Search results for "Response"
showing 10 items of 4136 documents
Interassay and interobserver comparability study of four programmed death-ligand 1 (PD-L1) immunohistochemistry assays in triple-negative breast canc…
2021
Different immunohistochemical programmed death-ligand 1 (PD-L1) assays and scorings have been reported to yield variable results in triple-negative breast cancer (TNBC). We compared the analytical concordance and reproducibility of four clinically relevant PD-L1 assays assessing immune cell (IC) score, tumor proportion score (TPS), and combined positive score (CPS) in TNBC. Primary TNBC resection specimens (n = 104) were stained for PD-L1 using VENTANA SP142, VENTANA SP263, DAKO 22C3, and DAKO 28–8. PD-L1 expression was scored according to guidelines on virtual whole slide images by four trained readers. The mean PD-L1 positivity at IC-score ≥1% and CPS ≥1 ranged between 53% and 75% with th…
Identification of a genetic signature enriching for response to ibrutinib in relapsed/refractory follicular lymphoma in the DAWN phase 2 trial.
2021
Abstract Background The single‐arm DAWN trial (NCT01779791) of ibrutinib monotherapy in patients with relapsed/refractory follicular lymphoma (FL) showed an overall response rate (ORR) of 20.9% and a median response duration of 19.4 months. This biomarker analysis of the DAWN dataset sought to determine genetic classifiers for prediction of response to ibrutinib treatment. Methods Whole exome sequencing was performed on baseline tumor samples. Potential germline variants were excluded; a custom set of 1216 cancer‐related genes was examined. Responder‐ versus nonresponder‐associated variants were identified using Fisher's exact test. Classifiers with increasing numbers of genes were created …
Pertuzumab monotherapy after trastuzumab-based treatment and subsequent reintroduction of trastuzumab: activity and tolerability in patients with adv…
2012
Purpose The combination of pertuzumab and trastuzumab resulted in a clinical benefit rate (CBR) of 50% in patients with human epidermal growth factor receptor 2 (HER2) –positive breast cancer whose disease progressed during prior trastuzumab-based therapy. To define whether this previously observed encouraging activity was a result of the combination of pertuzumab and trastuzumab or of pertuzumab alone, we recruited a third cohort of patients who received pertuzumab without trastuzumab. We then investigated the impact of reintroducing trastuzumab to patients whose disease progressed on pertuzumab monotherapy. Patients and Methods Twenty-nine patients with HER2-positive breast cancer whose d…
Surrogate endpoints for overall survival in digestive oncology trials: which candidates? A questionnaires survey among clinicians and methodologists
2010
Abstract Background Overall survival (OS) is the gold standard for the demonstration of a clinical benefit in cancer trials. Replacement of OS by a surrogate endpoint allows to reduce trial duration. To date, few surrogate endpoints have been validated in digestive oncology. The aim of this study was to draw up an ordered list of potential surrogate endpoints for OS in digestive cancer trials, by way of a survey among clinicians and methodologists. Secondary objective was to obtain their opinion on surrogacy and quality of life (QoL). Methods In 2007 and 2008, self administered sequential questionnaires were sent to a panel of French clinicians and methodologists involved in the conduct of …
Assessment of treatment response in hepatocellular carcinoma: a review of the literature
2013
Hepatocellular carcinoma (HCC) has a high incidence all over the world. Even if the primary end point of treatment of HCC is survival, radiological response could be a surrogate end point of survival, and could have a key role in clinical management. Since 1950 several radiological response criteria have been applied; however, it was not until 2000 that specific criteria for HCC were introduced by the European Association for the Study of the Liver (EASL), and these were then standardized in 2010 with the development of the modified Response Evaluation Criteria for Solid Tumors (mRECIST) for HCC. The purpose of this brief review is to compare data in literature regarding the application an…
Durability of complete response after blinatumomab therapy for relapsed/refractory diffuse large B-cell lymphoma
2020
Despite advances in standards of care, the prognosis of relapsed/refractory (R/R) diffuse large B-cell lymphoma (DLBCL) remains poor. In these patients, 50–74% fail to respond to next line therapy,...
Role of Positron Emission Tomography for the Monitoring of Response to Therapy in Breast Cancer
2015
Abstract This review considers the potential utility of positron emission tomography (PET) tracers in the setting of response monitoring in breast cancer, with a special emphasis on glucose metabolic changes assessed with 18F-fluorodeoxyglucose (FDG). In the neoadjuvant setting of breast cancer, the metabolic response can predict the final complete pathologic response after the first cycles of chemotherapy. Because tumor metabolic behavior highly depends on cancer subtype, studies are ongoing to define the optimal metabolic criteria of tumor response in each subtype. The recent multicentric randomized AVATAXHER trial has suggested, in the human epidermal growth factor 2-positive subtype, a …
Durability of complete response after blinatumomab therapy for refractory/relapsed aggressive B-cell non-Hodgkin lymphoma.
2019
e19041 Background: Achieving durable response in patients (pts) with relapsed/refractory (R/R) aggressive B-cell lymphoma (B-NHL) is challenging. Blinatumomab, a bispecific T-cell engager (BiTE) immunotherapy targeting CD19-expressing cancer cells, has shown promising efficacy in pts with R/R aggressive B-NHL. We report the durability of complete response (DOCR) in pts treated with blinatumomab. Methods: The DOCR in pts with R/R aggressive B-NHL responding to blinatumomab was assessed using data from two phase 2 studies (study 1 [N = 25], NCT01741792; study 2 [N = 41], NCT02910063) in pts with R/R aggressive B-NHL. CR was assessed using Cheson (study 1) and Lugano (study 2) criteria. Time-…
Circulating tumor DNA to detect minimal residual disease, response to adjuvant therapy, and identify patients at high risk of recurrence in patients …
2020
4009 Background: The clinical utility of tracking circulating tumor DNA (ctDNA) as a non-invasive biomarker for detecting minimal residual disease (MRD) and stratifying patients based on their risk of developing relapse has been well established in colorectal cancer (CRC). This study evaluates the detection and longitudinal monitoring of ctDNA in CRC patients pre- and post-operatively, during and after adjuvant chemotherapy (ACT). Methods: The prospective, multicenter cohort study recruited patients (n = 193) diagnosed with resected stage I-III CRC. Plasma samples (n = 1052) were collected at various timepoints with a median follow up of 21.6 months (4.6-38.5 months). Individual tumors and…
LGG-59. REMARKABLE OBJECTIVE RESPONSE AND FAVORABLE SURVIVAL FOR BRAF-V600E CHILDHOOD LOW-GRADE GLIOMAS TO BRAF INHIBITORS COMPARED CONVENTIONAL CHEM…
2018
Activation of the MAPK pathway represents a hallmark of pediatric low-grade glioma (pLGG) and is frequently caused by BRAF alterations. BRAF-V600E represent an aggressive type of pLGG with less than optimal response to conventional chemo-radiation approaches. While clinical trials using BRAF-V600E inhibitors are ongoing, these data are not yet available. We have assembled an international cohort of BRAF-V600E glioma patients treated off-label with BRAF inhibitors as a monotherapy. Complete molecular, clinical and imaging data is being collected and compared to previous chemo-radiation therapies. Ongoing data form the taskforce on 40 BRAF-V600E gliomas from 25 international institutions is s…