Functional Plasticity of Human IL-17-producing CD8+ T Cells

Human Tc17 cells (IL-17-producing CD8+ T cells) have been found to contribute to different kinds of human inflammatory and malignant diseases. Previous studies indicate that Tc17 cells can convert to Tc1 cells (IFN-γ-producing CD8+ T cells) in tumor bearing mice to exert anti-tumor effect. Base on these results in murine models, human Tc17 may have potential in developing cancer immunotherapy. However, there is limited evidence to reveal the characteristics and functional plasticity of human Tc17 cells. In this proposal, we aim to optimize the differentiation of Tc17 cells and then investigate whether the reprograming of Tc17 to Tc1 cells can promote the anti-tumor cytotoxicity. Preliminarily, we isolated CD8+ T cells from the peripheral blood mononuclear cells of healthy donors to induce Tc17 differentiation. Human CD8+ T cells were stimulated with anti-CD3/anti-CD28 antibodies, TGF-β, IL-1β, IL-6, IL-23, IL-2, anti-IFN-γ, and anti-IL-4 antibodies. After 10 days in culture, there were 4% of IL-17A+IFN-γ- and 7% of IL-17A+IFN-γ+ CD8+ T cells. However, IFN-γ+ CD8+ T cells still represented high percentage, although it's significantly lower than that in Tc1 cells. Our preliminary study demonstrated that Tc17 cells expressed lower levels of cytotoxic molecules than Tc1 cells. We will further test if the expressions of cytotoxic molecules, including perforin and granzyme B, and EOMES will be enhanced by various cytokines. Ultimately, we will evaluate the functional plasticity of Tc17 cells under various cytokine stimulation. Collectively, success of this project will establish more insight for human Tc17 cells and provide the information for future developing human CD8+ T cell-mediate immunotherapy.

Study Overview

• Status: Completed
• Conditions: IL-17+ CD8 T Cells in Cancer Patients

• Study Type: Observational
• Enrollment (Actual): 17

Contacts and Locations

Study Locations

• Taiwan
  • Taichung, Taiwan, 404
    • China Medical University Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 20 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Non-Probability Sample

Study Population

10 healthy donors and 20 cancer patients

Description

Inclusion Criteria:

• cancer patients

Exclusion Criteria:

• pregnancy

Study Plan

How is the study designed?

Design Details

• Observational Models: Case-Only
• Time Perspectives: Prospective

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Functional plasticity of IL-17+ CD8 T cells	To skew human IL-17+ CD8 T cells and add specific cytokines to convert IL-17 CD8 T cells to IFN-gamma CD8 T cells	culture cells for 16 days

Collaborators and Investigators

• Sponsor: China Medical University Hospital

Study record dates

Study Major Dates

• Study Start (Actual): January 25, 2018
• Primary Completion (Actual): January 25, 2018
• Study Completion (Actual): August 30, 2018

Study Registration Dates

• First Submitted: September 20, 2017
• First Submitted That Met QC Criteria: September 20, 2017
• First Posted (Actual): September 25, 2017

Study Record Updates

• Last Update Posted (Actual): July 29, 2021
• Last Update Submitted That Met QC Criteria: July 27, 2021
• Last Verified: July 1, 2021

More Information

Terms related to this study

• Other Study ID Numbers: CMUH106-REC3-107

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No