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 23,468 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Sunitinib, a small molecule, is a multitargeted receptor kinase inhibitor which targets the vascular endothelial growth factor receptor and platelet-derived growth factor receptor as well as several others. Initially approved for the treatment of renal cell carcinoma as well as imatinib-resistant gastrointestinal stromal tumors, the activity of sunitinib has been explored in several other solid tumors including non-small cell lung cancer (NSCLC). An initial phase II trial in 63 previously treated NSCLC patients using a dose of 50 mg daily 4 of 6 weeks showed a response rate of 11.1% and a stable disease rate of 26.8%. The median time to disease progression and overall survival was 12.0 and 23.4 weeks, respectively. The principal toxicities included fatigue, pain, myalgias, nausea/vomiting, and hypertension. Three hemorrhagic deaths were reported (two pulmonary and one central nervous system). After this trial was completed, a subsequent sequential cohort of 47 previously treated NSCLC patients were treated on a continuous dosing schedule of sunitinib at 37.5 mg daily. A response rate of 2.1% was reported with a stable disease rate of 19.X%. The median time to progression was 12.3 weeks with a median survival time of 38.1 week. Toxicities were, in general, less frequent and similar to those noted in the initial trial. Sunitinib is currently being evaluated in combination with a number of standard regimens commonly used in NSCLC as well as a maintenance drug after first-line platinum-based treatment of advanced NSCLC. Results of these trials are eagerly awaited and will help define the role of sunitinib in the therapeutic approach to NSCLC.
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PMID:The current status and evolving role of sunitinib in non-small cell lung cancer. 1852 Feb 93

Sorafenib (BAY 43-9006) is a novel oral bis-aryl urea compound originally developed as an inhibitor to RAF kinase for its anti-proliferative property. It also inhibits receptor tyrosine kinases of multiple pro-angiogenic factors such as VEGFR-2/3, Flt-3/ and PDGFR-beta. The combination of both its anti-proliferative and anti-angiogenic properties makes sorafenib an attractive agent in cancer treatment. Phase I studies demonstrated that sorafenib was well tolerated, and the recommended phase II dose was 400 mg twice daily continuously. Common toxicities included skin toxicity (rash and hand-foot syndrome), gastrointestinal toxicities (nausea and diarrhea) and fatigue. Anti-tumor activities were observed in multiple tumors types including renal cell carcinoma and hepatocellular carcinoma. Randomized phase III studies in these tumor types are ongoing, and results are eagerly waited.
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PMID:Sorafenib (BAY 43-9006): review of clinical development. 1866 47

Temsirolimus is a targeted therapy that inhibits mammalian target of rapamycin (mTOR), a central regulator of tumor cell responses to growth stimuli. Temsirolimus has a broad anticancer activity profile that impacts tumor cell growth, proliferation, and survival through its specific inhibition of mTOR. In a randomized phase III trial that enrolled previously untreated patients with advanced renal cell carcinoma (RCC) and poor prognostic features, temsirolimus significantly prolonged overall survival compared with interferon-alpha, a standard therapy (p = 0.008). Because of the results, temsirolimus was approved by the U. S. Food and Drug Administration for treatment and is considered a first-line treatment for patients with advanced RCC with poor prognostic features. Temsirolimus is administered at a flat weekly IV dose of 25 mg given over 30-60 minutes. Gastrointestinal disorders (stomatitis, anorexia, nausea, diarrhea, and vomiting), rash, fatigue, edema, infections, and dyspnea, as well as hematologic and metabolic laboratory abnormalities occur in patients receiving temsirolimus. Metabolic side effects include hyperglycemia, hypercholesterolemia, hypertriglyceridemia, and hypophosphatemia. Most adverse reactions associated with temsirolimus can be managed medically or addressed by supportive measures. Nurses can improve patient outcomes through early recognition of side effects and prompt interventions.
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PMID:Temsirolimus, an mTOR inhibitor for treatment of patients with advanced renal cell carcinoma. 1867 30

Currently, there is no widespread use of percutaneous renal artery embolisation (PRAE) as a pre-operative treatment in the management of renal cell carcinoma (RCC). There is also a scarcity of studies concerning the potential benefits of this procedure. All patients with RCC who underwent pre-operative PRAE before nephrectomy (n = 227) and all patients solely undergoing surgery (n = 607) at our institution from 1992 to 2006 were included. Information on techniques used, perioperative transfusion requirements, pathological and clinical variables, acute toxicity and complications were obtained from a retrospective review of medical records. Propensity modelling techniques were used to compare cancer-specific survival (CSS) and overall survival (OS) in both groups. Propensity scores were calculated from a logistic matching model including age, gender, clinical tumour size, grading, pN stage, cM stage, pT stage, histology and microvascular invasion. This resulted in 189 matches. The mean follow-up of the entire group of matched patients was 81 months. The 5-year actuarial CSS and OS for the total group of matched patients was 80.8% and 73.9%, respectively. CSS and OS did not show any significant differences between the matched treatment groups. There were no statistical differences in surgical complications between all patients treated with pre-operative PRAE (n = 227) and all patients without PRAE (n = 607), except for blood transfusion (61% vs 24%; p<0.01). Symptoms of post-embolization syndrome, including lumbar pain, fever, nausea, hypertension and macroscopic haematuria, were reported by 202 patients (89%), in most cases being mild and self-limited. There is no conclusive evidence that pre-operative PRAE provides survival benefits in the management of surgically resected RCC.
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PMID:Pre-operative renal arterial embolisation does not provide survival benefit in patients with radical nephrectomy for renal cell carcinoma. 2060 14

Angiogenesis is essential for normal tissue and even more so for solid malignancies. At present, inhibition of tumor angiogenesis is a major focus of anticancer drug development. Bevacizumab, a humanized antibody against VEGF, was the first antiangiogenic agent to be approved for advanced non-small cell lung cancer, breast cancer and colorectal cancer. The most commonly observed adverse events are hypertension, proteinuria, bleeding and thrombosis. Sunitinib, a small molecule blocking intracellular VEGF, KIT, Flt3 and PDGF receptors, which regulate angiogenesis and cell growth, is approved for the treatment of advanced renal cell cancer (RCC) and malignant gastrointestinal stromal tumor. The most frequent adverse events include hand-foot syndrome, stomatitis, diarrhea, fatigue, hypothyroidism and hypertension. Sorafenib, an oral multikinase inhibitor, is approved for the second-line treatment of advanced RCC and upfront treatment of advanced hepatocellular carcinoma. Most common adverse events with sorafenib are dermatologic (hand-foot skin reaction, rash, desquamation), fatigue, diarrhea, nausea, hypothyroidism and hypertension. More recently, cardiovascular toxicity has increasingly been recognized as a potential adverse event associated with sunitinib and sorafenib treatment. Elderly patients are at increased risk of thromboembolic events when receiving bevacizumab, and potentially for cardiac dysfunction when receiving sunitinib or sorafenib. The safety of antiangiogenic drugs is of special concern when taking these agents for longer-term adjuvant or maintenance treatment. Furthermore, newer investigational antiangiogenic drugs are briefly reviewed.
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PMID:Antiangiogenic drugs in oncology: a focus on drug safety and the elderly - a mini-review. 1994 Apr 66

PURPOSE Pazopanib is an oral angiogenesis inhibitor targeting vascular endothelial growth factor receptor, platelet-derived growth factor receptor, and c-Kit. This randomized, double-blind, placebo-controlled phase III study evaluated efficacy and safety of pazopanib monotherapy in treatment-naive and cytokine-pretreated patients with advanced renal cell carcinoma (RCC). PATIENTS AND METHODS Adult patients with measurable, locally advanced, and/or metastatic RCC were randomly assigned 2:1 to receive oral pazopanib or placebo. The primary end point was progression-free survival (PFS). Secondary end points included overall survival, tumor response rate (Response Evaluation Criteria in Solid Tumors), and safety. Radiographic assessments of tumors were independently reviewed. Results Of 435 patients enrolled, 233 were treatment naive (54%) and 202 were cytokine pretreated (46%). PFS was significantly prolonged with pazopanib compared with placebo in the overall study population (median, PFS 9.2 v 4.2 months; hazard ratio [HR], 0.46; 95% CI, 0.34 to 0.62; P < .0001), the treatment-naive subpopulation (median PFS 11.1 v 2.8 months; HR, 0.40; 95% CI, 0.27 to 0.60; P < .0001), and the cytokine-pretreated subpopulation (median PFS, 7.4 v 4.2 months; HR, 0.54; 95% CI, 0.35 to 0.84; P < .001). The objective response rate was 30% with pazopanib compared with 3% with placebo (P < .001). The median duration of response was longer than 1 year. The most common adverse events were diarrhea, hypertension, hair color changes, nausea, anorexia, and vomiting. There was no evidence of clinically important differences in quality of life for pazopanib versus placebo. CONCLUSION Pazopanib demonstrated significant improvement in PFS and tumor response compared with placebo in treatment-naive and cytokine-pretreated patients with advanced and/or metastatic RCC.
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PMID:Pazopanib in locally advanced or metastatic renal cell carcinoma: results of a randomized phase III trial. 2081 65

Fatigue is one of the most common symptoms associated with cancer. Persistent fatigue can impair multiple aspects of daily functioning and quality of life, and patients report that treatment-related fatigue has a greater impact than other symptoms, including pain, nausea, and depression. Thus, management of fatigue is recognized as an important component of care for patients with cancer. Treatment of advanced and metastatic renal cell carcinoma (RCC) was, until recently, limited to cytokine-based therapies, which are associated with modest response rates and significant toxicity, including high rates of treatment-related fatigue. The paradigm for RCC treatment has shifted dramatically in the last 5 years with the advent of efficacious targeted therapies. These agents provide the promise of better tolerability because of their more selective mechanisms of action. However, there is considerable variation in the selectivity of targeted agents for RCC, and a review of randomized clinical trials in patients with advanced and/or metastatic disease reveals that there is considerable variation in the tolerability of these agents. Fatigue remains a prominent toxicity with current targeted therapies. Future agents that show better selectivity and potency than current targeted therapies should help to provide better efficacy and tolerability.
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PMID:Fatigue in renal cell carcinoma: the hidden burden of current targeted therapies. 2105 59

The introduction of novel targeted therapies into the clinic in recent years has had a considerable impact on the management of several neoplastic diseases--such as gastrointestinal stromal tumors, hepatocellular carcinomas and renal cell carcinomas--considered until recently refractory to systemic therapies. We describe here two such novel biological agents, sunitinib and sorafenib, as a paradigm of the successful clinical application of new concepts. Sunitinib and sorafenib are small molecule tyrosine kinase inhibitors that target vascular endothelial growth factor receptor, platelet-derived growth factor receptor, C-Kit and others. Both agents are administered orally; sunitinib is tyically given in cycles for 4 consecutive weeks with 2 weeks off, while sorafenib is given continually. Side effects occur in most patients, similar for both agents; they may affect several systems and organs but are mostly mild and easily manageable, rarely requiring discontinuation of the drug. However, these toxicities mandate prompt attention and intervention. The most frequently observed effects are hypertension, nausea, anorexia, asthenia and cutaneous manifestations; cardiac abnormalities may include congestive failure. Sunitinib, and markedly less frequently sorafenib, may cause thyroid gland dysfunction, mainly hypothyroidism. Antitumor activity has been shown for renal cell carcinoma in pivotal trials, for sunitinib as first-line treatment and for sorafenib in previously treated patients as second-line. Sunitinib is now approved as second-line therapy for patients with GIST refractory to imatinib; sorafenib has resulted in a significant prolongation in median survival in patients with hepatocellular carcinoma. Ongoing clinical trials will further define the spectrum of these agents' antitumor activity, their role in combination with other drugs, as well as their optimal dose and schedule of administration.
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PMID:Novel multitargeted anticancer oral therapies: sunitinib and sorafenib as a paradigm. 2109 May 21

What's known on the subject? and What does the study add? The side-effect of targeted agents is known. The clinician should be aware of the side-effects of targeted agents and how to prevent/diminish them, particularly in sequential and combination therapies. The aim of this review is to help physicians tailor targeted treatments for advanced renal cell carcinoma to suit patient needs and ensure maximum overall duration of response to therapy by providing a summary of the frequency and time of onset of adverse events (AEs) and by raising awareness of AE profiles. A PubMed literature search was performed, and papers on targeted therapy-related AEs were reviewed. The frequency, severity and management of targeted therapy-related AEs are discussed. Manageable AEs commonly reported with all the approved targeted agents include: fatigue, gastrointestinal disorders (diarrhoea, nausea, vomiting), hypertension, skin and subcutaneous tissue disorders. Life-threatening AEs are less common than manageable AEs and are usually class specific. Data suggest that long-term treatment with well-established targeted agents does not result in increased or unexpected AEs. Caution is required with regard to the long-term use of newer targeted agents for which there are no long-term tolerability data or clinical experience. Studies have reported that the type and frequency of observed AEs associated with sequential tyrosine kinase inhibitor (TKI) use are similar to those reported in the literature for TKI monotherapy. Having an awareness of the AE profiles of targeted agents allows the development of effective management strategies. Generally, more extensive clinical experience has accumulated, and AE profiles are more predictable, for well-established targeted agents.
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PMID:Adverse events from targeted therapies in advanced renal cell carcinoma: the impact on long-term use. 2125 Nov 88

Purpose Activation of EGFR can stimulate proliferative and survival signaling through mTOR. Preclinical data demonstrates synergistic activity of combined EGFR and mTOR inhibition. We undertook a phase I trial of temsirolimus (T, an mTOR inhibitor) and EKB-569 (E, an EGFR inhibitor) to determine the safety and tolerability. Methods The primary aim was to determine the maximally tolerated dose (MTD) of this combination in adults with solid tumors. Following the dose-escalation phase, (Cohort A), two subsequent cohorts were used to assess any pharmacokinetic (PK) interaction between the agents. Results Forty eight patients were enrolled. The MTD of this combination was E, 35 mg daily and T, 30 mg on days 1-3 and 15-17 using a 28-day cycle. The most common toxicities were nausea, diarrhea, fatigue, anorexia, stomatitis, rash, anemia, neutropenia, thrombocytopenia, and hypertriglyceridemia. Sixteen patients (36%) had at least one grade 3 toxicity. The most frequent grade 3/4 toxicities were diarrhea, dehydration, and nausea and vomiting (19% each). No grade 5 events were seen. Four patients had a partial response and 15 had stable disease. Clinical benefit was seen across a range of tumor types and in all cohorts. PK analysis revealed no significant interaction between E and T. Conclusions This combination of agents is associated with tolerable toxicities at doses that induced responses. PK studies revealed no interaction between the drugs. Further investigations of this targeting strategy may be attractive in renal cell carcinoma, non-small cell lung cancer, alveolar sarcoma, and carcinoid tumor.
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PMID:Phase I study of temsirolimus in combination with EKB-569 in patients with advanced solid tumors. 2188 15


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