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Antioxidants, Volume 8, Issue 9

September 2019 - 92 articles

Cover Story: The phenolic composition of virgin olive oil is strongly determined by the content and distribution of secoiridoid phenolic glycosides present in the olive fruit. Oleuropein, containing a hydroxytyrosol residue, is the most important phenolic compound in olive fruit and hydroxytyrosol is the phenolic component responsible for most of the health-promoting properties of virgin olive oil. An aromatic aldehyde synthase gene (OeAAS) was identified, synthesized, and expressed in Escherichia coli by coupling metabolic analyses and transcriptomic data from different olive cultivars with divergent phenolic profiles. Functional characterization studies demonstrate that OeAAS is a bifunctional enzyme that catalyzes the conversion of L-DOPA into 3,4-DHPAA, the aldehyde precursor of hydroxytyrosol. The results support that OeAAS a key role in the accumulation of hydroxytyrosol-derived compounds in olive fruit and virgin olive oil. View

Articles (92)

  • Article
  • Open Access
76 Citations
5,474 Views
19 Pages

Chemical Profiling of Polyphenolics in Eucalyptus globulus and Evaluation of Its Hepato–Renal Protective Potential Against Cyclophosphamide Induced Toxicity in Mice

  • Mosad A. Ghareeb,
  • Mansour Sobeh,
  • Walaa H. El-Maadawy,
  • Hala Sh. Mohammed,
  • Heba Khalil,
  • Sanaa Botros and
  • Michael Wink

19 September 2019

Cyclophosphamide (CP) is a potent anti-neoplastic and immunosuppressive agent; however, it causes multi-organ toxicity. We elucidated the protective activities of Eucalyptus globulus (EG) leaf extract against CP-induced hepato–renal toxicity. M...

  • Article
  • Open Access
35 Citations
7,358 Views
19 Pages

Antioxidant and Anti-Inflammatory Properties of a Thuja occidentalis Mother Tincture for the Treatment of Ulcerative Colitis

  • Miruna Silvia Stan,
  • Sorina Nicoleta Voicu,
  • Sonia Caruntu,
  • Ionela Cristina Nica,
  • Neli-Kinga Olah,
  • Ramona Burtescu,
  • Cornel Balta,
  • Marcel Rosu,
  • Hildegard Herman and
  • Anca Hermenean
  • + 1 author

19 September 2019

Inflammatory bowel disease (IBD) represents a group of chronic autoimmune and idiopathic disorders that are characteristic of industrialized countries. In contrast to drug therapies, which exert several side effects, herbal remedies have constantly a...

  • Article
  • Open Access
49 Citations
6,141 Views
14 Pages

Biological and Chemical Insights of Beech (Fagus sylvatica L.) Bark: A Source of Bioactive Compounds with Functional Properties

  • Corneliu Tanase,
  • Andrei Mocan,
  • Sanda Coșarcă,
  • Alexandru Gavan,
  • Alexandru Nicolescu,
  • Ana-Maria Gheldiu,
  • Dan C. Vodnar,
  • Daniela-Lucia Muntean and
  • Ovidiu Crișan

19 September 2019

The present study aimed, on the one hand, to improve the yield of microwave assisted extraction (MAE) of polyphenols from beech bark by using a design of experiments (DoE) approach. On the other hand, beech bark extracts (BBE) were characterized in t...

  • Article
  • Open Access
9 Citations
3,649 Views
14 Pages

Endogenous and Exogenous Melatonin Exposure Attenuates Hepatic MT1 Melatonin Receptor Protein Expression in Rat

  • Alexander M. Mathes,
  • Paul Heymann,
  • Christian Ruf,
  • Ragnar Huhn,
  • Jochen Hinkelbein,
  • Thomas Volk and
  • Tobias Fink

18 September 2019

Melatonin receptors are highly relevant for the hepatoprotective effects of the pineal hormone melatonin after experimental hemorrhagic shock in rats. In this study, we sought to determine the spatial expression pattern and a putative regulation of t...

  • Article
  • Open Access
40 Citations
5,199 Views
18 Pages

Salivary FRAP as A Marker of Chronic Kidney Disease Progression in Children

  • Mateusz Maciejczyk,
  • Julita Szulimowska,
  • Katarzyna Taranta-Janusz,
  • Katarzyna Werbel,
  • Anna Wasilewska and
  • Anna Zalewska

18 September 2019

Chronic kidney disease (CKD) is one of the most common modern-age diseases in children. Kidney failure does not reveal any symptoms for a long time; therefore, new biomarkers are sought, preferably those reflecting an early stage of CKD. The aim of o...

  • Article
  • Open Access
26 Citations
4,776 Views
22 Pages

Diallyl Trisulfide Protects Rat Brain Tissue against the Damage Induced by Ischemia-Reperfusion through the Nrf2 Pathway

  • Carlos A. Silva-Islas,
  • María E. Chánez-Cárdenas,
  • Diana Barrera-Oviedo,
  • Alma Ortiz-Plata,
  • José Pedraza-Chaverri and
  • Perla D. Maldonado

18 September 2019

Stroke is a public health problem due to its high mortality and disability rates; despite these, the pharmacological treatments are limited. Oxidative stress plays an important role in cerebral damage in stroke and the activation of the nuclear facto...

  • Article
  • Open Access
41 Citations
5,535 Views
11 Pages

18 September 2019

Reactive Oxygen Species (ROS) and Reactive Nitrogen Species (RNS) have been proposed as universal signaling molecules in plant stress responses. There are a growing number of studies suggesting that hydrogen sulfide (H2S) or Reactive Sulfur Species (...

  • Article
  • Open Access
15 Citations
4,530 Views
18 Pages

18 September 2019

LC-ESI-MS (Liquid Chromatography coupled with Electrospray Ionization Mass Spectrometry profiling of a methanol extract from Buddleia indica (BIM) leaves revealed 12 main peaks in which verbascoside and buddlenoid B represent the major compounds. The...

  • Article
  • Open Access
69 Citations
8,953 Views
18 Pages

Glutathione Induced Immune-Stimulatory Activity by Promoting M1-Like Macrophages Polarization via Potential ROS Scavenging Capacity

  • Da Hye Kwon,
  • Hyesook Lee,
  • Cheol Park,
  • Su-Hyun Hong,
  • Sang Hoon Hong,
  • Gi-Young Kim,
  • Hee-Jae Cha,
  • Suhkmann Kim,
  • Heui-Soo Kim and
  • Hye-Jin Hwang
  • + 1 author

18 September 2019

The present study investigated the immunomodulatory activity of reduced glutathione (GSH) by assessment of the macrophage polarization (MP)-mediated immune response in RAW 264.7 cells. Furthermore, we identified the signal pathway associated with imm...

  • Article
  • Open Access
5 Citations
5,128 Views
19 Pages

Catalase-Like Antioxidant Activity is Unaltered in Hypochlorous Acid Oxidized Horse Heart Myoglobin

  • Gulfam Ahmad,
  • Belal Chami,
  • Mary El Kazzi,
  • Xiaosuo Wang,
  • Maria Tereza S. Moreira,
  • Natasha Hamilton,
  • Aung Min Maw,
  • Thomas W. Hambly and
  • Paul K. Witting

18 September 2019

Activated neutrophils release myeloperoxidase that produces the potent oxidant hypochlorous acid (HOCl). Exposure of the oxygen transport protein horse heart myoglobin (hhMb) to HOCl inhibits Iron III (Fe(III))-heme reduction by cytochrome b5 to oxyg...

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Antioxidants - ISSN 2076-3921