Treatment of patients with newly diagnosed metastatic hormone sensitive prostate cancer (mHSPC) in Belgium: a real world data analysis.

INTRODUCTION: Abiraterone acetate + prednisone (AAP) and docetaxel have proven their efficacy in the treatment of patients with newly diagnosed metastatic hormone-sensitive prostate cancer (mHSPC) in clinical trials. However, real-world data are scarce. The goal of this study is to evaluate real-world data on the efficacy and safety of these therapies in mHSPC patients. PATIENTS AND METHODS: Records of 93 patients from 21 different centres were retrospectively reviewed. Primary and secondary endpoints were radiographic and PSA progression-free survival (RPFS - PSA-PFS) and cancer specific and overall survival (CSS - OS), respectively. Adverse events (AEs) were evaluated according to the Common Terminology Criteria for Adverse Events version 5.0. Differences in oncological outcome and AEs were evaluated between three treatment groups: ADT only (N=26) - ADT + AAP (N=48) - ADT + docetaxel (N=19). Survival analysis was performed using Kaplan-Meier statistics. RESULTS: Median RPFS was 13 months (95% confidence interval [CI]: 9-17) for ADT only, 21 months (95% CI: 19-23) for ADT + AAP and 12 months (95% CI: 11-14) for ADT + docetaxel (p = 0.004). The 1-year PSA-PFS, CSS and OS were 73.5%, 90.7% and 88.7%, respectively, with no significant differences between the three groups. Adverse events of grade 3 or higher were not observed more frequently. CONCLUSION: Retrospective real-world data show a significantly longer RPFS for mHSPC patients treated with ADT + AAP compared to ADT only or ADT + docetaxel at short-term follow-up. This can aid in counselling of mHSPC patients in daily clinical practice.

Neoadjuvant capecitabine and docetaxel (plus trastuzumab): an effective non-anthracycline-based chemotherapy regimen for patients with locally advanced breast cancer.

BACKGROUND: To evaluate capecitabine-docetaxel (XT), with trastuzumab (H) in human epidermal growth factor receptor 2 (HER2)-positive disease, in inoperable locally advanced breast cancer (LABC). PATIENTS AND METHODS: Patients received up to six neoadjuvant 21-day cycles of capecitabine 900 mg/m(2) twice daily, days 1-14, plus docetaxel 36 mg/m(2), days 1 and 8. Patients with HER2-positive disease also received trastuzumab 6 mg/kg every 3 weeks. The primary end point was pathologic complete response (pCR) rate, evaluated separately in HER2-negative and HER2-positive cohorts. Secondary end points included clinical response rates and tolerability. RESULTS: The pCR rate was 15% [95% confidence interval (CI) 7-28] in 53 patients receiving XT and 40% (95% CI 26-55) in 50 patients receiving HXT. After neoadjuvant therapy, 50 patients receiving XT and 45 receiving HXT underwent surgery. No unexpected toxicity was observed: the most common grade ≥3 adverse events were diarrhea/mucositis (30% and 20%, respectively) and grade 3 hand-foot syndrome (11% and 6%, respectively). Disease-free survival and overall survival were similar with XT and HXT after median follow-up of 22 months in the XT cohort and 21 months in the HXT cohort. CONCLUSION: Neoadjuvant XT (HXT in HER2-positive disease) is highly effective in inoperable LABC, demonstrating pCR rates of 15% and 40%, respectively. This non-anthracycline-containing regimen offers obvious benefits in early disease, where avoidance of long-term cardiotoxicity is particularly important.

Cancer and renal insufficiency results of the BIRMA study.

BACKGROUND: half of anticancer drugs are predominantly excreted in urine. Dosage adjustment in renal insufficiency (RI) is, therefore, a crucial issue. Moreover, patients with abnormal renal function are at high risk for drug-induced nephrotoxicity. The Belgian Renal Insufficiency and Anticancer Medications (BIRMA) study investigated the prevalence of RI in cancer patients, and the profile/dosing of anticancer drugs prescribed. METHODS: primary end point: to estimate the prevalence of abnormal glomerular filtration rate (GFR; estimated with the abbreviated Modification of Diet in Renal Disease formula) and RI in cancer patient. Secondary end point: to describe the profile of anticancer drugs prescribed (dose reduction/nephrotoxicity). Data were collected for patients presenting at one of the seven Belgian BIRMA centres in March 2006. RESULTS: a total of 1218 patients were included. The prevalence of elevated SCR (> or =1.2 mg per 100 ml) was 14.9%, but 64.0% had a GFR<90 ml min(-1) per 1.73 m(2). In all, 78.6% of treated patients (n=1087) were receiving at least one drug needing dosage adjustment and 78.1% received at least one nephrotoxic drug. In all, 56.5% of RI patients receiving chemotherapy requiring dose reduction in case of RI did not receive dose adjustment. CONCLUSIONS: the RI is highly frequent in cancer patients. In all, 80% of the patients receive potentially nephrotoxic drugs and/or for which dosage must be adjusted in RI. Oncologists should check the appropriate dose of chemotherapeutic drugs in relation to renal function before prescribing.

Multicenter phase II randomized trial evaluating antiangiogenic therapy with sunitinib as consolidation after objective response to taxane chemotherapy in women with HER2-negative metastatic breast cancer.

The aim of this study is to test the hypothesis that antiangiogenic treatment with sunitinib consolidation can prolong remissions induced by taxane-based chemotherapy in women with metastatic breast cancer. The method involves a two-arm open-label (2:1 randomization) multicenter, randomized phase II trial evaluating the efficacy of sunitinib (arm A) versus no therapy (arm B) in patients with HER-2-negative metastatic breast cancer who achieved an objective response to taxane-based chemotherapy. The results of this study indicates that the primary endpoint of progression-free survival (PFS) > or =5 months was achieved in 10 of 36 patients (28%) in arm A and 4 of 19 patients (21%) in arm B. The median PFS was 2.8 and 3.1 months, respectively. A protocol amendment to the sunitinib dosing schedule was made because 53% (17/32) of patients treated at a starting dose of 50 mg (4 weeks on/2 weeks off) required dose reduction. Changing the starting dose to sunitinib 37.5 mg continuously resulted in dose reductions in 44% (7/16) of patients. Grades III-IV toxicity occurred in 69% of patients in arm A (fatigue 31%, musculoskeletal pain 11%, neutropenia and thrombopenia 8%) and 11% in arm B. The proof-of-principle study does not confirm the hypothesis that sunitinib consolidation therapy can lead to a predefined clinically relevant proportion of patients with PFS of > or =5 months after an objective response to taxanes. Furthermore, toxicity was significant.

Coexistence of light chain disease and chronic lymphocytic leukaemia, a complex karyotype with a rapid fatal outcome.

We report on a 48-year-old man with concomitantly diagnosed kappa expressing chronic lymphocytic leukaemia (CLL) and lambda light chain disease with highly complex chromosomal aberrations. The clinical course of the disease was very aggressive with survival of only 1 month. We demonstrate the distinct clonal origin by cytogenetic data and immunoglobulin rearrangement studies. To our knowledge this is the first report of a light chain disease associated with CLL.

Real-time quantitative RT-PCR and detection of tumour cell dissemination in breast cancer patients: plasmid versus cell line dilutions.

BACKGROUND: We previously developed a real-time quantitative RT-PCR technique to detect breast carcinoma cells in peripheral blood (PB). The aim of the current study was to improve cytokeratin 19 (CK19) quantification using plasmid dilutions of cloned PCR fragments to obtain a more reliable and reproducible quantification of CK19 transcripts. MATERIALS AND METHODS: PB samples of 14 stage IV breast cancer patients and 23 healthy controls were examined with RT-PCR using plasmid quantification. RESULTS: Median CK19+ copy numbers of one and 11 were detected in the control group and stage IV breast cancer patients, respectively (Mann-Whitney, P

Phase I and pharmacokinetic study of continuous twice weekly intravenous administration of Cilengitide (EMD 121974), a novel inhibitor of the integrins alphavbeta3 and alphavbeta5 in patients with advanced solid tumours.

A single-agent dose escalating phase I and pharmacokinetic study with Cilengitide, an inhibitor of the integrins alphavbeta3 and alphavbeta5, was performed to determine its safety and toxicity. Cilengitide was administered as a one-hour infusion twice weekly without interruption to patients with histologically- or cytologically-confirmed metastatic solid tumours. Plasma pharmacokinetics were determined at days 1 and 15. 37 patients were enrolled into the study. Dose levels studied were 30, 60, 120, 180, 240, 400, 600, 850, 1200, and 1600 mg/m(2)/infusion. There was no dose-limiting toxicity (DLT). Pharmacokinetics were dose-independent and time-invariant. Apparent terminal half-life ranged from 3 to 5 h. At 120 mg/m(2)/infusion, peak plasma concentrations were attained that optimally inhibited tumour growth in preclinical models. Cilengitide can be safely administered using a continuous twice-weekly infusion regimen. As DLT was not reached, future trials should explore Cilengitide at different doses.

PNU-145156E, a novel angiogenesis inhibitor, in patients with solid tumors: a phase I and pharmacokinetic study.

Our aim was to establish, in patients with solid tumors, the dose-limiting toxicity, maximum tolerated dose (MTD), and pharmacology of PNU-145156E, a new sulfonated distamycin A derivative that blocked circulating angiogenesis-promoting growth factors in animal studies and exhibited an antitumor effect in murine solid tumors. In a Phase I study, PNU-145156E was administered i.v. every 6 weeks. Included were patients with solid tumors; an Eastern Cooperative Oncology Group performance score

A real-time quantitative reverse transcriptase polymerase chain reaction (RT-PCR) to detect breast carcinoma cells in peripheral blood.

BACKGROUND: The detection of occult carcinoma cells in patients with breast cancer has been shown to predict disease recurrence and metastasis. MATERIALS AND METHODS: To improve on molecular detection of breast carcinoma cells in blood, we have developed a sensitive and quantitative assay using real-time quantitative RT-PCR identifying transcripts of the cytokeratin-19 (CK19) gene. RESULTS: This real-time quantitative RT-PCR is sensitive, accurate and has a high reproducibility within a wide dynamic range, which permits simultaneous quantitative analysis of samples with varying input concentrations. Furthermore, the procedure offers several technical advantages over classic quantitative PCR methods (competitive RT-PCR, Northern blotting) such as decreased likelihood of contamination due to absence of post-PCR manipulations, high sample throughput because of absence of post-PCR processing time (no agarose gel electrophoresis). In this pilot study, we detected significantly elevated CK19 transcript levels in < 10% of the volunteers, in +/- 30% of stage I-IIIa patients preoperatively and in > 70% of the and stage IV breast cancer patients. CONCLUSIONS: Analyses using this real time quantitative RT-PCR for CK19 mRNA may prove to have clinical implications in the assessment of circulating tumour cells in peripheral blood, micrometastases in bone marrow or lymph nodes in breast cancer patients. Application of this technique in a clinical population may improve diagnosis and monitoring of metastatic breast cancer and its validation is currently ongoing.

Vascular targeting of solid tumours: a major 'inverse' volume-response relationship following combretastatin A-4 phosphate treatment of rat rhabdomyosarcomas.

Tumour-specific vascularisation may be therapeutically approached in two different ways: by antiangiogenic treatments specifically directed to dividing and migrating endothelial cells, or by agents that target principally the inadequate and ill-structured tumour vasculature. Combretastatin A-4 phosphate (combreAp), a recently synthesised prodrug (OXiGENE, Lund, Sweden), is a vascular targeting agent of the latter kind. We evaluated the effect of a single intraperitoneal (i.p.) combreAp injection on the growth of rhabdomyosarcomas syngeneic in WAG/Rij rats. Different tumour volume groups, ranging between 0.1 and 27 cm(3), were selected to assess the relationship between the size at treatment time and the response to combreAp. A double combreAp treatment (2x25 mg/kg) was investigated within the same overall aim: the relationship between growth delay and tumour size. Our results show that the systemic administration of combreAp induces a clear-cut differential growth delay in the solid rat rhabdomyosarcomas: with very large tumours (>/= 14 cm(3)), a 17.6-fold stronger effect was measured than with very small tumours (<1 cm(3)). This is the 'inverse' of the volume-response seen with the conventional therapeutic approaches (radiotherapy, chemotherapy or surgery). These combreAp antitumour responses were observed without treatment limiting systemic toxicity in the rats. With clinical digital subtraction angiography, using microsurgical cannulation of a major tumour draining vessel, and with histopathology, we demonstrate that growth delay is related to an early (within 3-6 h) and extensive breakdown of tumour blood vessels. The experiments involving a second injection also indicate a volume-dependent effect of combreAp in reducing the regrowth rate of small or large rhabdomyosarcomas. This significant differential volume-response obtained with 'selective' vascular targeting, stronger in larger tumours than smaller ones, suggests the potential of broadening the therapeutic window.

Vascular endothelial growth factor measured in platelet poor plasma allows optimal separation between cancer patients and volunteers: a key to study an angiogenic marker in vivo?

BACKGROUND: Serum VEGF levels are elevated in cancer patients and are used as a tumor marker in different malignancies. We have measured VEGF levels in different blood compartments in cancer patients and healthy volunteers in order to assess the most suitable way of processing blood for measuring VEGF as a marker of tumor-angiogenesis. PATIENTS AND METHODS: VEGF concentrations were analyzed by an enzyme-linked immunosorbent assay in serum (VEGFS), EDTA plasma (VEGFEDTA), citrated plasma (VEGFC), CTAD-plasma (VEGFCTAD), platelet poor plasma (VEGFPPP), platelet rich plasma after induction of platelet activation (VEGFPRP). Platelet activation was assessed by measuring PF4 concentrations in different plasma samples. RESULTS: We observed higher VEGFS (P = 0.0027), VEGFEDTA (P = 0.003) and VEGFPPP (P = 0.0007) levels in cancer patients than in volunteers; VEGFPRP concentrations showed no significant difference (P = 0.208). Analysis of the correlation between VEGFplt and VEGFS in cancer patients showed a similar correlation in a comparable VEGFS concentration range as in the volunteers. When comparing VEGFC to VEGFCTAD, we find significantly higher VEGF and PF4 levels in citrated plasma (VEGF: P = 0.00019; PF4: P = 0.00023). CONCLUSIONS: It is likely that VEGFS in cancer patients encompass platelet-delivered VEGF and VEGF from other sources, notably from (neo)-angiogenesis in tumoral tissue. The best discrimination between volunteers and cancer patients was observed in PPP. As generating plasma can induce platelet activation, with consequent VEGF release from platelets, we suggest that to assess free circulating VEGF, CTAD plasma should be used.

Neoadjuvant/primary chemotherapy in cancer treatment: what advantage?

Neoadjuvant chemotherapy refers to the initial systemic treatment for patients who present with localised cancer for whom there is an alternative but less than completely effective local treatment. There are a multiple reasons for the use of neoadjuvant chemotherapy, but, there may be potential disadvantages. Several neoplasms in which neoadjuvant chemotherapy, if effective, can allow less mutilating surgery and neoplasms in which clinical trials indicate an expanding role for neo-adjuvant therapy are discussed.

Angiogenesis: possibilities for therapeutic interventions.

Vascular proliferation normally occurs only during embryonic development, the female reproductive cycle and wound healing. Various pathological conditions such as diabetic retinopathy are characterized by persistent, uncontrolled angiogenesis. At the other hand, impaired development of new blood vessels has been found to be related with myocardial infarction. A series of anti-angiogenic drugs are currently included in experimental cancer treatment, whereas the failure of ulcers to heal may be limited by increased angiogenesis upon administration of growth factors. In the present review control mechanisms of the vasculature are summarized and therapeutic approaches discussed.