An Investigation of Vanillin Imposed Oxidative Stress in Corn (Zea mays L.) and the Activities of Antioxidative Enzymes

2005 ◽  
Vol 9 (1) ◽  
pp. 34-38 ◽  
Author(s):  
A.M. Nojavan . ◽  
M. Khorshidi .
2009 ◽  
Vol 60 (3) ◽  
pp. 967-978 ◽  
Author(s):  
E. Doria ◽  
L. Galleschi ◽  
L. Calucci ◽  
C. Pinzino ◽  
R. Pilu ◽  
...  

2008 ◽  
Vol 20 (2) ◽  
pp. 153-157 ◽  
Author(s):  
Nitika Arora ◽  
Renu Bhardwaj ◽  
Priyanka Sharma ◽  
Hardesh K. Arora
Keyword(s):  
Zea Mays ◽  

2019 ◽  
Vol 20 (7) ◽  
pp. 1788 ◽  
Author(s):  
Małgorzata Rudnicka ◽  
Michał Ludynia ◽  
Waldemar Karcz

Naphthoquinones, plants secondary metabolites are known for their antibacterial, antifungal, anti-inflammatory, anti-cancer and anti-parasitic properties. The biological activity of naphthoquinones is connected with their ability to generate reactive oxygen species and to modify biological molecules at their nucleophilic sites. In our research, the effect of naphthazarin (DHNQ) combined with 2-hydroxy-1,4-naphthoquinone (NQ-2-OH) or 1,4-naphthoquinone (1,4-NQ) on the elongation growth, pH changes of the incubation medium, oxidative stress and redox activity of maize coleoptile cells were investigated. This paper describes experiments performed with maize (Zea mays L.) coleoptile segments, which is a classical model system to study plant cell elongation growth. The data presented clearly demonstrate that lawsone and 1,4-naphthoquinone combined with naphthazarin, at low concentrations (1 and 10 nM), reduced the endogenous and IAA-induced (Indole-3-Acetic Acid) elongation growth of maize coleoptile segments. Those changes in growth correlated with the proton concentration in the incubation medium, which suggests that the changes in the growth of maize coleoptile segments observed in the presence of naphthoquinones are mediated through the activity of PM H+-ATPase. The presence of naphthoquinones induced oxidative stress in the maize coleoptile tissue by producing hydrogen peroxide and causing changes in the redox activity. Moreover, the incubation of maize segments with both naphthoquinones combined with naphthazarin resulted in lipid peroxidation and membrane damage. The regulation of PM H+-ATPase activity, especially its inhibition, may result from two major types of reaction: first, a direct interaction between an enzyme and naphthoquinone, which leads to the covalent modification of the protein thiols and the generation of thioethers, which have been found to alter the activity of the PM H+-ATPases; second, naphthoquinones induce reactive oxygen species (ROS) production, which inhibits PM H+-ATPases by increasing cytosolic Ca2+. This harmful effect was stronger when naphthazarin and 1,4-naphthoquinone were added together. Taking these results into account, it can be suggested that by combining naphthoquinones in small quantities, an alternative to synthetic pesticides could be developed.


Author(s):  
Jesús Magaña Cerino ◽  
Héctor Peniche Pavía ◽  
Axel Tiessen ◽  
Carmen Gurrola Díaz

2021 ◽  
Vol 5 (Supplement_2) ◽  
pp. 595-595
Author(s):  
Ivan Luzardo ◽  
Rocio Campos-Vega ◽  
Liceth Cuellar-Nuñez ◽  
Elvira Gonzalez de Mejia ◽  
Guadalupe Loarca-Pina

Abstract Objectives This research aimed to evaluate the effect of the consumption of a baked corn and bean snack in the intestinal oxidative stress and energetic metabolism in chronic colitis in vivo. Methods The polyphenolic composition of baked 70% nixtamalized corn (Zea mays L.) and 30% cooked common bean (Phaseolus vulgaris L.) snack (70/30) was characterized by UHPLC-QTOF/MS. Dextran sodium sulfate (DSS, 2% v/v) was used as chemical inductor of colitis in 45 CD-1/ICR male mice (6–8 weeks age) randomly distributed in 5 groups (treatment 5 weeks): G1 (basal diet: BD + water), G2 (BD), G3 (20 g 70/30/kg body weight: BW/day + BS), G4 (40 g 70/30/kg BW/day + BS), and G5 (60 g 70/30/kg BW/day + BS). G2-G5 groups were administered DSS every other week, during 5-weeks. BW and disease activity indexes (DAI) were measured weekly. Liver and colon histopathological and immunohistochemical (TGF-b and Ki-67) analysis was performed. Serum antioxidant capacity, pro-inflammatory cytokines, and fecal composition (polyphenols and short-chain fatty acids) were quantified. The colonic mRNA expression of genes associated with oxidative stress and energy metabolism was performed using a mice gene array. Results p-Coumaric and ferulic acids were the main identified phenolics (72–103 mg/g snack, respectively). G3 and G4 exhibited the highest BW (+2.94%) and lowest DAI scores (0.5–1.5) (p < 0.05) among the DSS-induced groups, compared to G2. G4 showed preservation of colon architecture from 70/30-administered groups (histological score: 4.30 ± 0.13), while G3 and G4 exhibited the highest seric antioxidant capacity values (130–147 mg equivalents Trolox/mL). Snack-added groups displayed the lowest IL-6 and TNF-a values (598–657 pg/mL and 82–277 pg/mL, respectively) (p < 0.05) and the highest amount of fecal polyphenols and short-chain fatty acids (21–25 mM). G1 and G4 were clustered in the same groups from the gene analysis (p < 0.05), being the adiponectin receptor 1 (ADIPOR1) (-0.17 fold), erythroid-derived 2-like 2 (NRF2) (0.32–0.34 fold), and superoxide dismutase (SOD2) (0.58–1.25 fold) the main regulated genes, compared to G2. Conclusions Results suggested that 70/30 baked corn and bean snack consumption protects the colon from inflammatory symptoms, decreasing oxidative stress in vivo. Funding Sources The funding received by CONACyT is appreciated.


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