A phase I pharmacokinetic study of the vascular disrupting agent ombrabulin (AVE8062) and docetaxel in advanced solid tumours.

BACKGROUND: The vascular disrupting agent ombrabulin shows synergy with docetaxel in vivo. Recommended phase II doses were determined in a dose escalation study in advanced solid tumours. METHODS: Ombrabulin (30-min infusion, day 1) followed by docetaxel (1-h infusion, day 2) every 3 weeks was explored. Ombrabulin was escalated from 11.5 to 42 mg m(-2) with 75 mg m(-2) docetaxel, then from 30 to 35 mg m(-2) with 100 mg m(-2) docetaxel. Recommended phase II dose cohorts were expanded. RESULTS: Fifty-eight patients were treated. Recommended phase II doses were 35 mg m(-2) ombrabulin with 75 mg m(-2) docetaxel (35/75 mg m(-2); 13 patients) and 30 mg m(-2) ombrabulin with 100 mg m(-2) docetaxel (30/100 mg m(-2); 16 patients). Dose-limiting toxicities were grade 3 fatigue (two patients; 42/75, 35/100), grade 3 neutropaenic infection (25/75), grade 3 headache (42/75), grade 4 febrile neutropaenia (30/100), and grade 3 thrombosis (35/100). Toxicities were consistent with each agent; mild nausea/vomiting, asthaenia/fatigue, alopecia, and anaemia were common, as were neutropaenia and leukopaenia. Diarrhoea, nail disorders and neurological symptoms were frequent at 100 mg m(-2) docetaxel. Pharmacokinetic analyses did not show any relevant drug interactions. Ten patients had partial responses (seven at 30 mg m(-2) ombrabulin), eight lasting >3 months. CONCLUSIONS: Sequential administration of ombrabulin with 75 or 100 mg m(-2) docetaxel every 3 weeks is feasible.

Optimally tolerated dose of lapatinib in combination with docetaxel plus trastuzumab in first-line treatment of HER2-positive metastatic breast cancer.

BACKGROUND: This phase IB, open-label, dose-escalation study evaluated the safety, tolerability, and optimally tolerated regimen (OTR) of lapatinib in combination with docetaxel and trastuzumab in patients with previously untreated stage IV metastatic breast cancer (MBC) tumors overexpressing human epidermal growth factor receptor 2 (HER2). PATIENTS AND METHODS: Evaluated dose regimens included lapatinib (500-1500 mg/day), docetaxel (triweekly; 60-100 mg/m²), and trastuzumab (weekly; 2 mg/kg fixed dose); prophylactic granulocyte colony-stimulating factor was included with regimens with ≥750 mg/day lapatinib. End points included OTR and safety/tolerability (primary), overall response rate (ORR), and pharmacokinetics (secondary). RESULTS: None of the patients (N = 53) experienced dose-limiting toxic effects (DLTs) at the highest dose level; thus, the OTR of lapatinib with 100 mg/m(2) docetaxel was not determined. Common adverse events included diarrhea, nausea, alopecia, fatigue, and rash; grade 3/4 (≥2 patients) were neutropenia, diarrhea, leukopenia, peripheral neuropathy, and rash. Seven patients had DLTs (cycle 1). In 45 patients with measurable disease confirmed by bone scan, investigator-assessed ORR was 31%; without bone scan, confirmation was 64%; 8 patients without measurable disease were evaluated as stable. Lapatinib/docetaxel plasma concentrations were positively associated with complete response. CONCLUSIONS: Lapatinib/docetaxel/trastuzumab is a feasible and well-tolerated treatment of untreated HER2-positive stage IV MBC. Two lapatinib/docetaxel OTR doses were recommended (1250 mg/75 mg/m²; 1000 mg/100 mg/m²). CLINICAL TRIAL NUMBER: NCT00251433.

Circulating tumor cells and brain metastasis outcome in patients with HER2-positive breast cancer: the LANDSCAPE trial.

BACKGROUND: Decrease of circulating tumor cells (CTC) during treatment is an independent prognostic factor in metastatic breast cancer (MBC). We specifically evaluated the impact of CTC on brain metastasis outcome. METHODS: HER2-positive MBC with brain metastasis not previously treated with whole-brain radiotherapy received first-line combination of lapatinib and capecitabine in a phase II study. CTC were detected at baseline and day 21 (CellSearch). RESULTS: Median follow-up of the 44 analyzed patients was 21.2 months. The central nervous system objective response (CNS-OR) rate was 66%. At baseline, 20 of 41 assessable patients for CTC (49%) had ≥1 CTC (range 1-301, median 3) and 9 (22%) had ≥5 CTC. At day 21, 7 of 38 patients (18%) had ≥1 CTC (P = 0.006, versus baseline), and CTC had disappeared in 11 patients. CNS-OR rate was significantly higher in patients with no CTC at day 21 [25 of 31 (80%) versus 2 of 7 (29%), P = 0.01]. The 1-year overall survival rate was 83.9% in patients with no CTC at day 21 versus 42.9% in patients with ≥1 CTC (P = 0.02). CONCLUSIONS: This is the first report showing a correlation between CNS metastasis response, outcome and early CTC clearance under targeted treatment of HER2+ MBC. CLINICAL TRIALS NUMBER: NCT00967031.

Tumour growth kinetics assessment: added value to RECIST in cancer patients treated with molecularly targeted agents.

BACKGROUND: Treatment effect is categorised into four classes by RECIST based on the evolution of the size of target lesions and the occurrence of new lesions, irrespective of tumour growth kinetics before treatment. This study aimed at evaluating the added value of tumour growth kinetics assessment to RECIST in patients treated with molecularly targeted agents (MTAs). METHODS: On-study imaging, along with pre-baseline imaging, of patients treated with MTA(s) in clinical trials at Institut Curie were centrally reviewed. The tumour growth ratio (TGr), defined as the ratio of the slope of tumour growth before treatment and the slope of tumour growth on treatment between the nadir and disease progression, was calculated for each patient. RESULTS: A total of 50 patients included in 18 trials were eligible for the study. Among the 44 patients who withdrew from the study because of disease progression according to the investigators' assessment, 18 patients (41%) had a TGr <0.9. Among these 18 patients, 5 had disease progression according to RECIST 1.1 based on our retrospective reassessment of on-study imaging and occurrence of no new lesion during study treatment. CONCLUSION: Our preliminary results suggest that a substantial proportion of patients treated with MTAs have discontinued treatment although being potentially benefitted from them.

Phase I study of lapatinib plus vinorelbine in patients with locally advanced or metastatic breast cancer overexpressing HER2.

BACKGROUND: To determine the recommended doses of lapatinib (LPT) combined with vinorelbine (VNR) in women with human epidermal growth factor receptor 2-overexpressing advanced breast cancer pretreated with trastuzumab. METHODS: In this phase I study, women were treated with oral daily LPT and i.v. VNR infused on days 1 and 8 every 3 weeks. Dose levels (DL) of LPT (mg)/VNR (mg m(-2)) ranged from 750/20 to 1250/30. The primary end point was feasibility based on maximal tolerated dose (MTD) and maximum administered dose (MAD). Pharmacokinetic interactions were investigated. RESULTS: Of 33 patients included, 29 were evaluable. Two DLT occurred at DL4 (1000/25) meeting the MAD criteria. Despite an additional intermediate DL3' (1250/22.5), MTD was reached at DL3 (1000/22.5). Grade 3-4 neutropenia was the most common toxicity (34% and 38% of patients, respectively). Other significant toxicities included grade 3-4 diarrhoea (3% each), and grade 3 asthenia (10%). Although not statistically significant, LPT (at 1000 or 1250 mg) decreased the VNR clearance by 30-40% compared with DL1. CONCLUSION: The MTD LPT 1000 mg/VNR 22.5 mg m(-2) (DL3) is recommended for additional development. Pharmacokinetic interactions might increase the exposure to VNR and consequently alter the hematological tolerance.

Combining immunotherapy with an epidrug in squamous cell carcinomas of different locations: rationale and design of the PEVO basket trial.

Squamous cell carcinomas (SCCs) are among the most frequent solid tumors in humans. SCCs, related or not to the human papillomavirus, share common molecular features. Immunotherapies, and specifically immune checkpoint inhibitors, have been shown to improve overall survival in multiple cancer types, including SCCs. However, only a minority of patients experience a durable response with immunotherapy. Epigenetic modulation plays a major role in escaping tumor immunosurveillance and confers resistance to immune checkpoint inhibitors. Preclinical evidence suggests that modulating the epigenome might improve the efficacy of immunotherapy. We herein review the preclinical and the clinical rationale for combining immunotherapy with an epidrug, and detail the design of PEVOsq, a basket clinical trial combining pembrolizumab with vorinostat, a histone deacetylase inhibitor, in patients with SCCs of different locations. Sequential blood and tumor sampling will be collected in order to identify predictive and pharmacodynamics biomarkers of efficacy of the combination. We also present how clinical and biological data will be managed with the aim to enable the development of a prospective integrative platform to allow secure and controlled access to the project data as well as further exploitations.

Efficacy of molecularly targeted agents given in the randomised trial SHIVA01 according to the ESMO Scale for Clinical Actionability of molecular Targets.

BACKGROUND: A randomised trial SHIVA01 compared the efficacy of matched molecularly targeted therapy outside their indications based on a prespecified treatment algorithm versus conventional chemotherapy in patients with metastatic solid tumours who had failed standard of care. No statistical difference was reported between the two groups in terms of progression-free survival (PFS), challenging treatment algorithm. The European Society for Medical Oncology (ESMO) Scale for Clinical Actionability of molecular Targets (ESCAT) recently defined criteria to prioritise molecular alterations (MAs) to select anticancer drugs. We aimed to retrospectively evaluate the efficacy of matched molecularly targeted agents (MTAs) given in SHIVA01 according to ESCAT tiers. PATIENTS AND METHODS: MAs used in SHIVA01 were retrospectively classified into ESCAT tiers, and PFS and overall survival (OS) were compared using log-rank tests. RESULTS: One hundred fifty-three patients were treated with matched MTAs in SHIVA01. MAs used to allocate MTAs were classified into tiers II, IIIA, IIIB and IVA according to the ESCAT. Median PFS was 2.0 months in tier II, 3.1 in tier IIIA, 1.7 in tier IIIB and 3.2 in tier IVA (p = 0.13). Median OS in tier IIIB was worse than that in tiers II, IIIA and IVA (6.3 months versus 11.7, 11.2 and 12.1, p = 0.002). CONCLUSIONS: Most MAs used to allocate therapy in SHIVA01 were shown to improve outcomes in other tumour types (tier IIIA). Worst outcome was observed in patients treated based on another type of alteration than the one reported to improve outcomes (tier IIIB), highlighting the crucial impact of the type of the alterations beyond the gene and the signalling pathway.

Efficacy and tolerance of vinorelbine and fluorouracil combination as first-line chemotherapy of advanced breast cancer: results of a phase II study using a sequential group method.

PURPOSE: To assess the antitumor efficacy and safety profile of the combination of Fluorouracil (5FU) and vinorelbine given as first-line therapy to patients with advanced breast cancer. PATIENTS AND METHODS: As defined in the seven consecutive steps of a phase II group sequential design, 63 patients received 5FU 750 mg/m2/d for 5 consecutive days as a continuous infusion and vinorelbine 30 mg/ m2 on days 1 and 5 as a short intravenous (I/V) infusion every 3 weeks. RESULTS: Forty-one of 63 patients achieved an objective response, which allowed us to discontinue the study and reject a response rate less than 50% with a statistical power of 90%. The unbiased estimate of the response rate was 61.6%. Response rate did not differ significantly according to the following: (1) type of prior adjuvant therapy (none, n = 23; without anthracycline, n = 6; with anthracyline, n = 34); (2) site of metastatic disease; and (3) number of metastatic sites. The median time to progression was 8.4 months. The median response duration was 12.3 months, and the median duration of complete response (CR), from the first assessment of CR, was 7.3 months. The median overall survival time was 23 months (28.1 months for patients with a CR). The main toxicities (grades 3 and 4) were neutropenia (90% of patients), infection (12.7%), mucositis (37%), and constipation (9.5%). Nevertheless, treatment could be given on an outpatient basis to the majority of patients, and the median relative dose-intensity was 86%. CONCLUSION: This phase II study, which used a group-sequential design, shows that the combination of 5FU and vinorelbine is an active and tolerable regimen for the treatment of first metastatic progression of breast cancer. It provides an alternative regimen for patients who have previously received anthracycline-based adjuvant chemotherapy or in whom anthracyclines cannot be used.

Human pharmacokinetics of N-L-leucyl-doxorubicin, a new anthracycline derivative, and its correlation with clinical toxicities.

A pharmacokinetic study of N-L-leucyl-doxorubicin, a new derivative of doxorubicin, has been undertaken during a phase I trial in 19 patients with advanced cancer after intravenous bolus administration at doses ranging from 30 to 240 mg/m2. The pharmacokinetics of N-L-leucyl-doxorubicin was linear with a total body clearance of 41.3 +/- 25.7 L/hr/m2. N-L-leucyl-doxorubicin was extensively metabolized into doxorubicin, which appeared in plasma immediately after N-L-leucyl-doxorubicin infusion. The mean molar doxorubicin/N-L-leucyl-doxorubicin area under the curve (AUC) ratio was 0.49 +/- 0.22 and was independent of the administered dose. A relationship has been established between the doxorubicin AUC (r = 0.74; p less than 0.001) and the surviving factor in white blood cell counts. Other toxic side effects (thrombocytopenia or stomatitis) did not correlate with any pharmacokinetic parameter. These findings suggest that the degree of metabolization of N-L-leucyl-doxorubicin into doxorubicin may be responsible for the toxicity, that is, N-L-leucyl-doxorubicin may simply represent a pro-drug for doxorubicin.

[Study of vinorelbine (V) combined with hexamethylmelamine (H) (combination V-H) in adenocarcinoma of the ovary: results a phase I-IIA trial, NHO-88, of ARTAC "ovarian" group]. / Etude de la vinorelbine (V) associée à l'hexaméthylmélamine (H) (combinaison V-H) dans les adénocarcinomes de l'ovaire: résultats d'un essai phase I-IIA, NHO-88, du groupe "ovaire" de l'ARTAC.

The lack of decisive progress in ovarian cancer chemotherapy in recent years led the ARTAC "Ovary" group to initiate a study based on the hypothesis of collateral sensitivities. In this phase I-II trial, NHO-88, the V-H combination (associating vinorelbine (VNB) and hexamethylmelamine (HMM) was studied in patients with advanced ovarian adenocarcinomas, most of which had become resistant to previous chemotherapy. The aim of the study was to find an active combination without complete cross resistance with first-line platinum salt based combinations, such as CAP, FAP or CACb-300. A pilot feasibility study was first carried out to determine the maximum tolerated weekly dose (MTWD) of VNB (20 mg/m2/week), HMM being administered per os on days 1-14 of every 28-day cycle at a standard dose of 250 mg/m2/day. An open phase II-A study was further carried out according to a 2-step sequential analysis method for phase II clinical trials. We observed: 1), a good tolerance of the V-H combination apart from frequent neutropenia; 2), a response rate of 35% (95% confidence interval: 23-47%); 3), a median response duration of 4 months (range: 1-7 months); 4), in some cases, the absence of a complete cross-resistance between the V-H regimen and the previously administered platinum-based combinations. These results, which are currently being validated (phase II-B ongoing), constitute the first step in the search for active systems of sequential or alternate chemotherapeutic regimens for the treatment of advanced carcinomas.

Clinical phase I and pharmacokinetic trial of vinorelbine administered as single intravenous bolus every 21 days in cancer patients.

We have performed a high-dose clinical and pharmacokinetic trial with vinorelbine administered as a bolus injection every 21 days. The aim was to evaluate a schedule with longer treatment intervals than one week and to determine the toxicity pattern of such a schedule. A total of 13 patients (pts) with solid tumors (non-small-cell lung [3 pts], unknown primary [3 pts], mesothelioma [2 pts], colon/rectum, sarcoma, thyroid, head/neck and cervix [1 pt each]) were entered [9 male, 4 female, median age: 56 years (range: 37-69)]. Dose levels were 35, 40 and 45 mg/m2 with a total of 26 cycles administered. At 40 mg/m2, 2/6 pts developed grade 4 granulocytopenia. 1/1 pt at 45 mg/m2 developed a grade 4 leuko- and granulocytopenia. Non-hematological toxicities were mild to moderate. Neurologic toxicity except for constipation was mild. Constipation occurred at 35 mg/m2 in 1/6 pts WHO grade 4, at 40 mg/m2 in 2/6 pts WHO grade 3 and at 45 mg/m2 in 1/1 pt WHO grade 4 and was due to neurotoxicity. No objective antitumor response was observed. Vinorelbine pharmacokinetics were analysed in whole blood and plasma and were similar to previously published studies using < or = 30 mg/m2. Our results confirm a high affinity of vinorelbine to corpuscular blood elements. We conclude that the MTD of vinorelbine administered once every 21 days as bolus injection is 40 mg/m2, the dose-limiting toxicities are constipation and granulocytopenia and the recommended dose for subsequent Phase II trials is 35 mg/m2.

An EORTC-ECSG phase II study of vinorelbine in patients with recurrent and/or metastatic squamous cell carcinoma of the head and neck.

BACKGROUND: Vinorelbine is an active drug in the treatment of lung and breast cancers and has a favorable toxicity profile. Many clinical trials have demonstrated its antitumor activity in other tumor types including squamous cell carcinoma of the head and neck (SCCHN). We investigated the efficacy and tolerability of vinorelbine in patients with recurrent and/or metastatic SCCHN, previously untreated by chemotherapy. PATIENTS AND METHODS: Seventy-one patients with locoregional recurrent and/or metastatic SCCHN were treated with vinorelbine at a dose of 30 mg/m2/week i.v. by short-duration infusion on an out-patient basis. Doses were adjusted according to tolerance. RESULTS: Two complete and seven partial responses were observed among 56 evaluable patients, yielding a response rate of 16% (95% confidence interval (CI): 8%-28%). The overall response rate of all eligible patients (63) was 14%. The responses were seen in recurrent tumors, lymph nodes and in lung metastases, and their median duration was 19 weeks (12-63). The main toxicity, severe and reversible neutropenia (grade 3-4) occurred in 53% of the 69 evaluable (for toxicity) patients. Twelve patients developed severe bronchopulmonary infections, which caused two early deaths. Constipation was observed in 31 patients (45%). Other gastrointestinal toxicities, asthenia, acute pain syndrome and peripheral sensory neuropathy, were mild to moderate. The median number of treatments was seven cycles and the median relative dose intensity of vinorelbine was 85% (25.5 mg/m2/week). CONCLUSIONS: Vinorelbine is an active drug, with acceptable toxicity, in recurrent and/or metastatic SCCHN, at the dose and schedule administered in the present study. Further evaluation in association with other agents and/or radiotherapy is warranted.