Redox processes in biological systems

Pradedova, E. V.; Nimaeva, O. D.; Salyaev, R. K.

doi:10.1134/s1021443717050107

Cited by 30 publications

(13 citation statements)

References 33 publications

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“…Ascorbate peroxidase neutralizes even considerable concentrations of the former [42]. By taking part in the ascorbate-glutathione, ascorbate peroxidase decreases the content of H 2 O 2 , maintains redox balance in a cell and preserves the level of glutathione and ascorbic acid [43]. Highly specific to ascorbate, the enzyme rapidly becomes inactive in its absence [41].…”

Section: Discussionmentioning

confidence: 99%

Ecological and Geochemical Conditions for the Accumulation of Antioxidants in the Leaves of Lathyrus maritimus (L.) Bigel

Maslennikov

Головина

Artemenko

2020

Plants

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The article explores how location affected the dynamics of accumulation of ascorbic acid (AC) and oxidized forms of AC—dehydroascorbic acid (DAA) and diketogulonic acid (DKGA) in beach pea during ontogenetic development. Our analysis focuses on research of the ecological and geochemical conditions growing of the plant on the Curonian Spit. The level of hydrogen peroxide and the activity of enzymes that break it down were analyzed. Antioxidant activity and the total concentration of phenolics were evaluated in the leaves of beach pea on the leeward and windward sides of the foredune. It was established that the level of AC, DAA, and DKGA was higher in the plants growing on the windward side of the foredune. A higher concentration of peroxy compounds, which stimulate the biosynthesis of antioxidant enzymes (catalase, ascorbate peroxidase), polyphenols, and other low molecular antioxidants (AOA) was observed in the leaves of these plants. The plants on the windward side enter phenological stages one or two weeks later than their counterparts on the leeward side of the foredune do. There was a generally negative correlation between the temperature of the soil and the accumulation of ascorbate system acids in the leaves of the studied plants (r = −0.46/(−0.68), p < 0.05). The accumulation of low molecular antioxidants and enzymes in beach pea suggests their adaptation to the adverse conditions of the windward side of the foredune.

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Section: Discussionmentioning

confidence: 99%

Ecological and Geochemical Conditions for the Accumulation of Antioxidants in the Leaves of Lathyrus maritimus (L.) Bigel

Maslennikov

Головина

Artemenko

2020

Plants

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“…Glutathione is synthesized in the cytosol, and plays a critical role to prevent the mitochondria from the detrimental effects of ROS produced by electron transport [ 24 ]. The previous study has revealed that glutathione peroxidase enzymes catalyze the neutralization of peroxide through the glutathione redox system [ 25 ]. In support of this, circulating expression of glutathione peroxidase in the prostate tissue and plasma are markedly reduced in patients with prostate cancer.…”

Section: Main Bodymentioning

confidence: 99%

Oxidative Stress, Diet and Prostate Cancer

Tan

Norhaizan

2021

World J Mens Health

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Prostate cancer has become the second leading cancer in men worldwide. Androgen plays an important role in normal functioning, development, and differentiation of the prostate, and thus is considered to be the most powerful candidate that mediates reactive oxygen species (ROS) balance in the prostate. The elevation of ROS has been associated with the progression and development of this disease. Conventional therapy has shown a high cure rate in patients with localized prostate cancer. Despite the patients respond favorably initially, this therapy fails to response in the advanced stage of the diseases even in the absence of androgens. Indeed, the onset and progression of prostate cancer could be prevented by changing dietary habits. Much information indicates that oxidative stress and prostate cancer can be modulated by dietary components rich in antioxidants. While there is substantial evidence to suggest an association between prostate cancer risk and ROS-mediated oxidative stress; therefore, the interactions and mechanisms of this phenomenon are worth to discuss further. This review aimed to discuss the mechanisms of action of oxidative stress involved in the progression of prostate cancer. We also highlighted how some of the vital dietary components dampen or exacerbate inflammation, oxidative stress, and prostate cancer. Overall, the reported information would provide a useful approach to the prevention of prostate cancer.

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“…The metabolism of all aerobic organisms, including plants, is based on an array of redox processes, critically important for both catabolic and anabolic pathways [ 107 , 108 , 109 ]. Redox reactions in electron transport chains (ETCs) of mitochondria and chloroplasts are characterized with high rates of electron or/and energy transfer, that inevitably lead to the formation of reactive oxygen species (ROS).…”

Section: Mechanisms Of Seed Antioxidant and Redox Protectionmentioning

confidence: 99%

Desiccation Tolerance as the Basis of Long-Term Seed Viability

Smolikova

Leonova

Vashurina

et al. 2020

IJMS

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Desiccation tolerance appeared as the key adaptation feature of photoautotrophic organisms for survival in terrestrial habitats. During the further evolution, vascular plants developed complex anatomy structures and molecular mechanisms to maintain the hydrated state of cell environment and sustain dehydration. However, the role of the genes encoding the mechanisms behind this adaptive feature of terrestrial plants changed with their evolution. Thus, in higher vascular plants it is restricted to protection of spores, seeds and pollen from dehydration, whereas the mature vegetative stages became sensitive to desiccation. During maturation, orthodox seeds lose up to 95% of water and successfully enter dormancy. This feature allows seeds maintaining their viability even under strongly fluctuating environmental conditions. The mechanisms behind the desiccation tolerance are activated at the late seed maturation stage and are associated with the accumulation of late embryogenesis abundant (LEA) proteins, small heat shock proteins (sHSP), non-reducing oligosaccharides, and antioxidants of different chemical nature. The main regulators of maturation and desiccation tolerance are abscisic acid and protein DOG1, which control the network of transcription factors, represented by LEC1, LEC2, FUS3, ABI3, ABI5, AGL67, PLATZ1, PLATZ2. This network is complemented by epigenetic regulation of gene expression via methylation of DNA, post-translational modifications of histones and chromatin remodeling. These fine regulatory mechanisms allow orthodox seeds maintaining desiccation tolerance during the whole period of germination up to the stage of radicle protrusion. This time point, in which seeds lose desiccation tolerance, is critical for the whole process of seed development.

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Redox processes in biological systems

Cited by 30 publications

References 33 publications

Ecological and Geochemical Conditions for the Accumulation of Antioxidants in the Leaves of Lathyrus maritimus (L.) Bigel

Ecological and Geochemical Conditions for the Accumulation of Antioxidants in the Leaves of Lathyrus maritimus (L.) Bigel

Oxidative Stress, Diet and Prostate Cancer

Desiccation Tolerance as the Basis of Long-Term Seed Viability

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