scout

Authors

Latest Article

First-Line Treatment for Advanced Non–Small-Cell Lung Cancer

With best supportive care alone, patients with metastatic non–smallcelllung cancer (NSCLC) have a median survival of 4 to 5 months anda 1-year survival rate of approximately 10%. Trials carried out in the1980s and 1990s comparing chemotherapy to best supportive care reportedvariable efficacy results; however, a pivotal meta-analysis of thesedata indicated that cisplatin-based chemotherapy provided a survivalbenefit in advanced NSCLC. In the past decade newer agents such asgemcitabine (Gemzar), vinorelbine, paclitaxel, and docetaxel (Taxotere)have all demonstrated activity in NSCLC as single agents; consequentlythese agents have been combined with cisplatin or carboplatin. Randomizedphase III trials comparing these “newer” platin-based doubletshave failed to identify an optimal platinum-based doublet therapyregimen. Though it is clear that chemotherapy is an appropriate treatmentfor many patients with lung cancer, there a sense in which the useof traditional chemotherapeutic agents has reached a therapeutic plateau.Increased understanding of cancer biology has revealed numerouspotential therapeutic strategies, including targeting the epidermalgrowth factor receptor, protein kinase C, rexinoid receptors, and theangiogenesis pathway. The Eastern Cooperative Oncology Group studyE4599 comparing paclitaxel/carboplatin with/without bevacizumab isthe first phase III randomized trial to show a survival advantage withthe addition of a molecularly targeted agent to chemotherapy in thechemotherapy-naive patient population. Future studies will involve theevaluation of additional targeted agents plus chemotherapy as well aslooking at combinations of these targeted agents alone or with chemotherapy.

Latest Article

Long-Term Toxicities of Selective Estrogen-Receptor Modulators and Antiaromatase Agents

Published literature indicates that the selective estrogen-receptormodulators (SERMs) tamoxifen and raloxifene (Evista) have favorableeffects on bone density, lipid profiles, and the incidence of secondbreast cancers, and unfavorable effects on the incidence of venousthrombosis and hot flushes. Tamoxifen increases the risk of endometrialcancer, but raloxifene does not. The effects of SERMs on sexualfunction and cognition are unclear. Because the selective antiaromataseagents are relatively new, the long-term effects of these agentson normal tissues are less well established. It appears that the nonsteroidalagents (anastrozole [Arimidex], letrozole [Femara]) and steroidal(exemestane [Aromasin]) antiaromatase agents may have differenteffects on normal tissues. Preliminary data demonstrate that anastrozoleincreases the risk of arthralgias and produces a decrease in bonedensity. In contrast, exemestane appears to favorably affect bonedensity and lipid profile, similar to tamoxifen and raloxifene. Theincidence of contralateral breast cancer is decreased in women onadjuvant anastrozole, but data for the other antiaromatase agents arenot yet available. Hot flushes have been reported with the use ofselective aromatase inhibitors, but their incidence seems to be comparableto what is reported with SERMs. Antiaromatase agents do notappear to cause venous thrombosis. More information about the effectsof the antiaromatase agents on normal tissue will become available asdata from ongoing adjuvant and chemoprevention trials are reported.Clinically, we should be conscious of the differences between antiaromataseagents and SERMs and their impact on women’s health.