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BBR684 attenuates Erastin-induced ferroptosis in HK-2 cells by suppressing lipid peroxidation and activating the antioxidant response. (A) Flow cytometric analysis of lipid peroxidation using the C11-BODIPY probe in HK-2 cells treated as indicated for 12 hours. Data are presented as mean fluorescence intensity (MFI). (B) Intracellular Fe²⁺ levels measured by a ferrous iron colorimetric assay. (C, D) Levels of malondialdehyde (MDA, C) and reduced glutathione (GSH, D) in cell lysates. (E, F) Representative immunofluorescence images (E) and quantification (F) of 4-hydroxynonenal (4-HNE) adducts (red) in HK-2 cells. Nuclei were counterstained with DAPI (blue). Scale bar, 50 µm. (G) Western blot analysis of key ferroptosis-related proteins: glutathione peroxidase 4 (GPX4), heme oxygenase-1 <t>(HO-1),</t> and nuclear factor erythroid 2–related factor 2 (NRF2). β-actin served as the loading control. Data are from 3 independent biological replicates (n = 3) and presented as mean ± SEM. Significance was determined by one-way ANOVA followed by Tukey's HSD post hoc test. * P < 0.05, ** P < 0.01, *** P < 0.001; n.s., not significant.
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BBR684 attenuates Erastin-induced ferroptosis in HK-2 cells by suppressing lipid peroxidation and activating the antioxidant response. (A) Flow cytometric analysis of lipid peroxidation using the C11-BODIPY probe in HK-2 cells treated as indicated for 12 hours. Data are presented as mean fluorescence intensity (MFI). (B) Intracellular Fe²⁺ levels measured by a ferrous iron colorimetric assay. (C, D) Levels of malondialdehyde (MDA, C) and reduced glutathione (GSH, D) in cell lysates. (E, F) Representative immunofluorescence images (E) and quantification (F) of 4-hydroxynonenal (4-HNE) adducts (red) in HK-2 cells. Nuclei were counterstained with DAPI (blue). Scale bar, 50 µm. (G) Western blot analysis of key ferroptosis-related proteins: <t>glutathione</t> <t>peroxidase</t> <t>4</t> <t>(GPX4),</t> heme oxygenase-1 (HO-1), and nuclear factor erythroid 2–related factor 2 (NRF2). β-actin served as the loading control. Data are from 3 independent biological replicates (n = 3) and presented as mean ± SEM. Significance was determined by one-way ANOVA followed by Tukey's HSD post hoc test. * P < 0.05, ** P < 0.01, *** P < 0.001; n.s., not significant.
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BBR684 attenuates Erastin-induced ferroptosis in HK-2 cells by suppressing lipid peroxidation and activating the antioxidant response. (A) Flow cytometric analysis of lipid peroxidation using the C11-BODIPY probe in HK-2 cells treated as indicated for 12 hours. Data are presented as mean fluorescence intensity (MFI). (B) Intracellular Fe²⁺ levels measured by a ferrous iron colorimetric assay. (C, D) Levels of malondialdehyde (MDA, C) and reduced glutathione (GSH, D) in cell lysates. (E, F) Representative immunofluorescence images (E) and quantification (F) of 4-hydroxynonenal (4-HNE) adducts (red) in HK-2 cells. Nuclei were counterstained with DAPI (blue). Scale bar, 50 µm. (G) Western blot analysis of key ferroptosis-related proteins: <t>glutathione</t> <t>peroxidase</t> <t>4</t> <t>(GPX4),</t> heme oxygenase-1 (HO-1), and nuclear factor erythroid 2–related factor 2 (NRF2). β-actin served as the loading control. Data are from 3 independent biological replicates (n = 3) and presented as mean ± SEM. Significance was determined by one-way ANOVA followed by Tukey's HSD post hoc test. * P < 0.05, ** P < 0.01, *** P < 0.001; n.s., not significant.
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BBR684 attenuates Erastin-induced ferroptosis in HK-2 cells by suppressing lipid peroxidation and activating the antioxidant response. (A) Flow cytometric analysis of lipid peroxidation using the C11-BODIPY probe in HK-2 cells treated as indicated for 12 hours. Data are presented as mean fluorescence intensity (MFI). (B) Intracellular Fe²⁺ levels measured by a ferrous iron colorimetric assay. (C, D) Levels of malondialdehyde (MDA, C) and reduced glutathione (GSH, D) in cell lysates. (E, F) Representative immunofluorescence images (E) and quantification (F) of 4-hydroxynonenal (4-HNE) adducts (red) in HK-2 cells. Nuclei were counterstained with DAPI (blue). Scale bar, 50 µm. (G) Western blot analysis of key ferroptosis-related proteins: <t>glutathione</t> <t>peroxidase</t> <t>4</t> <t>(GPX4),</t> heme oxygenase-1 (HO-1), and nuclear factor erythroid 2–related factor 2 (NRF2). β-actin served as the loading control. Data are from 3 independent biological replicates (n = 3) and presented as mean ± SEM. Significance was determined by one-way ANOVA followed by Tukey's HSD post hoc test. * P < 0.05, ** P < 0.01, *** P < 0.001; n.s., not significant.
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BBR684 attenuates Erastin-induced ferroptosis in HK-2 cells by suppressing lipid peroxidation and activating the antioxidant response. (A) Flow cytometric analysis of lipid peroxidation using the C11-BODIPY probe in HK-2 cells treated as indicated for 12 hours. Data are presented as mean fluorescence intensity (MFI). (B) Intracellular Fe²⁺ levels measured by a ferrous iron colorimetric assay. (C, D) Levels of malondialdehyde (MDA, C) and reduced glutathione (GSH, D) in cell lysates. (E, F) Representative immunofluorescence images (E) and quantification (F) of 4-hydroxynonenal (4-HNE) adducts (red) in HK-2 cells. Nuclei were counterstained with DAPI (blue). Scale bar, 50 µm. (G) Western blot analysis of key ferroptosis-related proteins: <t>glutathione</t> <t>peroxidase</t> <t>4</t> <t>(GPX4),</t> heme oxygenase-1 (HO-1), and nuclear factor erythroid 2–related factor 2 (NRF2). β-actin served as the loading control. Data are from 3 independent biological replicates (n = 3) and presented as mean ± SEM. Significance was determined by one-way ANOVA followed by Tukey's HSD post hoc test. * P < 0.05, ** P < 0.01, *** P < 0.001; n.s., not significant.
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BBR684 attenuates Erastin-induced ferroptosis in HK-2 cells by suppressing lipid peroxidation and activating the antioxidant response. (A) Flow cytometric analysis of lipid peroxidation using the C11-BODIPY probe in HK-2 cells treated as indicated for 12 hours. Data are presented as mean fluorescence intensity (MFI). (B) Intracellular Fe²⁺ levels measured by a ferrous iron colorimetric assay. (C, D) Levels of malondialdehyde (MDA, C) and reduced glutathione (GSH, D) in cell lysates. (E, F) Representative immunofluorescence images (E) and quantification (F) of 4-hydroxynonenal (4-HNE) adducts (red) in HK-2 cells. Nuclei were counterstained with DAPI (blue). Scale bar, 50 µm. (G) Western blot analysis of key ferroptosis-related proteins: <t>glutathione</t> <t>peroxidase</t> <t>4</t> <t>(GPX4),</t> heme oxygenase-1 (HO-1), and nuclear factor erythroid 2–related factor 2 (NRF2). β-actin served as the loading control. Data are from 3 independent biological replicates (n = 3) and presented as mean ± SEM. Significance was determined by one-way ANOVA followed by Tukey's HSD post hoc test. * P < 0.05, ** P < 0.01, *** P < 0.001; n.s., not significant.
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BBR684 attenuates Erastin-induced ferroptosis in HK-2 cells by suppressing lipid peroxidation and activating the antioxidant response. (A) Flow cytometric analysis of lipid peroxidation using the C11-BODIPY probe in HK-2 cells treated as indicated for 12 hours. Data are presented as mean fluorescence intensity (MFI). (B) Intracellular Fe²⁺ levels measured by a ferrous iron colorimetric assay. (C, D) Levels of malondialdehyde (MDA, C) and reduced glutathione (GSH, D) in cell lysates. (E, F) Representative immunofluorescence images (E) and quantification (F) of 4-hydroxynonenal (4-HNE) adducts (red) in HK-2 cells. Nuclei were counterstained with DAPI (blue). Scale bar, 50 µm. (G) Western blot analysis of key ferroptosis-related proteins: glutathione peroxidase 4 (GPX4), heme oxygenase-1 (HO-1), and nuclear factor erythroid 2–related factor 2 (NRF2). β-actin served as the loading control. Data are from 3 independent biological replicates (n = 3) and presented as mean ± SEM. Significance was determined by one-way ANOVA followed by Tukey's HSD post hoc test. * P < 0.05, ** P < 0.01, *** P < 0.001; n.s., not significant.

Journal: Current Therapeutic Research, Clinical and Experimental

Article Title: The Berberine Derivative BBR684 Inhibits VDAC Oligomerization to Suppress Ferroptosis in Acute Kidney Injury

doi: 10.1016/j.curtheres.2026.100825

Figure Lengend Snippet: BBR684 attenuates Erastin-induced ferroptosis in HK-2 cells by suppressing lipid peroxidation and activating the antioxidant response. (A) Flow cytometric analysis of lipid peroxidation using the C11-BODIPY probe in HK-2 cells treated as indicated for 12 hours. Data are presented as mean fluorescence intensity (MFI). (B) Intracellular Fe²⁺ levels measured by a ferrous iron colorimetric assay. (C, D) Levels of malondialdehyde (MDA, C) and reduced glutathione (GSH, D) in cell lysates. (E, F) Representative immunofluorescence images (E) and quantification (F) of 4-hydroxynonenal (4-HNE) adducts (red) in HK-2 cells. Nuclei were counterstained with DAPI (blue). Scale bar, 50 µm. (G) Western blot analysis of key ferroptosis-related proteins: glutathione peroxidase 4 (GPX4), heme oxygenase-1 (HO-1), and nuclear factor erythroid 2–related factor 2 (NRF2). β-actin served as the loading control. Data are from 3 independent biological replicates (n = 3) and presented as mean ± SEM. Significance was determined by one-way ANOVA followed by Tukey's HSD post hoc test. * P < 0.05, ** P < 0.01, *** P < 0.001; n.s., not significant.

Article Snippet: Antibodies against GPX4 (Catalog #3F5G5), HO-1 (Catalog #10701-1-AP), NRF2 (Catalog #16396-1-AP), VDAC (Catalog #10866-1-AP), Cleaved Caspase-3 (Catalog #68773-1-Ig), and CD45 (Catalog #98035-1-RR) were purchased from Proteintech.

Techniques: Fluorescence, Colorimetric Assay, Immunofluorescence, Western Blot, Control

BBR684 attenuates Erastin-induced ferroptosis in HK-2 cells by suppressing lipid peroxidation and activating the antioxidant response. (A) Flow cytometric analysis of lipid peroxidation using the C11-BODIPY probe in HK-2 cells treated as indicated for 12 hours. Data are presented as mean fluorescence intensity (MFI). (B) Intracellular Fe²⁺ levels measured by a ferrous iron colorimetric assay. (C, D) Levels of malondialdehyde (MDA, C) and reduced glutathione (GSH, D) in cell lysates. (E, F) Representative immunofluorescence images (E) and quantification (F) of 4-hydroxynonenal (4-HNE) adducts (red) in HK-2 cells. Nuclei were counterstained with DAPI (blue). Scale bar, 50 µm. (G) Western blot analysis of key ferroptosis-related proteins: glutathione peroxidase 4 (GPX4), heme oxygenase-1 (HO-1), and nuclear factor erythroid 2–related factor 2 (NRF2). β-actin served as the loading control. Data are from 3 independent biological replicates (n = 3) and presented as mean ± SEM. Significance was determined by one-way ANOVA followed by Tukey's HSD post hoc test. * P < 0.05, ** P < 0.01, *** P < 0.001; n.s., not significant.

Journal: Current Therapeutic Research, Clinical and Experimental

Article Title: The Berberine Derivative BBR684 Inhibits VDAC Oligomerization to Suppress Ferroptosis in Acute Kidney Injury

doi: 10.1016/j.curtheres.2026.100825

Figure Lengend Snippet: BBR684 attenuates Erastin-induced ferroptosis in HK-2 cells by suppressing lipid peroxidation and activating the antioxidant response. (A) Flow cytometric analysis of lipid peroxidation using the C11-BODIPY probe in HK-2 cells treated as indicated for 12 hours. Data are presented as mean fluorescence intensity (MFI). (B) Intracellular Fe²⁺ levels measured by a ferrous iron colorimetric assay. (C, D) Levels of malondialdehyde (MDA, C) and reduced glutathione (GSH, D) in cell lysates. (E, F) Representative immunofluorescence images (E) and quantification (F) of 4-hydroxynonenal (4-HNE) adducts (red) in HK-2 cells. Nuclei were counterstained with DAPI (blue). Scale bar, 50 µm. (G) Western blot analysis of key ferroptosis-related proteins: glutathione peroxidase 4 (GPX4), heme oxygenase-1 (HO-1), and nuclear factor erythroid 2–related factor 2 (NRF2). β-actin served as the loading control. Data are from 3 independent biological replicates (n = 3) and presented as mean ± SEM. Significance was determined by one-way ANOVA followed by Tukey's HSD post hoc test. * P < 0.05, ** P < 0.01, *** P < 0.001; n.s., not significant.

Article Snippet: Antibodies against GPX4 (Catalog #3F5G5), HO-1 (Catalog #10701-1-AP), NRF2 (Catalog #16396-1-AP), VDAC (Catalog #10866-1-AP), Cleaved Caspase-3 (Catalog #68773-1-Ig), and CD45 (Catalog #98035-1-RR) were purchased from Proteintech.

Techniques: Fluorescence, Colorimetric Assay, Immunofluorescence, Western Blot, Control