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  • Open Access

    ARTICLE

    Death Ligand Signaling Involving the COX/PKC/MLKL Axis Mediates Erythrocyte Death by HDAC/DNMT Inhibitor, Parthenolide, through ROS Generation and Calcium Mobilization

    Sara Y. Aldeghaither, Jawaher Alsughayyir, Sabiha Fatima, Mohammad A. Alfhili*

    BIOCELL, Vol.49, No.11, pp. 2167-2180, 2025, DOI:10.32604/biocell.2025.071827 - 24 November 2025

    Abstract Objectives: Targeting epigenetic modifications in anticancer therapy is a promising approach to overcoming cancer cell chemoresistance. The histone deacetylase/DNA methyltransferase inhibitor, parthenolide (PTL), has antitumor activity, but contrasting findings exist on its effect in normal cells. This study aims to examine the non-genomic toxic mechanisms of PTL in human erythrocytes. Methods: Cell death as stimulated by 20–200 μM of PTL for 24 h at 37°C was assessed using fluorescence-assorted cell sorting and spectrophotometric assays. Canonical markers of cell death, including membrane scrambling, oxidative stress, and Ca2+ mobilization, were captured by annexin V-fluorescein isothiocyanate, 2,7-dichlorodihydrofluorescein diacetate, and… More >

  • Open Access

    ARTICLE

    Human chemerin induces eryptosis at concentrations exceeding circulating levels

    MARYNA TKACHENKO1, ANATOLII ONISHCHENKO2, LILIYA TRYFONYUK3, DMYTRO BUTOV4, KATERYNA KOT5, VIKTORIIA NOVIKOVA6, LIWEI FAN5,7, VOLODYMYR PROKOPIUK2,8, YURII KOT5,*, ANTON TKACHENKO2,*

    BIOCELL, Vol.48, No.8, pp. 1197-1208, 2024, DOI:10.32604/biocell.2024.050206 - 02 August 2024

    Abstract Introduction: Human chemerin is an adipokine that regulates chemotaxis, inflammation, and glucose metabolism. In addition, accumulating evidence suggests that chemerin promotes apoptosis, autophagy, and pyroptosis. However, there are no data on its impact on eryptosis. The current study aimed to analyze the effects of human active Glu-Ser chemerin on eryptosis in vitro. Materials and Methods: Human chemerin 0-2-10-50 µg/mL was incubated for 24 h with human erythrocytes (hematocrit 0.4%) obtained from eight healthy individuals. Flow cytometry-based determination of phospholipid scrambling, reactive oxygen species (ROS) production, and intracellular Ca levels was performed. To supplement data on ROS and Ca… More >

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