Prognostic Value of the Lymphocytic Infiltrate in Colon Cancers

Not Applicable

Completed

• Conditions: Colorectal Cancer
• Interventions: Procedure: Colorectal surgery (resection); Biological: Blood sampling

• Registration Number: NCT02557061
• Lead Sponsor: University Hospital, Rouen

Brief Summary

Colorectal cancer (CRC) is one of the most common cancers in France (36,000 new cases / year) and nearly 16,000 people die each year from this disease. The lymph node involvement of the surgical specimen is today the main tool on which is based the adjuvant treatment decision after curative surgical resection. The study of new predictive factors to identify patients at risk for developing a local or metastatic recurrence is therefore a major challenge.

It is now clear that the immune system plays a role in the control of tumor's development, and it was shown that there was a correlation between the presence of a CD3+ T-lymphocyte infiltrate in colorectal cancers and patient survival. Preliminary studies suggest an important role of regulatory T-lymphocyte in the modulation of the antitumor immune response. The aim of our study is to follow a cohort of patients operated for colon cancer with curative intent to highlight the prognostic characteristics of the tumoral infiltrate by various lymphocyte populations (particularly T-lymphocytes but also B-lymphocytes and regulatory lymphocytes). It will be performed a preoperative analysis of blood circulating lymphocytes with antibodies specific for different cell populations (CD3, CD4, CD8, CD56, CD16, CD19, CD2) and stage of activation (CD25, CD69, HLA-DR ) or differentiation (CD24, CD38, CD27, CD103, CD62L, CCR7, CD45RA / RO, IgD). The presence of regulatory T-lymphocytes will also be analyzed. It will be performed on tumor sample a Tissue Microarrays for immunohistochemical study to determine the presence of different lymphocyte populations. We systematically study the markers CD68 (monocytes / macrophages), CD56 (NK cells), CD20 and CD79a (B cells / plasma cells), CD3 (T cells), CD8 (cytotoxic T), CD4 (helper T) FoxP3 (regulatory T), cytotoxicity of CD8 markers (Fas ligand, perforin and granzyme) and MHC I (antigen presentation) to explore the innate and adaptive immune responses. For each section, the different zones will be analyzed (center and invasive margin and healthy tissue). The main objective of the study is the influence of the tumor infiltration rate by CD3 + T cells on disease free survival at 2-years in patients with non-metastatic colon cancer resection. The secondary objective is to search a correlation between the rate of T-lymphocytes on preoperative blood sample and on tumor sample.

Detailed Description

Not available

Study Timeline

• Study Start: 2009-04
• Study First Submitted: 2015-09-21
• Study First Submitted QC: 2015-09-21
• Study First Posted: 2015-09-22
• Primary Completion: 2016-08
• Study Completion: 2016-08
• Status Verified: 2016-10
• Last Update Submitted: 2016-10-07
• Last Update Posted: 2016-10-10

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 56

Inclusion Criteria

• Patient is male or female, and > 18 years of age
• Patients with nonmetastatic colon cancer histologically proven (stage I, II or III).
• Patients with curative resection (R0).
• Patient has agreed to participate by giving written informed consent
• Patient affiliated to the social security system

Exclusion Criteria

• Pregnant or without effective contraception and reproductive age.
• Patients with synchronous metastatic disease at preoperative assessment (including at least an abdominal ultrasound and chest X-ray (or thoraco-abdominopelvic CT).
• Patient taking immunosuppressive therapy.
• Patient with lymphoid hematological disease.
• Patients with rectal cancer defined by tumor accessible to finger and requiring preoperative radiotherapy (except tumor of upper rectum or rectosigmoid or rectal tumor operated without preoperative radiotherapy)
• Patient under guardianship.
• Patient misunderstanding spoken and written French.
• Patient unable to submit to monitoring study for geographical, social or psychological reasons.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Patient with colorectal cancer	Colorectal surgery (resection)	Colorectal surgery (resection) and blood sampling are done for patient with colorectal cancer
Patient with colorectal cancer	Blood sampling	Colorectal surgery (resection) and blood sampling are done for patient with colorectal cancer

Primary Outcome Measures

Name	Time	Method
Number of patients with tumor infiltrate by T-lymphocytes (CD3+)	Day 1
Number of alive patients	2 years

Secondary Outcome Measures

Name	Time	Method
Rate of preoperative blood T-lymphocytes	day 1 before resection

Trial Locations

Locations (1)

Rouen University Hospital; 🇫🇷 Rouen, France