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Chan DLH, Segelov E, Wong RSH, Smith A, Herbertson RA, Li BT, Tebbutt N, Price T, Pavlakis N. Epidermal growth factor receptor (EGFR) inhibitors for metastatic colorectal cancer. Cochrane Database Syst Rev 2017; 6:CD007047. [PMID: 28654140 PMCID: PMC6481896 DOI: 10.1002/14651858.cd007047.pub2] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Epidermal growth factor receptor (EGFR) inhibitors prevent cell growth and have shown benefit in the treatment of metastatic colorectal cancer, whether used as single agents or in combination with chemotherapy. Clear benefit has been shown in trials of EGFR monoclonal antibodies (EGFR MAb) but not EGFR tyrosine kinase inhibitors (EGFR TKI). However, there is ongoing debate as to which patient populations gain maximum benefit from EGFR inhibition and where they should be used in the metastatic colorectal cancer treatment paradigm to maximise efficacy and minimise toxicity. OBJECTIVES To determine the efficacy, safety profile, and potential harms of EGFR inhibitors in the treatment of people with metastatic colorectal cancer when given alone, in combination with chemotherapy, or with other biological agents.The primary outcome of interest was progression-free survival; secondary outcomes included overall survival, tumour response rate, quality of life, and adverse events. SEARCH METHODS We searched the Cochrane Central Register of Controlled Trials (CENTRAL), the Cochrane Library, Issue 9, 2016; Ovid MEDLINE (from 1950); and Ovid Embase (from 1974) on 9 September 2016; and ClinicalTrials.gov and the World Health Organization International Clinical Trials Registry Platform (WHO ICTRP) on 14 March 2017. We also searched proceedings from the major oncology conferences ESMO, ASCO, and ASCO GI from 2012 to December 2016. We further scanned reference lists from eligible publications and contacted corresponding authors for trials for further information where needed. SELECTION CRITERIA We included randomised controlled trials on participants with metastatic colorectal cancer comparing: 1) the combination of EGFR MAb and 'standard therapy' (whether chemotherapy or best supportive care) to standard therapy alone, 2) the combination of EGFR TKI and standard therapy to standard therapy alone, 3) the combination of EGFR inhibitor (whether MAb or TKI) and standard therapy to another EGFR inhibitor (or the same inhibitor with a different dosing regimen) and standard therapy, or 4) the combination of EGFR inhibitor (whether MAb or TKI), anti-angiogenic therapy, and standard therapy to anti-angiogenic therapy and standard therapy alone. DATA COLLECTION AND ANALYSIS We used standard methodological procedures defined by Cochrane. Summary statistics for the endpoints used hazard ratios (HR) with 95% confidence intervals (CI) for overall survival and progression-free survival, and odds ratios (OR) for response rate (RR) and toxicity. Subgroup analyses were performed by Kirsten rat sarcoma viral oncogene homolog (KRAS) and neuroblastoma RAS viral (V-Ras) oncogene homolog (NRAS) status - firstly by status of KRAS exon 2 testing (mutant or wild type) and also by status of extended KRAS/NRAS testing (any mutation present or wild type). MAIN RESULTS We identified 33 randomised controlled trials for analysis (15,025 participants), including trials of both EGFR MAb and EGFR TKI. Looking across studies, significant risk of bias was present, particularly with regard to the risk of selection bias (15/33 unclear risk, 1/33 high risk), performance bias (9/33 unclear risk, 9/33 high risk), and detection bias (7/33 unclear risk, 11/33 high risk).The addition of EGFR MAb to standard therapy in the KRAS exon 2 wild-type population improves progression-free survival (HR 0.70, 95% CI 0.60 to 0.82; high-quality evidence), overall survival (HR 0.88, 95% CI 0.80 to 0.98; high-quality evidence), and response rate (OR 2.41, 95% CI 1.70 to 3.41; high-quality evidence). We noted evidence of significant statistical heterogeneity in all three of these analyses (progression-free survival: I2 = 76%; overall survival: I2 = 40%; and response rate: I2 = 77%), likely due to pooling of studies investigating EGFR MAb use in different lines of therapy. Rates of overall grade 3 to 4 toxicity, diarrhoea, and rash were increased (moderate-quality evidence for all three outcomes), but there was no evidence for increased rates of neutropenia.For the extended RAS wild-type population (no mutations in KRAS or NRAS), addition of EGFR MAb improved progression-free survival (HR 0.60, 95% CI 0.48 to 0.75; moderate-quality evidence) and overall survival (HR 0.77, 95% CI 0.67 to 0.88; high-quality evidence). Response rate was also improved (OR 4.28, 95% CI 2.61 to 7.03; moderate-quality evidence). We noted significant statistical heterogeneity in the progression-free survival analysis (I2 = 61%), likely due to the pooling of studies combining EGFR MAb with chemotherapy with monotherapy studies.We observed no evidence of a statistically significant difference when EGFR MAb was compared to bevacizumab, in progression-free survival (HR 1.02, 95% CI 0.93 to 1.12; high quality evidence) or overall survival (HR 0.84, 95% CI 0.70 to 1.01; moderate-quality evidence). We noted significant statistical heterogeneity in the overall survival analysis (I2 = 51%), likely due to the pooling of first-line and second-line studies.The addition of EGFR TKI to standard therapy in molecularly unselected participants did not show benefit in limited data sets (meta-analysis not performed). The addition of EGFR MAb to bevacizumab plus chemotherapy in people with KRAS exon 2 wild-type metastatic colorectal cancer did not improve progression-free survival (HR 1.04, 95% CI 0.83 to 1.29; very low quality evidence), overall survival (HR 1.00, 95% CI 0.69 to 1.47; low-quality evidence), or response rate (OR 1.20, 95% CI 0.67 to 2.12; very low-quality evidence) but increased toxicity (OR 2.57, 95% CI 1.45 to 4.57; low-quality evidence). We noted significant between-study heterogeneity in most analyses.Scant information on quality of life was reported in the identified studies. AUTHORS' CONCLUSIONS The addition of EGFR MAb to either chemotherapy or best supportive care improves progression-free survival (moderate- to high-quality evidence), overall survival (high-quality evidence), and tumour response rate (moderate- to high-quality evidence), but may increase toxicity in people with KRAS exon 2 wild-type or extended RAS wild-type metastatic colorectal cancer (moderate-quality evidence). The addition of EGFR TKI to standard therapy does not improve clinical outcomes. EGFR MAb combined with bevacizumab is of no clinical value (very low-quality evidence). Future studies should focus on optimal sequencing and predictive biomarkers and collect quality of life data.
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Affiliation(s)
- David Lok Hang Chan
- Royal North Shore HospitalDepartment of Medical OncologySt LeonardsNew South WalesAustralia2065
| | - Eva Segelov
- Monash University and Monash HealthDepartment of OncologyLvl 7, MHTP building, Monash Health 240 Clayton RdClaytonVictoriaAustralia3168
| | - Rachel SH Wong
- University of SydneyDepartment of MedicineSydneyNSWAustralia2006
| | - Annabel Smith
- University of New South WalesDepartment of MedicineSydneyNSWAustralia2052
| | - Rebecca A Herbertson
- Ludwig Institute for Cancer ResearchMelbourne Centre for Clinical SciencesAustin Hospital HSB1145‐163 Studley RoadHeidelbergVictoriaAustralia3084
| | - Bob T. Li
- Memorial Sloan Kettering Cancer CenterThoracic Oncology and Early Drug Development Service1275 York AvenueNew YorkNYUSA10065
| | - Niall Tebbutt
- Olivia Newton‐John Cancer Wellness and Research Centre, Austin HospitalOlivia Newton‐John Cancer Research Institute145‐163 Studley RdHeidelbergVictoriaAustralia3084
| | - Timothy Price
- Olivia Newton‐John Cancer Wellness & Research Centre, Austin HospitalOlivia Newton‐John Cancer Research Institute, Level 5145‐163 Studley RdHeidelbergVictoriaAustralia3084
| | - Nick Pavlakis
- Royal North Shore HospitalDepartment of Medical OncologySt LeonardsNew South WalesAustralia2065
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Zoratto F, Rossi L, Giordani E, Strudel M, Papa A, Tomao S. From conventional chemotherapy to targeted therapy: use of monoclonal antibodies (moAbs) in gastrointestinal (GI) tumors. Tumour Biol 2014; 35:8471-82. [PMID: 25062724 DOI: 10.1007/s13277-014-2367-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Accepted: 07/15/2014] [Indexed: 01/05/2023] Open
Abstract
In recent years, significant progress has been made in the diagnosis and treatment of gastrointestinal cancers. Researches and clinicians however are still faced with challenges, not the least is the detection and management of tumors with varied gene mutation status. Clarification of the molecular pathology of gastrointestinal cancers may improve treatment options as well as quality of life and the long-term survival of this patient class. Therefore, molecular-targeted therapies have emerged as clinically useful drugs for gastrointestinal cancers cure, and predictive biomarkers have been heralded as the way to develop the right drug for the right patient. Moving from such appealing molecular background, we wrote an overview of the main targeted therapies, with particular interest to monoclonal antibodies that have already been approved in clinical practice or are being tested in gastrointestinal cancers treatment.
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Mikhail S, Bekaii-Saab T. RAS mutations: impact on treatment outcome. Colorectal Cancer 2013. [DOI: 10.2217/crc.13.63] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
SUMMARY RAS proteins belong to the MAPK network, an essential pathway for maintenance of normal vital processes such as proliferation and differentiation. RAS mutations are observed in 30–50% of colorectal carcinomas. The MAPK pathway and RAS proteins are part of a complex system that mediate signaling from the EGF receptors (EGFRs). Our review discusses the most recent evidence highlighting the role of KRAS mutations in patients who are offered anti-EGFR therapy. Furthermore, we discuss emerging evidence of the role of other predictive markers such as PI3K, PTEN, BRAF, NRAS, MET, IGFR-1 and p53 in patients who are receiving anti-EGFR therapy.
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Affiliation(s)
- Sameh Mikhail
- The Ohio State University Wexner Medical Center – James Cancer Hospital & Solove Research Institute, 320 W 10th Avenue, Columbus, OH 43210, USA
| | - Tanios Bekaii-Saab
- The Ohio State University Wexner Medical Center – James Cancer Hospital & Solove Research Institute, 320 W 10th Avenue, Columbus, OH 43210, USA
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Price TJ, Segelov E, Burge M, Haller DG, Ackland SP, Tebbutt NC, Karapetis CS, Pavlakis N, Sobrero AF, Cunningham D, Shapiro JD. Current opinion on optimal treatment for colorectal cancer. Expert Rev Anticancer Ther 2013; 13:597-611. [PMID: 23617351 DOI: 10.1586/era.13.37] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The medical treatment of colorectal cancer (CRC) has evolved greatly in the last 10 years, involving complex combined chemotherapy protocols and, in more recent times, new biologic agents. Advances in adjuvant therapy have been limited to the addition of oxaliplatin and the substitution of oral fluoropyrimidine (e.g., capecitabine) for intravenous 5-fluorouracil with no evidence for improved outcome with biological agents. Clinical benefit from the use of the targeted monoclonal antibodies, bevacizumab, cetuximab and panitumumab, in the treatment of metastatic CRC is now well established, but the optimal timing of their use requires careful consideration to derive the maximal benefit. Evidence to date suggests potentially distinct roles for bevacizumab and EGF receptor-targeted biological agents (cetuximab and panitumumab) in the treatment of metastatic CRC. This article reviews the evidence in support of modern treatments for CRC and the decision-making behind the treatment choices, their benefits and toxicities.
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Affiliation(s)
- Timothy J Price
- The Queen Elizabeth Hospital, Adelaide Colorectal Tumour Group and University of Adelaide, Adelaide, South Australia, Australia.
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Schmoll HJ, Van Cutsem E, Stein A, Valentini V, Glimelius B, Haustermans K, Nordlinger B, van de Velde CJ, Balmana J, Regula J, Nagtegaal ID, Beets-Tan RG, Arnold D, Ciardiello F, Hoff P, Kerr D, Köhne CH, Labianca R, Price T, Scheithauer W, Sobrero A, Tabernero J, Aderka D, Barroso S, Bodoky G, Douillard JY, El Ghazaly H, Gallardo J, Garin A, Glynne-Jones R, Jordan K, Meshcheryakov A, Papamichail D, Pfeiffer P, Souglakos I, Turhal S, Cervantes A. ESMO Consensus Guidelines for management of patients with colon and rectal cancer. a personalized approach to clinical decision making. Ann Oncol 2012; 23:2479-2516. [PMID: 23012255 DOI: 10.1093/annonc/mds236] [Citation(s) in RCA: 1034] [Impact Index Per Article: 86.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Colorectal cancer (CRC) is the most common tumour type in both sexes combined in Western countries. Although screening programmes including the implementation of faecal occult blood test and colonoscopy might be able to reduce mortality by removing precursor lesions and by making diagnosis at an earlier stage, the burden of disease and mortality is still high. Improvement of diagnostic and treatment options increased staging accuracy, functional outcome for early stages as well as survival. Although high quality surgery is still the mainstay of curative treatment, the management of CRC must be a multi-modal approach performed by an experienced multi-disciplinary expert team. Optimal choice of the individual treatment modality according to disease localization and extent, tumour biology and patient factors is able to maintain quality of life, enables long-term survival and even cure in selected patients by a combination of chemotherapy and surgery. Treatment decisions must be based on the available evidence, which has been the basis for this consensus conference-based guideline delivering a clear proposal for diagnostic and treatment measures in each stage of rectal and colon cancer and the individual clinical situations. This ESMO guideline is recommended to be used as the basis for treatment and management decisions.
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Affiliation(s)
- H J Schmoll
- Department of Oncology/Haematology, Martin Luther University Halle, Germany.
| | - E Van Cutsem
- Digestive Oncology Unit, University Hospital Gasthuisberg, Leuven, Belgium
| | - A Stein
- Hubertus Wald Tumor Center, University Comprehensive Cancer Center, Hamburg-Eppendorf, Germany
| | - V Valentini
- Department of Radiotherapy, Policlinico Universitario "A. Gemelli," Catholic University, Rome, Italy
| | - B Glimelius
- Department of Radiology, Oncology and Radiation Sciences, Uppsala University, Uppsala; Department of Oncology and Pathology, Karolinska Institutet, Stockholm, Sweden
| | - K Haustermans
- Department of Radiation Oncology, University Hospitals Leuven Campus Gasthuisberg, Leuven, Belgium
| | - B Nordlinger
- Department of Surgery, Assistance-Publique-Hôpitaux de Paris, Hôpital Ambroise Paré,Boulogne; Université Versailles Saint Quentin en Yvelines, Versailles, France
| | - C J van de Velde
- Department of Surgery, Leiden University Medical Center, Leiden, The Netherlands
| | - J Balmana
- Department of Medical Oncology, University Hospital Vall d'Hebron, Barcelona, Spain
| | - J Regula
- Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw, Poland
| | - I D Nagtegaal
- Department of Pathology, Radboud University Nijmegen Medical Center, Nijmegen
| | - R G Beets-Tan
- Department of Radiology, University Hospital of Maastricht, Maastricht, The Netherlands
| | - D Arnold
- Hubertus Wald Tumor Center, University Comprehensive Cancer Center, Hamburg-Eppendorf, Germany
| | - F Ciardiello
- Division of Medical Oncology, Department of Experimental and Clinical Medicine and Surgery "F. Magrassi and A. Lanzara", Second University of Naples, Naples, Italy
| | - P Hoff
- Hospital Sírio Libanês, Sao Paulo, Brazil; Instituto do Câncer do Estado de São Paulo, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - D Kerr
- Department of Clinical Pharmacology, University of Oxford, Oxford, UK
| | - C H Köhne
- Department for Oncology/Haematology, Klinikum Oldenburg, Oldenburg, Germany
| | - R Labianca
- Department of Haematology and Oncology, Ospedali Riuniti, Bergamo, Italy
| | - T Price
- Department of Medical Oncology, The Queen Elizabeth Hospital, Woodville, Australia
| | - W Scheithauer
- Department of Medicine I, Division of Oncology, Medical University of Vienna, Vienna, Austria
| | - A Sobrero
- Oncologia Medica, Ospedale S. Martino, Genova, Italy
| | - J Tabernero
- Department of Medical Oncology, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - D Aderka
- Division of Oncology, Sheba Medical Center, Tel-Hashomer, Israel
| | - S Barroso
- Serviço de Oncologia Médica, Hospital do Espirito Santo de Evora, Evora, Portugal
| | - G Bodoky
- Department of Clinical Oncology, St. László Teaching Hospital, Budapest, Hungary
| | - J Y Douillard
- Service d'oncologie médicale, institut de Cancérologie de l'Ouest-René Gauducheau, Saint-Herblain, France
| | - H El Ghazaly
- Department of Oncology, Ain Shams University, Cairo, Egypt
| | - J Gallardo
- Department of Oncology, Clínica Alemana, INTOP, Santiago, Chile
| | - A Garin
- N. N. Blokhin Russian Cancer Research Center, Moscow, Russia
| | - R Glynne-Jones
- Department of Radiotherapy, Mount Vernon Hospital, Northwood, UK
| | - K Jordan
- Department of Oncology/Haematology, Martin Luther University Halle, Germany
| | - A Meshcheryakov
- N. N. Blokhin Russian Cancer Research Center, Moscow, Russia
| | - D Papamichail
- Department of Medical Oncology, Bank of Cyprus Oncology Centre, Nicosia, Cyprus
| | - P Pfeiffer
- Department of Oncology, Odense University Hospital, Odense, Denmark
| | - I Souglakos
- Department of Medical Oncology, School of Medicine, University of Crete, Heraklion, Greece
| | - S Turhal
- Department of Medical Oncology, Marmara University Hospital, Istanbul, Turkey
| | - A Cervantes
- Department of Hematology and Medical Oncology, INCLIVA Health Research Institute, University of Valencia, Valencia, Spain
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Modest DP, Giessen C, Stintzing S. Predictors of EGF receptor monoclonal antibody activity in metastatic colorectal cancer: current status. Colorectal Cancer 2012. [DOI: 10.2217/crc.12.54] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
SUMMARY In the treatment of metastatic colorectal cancer, the cytostatic drugs 5-fluorouracil, irinotecan and oxaliplatin, as well as the VEGF antibody bevacizumab, are applied without the use of predictive biomarkers. To date, KRAS mutational status is the only accepted predictive biomarker, limiting the use of the EGF receptor (EGFR) monoclonal antibodies cetuximab and panitumumab to patients with KRAS wild-type tumors. The different KRAS mutations on codons 12 and 13 represent a negative predictive biomarker with poor positive predictive power. The negative predictive value of KRAS mutations has been questioned by several retrospective analyses of clinical trials, hypothesizing variable efficacies of EGFR antibodies associated with the diverse range of mutations. While the BRAF mutation is associated with a negative prognosis, its predictive value in the context of EGFR monoclonal antibody therapy is not fully understood. The present review aims to outline possible clinical and molecular biomarkers of EGFR monoclonal antibodies in metastatic colorectal cancer.
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Affiliation(s)
- Dominik Paul Modest
- Department of Medical Oncology & Comprehensive Cancer Center, Ludwig-Maximilians-Universität Munich, Germany
| | - Clemens Giessen
- Department of Medical Oncology & Comprehensive Cancer Center, Ludwig-Maximilians-Universität Munich, Germany
| | - Sebastian Stintzing
- Department of Medical Oncology & Comprehensive Cancer Center, Ludwig-Maximilians-Universität Munich, Germany
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8
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Schmoll H, Van Cutsem E, Stein A, Valentini V, Glimelius B, Haustermans K, Nordlinger B, van de Velde C, Balmana J, Regula J, Nagtegaal I, Beets-Tan R, Arnold D, Ciardiello F, Hoff P, Kerr D, Köhne C, Labianca R, Price T, Scheithauer W, Sobrero A, Tabernero J, Aderka D, Barroso S, Bodoky G, Douillard J, El Ghazaly H, Gallardo J, Garin A, Glynne-Jones R, Jordan K, Meshcheryakov A, Papamichail D, Pfeiffer P, Souglakos I, Turhal S, Cervantes A. ESMO Consensus Guidelines for management of patients with colon and rectal cancer. A personalized approach to clinical decision making. Ann Oncol 2012. [DOI: 78495111110.1093/annonc/mds236' target='_blank'>'"<>78495111110.1093/annonc/mds236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [78495111110.1093/annonc/mds236','', '10.1200/jco.2011.29.15_suppl.3523')">Reference Citation Analysis] [78495111110.1093/annonc/mds236', 8)">What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
78495111110.1093/annonc/mds236" />
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9
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Argiles G, Dienstmann R, Elez E, Tabernero J. Panitumumab: a summary of clinical development in colorectal cancer and future directions. Future Oncol 2012; 8:373-89. [PMID: 22515440 DOI: 10.2217/fon.12.20] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Panitumumab is a fully human, monoclonal antibody targeting the EGF receptor with proven clinical activity in KRAS wild-type metastatic colorectal carcinoma. Treatment with panitumumab has been shown to significantly improve response rate and progression-free survival in this subgroup of patients, with a manageable toxicity profile. Panitumumab's first worldwide indication was as a single agent in chemorefractory patients. Recently, the EMA approved its use as part of a chemotherapy regimen in first- and second-line settings, following the encouraging results of large randomized Phase III trials. In order to identify patients with higher chances of benefiting from the treatment, additional molecular aberrations in the EGF receptor signaling pathway are being investigated as predictive biomarkers. In this article we review 10 years of drug development, focusing on the clinical evidence for panitumumab's indication in metastatic colorectal cancer and future strategies of investigation.
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Affiliation(s)
- Guillem Argiles
- Medical Oncology Department, Valld'Hebron University Hospital, P. Valld'Hebron, 119-129, 08035 Barcelona, Spain
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Clarke SJ, Karapetis CS, Gibbs P, Pavlakis N, Desai J, Michael M, Tebbutt NC, Price TJ, Tabernero J. Overview of biomarkers in metastatic colorectal cancer: tumour, blood and patient-related factors. Crit Rev Oncol Hematol 2012; 85:121-35. [PMID: 22762963 DOI: 10.1016/j.critrevonc.2012.06.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Revised: 05/31/2012] [Accepted: 06/07/2012] [Indexed: 02/07/2023] Open
Abstract
During the last 20 years there have been major therapeutic developments in colorectal cancer (CRC) with the introduction of multiple novel therapeutic agents into routine clinical practice. This has improved survival in both the adjuvant and advanced disease settings. However, improvements have come with substantial increases in expense to the community and potential toxicity to the patient. There has been substantial research to identify tumour factors in CRC that predict treatment response and survival outcomes. This research has identified clinically useful predictive biomarkers to aid clinical decision making, such as the presence or absence of KRAS gene mutations which can determine the benefit of using epidermal growth factor receptor (EGFR) inhibiting antibodies. However, less attention has been paid to the identification and impact of predictive patient-derived factors such as age, gender and the presence of comorbid conditions or evidence of a systemic inflammatory response. In this article, the current concepts of tumour and patient-related predictive factors in CRC management are reviewed.
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Affiliation(s)
- Stephen J Clarke
- Department of Medical Oncology, Royal North Shore Hospital, St Leonards, NSW, Australia.
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11
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Adams RA. Optimizing first-line chemotherapy for metastatic colorectal cancer. Colorectal Cancer 2012. [DOI: 10.2217/crc.12.21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
SUMMARY Up to half of all patients who develop colorectal cancer will be treated for metastatic disease; some can be cured but most are simply palliated. The optimum use of the available drugs tailored to the patient should be informed by evidence, where it is available, and are of much current debate. Treatment objectives must be clear in making these decisions. Improved response rate may be appropriate where disease may become resectable, with an aim for cure. Tolerability and quality of life balanced with long-term survival may be most relevant where this is not feasible. A good start appropriate to the individual in the first-line metastatic setting is of both physical and psychological importance and may affect subsequent therapeutic decisions. Where Phase III randomized controlled trial evidence is missing, clinical decisions must still be made. Here we explore the data available for optimized first-line therapy, the options created from this data and balance this against the benefits to the patient as a whole.
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Affiliation(s)
- Richard A Adams
- Cardiff University & Velindre Cancer Centre, Velindre Rd, Whitchurch, Cardiff, CF14 2TL, UK
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Abstract
Current US FDA-approved monoclonal antibodies targeting the EGF receptor (EGFR) include cetuximab and panitumumab. In this article, we discuss the clinical evidence concerning the use of monoclonal antibodies targeting the EGFR in the setting of advanced colorectal cancer and the emergence of predictive molecular biomarkers. In addition, we also consider the evidence surrounding the evolution of anti-EGFR-resistance mechanisms evoked by targeted anti-EGFR therapy and potential therapeutic strategies that may counteract resistant tumor growth.
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Affiliation(s)
- Paul H S Shaw
- Department of Pathophysiology and Repair, School of Bioscience, Cardiff, University, Museum Avenue, Cardiff, CF10 3AX, UK.
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