TIGIT in Patients With Chronic Myeloid Leukemia

March 25, 2021 updated by: Ola Abdelkarem Hasan, Assiut University

Expression of TIGIT in NK Cells in Patients With Chronic Myeloid Leukemia

To expresse TIGIT in NK Cells in Patients with Chronic Myeloid Leukemia

Study Overview

Status

Unknown

Conditions

Intervention / Treatment

Detailed Description

Chronic myeloid leukemia (CML) is also known as chronic myelogenous leukemia. It's a type of cancer that starts in certain blood-forming cells of the bone marrow.

In CML, a genetic change takes place in an early (immature) version of myeloid cells that make red blood cells, platelets, and most types of white blood cells (except lymphocytes). This change forms an abnormal gene called BCR-ABL, which turns the cell into a CML cell. The leukemia cells grow and divide, building up in the bone marrow and spilling over into the blood. In time, the cells can also settle in other parts of the body, including the spleen. CML is a fairly slow growing leukemia, but it can change into a fast-growing acute leukemia that's hard to treat.

CML occurs mostly in adults, but very rarely it occurs in children, too. In general, their treatment is the same as for adults.

Chronic myeloid leukemia (CML) is characterized by the expression of the BCR/ABL1 fusion gene and the presence of the Philadelphia chromosome (Ph). The product of this fusion gene is a protein with deregulated tyrosine kinase activity, resulting in a malignant clonal disorder of the hematopoietic stem cells in the bone marrow (BM) and the accumulation of immature myeloid cells in peripheral blood (PB).

The use of tyrosine kinase inhibitors (TKIs) leads to a complete remission rate reaching 83%; however, mutation in the ABL kinase domain results in certain treatment failure. Furthermore, long-lasting side effects of treatment and the cost of TKIs remain a problem Therefore, the development of new TKI agents and combination therapies is urgently needed for CML patients .

Natural killer (NK) cells serve an important role in eliminating malignant cells. The cytotoxic effects of NK cells were first identified against leukemia cells, and it is now hypothesized that they may have a critical role in leukemia therapy.

The cellular functions of NK cells are mediated by their cell surface receptors, which recognize ligands on cancer cells. The role of NK cells is specifically regulated by the activating or inhibitory killer cell immunoglobulin like receptors (KIRs) on their surface, which bind to the human leukocyte antigen (HLA) class I ligands present on the target cells.

There is an abundance of evidence that NK cells can exhibit potent antitumor activity against CML, However, disease-associated mechanisms often inhibit the proper functions of endogenous NK cells, leading to inadequate tumor control and risk for disease progression.

As it is well known, the function of NK cells is precisely regulated by inhibitory and activating receptors.

Recently, T cell immunoreceptor with immunoglobulin and immunoreceptor tyrosine -based inhibitory motif (ITIM domain) (TIGIT) has been identified as a novel NK inhibitory receptor that can lead to NK cell exhaustion and dysfunction.

Targeting TIGIT is believed to restore 4 key function :Restoration of NK function, Depletion of T reg, Increase antigen-specific CD8 memory response and Induction of new antigen-specific CD8 T cells.

TIGIT was first identified as an inhibitory receptor expressed by activated CD4 Tcells , tregs and NK cells. However , direct evidence supporting a clinical role for TIGIT in AML.

Study Type

Observational

Enrollment (Anticipated)

65

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

the participants will be divided into 2 groups , 40 CML patients and 25 healthy individuals .

Description

Inclusion Criteria:

  • CML patients
  • Healthy individuals

Exclusion Criteria:

  • Patients who have current or recent acute infection
  • Patients who have autoimmune disease
  • Patients who have diabetes mellitus disease

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Healthy individuals
Diagnostic test: flow cytometry test
Blood samples will be stained with TIGIT by flow cytometry test
chronic myeloid leukemia patients
Diagnostic test: flow cytometry test
Blood samples will be stained with TIGIT by flow cytometry test

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
TIGIT expression frequency on NK cells
Time Frame: 18 month
In this study, we will assay the TIGIT expression frequency on NK cells in the peripheral blood of CML patients
18 month

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Assiut University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Anticipated)

April 1, 2021

Primary Completion (Anticipated)

April 1, 2022

Study Completion (Anticipated)

December 1, 2022

Study Registration Dates

First Submitted

March 24, 2021

First Submitted That Met QC Criteria

March 24, 2021

First Posted (Actual)

March 26, 2021

Study Record Updates

Last Update Posted (Actual)

March 29, 2021

Last Update Submitted That Met QC Criteria

March 25, 2021

Last Verified

March 1, 2021

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • chronic myeloid leukemia

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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