hif 1α inhibitor bay  (MedChemExpress)

Journal: Frontiers in Immunology

Article Title: GDF15 orchestrates mitochondrial-immune crosstalk via SMAD7-HIF-1α-PKM2 cascade to attenuate septic liver injury

doi: 10.3389/fimmu.2025.1712741

Figure Lengend Snippet: GDF15 preserves mitochondrial homeostasis in LPS-stimulated macrophages through dual regulation of SMAD7 and PKM2 pathways. (A) HIF-1α and SMAD7 expression in RAW264.7 macrophages across conditions: Untreated, LPS, LPS with rAAV8-mGdf15 overexpression (LPS+GDF15), and LPS with GDF15 knockdown (si-GDF15). β-actin: loading control.(HIF-1α suppression and SMAD7 induction by GDF15.) (B) Cytosolic and nuclear PKM2 protein levels. Lamin B1 (nuclear) and α-tubulin (cytosolic) markers validate fractionation efficiency. Study groups and individual replicates are identified in the figure key.(PKM2 subcellular redistribution modulated by GDF15.) (C) Immunofluorescence of PKM2 (red) and nuclei (DAPI, blue). Arrows indicate nuclear PKM2 accumulation. Scale bar: 15 μm.(Nuclear PKM2 enrichment upon LPS challenge mitigated by GDF15 and exacerbated by GDF15 knockdown.).

Article Snippet: Pharmacological agents included: HIF-1α inhibitor BAY 87-2243 [MedChemExpress, CAS 1227158-85-1; a potent and selective inhibitor of mitochondrial complex I that effectively suppresses HIF-1α protein accumulation under normoxic and hypoxic conditions ( )], PKM2 inhibitor Shikonin [MedChemExpress, CAS 54952-43-1; a specific inhibitor that binds to the PKM2 subunit, suppressing its enzymatic activity and nuclear translocation, with well-documented anti-inflammatory effects ( )], and SMAD7 activator Asiaticoside (MedChemExpress, 16830-15-2; a triterpenoid compound known to upregulate SMAD7 expression and ameliorate inflammation in macrophage models ( )).

Techniques: Expressing, Over Expression, Knockdown, Control, Fractionation, Immunofluorescence

Journal: Frontiers in Immunology

Article Title: GDF15 orchestrates mitochondrial-immune crosstalk via SMAD7-HIF-1α-PKM2 cascade to attenuate septic liver injury

doi: 10.3389/fimmu.2025.1712741

Figure Lengend Snippet: HIF-1α and PKM2 are critical effectors of GDF15-driven mitochondrial protection and anti-inflammatory responses. (A) HIF-1α inhibition by BAY 87-2243 (5 μM, 24 h). β-actin: loading control.(Pharmacological HIF-1α blockade.) (B) PKM2 inhibition by Shikonin (2 μM, 24 h). β-actin: loading control.(PKM2 activity suppression.) (C) UQCRC1 recovery in LPS-injured macrophages treated with: GDF15 overexpression, HIF-1α inhibitor (BAY), or PKM2 inhibitor (Shikonin). β-actin: loading control.(Mitochondrial complex III rescue via HIF-1α/PKM2 inhibition mirrors GDF15 effects.) (D) Inflammatory (TNF-α, IL-6) and metabolic (lactate) markers in cell supernatant (n = 5). Study groups and individual replicates are identified in the figure key. ***p < 0.001.(HIF-1α/PKM2 targeting replicates GDF15-mediated anti-inflammatory and metabolic homeostasis.) (E) UQCRC1 expression under GDF15 loss-of-function: si-GDF15 alone vs. combined with BAY 87–2243 or Shikonin. β-actin: loading control. Study groups and individual replicates are identified in the figure key.(Mitochondrial rescue in GDF15-deficient macrophages requires HIF-1α/PKM2 inhibition.) (F) Supernatant cytokines and lactate in si-GDF15 macrophages with/without inhibitors (n = 5). ***p < 0.001. (Inflammation reversal in GDF15-knockdown macrophages depends on HIF-1α/PKM2 blockade.).

Article Snippet: Pharmacological agents included: HIF-1α inhibitor BAY 87-2243 [MedChemExpress, CAS 1227158-85-1; a potent and selective inhibitor of mitochondrial complex I that effectively suppresses HIF-1α protein accumulation under normoxic and hypoxic conditions ( )], PKM2 inhibitor Shikonin [MedChemExpress, CAS 54952-43-1; a specific inhibitor that binds to the PKM2 subunit, suppressing its enzymatic activity and nuclear translocation, with well-documented anti-inflammatory effects ( )], and SMAD7 activator Asiaticoside (MedChemExpress, 16830-15-2; a triterpenoid compound known to upregulate SMAD7 expression and ameliorate inflammation in macrophage models ( )).

Techniques: Inhibition, Control, Activity Assay, Over Expression, Expressing, Knockdown

Journal: Frontiers in Immunology

Article Title: GDF15 orchestrates mitochondrial-immune crosstalk via SMAD7-HIF-1α-PKM2 cascade to attenuate septic liver injury

doi: 10.3389/fimmu.2025.1712741

Figure Lengend Snippet: SMAD7 activation suppresses HIF-1α to mediate GDF15-dependent mitochondrial protection in LPS-challenged macrophages. (A) Pharmacological SMAD7 activation by Asiaticoside (20 μM, 48 h). β-actin: loading control. (B) HIF-1α expression under LPS challenge: LPS alone, LPS + AVV-GDF15, or LPS + SMAD7 activation (Asiaticoside). β-actin: loading control. (C) HIF-1α modulation across conditions: LPS, LPS + si-GDF15, LPS + Asiaticoside, or LPS + si-GDF15 + Asiaticoside. β-actin: loading control.

Article Snippet: Pharmacological agents included: HIF-1α inhibitor BAY 87-2243 [MedChemExpress, CAS 1227158-85-1; a potent and selective inhibitor of mitochondrial complex I that effectively suppresses HIF-1α protein accumulation under normoxic and hypoxic conditions ( )], PKM2 inhibitor Shikonin [MedChemExpress, CAS 54952-43-1; a specific inhibitor that binds to the PKM2 subunit, suppressing its enzymatic activity and nuclear translocation, with well-documented anti-inflammatory effects ( )], and SMAD7 activator Asiaticoside (MedChemExpress, 16830-15-2; a triterpenoid compound known to upregulate SMAD7 expression and ameliorate inflammation in macrophage models ( )).

Techniques: Activation Assay, Control, Expressing

Journal: Frontiers in Pharmacology

Article Title: Effects and mechanisms of 6-hydroxykaempferol 3,6- di - O -glucoside-7- O -glucuronide from Safflower on endothelial injury in vitro and on thrombosis in vivo

doi: 10.3389/fphar.2022.974216

Figure Lengend Snippet: Effects of Lw6 (a HIF-1α inhibitor) and BAY11-7082 (a NFκB inhibitor) on OGD/R induced inflammation in HUVECs. The cell viability, expression of pro-inflammatory cytokines, and Western blot analysis of OGD/R-treated HUVECs in the presence or absence of HGG. (A) Cell viability of HUVECs determined by MTT assay. (B) Apoptosis assay with hochest-33342 staining, Scale bar = 100 μm. (C) The protein expression levels of p-NF-κB and NF-κB were determined using Western blot analysis. (D) The relative expression of p-NF-κB/NF-κB in HUVECs after OGD/R. (E) Concentration of IL-6 in the cell supernatants was measured by Elisa kits. RT-qPCR was performed to assess the expression of pro-inflammatory cytokines including (F) IL-6 , (G) IL-1β , and (H) TNF-α . Data are presented as means ± SD ( n = 3), ## p < 0.01 vs. Control; * p < 0.05, ** p < 0.01 vs. OGD/R.

Article Snippet: NF-κB inhibitor BAY11-7082, and HIF-1α inhibitor Lw6 were purchased from selleck Chemicals (Selleck, Shanghai, China).

Techniques: Expressing, Western Blot, MTT Assay, Apoptosis Assay, Staining, Concentration Assay, Enzyme-linked Immunosorbent Assay, Quantitative RT-PCR, Control