Catalog No.S7537

LB-100 Chemical Structure

Molecular Weight(MW): 268.31

LB-100 is a water soluble protein phosphatase 2A (PP2A) inhibitor with IC50s of 0.85 μM and 3.87 μM in BxPc-3 and Panc-1 cells.

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Cited by 5 Publications

2 Customer Reviews

  • LB-100 induced HDAC2 S394 phosphorylation.

    Exp Mol Med, 2018, 50(7):83. LB-100 purchased from Selleck.

    LB-100 (a protein phosphatase-2A inhibitor) induces a significant increase for hypoxia-inducible factor (HIF)-1α and vascular endothelial growth factor (VEGF)-C expression by enhancing phosphatidylinositol 3-kinase (PI3K)p85/AKT/ mechanistic target of rapamycin (mTOR) signaling. Western blot analysis results for phosphorylated and total PI3Kp85/AKT/mTOR, HIF-1α, and VEGF-C with or without monocyte chemoattractant protein (MCP)-1 or LB-100 treatment. Bar graphs show quantitative results by densitometric analysis. n = 3 or more independent replications. ∗P < 0.05, ∗∗P < 0.01. Gapdh, glyceraldehyde-3-phosphate dehydrogenase; p, phosphorylated.

    Am J Pathol, 2017, 187(8):1736-1749. LB-100 purchased from Selleck.

Purity & Quality Control

Choose Selective phosphatase Inhibitors

Biological Activity

Description LB-100 is a water soluble protein phosphatase 2A (PP2A) inhibitor with IC50s of 0.85 μM and 3.87 μM in BxPc-3 and Panc-1 cells.
PP2A [1]
In vitro

LB-100 inhibits the cell growth with IC50 of 2.3 μM (in BxPc-3) or 1.7 μM (in Panc-1 cell). In BxPc-3, Panc-1, and SW1990 cells, LB-100 reduces the PP2A activity by 30-50%. LB-100 increases concentration of doxorubicin within cells (2.5 fold to control) and sensitizes tumor cells to the cytotoxicity of doxorubicin. LB-100 increaseds VEGF secretion, and thus enhances HIF-1α-VEGF mediated angiogenesis.[1]

Cell Data
Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
CH-157 cells Mkn4SpVv[3Srb36gZZN{[Xl? M{nHdlIvPSEQvF2= NXHF[ndTOyCqb4Xydy=> M4HzS2xDNTFyMDDzbYdvcW[rY3HueIx6KGWwaHHuZ4VlKHSqZTDwdo9xd3K2aX;uJI9nKGOnbHzzJIlvKEd{L12u M3XqcVI6OTl7MEC2
DAOY cells NFz1N4dE\WyuII\pZYJqdGm2eTDhd5NigQ>? M1LkPWlEPTB;Mj65JO69VSxidYPpcochYFSWIHHzd4F6ew>? MX6yOlc6QTZ5MB?=
D341 cells MXfD[YxtKH[rYXLpcIl1gSCjc4PhfS=> MoT5TWM2OD1zLkmg{txONCC3c3nu[{BZXFRiYYPzZZl{ NWf4WlJWOjZ5OUm2O|A>
D283 cells NU\T[FNPS2WubDD2bYFjcWyrdImgZZN{[Xl? Mlz1TWM2OD1yLkmg{txONCC3c3nu[{BZXFRiYYPzZZl{ NXXLXYJ7OjZ5OUm2O|A>
U251 cells MnjBSpVv[3Srb36gZZN{[Xl? NGPS[|QzKM7:TR?= MmKxN{Bpd3W{czDhcoQhPiCqb4Xydy=> MYH0doVifG2nboSge4l1cCB{IN88UUBNSjFyMDDy[YR2[2WmIGDQNmEh[WO2aY\peJkhfG9iNkGlJI9nKGOxboTyc4wh[2WubIOgZYZ1\XJiYn;0bEB1cHKnZTDhcoQhe2m6IHjveZJ{KG:oIFzCNVAxKGW6cH;zeZJmNg>? MojmNlU6Ozl5NkK=
SKOV-3 M2P6ZmN6fG:2b4jpZ4l1gSCjc4PhfS=> Mn3MO|IhcA>? MnjsTWM2OCB;IEGwMlEhyrFiMT64JO69VQ>? MUKyOVM4PjZyOB?=
OVCAR-8 M4HVTGN6fG:2b4jpZ4l1gSCjc4PhfS=> NXG3ZnVSPzJiaB?= M{\Nc2lEPTBiPTC1MlUhyrFiMD61JO69VQ>? MmXLNlU{PzZ4MEi=
PEO-4 MnLnR5l1d3SxeHnjbZR6KGG|c3H5 NWm5dFBTPzJiaB?= MmCzTWM2OCB;IEWgxtEhOC54IN88US=> NHjJU4EzPTN5Nk[wPC=>
PEO1-Brca2 Missense MmLCR5l1d3SxeHnjbZR6KGG|c3H5 MWG3NkBp NHz1OXhKSzVyIE2gOk4zKMLzIEGuOUDPxE1? NWDZR3IxOjV|N{[2NFg>
PEO1-Brca2 STOP MlzyR5l1d3SxeHnjbZR6KGG|c3H5 NWfaZmtmPzJiaB?= MoW2TWM2OCB;IE[uNkDDuSBzLkCg{txO M4fmWVI2Ozd4NkC4
Huh-7 M2LmU3BROkFiYXP0bZZqfHliYYPzZZl{ NGf1bWw2KM7:bX;sM2w> NX\6W2hiOiCq NWmwOWJqemWmdXPl[EB1cGViYXP0bZZqfHlib3[gVHAzSSC2bzDhZo92fCB5MDW= MmLBNlQ5Pjd{NEm=
HepG2 MmTrVHAzSSCjY4Tpeol1gSCjc4PhfZM> Mn3zOUDPxG2xbD;M NInFPHQzKGh? MnjkdoVlfWOnZDD0bIUh[WO2aY\peJkhd2ZiUGCyRUB1dyCjYn;1eEA4OCV? MYOyOFg3PzJ2OR?=
HL-7702 MlXOVHAzSSCjY4Tpeol1gSCjc4PhfZM> NXrzPW1RPSEQvH3vcE9N NIjMTWMzKGh? Ml;MdoVlfWOnZDD0bIUh[WO2aY\peJkhd2ZiUGCyRUB1dyCjYn;1eEA4OCV? M{jJWlI1QDZ5MkS5

... Click to View More Cell Line Experimental Data

Methods Test Index PMID
Western blot
p-AMPKα1 / AMPKα1 / p-ACC / ACC / p-p70S6K1 / p-4EBP1 ; 

PubMed: 29221169     

HCT-116 cells were treated with LB-100 at 10 μM, cells were further cultured for the designated time. Expressions of listed proteins were tested by Western blotting assay.  

Cyclin D1 / c-myc / mcl-1 / Hsp90 ; 

PubMed: 29199006     

LB-100 down-regulates expression of STAT3 target genes. Western blot analysis of IOMM-LEE, GAR and CH-157 cells treated with increasing LB100 concentration demonstrates dose-dependent decrease in STAT3 target genes, including mcl-1, c-myc, and cyclin D.

29221169 29199006
Growth inhibition assay
Cell division ; 

PubMed: 29844427     

In vitro proliferation of CD4+ T cells in the presence of LB-100 dose titration, measured by dilution of the cytosolic CFSE. Percentage of cells divided was plotted against concentration of LB-100.

Cell viability ; 

PubMed: 29199006     

Three meningioma cell lines IOMM-LEE, GAR and CH-157 were used in vitro. XTT assays were performed after 48 hours of treatment. Increasing concentrations of LB-100 reduced cell viability, but cytotoxic effect was seen only at high drug concentration with 䲧疝Ỵ疞㧀

29844427 29199006
In vivo In a mouse pancreatic cancer xenograft model, LB-100 (2 mg/kg, i.p.) enhances chemotherapy of doxorubicin. LB-100 causes higher density of microvessel in tumors and rapid blood flow at the surface of tumors. [1]


Kinase Assay:


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PP2A activity assays:

Cultured pancreatic cancer cells are treated with IC50 of LB-100 for each cell line or equal volume of vehicle for 2 hours, and PP2A activity assays are then performed using Ser/Thr phosphatase assay kit. Cells are lysed with an ultrasonic cell disruptor, and the PP2A concentration is measured using a Ser/Thr phosphatase assay kit according to the instructions. Assays for each cell line are performed in triplicate.
Cell Research:


+ Expand
  • Cell lines: BxPc-3, and Panc-1 cell lines
  • Concentrations: ~ 10 μM
  • Incubation Time: 48 h
  • Method:

    Cytotoxicity is conducted by using a Cell Counting Kit-8. Cells are seeded in 96-well plates with a density of 3000 cells per well and are assessed after treatments following the CCK-8 protocol. Relative cytotoxicity is expressed as a percentage of specific controls.

    (Only for Reference)
Animal Research:


+ Expand
  • Animal Models: BALB/c nude mice bearing Panc-1 xenograft
  • Formulation: Phosphate buffered saline
  • Dosages: 2 mg/kg
  • Administration: i.p.
    (Only for Reference)

Solubility (25°C)

In vitro Water 53 mg/mL (197.53 mM)
DMSO Insoluble
Ethanol Insoluble

* 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 268.31


CAS No. 1026680-07-8
Storage powder
in solvent
Synonyms N/A

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Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID