Florian Kocher

Small steps of improvement in small-cell lung cancer (SCLC) within two decades: A comprehensive analysis of 484 patients

BACKGROUND It is not clear whether or not the fate of patients suffering from small-cell lung cancer (SCLC) has improved. To better understand the course of disease, we aimed at documenting disease features at initial diagnosis, sequences of therapy modalities and outcome in consecutive patients over two decades. We postulated that SCLC patients might have benefitted from refined diagnosis and treatment options during the last decade. METHODS All SCLC cases diagnosed at the Innsbruck University Hospital and associated institutions between 1991 and 2011 have been documented in detail in accordance with a prespecified protocol. RESULTS A total of 484 patients diagnosed with SCLC were followed. The most important symptoms at initial diagnosis were cough, dyspnea and tumor pain in 55%, 51% and 44%, respectively. Patients who were operated during early stage of disease (n = 26) had a favorable 5-year, relapse-free survival (74%). A total of 112 patients with locally advanced disease were treated by radiochemotherapy in curative intent (RCT), and achievement of CR offered a chance of long term overall survival (OS), reaching 44% after 10-years. In the palliative setting (median OS in 304 evaluable patients, 9.7 months), a therapeutic progress in the more recent decade could not be observed. Parameters independently associated with favorable OS were: response to therapy and prophylactic brain irradiation in patients with RCT; and response, age < 70 years and absence of LDH elevation in the palliative setting. CONCLUSIONS In this comprehensive view on SCLC, the findings on symptomatology, comorbidity, and spectrum of treatments may help to better understand individual courses of the disease. Overall, modern medicine failed to translate into substantial benefit of SCLC patients, except in patients in locally advanced disease receiving multimodal therapy.

Biomarkers of evasive resistance predict disease progression in cancer patients treated with antiangiogenic therapies

Numerous antiangiogenic agents are approved for the treatment of oncological diseases. However, almost all patients develop evasive resistance mechanisms against antiangiogenic therapies. Currently no predictive biomarker for therapy resistance or response has been established. Therefore, the aim of our study was to identify biomarkers predicting the development of therapy resistance in patients with hepatocellular cancer (n = 11), renal cell cancer (n = 7) and non-small cell lung cancer (n = 2). Thereby we measured levels of angiogenic growth factors, tumor perfusion, circulating endothelial cells (CEC), circulating endothelial progenitor cells (CEP) and tumor endothelial markers (TEM) in patients during the course of therapy with antiangiogenic agents, and correlated them with the time to antiangiogenic progression (aTTP). Importantly, at disease progression, we observed an increase of proangiogenic factors, upregulation of CEC/CEP levels and downregulation of TEMs, such as Robo4 and endothelial cell-specific chemotaxis regulator (ECSCR), reflecting the formation of torturous tumor vessels. Increased TEM expression levels tended to correlate with prolonged aTTP (ECSCR high = 275 days vs. ECSCR low = 92.5 days; p = 0.07 and for Robo4 high = 387 days vs. Robo4 low = 90.0 days; p = 0.08). This indicates that loss of vascular stabilization factors aggravates the development of antiangiogenic resistance. Thus, our observations confirm that CEP/CEC populations, proangiogenic cytokines and TEMs contribute to evasive resistance in antiangiogenic treated patients. Higher TEM expression during disease progression may have clinical and pathophysiological implications, however, validation of our results is warranted for further biomarker development.

Predominant expression of truncated EpCAM is associated with a more aggressive phenotype and predicts poor overall survival in colorectal cancer.

Regulated intramembrane proteolysis (RIP) has been shown to be an important mechanism for oncogenic activation of EpCAM through nuclear translocation of the intracellular domain EpICD. Recently, we identified two different membranous EpCAM variants namely EpCAMMF (full‐length) and EpCAMMT (truncated) to be expressed in the majority of human epithelial tumors. The aim of our study was to evaluate the potential role of these two protein variants as additional prognostic biomarkers in colorectal cancer. In most studies only one antibody targeting the extracellular domain of EpCAM (EpEX) has been used, whereas in the present study additionally an antibody which detects the intracellular domain (EpICD) was applied to discriminate between different EpCAM variants. Using immunohistochemistry, we analyzed the expression of EpCAMMF and EpCAMMT variants in 640 patients with colorectal cancer and determined their correlations with other prognostic factors and clinical outcome. A statistically significant association was observed for EpCAMMT with advanced tumor stage (p < 0.001), histological grade (p = 0.01), vascular (p < 0.001) and marginal (p = 0.002) invasion. Survival analysis demonstrated reduced overall survival (p < 0.004) in patients with tumors expressing the EpCAMMT phenotype when compared to patients with tumors expressing the EpCAMMF variant. In conclusion, this study for the first time indicates that expression of EpCAMMT is associated with a more aggressive phenotype and predicts poor survival in patients with colorectal cancer.

Multicenter phase II study evaluating docetaxel and cisplatin as neoadjuvant induction regimen prior to surgery or radiochemotherapy with docetaxel, followed by adjuvant docetaxel therapy in chemonaive patients with NSCLC stage II, IIIA and IIIB (TAX-AT 1.203 Trial).

OBJECTIVES Neoadjuvant therapy with a platinum based doublet is an option in NSCLC patients with upfront resectable disease. However, the role of neoadjuvant induction in stages IIIA and IIIB and in initially not resectable patients is unclear. PATIENTS AND METHODS In this phase II trial, 78 patients with locally advanced NSCLC, of whom 56 were considered not resectable at initial diagnosis, were treated with three neoadjuvant cycles of docetaxel and cisplatin and subjected to radical surgery if resectable. Definitive radiochemotherapy (RCT) using weekly docetaxel was the prespecified alternative if patients were not resectable at restaging. The primary objective was response to neoadjuvant induction. RESULTS After induction, 36 (46%) were radically operated and 24 (31%) were treated with RCT. Overall, 32 patients (41%) completed the entire study plan. Partial response to induction therapy was observed in 43 patients (55%); furthermore, 19 of 56 initially not resectable cases (34%) became resectable upon induction. Median progression-free (PFS) and overall survival (OS) were 8.5 and 16.4 months for the whole cohort. Encouragingly, conversion to resectability was predictive for favorable outcome. On the other hand, patients who were not resectable at restaging and received RCT were characterized by a rather unfavorable prognosis (5-year and 10-year OS, whole cohort: 20% and 12%; RCT: 8% and 0%; surgery: 37% and 24%, respectively). CONCLUSION Neoadjuvant induction with the doublet docetaxel/cisplatin and subsequent radical resection resulted in favorable survival. Of note, conversion to resectability was mandatory for the chance of cure in patients considered initially not resectable.

What's new in small cell lung cancer – extensive disease? An overview on advances of systemic treatment in 2016

Systemic therapy options for small cell lung cancer patients with extensive disease remain poor. After an initial response on first-line therapy, virtually all patients develop disease progression. For those who showed an initial response only few therapy options with low response rates are currently available. Until now, many experimental and targeted agents have failed to yield convincing clinical benefits, and new therapy options are clearly warranted for these patients. In this years oncological congresses, several new therapy strategies, including checkpoint inhibition, showed promising results in ongoing trials. Furthermore, a potential benefit of new agents targeting DLL3, Aurora A kinase and PARP-inhibitor was reported. In this review we summarize new developments and critically highlight the most important and promising data in the relapsed small cell lung cancer disease.

On the Article “Nodal Upstaging Is More Common with Thoracotomy Than with VATS during Lobectomy for Early-Stage Lung Cancer: An Analysis from the National Cancer Data Base” by Medbery et al.

To the Editor: We have read with great interest the manuscript by Medbery et al. on nodal upstaging during lobectomy for early-stage lung cancer. According to the authors nodal upstaging was more common with thoracotomy than with video-assisted thoracoscopic surgery (VATS). This analysis of data extracted from the National Cancer Data Base truly provides a realistic picture of daily thoracic surgery practice in the United States. We would like to comment on important factors that might have confounded nodal upstaging in this analysis. As already mentioned by the authors, central versus peripheral tumor location might be an important cofactor for upstaging in clinically nodal-negative patients. This has recently been demonstrated by Decaluwé et al. in a single-center analysis in which the risk for upstaging was more dependent on tumor localization than on the surgical approach. Tumor localization is the most important factor guiding the decision regarding a surgical approach. Thus, we suspect that in centrally located tumors requiring complex procedures, open surgery was preferred. It is obvious, that with increasing VATS experience, centers expand the indication for a minimally invasive approach. With a higher prevalence of VATS resections including more centrally located tumors, we would expect more nodal upstaging. This argument is

Multicenter Phase II Study Evaluating Two Cycles of Docetaxel, Cisplatin and Cetuximab as Induction Regimen Prior to Surgery in Chemotherapy-Naive Patients with NSCLC Stage IB-IIIA (INN06-Study)

Background Different strategies for neoadjuvant chemotherapy in patients with early stage NSCLC have already been evaluated. The aim of this study was to evaluate the tolerability and efficacy of a chemoimmunotherapy when limited to two cycles. Methods Between 01/2007 and 03/2010 41 patients with primarily resectable NSCLC stage IB to IIIA were included. Treatment consisted of two cycles cisplatin (40 mg/m2 d1+2) and docetaxel (75 mg/m2 d1) q3 weeks, accompanied by the administration of cetuximab (400 mg/m2 d1, then 250 mg weekly). The primary endpoint was radiological response according to RECIST. Results 40 patients were evaluable for toxicity, 39 for response. The main grade 3/4 toxicities were: neutropenia 25%, leucopenia 11%, febrile neutropenia 6%, nausea 8% and rash 8%. 20 patients achieved a partial response, 17 a stable disease, 2 were not evaluable. 37 patients (95%) underwent surgery and in three of them a complete pathological response was achieved. At a median follow-up of 44.2 months, 41% of the patients had died, median progression-free survival was 22.5 months. Conclusions Two cycles of cisplatin/ docetaxel/ cetuximab showed promising efficacy in the neoadjuvant treatment of early-stage NSCLC and rapid operation was possible in 95% of patients. Toxicities were manageable and as expected. Trial Registration EU Clinical Trials Register; Eudract-Nr: 2006-004639-31

Cardiovascular Comorbidities and Events in NSCLC: Often Underestimated but Worth Considering

INTRODUCTION Patients with non-small-cell lung cancer (NSCLC) and cardiovascular (CV) disease often share a comparable demographic profile. The aim of this analysis was to assess the significance and prevalence of preexisting CV comorbidity and events in NSCLC. PATIENTS AND METHODS A total of 715 consecutive NSCLC patients diagnosed between 2004 and 2009 at the Medical University of Innsbruck were retrospectively assessed regarding CV comorbidities, risk factors, cancer treatment, CV events occurring after the start of treatment, and outcome. RESULTS At least one CV comorbidity was present in 462 (67.2%) of 687 evaluable patients. CV events were documented in 68 patients (9.5%), with conduction disorders being the most prevalent (n = 19), followed by cardiomyopathy (n = 13), myocardial infarction (n = 13), sudden CV death (n = 12), need of revascularization (n = 6), and pericardial effusion (n = 5). Median time between diagnosis of NSCLC and CV event was 13.9 months. CV comorbidities and events both showed a direct correlation with increasing age, affecting up to 87.3% and 35.2% of all octogenarians in the study, respectively. The following CV comorbidities were significantly associated with CV events: atrial fibrillation, myocardial infarction, and cardiomyopathy. Overall survival was not reduced in patients experiencing a CV event compared to patients without an event. CONCLUSION CV disease and events are frequently observed in NSCLC patients. To provide definitive recommendations on impact, prevention, and screening of CV disease in NSCLC, prospective trials are desirable.

ASCO 2013: new developments in lung cancer

At American Society of Clinical Oncology meeting 2013, some new data were presented, which might have a practice-changing potential. Epidermal growth factor receptor mutational testing was successfully performed in plasma samples, giving hope that tumor biopsies might be replaced by a more comfortable blood analysis. Some studies focused on new second-generation anaplastic lymphoma kinase inhibitors, which showed an impressive efficacy even in crizotinib refractory patients in phase I/II studies and support a sequence of tyrosine kinase inhibitors (TKIs) in this sub-entity of non-small-cell lung cancer (NSCLC). Immunological strategies are worth being tested also in lung cancer, as different strategies have proven first signs of efficacy (MUC1 antigen-specific cancer immunotherapy, programmed cell death ligand 1). Finally, a large phase III trial found that a new oral vascular endothelial growth factor receptor, fibroblast growth factor receptor, and platelet-derived growth factor receptor TKI (nintedanib) combined with docetaxel improved outcome in second-line NSCLC patients when compared with docetaxel monotherapy.