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Colorectal Cancer Immunomonitoring Combined With Radiofrequency ablatIon

ABSTRACT: The primary objective of the study aims to compare soluble CD154 (CD40L) levels before and after radiofrequency ablation (RFA) in patients with colorectal cancer (CRC) liver metastases. The secondary objectives aims: * to compare soluble CD154 (sCD40-L) levels before and after treatment by RFA or surgery alone in patients with CRC liver metastases; * to study the feasibility and reliability of soluble CD154 (sCD40-L) levels to detect and quantify the induction of immun response in CRC liver metastases patients after RFA; * to study the impact of surgery on plasma soluble CD154 levels; * to study association between CD154 expression level before and after RFA in CRC liver metastases patients and relapses rate at 1 year.

DISEASE(S): Radiofrequency Ablation,Colorectal Cancer,Colorectal Neoplasms

PROVIDER: 2341660 | ecrin-mdr-crc |

REPOSITORIES: ECRIN MDR

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Project description:Background & Aims: The metastatic process is complex and remains a major obstacle in the management of colorectal cancer (CRC). To gain a better insight into the biologic events driving the metastatic process we investigated genomic aberrations in a large cohort of matched CRC primaries and distant metastases from various sites. Methods: In total, 62 primary colorectal cancers, 62 matched normal specimens, and 68 matched metastases (from liver, lung, ovary, omentum, and distant lymph nodes) were analyzed by high resolution array comparative genomic hybridization (array CGH) for DNA copy number changes. Findings were validated using a publicly available dataset consisting of 21 primary tumors and matched liver metastases. Fluorescence in situ hybridization (FISH) was used to confirm some of the DNA copy number changes observed. Results: Overall patterns of DNA copy number aberrations were highly similar between primary tumors and their metastases, confirming clonality. Additional copy number aberrations in metastasis are rare and rather than recurrent they were sporadic for individual patients. The only recurrent differences between primary tumors and their metastases were two chromosomal regions, 6q21 and 8q24.21 encompassing the MYC oncogene, that coamplified in three metastases of two patients (3.2%). FISH analysis confirmed the high level co-amplification in the metastasis, which were not detected in their primary tumors. Conclusions: Primary CRC and their metastases show highly similar patterns of DNA copy number changes, additional copy number aberrations in metastasis are rare and recurrences exceptional. These observations are consistent with the hypothesis that the metastatic potential is predestined early in the development of the primary tumor. In total, 62 primary colorectal cancers, 62 matched normal specimens, and 68 matched metastases (liver, lung, ovarian, omentum and distant lymph nodes) were analyzed by high resolution array comparative genomic hybridization (array CGH).

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Colorectal Cancer Immunomonitoring Combined With Radiofrequency ablatIon

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