Minkovsky N, Berezov ABIBW-2992, a dual receptor tyrosine kinase inhibitor for the treatment of solid tumors. Curr Opin Investig Drugs 9(12): 1336-1346
The anilino-quinazoline derivative BIBW-2992, which is being developed by Boehringer Ingelheim Corp for the potential treatment of solid tumors, is an oral dual receptor tyrosine kinase inhibitor of human EGF receptor (EGFR) and human epidermal growth factor receptor-2 (HER-2)/neu. EGFR and HER-2/neu activate numerous signaling pathways leading to cancer cell proliferation, survival and migration. In vitro, BIBW-2992 effectively and selectively inhibited EGFR and HER-2/neu and inhibited EGFR and HER-2/neu total tyrosine phosphorylation and tumor cell proliferation in vivo. Importantly, BIBW-2992 was active against tumors overexpressing EGFR with the secondary Thr790Met point mutation, which confers resistance to the first-generation EGFR inhibitors gefitinib and erlotinib. In phase I/II trials, BIBW-2992 was effective in patients with solid tumors, including those with NSCLC tumors activating mutations in the EGFR tyrosine kinase domain. BIBW-2992 was generally well tolerated with the main adverse effects being gastrointestinal or cutaneous disorders. At the time of publication, BIBW-2992 was undergoing phase II trials for NSCLC, breast and prostate cancers, head and neck carcinoma, as well as glioma. BIBW-2992 was granted Fast-Track status by the FDA for NSCLC and was investigated in phase III trials for this indication.
Available from: Grzegorz Korpanty
- "Afatinib is a second-generation EGFR-TKI that irreversibly blocks EGFR and Her-2 (71, 72). LUX-Lung 3 was a phase III clinical trial of afatinib compared to cisplatin-pemetrexed chemotherapy in treatment-naïve patients with EGFR-mutant advanced lung adenocarcinoma (73). "
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ABSTRACT: Lung cancer remains the most lethal malignancy in the world. Despite improvements in surgical treatment, systemic therapy, and radiotherapy, the 5-year survival rate for all patients diagnosed with lung cancer remains between 15 and 20%. Newer therapeutic strategies rely on specific molecular alterations, or biomarkers, that provide opportunities for a personalized approach to specific patient populations. Classification of lung cancer is becoming increasingly focused on these biomarkers, which renders the term "non-small cell lung" cancer less clinically useful. Non-small cell lung cancer is now recognized as a complex malignancy and its molecular and genomic diversity allows for patient-centered treatment options. Here, we review advances in targeted treatment of lung adenocarcinoma with respect to five clinically relevant biomarkers - EGFR, ALK, MET, ROS-1, and KRAS.
Available from: sciencedirect.com
- "Lapatinib also binds the inactive conformation of EGFR (Wood et al., 2004), but it has not been active against cancers for which EGFR antibodies or TKIs are approved. Afatinib (Minkovsky and Berezov, 2008) and neratinib (Burstein et al., 2010) are irreversible, covalent HER2/EGFR TKIs with activity against HER2, HER4, "
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ABSTRACT: ERBB receptors were linked to human cancer pathogenesis approximately three decades ago. Biomedical investigators have since developed substantial understanding of the biology underlying the dependence of cancers on aberrant ERBB receptor signaling. An array of cancer-associated genetic alterations in ERBB receptors has also been identified. These findings have led to the discovery and development of mechanism-based therapies targeting ERBB receptors that have improved outcome for many cancer patients. In this Perspective, we discuss current paradigms of targeting ERBB receptors with cancer therapeutics and our understanding of mechanisms of action and resistance to these drugs. As current strategies still have limitations, we also discuss challenges and opportunities that lie ahead as basic scientists and clinical investigators work toward more breakthroughs.
Available from: Jacques De Greve
- "The efficacy of the inhibitors is limited in time due to the appearance of cells with resistance mechanisms, in nearly half of the cases a threonine-to-methionine substitution in the EGFR at amino acid position 790 (T790M). Afatinib (BIBW 2992, Boehringer Ingelheim GmbH), is an irreversible inhibitor of both EGFR, HER2 and HER4 kinases and retains some activity in tumors with T790M mutations, but at doses that are a log higher than what is needed for cancers harboring sensitizing mutations , , , , , . "
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ABSTRACT: Epidermal growth factor receptor (EGFR) and c-MET receptors are expressed on many non-small cell lung cancer (NSCLC) cells. Current single agent therapeutic targeting of a mutant EGFR has a high efficacy in the clinic, but is not curative. Here, we investigated the combination of targeting EGFR and c-MET pathways in NSCLC cells resistant to receptor tyrosine kinase inhibitors (TKIs), using RNA interference and inhibition by TKIs. Different NSCLC cell lines with various genomic characteristics (H358, H1650 and H1975) were transfected with EGFR-specific-siRNA, T790M-specific-siRNA, c-MET siRNA or the combination. Subsequently EGFR TKIs (gefitinib, erlotinib or afatinib) or monoclonal antibody cetuximab were combined respectively with the c-MET-specific TKI su11274 in NSCLC cell lines. The cell proliferation, viability, caspase-3/7 activity and apoptotic morphology were monitored by spectrophotometry, fluorimetry and fluorescence microscopy. The combined effect of EGFR TKIs, or cetuximab and su11274, was evaluated using a combination index. The results showed that the cell lines that were relatively resistant to EGFR TKIs, especially the H1975 cell line containing the resistance T790M mutation, were found to be more sensitive to EGFR-specific-siRNA. The combination of EGFR siRNA plus c-MET siRNA enhanced cell growth inhibition, apoptosis induction and inhibition of downstream signaling in EGFR TKI resistant H358, H1650 and H1975 cells, despite the absence of activity of the c-MET siRNA alone. EGFR TKIs or cetuximab plus su11274 were also consistently superior to either agent alone. The strongest biological effect was observed when afatinib, an irreversible pan-HER blocker was combined with su11274, which achieved a synergistic effect in the T790M mutant H1975 cells. In a conclusion, our findings offer preclinical proof of principle for combined inhibition as a promising treatment strategy for NSCLC, especially for patients in whom current EGFR-targeted treatments fail due to the presence of the T790M-EGFR-mutation or high c-MET expression.
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