Valerio Nardone

The combined EGFR protein expression analysis refines the prognostic value of the MGMT promoter methylation status in glioblastoma

BACKGROUND/AIMS To investigate the combined prognostic value of the EGFR expression level and the MGMT promoter methylation status in Glioblastoma (GB). METHODS We assessed the EGFR protein expression level by immune-histochemical (IHC) evaluation and the MGMT promoter methylation status by Polymerase Chain Reaction (PCR) in 169 patients affected by GB. We assessed the prognostic significance of combined MGMT methylation status and EGFR expression level in terms of Overall Survival (OS) with univariate and multivariate analysis, and validated this finding using an external data set of GB patient. RESULTS Clustering survival analysis for the methylation status of MGMT (methMGMT/unmethMGMT) and EGFR expression (High EGFR: H-EGFR; Low EGFR: L-EGFR), identified three different prognostic groups (p=0.001), as follows. Patients with unmethMGMT/H-EGFR had the shortest survival time (median OS: 5 months) and patients co-expressing methMGMT/L-EGFR had the best prognosis (median OS: 35 months), as compared to the other two sub-groups (methMGMT/H-EGFR; unmethMGMT/L-EGFR), which had respectively median OSs of 11 and 12 months. The combined MGMT methylation and EGFR amplification status analysis showed a similar prognostic impact in an independent series, which we used for validation (p=0.001). CONCLUSIONS The EGFR expression evaluation refines the prognostic value of MGMT methylation status in GBs.

Combined Epidermal Growth Factor Receptor and Beclin1 Autophagic Protein Expression Analysis Identifies Different Clinical Presentations, Responses to Chemo- and Radiotherapy, and Prognosis in Glioblastoma

Dysregulated EGFR in glioblastoma may inactivate the key autophagy protein Beclin1. Each of high EGFR and low Beclin1 protein expression, independently, has been associated with tumor progression and poor prognosis. High (H) compared to low (L) expression of EGFR and Beclin1 is here correlated with main clinical data in 117 patients after chemo- and radiotherapy. H-EGFR correlated with low Karnofsky performance and worse neurological performance status, higher incidence of synchronous multifocality, poor radiological evidence of response, shorter progression disease-free (PDFS), and overall survival (OS). H-Beclin1 cases showed better Karnofsky performance status, higher incidence of objective response, longer PDFS, and OS. A mutual strengthening effect emerges in correlative power of stratified L-EGFR and H-Beclin1 expression with incidence of radiological response after treatment, unifocal disease, and better prognosis, thus identifying an even longer OS group (30 months median OS compared to 18 months in L-EGFR, 15 months in H-Beclin1, and 11 months in all GBs) (P = 0.0001). Combined L-EGFR + H-Beclin1 expression may represent a biomarker in identifying relatively favorable clinical presentations and prognosis, thus envisaging possible EGFR/Beclin1-targeted therapies.

The effects of radiotherapy on the survival of patients with unresectable non-small cell lung cancer

ABSTRACT Introduction: Lung cancer represents the leading cause of cancer mortality across the worlds. At present, less than 30% of the patients can undergo curative surgery, while the majority of them (65%) are diagnosed with metastatic disease and directed to systemic treatments. In this context there is a subset of patients (25%) with locally advanced stage disease whose outcome might be improved by using combined strategies of treatment including chemotherapy, radiotherapy and surgery. Areas covered: Here we reviewed possible combination strategies aimed to improve the outcome of lung cancer patients, focusing on the role of radiotherapy both in the adjuvant and oligo-metastatic setting and in synergy with immunotherapy, and finally, we afforded the new challenges concerning the advanced RT and precision oncology. We carried out a focused analysis concerning the key clinical management weaknesses as well as the potential that current research holds. Expert commentary: We believe that the most promising clinical trials in this specific patient subset will build their rationale on the results of well-designed translational models aimed to test the combination of cytotoxic drugs, radiobiology, and immune-pharmacology. In this context, remarkable investigational fields are focused on the attempt to combine radiotherapy with chemo-immunological strategies and precision medicine protocols.

Radiotherapy prolongs the survival of advanced non-small-cell lung cancer patients undergone to an immune-modulating treatment with dose-fractioned cisplatin and metronomic etoposide and bevacizumab (mPEBev)

Radiotherapy (RT), together with a direct cytolytic effect on tumor tissue, also elicits systemic immunological events, which sometimes result in the regression of distant metastases (abscopal effect). We have shown the safety and anti-tumor activity of a novel metronomic chemotherapy (mCH) regimen with dose-fractioned cisplatin, oral etoposide and bevacizumab, a mAb against the vasculo-endothelial-growth-factor (mPEBev regimen), in metastatic non-small-cell-lung cancer (mNSCLC). This regimen, designed on the results of translational studies, showed immune-modulating effects that could trigger and empower the immunological effects associated with tumor irradiation. In order to assess this, we carried out a retrospective analysis in a subset of 69 consecutive patients who received the mPEBev regimen within the BEVA2007 trial. Forty-five of these patients, also received palliative RT of one or more metastatic sites. Statistical analysis (a Log-rank test) revealed a much longer median survival in the group of patients who received RT [mCH vs mCH + RT: 12.1 +/-2.5 (95%CI 3.35-8.6) vs 22.12 +/-4.3 (95%CI 11.9-26.087) months; P=0.015] with no difference in progression-free survival. In particular, their survival correlated with the mPEBev regimen ability to induce the percentage of activated dendritic cells (DCs) (CD3-CD11b+CD15-CD83+CD80+) [Fold to baseline value (FBV) ≤1 vs >1: 4+/-5.389 (95%CI,0- 14.56) vs 56+/-23.05 (95%CI,10.8-101.2) months; P:0.049)] and central-memory- T-cells (CD3+CD8+CD45RA-CCR7+) [FBV ≤ 1 vs >1: 8+/-5.96 (95%CI,0-19.68) vs 31+/-12.3 (95%CI,6.94-55.1) months; P:0.045]. These results suggest that tumor irradiation may prolong the survival of NSCLC patients undergone mPEBev regimen presumably by eliciting an immune-mediated effect and provide the rationale for further perspective clinical studies.

Anti-cancer activity of dose-fractioned mPE +/− bevacizumab regimen is paralleled by immune-modulation in advanced squamous NSLC patients

Background Results from the BEVA2007 trial, suggest that the metronomic chemotherapy regimen with dose-fractioned cisplatin and oral etoposide (mPE) +/- bevacizumab, a monoclonal antibody to the vascular endothelial growth factor (VEGF), shows anti-angiogenic and immunological effects and is a safe and active treatment for metastatic non-small cell lung cancer (mNSCLC) patients. We carried out a retrospective analysis aimed to evaluate the antitumor effects of this treatment in a subset of patients with squamous histology. Methods Retrospective analysis was carried out in a subset of 31 patients with squamous histology enrolled in the study between September 2007 and September 2015. All of the patients received chemotherapy with cisplatin (30 mg/sqm, days 1-3q21) and oral etoposide (50 mg, days 1-15q21) (mPE) and 14 of them also received bevacizumab 5 mg/kg on the day 3q21 (mPEBev regimen). Results This treatment showed a disease control rate of 71% with a mean progression free survival (PFS) and overall survival (OS) of 13.6 and 17 months respectively. After 4 treatment courses, 6 patients showing a remarkable tumor shrinkage, underwent to radical surgery, attaining a significant advantage in term of survival (P=0.048). Kaplan-Meier and log-rank test identified the longest survival in patients presenting low baseline levels in neutrophil-to-lymphocyte ratio (NLR) (P=0.05), interleukin (IL) 17A (P=0.036), regulatory-T-cells (Tregs) (P=0.020), and activated CD83+ dendritic cells (DCs) (P=0.03). Conclusions These results suggest that the mPE +/- bevacizumab regimen is feasible and should be tested in comparative trials in advanced squamous-NSCLC (sqNSCLC). Moreover, its immune-biological effects strongly suggest the investigation in sequential combinations with immune check-point inhibitors.

Abstract 2232: Immune-inflammatory markers predict the outcome of metastatic colorectal cancer patients treated with the thymidylate synthase poly-epitope peptide (TSPP) vaccine: results from a multi-arm TSPP/VAC phase Ib program:

Thymidylate synthase (TS) is a tumor-associated enzyme critical for DNA replication. TSPP is a poly-epitope-peptide vaccine to TS, which elicits a multi-epitopic CTL response with antitumor activity in preclinical models. TSPP has been tested in 50 advanced cancer patients enrolled in a multi-arm dose-finding TSPP/VAC1 phase Ib trial program (Eudract:# 2009-016897-33)(Table1) between May 2011 and January 2013. The trial results revealed that TSPP is safe and immune-biologically active, and provided preliminary evidence of a antitumor activity in pretreated mCRC patients (Cusi MG et al 2015 and Correale P et al 2015). This population of 41 patients presented a progression-free-survival and an overall-survival (OS) of 6.9 and 11.3 months, respectively, with a one-year survival rate of 32% (13 patients). We focused on mCRC patients as they represented the most relevant and homogeneous population in the trial. We performed Kaplan-Meier curves, log-rank tests and regression curves to correlate immunobiological findings and patients’ outcome. We found that their OS correlated with lower (under the median) ECOG scores (p:0.039), CEA levels (p:0.021), and serum levels of inflammatory markers (NLR, CRP, ESR, and LDH/LDHNR and ENA; p inferior 0.04) at baseline. Patients’ OS also correlated with greater (over the median) baseline levels of IL4 (p:0.028) and 17 (P:0.049), and with a post-treatment increase in anti-neutrophil-cytoplasm-antibodies/anti-proteinase-3 (Fold change to baseline values grater than 1; p:0.039). Activating K-ras mutations did not correlate with survival, however, inflammatory markers, cytokines, and autoantibodies lost their correlation with the survival in patients bearing these mutations. These results suggest that TSPP-antitumor activity in mCRC patients is affected by their baseline inflammatory/immunological status at baseline. Citation Format: Pierpaolo Correale, Cirino Botta, Elodia Claudia Martino, Valerio Nardone, Cristina Ulivieri, Claudia Gandolfo, Tatiana Cosima Baldari, Stefano Lazzi, Alessandro Ginori, Antonella Fioravanti, Giacomo Maria Guidelli, Luigi Pirtoli, Antonio Giordano, Pierfrancesco Tassone, Pierosandro Tagliaferri, Maria Grazia Cusi. Immune-inflammatory markers predict the outcome of metastatic colorectal cancer patients treated with the thymidylate synthase poly-epitope peptide (TSPP) vaccine: results from a multi-arm TSPP/VAC phase Ib program. [abstract]. In: Proceedings of the 107th Annual Meeting of the American Association for Cancer Research; 2016 Apr 16-20; New Orleans, LA. Philadelphia (PA): AACR; Cancer Res 2016;76(14 Suppl):Abstract nr 2232.

The role of delta radiomics in gastric cancer

We have read with great interest and appreciated the paper by Hou et al . entitled “Radiomic analysis using contrast-enhanced computed tomography (CT): predict treatment response to pulsed low dose rate radiotherapy in gastric carcinoma with abdominal cavity metastasis” (1).

3D bone texture analysis as a potential predictor of radiation-induced insufficiency fractures

Background The aim of our work is to assess the potential role of texture analysis (TA), applied to computed tomography (CT) simulation scans, in relation to the development of insufficiency fractures (IFs) in patients undergoing radiation therapy (RT) for pelvic malignancies. Methods We analyzed patients undergoing pelvic RT from Jan-2010 to Dec-2016, 31 of whom had developed IFs of the pelvis. We analyzed CT simulation scans using LifeX Software©, and in particular we selected three regions of interest (ROI): L5 body, the sacrum and both the femoral heads. The ROI were automatically contoured using the treatment planning software Raystation©. TA parameters included parameters from the gray-level histogram, indices from sphericity and from the matrix of GLCM (gray level co-occurrence matrix). The IFs patients were matched (1:1 ratio) with control patients who had not developed IFs, and were matched for age, sex, type of tumor, menopausal status, RT dose and use of chemotherapy. Univariate and multivariate analyses (logistic regression) were used for statistical analysis. Results Significant TA parameters on univariate analysis included both parameters from the histogram distribution, as well from the matrix of GLCM. On logistic regression analysis the significant parameters were L5-energy [P=0.033, odds ratio (OR): 1.997, 95% CI: 1.059-3.767] and FH-Skewness (P=0.014, OR: 2.338, 95% CI: 1.191-4.591), with a R2: 0.268. A ROC curve was generated from the binary logistic regression, and the AUC was 0.741 (95% CI: 0.627-0.855, P=0.001, S.E.: 0.058). Conclusions In our experience, 3D-bone CT TA can be used to stratify the risk of the patients to develop radiation-induced IFs. A prospective study will be conducted to validate these findings.

Systemic inflammatory status predict the outcome of k-RAS WT metastatic colorectal cancer patients receiving the thymidylate synthase poly-epitope-peptide anticancer vaccine

TSPP is an anticancer poly-epitope peptide vaccine to thymidylate synthase, recently investigated in the multi-arm phase Ib TSPP/VAC1 trial. TSPP vaccination induced immune-biological effects and showed antitumor activity in metastatic colorectal cancer (mCRC) patients and other malignancies. Progression-free and overall survival of 41 mCRC patients enrolled in the study correlated with baseline levels of CEA, immune-inflammatory markers (neutrophil/lymphocyte ratio, CRP, ESR, LDH, ENA), IL-4 and with post-treatment change in p-ANCA and CD56dimCD16brightNKs (p < 0.04). A subset of 19 patients with activating k-ras mutations showed a different immune-inflammatory response to TSPP as compared to patients with k-ras/wt and a worse outcome in term of PFS (p = 0.048). In patients with k-ras/mut, inflammatory markers lost their predictive value and their survival directly correlated with the baseline levels of IL17/A over the median value (p = 0.01). These results provide strong hints for the design of further clinical trials aimed to test TSPP vaccination in mCRC patients.

Is there a potential role for EGFR expression to lead margin reduction in glioblastoma

Eighty-three consecutive patients, with newly diagnosed, unifocal GB undergoing surgery and adjuvant RTTMZ from February 2010 to July 2014, were analyzed. The EGFR protein expression level was estimated by pathology examination of immunostained surgical samples according an expression classification score-based as previously published [2]. TTP and PR were evaluated in patients with disease progression at scheduled follow-up brain MRI scans. PRs were classified according to the MacDonald’s criteria, identifying central (C), in-field (I-F), marginal (M) or distant (D) recurrence. After a median follow-up time of 13 months (range 6–67 months), 66 patients (79.1%) showed MRI-detectable recurrences. Median TTP was 9 months after the completion of RT and concurrent TMZ. EGFR expression was classified into: High (H-EGFR) in 50 (60.4%) patients, and Low (L-EGFR) in 33 (39.6%). After clustering the modalities of recurrences (TTP an PR) according to the EGFR score groups, we found that LEGFR group had a median TTP of 13 months and a prevalence of C/I-F recurrences (accounting to a total 81%). H-EGFR group had a shorter median TTP (6 months) and a higher rate of M/D recurrences (55.6%), in a comparison with the L-EGFR category. EGFR expression is statistically correlated with TTP (log-rank test: p = 0.003) and PR (Fisher’s exact test: p = 0.01) (Fig. 1). After RT-TMZ treatment, in our case series, EGFR expression seems to be significantly correlated with TTP and PR. The immunostained method used for assessment of EGFR protein expression without a paired gene amplification analysis and lacking molecular sub-classification of GBs are probably major limits of this preliminary work. However, our results seem to suggest that EGFR expression might have a potential role for target contouring of RT To the Editor,