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Resorbable Barrier for the Prevention of Abdominal and Peri-hepatic Adhesion Formation

ABSTRACT: The purpose of this study is to evaluate the efficiency of a resorbable barrier membrane for the prevention of abdominal and peri-hepatic adhesion in patients with colorectal cancer requiring two-stage surgery for the resection of hepatic metastases. Eligible patients will be randomly assigned to one of 2 arms: * Seprafilm group (receiving resorbable barrier membrane during the first surgery) * No-treatment control group (without seprafilm barrier during the first surgery) The primary objective is to establish, in patients with colorectal cancer requiring two-stage surgery for the resection of hepatic metastases, the efficiency of a resorbable barrier membrane (Seprafilm) for limiting abdominal and peri-hepatic adhesion during the second operation. This study is a prospective multicentric phase II, controlled, randomized and non comparative trial. A total of 60 patients will be enrolled: 45 will receive Seprafilm whereas 15 will be assigned to the no-treatment control group. The inclusion period should be approximately 18 months. The follow up period after the second surgery will be 3 years.

DISEASE(S): Colorectal Cancer,Colorectal Neoplasms,Tissue Adhesions

PROVIDER: 2099716 | ecrin-mdr-crc |

REPOSITORIES: ECRIN MDR

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Project description:Introduction: Peri-operative window trials, using molecular biomarkers as surrogate endpoints for treatment response, offer investigators a uniqueopportunity to obtain intact tumor samples at 2 different time-points and thus evaluate potential biomarkers over a short period of time. Here we report results of a pilot trial designed to determine if treatment-mediated changes in gene expression can be detected after a 10-day exposure to anastrozole in estrogen receptor (ER)-positive breast cancer compared to untreated controls. Methods: Paired tumor samples (biopsy and surgical) were obtained from 26 postmenopausal women with ER-positive breast cancer. Patients were assigned anastrozole (1mg/dy) for 10 days immediately prior to surgery (13 cases) or no treatment (13 controls). 502 cancer-related genes were examined by the DASL FFPE-based cDNA array (moderated t-test, p ≤ .005). Surrogate biomarkers reflecting changes in gene expression were examined by immunohistochemistry (IHC) (Wilcoxon rank-based test, p < .05). Results: Sufficient RNA was available from 19 paired samples (8 controls, 11 cases). There was no difference in age, tumor size, grade, or baseline biomarker expression between groups. Within each group, 18 genes, reflecting roles in proliferation, angiogenesis, and apoptosis showed differential expression over time from biopsy to surgery (p < 0.005). Dysregulation of estrogen-related genes was present only in the treated group. Comparison between groups identified 5 genes that were significantly dysregulated between controls and treated cases (BAG1/ING1/ERBB4/IFNGR1/TFDP1). Reduction in Ki-67 index was observed in 7 (54%) treated cases in 1 (7.7%) control patient. Conclusions: Short-term (10-day) exposure to anastrozole resulted in significant dysregulation of 18 out of 502 cancer-related genes, and Ki-67 was reduced in 54% of cases. However, the local effects of wound healing may represent a confounding factor in the interpretation of peri-operative window trials as exposed by the changes in gene expression and the increased Ki-67 index in the control group. Prospective, paired tumor samples (biopsy and surgical) were obtained from 26 postmenopausal women with ER-positive breast cancer. Patients were assigned anastrozole (1mg/dy) for 10 days immediately prior to surgery (13 cases) or no treatment (13 controls). 502 cancer-related genes were examined by the DASL FFPE-based cDNA array. Sufficient RNA for gene expression analysis was obtained from 19/26 (73%) FFPE paired (biopsy and surgery) samples (8 controls, 11 anastrozole-treated patients

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Resorbable Barrier for the Prevention of Abdominal and Peri-hepatic Adhesion Formation

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