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About 172,570 new cases ofnon–small-cell lung cancer(NSCLC) are expected to bediagnosed in 2005 in the United States,and almost as many will die of thedisease. Patients with effusions or metastaticdisease are candidates for combinationchemotherapy. The regimensof choice are platinum-based combinationchemotherapy schedules. Giventhat most patients will experience diseaseprogression despite their initialtreatment, they may be eligible for second-line chemotherapy, provided theyhave an acceptable performance status.

We applaud Dr. Cappuzzo andcolleagues for an excellentreview of an emerging fieldin lung cancer treatment. Since 2000,three drugs (docetaxel [Taxotere],pemetrexed [Alimta], and erlotinib[Tarceva]) have been approved by theUS Food and Drug Administration(FDA) for second-line therapy in non–small-cell lung cancer (NSCLC) basedon the results of phase III trials (seeTable 1).[1-4] It is also possible thatsimilar approval will be sought for otherdrugs (eg, topotecan [Hycamtin]),[5]and gefitinib (Iressa) remains an optionfor treatment in the third-line setting.

ORLANDO - Combined immunochemotherapy results in superior remission rates and overall survival in recurrent follicular and mantle cell lymphoma, and providing rituximab (Rituxan) maintenance therapy prolongs duration of response, according to new findings presented by Martin Dreyling, MD, PhD, at the American Society of Clinical Oncology 41st Annual Meeting (abstract 6527 and abstract 6528). "Combined immunotherapy resulted in superior remission rates and survival rates," said Dr. Dreyling, of the University of Munich, Germany. "To the best of my knowledge, this is the first study that proves that on a solid base of data."

Platinum-based chemotherapy offers a modest survival advantage overbest supportive care in chemotherapy-naive patients with a good performancestatus and advanced/metastatic non–small-cell lung cancer(NSCLC). Despite the survival benefit associated with first-line chemotherapy,the majority of patients will experience relapse or disease progression.In clinical practice, an increasing number of patients maintaina good performance status after first-line treatment and are eligible forfurther treatments. Docetaxel (Taxotere) at 75 mg/m2 given once every3 weeks has been the standard of care for second-line chemotherapy sincethe year 2000. Pemetrexed (Alimta) is a novel multitargeted antifolateagent with single-agent activity in first- and second-line treatment ofNSCLC. A large phase III study comparing docetaxel to pemetrexed insecond-line therapy demonstrated that pemetrexed is equally active andless toxic than docetaxel. Based on these results, pemetrexed is a reasonablesecond-line chemotherapy option for patients with recurrent, advancedNSCLC. Progress made in the field of molecular biology has led to theidentification of drugs active against specific cellular targets. Gefitinib(Iressa) and erlotinib (Tarceva) are both orally active tyrosine kinase inhibitorsof the epidermal growth factor receptor. Phase II and III trialshave demonstrated that these agents are active particularly in a subgroupof patients with specific biologic characteristics. Both drugs have beenapproved for the treatment of pretreated NSCLC. Other drugs, such ascetuximab (Erbitux) and bevacizumab (Avastin) have shown promisingactivity in NSCLC and are currently being tested in clinical trials.

Cappuzzo and colleagues havereviewed the present optionsof salvage therapy for advancednon–small-cell lung cancer(NSCLC). This issue is highly relevantnowadays, as many patients whofail palliative chemotherapy are stillin sufficiently good condition to receiveadditional therapy. It is ratherinstructive to note that 10 years agothe use of systemic chemotherapy foradvanced NSCLC was advocated butstill not standard, and today we haveseveral options for treating patients inthe second- and even third-line setting.Among these options are agents thatspecifically target molecular featuresof lung cancer, such as the epidermalgrowth factor receptor (EGFR)

At this time there is no therapy that can restore vision after retinal ganglion cell (RGC) death in patients with glaucoma. However, stem cell-based treatments do have the potential to restore function in individuals with various neurodegenerative diseases, reported Keith R. Martin, MD, of Cambridge University, Cambridge, England, at the annual meeting of the Association for Research in Vision and Ophthalmology.

At this time there is no therapy that can restore vision after retinal ganglion cell (RGC) death in patients with glaucoma. However, stem cell-based treatments do have the potential to restore function in individuals with various neurodegenerative diseases, reported Keith R. Martin, MD, of Cambridge University, Cambridge, England, at the annual meeting of the Association for Research in Vision and Ophthalmology.

Squamous cell carcinomas of the head and neck are highly responsiveto induction chemotherapy. However, randomized trials have failedto demonstrate a survival advantage with the addition of induction chemotherapyto locoregional therapy consisting of surgery and/or radiationtherapy. Currently, concomitant radiation and chemotherapy hasemerged as a standard and has optimized locoregional control in headand neck cancer. In this setting, the addition of induction chemotherapymay further improve outcome by enhancing both locoregional and distantcontrol. As interest in induction regimens is renewed, we elected toconduct a systematic review of trials of induction chemotherapy forlocoregionally advanced head and neck cancer. The most studied combination-cisplatin plus fluorouracil (5-FU)-achieves objective responserates of about 80%. In a meta-analysis, induction with platinum/5-FU resulted in a small survival advantage over locoregionaltherapy alone. The introduction of a taxane into induction chemotherapyregimens has produced promising results. Induction chemotherapyshould be the subject of further clinical research in head andneck cancer. Randomized clinical trials in which the control arm isconcurrent chemoradiotherapy and the experimental arm is inductionchemotherapy followed by concurrent chemoradiotherapy are planned.Platinum/taxane combinations are the preferred regimens for furtherstudy in the induction setting and a suitable platform with which toinvestigate the addition of novel targeted agents.

The variability and complexity of central nervous system germ cell tumors have led to controversy in both diagnosis and management. If a germ cell tumor is suspected, the measurement of cerebrospinal fluid and serum alpha-fetoprotein and beta–human chorionic gonadotropin is essential. A histologic specimen is not necessary if the patient has elevated levels; however, if the tumor markers are negative, a biopsy is needed to confirm the diagnosis of a germinoma. Germinomas are extremelyradiosensitive, enabling 5-year survival rates that exceed 90%. Treatment has traditionally included focal and craniospinal axis irradiation; however, multiple ongoing studies are being conducted to examinethe efficacy of reduction or elimination of radiation therapy with the addition of chemotherapy. Nongerminomatous germ cell tumors, on the other hand, are relatively radioresistant with a poorer outcome. The combination of chemotherapy and irradiation is associated with overall survival rates of up to 60%. This article provides a review of the controversies in diagnosis and treatment of central nervous system germ cell tumors.

Priming of leukemic cells with cytokines may enhance the efficacy of cell-cycle chemotherapy. In this study, we utilized these synergistic effects of granulocyte-macrophage colony-stimulating factor (GM-CSF, sargramostim [Leukine]), hydroxyurea, and low-dose cytosine arabinoside to treat elderly patients with acute myelogenous leukemia (AML) or myelodysplastic syndrome (MDS). In a single-institution, retrospective study, we evaluated 94 treatments with concomitant hydroxyurea, cytosine arabinoside, and GM-CSF between the years of 1997 and 2003 in high-risk elderly patients with AML or MDS. A total of 80% of patients received all of the GM-CSF doses; 78% of patients received all of the cytosine arabinoside doses. Adverse events were minimal. No patient developed mucositis or alopecia. The most common adverse event was neutropenic fever, which was noted in 57% of patients. Twenty-one percent of patients remained neutropenic after treatment until death or relapse. Sixty-eight percent of patients reached an absolute neutrophil count of greater than 1,000 μL in a median of 33.5 days. Our data show an overall response rate of 52%, with a complete response rate of 39% and a partial response rate of 13%. Overall, our study showed that low-dose cytosine arabinoside given by continuous infusion together with continuous infusion GM-CSF and hydroxyurea was well-tolerated and effective in treating elderly AML and MDS patients who were not eligible for standard induction therapy.

The most common subtype of aggressive non-Hodgkin’s lymphomais diffuse large B-cell lymphoma (DLBCL). Diffuse large B-cell lymphomarepresents a heterogeneous entity, with 5-year overall survivalrates ranging from 26% to 73%. Microarray gene expression studieshave confirmed that biologically distinct subgroups exist within DLBCL,and can be correlated with outcome. Initial management is usuallyguided by stage of disease at presentation. Approximately 25% of patientswith DLBCL present with limited-stage disease and are treatedwith combined-modality therapy (brief chemotherapy and involved-fieldradiation). Most patients present with advanced-stage disease and requiretreatment with an extended course of chemotherapy. The CHOP(cyclophosphamide, doxorubicin HCl, vincristine [Oncovin], prednisone)chemotherapy regimen has been the mainstay of therapy sinceits development in the 1970s, as more intensive chemotherapy regimensfailed to show additional benefit. The era of monoclonal antibodieshas transformed treatment practices for aggressive lymphoma andhas led to a significant improvement in outcome. A randomized trialcomparing the use of rituximab (Rituxan), a chimeric anti-CD20 IgG1monoclonal antibody, combined with CHOP chemotherapy vs CHOPchemotherapy alone for elderly patients with advanced-stage DLBCLdemonstrated a significant benefit for the combination approach. Thisfinding has now been confirmed in two additional randomized, controlledtrials and a population-based analysis, making CHOP andrituximab the standard of care for all newly diagnosed patients withDLBCL. Despite this advance, newer therapies are needed and manyare under active investigation. The insights gained from molecular techniquessuch as gene expression profiling should permit identificationof additional lymphoma-specific therapeutic targets and the developmentof novel agents that take into account underlying biology andallow for greater tailoring of therapy.

The most common indolent lymphoma, follicular lymphoma comprises 35% of adult non-Hodgkin’s lymphoma (NHL) in the United States and 22% worldwide. Features associated with adverse outcome include age, male gender, disease stage, and performance status, with the International Prognostic Index being the most widely used risk classification system. Long-term disease-free survival is possible in select patient subgroups after treatment, but very late relapses suggest that quiescent lymphoma cells might be harbored for long periods of time. Radiation therapy is the mainstay of treatment for limited-stage follicular lymphoma, but there is some experience with chemotherapy and combined chemoradiation. When to initiate treatment in patients with advanced disease is controversial, but options include various combined chemotherapy regimens, monoclonal antibodies, radiolabeled antibodies, and bone marrow or stem cell transplantation. Future directions in the treatment of follicular lymphoma include vaccines, antisense therapy, and proteasome inhibitors.

Vaccines are a promising but still experimental treatment for melanoma.They are intended to stimulate immune responses against melanomaand by so doing, increase resistance against and slow the progressionof this cancer. Key requirements for vaccines to be effectiveare that they contain antigens that can stimulate tumor-protective immuneresponses and that some of these antigens are present on thetumor to be treated. Unfortunately, these antigens are still not known.To circumvent this problem, polyvalent vaccines can be constructedcontaining a broad array of melanoma-associated antigens. Severalstrategies are available to construct such polyvalent vaccines; each hasadvantages and disadvantages. Clinical trials have shown that vaccinesare safe to use and have much less toxicity than current therapy formelanoma. Vaccines can stimulate both antibody and T-cell responsesagainst melanoma, with the type of response induced, its frequency,and its magnitude depending on the vaccine and the adjuvant agentused. A growing body of evidence suggests that vaccines can be clinicallyeffective. This evidence includes correlations between vaccineinducedantibody or T-cell responses and improved clinical outcome,clearance of melanoma markers from the circulation, improved survivalcompared to historical controls, and most convincingly, two randomizedtrials in which the recurrence-free survival of vaccine-treatedpatients was significantly longer than that of control groups.

Overexpression of cyclooxygenase-2 (COX-2) is frequently presentin lung cancer and may play a significant role in carcinogenesis, invasion,and metastasis. It has been associated with shortened survival inpatients with resected early-stage adenocarcinoma of the lung. COX-2inhibition decreases tumor cell proliferation in vivo and has been shownto enhance tumor radiosensitivity. Additionally, COX-2 inhibition mayprotect normal pulmonary tissue from radiation fibrosis. Clinical studiesare under way to assess the potential benefits and risks of COX-2inhibition in the treatment of lung cancer. The rationale for COX-2inhibitors in the treatment of lung cancer will be reviewed. The resultsof a phase II study assessing the acute toxicity of concurrent celecoxib(Celebrex) and thoracic irradiation in patients with non–small-cell lungcancer (NSCLC) are reported, and an ongoing Radiation TherapyOncology Group study using celecoxib and concurrent radiation therapyfor NSCLC in patients with intermediate prognostic factors is reviewed.

The epidermal growth factor receptor (EGFR) plays an importantrole in cell growth, differentiation, and survival. Targeting EGFR inpatients with colorectal cancer has become an important therapeutictool. Recently, a monoclonal antibody against the extracellular domainof the receptor (cetuximab [Erbitux]) has been approved for the treatmentof patients with EGFR-positive metastatic disease refractory toirinotecan (Camptosar)-based therapy. The role of other targeted agentsagainst EGFR, including other monoclonal antibodies as well as inhibitorsof the intracellular tyrosine kinase domain, will also be discussed.

Defects in the regulation of apoptosis (programmed cell death) makeimportant contributions to the pathogenesis and progression of mostcancers and leukemias. Apoptosis defects also figure prominently inresistance to chemotherapy, radiotherapy, hormonal therapy, andimmune-based treatments. Apoptosis is caused by activation ofintracellular proteases, known as caspases, that are responsible directlyor indirectly for the morphologic and biochemical events thatcharacterize the apoptotic cell. Numerous proteins that regulate thesecell death proteases have been discovered, including proteins belongingto the Bcl-2, inhibitor of apoptosis, caspase-associated recruitmentdomain, death domain, and death effector domain families. Thesecaspase-regulating proteins provide mechanisms for linkingenvironmental stimuli to cell death responses or to maintenance of cellsurvival. Alterations in the expression and function of several apoptosisregulatinggenes have been demonstrated in cancer, suggesting targetsfor drug discovery. Knowledge of the molecular details of apoptosisregulation and the three-dimensional structures of apoptosis proteinshas revealed new strategies for identifying small-molecule drugs thatmay yield more effective treatments for malignancies. Apoptosisregulatinggenes are also beginning to find utility as targets for antisenseoligonucleotides.

Although no overall differences in survival have been observed betweenthe many chemotherapy combinations in non–small-cell lungcancer, the clinical application of mRNA expression levels of amplifiedgenes may disclose many genetic influences on cytotoxic drug sensitivityand enable clinicians to tailor chemotherapy according to eachindividual’s gene profile. Specifically, the assessment of ribonucleotidereductase subunit M1 and thymidylate synthase mRNA expression levelsmight select patients who benefit from gemcitabine (Gemzar) orpemetrexed (Alimta) combinations. Until recently, clinical prognosticfactors such as performance status, weight loss, and lactate dehydrogenasewere the only parameters used to predict chemotherapy responseand survival. However, accumulated data indicate that overexpressionof genes involved in cancer glycolysis pathways plays an important role,and might be an independent mechanism of chemoresistance. Thedysregulation of glycolytic genes is affected by growth signals involvingthe PI3K/Akt pathway and downstream genes such as hypoxiainduciblefactor-1-alpha. One can thus envision that substantial improvementsin therapeutic outcome could benefit from the integrationof tailored ribonucleotide reductase-dependent chemotherapy, ribonucleotidereductase antisense therapy, and targeted therapy.

Candidiasis and aspergillosis are the most common fungal infectionsin hematopoietic stem cell transplant recipients and other hematology/oncology patients. Strategies for reducing the morbidity and mortalityassociated with these infections include antifungal prophylaxis,empiric therapy in patients with persistent fever and neutropenia, andpreemptive therapy. Antifungal therapies include amphotericin B deoxycholate,lipid formulations of amphotericin B, the triazoles (fluconazole,itraconazole, and voriconazole), and the echinocandins (caspofunginand the investigational agents micafungin and anidulafungin).Fluconazole is a reasonable choice for the treatment of invasive candidiasisif the patient has not previously received a triazole and theinstitution has a low incidence of triazole resistance. If resistance is aconcern, an echinocandin, such as caspofungin, is an appropriate option.Voriconazole may be the initial choice in most patients with invasiveaspergillosis. If patients are intolerant of or refractory to conventionaltherapy, effective alternatives include a lipid formulation of amphotericinB or an echinocandin.

Lung cancer remains the leading cause of cancer death in Americanmen and women. Non–small-cell lung cancer (NSCLC) accountsfor 85% of these cases. Although surgery is the best curative approachfor resectable NSCLC, long-term survival for patients with operabledisease remains poor. More than half of patients who initially presentwith stage I to IIIA disease experience relapse of metastatic disease.Postoperative adjuvant therapy has been evaluated in several randomizedtrials, and provides a survival benefit. It appears reasonable tolook to induction chemotherapy, or preoperative chemotherapy, to providea similar improvement in survival with early treatment ofmicrometastatic disease. Multiple trials of induction therapy have beencarried out with encouraging results. The use of various induction regimenswith chemotherapy alone or chemotherapy combined with radiotherapyfor stage IIIA NSCLC is under investigation. Randomized trialsare under way to better define the role of induction therapy in themultimodality treatment of NSCLC.

The treatment of breast cancer has progressed substantially overthe past 15 years. Data from randomized adjuvant trials have shownthat the risk of disease recurrence and death is significantly reducedwhen adjuvant chemotherapy and/or hormonal therapy is added to treatment.As new strategies are incorporated, one of the continued controversiesin patient management is whether adjuvant anthracyclinesshould be the preferred treatment for all patients. Data from randomizedand translational clinical trials have become available and arehelping to elucidate the proper role of anthracyclines, as well as their acuteand long-term toxicities. In most situations, an anthracycline is currentlypreferred, but other single and combination chemotherapies arecurrently under evaluation and appear promising for use in the adjuvantsetting. Continued breast cancer research using molecular markers(such as topoisomerase II–alpha and gene clusters) as predictors oftreatment response, could help individualize decisions regardingwhether to incorporate anthracyclines into adjuvant therapy regimens.

Iowa City, IA-The development of gene-directed therapy for common genetic ocular diseases that will be deployable on a population scale rests on coordinated research involving a series of steps. However, judging from progress made so far, such modalities might become clinically available soon, said Edwin M. Stone, MD, PhD.

Several decades of chemotherapy trials in non–small-cell lung cancer(NSCLC) have clearly shown a survival benefit for chemotherapyover best supportive care. However, only short-lived responses are attained,with an average of four cycles of chemotherapy, before tumorprogression is observed. Second-line chemotherapy has been demonstratedto improve outcome, with docetaxel (Taxotere) as the predominantcytotoxic drug. A recent randomized trial in second-line NSCLCindicated that the novel drug pemetrexed (Alimta) attained the sameresponse, time to progression, and survival as docetaxel. This findingushers in a new age in second-line treatment that can be further invigoratedby the addition of targeted agents. Accumulated evidence indicatesthat overexpression of epidermal growth factor receptor andHER2/neu, which occurs frequently in NSCLC, leads to the deregulationof PI3K and MAPK, activating Akt and enhancing chemoresistance.Future clinical trials in NSCLC will include tailored andmultitargeted therapy and pemetrexed represents a significant step forSward in this direction.

The presence of regional nodal metastases represents a significantadverse prognostic factor for patients with squamous cell carcinoma ofthe head and neck. Early-stage head and neck cancers, localized to theprimary site without regional lymph node metastases have excellentcure rates with either surgery or radiation therapy. The presence ofregional metastases results in cure rates that are approximately half ofthose obtainable in early-stage disease. Therefore, due to the significantadverse impact of neck metastases on prognosis, the treatment ofthe neck remains a vital part of the decision-making process in determiningtherapy for head and neck cancer.

Data from adjuvant trials clearly indicate that one of the most importantproblems in patients with resected non-small-cell lung cancer(NSCLC) is compliance to chemotherapy. In the postoperative setting,significant comorbidities and incomplete recovery after surgery oftenmake it difficult for patients to tolerate or comply with systemic therapy.Therefore, it may be preferable to deliver chemotherapy before surgeryas "neoadjuvant" or "induction" chemotherapy. The rationale for usinginduction chemotherapy is based on evidence that chemotherapymight reduce tumor burden and possess activity againstmicrometastases, resulting in improved results by surgery, radiotherapy,or a combination. Moreover, induction therapy facilitates in vivo assessmentof tumor response or resistance. Potential drawbacks includethe risk of perioperative complications, and the possibility that the tumormass may become unresectable due to disease progression. Duringthe past decade, four phase III randomized trials evaluated the roleof induction chemotherapy in stage IIIA NSCLC. The first three studiesconsistently showed that induction chemotherapy improves survivalcompared with surgery alone. More recently, a large phase III trialperformed by French investigators suggested a survival benefit in stageI/II patients, but not stage IIIA. The high activity of new platinumbasedchemotherapy-based on response rate and 1-year survival inadvanced disease-reinforces the rationale for the use of these newcombinations in early-stage NSCLC, especially for a subset of patientstraditionally treated with surgery alone. Several phase III trials arecurrently evaluating the role of new doublets as induction chemotherapy;these are discussed in the article. The results of these ongoingphase III trials should help clarify the role of induction chemotherapyin early-stage disease.

Any T-cell-mediated disease benefits from therapy without affecting other inflammatory pathways

Any T cell-mediated disease found to benefit from this therapy without affecting other inflammatory pathways

Any T-cell-mediated disease benefits from therapy without affecting other inflammatory pathways

Lung cancer is a major health problem worldwide. Non–small-celllung cancer (NSCLC) accounts for 80% to 85% of all lung cancers,while small-cell lung cancer (SCLC) accounts for 15% to 20% of cases.For early-stage and locally advanced NSCLC (stages I through III), amultimodality treatment approach is appropriate because it improvessurvival. Combination chemotherapy is currently the standard treatmentfor good performance patients with metastatic disease. Elderlypatients (≥ 70 years) with metastatic NSCLC also benefit from treatment.In SCLC, concurrent radiation therapy and chemotherapy is thestandard for limited disease, while chemotherapy is the treatment forextensive disease. Novel innovative therapies, which could includemolecular targeting agents, are needed to treat both NSCLC and SCLC.