PMID- 20959830 OWN - NLM STAT- MEDLINE DCOM- 20110301 LR - 20240404 IS - 1532-1827 (Electronic) IS - 0007-0920 (Print) IS - 0007-0920 (Linking) VI - 103 IP - 10 DP - 2010 Nov 9 TI - Phase Ib study of CP-868,596, a PDGFR inhibitor, combined with docetaxel with or without axitinib, a VEGFR inhibitor. PG - 1554-61 LID - 10.1038/sj.bjc.6605941 [doi] AB - BACKGROUND: Tumoural interstitial hypertension, possibly modulated by platelet-derived and vascular endothelial growth factor receptors (PDGFR and VEGFR), may mediate resistance to chemotherapy. METHODS: Forty-eight patients with advanced solid tumours received oral PDGFR inhibitor CP-868,596 (60-100 mg twice daily (BID)) and docetaxel (75-100 mg m(-)(2)), or CP-868,596 (60 mg BID), docetaxel (75 mg m(-)(2)), and VEGFR inhibitor axitinib (5 mg BID). RESULTS: The CP-868,596/docetaxel was escalated as above. The CP-868,596/docetaxel/axitinib was not dose escalated because of increased incidence of mucositis-like adverse events (AEs) with concurrent neutropenia relative to that expected for docetaxel. All tested regimens were tolerable, including 100 mg BID CP-868,596 (recommended phase II dose) plus 100 mg m(-)(2) docetaxel (maximum approved dose). Most treatment-emergent AEs were mild-moderate and reversible, commonly including nausea, diarrhoea, vomiting, constipation, fatigue, and anaemia (CP-868,596/docetaxel), and hypertension, lethargy, diarrhoea, and fatigue (CP-868,596/docetaxel/axitnib). Pharmacokinetics were unaffected by co-administration. Twenty-one patients achieved stable disease, including all seven evaluable on CP-868,596/docetaxel/axitinib. All nine CP-868,596/docetaxel/axitinib patients received therapy for a median of six (range, 3-16) cycles. CONCLUSIONS: The CP-868,596/docetaxel was well tolerated, but increased efficacy was not observed. Addition of axitinib delivered greater benefits than expected in the number of patients achieving prolonged stable disease with a moderate increase in AEs. FAU - Michael, M AU - Michael M AD - Peter MacCallum Cancer Centre, Consultant Medical Oncologist, Division of Haematology and Medical Oncology, Chair of GI Clinical Service, Locked Bag 1, A'Beckett Street, Victoria 8006, Australia. Michael.Michael@petermac.org FAU - Vlahovic, G AU - Vlahovic G FAU - Khamly, K AU - Khamly K FAU - Pierce, K J AU - Pierce KJ FAU - Guo, F AU - Guo F FAU - Olszanski, A J AU - Olszanski AJ LA - eng PT - Clinical Trial, Phase I PT - Journal Article PT - Multicenter Study PT - Research Support, Non-U.S. Gov't DEP - 20101019 PL - England TA - Br J Cancer JT - British journal of cancer JID - 0370635 RN - 0 (Angiogenesis Inhibitors) RN - 0 (Imidazoles) RN - 0 (Indazoles) RN - 0 (Taxoids) RN - 15H5577CQD (Docetaxel) RN - AYI8EX34EU (Creatinine) RN - C9LVQ0YUXG (Axitinib) RN - EC 2.7.10.1 (Receptors, Vascular Endothelial Growth Factor) RN - RFM9X3LJ49 (Bilirubin) SB - IM MH - Adult MH - Aged MH - Angiogenesis Inhibitors/adverse effects/therapeutic use MH - Antineoplastic Combined Chemotherapy Protocols/adverse effects/pharmacokinetics/*therapeutic use MH - Axitinib MH - Bilirubin/blood MH - Creatinine/blood MH - Docetaxel MH - Dose-Response Relationship, Drug MH - Drug Administration Schedule MH - Female MH - Humans MH - Imidazoles/adverse effects/therapeutic use MH - Indazoles/adverse effects/therapeutic use MH - Male MH - Middle Aged MH - Neoplasms/blood/*drug therapy/pathology/surgery MH - Patient Selection MH - Receptors, Vascular Endothelial Growth Factor/*antagonists & inhibitors/pharmacokinetics MH - Taxoids/adverse effects PMC - PMC2990584 EDAT- 2010/10/21 06:00 MHDA- 2011/03/02 06:00 PMCR- 2011/11/09 CRDT- 2010/10/21 06:00 PHST- 2010/10/21 06:00 [entrez] PHST- 2010/10/21 06:00 [pubmed] PHST- 2011/03/02 06:00 [medline] PHST- 2011/11/09 00:00 [pmc-release] AID - 6605941 [pii] AID - 10.1038/sj.bjc.6605941 [doi] PST - ppublish SO - Br J Cancer. 2010 Nov 9;103(10):1554-61. doi: 10.1038/sj.bjc.6605941. Epub 2010 Oct 19.