR and MS data...
December 30, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29299572/phenolic-profiles-of-eight-olive-cultivars-from-algeria-effect-of-bactrocera-oleae-attack
#3
Lynda Medjkouh, Abderezak Tamendjari, Rita C Alves, Rahima Laribi, M Beatriz P P Oliveira
Olive fly (Bactrocera oleae R.) is the most harmful pest of olive trees (O. europaea) affecting their fruit development and oil production. Olive fruits have characteristic phenolic compounds, important for plant defense against pathogens and insects, and with many biological activities, they contribute to the high value of this crop. In this study, olives from 8 cultivars (Abani, Aellah, Blanquette de Guelma, Chemlal, Ferkani, Limli, Rougette de Mitidja and Souidi) with different degrees of fly infestation (0%, not attacked; 100%, all attacked; and real attack %) and different maturation indices were sampled and analysed...
January 4, 2018: Food & Function
https://www.readbyqxmd.com/read/29287419/bioaccessibility-of-phenolic-compounds-following-in-vitro-large-intestine-fermentation-of-nuts-for-human-consumption
#4
Gabriele Rocchetti, Giulia Chiodelli, Gianluca Giuberti, Luigi Lucini
A bioaccessibility study of polyphenols after in vitro simulated large intestine fermentation was carried out on edible nuts. Raw nuts were also analysed for total phenolic content and antioxidant potential, considering both bound and free phenolics. The highest phenolic content was found in walnuts, followed by pistachios extracts (596.9 and 410.1 mg gallic acid equivalents 100 g-1, respectively). Consistently, the total antioxidant capacity was highest in walnuts (3689.7 μM trolox equivalents 100 g-1) followed by peanuts and pistachios (3169...
April 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29287352/antioxidant-properties-of-tyrosol-and-hydroxytyrosol-saturated-fatty-acid-esters
#5
Yuanxin Sun, Dayong Zhou, Fereidoon Shahidi
No abstract text is available yet for this article.
April 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29283995/protection-by-extra-virgin-olive-oil-against-oxidative-stress-in-vitro-and-in-vivo-chemical-and-biological-studies-on-the-health-benefits-due-to-a-major-component-of-the-mediterranean-diet
#6
Miriam Rossi, Francesco Caruso, Lorraine Kwok, Grace Lee, Alessio Caruso, Fabio Gionfra, Elena Candelotti, Stuart L Belli, Nora Molasky, Kathleen M Raley-Susman, Stefano Leone, Tomáš Filipský, Daniela Tofani, Jens Pedersen, Sandra Incerpi
We report the results of in vivo studies in Caenorhabditis elegans nematodes in which addition of extra virgin olive oil (EVOO) to their diet significantly increased their life span with respect to the control group. Furthermore, when nematodes were exposed to the pesticide paraquat, they started to die after two days, but after the addition of EVOO to their diet, both survival percentage and lifespans of paraquat-exposed nematodes increased. Since paraquat is associated with superoxide radical production, a test for scavenging this radical was performed using cyclovoltammetry and the EVOO efficiently scavenged the superoxide...
2017: PloS One
https://www.readbyqxmd.com/read/29281883/establishing-an-artificial-pathway-for-efficient-biosynthesis-of-hydroxytyrosol
#7
Xianglai Li, Zhenya Chen, Yifei Wu, Yajun Yan, Xinxiao Sun, Qipeng Yuan
Hydroxytyrosol (HT) is a valuable natural phenolic compound with strong antioxidant activity and various physiological and pharmaceutical functions. In this study, we established an artificial pathway for biosynthesis of HT. First, efficient enzymes were selected to construct tyrosol biosynthetic pathway. ARO10 from Saccharomyces cerevisiae was shown to be a better ketoacid decarboxylase than Kivd from Lactococcus lactis for tyrosol production. While knockout of feaB significantly decreased accumulation of the byproduct 4-hydroxyphenylacetic acid, overexpression of alcohol dehydrogenase ADH6 further improved tyrosol production...
December 28, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/29277428/complete-pathway-elucidation-and-heterologous-reconstitution-of-rhodiola-salidroside-biosynthesis
#8
Michael P Torrens-Spence, Tomáš Pluskal, Fu-Shuang Li, Valentina Carballo, Jing-Ke Weng
Salidroside is a bioactive tyrosine-derived phenolic natural product found in medicinal plants under the Rhodiola genus. In addition to their anti-fatigue and anti-anoxia roles in traditional medicine, Rhodiola total extract and salidroside have also displayed medicinal properties as anti-cardiovascular diseases and anti-cancer agents. The resulting surge in global demand of Rhodiola plants and salidroside has driven some species close to extinction. Here, we report the full elucidation of Rhodiola salidroside biosynthetic pathway utilizing the first comprehensive transcriptomics and metabolomics datasets for Rhodiola rosea...
December 19, 2017: Molecular Plant
https://www.readbyqxmd.com/read/29234485/regulation-of-sirtuin-mediated-protein-deacetylation-by-cardioprotective-phytochemicals
#9
REVIEW
Niria Treviño-Saldaña, Gerardo García-Rivas
Modulation of posttranslational modifications (PTMs), such as protein acetylation, is considered a novel therapeutic strategy to combat the development and progression of cardiovascular diseases. Protein hyperacetylation is associated with the development of numerous cardiovascular diseases, including atherosclerosis, hypertension, cardiac hypertrophy, and heart failure. In addition, decreased expression and activity of the deacetylases Sirt1, Sirt3, and Sirt6 have been linked to the development and progression of cardiac dysfunction...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29223063/phytochemical-study-of-the-trunk-bark-of-citharexylum-spinosum-l-growing-in-tunisia-isolation-and-structure-elucidation-of-iridoid-glycosides
#10
Ilyes Saidi, Pierre Waffo-Téguo, Asma E L Ayeb-Zakhama, Fethia Harzallah-Skhiri, Axel Marchal, Hichem Ben Jannet
A phytochemical investigation of the trunk bark ethyl acetate extract of Citharexylum spinosum L. has led to the isolation of four previously undescribed iridoid glycosides, tunispinosides A-D, and five known phenylethanoid glycosides, verbascoside, leucosceptoside A, martynoside, isoverbascoside and plantainoside C, together with 4-hydroxy-2,6-dimethoxyphenyl 6'-O-vanilloyl-β-D-glucopyranoside, two 8,3'-neolignan glycosides, plucheosides D1-D2, coniferyl aldehyde, vanillic acid, syringic acid, ferulic acid and tyrosol...
December 6, 2017: Phytochemistry
https://www.readbyqxmd.com/read/29194389/variation-in-cyp2a6-activity-and-personalized-medicine
#11
REVIEW
Julie-Anne Tanner, Rachel F Tyndale
The cytochrome P450 2A6 (CYP2A6) enzyme metabolizes several clinically relevant substrates, including nicotine-the primary psychoactive component in cigarette smoke. The gene that encodes the CYP2A6 enzyme is highly polymorphic, resulting in extensive interindividual variation in CYP2A6 enzyme activity and the rate of metabolism of nicotine and other CYP2A6 substrates including cotinine, tegafur, letrozole, efavirenz, valproic acid, pilocarpine, artemisinin, artesunate, SM-12502, caffeine, and tyrosol. CYP2A6 expression and activity are also impacted by non-genetic factors, including induction or inhibition by pharmacological, endogenous, and dietary substances, as well as age-related changes, or interactions with other hepatic enzymes, co-enzymes, and co-factors...
December 1, 2017: Journal of Personalized Medicine
https://www.readbyqxmd.com/read/29178712/role-of-tyrosol-on-candida-albicans-candida-glabrata-and-streptococcus-mutans-biofilms-developed-on-different-surfaces
#12
Douglas Roberto Monteiro, Laís Salomão Arias, Renan Aparecido Fernandes, Fabiana Gouveia Straioto, Débora Barros Barbosa, Juliano Pelim Pessan, Alberto Carlos Botazzo Delbem
PURPOSE: To assess the effect of tyrosol on the production of hydrolytic enzymes (by Candida biofilm cells) and acid (by Streptococcus mutans biofilms), as well as to quantify single and mixed biofilms of these species formed on acrylic resin (AR) and hydroxyapatite (HA). METHODS: Candida and S. mutans biofilms were formed on AR and HA in the presence of tyrosol during 48 hours. Next, acid proteinase, phospholipase and hemolytic activities of Candida biofilm cells were determined, while acid production by S...
February 2017: American Journal of Dentistry
https://www.readbyqxmd.com/read/29141574/anti-inflammatory-activity-of-extra-virgin-olive-oil-polyphenols-which-role-in-the-prevention-and-treatment-of-immune-mediated-inflammatory-diseases
#13
Carmela Santangelo, Rosaria Vari, Beatrice Scazzocchio, Patrizia De Sanctis, Claudio Giovannini, Massimo D'Archivio, Roberta Masella
Altered inflammatory response characterizes chronic immune-mediated inflammatory diseases (IMID) such as rheumatoid arthritis, inflammatory bowel disease, multiple sclerosis, systemic lupus erythematosus, and psoriasis. Accumulating evidence indicates that regular consumption of extra virgin olive oil (EVOO), the main source of fat in the Mediterranean diet, is associated with a reduced risk of developing chronic degenerative disorders such cardiovascular diseases, type 2 diabetes and cancer. The beneficial effects on health of EVOO have been attributed, besides to the monounsaturated fats content, to the presence of phenolic compounds that have antioxidant, anti-inflammatory and immunomodulatory properties...
November 13, 2017: Endocrine, Metabolic & Immune Disorders Drug Targets
https://www.readbyqxmd.com/read/29119177/physiological-linkage-of-gender-bioavailable-hydroxytyrosol-derivatives-and-their-metabolites-with-systemic-catecholamine-metabolism
#14
R Domínguez-Perles, D Auñón, F Ferreres, A Gil-Izquierdo
Despite extensive characterization of hydroxytyrosol (HT), there is a gap in the knowledge about its capacity to modulate catecholamine pathways. This study deals with the evaluation of the effects of HT, hydroxytyrosol acetate (HTA), and 3,4-dihydroxyphenylacetic acid (DOPAC), as well as their microbial metabolites (homovanillyl alcohol and tyrosol), on the excretion of catecholamines by UHPLC-ESI-QqQ-MS/MS upon administration at 1 and 5 mg kg(-1) to male and female rats. The evaluation of urinary dopamine, norepinephrine, normetanephrine, and 3-methoxytyramine demonstrated 12...
November 9, 2017: Food & Function
https://www.readbyqxmd.com/read/29105769/recovery-and-stability-over-time-of-phenolic-fractions-by-an-industrial-filtration-system-of-olive-mill-wastewaters-a-three-years-study
#15
Maria Bellumori, Lorenzo Cecchi, Annalisa Romani, Nadia Mulinacci, Marzia Innocenti
BACKGROUND: The recovery of phenolic compounds from olive milling is recognized as strategic for producers. The aim of this work was to evaluate the quality and stability of retentates obtained from olive mill wastewaters treated with a membrane filtration system constituted by a micro-, ultra- and nanofiltration followed by a final reverse osmosis, over three crop seasons. Efficiency was evaluated in terms of phenolic amount in the retentates and of organic load in the final discarded waters...
November 6, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29065513/argan-oil-mediated-attenuation-of-organelle-dysfunction-oxidative-stress-and-cell-death-induced-by-7-ketocholesterol-in-murine-oligodendrocytes-158n
#16
Asmaa Badreddine, Amira Zarrouk, El Mostafa Karym, Meryam Debbabi, Thomas Nury, Wiem Meddeb, Randa Sghaier, Maryem Bezine, Anne Vejux, Lucy Martine, Stéphane Grégoire, Lionel Bretillon, Emmanuelle Prost-Camus, Philippe Durand, Michel Prost, Thibault Moreau, Mustapha Cherkaoui-Malki, Boubker Nasser, Gérard Lizard
Argan oil is widely used in Morocco in traditional medicine. Its ability to treat cardiovascular diseases is well-established. However, nothing is known about its effects on neurodegenerative diseases, which are often associated with increased oxidative stress leading to lipid peroxidation and the formation of 7-ketocholesterol (7KC) resulting from cholesterol auto-oxidation. As 7KC induces oxidative stress, inflammation and cell death, it is important to identify compounds able to impair its harmful effects...
October 23, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29057813/composition-and-statistical-analysis-of-biophenols-in-apulian-italian-evoos
#17
Andrea Ragusa, Carla Centonze, Maria Elena Grasso, Maria Francesca Latronico, Pier Francesco Mastrangelo, Francesco Paolo Fanizzi, Michele Maffia
Extra-virgin olive oil (EVOO) is among the basic constituents of the Mediterranean diet. Its nutraceutical properties are due mainly, but not only, to a plethora of molecules with antioxidant activity known as biophenols. In this article, several biophenols were measured in EVOOs from South Apulia, Italy. Hydroxytyrosol, tyrosol and their conjugated structures to elenolic acid in different forms were identified and quantified by high performance liquid chromatography (HPLC) together with lignans, luteolin and α-tocopherol...
October 18, 2017: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/29037702/impact-of-functional-properties-and-release-kinetics-on-antioxidant-activity-of-biopolymer-active-films-and-coatings
#18
Nasreddine Benbettaïeb, Cadhla Tanner, Philippe Cayot, Thomas Karbowiak, Frédéric Debeaufort
This work deals with the study of the release kinetics of some natural antioxidants (ferulic acid, caffeic acid and tyrosol) from chitosan-fish gelatin edible films immersed ethanol at 96%, as well as the kinetics of their antioxidant activity using the DPPH assay. The aim was to determine how film functional properties influence the release kinetic and antioxidant activity. The addition of antioxidants to chitosan-fish gelatin matrix decreased the water vapour permeability by more than 30%. The tensile strength (TS) increased up to 50% after the incorporation of antioxidants...
March 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29027474/on-the-metabolites-produced-by-colletotrichum-gloeosporioides-a-fungus-proposed-for-the-ambrosia-artemisiifolia-biocontrol-spectroscopic-data-and-absolute-configuration-assignment-of-colletochlorin-a
#19
Marco Masi, Maria Chiara Zonno, Alessio Cimmino, Pierluigi Reveglia, Alexander Berestetskiy, Angela Boari, Maurizio Vurro, Antonio Evidente
Ambrosia artemisiifolia L. is responsible for serious allergies induced on humans. Different approaches for its control were proposed during the COST Action FA1203 "Sustainable management of Ambrosia artemisiifolia in Europe" (SMARTER). Fungal secondary metabolites often show potential herbicidal activity. Three phytotoxins were purified from the fungal culture filtrates of Colletotrichum gloeosporioides, isolated from infected leaves of A. artemisiifolia. They were identified by spectroscopic and chemical methods as colletochlorin A, orcinol and tyrosol (1, 2 and 3)...
October 13, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28974441/tyrosol-attenuates-lipopolysaccharide-induced-acute-lung-injury-by-inhibiting-the-inflammatory-response-and-maintaining-the-alveolar-capillary-barrier
#20
Yeon-Yong Kim, Soyoung Lee, Min-Jong Kim, Byeong-Cheol Kang, Hima Dhakal, Young-Ae Choi, Pil-Hoon Park, Hyukjae Choi, Tae-Yong Shin, Hyun Gyu Choi, Taeg Kyu Kwon, Dongwoo Khang, Sang-Hyun Kim
Acute lung injury (ALI) is a life-threatening disease characterized by increased pulmonary vascular permeability because of alveolar capillary barrier dysfunction and increased immune responses. This study determined the anti-inflammatory effect of tyrosol on lipopolysaccharide (LPS)-induced ALI and its underlying mechanisms of action. BALB/c mice were orally administered with tyrosol (0.1, 1, and 10 mg/kg) 1 h before an intratracheal injection of LPS (25 μg/50 μL). Oral treatment with tyrosol inhibited lung vascular permeability, histopathological changes, wet/dry lung weight ratio, and pulmonary vascular cell infiltration...
September 30, 2017: Food and Chemical Toxicology
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