KH176m
KH176m is the major active metabolite of KH176 (HY-121577). KH176m is a microsomal prostaglandin E synthase-1 (mPGES-1) inhibitor that can cross the blood-brain barrier, with an IC50 of 0.16 µM against mouse mPGES-1 and 1.51 µM against human mPGES-1. KH176m blocks LPS- or IL-1β-induced PGE2 production, scavenges ROS, inhibits lipid peroxidation, accelerates NADPH consumption, suppresses the growth of prostate cancer spheroids, reduces the CD44+ CD24− prostate cancer stem cell population, and protects fibroblasts with oxidative phosphorylation defects from redox stress-induced death. KH176m can be used in research related to mitochondrial diseases, inflammatory pain, inflammatory neurological diseases, inflammatory cancers, and prostate cancer.
For research use only. We do not sell to patients.
- CAS No.: 2095304-61-1
- Formula: C19H28N2O4
- Molecular Weight:348.44
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Storage:
Please store the product under the recommended conditions in the Certificate of Analysis.
Biological Activity
Description
IC50 & Target
[1]|
mmPGES-1 0.16 μM (IC50) |
hmPGES-1 1.51 μM (IC50) |
In Vitro
KH176m (1 μM; 24 h) selectively reduces elevated levels of PGE2, PGE1, and PGA2 in primary human dermal fibroblasts from patients with mitochondrial complex I deficiency, without altering levels of PGD2 or PGF2α[1].
KH176m (72 h) dose-dependently reduces PGE2 levels in primary human skin fibroblasts from patients with mitochondrial complex I deficiency, with an IC50 of 85.3 nM[1].
KH176m (24 h) dose-dependently and selectively inhibits LPS (HY-D1056)-induced PGE2 production in primary human dermal fibroblasts from healthy donors and RAW264.7 cells, with IC50 values of 92.9 nM and 0.56 nM, respectively, without altering PGD2 levels[1].
KH176m (24 h) dose-dependently and selectively inhibits IL-1β-induced PGE2 production in primary dermal fibroblasts from healthy humans, with an IC50 of 0.28 μM after 24 h of incubation, without altering the level of PGD2[1].
KH176m (15 min) inhibits the enzymatic activity of mPGES-1 in lipopolysaccharide (LPS)-stimulated mouse macrophage-like RAW264.7 cells and microsomes of healthy primary human dermal fibroblasts, with IC50 values of 0.16 μM and 1.51 μM, respectively[1].
KH176m (1-10 μM; 6-24 h) dose-dependently inhibits the expression of mPGES-1 protein and mRNA in LPS- and IL-1β-induced mouse macrophage-like RAW264.7 cells, without altering the expression of COX-2, mPGES-2, cPGES or COX-1[1].
KH176m (0.62-5 µM; 2 min injection, 4 min dissociation) binds directly to purified recombinant human Prdx2 with a KD value of 0.305 µM, whereas KH176 shows no dose-dependent binding to Prdx2[3].
KH176m (1-10 μM; 24 h) dose-dependently reduces the expression of constitutive mPGES-1 protein in two-dimensionally cultured DU145 human prostate cancer cells and induces a decrease in spheroid size[2].
KH176m (0.3-3 μM; 7 days) dose-dependently reduces the sphere size and mPGES-1 mRNA expression of CD44+ CD24− cancer stem cells isolated from DU145 human prostate cancer cells cultured in Matrigel or ultra-low attachment plates for 7 days[2].
KH176m (0.3-3 μM; 7 days) reduces the proportion of CD44+ CD24− cancer stem cells in Matrigel-cultured human prostate cancer DU145 spheroids in a dose-dependent manner[2].
KH176m (3.2-88 nM; 24 h) potently protects complex I-deficient P4 primary human skin fibroblasts and a variety of other oxidative phosphorylation (OXPHOS)-deficient primary human skin fibroblasts against BSO (HY-106376)-induced death, with an EC50 value as low as 3.2 nM[3].
KH176m (255 nM; 24 h) potently reduces ROS levels in complex I-deficient P4 primary human skin fibroblasts, with an IC50 of 255 nM[3].
KH176m (3 µM) effectively scavenges hydrogen peroxide and superoxide anion in complex I-deficient P4 primary human skin fibroblasts[3].
KH176m (24 h) potently reduces the basal cytoplasmic superoxide level in complex I-deficient P4 primary human skin fibroblasts, with an EC50 of 1.7 µM[3].
KH176m (30 min) potently inhibits cumene hydroperoxide-induced lipid peroxidation in complex I-deficient P4 primary human skin fibroblasts, with an IC50 of 0.71 µM[3].
KH176m (30 min) potently reduces mitochondrial superoxide levels in complex I-deficient P4 primary human skin fibroblasts, with an IC50 of 14 µM[3].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
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Cell Line:LPS-stimulated mouse macrophage-like RAW264.7 cells
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Concentration:1, 3, 10 μM
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Incubation Time:6 h (LPS stimulation); 24 h (LPS stimulation)
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Result:Dose-dependently reduced LPS-induced mPGES-1 expression at both protein and mRNA levels.
Left expression of COX-2, mPGES-2, cPGES, and COX-1 unchanged.
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Cell Line:IL-1β-stimulated primary human skin fibroblasts (healthy controls) with exogenous PGE2 supplementation
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Concentration:3 μM
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Incubation Time:24 h
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Result:Inhibited IL-1β-induced mPGES-1 protein and mRNA expression.
Had its inhibitory effect reversed by supplementation with exogenous PGE2.
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Cell Line:human prostate cancer DU145 cell line (2D culture)
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Concentration:1, 3, 10 μM
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Incubation Time:24 h
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Result:Reduced constitutive mPGES-1 protein expression in a dose-dependent manner.
Caused statistically significant reductions relative to vehicle at 3 μM and 10 μM.
Chemical Information
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CAS No. 2095304-61-1
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Molecular Weight 348.44
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Formula C19H28N2O4
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SMILES
C(C[C@](C(N[C@@H]1CCCNC1)=O)(C)O)C2=C(C)C(=O)C(C)=C(C)C2=O
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
Please store the product under the recommended conditions in the Certificate of Analysis.
Purity & Documentation
References
[1]. Jiang X, et al. Mechanism of action and potential applications of selective inhibition of microsomal prostaglandin E synthase-1-mediated PGE2 biosynthesis by sonlicromanol's metabolite KH176m. Sci Rep. 2021 Jan 13;11(1):880. [Content Brief]
[2]. Jiang X, et al. Sonlicromanol's active metabolite KH176m normalizes prostate cancer stem cell mPGES-1 overexpression and inhibits cancer spheroid growth. PloS one. 2021;16(7):e0254315. [Content Brief]
[3]. Beyrath J, et al. KH176 Safeguards Mitochondrial Diseased Cells from Redox Stress-Induced Cell Death by Interacting with the Thioredoxin System/Peroxiredoxin Enzyme Machinery. Scientific reports. 2018 Apr 26;8(1):6577. [Content Brief]
Calculators
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
Keywords
- KH176m
- 2095304-61-1
- PGE synthase
- Reactive Oxygen Species (ROS)
- microsomal prostaglandin E synthase-1
- DU145 human prostate cancer cells
- primary human skin fibroblasts
- LNCaP human prostate cancer cells
- prostate cancer stem cells
- mPGES-1
- RAW264.7 cells
- peroxiredoxin
- mitochondrial complex I-deficient patients
- reactive oxygen species
- Inhibitor
- inhibitor
- inhibit