Catalog No.S7786 Synonyms: CP358774, NSC 718781

Erlotinib Chemical Structure

Molecular Weight(MW): 393.44

Erlotinib is an EGFR inhibitor with IC50 of 2 nM, >1000-fold more sensitive for EGFR than human c-Src or v-Abl.

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Cited by 80 Publications

17 Customer Reviews

  • Erlotinib IC50 in HCC827 cell lines measured 48h after treatment with vehicle (control) or with erlotinib. Erlotinib IC50 is shown in parentheses. Data are representative of 3 independent experiments. Effects of treatment for 48h with a vehicle or the indicated doses of MP-470 in parental or ER1 and ER2 cell lines in the absence and presence of erlotinib on the indicated biomarkers.

    Nat Genet 2012 44(8):852-60. Erlotinib purchased from Selleck.

    J Clin Invest 2012 122, 3197-210. Erlotinib purchased from Selleck.

  • Effects of combined treatment with erlotinib and NPS-1034 in HCC827/ER cells with AXL activation. Lysates were immunoprecipitated with an anti-AXL antibody and immunoblotted with antibodies for phosphotyrosine (p-Tyr) and AXL. HCC827/ER cells were treated with erlotinib. E, erlotinib; N, NPS-1034. **, P < 0.001 for the combination of erlotinib plus NPS-1034 versus either the control or drug alone.

    Cancer Res 2014 4(1):253-62. Erlotinib purchased from Selleck.

    (a&b) EGFR protein expression levels in 4T1, CT26 or SCC7 tumors with or without erlotinib treatment analyzed byWestern blotting (a) and the corresponding semi-quantitative results (b). (c) VEGF levels in different tumors measured by ELISA.

    Biomaterials, 2017, 148:69-80. Erlotinib purchased from Selleck.

  • Immunoblots of MCF7-HER2 cells treated with DMSO (c), BEZ235 (B, 500 nM) and lapatinib (L, 500 nM) as well as with erlotinib (E, 500 nM) and the indicated combinations for 24 h.



    Oncogene 2010 30, 2547-2557. Erlotinib purchased from Selleck.

    LNCaP-AI cells were starved in 1% stripped medium for 24 h. The cells were then treated with Erlotinib (20 μM), Gefitinib (20 μM), Lapatinib (20 μM), CI-1033 (8 μM), LY294002 (20 μM) and Bortezomib (20 μM) for 24 h. Cell culture medium was collected from each sample and subjected to ELISA for sPLA2-IIa. The condition medium samples were diluted 10 times for ELISA. Average of duplicate samples was converted to nanogram per milliliter against standard curve. The data represent one of five repeated experiments.



    Carcinogenesis 2010 31, 1948–1955. Erlotinib purchased from Selleck.

  • (B–C) LNCaP (B) and LNCaP-AI (C) cells were transiently transfected with sPLA2-IIa(-800)-Luc (0.5 μg). The cells were then treated with Erlotinib (20 μM), Gefitinib (20 μM), Lapatinib (20 μM), CI-1033 (8 μM), LY294002 (20 μM) and Bortezomib (20 μM) without or with EGF (100 ng/ml) for 24 h. Luciferase assay was performed according to a standard protocol with Renilla luciferase as an internal control. Data are presented as the mean (±SD) of duplicate values of a representative experiment that was independently repeated for five times.

    Carcinogenesis 2010 31, 1948–1955. Erlotinib purchased from Selleck.

    Susceptibility of lung cancer cells to cytolytic activity of NK-92 cells after treatment with EGFR inhibitors. Three lung cancer cells were untreated (open circle) or treated with 10 μM erlotinib or gefitinib (black filled square or black filled triangle) for 24 hours. The lung cancer cells were cocultured with NK-92 cells at indicated effector to target ratio (E:T ratio). To determine the specificity of NKG2D-mediated cytolysis of lung cancer cells, NK-92 cells were preincubated with blocking mAb against NKG2D before the assay (gray filled square and triangle) and correspond-ing isotype mAb (open square and triangle).

    J Immunother 2011 34, 372-81. Erlotinib purchased from Selleck.


    The TMZ-induced caveolin-1 modulation is Src-dependent in Hs683 GBM cells Western blot analyses of soluble caveolin-1 expression in Hs683 glioma cells treated with TMZ (100 μM) four times per week (day 1-4) for 7 h/d, the EGFR inhibitor (10 μM) (erlotinib; day 1), the Src inhibitor AZD0530 (10 μM) (day 1), and combination of the inhibitors and TMZ (+TMZ) compared with control untreated cells (Ct). Soluble caveolin-1 expression was measured on day 5.

    Transl Oncol 2011 4, 92-100. Erlotinib purchased from Selleck.

    Pressure-induced myogenic tone in coronary arterioles with and without EGFR tyrosine kinase inhibitors (AG1478 and Erlotinib, 1 μM) n=6, *Pb0.05 CTR vs. EGFR inhibitor



    Microvasc Res 2010 81, 135-142. Erlotinib purchased from Selleck.

  • Erlotinib and picropodophyllin (PPP) act together to reduce cell proliferation. MET1 cells were cultured for 48 hours in increasing concentrations of erlotinib (A) or PPP (B) as indicated. Cell growth was then assessed using methyl thiazolyl-tetrazolium (MTT) assays. A dose-dependent decrease in the number of viable cells is seen with rising inhibitor concentrations (n = 3 at all time points). MET1 cells (C), MET4 cells (D), SCC12 cells (E), and SCC13 cells (F) were cultured for 48 hours in varying concentrations of erlotinib and PPP as indicated. Cell growth was then assayed with MTT assays. Both erlotinib and PPP demonstrated dose-dependent inhibition of cell growth, and at intermediate concentrations there seemed to be synergistic prevention of cell growth by both inhibitors. Higher concentrations of all inhibitors were also tested but are not shown as they exceeded the maximal responses of the cells to the inhibitors.

    Head Neck 2013 35, 86-93. Erlotinib purchased from Selleck.

    Tuberc Respir Dis 2013 75(1), 9-17. Erlotinib purchased from Selleck.

  • Inhibition of anchorage-independent growth of lung tumor cell lines by selected inhibitors. Each selected cell line was treated with the indicated inhibitor at 0.1 μM and 1 μM concentrations for two weeks and cell colony size formation was scored under the Nikon inverted-phase microscope.

    Int J Proteomics 2011 215496. Erlotinib purchased from Selleck.

    DUSP6 is regulated by EGFR/ERK inhibition in NSCLC cell lines. Protein expression levels were assayed by immunoblot for phosphor-EGFR at indicated tyrosine sites, total-EGFR, phosphor-ERK, total-ERK, ETS1, DUSP6 and GAPDH demonstrating suppression of DUSP6 following inhibition of activated ERK (P-ERK) and ETS1 levels in the presence of appropriate drug for each of the following cell lines: (a) HCC827 cells treated with erlotinib; (b) H1975 cells treated with erlotinib or CL-387,785 (an irreversible EGFR inhibitor); H441 cells treated with (c) erlotinib or U0126 (a MEK1/2 inhibitor) and (d) erlotinib or AG1478 (specific EGFR inhibitor) (d). Cells were starved overnight with serum-free media, then treated with drug as indicated by the following abbreviations: (E) 100ng/ml EGF; (D) 0.01% DMSO control; (Er) 1 μM erlotinib, (CL) 1 μM CL-387,785, (U) 20 μM U0126 or AG1478. Whole cell lysates were obtained using 10% TCA lysis buffer and immunoblotting was performed at indicated time points.



    2010 Dr. Balazs Halmos of Columbia University. Erlotinib purchased from Selleck.

  • DUSP6 gene expression is inhibited by erlotinib using quantitative real-time PCR analysis. RNA was extracted from treated (a) HCC827 and (b) PC9 cells and relative expression level standardized against GAPDH at several time points.



    2010 Dr. Balazs Halmos of Columbia University. Erlotinib purchased from Selleck.

    Breast cancer cells were pretreated with 100ng/ml EGF for 15 min and then treated with the indicated concentrations of  Erlotinib for 24 hours.



    2010 Dr. Zhang of Tianjin Medical University. Erlotinib purchased from Selleck.

  • Inhibition rate was tested at different intervals with the lower 48-h IC50 of the pair of stably transfected cell lines. The error bars represent mean ± SE of three independent experiments. *P < 0.05

    Biochem Biophys Res Commun, 2018, 495(1):733-739. Erlotinib purchased from Selleck.

Purity & Quality Control

Choose Selective EGFR Inhibitors

Biological Activity

Description Erlotinib is an EGFR inhibitor with IC50 of 2 nM, >1000-fold more sensitive for EGFR than human c-Src or v-Abl.
EGFR [1]
(Cell-free assay)
2 nM
In vitro

Erlotinib HCl potently inhibits EGFR activation in intact cells including HNS human head and neck tumor cells (IC50 20nM), DiFi human colon cancer cells and MDA MB-468 human breast cancer cells. Erlotinib HCl (1 μM) induces apoptosis in DiFi human colon cancer cells. [1] Erlotinib inhibits growth of a panel of NSCLC cell lines including A549, H322, H3255, H358 H661, H1650, H1975, H1299, H596 with IC50 ranging from 29 nM to >20 μM. [2] Erlotinib HCl(2 μM) significantly inhibits growth of AsPC-1 and BxPC-3 pancreatic cells. [3] The effects of Erlotinib HCl in combination with gemcitabine are considered additive in KRAS-mutated pancreatic cancer cells. Ten micromolar of Erlotinib HCl inhibits EGFR phospho-rylation at the Y845 (Src-dependent phosphorylation) and Y1068 (auto-phosphorylation) sites. [4] Combination with Erlotinib HCl could down-modulate rapamycin-stimulated Akt activity and produces a synergistic effect on cell growth inhibition. [5]

Cell Data
Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
human A431 cells NWT3N3oxTnWwY4Tpc44h[XO|YYm= NHjT[GNKdmirYnn0bY9vKG:oIFXHSnIhcW5iaIXtZY4hSTR|MTDj[YxteyCkeTDIWHJHKGG|c3H5MEBKSzVyPUCuOFIh|ryPLh?= M2jUV|E6QDF3NEGy
human SKBR3 cells MUTGeY5kfGmxbjDhd5NigQ>? M{TDXGlvcGmkaYTpc44hd2ZiSFXSNkBqdiCqdX3hckBUU0KUMzDj[YxteyCkeTDIWHJHKGG|c3H5MEBKSzVyPUGuPFkh|ryPLh?= MmTpNVk5OTV2MUK=

... Click to View More Cell Line Experimental Data

In vivo At doses of 100 mg/kg, Erlotinib HCl completely prevents EGF-induced autophosphorylation of EGFR in human HN5 tumors growing as xenografts in athymic mice and of the hepatic EGFR of the treated mice. [1] Erlotinib HCl (100 mg/Kg) inhibits H460a and A549 tumor models with 71 and 93% inhibition rate. [5]


Kinase Assay:


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Kinase assays:

96-well plates are coated by incubation overnight at 37 °C with 100 μL per well of 0.25 mg/mL PGT in PBS. Excess PGT is removed by aspiration, and the plate is washed 3 times with washing buffer (0.1% Tween 20 in PBS). The kinase reaction is performed in 50 μL of 50 mM HEPES (pH 7.3), containing 125 mM sodium chloride, 24 mM magnesium chloride, 0.1 mM sodium orthovanadate, 20 μM ATP, 1.6 μg/mL EGF, and 15 ng of EGFR, affinity purified from A431 cell membranes. Erlotinib HCl in DMSO is added to give a final DMSO concentration of 2.5%. Phosphorylation is initiated by addition of ATP and proceeded for 8 minutes at room temperature, with constant shaking. The kinase reaction is terminated by aspiration of the reaction mixture and is washed 4 times with washing buffer. Phosphorylated PGT is measured by 25 minutes of incubation with 50 μL per well HRP-conjugated PY54 antiphosphotyrosine antibody, diluted to 0.2 μg/mL in blocking buffer (3% BSA and 0.05% Tween 20 in PBS). Antibody is removed by aspiration, and the plate is washed 4 times with washing buffer. The colorimetric signal is developed by addition of TMB Microwell Peroxidase Substrate, 50μL per well, and stopped by the addition of 0.09 M sulfuric acid, 50 μL per well. Phosphotyrosine is estimated by measurement of absorbance at 450 nm. The signal for controls is typically 0.6-1.2 absorbance units, with essentially no back ground in wells without AlP, EGFR, or PGT and is proportional to the time of incubation for 10 minutes.
Cell Research:


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  • Cell lines: A549, H322, H3255, H358 H661, H1650, H1975, H1299, H596 cells
  • Concentrations: 30 nM-20 μM
  • Incubation Time: 72 hours
  • Method:

    Exponentially growing cells are seeded in 96-well plastic plates and exposed to serial dilutions of erlotinib, pemetrexed, or the combination at a constant concentration ratio of 4:1 in triplicates for 72 h. Cell viability is assayed by cell count and the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. Growth inhibition is expressed as the percentage of surviving cells in drug-treated versus PBS-treated control cells (which is considered as 100% viability). The IC50 value is the concentration resulting in 50% cell growth inhibition by a 72-h exposure to drug(s) compared with untreated control cells and is calculated by the CalcuSyn software.

    (Only for Reference)
Animal Research:


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  • Animal Models: Male 5-week-old BALB-nu/nu mice with HPAC cells
  • Formulation: 6% Captisol
  • Dosages: 50 mg/kg
  • Administration: Oral administration
    (Only for Reference)

Solubility (25°C)

In vitro DMSO 78 mg/mL (198.25 mM)
Ethanol 15 mg/mL warmed (38.12 mM)
Water Insoluble
In vivo Add solvents to the product individually and in order(Data is from Selleck tests instead of citations):
5% DMSO+30% PEG 300+5% Tween 80+ddH2O
For best results, use promptly after mixing.

* 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 393.44


CAS No. 183321-74-6
Storage powder
in solvent
Synonyms CP358774, NSC 718781

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Clinical Trial Information

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT03720873 Recruiting EGFR Gene Mutation Fujian Cancer Hospital October 2018 Phase 2
NCT03653546 Not yet recruiting Non-small Cell Lung Cancer|EGFR Gene Mutation|Brain Metastases Alpha Biopharma (Jiangsu) Co. Ltd. August 31 2018 Phase 2|Phase 3
NCT03529084 Withdrawn Carcinoma Non-small Cell Lung Novartis Pharmaceuticals|Novartis July 23 2018 Phase 3
NCT03628521 Recruiting Lung Cancer|Advanced Stage Shanghai Chest Hospital July 20 2018 Phase 1
NCT03498521 Recruiting Cancer of Unknown Primary Site Hoffmann-La Roche|Foundation Medicine Inc. July 10 2018 Phase 2
NCT03647592 Recruiting Efficacy and Safety of Erlotinib Combined With Bevacizumab in EGFR Mutation Positive Advanced Non-squamous Non-small Cell Lung Cancer Hunan Province Tumor Hospital June 1 2018 --

Tech Support

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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Frequently Asked Questions

  • Question 1:

    Can you please give me some advice for which solvent we should use to dissolve it for animal studies?

  • Answer:

    For in vivo application, we recommend to use 5% DMSO+45% PEG 300+ddH2O up to 6mg/ml.

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID