ALK Inhibitors or Chemotherapy for Third Line in ALK-positive NSCLC? Real-world Data.

OBJECTIVES: ALK inhibitors (ALKi) are the standard-of-care treatment for metastatic ALK-rearranged non-small cell lung cancer (NSCLC) in the first- and second-line setting. We conducted a real-world multi-institutional analysis, aiming to compare the efficacy of third-line ALKi versus chemotherapy in these patients. METHODS: Consecutive ALK-positive metastatic NSCLC patients treated with at least one ALKi were identified in the working databases of 7 Israeli oncology centers (the full cohort). Demographic and clinical data were collected. Patients receiving any systemic treatment beyond 2 ALKi comprised the third-line cohort, whether a third ALKi (group A) or chemotherapy (group B). Groups A and B were compared in terms of overall survival (OS) and time-to-next-treatment line (TNT). RESULTS: At a median follow-up of 41 months (95% confidence interval [CI]: 32-55), 80 (47.1%) have died. Median OS (mOS) in the full cohort (n = 170) was 52 months (95% CI: 32-65). Number of ALKi (hazard ratio [HR] 0.765; 95% CI: 0.61-0.95; P = .024) and age (HR 1.02, 95% CI: 1.01-1.04, P = .009) significantly associated with OS in the full cohort. The third-line cohort included 40 patients, of which 27 were treated with third ALKi (group A) and 13 treated with chemotherapy (group B). mOS from third-line initiation was 27 months in group A (95% CI: 13-NR) and 13 months for group B (95% CI: 3-NR); the difference was not significant (NS; P = .12). Chemotherapy as first line (HR 0.17, 95% CI: 0.05-0.52, P = .002) and a higher number of ALKi (HR 0.38, 95% CI: 0.20-0.86, P = .011) associated significantly with longer OS of the third-line cohort. TNT was 10 months for group A (95% CI: 5-19) and 3 months for group B (95% CI: 0-NR); the difference was NS (P = .079). CONCLUSION: We report mature real-world data of more than 4-year mOS in ALK-positive patients. The number of ALKi given was associated with a better outcome. OS and TNT demonstrated a statistically nonsignificant trend for a better outcome in patients receiving a third-line ALKi.

[THE CURRENT APPROACH TO METASTATIC RENAL CELL CARCINOMA].

Renal cell carcinona is the most common kidney tumor. In Israel more than 600 cases are diagnosed annually. Risk factors for renal cell carcinoma include obesity, smoking, hypertension, and diabetes; 20-30% of the patients are diagnosed with metastatic disease, and 70-80% of patients are diagnosed with an early non-metastatic tumor. The treatment of an early non-metastatic tumor is resection. At present, the role of adjuvant systemic therapy has not been established; 20-40% of the patients operated on for an early tumor will suffer from metastatic disease recurrence. The lungs are the most common site of metastases. Renal cell carcinoma is relatively refractory to chemotherapy and radiation. In the last decade, an improved understanding of the biology of the tumor, led to the development of biologic therapies targeting specific molecular mechanisms involved in the process of the disease, and a significant expansion of treatment horizon in these patients. The biologic therapies for metastatic renal cell carcinoma belong to two main groups: angiogenesis inhibitors (VEGF-R inhibitors like sunitinib, sorafenib, pazopanib and axitinib), and inhibitors of the mTOR protein (everolimus and temsirolimus). These biologic therapies led to a significant improvement in the patients' survival. Nonetheless, these therapies are associated with a unique profile of side effects like hypertension, mucositis, and hand-foot syndrome with VEGF-R inhibitors therapy, and non-infectious pneumonitis with mTOR inhibitors therapy. The present review will focus on the modern approach to metastatic renal cell carcinoma.

Active smoking may negatively affect response rate, progression-free survival, and overall survival of patients with metastatic renal cell carcinoma treated with sunitinib.

BACKGROUND: Obesity, smoking, hypertension, and diabetes are risk factors for renal cell carcinoma development. Their presence has been associated with a worse outcome in various cancers. We sought to determine their association with outcome of sunitinib treatment in metastatic renal cell carcinoma (mRCC). METHODS: An international multicenter retrospective study of sunitinib-treated mRCC patients was performed. Multivariate analyses were performed to determine the association between outcome and the pretreatment status of smoking, body mass index, hypertension, diabetes, and other known prognostic factors. RESULTS: Between 2004 and 2013, 278 mRCC patients were treated with sunitinib: 59 were active smokers, 67 were obese, 73 were diabetic, and 165 had pretreatment hypertension. Median progression-free survival (PFS) was 9 months, and overall survival (OS) was 22 months. Factors associated with PFS were smoking status (past and active smokers: hazard ratio [HR]: 1.17, p = .39; never smokers: HR: 2.94, p < .0001), non-clear cell histology (HR: 1.62, p = .011), pretreatment neutrophil-to-lymphocyte ratio >3 (HR: 3.51, p < .0001), use of angiotensin system inhibitors (HR: 0.63, p = .01), sunitinib dose reduction or treatment interruption (HR: 0.72, p = .045), and Heng risk (good and intermediate risk: HR: 1.07, p = .77; poor risk: HR: 1.87, p = .046). Factors associated with OS were smoking status (past and active smokers: HR: 1.25, p = .29; never smokers: HR: 2.7, p < .0001), pretreatment neutrophil-to-lymphocyte ratio >3 (HR: 2.95, p < .0001), and sunitinib-induced hypertension (HR: 0.57, p = .002). CONCLUSION: Active smoking may negatively affect the PFS and OS of sunitinib-treated mRCC. Clinicians should consider advising patients to quit smoking at initiation of sunitinib treatment for mRCC.

Are bisphosphonates an indispensable tool in the era of targeted therapy for renal cell carcinoma and bone metastases?

One third of patients with metastatic renal cell carcinoma (RCC) suffer from bone metastases. Skeletal involvement in RCC is associated with the occurrence of skeletal-related events, and may negatively impact on the outcome of patients treated with systemic therapies. In patients with RCC and bone metastases, therapies that inhibit osteoclasts, as bisphosphonates and denosumab, are used as adjunct to systemic targeted therapies to prevent skeletal-related events. Data suggest that they may also improve the outcome of systemic targeted therapies. Herein we review the preclinical and clinical data on their use, as well as remaining open questions.

Experience with sunitinib treatment for metastatic renal cell carcinoma in a large cohort of Israeli patients: outcome and associated factors.

BACKGROUND: The VEGFR/PDGFR inhibitor sunitinib was approved in Israel in 2008 for the treatment of metastatic renal cell carcinoma (mRCC), based on an international trial. However, the efficacy of sunitinib treatment in Israeli mRCC patients has not been previously reported. OBJECTIVES: To report the outcome and associated factors of sunitinib treatment in a large cohort of Israeli mRCC patients. METHODS: We conducted a retrospective study of an unselected cohort of mRCC patients who were treated with sunitinib during the period 2006-2013 in six Israeli hospitals. Univariate and multivariate analyses were performed to determine the association between treatment outcome and clinicopathologic factors. RESULTS: We identified 145 patients; the median age was 65 years, 63% were male, 80% had a nephrectomy, and 28% had prior systemic treatment. Seventy-nine percent (n = 115) had clinical benefit (complete response 5%, n = 7; partial response 33%, n = 48; stable disease 41%, n = 60); 21% (n = 30) were refractory to treatment. Median progression-free survival (PFS) was 12 months and median overall survival 21 months. Factors associated with clinical benefit were sunitinib-induced hypertension: [odds ratio (OR) 3.6, P = 0.042] and sunitinib dose reduction or treatment interruption (OR 2.4, P = 0.049). Factors associated with PFS were female gender [hazard ratio (HR) 2, P = 0.0041, pre-sunitinib treatment neutrophil-to-lymphocyte ratio < or = 3 (HR 2.19, P = 0.002), and active smoking (HR 0.19, P < 0.0001). Factors associated with overall survival were active smoking (HR 0.25, P < 0.0001) and sunitinib-induced hypertension (HR 0.48, P = 0.005). To minimize toxicity, the dose was reduced or the treatment interrupted in 39% (n = 57). CONCLUSIONS: The efficacy of sunitinib treatment for mRCC among Israeli patients is similar to that in international data.

Pretreatment neutrophil-to-lymphocyte ratio in metastatic castration-resistant prostate cancer patients treated with ketoconazole: association with outcome and predictive nomogram.

BACKGROUND: The neutrophil-to-lymphocyte ratio (NLR), an inflammation marker, is prognostic in several cancers. We assessed the association between the pretreatment NLR and outcome of patients with metastatic castration-resistant prostate cancer (mCRPC) treated with the CYP17 inhibitor ketoconazole. METHODS: This was an international, retrospective study of 156 mCRPC patients treated with ketoconazole. The independent effect of the pretreatment NLR and factors associated with treatment outcome were determined by multivariate analysis. RESULTS: Seventy-eight patients (50%) had a ≥50% decline in prostate-specific antigen (PSA). The median progression-free survival (PFS) time was 8 months. Excluded from the analysis were 23 patients without available data on their NLR and those with a recent health event or treatment associated with a blood count change. Sixty-two patients (47%) had a pretreatment NLR >3. Risk factors associated with the PFS outcome were a pretreatment NLR >3 and PSA doubling time (PSADT) <3 months and a prior response to a gonadotropin-releasing hormone agonist of <24 months or to an antiandrogen of <6 months. The number of risk factors was used to form a predictive nomogram by patient categorization into favorable (zero or one factor), intermediate (two factors), and poor (three or four factors) risk groups. CONCLUSIONS: In mCRPC patients treated with ketoconazole, the pretreatment NLR and PSADT, and prior response to androgen-deprivation therapy, may be associated with the PFS time and used to form a risk stratification predictive nomogram.

[Metastatic hormone refractory prostate cancer: new treatment horizon].

Prostate cancer is the second leading cause of cancer death in men in the western world. Most deaths will occur due to the progression of cancer into a hormone refractory state. Until recently, docetaxel-based chemotherapy was the only established treatment (shown to increase survival) for patients with metastatic hormone refractory prostate cancer. The improved understanding of prostate cancer biology in recent years led to the development of drugs directed against precise tumorigenesis-associated molecular pathways, and significant expansion of treatment horizons for these patients. In 2010-2011, three more agents, with different mechanisms of action, were shown to be associated with a survival benefit in mHRPC, including the dendritic cell vaccine sipuleucel-T (immunotherapy), the 17,20 lyase inhibitor abiraterone (hormonal therapy), and the taxane cabazitaxel (chemotherapy). A fourth agent, denosumab (bone targeted therapy) was also recently approved by the FDA for patients with bone metastasis after showing a reduction in the occurrence of skeletal-related events. This review will focus on recent advances in the standard treatments paradigm in mHRPC.

Expression and significance of EGFR in malignant peripheral nerve sheath tumor.

Malignant peripheral nerve sheath tumor (MPNST) is an aggressive sarcoma. Epidermal growth factor receptor (EGFR) may play a putative role in its pathogenesis, and be targeted for therapeutic purposes. The study was aimed at investigating the expression and prognostic influence of EGFR in MPNST. Primary and metastatic MPNSTs were immunostained with antibodies to EGFR. The total EGFR expression (membranous and cytoplasmic) was analyzed by morphometry, grade of positivity and the intensity (score 0-3). An EGFR composite score (range 0-300) was calculated by multiplying the intensity by the grade. A composite score >10 was considered as EGFR overexpression. Score was correlated with clinical behavior. Forty-three percentage of 46 patients with MPNST overexpressed EGFR in the primary tumor, and had a higher prevalence of advanced-stage tumors (>or=IIc, 46% vs. 80%, P = 0.011). Patients without overexpression had a higher prevalence of tumors with a low mitotic rate (31% vs. 0%, P = 0.049). Neurofibromatosis was more prevalent in patients with EGFR overexpression (75% vs. 42%, P = 0.007). Five year disease free survival (mean 30.1 vs. 17.4 months, P = 0.048), time to progression (mean 9.2 vs. 5.2 months, P = 0.005) and 5 year survival (52% vs. 25%, P = 0.041, mean 54 vs. 43 months) were significantly higher among patients without overexpression. EGFR appeared to play a role in MPNST progression. EGFR overexpression was correlated with worse prognostic variables and course. Clinical trials of targeting EGFR in MPNST are warranted.

Neoadjuvant treatment with paclitaxel and epirubicin in invasive breast cancer: a phase II study.

BACKGROUND AND OBJECTIVES: The modern management of locally advanced breast cancer includes a multimodal approach consisting of neoadjuvant chemotherapy (usually given as initial treatment), surgery, radiotherapy and adjuvant hormone therapy. This therapeutic approach converts many patients with initially unresectable disease to reasonable surgical candidates, with acceptable rates of loco-regional disease control. Induction of a pathological complete response (pCR) with modern chemotherapy agents or combined with immunotherapy, when applicable, should be one of the primary goals of neoadjuvant therapy in order to achieve better disease-free and overall survival in this subset of patients. Neoadjuvant chemotherapy is now standard for patients with locally advanced breast cancer, and this method of treatment has been extended to patients with earlier disease without affecting the treatment outcome. The objectives of this study were: (1) to conduct a phase II study to assess the efficacy and availability of epirubicin and paclitaxel in the neoadjuvant setting in women with locally advanced or high tumour-to-breast ratio breast cancer (no patient in either of these subgroups was a candidate for breast-conserving surgery prior to chemotherapy); (2) to evaluate the incidence of clinically relevant toxicity and, in particular, cardiac toxicity after treatment with an epirubicin + paclitaxel regimen in this group of patients. METHODS: In this open-label, phase II, single-centre trial carried out in a university-affiliated tertiary-care municipal hospital, the rate of objective response, evaluated by clinical and pathological examinations, was the primary endpoint of the study. Other endpoints were the rates of breast-conserving surgery, local recurrence, disease-free survival and overall survival. Sixty patients were enrolled from September 1998 to September 2003 with a median follow-up of 56 months (range 16-96). All 60 women met the criteria for inclusion and agreed to participate in the study. They were diagnosed as having locally advanced or high tumour-to-breast ratio breast cancer that did not initially permit breast-conserving surgery. Epirubicin 75 mg/m(2) and paclitaxel 175 or 200 mg/m(2) were administered for five courses. Rates of adverse events were also analysed. RESULTS: Eight patients experienced a pCR, five had a pathological partial response with an almost complete pathological response, and 39 were able to undergo breast-conserving surgery. Adverse effects were mostly of grade 1 or 2 severity. The most common adverse reactions were fatigue and neutropenic fever. One patient developed local recurrence during the median 56-month follow-up. Among examined biological markers, only estrogen receptor negativity was a strong predictor of a pCR. The rates of disease-free and overall survival following the neoadjuvant combination were similar for those who had tumours positive for the estrogen receptor and those who were negative for this. CONCLUSION: Treatment with a combination of epirubicin and paclitaxel enabled lumpectomy in a substantial proportion of women who were previously deemed to not be suitable candidates for breast-conserving surgery. Clinical responses were not influenced by the initial tumour volume, and the only statistically significant predictor of pCR was the estrogen receptor status of the tumour.

Metformin Use and Outcome of Sunitinib Treatment in Patients With Diabetes and Metastatic Renal Cell Carcinoma.

BACKGROUND: Although studies in several cancer types suggest that metformin has antitumor activity, its effect on the outcome of targeted therapies in metastatic renal cell carcinoma (mRCC) is poorly defined. We aimed to analyze the effect of metformin use on the outcome of sunitinib treatment in diabetic patients with mRCC. PATIENTS AND METHODS: We performed a retrospective study of diabetic patients with mRCC, who were treated with sunitinib in 8 centers across 2 countries. Patients were divided into metformin users and nonusers. The effect of metformin use on response rate, progression-free survival (PFS), and overall survival (OS), was tested. Furthermore, univariate and multivariate analyses of the association between clinicopathologic factors and metformin use, and outcome were performed using the entire patient cohort. RESULTS: Between 2004 and 2014, 108 diabetic patients with mRCC were treated with sunitinib. There were 52 metformin users (group 1) and 56 nonusers (group 2). The groups were balanced regarding clinicopathologic factors. Clinical benefit (partial response + stable disease) in group 1 versus 2 was 96% versus 84% (P = .054). Median PFS was 15 versus 11.5 months (P = .1). Median OS was 32 versus 21 months (P = .001). In multivariate analyses of the entire patient cohort (n = 108), factors associated with PFS were active smoking and pretreatment neutrophil to lymphocyte ratio > 3. Factors associated with OS were metformin use (hazard ratio, 0.21; P < .0001), Heng risk, active smoking, liver metastases, and pretreatment neutrophil to lymphocyte ratio > 3. CONCLUSION: Metformin might improve the OS of diabetic patients with mRCC who are treated with sunitinib.

Is there a "Trial Effect" on Outcome of Patients with Metastatic Renal Cell Carcinoma Treated with Sunitinib?

PURPOSE: Studies suggested the existence of a 'trial effect', in which for a given treatment, participation in a clinical trial is associated with a better outcome. Sunitinib is a standard treatment for metastatic renal cell carcinoma (mRCC). We aimed to study the effect of clinical trial participation on the outcome of mRCC patients treated with sunitinib, which at present, is poorly defined. MATERIALS AND METHODS: The records of mRCC patients treated with sunitinib between 2004-2013 in 7 centers across 2 countries were reviewed. We compared the response rate (RR), progression free survival (PFS), and overall survival (OS), between clinical trial participants (n=49) and a matched cohort of non-participants (n=49) who received standard therapy. Each clinical trial participant was individually matched with a non-participant by clinicopathologic factors. PFS and OS were determined by Cox regression. RESULTS: The groups were matched by age (median 64), gender (male 67%), Heng risk (favorable 25%, intermediate 59%, poor 16%), prior nephrectomy (92%), RCC histology (clear cell 86%), pre-treatment NLR (>3 in 55%, n=27), sunitinib induced hypertension (45%), and sunitinib dose reduction/treatment interruption (41%). In clinical trial participants versus non-participants, RR was partial response/stable disease 80% (n=39) versus 74% (n=36), and progressive disease 20% (n=10) versus 26% (n=13) (p=0.63, OR 1.2). The median PFS was 10 versus 11 months (HR=0.96, p=0.84), and the median OS 23 versus 24 months (HR=0.97, p=0.89). CONCLUSIONS: In mRCC patients treated with sunitinib, the outcome of clinical trial participants was similar to that of non-participants who received standard therapy.

Metastatic hormone refractory prostate cancer: recent advances in standard treatment paradigm, and future directions.

Until recently, docetaxel-based chemotherapy was the only established treatment for patients with metastatic hormone refractory prostate cancer (mHRPC). In 2010 to 2011, 3 more agents were shown to be associated with a survival benefit in mHRPC, including the dendritic cell vaccine sipuleucel-T, the 17,20 lyase inhibitor abiraterone, and the taxane cabazitaxel. The improved understanding of prostate cancer biology in recent years led to the development of drugs directed against precise tumorigenesis-associated molecular pathways. Molecular pathways involved in the progression of mHRPC include the androgen receptor, angiogenesis, endothelin receptor, tyrosine kinases (SRC, MET, vascular endothelial growth factor receptor, RET), and the receptor activator of nuclear factor-kB-ligand. This review will focus on recent advances in the standard treatments paradigm, and promising new targeted agents that are being investigated, in mHRPC.

Bisphosphonates combined with sunitinib may improve the response rate, progression free survival and overall survival of patients with bone metastases from renal cell carcinoma.

BACKGROUND: Bisphosphonates are used to prevent skeletal events of bone metastases, and may exhibit antitumour effects. We aimed to evaluate whether bisphosphonates can bring a response rate (RR), progression free survival (PFS) and overall survival (OS) benefit to patients with bone metastasis from renal cell carcinoma (RCC) that is treated with sunitinib. METHODS: We performed a multicentre retrospective study of patients with bone metastases from RCC that was treated with sunitinib. The effect of bisphosphonates on RR, PFS and OS was tested with adjustment for known prognostic factors using a chi-square test from contingency table and partial likelihood test from Cox regression model. RESULTS: Between 2004 and 2011, 209 patients with metastatic RCC were treated with sunitinib, 76 had bone metastases, 35 bisphosphonates users and 41 non-users. The groups of bisphosphonates users and non-users were balanced regarding known prognostic factors. Objective response was partial response/stable disease 86% (n = 30) versus 71% (n = 29), and progressive disease 14% (n = 5) versus 29% (n = 12) (p = 0.125, OR 2.48) in users versus non-users, respectively. Median PFS was 15 versus 5 months (HR = 0.55, p<0.0001), and median OS was not reached (with a median follow-up time of 45 months) versus 14 months (HR = 0.4, p = 0.029), in favour of users. In multivariate analysis of the entire patient cohort (n = 76), factors associated with PFS were bisphosphonates use (HR = 0.58, p = 0.035), and pre-treatment neutrophil to lymphocyte ratio >3 (HR = 3.5, p = 0.009). Factors associated with OS were bisphosphonates use (HR = 0.5, p = 0.008), elevated pre-treatment alkaline phosphatase (HR = 2.9, p = 0.003) and sunitinib induced HTN (HR = 0.63, p<0.0001). CONCLUSIONS: Bisphosphonates may improve the RR, PFS and OS of sunitinib treatment in RCC with bone metastases.

An animal model for chemotherapy-associated steatohepatitis and its prevention by the oral administration of fatty acid bile acid conjugate.

BACKGROUND: Preoperative chemotherapy for hepatic resection of colorectal liver metastases is associated with the development of chemotherapy-associated steatohepatitis (CASH). This increases the risk of perioperative morbidity and mortality. To the authors' knowledge, an animal model for CASH has not been described previously. It has been established that fatty acid bile acid conjugates (FABACs) prevent the formation of diet-induced fatty liver. The current study was designed to establish an animal model of CASH and to use that model to study the effect of FABACs on its occurrence. METHODS: C57BL/6 mice were given different doses of oxaliplatin and irinotecan. Oxaliplatin administered once weekly at a dose of 6 mg/kg for a total dose of 24 mg/kg was tolerated best and was associated most consistently with CASH. Thus, that dose was chosen as the induction model for CASH. Subsequently, mice were divided into a control group (no treatment), an oxaliplatin group, and a CASH-prevention group, which received oxaliplatin and C20-FABAC at a dose of 150 mg/kg daily. The animals were killed after 28 days. RESULTS: Liver fat content was significantly lower (P < .0001) in the control group (51.63 mg/g) and the prevention group (62.13 mg/g) compared with the oxaliplatin group (95.35 mg/g). This difference was mainly because of the accumulation of liver triglycerides in the oxaliplatin group. CONCLUSIONS: The current results indicated that C57BL/6 mice receiving weekly oxaliplatin can be used as a model for CASH. Oral FABAC therapy reduced the development of CASH in animals that received oxaliplatin. To the authors' knowledge, this report is the first description of a model and a potential preventive treatment for CASH.