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Free Radical, Oxidative Stress, and Antioxidant Impact on Human Health

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Applied Biosciences and Bioengineering".

Deadline for manuscript submissions: 20 September 2026 | Viewed by 324

Special Issue Editor


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Guest Editor
Department of Convergence Medicine, Wonju College of Medicine, Yonsei University, Wonju 26426, Republic of Korea
Interests: molecular hydrogen; inflammation; oxidative stress; antioxidant; alkaline ionized water
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Special Issue Information

Dear Colleagues,

Oxidative stress arises from an imbalance between reactive oxygen species (ROS) production and the body's antioxidant defense systems, leading to cellular and molecular damage. Excess ROS contribute to lipid peroxidation, protein oxidation, and DNA damage, triggering inflammatory responses and mitochondrial dysfunction. This oxidative burden is implicated in the pathogenesis of various chronic diseases, including neurodegenerative disorders, cardiovascular diseases, cancer, diabetes, and autoimmune conditions. Understanding the mechanisms by which free radicals drive disease progression is essential for developing effective therapeutic interventions.

Antioxidants, both enzymatic (e.g., superoxide dismutase, catalase, glutathione peroxidase) and non-enzymatic (e.g., vitamins C and E, polyphenols, flavonoids), play a crucial role in neutralizing ROS and maintaining redox homeostasis. Numerous studies highlight the potential of antioxidant-based therapies, redox-modulating compounds, and dietary interventions in mitigating oxidative stress-related damage. This Special Issue welcomes original research and review articles that explore oxidative stress mechanisms, novel antioxidant strategies, redox-targeted therapeutics, and clinical applications. We encourage the submission of papers utilizing advanced methodologies, including omics technologies, bioinformatics, and translational research models. This Special Issue aims to foster the development of novel therapeutic strategies for oxidative stress-related diseases by advancing our understanding of oxidative stress and antioxidant defense systems.

Dr. Cheol-Su Kim
Guest Editor

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • oxidative stress
  • free radicals
  • antioxidants
  • redox homeostasis
  • ROS
  • inflammation
  • mitochondrial dysfunction
  • lipid peroxidation
  • redox signaling
  • therapeutic interventions

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Published Papers (1 paper)

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Research

24 pages, 9738 KB  
Article
Protective Effects of Violaxanthin on Cellular Oxidative Stress via NRF2 Activation in H2O2-Stimulated Human Keratinocytes
by Ji-Seon Kim, Hee Su Kim, Hee-Jae Shin, Seokmuk Park, Ji Won Kim, Su-Bin Park, Hee-Sik Kim, Yong Jae Lee and Seunghee Bae
Appl. Sci. 2026, 16(10), 5132; https://doi.org/10.3390/app16105132 (registering DOI) - 21 May 2026
Abstract
Excessive accumulation of reactive oxygen species from exogenous and endogenous stressors can cause cellular damage. Chlorella contains diverse bioactive compounds, and violaxanthin, a major carotenoid pigment found in Chlorella sp. HS-V, has been reported to possess anti-inflammatory, anticancer, and antioxidant properties. We investigated [...] Read more.
Excessive accumulation of reactive oxygen species from exogenous and endogenous stressors can cause cellular damage. Chlorella contains diverse bioactive compounds, and violaxanthin, a major carotenoid pigment found in Chlorella sp. HS-V, has been reported to possess anti-inflammatory, anticancer, and antioxidant properties. We investigated the effect of violaxanthin on hydrogen peroxide (H2O2)-induced oxidative stress in human keratinocytes. Chlorella sp. HS-V extract significantly restored the H2O2-induced decrease in cell viability. Similarly, violaxanthin reduced H2O2-induced cytotoxicity and intracellular reactive oxygen species levels, which was associated with the upregulation of antioxidant enzyme expression. Under H2O2-induced oxidative stress conditions, violaxanthin may enhance cellular antioxidant defense by promoting nuclear factor erythroid 2-related factor 2 (NRF2) translocation through the phosphoinositide 3-kinase/protein kinase B/glycogen synthase kinase 3β (PI3K/AKT/GSK3β) signaling pathway. Additionally, violaxanthin improved H2O2-impaired wound healing in HaCaT human keratinocyte cells and reduced senescence-associated beta-galactosidase-positive normal human epidermal keratinocytes. Overall, these findings suggest that violaxanthin may serve as a potential therapeutic agent for mitigating oxidative stress-induced cellular dysfunction. Full article
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