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Published in: Clinical Oral Investigations 4/2016

01-05-2016 | Original Article

Erlotinib and gefitinib responsiveness in head and neck cancer cell lines—a comparing analysis with cetuximab

Authors: Stefan Hartmann, Norbert Neckel, Axel Seher, Grit Mutzbauer, Roman C. Brands, Christian Linz, Alexander C. Kübler, Urs D. A. Müller-Richter

Published in: Clinical Oral Investigations | Issue 4/2016

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Abstract

Objective

The objective of this study is to examine the efficacy of erlotinib and gefitinib with respect to epidermal growth factor (EGF) and cetuximab response in head and neck cancer cell lines.

Materials and methods

Five human head and neck carcinoma cell lines were treated with EGF, cetuximab, erlotinib, and gefitinib, and the effects were measured with a crystal violet assay. The efficacies of cetuximab, erlotinib, and gefitinib in clinically relevant concentrations were statistically analyzed. The expression of the epidermal growth factor receptor (EGFR) and phosphorylation patterns were detected with fluorescence-activated cell sorting (FACS) analysis and western blot analysis. The endogenous production of EGF by the cells was detected with an enzyme-linked immunosorbent assay. Finally, EGFR, KRAS, BRAF, and PI3K mutation analyses were performed.

Results

All of the cell lines had a poor or no response to EGF but exhibited distinct EGFR phosphorylation and EGFR expression. Compared to cetuximab, erlotinib and gefitinib demonstrated a greater impact on the majority of the cell lines. The only cell line that showed a concentration-dependent behavior toward EGF and strong EGFR phosphorylation was entirely resistant to cetuximab, erlotinib, and gefitinib. The production of EGF in all cell lines was very low. Mutational analysis of all cell lines revealed wild-type EGFR, KRAS, BRAF, and PI3K.

Conclusions

The prediction of anti-EGFR treatment cannot be based on responsiveness to EGF or EGFR activation.

Clinical relevance

Erlotinib and gefitinib show good response in EGF-independent cell lines and might be useful drugs in tumors that are less responsive to cetuximab.
Literature
1.
go back to reference Kamangar F, Dores GM, Anderson WF (2006) Patterns of cancer incidence, mortality, and prevalence across five continents: defining priorities to reduce cancer disparities in different geographic regions of the world. J Clin Oncol 24(14):2137–2150CrossRefPubMed Kamangar F, Dores GM, Anderson WF (2006) Patterns of cancer incidence, mortality, and prevalence across five continents: defining priorities to reduce cancer disparities in different geographic regions of the world. J Clin Oncol 24(14):2137–2150CrossRefPubMed
2.
go back to reference Gupta S, Kong W, Peng Y, Miao Q, Mackillop WJ (2009) Temporal trends in the incidence and survival of cancers of the upper aerodigestive tract in Ontario and the United States. Int J Cancer 125(9):2159–2165. doi:10.1002/ijc.24533 CrossRefPubMed Gupta S, Kong W, Peng Y, Miao Q, Mackillop WJ (2009) Temporal trends in the incidence and survival of cancers of the upper aerodigestive tract in Ontario and the United States. Int J Cancer 125(9):2159–2165. doi:10.​1002/​ijc.​24533 CrossRefPubMed
3.
go back to reference Grandis JR, Tweardy DJ (1993) Elevated levels of transforming growth factor alpha and epidermal growth factor receptor messenger RNA are early markers of carcinogenesis in head and neck cancer. Cancer Res 53(15):3579–3584PubMed Grandis JR, Tweardy DJ (1993) Elevated levels of transforming growth factor alpha and epidermal growth factor receptor messenger RNA are early markers of carcinogenesis in head and neck cancer. Cancer Res 53(15):3579–3584PubMed
4.
go back to reference Saranath D, Panchal RG, Nair R, Mehta AR, Sanghavi VD, Deo MG (1992) Amplification and overexpression of epidermal growth factor receptor gene in human oropharyngeal cancer. Eur J Cancer B Oral Oncol 28B(2):139–143CrossRefPubMed Saranath D, Panchal RG, Nair R, Mehta AR, Sanghavi VD, Deo MG (1992) Amplification and overexpression of epidermal growth factor receptor gene in human oropharyngeal cancer. Eur J Cancer B Oral Oncol 28B(2):139–143CrossRefPubMed
5.
go back to reference Nicholson RI, Gee JM, Harper ME (2001) EGFR and cancer prognosis. Eur J Cancer 37(Suppl 4):S9–S15CrossRefPubMed Nicholson RI, Gee JM, Harper ME (2001) EGFR and cancer prognosis. Eur J Cancer 37(Suppl 4):S9–S15CrossRefPubMed
6.
go back to reference Chung CH, Ely K, McGavran L, Varella-Garcia M, Parker J, Parker N, Jarrett C, Carter J, Murphy BA, Netterville J, Burkey BB, Sinard R, Cmelak A, Levy S, Yarbrough WG, Slebos RJ, Hirsch FR (2006) Increased epidermal growth factor receptor gene copy number is associated with poor prognosis in head and neck squamous cell carcinomas. J Clin Oncol 24(25):4170–4176CrossRefPubMed Chung CH, Ely K, McGavran L, Varella-Garcia M, Parker J, Parker N, Jarrett C, Carter J, Murphy BA, Netterville J, Burkey BB, Sinard R, Cmelak A, Levy S, Yarbrough WG, Slebos RJ, Hirsch FR (2006) Increased epidermal growth factor receptor gene copy number is associated with poor prognosis in head and neck squamous cell carcinomas. J Clin Oncol 24(25):4170–4176CrossRefPubMed
7.
go back to reference Maurizi M, Scambia G, Benedetti Panici P, Ferrandina G, Almadori G, Paludetti G, De Vincenzo R, Distefano M, Brinchi D, Cadoni G et al (1992) EGF receptor expression in primary laryngeal cancer: correlation with clinico-pathological features and prognostic significance. Int J Cancer 52(6):862–866CrossRefPubMed Maurizi M, Scambia G, Benedetti Panici P, Ferrandina G, Almadori G, Paludetti G, De Vincenzo R, Distefano M, Brinchi D, Cadoni G et al (1992) EGF receptor expression in primary laryngeal cancer: correlation with clinico-pathological features and prognostic significance. Int J Cancer 52(6):862–866CrossRefPubMed
8.
go back to reference Niemiec J, Kolodziejski L, Dyczek S, Gasinska A (2004) Prognostic significance of epidermal growth factor receptor in surgically treated squamous cell lung cancer patients. Folia Histochem Cytobiol 42(2):111–118PubMed Niemiec J, Kolodziejski L, Dyczek S, Gasinska A (2004) Prognostic significance of epidermal growth factor receptor in surgically treated squamous cell lung cancer patients. Folia Histochem Cytobiol 42(2):111–118PubMed
10.
go back to reference Loeffler-Ragg J, Witsch-Baumgartner M, Tzankov A, Hilbe W, Schwentner I, Sprinzl GM, Utermann G, Zwierzina H (2006) Low incidence of mutations in EGFR kinase domain in Caucasian patients with head and neck squamous cell carcinoma. Eur J Cancer 42(1):109–111CrossRefPubMed Loeffler-Ragg J, Witsch-Baumgartner M, Tzankov A, Hilbe W, Schwentner I, Sprinzl GM, Utermann G, Zwierzina H (2006) Low incidence of mutations in EGFR kinase domain in Caucasian patients with head and neck squamous cell carcinoma. Eur J Cancer 42(1):109–111CrossRefPubMed
11.
go back to reference Rivera F, Garcia-Castano A, Vega N, Vega-Villegas ME, Gutierrez-Sanz L (2009) Cetuximab in metastatic or recurrent head and neck cancer: the EXTREME trial. Expert Rev Anticancer Ther 9(10):1421–1428. doi:10.1586/era.09.113 CrossRefPubMed Rivera F, Garcia-Castano A, Vega N, Vega-Villegas ME, Gutierrez-Sanz L (2009) Cetuximab in metastatic or recurrent head and neck cancer: the EXTREME trial. Expert Rev Anticancer Ther 9(10):1421–1428. doi:10.​1586/​era.​09.​113 CrossRefPubMed
12.
go back to reference Vermorken JB, Mesia R, Rivera F, Remenar E, Kawecki A, Rottey S, Erfan J, Zabolotnyy D, Kienzer HR, Cupissol D, Peyrade F, Benasso M, Vynnychenko I, De Raucourt D, Bokemeyer C, Schueler A, Amellal N, Hitt R (2008) Platinum-based chemotherapy plus cetuximab in head and neck cancer. N Engl J Med 359(11):1116–1127. doi:10.1056/NEJMoa0802656 CrossRefPubMed Vermorken JB, Mesia R, Rivera F, Remenar E, Kawecki A, Rottey S, Erfan J, Zabolotnyy D, Kienzer HR, Cupissol D, Peyrade F, Benasso M, Vynnychenko I, De Raucourt D, Bokemeyer C, Schueler A, Amellal N, Hitt R (2008) Platinum-based chemotherapy plus cetuximab in head and neck cancer. N Engl J Med 359(11):1116–1127. doi:10.​1056/​NEJMoa0802656 CrossRefPubMed
13.
go back to reference Levy EM, Sycz G, Arriaga JM, Barrio MM, von Euw EM, Morales SB, Gonzalez M, Mordoh J, Bianchini M (2009) Cetuximab-mediated cellular cytotoxicity is inhibited by HLA-E membrane expression in colon cancer cells. Innate Immun 15(2):91–100. doi:10.1177/1753425908101404 CrossRefPubMed Levy EM, Sycz G, Arriaga JM, Barrio MM, von Euw EM, Morales SB, Gonzalez M, Mordoh J, Bianchini M (2009) Cetuximab-mediated cellular cytotoxicity is inhibited by HLA-E membrane expression in colon cancer cells. Innate Immun 15(2):91–100. doi:10.​1177/​1753425908101404​ CrossRefPubMed
14.
go back to reference Martins RG, Parvathaneni U, Bauman JE, Sharma AK, Raez LE, Papagikos MA, Yunus F, Kurland BF, Eaton KD, Liao JJ, Mendez E, Futran N, Wang DX, Chai X, Wallace SG, Austin M, Schmidt R, Hayes DN (2013) Cisplatin and radiotherapy with or without erlotinib in locally advanced squamous cell carcinoma of the head and neck: a randomized phase II trial. J Clin Oncol 31(11):1415–1421. doi:10.1200/JCO.2012.46.3299 CrossRefPubMed Martins RG, Parvathaneni U, Bauman JE, Sharma AK, Raez LE, Papagikos MA, Yunus F, Kurland BF, Eaton KD, Liao JJ, Mendez E, Futran N, Wang DX, Chai X, Wallace SG, Austin M, Schmidt R, Hayes DN (2013) Cisplatin and radiotherapy with or without erlotinib in locally advanced squamous cell carcinoma of the head and neck: a randomized phase II trial. J Clin Oncol 31(11):1415–1421. doi:10.​1200/​JCO.​2012.​46.​3299 CrossRefPubMed
15.
go back to reference Gross ND, Bauman JE, Gooding WE, Denq W, Thomas SM, Wang L, Chiosea S, Hood BL, Flint MS, Sun M, Conrads TP, Ferris RL, Johnson JT, Kim S, Argiris A, Wirth L, Nikiforova MN, Siegfried JM, Grandis JR (2014) Erlotinib, erlotinib-sulindac versus placebo: a randomized, double-blind, placebo-controlled window trial in operable head and neck cancer. Clin Cancer Res 20(12):3289–3298. doi:10.1158/1078-0432.CCR-13-3360 CrossRefPubMedPubMedCentral Gross ND, Bauman JE, Gooding WE, Denq W, Thomas SM, Wang L, Chiosea S, Hood BL, Flint MS, Sun M, Conrads TP, Ferris RL, Johnson JT, Kim S, Argiris A, Wirth L, Nikiforova MN, Siegfried JM, Grandis JR (2014) Erlotinib, erlotinib-sulindac versus placebo: a randomized, double-blind, placebo-controlled window trial in operable head and neck cancer. Clin Cancer Res 20(12):3289–3298. doi:10.​1158/​1078-0432.​CCR-13-3360 CrossRefPubMedPubMedCentral
16.
go back to reference Rosenthal EL, Chung TK, Carroll WR, Clemons L, Desmond R, Nabell L (2014) Assessment of Erlotinib as adjuvant chemoprevention in high-risk head and neck cancer patients. Ann Surg Oncol. doi:10.1245/s10434-014-3878-0 Rosenthal EL, Chung TK, Carroll WR, Clemons L, Desmond R, Nabell L (2014) Assessment of Erlotinib as adjuvant chemoprevention in high-risk head and neck cancer patients. Ann Surg Oncol. doi:10.​1245/​s10434-014-3878-0
17.
go back to reference Saba NF, Hurwitz SJ, Kono SA, Yang CS, Zhao Y, Chen Z, Sica G, Muller S, Moreno-Williams R, Lewis M, Grist W, Chen AY, Moore CE, Owonikoko TK, Ramalingam S, Beitler JJ, Nannapaneni S, Shin HJ, Grandis JR, Khuri FR, Chen ZG, Shin DM (2014) Chemoprevention of head and neck cancer with celecoxib and erlotinib: results of a phase ib and pharmacokinetic study. Cancer Prev Res (Phila) 7(3):283–291. doi:10.1158/1940-6207.CAPR-13-0215 CrossRef Saba NF, Hurwitz SJ, Kono SA, Yang CS, Zhao Y, Chen Z, Sica G, Muller S, Moreno-Williams R, Lewis M, Grist W, Chen AY, Moore CE, Owonikoko TK, Ramalingam S, Beitler JJ, Nannapaneni S, Shin HJ, Grandis JR, Khuri FR, Chen ZG, Shin DM (2014) Chemoprevention of head and neck cancer with celecoxib and erlotinib: results of a phase ib and pharmacokinetic study. Cancer Prev Res (Phila) 7(3):283–291. doi:10.​1158/​1940-6207.​CAPR-13-0215 CrossRef
19.
go back to reference Hartmann S, Kriegebaum U, Kuchler N, Brands RC, Linz C, Kubler AC, Muller-Richter UD (2013) Correlation of MAGE-A tumor antigens and the efficacy of various chemotherapeutic agents in head and neck carcinoma cells. Clin Oral Investig. doi:10.1007/s00784-013-0936-0 PubMedCentral Hartmann S, Kriegebaum U, Kuchler N, Brands RC, Linz C, Kubler AC, Muller-Richter UD (2013) Correlation of MAGE-A tumor antigens and the efficacy of various chemotherapeutic agents in head and neck carcinoma cells. Clin Oral Investig. doi:10.​1007/​s00784-013-0936-0 PubMedCentral
20.
go back to reference Hartmann S, Kriegebaum U, Lessner G, Brands RC, Linz C, Schneider T, Kubler AC, Muller-Richter UD (2013) Efficacy of cetuximab and panitumumab in oral squamous cell carcinoma cell lines: prognostic value of MAGE-A subgroups for treatment success. J Craniomaxillofac Surg Hartmann S, Kriegebaum U, Lessner G, Brands RC, Linz C, Schneider T, Kubler AC, Muller-Richter UD (2013) Efficacy of cetuximab and panitumumab in oral squamous cell carcinoma cell lines: prognostic value of MAGE-A subgroups for treatment success. J Craniomaxillofac Surg
21.
go back to reference Heo DS, Snyderman C, Gollin SM, Pan S, Walker E, Deka R, Barnes EL, Johnson JT, Herberman RB, Whiteside TL (1989) Biology, cytogenetics, and sensitivity to immunological effector cells of new head and neck squamous cell carcinoma lines. Cancer Res 49(18):5167–5175PubMed Heo DS, Snyderman C, Gollin SM, Pan S, Walker E, Deka R, Barnes EL, Johnson JT, Herberman RB, Whiteside TL (1989) Biology, cytogenetics, and sensitivity to immunological effector cells of new head and neck squamous cell carcinoma lines. Cancer Res 49(18):5167–5175PubMed
23.
go back to reference Mukohara T, Engelman JA, Hanna NH, Yeap BY, Kobayashi S, Lindeman N, Halmos B, Pearlberg J, Tsuchihashi Z, Cantley LC, Tenen DG, Johnson BE, Janne PA (2005) Differential effects of gefitinib and cetuximab on non-small-cell lung cancers bearing epidermal growth factor receptor mutations. J Natl Cancer Inst 97(16):1185–1194CrossRefPubMed Mukohara T, Engelman JA, Hanna NH, Yeap BY, Kobayashi S, Lindeman N, Halmos B, Pearlberg J, Tsuchihashi Z, Cantley LC, Tenen DG, Johnson BE, Janne PA (2005) Differential effects of gefitinib and cetuximab on non-small-cell lung cancers bearing epidermal growth factor receptor mutations. J Natl Cancer Inst 97(16):1185–1194CrossRefPubMed
25.
go back to reference Huang SM, Bock JM, Harari PM (1999) Epidermal growth factor receptor blockade with C225 modulates proliferation, apoptosis, and radiosensitivity in squamous cell carcinomas of the head and neck. Cancer Res 59(8):1935–1940PubMed Huang SM, Bock JM, Harari PM (1999) Epidermal growth factor receptor blockade with C225 modulates proliferation, apoptosis, and radiosensitivity in squamous cell carcinomas of the head and neck. Cancer Res 59(8):1935–1940PubMed
26.
go back to reference Baselga J, Pfister D, Cooper MR, Cohen R, Burtness B, Bos M, D’Andrea G, Seidman A, Norton L, Gunnett K, Falcey J, Anderson V, Waksal H, Mendelsohn J (2000) Phase I studies of anti-epidermal growth factor receptor chimeric antibody C225 alone and in combination with cisplatin. J Clin Oncol 18(4):904–914PubMed Baselga J, Pfister D, Cooper MR, Cohen R, Burtness B, Bos M, D’Andrea G, Seidman A, Norton L, Gunnett K, Falcey J, Anderson V, Waksal H, Mendelsohn J (2000) Phase I studies of anti-epidermal growth factor receptor chimeric antibody C225 alone and in combination with cisplatin. J Clin Oncol 18(4):904–914PubMed
27.
go back to reference Licitra L, Storkel S, Kerr KM, Van Cutsem E, Pirker R, Hirsch FR, Vermorken JB, von Heydebreck A, Esser R, Celik I, Ciardiello F (2013) Predictive value of epidermal growth factor receptor expression for first-line chemotherapy plus cetuximab in patients with head and neck and colorectal cancer: analysis of data from the EXTREME and CRYSTAL studies. Eur J Cancer 49(6):1161–1168. doi:10.1016/j.ejca.2012.11.018 CrossRefPubMed Licitra L, Storkel S, Kerr KM, Van Cutsem E, Pirker R, Hirsch FR, Vermorken JB, von Heydebreck A, Esser R, Celik I, Ciardiello F (2013) Predictive value of epidermal growth factor receptor expression for first-line chemotherapy plus cetuximab in patients with head and neck and colorectal cancer: analysis of data from the EXTREME and CRYSTAL studies. Eur J Cancer 49(6):1161–1168. doi:10.​1016/​j.​ejca.​2012.​11.​018 CrossRefPubMed
29.
go back to reference Hartmann S, Seher A, Brands RC, Linz C, Lessner G, Bohm H, Kubler AC, Muller-Richter UD (2014) Influence of epidermal growth factor receptor expression on the cetuximab and panitumumab response rates of head and neck carcinoma cells. J Craniomaxillofac Surg Hartmann S, Seher A, Brands RC, Linz C, Lessner G, Bohm H, Kubler AC, Muller-Richter UD (2014) Influence of epidermal growth factor receptor expression on the cetuximab and panitumumab response rates of head and neck carcinoma cells. J Craniomaxillofac Surg
30.
go back to reference Weber RS, Pathak S, Frankenthaler R, Gallick GE, Sacks PG (1988) Effect of epidermal growth factor (EGF) on a newly established head and neck squamous carcinoma cell line. Otolaryngol Head Neck Surg 99(6):567–573PubMed Weber RS, Pathak S, Frankenthaler R, Gallick GE, Sacks PG (1988) Effect of epidermal growth factor (EGF) on a newly established head and neck squamous carcinoma cell line. Otolaryngol Head Neck Surg 99(6):567–573PubMed
31.
go back to reference Hambek M, Werner C, Baghi M, Gstottner W, Knecht R (2006) Prestimulation of head and neck cancer cells with growth factors enhances treatment efficacy. Anticancer Res 26(2A):1091–1095PubMed Hambek M, Werner C, Baghi M, Gstottner W, Knecht R (2006) Prestimulation of head and neck cancer cells with growth factors enhances treatment efficacy. Anticancer Res 26(2A):1091–1095PubMed
32.
go back to reference Hambek M, Werner C, Baghi M, Gstottner W, Knecht R (2007) Enhancement of docetaxel efficacy in head and neck cancer treatment by G0 cell stimulation. Eur J Cancer 43(10):1502–1507CrossRefPubMed Hambek M, Werner C, Baghi M, Gstottner W, Knecht R (2007) Enhancement of docetaxel efficacy in head and neck cancer treatment by G0 cell stimulation. Eur J Cancer 43(10):1502–1507CrossRefPubMed
33.
go back to reference Mandic R, Rodgarkia-Dara CJ, Krohn V, Wiegand S, Grenman R, Werner JA (2009) Cisplatin resistance of the HNSCC cell line UT-SCC-26A can be overcome by stimulation of the EGF-receptor. Anticancer Res 29(4):1181–1187PubMed Mandic R, Rodgarkia-Dara CJ, Krohn V, Wiegand S, Grenman R, Werner JA (2009) Cisplatin resistance of the HNSCC cell line UT-SCC-26A can be overcome by stimulation of the EGF-receptor. Anticancer Res 29(4):1181–1187PubMed
34.
go back to reference Hartmann S, Kriegebaum U, Kuchler N, Brands RC, Linz C, Kubler AC, Muller-Richter UD (2014) Correlation of MAGE-A tumor antigens and the efficacy of various chemotherapeutic agents in head and neck carcinoma cells. Clin Oral Investig 18(1):189–197. doi:10.1007/s00784-013-0936-0 CrossRefPubMed Hartmann S, Kriegebaum U, Kuchler N, Brands RC, Linz C, Kubler AC, Muller-Richter UD (2014) Correlation of MAGE-A tumor antigens and the efficacy of various chemotherapeutic agents in head and neck carcinoma cells. Clin Oral Investig 18(1):189–197. doi:10.​1007/​s00784-013-0936-0 CrossRefPubMed
35.
go back to reference Srivastava RM, Lee SC, Andrade Filho PA, Lord CA, Jie HB, Davidson HC, Lopez-Albaitero A, Gibson SP, Gooding WE, Ferrone S, Ferris RL (2013) Cetuximab-activated natural killer and dendritic cells collaborate to trigger tumor antigen-specific T-cell immunity in head and neck cancer patients. Clin Cancer Res 19(7):1858–1872. doi:10.1158/1078-0432.CCR-12-2426 CrossRefPubMedPubMedCentral Srivastava RM, Lee SC, Andrade Filho PA, Lord CA, Jie HB, Davidson HC, Lopez-Albaitero A, Gibson SP, Gooding WE, Ferrone S, Ferris RL (2013) Cetuximab-activated natural killer and dendritic cells collaborate to trigger tumor antigen-specific T-cell immunity in head and neck cancer patients. Clin Cancer Res 19(7):1858–1872. doi:10.​1158/​1078-0432.​CCR-12-2426 CrossRefPubMedPubMedCentral
36.
go back to reference Lynch TJ, Bell DW, Sordella R, Gurubhagavatula S, Okimoto RA, Brannigan BW, Harris PL, Haserlat SM, Supko JG, Haluska FG, Louis DN, Christiani DC, Settleman J, Haber DA (2004) Activating mutations in the epidermal growth factor receptor underlying responsiveness of non-small-cell lung cancer to gefitinib. N Engl J Med 350(21):2129–2139. doi:10.1056/NEJMoa040938 CrossRefPubMed Lynch TJ, Bell DW, Sordella R, Gurubhagavatula S, Okimoto RA, Brannigan BW, Harris PL, Haserlat SM, Supko JG, Haluska FG, Louis DN, Christiani DC, Settleman J, Haber DA (2004) Activating mutations in the epidermal growth factor receptor underlying responsiveness of non-small-cell lung cancer to gefitinib. N Engl J Med 350(21):2129–2139. doi:10.​1056/​NEJMoa040938 CrossRefPubMed
37.
go back to reference Tsao MS, Sakurada A, Cutz JC, Zhu CQ, Kamel-Reid S, Squire J, Lorimer I, Zhang T, Liu N, Daneshmand M, Marrano P, da Cunha Santos G, Lagarde A, Richardson F, Seymour L, Whitehead M, Ding K, Pater J, Shepherd FA (2005) Erlotinib in lung cancer—molecular and clinical predictors of outcome. N Engl J Med 353(2):133–144CrossRefPubMed Tsao MS, Sakurada A, Cutz JC, Zhu CQ, Kamel-Reid S, Squire J, Lorimer I, Zhang T, Liu N, Daneshmand M, Marrano P, da Cunha Santos G, Lagarde A, Richardson F, Seymour L, Whitehead M, Ding K, Pater J, Shepherd FA (2005) Erlotinib in lung cancer—molecular and clinical predictors of outcome. N Engl J Med 353(2):133–144CrossRefPubMed
38.
39.
go back to reference Smilek P, Neuwirthova J, Jarkovsky J, Dusek L, Rottenberg J, Kostrica R, Srovnal J, Hajduch M, Drabek J, Klozar J (2012) Epidermal growth factor receptor (EGFR) expression and mutations in the EGFR signaling pathway in correlation with anti-EGFR therapy in head and neck squamous cell carcinomas. Neoplasma 59(5):508–515. doi:10.4149/neo_2012_065 CrossRefPubMed Smilek P, Neuwirthova J, Jarkovsky J, Dusek L, Rottenberg J, Kostrica R, Srovnal J, Hajduch M, Drabek J, Klozar J (2012) Epidermal growth factor receptor (EGFR) expression and mutations in the EGFR signaling pathway in correlation with anti-EGFR therapy in head and neck squamous cell carcinomas. Neoplasma 59(5):508–515. doi:10.​4149/​neo_​2012_​065 CrossRefPubMed
41.
go back to reference Jhawer M, Goel S, Wilson AJ, Montagna C, Ling YH, Byun DS, Nasser S, Arango D, Shin J, Klampfer L, Augenlicht LH, Perez-Soler R, Mariadason JM (2008) PIK3CA mutation/PTEN expression status predicts response of colon cancer cells to the epidermal growth factor receptor inhibitor cetuximab. Cancer Res 68(6):1953–1961. doi:10.1158/0008-5472.CAN-07-5659 CrossRefPubMedPubMedCentral Jhawer M, Goel S, Wilson AJ, Montagna C, Ling YH, Byun DS, Nasser S, Arango D, Shin J, Klampfer L, Augenlicht LH, Perez-Soler R, Mariadason JM (2008) PIK3CA mutation/PTEN expression status predicts response of colon cancer cells to the epidermal growth factor receptor inhibitor cetuximab. Cancer Res 68(6):1953–1961. doi:10.​1158/​0008-5472.​CAN-07-5659 CrossRefPubMedPubMedCentral
Metadata
Title
Erlotinib and gefitinib responsiveness in head and neck cancer cell lines—a comparing analysis with cetuximab
Authors
Stefan Hartmann
Norbert Neckel
Axel Seher
Grit Mutzbauer
Roman C. Brands
Christian Linz
Alexander C. Kübler
Urs D. A. Müller-Richter
Publication date
01-05-2016
Publisher
Springer Berlin Heidelberg
Published in
Clinical Oral Investigations / Issue 4/2016
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI
https://doi.org/10.1007/s00784-015-1566-5

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