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Lipid Peroxidation and Protein Carbonylation in Human Diseases

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Biochemistry".

Deadline for manuscript submissions: 20 June 2025 | Viewed by 2100

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Department of Medical Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria
Interests: oxidative stress; diabetes; natural antioxidants; asthma; free radicals
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Dear Colleagues,

Free radicals, whether produced in the human body during metabolic processes or derived from the environment, have the potential to oxidize both lipids and proteins. This oxidation process can lead to the formation of lipid peroxides and oxidized forms of proteins that play critical roles in cell death, including apoptosis, autophagy, and ferroptosis. The body has built-in defense mechanisms to counteract the harmful effects of free radicals, including the presence of antioxidants, such as vitamins C and E, and enzymes, such as superoxide dismutase and catalase. These antioxidants donate electrons to free radicals, neutralizing their reactivity and preventing further oxidative damage. When there is an imbalance between free radical production and the body’s antioxidant defenses, oxidative stress can occur. Oxidative stress is associated with a wide range of health problems, including ageing, neurodegenerative diseases, cardiovascular diseases, cancer, and inflammatory diseases.

Dr. Galina Nikolova
Guest Editor

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Keywords

  • free radicals
  • lipid peroxidation
  • protein carbonylation
  • apoptosis
  • autophagy
  • ferroptosis
  • antioxidant enzymes

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Published Papers (1 paper)

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Research

18 pages, 1792 KiB  
Article
Circulatory Indicators of Lipid Peroxidation, the Driver of Ferroptosis, Reflect Differences between Relapsing–Remitting and Progressive Multiple Sclerosis
by Ljiljana Stojkovic, Ana Djordjevic, Milan Stefanovic, Aleksandra Stankovic, Evica Dincic, Tamara Djuric and Maja Zivkovic
Int. J. Mol. Sci. 2024, 25(20), 11024; https://doi.org/10.3390/ijms252011024 - 14 Oct 2024
Cited by 3 | Viewed by 1649
Abstract
Ferroptosis, a lipid peroxidation- and iron-mediated type of regulated cell death, relates to both neuroinflammation, which is common in relapsing-remitting multiple sclerosis (RRMS), and neurodegeneration, which is prevalent in progressive (P)MS. Currently, findings related to the molecular markers proposed in this paper in [...] Read more.
Ferroptosis, a lipid peroxidation- and iron-mediated type of regulated cell death, relates to both neuroinflammation, which is common in relapsing-remitting multiple sclerosis (RRMS), and neurodegeneration, which is prevalent in progressive (P)MS. Currently, findings related to the molecular markers proposed in this paper in patients are scarce. We analyzed circulatory molecular indicators of the main ferroptosis-related processes, comprising lipid peroxidation (malondialdehyde (MDA), 4-hydroxynonenal (4-HNE), and hexanoyl–lysine adduct (HEL)), glutathione-related antioxidant defense (total glutathione (reduced (GSH) and oxidized (GSSG)) and glutathione peroxidase 4 (GPX4)), and iron metabolism (iron, transferrin and ferritin) to estimate their contributions to the clinical manifestation of MS and differences between RRMS and PMS disease course. In 153 patients with RRMS and 69 with PMS, plasma/serum lipid peroxidation indicators and glutathione were quantified using ELISA and colorimetric reactions, respectively. Iron serum concentrations were determined using spectrophotometry, and transferrin and ferritin were determined using immunoturbidimetry. Compared to those with RRMS, patients with PMS had decreased 4-HNE (median, 1368.42 vs. 1580.17 pg/mL; p = 0.03). Interactive effects of MS course (RRMS/PMS) and disease-modifying therapy status on MDA (p = 0.009) and HEL (p = 0.02) levels were detected. In addition, the interaction of disease course and self-reported fatigue revealed significant impacts on 4-HNE levels (p = 0.01) and the GSH/GSSG ratio (p = 0.04). The results also show an association of MS course (p = 0.03) and EDSS (p = 0.04) with GSH levels. No significant changes were observed in the serum concentrations of iron metabolism indicators between the two patient groups (p > 0.05). We suggest circulatory 4-HNE as an important parameter related to differences between RRMS and PMS. Significant interactions of MS course and other clinically relevant parameters with changes in redox processes associated with ferroptosis support the further investigation of MS with a larger sample while taking into account both circulatory and central nervous system estimation. Full article
(This article belongs to the Special Issue Lipid Peroxidation and Protein Carbonylation in Human Diseases)
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