2. Signaling Pathways
  3. MAPK/ERK Pathway
  4. p38 MAPK

p38 MAPK

p38 MAPK

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The p38 MAPK family consists of highly conserved proline-directed serine-threonine protein kinases that are activated in response to a number many growth factors, cytokines, and chemotactic substances, such as vascular endothelial growth factor (VEGF), fibroblast growth factor (FGF), PDGF, TNF, interleukins, lipopolysaccharide (LPS) and formyl-methionyl-leucyl-phenylalanine (fMLP). It is well known that p38 is involved in inflammation, apoptosis, cardiomyocyte hypertrophy and cell differentiation.

The p38 MAPK family is composed of four proteins: p38α (encoded by the gene Mapk14), p38β (Mapk11), p38γ (Mapk12), and p38δ (Mapk13). Their coding genes have a distinct tissue distribution and they appear differentially expressed, being Mapk14 the most highly expressed. p38 MAPKs are substrates for three MAP2K (MKK6, MKK3, and MKK4). The contribution of each of these MAP2K to p38 MAPKs activation depends on the stimulus and the cell type. The MAP3Ks that lead to p38 MAPKs activation are ASK1, DLK1, TAK1, TAO1, TAO2, TPL2, MLK3, MEKK3, MEKK4, and ZAK1.

p38 MAPK Isoform Specific Products:

p38 MAPK Isoform Comparison
Cat. No. Product Name Effect Purity Chemical Structure
  • HY-P992401
    M802
    		Inhibitor
    M802 is an anti-HER2/CD3 bispecific antibody, with a Kd of 0.578 nM for human HER2 and a Kd of 71.2 nM for human CD3. M802 inhibits the PI3K/AKT and MAPK signaling pathways, suppresses tumor cell proliferation, activates caspase-3, and promotes tumor cell apoptosis (apoptosis). M802 recruits and activates CD3-positive immune cells, mediates cytotoxicity against HER2-positive tumor cells, and induces immune cells to secrete IFN-γ, TNF-α, IL-2 and IL-6. M802 exhibits anti-tumor efficacy in mice with gastric cancer xenografts. M802 can be used in research related to HER2-positive breast cancer, HER2-positive gastric cancer and other cancers. The recommended isotype control is human IgG1 kappa (HY-P99001).
    M802
  • HY-160938
    β-Funaltrexamine
    		Inhibitor
    β-Funaltrexamine (β-FNA) is a blood-brain barrier-permeable, selective and irreversible μ-opioid receptor antagonist with immunomodulatory, anti-inflammatory and neuroprotective activities. β-Funaltrexamine inhibits p38 MAPK and TLR4 signaling by blocking μ-opioid receptors, and reduces the transcriptional activities of NF-κB, AP-1, CREB and Stat. Furthermore, β-Funaltrexamine inhibits iNOS activation and pro-inflammatory microglial polarization, converting microglia to an anti-inflammatory phenotype, thereby downregulating neuroinflammation and ameliorating neuronal degeneration. β-Funaltrexamine is widely applicable to research related to stroke, cerebral ischemia/reperfusion injury and neurodegenerative diseases.
    β-Funaltrexamine
  • HY-50876A
    Daporinad hydrochloride
    		Inhibitor
    Daporinad (FK866) hydrochloride is a non-competitive inhibitor of nicotinamide phosphoribosyltransferase (Nampt), with a Ki value of 0.3 nM. Daporinad hydrochloride depletes NAD+ and ATP levels, inhibits mTORC1 and MAPK/ERK pathways, and activates TFEB to induce autophagy. Daporinad hydrochloride causes the depletion of the endoplasmic reticulum Ca²⁺ pool, ultimately weakening the mitogen-induced Ca²⁺ signal and the activation and function of T cells. Daporinad hydrochloride induces cell cycle arrest and apoptosis, and inhibits cell proliferation. Daporinad hydrochloride can be used for the study of myeloma, liver cancer, and immunosuppression.
    Daporinad hydrochloride
  • HY-118817
    Evariquinone
    		Inhibitor
    Evariquinone is an anthraquinone compound isolated from the endophytic fungus Colletotrichum sp. JS-0367 of mulberry. Evariquinone possesses direct antioxidant activity. It inhibits excessive phosphorylation of the JNK, ERK1/2 and p38 MAPK signaling pathways by suppressing ROS and Ca2+, thereby reducing neuronal apoptosis. Evariquinone can be used to study glutamate excitotoxicity-related neurological disorders (such as Alzheimer's disease, Parkinson's disease, cerebral ischemia, etc.).
    Evariquinone
  • HY-159938
    p38α inhibitor 6
    		Inhibitor
    p38α inhibitor 6 (compound 19) is a p38α inhibitor with the IC50 of 0.68 μM. p38α inhibitor 6 induces cell apoptosis and arrests cell cycle at G0 and G2/M phase. p38α inhibitor 6 decreases the TNF-α concentration as well as increased the expression of tumor suppressor gene p53, Bax/BCL-2 ratio and caspase 3/7.
    p38α inhibitor 6
  • HY-175175
    MAPK-IN-5
    		Inhibitor
    MAPK-IN-5 is a potent MAPK inhibitor with an IC50 of 1.35 μM against HeLa cells. MAPK-IN-5 inhibits HeLa cell proliferation by inducing ROS-mediated DNA damage and mitochondrial apoptosis via the MAPK pathway. MAPK-IN-5 significantly inhibits colony formation, reduces the number of live cells, suppresses cell migration, and causes cell cycle arrest in the G2/M phase in HeLa cells. MAPK-IN-5 can be used for the study of cervical cancer.
    MAPK-IN-5
  • HY-W040045R
    Callistephin chloride (Standard)
    		Inhibitor
    Callistephin (Pelargonidin 3-O-glucoside) chloride (Standard) is the analytical standard of Callistephin chloride (HY-W040045). This product is intended for research and analytical applications. Callistephin chloride is an anthocyanin. Callistephin chloride regulates the expression of inflammatory (reducing iNOS/TNF-α/COX-2) and apoptosis-related proteins by inhibiting p38 phosphorylation, and enhances the protective effect of Isoflurane (HY-A0134) on microglial cell damage. Callistephin chloride significantly reduces ROS levels, eliminates DPPH free radicals, protects retinal pigment epithelial cells, and inhibits lipid peroxidation. Callistephin chloride can alleviate glutamate excitotoxicity, reduce neuronal apoptosis, and protect cerebellar granule neurons. Callistephin chloride can inhibit the proliferation and metastasis of breast cancer cells by inducing apoptosis.
    Callistephin chloride (Standard)
  • HY-E70291
    N-Acetylgalactosaminyltransferase 4
    		Inhibitor
    N-Acetylgalactosaminyltransferase 4 (GALNT4) is a glycosyltransferase capable of inhibiting the activation of ASK1. By directly binding to ASK1, N-Acetylgalactosaminyltransferase 4 suppresses its N-terminal dimerization and subsequent phosphorylation, leading to robust inactivation of downstream JNK/p38 and NF-κB signals, and thereby improving the prognosis of liver surgery.
    N-Acetylgalactosaminyltransferase 4
  • HY-RS08102
    Mapk12 Mouse Pre-designed siRNA Set A
    		Inhibitor

    Mapk12 Mouse Pre-designed siRNA Set A contains three designed siRNAs for Mapk12 gene (Mouse), as well as a negative control, a positive control, and a FAM-labeled negative control.
    Mapk12 Mouse Pre-designed siRNA Set A
  • HY-175429
    p38 MAPK-IN-7
    		Inhibitor
    p38 MAPK-IN-7 (Compound 2) is an orally active, potent and selective p38 MAP kinase inhibitor (IC50=170 nM). p38 MAPK-IN-7 is promising for research of inflammatory diseases such as rheumatoid arthritis and septic shock.
    p38 MAPK-IN-7
  • HY-N7046R
    Silybin B (Standard)
    		Inhibitor
    Silybin (Silibinin B) (Standard) is the analytical standard of Silybin B (HY-N7046). This product is intended for research and analytical applications. Silybin B (Silibinin B) is an orally active amyloid-β aggregation inhibitor and ATR pathway activator, that can cross the blood-brain barrier. Silybin B inhibits Aβ fibril formation and promotes amorphous aggregate formation, while activating the ATR-mediated DNA damage repair pathway and inhibiting JNK/p38 MAPK signaling. Silybin B can reduce Cisplatin (HY-17394)-induced neuronal DNA damage and apoptosis. Silybin B has anti-oxidative stress, cell cycle regulation and neuroprotective activities. Silybin B is mainly used in the study of Alzheimer's disease and Cisplatin chemotherapy-related neurotoxicity.
    Silybin B (Standard)
  • HY-W040971S
    Creosol-d4
    		Inhibitor
    Creosol-d4 (2-Methoxy-4-methylphenol-d4) is the deuterium labeled Creosol (HY-W040971). Creosol (2-Methoxy-4-methylphenol) is an endogenous metabolite that acts as an important chemical intermediate and potential biofuel mainly derived from lignocellulosic biomass. Creosol is blood brain barrier penetrable.
    Creosol-d<sub>4</sub>
  • HY-14974
    R 1487
    		Inhibitor
    R 1487 is an orally active and highly selective p38α mitogen-activated protein kinase inhibitor. R 1487 can be used in the study of rheumatoid arthritis.
    R 1487
  • HY-12358A
    Tpl2 Kinase Inhibitor 1 hydrochloride
    		Inhibitor
    Tpl2 Kinase Inhibitor 1 hydrochloride is a 3-pyridylmethylamino analog, and is a selective Tpl2 inhibitor (IC50=50 nM). Tpl2 consists of COT kinase and MAP3K8. Tpl2 Kinase Inhibitor 1 hydrochloride plays an important role in the regulation of the inflammatory response and the progression of some cancers.
    Tpl2 Kinase Inhibitor 1 hydrochloride
  • HY-12144
    CP-99994
    		Inhibitor
    CP-99994 is a Tachykinin neurokinin 1 (NK-1) receptor antagonist with a Ki of 0.25 nM. CP-99994 prevents colorectal sensitization in the context of visceral hypersensitivity. CP-99994 reduces colorectal hypersensitivity induced by acetic acid injections in a model of bladder-colon cross-sensitization. CP-99994 hydrochloride attenuates the neuroglial interactions and MAPK-p38 phosphorylation associated with visceral hypersensitivity.
    CP-99994
  • HY-W050000R
    OR-1855 (Standard)
    		Inhibitor
    OR-1855 (Standard) is an analytical standard of OR-1855 (HY-W050000). This product is intended for research and analytical applications. OR-1855, an active metabolite of Levosimendan (HY-14286), has effect on myometrial contractility. OR-1855 exerts anti-inflammatory effects by inhibiting IL-1β-induced ROS formation and NAD(P)H oxidase-dependent superoxide radical generation in HUVECs. OR-1855 inhibits IL-1β-induced phosphorylation p38 MAPK, ERK1/2, c-Jun and JNK in HUVECs. OR-1855 can be used for the study of inflammation.
    OR-1855 (Standard)
  • HY-167877
    PS-166276
    		Inhibitor
    PS-166276 is a highly potent and less cytotoxic inhibitor of p38. PS166276 has an IC50 of 28 nM at p38 kinase and 170 nM in the THP-1 TNFα assay.
    PS-166276
  • HY-116474R
    Viridicatol (Standard)
    		Inhibitor
    Viridicatol (Standard) is the analytical standard of Viridicatol (HY-116474). This product is intended for research and analytical applications. Viridicatol is a quinolone alkaloid with anti-inflammatory, antibacterial, antifungal, osteogenic and chondrogenic activities. Viridicatol reduces the phosphorylation levels of ERK, JNK, p38 and STAT6; inhibits MMP-2, MMP-9, NF-κB signaling pathway and PTP1B; downregulates genes related to mast cell activation; and binds to SHN3 to activate the Wnt/SHN3 signaling pathway. Viridicatol inhibits the expression of pro-inflammatory mediators and cytokines, and promotes osteogenic/chondrogenic differentiation. Viridicatol can be used in studies related to fibrosarcoma, allergy, bacterial infection, fungal infection and osteoporosis.
    Viridicatol (Standard)
  • HY-183042
    p38α-IN-12
    		Inhibitor
    p38α-IN-12 is an orally bioavailable p38α MAPK inhibitor, with an IC50 of 0.11 nM and a Ki of 0.2 nM against human targets. p38α-IN-12 inhibits the production of TNFα in cellular systems and exerts in vivo efficacy in acute mouse models.
    p38α-IN-12
  • HY-171292
    CK1δ-IN-9
    		Inhibitor
    CK1δ-IN-9 (Compound 8) is the inhibitor for casein kinase 1 that inhibits CK1δ with IC50 of 1.4 nM. CK1δ-IN-9 inhibits p38α and p38β with IC50 of 0.25 μM and 0.78 μM. CK1δ-IN-9 exhibits pharmacokinetic characteristics with a good oral bioavailability (70%) and a moderate clearance.
    CK1δ-IN-9
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity
p38 MAPK Isoform Comparison

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