Catalog No.S1494

LY2228820 Chemical Structure

Molecular Weight(MW): 612.74

LY2228820 is a novel and potent inhibitor of p38 MAPK with IC50 of 7 nM in a cell-free assay, does not alter p38 MAPK activation. Phase 1/2.

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5 Customer Reviews

  • CD34 expression after 14 days of culture of CB CB CD34+ cells treated with the P38α inhibitor Ly2228820 or vehicle (DMSO; n=3). Error bars represent SEM.

    Blood 2012 119, 6255-8. LY2228820 purchased from Selleck.

    Cell cycle phase distributions were determined on U87EV and U87PTEN cell treated with B, +/- rapamycin and +/- LY2228820 as shown. Percent apoptotic cells as determined via annexin V staining is also shown below each graph. D were identical to B, except LN229MER-AKT and LN229EV cells induced with 4OHT were used.

    Mol Cancer Ther 2011 10, 2244-56. LY2228820 purchased from Selleck.

  • Cells were treated with 100-mU/mL bTSH with or without 1μM LY2228820. After 5 days, OPN expression (C) was determined by RT-qPCR. OPN secretion was determined by ELISA in cell culture medium. The bars represent the mean ± SEM of 3 experiments with at least 2 biological replicates.

    Endocrinology, 2016, 157(5):2173-81. LY2228820 purchased from Selleck.

    Relationship of JNK, p38 MAPK, and PI3K activation in TNF-α-induced signaling. Western blot analysis of the effect of another p38 MAPK inhibitor, LY2228820, on TNF-α signaling. HUVECs were pretreated with LY2228820 (10 umol/L) or wortmannin (1 umol/L) for 1 h, followed by stimulation with TNF-α (5 ng/mL) for 15 min (n=2).

    Acta Pharmacol Sin 2014 35, 339-50. LY2228820 purchased from Selleck.

  • For MTT assays, cells (2,000 ~ 5,000 cells/well) were subcultured into 96-well plates according to their growth properties. Cell proliferation was assayed at 72 hr after treatment of LY2228820 by adding 20 μl of 5 mg/ml 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) solution per 100 μl of growth medium. After incubating for 3-4 h at 37°C, the media were removed and 150 µl/well of MTT solvent (either absolute DMSO or isopropanol containing 4 mM HCl and 0.1% Nonidet-40) was added to dissolve the formazan. The absorbance of each well was measured by ELx808 (BioTek, Winooski, VT) or Wallac Victor2 (Perkin-Elmer Life Sciences, Boston, MA) Microplate Reader. Viable cells are presented as percent of control, vehicle-treated cells.

    Dr. Yong-Weon Yi from Georgetown University Medical Center. LY2228820 purchased from Selleck.

Purity & Quality Control

Choose Selective p38 MAPK Inhibitors

Biological Activity

Description LY2228820 is a novel and potent inhibitor of p38 MAPK with IC50 of 7 nM in a cell-free assay, does not alter p38 MAPK activation. Phase 1/2.
p38α [1]
(Cell-free assay)
7 nM
In vitro

LY2228820 inhibits p38α, as well as the level of phosphoMAPKAPK-2 (pMK2) in RAW 264.7 cells, with IC50 values of 7 nM and 34.3 nM, respectively. Furthermore, LY2228820 inhibits lipopolysaccharide (LPS)-induced TNFα formation in murine peritoneal macrophages, with IC50 of 5.2 nM. [1] In multiple myeloma (MM) cells, including INA6, RPMI-8226, U266, and RPMI-Dox40, LY2228820 (200 nM–800 nM) significantly blocks p38MAPK signaling, as revealed by its inhibition on phosphorylation of HSP27, a downstream target of p38MAPK, without affecting the expression level of HSP27. LY2228820 (200 nM–400 nM) enhances bortezomib-induced cytotoxicity and apoptosis, but LY2228820 alone doesn't inhibit the growth of MM.1S cells. LY2228820 (200 nM–800 nM) also inhibits secretion of IL-6 and MIP-1α in long-term BM stromal cells (LT-BMSCs), BM mononuclear cells (BMMNCs), peripheral blood (PB) CD138+, CD138 or PB CD14+ cells. LY2228820 (400 nM–800 nM) also blocks osteoclastogenesis from CD14+ cells. [2]

Cell Data
Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
RPMI-8226 MXTLbY5ie2ViYYPzZZk> MljtglgxOCCwTR?= NGTMZmVFVVOR NIj0XHdqdmirYnn0d{BxcG:|cHjvdplt[XSrb36gc4YhUFOSMke= NIr6foUyQDN7N{O0OS=>
U266 M2\ZbmtqdmG|ZTDhd5NigQ>? MVf+PFAxKG6P MXrEUXNQ MUXpcohq[mm2czDwbI9{eGixconsZZRqd25ib3[gTHNROjd? NHnMWWEyQDN7N{O0OS=>
MM.1S NXXPTot{U2mwYYPlJIF{e2G7 NXnPSFIzhjhyMDDuUS=> NIPnNmhFVVOR NEXWfGxqdmirYnn0d{BxcG:|cHjvdplt[XSrb36gc4YhUFOSMke= NI\TUFIyQDN7N{O0OS=>
RPMI-Dox40 MoH0T4lv[XOnIHHzd4F6 NH\BUYl,QDByIH7N M3foSGROW09? MlnnbY5pcWKrdIOgdIhwe3Cqb4L5cIF1cW:wIH;mJGhUWDJ5 M3W4VFE5Ozl5M{S1
RPMI-LR5 M176OGtqdmG|ZTDhd5NigQ>? NFnJXnN,QDByIH7N Mo\qSG1UVw>? MkTUbY5pcWKrdIOgdIhwe3Cqb4L5cIF1cW:wIH;mJGhUWDJ5 NHvUeGIyQDN7N{O0OS=>
INA-6 MlX1T4lv[XOnIHHzd4F6 MlrEglgxOCCwTR?= NEPPd45FVVOR NWLmZWE1cW6qaXLpeJMheGixc4Doc5J6dGG2aX;uJI9nKEiVUEK3 MnT5NVg{QTd|NEW=
RPMI-8226 NXTXe|hzS3m2b4jpZ4l1gSCjc4PhfS=> NHnDZpR,OTByMDDuUS=> M{PQPWROW09? M{X4UI5wKHOrZ37p[olk[W62IHP5eI91d3irY3n0fS=> MYGxPFM6PzN2NR?=
U266 MWfDfZRwgGmlaYT5JIF{e2G7 NVnXeVdqhjFyMECgcm0> MUDEUXNQ NULwPGVndm9ic3nncolncWOjboSgZ5l1d3SxeHnjbZR6 NXPOOoNFOTh|OUezOFU>
MM.1S MYnDfZRwgGmlaYT5JIF{e2G7 M1W5VJ4yODByIH7N Mn:3SG1UVw>? MmDhco8he2mpbnnmbYNidnRiY4n0c5RwgGmlaYT5 MlfaNVg{QTd|NEW=
RPMI-Dox40 NWqxR5l5S3m2b4jpZ4l1gSCjc4PhfS=> MmftglExODBibl2= M1vvSWROW09? NVX2N3hJdm9ic3nncolncWOjboSgZ5l1d3SxeHnjbZR6 MYmxPFM6PzN2NR?=
RPMI-LR5 NGrafGZEgXSxeHnjbZR6KGG|c3H5 MWT+NVAxOCCwTR?= NIHVcYdFVVOR Ml3Jco8he2mpbnnmbYNidnRiY4n0c5RwgGmlaYT5 NHXKTnUyQDN7N{O0OS=>
INA-6 MmLkR5l1d3irY3n0fUBie3OjeR?= MVj+NVAxOCCwTR?= M2XLOGROW09? NEe0co5vdyC|aXfubYZq[2GwdDDjfZRwfG:6aXPpeJk> NXHXRXZUOTh|OUezOFU>
CD14+ MWLGeY5kfGmxbjDhd5NigQ>? M1vMep45ODBibl2= MnrISG1UVw>? MkfJbY5pcWKrdIOgc5N1\W:lbHHzeI9o\W6nc3nzJIZzd21iQ1SxOEBxd3OrdHn2[UBk\Wyucx?= NWj0SmJrOTh|OUezOFU>
U-87-MG NWHjVFh5TnWwY4Tpc44h[XO|YYm= MVixJO69VQ>? M{DCVWROW09? NGLHVZVz\WS3Y3XzJJR2dW:{LXTybZZmdiClb4LkJIZwem2jdHnvci=> M2XSRVI{OzN3NUC2
MDA-MB-231 Ml;CSpVv[3Srb36gZZN{[Xl? NH2wcVcyKM7:TR?= M2C2emROW09? NXTxc4xyemWmdXPld{B1fW2xcj3kdol3\W5iY3;y[EBnd3KvYYTpc44> MXSyN|M{PTVyNh?=
A-2780 MnzBSpVv[3Srb36gZZN{[Xl? MU[xJO69VQ>? MXTEUXNQ MlK3doVlfWOnczD0eY1wei2mcnn2[Y4h[2:{ZDDmc5Ju[XSrb36= M{Ozd|I{OzN3NUC2
SK-OV-3 MWHGeY5kfGmxbjDhd5NigQ>? MY[xJO69VQ>? MnG4SG1UVw>? NWG3b20yemWmdXPld{B1fW2xcj3kdol3\W5iY3;y[EBnd3KvYYTpc44> MXeyN|M{PTVyNh?=
LXFA-629 NGPnd2FHfW6ldHnvckBie3OjeR?= M3rCeFEh|ryP M3POSWROW09? M{XGUZJm\HWlZYOgeJVud3JvZILpeoVvKGOxcnSg[o9zdWG2aX;u M2nh[|I{OzN3NUC2
NCI-H1650 M3PjdmZ2dmO2aX;uJIF{e2G7 M2PiU|Eh|ryP MUHEUXNQ NHrkfFBz\WS3Y3XzJJR2dW:{LXTybZZmdiClb4LkJIZwem2jdHnvci=> NILpUJMzOzN|NUWwOi=>
PC-3 NYHaU4VWTnWwY4Tpc44h[XO|YYm= NUjON4hOOSEQvF2= NEf4N2lFVVOR NEHsWZdz\WS3Y3XzJJR2dW:{LXTybZZmdiClb4LkJIZwem2jdHnvci=> NHnMWHUzOzN|NUWwOi=>
RAW264.7 NIXGWGtHfW6ldHnvckBie3OjeR?= MYL+NlAh|ryP M{SwOGROW09? MVTpcohq[mm2czDBcol{d227Y3nuMZN1cW23bHH0[YQhVUt{IIDoc5NxcG:{eXzheIlwdiC5aYToJGlEPTBib3[gN|UvOyCwTR?= MY[yOFM2PjhzNB?=
mouse peritoneal macrophages NWX1O5o5TnWwY4Tpc44h[XO|YYm= MWP+NlAh|ryP MlfzSG1UVw>? MWDMVHMwUU[QLd8z5qCUe3SrbYXsZZRm\CCWTl[t{tEheHKxZIXjeIlwdiC5aYToJGlEPTBib3[gOk4{KG6P NGjycXkzPDN3NkixOC=>
A549 MVjGeY5kfGmxbjDhd5NigQ>? NWrTTpFLhjJyIN88US=> MXXEUXNQ MnGzbY5pcWKrdIOgUHBUNWmwZIXj[YQhS1iFTEigdJJw\HWldHnvckB4cXSqIFnDOVAhd2ZiMUS0Mlkhdk1? NW\rb25HOjR|NU[4NVQ>
MDA-231 MVLGeY5kfGmxbjDhd5NigQ>? NVTTN41vhjFyIN88US=> NFexOVB{fXCycnXzd4V{KESNSz2xJIV5eHKnc4Ppc44> NWT0OmdVOjZ2MEe4OFM>
MCF-7 NUG4PXVmTnWwY4Tpc44h[XO|YYm= MoLGglExKM7:TR?= MmOwd5VxeHKnc4Pld{BFU0tvMTDlfJBz\XO|aX;u M{Xk[FI3PDB5OESz
MDA-435 NIXLeWRHfW6ldHnvckBie3OjeR?= MXP+NVAh|ryP NUHzOlNOe3WycILld5NmeyCGS1utNUBmgHC{ZYPzbY9v NH7iRWwzPjRyN{i0Ny=>
PC3 NH7FTHhHfW6ldHnvckBie3OjeR?= NYnZb4x[hjFyIN88US=> NVzBN4JYTE2VTx?= M37nTZN2eHC{ZYPz[ZMhTEuNLUGg[ZhxemW|c3nvci=> MX[yOlkyOzZyOB?=

... Click to View More Cell Line Experimental Data

In vivo In LPS-induced mice, LY2228820 effectively inhibits the formation of TNFα with a threshold minimum 50% effective dose (TMED50) less than 1 mg/kg. In a rat model of collagen-inducedarthritis (CIA), LY2228820 displays potent effects on paw swelling, bone erosion, and cartilage destruction, with a threshold minimum 50% effective dose (TMED50)of 1.5 mg/kg. [1]


Kinase Assay:[1]
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Inhibition of p38α:

Inhibition of p38α is determined using recombinant human p38α in a standard filter binding protocol using ATP[γ-33P] and EGFR 21-mer peptide as substrate. Functional inhibition of TNFα in murine peritoneal macrophages is determined using LPS stimulation in the presence of LY2228820. To assess p38α activity in cells more directly, RAW 264.7 cells are treated with LY2228820 and then stimulated with anisomycin. The level of p38α activity is detected using a phosphoMAPKAPK-2 (pMK2) (Thr 334) antibody which reacts with a residue specifically phosphorylated by p38α.
Cell Research:[2, 3]
+ Expand
  • Cell lines: MM cells, including INA6, RPMI-8226, U266, and RPMI-Dox40
  • Concentrations: 200 nM–800 nM
  • Incubation Time: 48 hours
  • Method: MTT assays and APO 2.7 staining are performed to assess cellular proliferation and induction of apoptosis, respectively. Viability is expressed as percent viable cells. Apoptosis in cells is evaluated by APO 2.7 staining. For detection of mitochondrial membrane protein 7A6 expressed in apoptotic cells, cells are incubated with APO 2.7 reagent for 20 min. Expression of APO 2.7 is determined using an EPICS XL flow cytometer.
    (Only for Reference)
Animal Research:[1]
+ Expand
  • Animal Models: Lipopolysaccharide (LPS)-induced Balb/c mice
  • Formulation: Dissolved in 1% CMC/0.25% Tween 80 in water
  • Dosages: 0–20 mg/kg
  • Administration: Oral bid dosing for 14 days
    (Only for Reference)

Solubility (25°C)

In vitro Water 100 mg/mL warmed (163.2 mM)
DMSO 4 mg/mL warmed (6.52 mM)
Ethanol 3 mg/mL (4.89 mM)
In vivo Add solvents individually and in order:
30 mg/mL

* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information

Molecular Weight 612.74


CAS No. 862507-23-1
Storage powder
Synonyms N/A

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Clinical Trial Information

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT02364206 Recruiting Adult Glioblastoma Centre Jean Perrin|National Cancer Institute, France|ARC Foundation for Cancer Research June 2015 Phase 1|Phase 2
NCT02322853 Recruiting Postmenopausal|Metastatic Breast Cancer Centre Francois Baclesse|National Cancer Institute, France|ARC Foundation for Cancer Research January 2015 Phase 2
NCT01663857 Active, not recruiting Epithelial Ovarian Cancer|Fallopian Tube Cancer|Primary Peritoneal Cancer Eli Lilly and Company July 2012 Phase 1|Phase 2
NCT01393990 Completed Advanced Cancer Eli Lilly and Company August 2008 Phase 1

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID