Impact of HLA-E Overexpression by Tumor Cells on the Biology of TIL in Colorectal Cancer

NCT02980146 | Completed

• 1 other identifier: RC16_0212
• Study Type: observational
• Target: 28
• Locations: 1 country
• Sites: 1

Brief Summary

Accumulating evidences suggest that colorectal cancer (CRC) progression is not solely determined by the genetic abnormalities of the tumor cells but also by the host response. Indeed, recent studies in CRC have associated improved survival with a high number of tumor-infiltrating (TIL) memory and cytotoxic T lymphocytes, suggesting a link between tumor progression and in situ T cell response. Gene expression profiling studies have clearly isolated a well-known subgroup of CRC characterized by microsatellite instability (MSI) CRC, associated with a strong immune response signature involving both Th1/cytotoxic and immune evasion pathways. Moreover, the investigators have previously shown that HLA-E/β2m is overexpressed by tumor cells in roughly 20% of CRC and is associated with a worse prognosis, most likely due to NK and T effector cell functions upon engagement with the inhibitory NK receptor CD94/NKG2A. However, our recent results on an enlarger cohort of patients suggest that if this observation holds true for MSS CRC, HLA-E over-expression is inversely associated with a good prognosis in MSI CRC. Thus, the phenotype and function of TIL, depending on the MSI/MSS status of CRC have to be precised. The investigators hypothesized that in MSI CRC, known to express a high number of MSI-H related frameshift peptides which represent a pool of tumor specific antigens, HLA-E could present peptides to TCR of non conventional CD8+ HLA-E-restricted alpha-betaT cells (also expressing CD94), then inducing a strong antitumor cytolytic activity. Therefore, the aim of this project is to determine the exact phenotype, function and specificity of the CD94+ TIL in CRC, depending on both the HLA-E and the MSI/MSS status of tumor cells. These results could impact the clinical practice as anti-NKG2A monoclonal antibodies or frameshift peptide based immunotherapy that could be promising new therapeutic options in CRC patients.

Conditions

ColoRectal Cancer

Outcome Measures

Primary Outcomes (1)

• The phenotype of TIL will be precised by immunohistochemisry and flow cytometry using various combinations of monoclonal antibodies to identify different subset of TIL and their frequency, especially those expressing NKG2A or NKG2C chain.

  Until 5 years

Study Arms (1)

Group "patients with colorectal cancer"

Major patients treated surgically for colorectal cancer at Nantes University Hospital or at the Institut de Cancerologie de l'Ouest and agreeing to participate in the study

Other: Non interventional study

Interventions

Non interventional study OTHER

Group "patients with colorectal cancer"

Eligibility Criteria

• Age: 18 Years - 85 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Major patients treated surgically for colorectal cancer at the Nantes University Hospital or the West Institute of Cancerology

You may qualify if:

• Major patients treated surgically for colorectal cancer at the Nantes University Hospital or the West Institute of Cancerology
• Patients agreeing to participate in the study
• Age\> 85 years
• Neoadjuvant or immunosuppressive therapy for other pathology
• Size of the tumor insufficient to carry out all the samples dedicated to the research without constraining the diagnostic step (tumoral sampling at least equal to 1 cm3)

Sponsors & Collaborators

• Nantes University Hospital: lead
• U892 INSERM Team 3: collaborator

Study Sites (1)

Nantes University Hospital

Nantes, 44093, France

Location

Biospecimen

Retention: SAMPLES WITHOUT DNA

20 mL of Blood, a tumor fragment and a fragment of colonic mucosa

MeSH Terms

Conditions

Colorectal Neoplasms

Condition Hierarchy (Ancestors)

Intestinal Neoplasms; Gastrointestinal Neoplasms; Digestive System Neoplasms; Neoplasms by Site; Neoplasms; Digestive System Diseases; Gastrointestinal Diseases; Colonic Diseases; Intestinal Diseases; Rectal Diseases

Study Officials

• Céline BOSSARD, Pr

  Nantes University Hospital

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: November 21, 2016
• First Posted: December 2, 2016
• Study Start: June 1, 2016
• Primary Completion: June 26, 2017
• Study Completion: June 26, 2017
• Last Updated: April 18, 2019

Record last verified: 2019-04

Data Sharing

• IPD Sharing: Will not share

Locations

FR (1)