Integrating molecular diagnostics into anticancer drug discovery.
In the 1990s, the breast cancer drug trastuzumab (Herceptin; Genentech/Roche)--an antibody specific for human epidermal growth factor receptor 2 (HER2; also known as ERBB2)--was approved based on trials in which HER2 expression levels were used to select patients in clinical trials. This provided support for analogous efforts for drugs that target the epidermal growth factor receptor (EGFR). However, the development of these drugs, such as cetuximab (Erbitux; Bristol-Myers Squibb/Lilly) and gefitinib (Iressa; AstraZeneca), has revealed that EGFR expression is an insufficient and unreliable biomarker to select patients for EGFR-targeted therapies in both lung and colon cancer. Indeed, evidence on patient populations that are likely to respond to such therapies, on the basis of specific mutations in proteins of the targeted pathway, has only recently been clinically validated and incorporated into some of the drug labels. This article highlights lessons learned from the development of the first drugs targeting the EGFR family and discusses strategies to decrease the risk of failure in clinical development by more effectively integrating molecular diagnostics into anticancer drug discovery.
KPS Medical Biotechnology and Healthcare Services Ltd, 5 Ribary, 1022 Budapest, Hungary. petak@kps.hu
István
I
Peták
Richárd
R
Schwab
László
L
Orfi
László
L
Kopper
György
G
Kéri
D000818:Animals; D000970:Antineoplastic Agents / Q000494:pharmacology*; D015415:Biomarkers; D016503:Drug Delivery Systems; D055808:Drug Discovery / Q000379:methods*; D004353:Drug Evaluation, Preclinical; D066246:ErbB Receptors / Q000187:drug effects / Q000235:genetics; D006801:Humans; D025202:Molecular Diagnostic Techniques; D009369:Neoplasms / Q000175:diagnosis* / Q000188:drug therapy* / Q000235:genetics; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000187:drug effects / Q000235:genetics
D000970:Antineoplastic Agents; D015415:Biomarkers; D066246:ErbB Receptors; D018719:Erb-b2 Receptor Tyrosine Kinases; C512478:EGFR protein, human; C508053:ERBB2 protein, human