PMID- 24131779 OWN - NLM STAT- MEDLINE DCOM- 20140926 LR - 20211203 IS - 1479-5876 (Electronic) IS - 1479-5876 (Linking) VI - 11 DP - 2013 Oct 16 TI - A first-in-human, phase 1, dose-escalation study of dinaciclib, a novel cyclin-dependent kinase inhibitor, administered weekly in subjects with advanced malignancies. PG - 259 LID - 10.1186/1479-5876-11-259 [doi] AB - BACKGROUND: Dinaciclib, a small-molecule, cyclin-dependent kinase inhibitor, inhibits cell cycle progression and proliferation in various tumor cell lines in vitro. We conducted an open-label, dose-escalation study to determine the safety, tolerability, and bioactivity of dinaciclib in adults with advanced malignancies. METHODS: Dinaciclib was administered starting at a dose of 0.33 mg/m2, as a 2-hour intravenous infusion once weekly for 3 weeks (on days 1, 8, and 15 of a 28-day cycle), to determine the maximum administered dose (MAD), dose-limiting toxicities (DLTs), recommended phase 2 dose (RP2D), and safety and tolerability. Pharmacodynamics of dinaciclib were assessed using an ex vivo phytohemagglutinin lymphocyte stimulation assay and immunohistochemistry staining for retinoblastoma protein phosphorylation in skin biopsies. Evidence of antitumor activity was assessed by sequential computed tomography imaging after every 2 treatment cycles. RESULTS: Forty-eight subjects with solid tumors were treated. The MAD was found to be 14 mg/m2 and the RP2D was determined to be 12 mg/m2; DLTs at the MAD included orthostatic hypotension and elevated uric acid. Forty-seven (98%) subjects reported adverse events (AEs) across all dose levels; the most common AEs were nausea, anemia, decreased appetite, and fatigue. Dinaciclib administered at the RP2D significantly inhibited lymphocyte proliferation, demonstrating a pharmacodynamic effect. Ten subjects treated at a variety of doses achieved prolonged stable disease for at least 4 treatment cycles. CONCLUSIONS: Dinaciclib administered every week for 3 weeks (on days 1, 8, and 15 of a 28-day cycle) was generally safe and well tolerated. Initial bioactivity and observed disease stabilization support further evaluation of dinaciclib as a treatment option for patients with advanced solid malignancies. TRIAL REGISTRATION: ClinicalTrials.gov # NCT00871663. FAU - Nemunaitis, John J AU - Nemunaitis JJ AD - Mary Crowley Cancer Research Centers, 1700 Pacific Avenue, Suite 1100, Dallas, TX 75201, USA. jnemunaitis@marycrowley.org. FAU - Small, Karen A AU - Small KA FAU - Kirschmeier, Paul AU - Kirschmeier P FAU - Zhang, Da AU - Zhang D FAU - Zhu, Yali AU - Zhu Y FAU - Jou, Ying-Ming AU - Jou YM FAU - Statkevich, Paul AU - Statkevich P FAU - Yao, Siu-Long AU - Yao SL FAU - Bannerji, Rajat AU - Bannerji R LA - eng SI - ClinicalTrials.gov/NCT00871663 PT - Clinical Trial, Phase I PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20131016 PL - England TA - J Transl Med JT - Journal of translational medicine JID - 101190741 RN - 0 (Antineoplastic Agents) RN - 0 (Bridged Bicyclo Compounds, Heterocyclic) RN - 0 (Cyclic N-Oxides) RN - 0 (Indolizines) RN - 0 (Protein Kinase Inhibitors) RN - 0 (Pyridinium Compounds) RN - 4V8ECV0NBQ (dinaciclib) RN - EC 2.7.11.22 (Cyclin-Dependent Kinases) SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Antineoplastic Agents/adverse effects/pharmacokinetics/*therapeutic use MH - Bridged Bicyclo Compounds, Heterocyclic/adverse effects/pharmacokinetics/*therapeutic use MH - Cyclic N-Oxides MH - Cyclin-Dependent Kinases/*antagonists & inhibitors MH - Dose-Response Relationship, Drug MH - Female MH - Humans MH - Indolizines MH - Male MH - Middle Aged MH - Neoplasms/*drug therapy MH - Protein Kinase Inhibitors/adverse effects/pharmacokinetics/*therapeutic use MH - Pyridinium Compounds/adverse effects/pharmacokinetics/*therapeutic use PMC - PMC3853718 EDAT- 2013/10/18 06:00 MHDA- 2014/09/27 06:00 PMCR- 2013/10/16 CRDT- 2013/10/18 06:00 PHST- 2013/03/27 00:00 [received] PHST- 2013/09/24 00:00 [accepted] PHST- 2013/10/18 06:00 [entrez] PHST- 2013/10/18 06:00 [pubmed] PHST- 2014/09/27 06:00 [medline] PHST- 2013/10/16 00:00 [pmc-release] AID - 1479-5876-11-259 [pii] AID - 10.1186/1479-5876-11-259 [doi] PST - epublish SO - J Transl Med. 2013 Oct 16;11:259. doi: 10.1186/1479-5876-11-259.