Immune Monitoring After Allogeneic Hematopoietic Stem Cell Transplantation
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|ClinicalTrials.gov Identifier: NCT03233659|
Recruitment Status : Recruiting
First Posted : July 28, 2017
Last Update Posted : July 28, 2017
Graft versus Host disease ( GVHD) is one of the major complications of Allogeneic Stem Cell Transplantation. Acute GVHD develops early ( within 2to 3 months) after transplantation and is the leading cause of death of transplanted patients. The pathogenesis of Chronic GVHD is still little known. Chronic GVHD is caused by donor T lymphocytes, but we have no precise knowledge on the participation of specific subsets of immune system cells to chronic GVHD. In general, chronic GVHD is associated with an increase in the number of T effector lymphocytes, both helper type 2 and cytotoxic.
Recently, also antigen presenting cells (APCs) have been implicated in pathogenesis of chronic GVHD in studies performed on animal models. T lymphocyte responses that characterize chronic GVHD require that recipient antigens are submitted by APCs which originate from the donor's HSC ( Hematopoietic Stem Cells) APCs are heterogeneous population that includes dendritic cells (DCs) ,monocytes, activated B lymphocytes and CD34+ cell subpopulations. These cells can be identified by cytometry.
The data about APCs role in chronic GVHD are preliminary and often discordant. Seemingly, there isn't correlation between circulating APCs number and risk of cGVHD. However, recent data of our group show that patients with cGVHD could have higher number of monocytes in bone marrow than transplanted patients without cGVHD.
The aim of study is to measure the number of circulating immune cells in the PB (peripherical blood) before and after Allogeneic Hematopoietic Stem Cell Transplantation by flow cytometry.
|Condition or disease|
|Allogeneic Stem Cell Transplantation GVHD|
Show Detailed Description
|Study Type :||Observational|
|Estimated Enrollment :||300 participants|
|Official Title:||Study of the Function of Immune System in Patients Undergoing Allogeneic Stem Cell Transplantation|
|Actual Study Start Date :||August 12, 2014|
|Estimated Primary Completion Date :||June 2018|
|Estimated Study Completion Date :||June 2018|
All patients undergoing Allogeneic Stem Cell Transplantation are enrolled in the study.
- The primary endpoint of study is detection of circulating cells by flow cytometry before and after Allogeneic Stem Cell Transplantation [ Time Frame: Patient's PB samples are harvested : on entering the department;1 month after transplantation ; 3, 6, 9,12 months after transplantation ]We analyze the following cells:Myeloid Dendritic Cells, Plasmacytoid Dendritic cells, CD16+ Dendritic cells, CD14+ monocytes, CD14+/CD16+ monocytes, total T lymphocytes, total T helper lymphocytes, central memory, naive, effector memory and effector T helper lymphocytes, total cytotoxic lymphocytes, central memory, naive, effector memory and effector cytotoxic lymphocytes, CD16+/CD56+ NK cells, B lymphocytes, T regulatory lymphocytes.
Biospecimen Retention: Samples With DNA
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03233659
|Contact: Mario Arpinati, MD||+39 051 214 firstname.lastname@example.org|
|Contact: Francesca Ulbaremail@example.com|
|Principal Investigator:||Mario Arpinati, MD||St. Orsola-Malpighi University Hospital Bologna, Italy|