Analysis of Transcriptomic Profile of Graft-versus-host Disease (GHVD) After Allogeneic Grafting of Hematopoietic Stem Cells

Study Overview
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Brief Summary
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Graft-versus-host disease (GVHD) is a frequent and severe complication of hematopoietic stem cell transplantation (HSC), and is responsible for significant early mortality despite prophylactic strategies developed in recent decades, Especially since it is resistant to first-line treatment. The present diagnosis is difficult, non-specific and is based on the combination of an evocative clinical context (CSH allograft, time to appearance before J100, characteristic clinical manifestations), suggestive anatomo-pathological analysis (predominantly inflammatory infiltrate Lymphocyte, mucosal edema and presence of apoptotic bodies), and the exclusion of any differential diagnosis (in particular serology / negative viral PCR). However, to date there is no molecular characterization of this manifestation, and therefore no specific treatment. The nCounter® nanostring technology allows the rapid and simple analysis of the simultaneous expression of a group of genes (up to 800 on the same sample), from a very small amount of RNA, and from samples with difficulty Such as fabrics already fixed to formaldehyde and included in paraffin. It allows the detection of a molecular signature of the tissue analyzed. No transcriptomic analysis has ever been performed on human tissues with GVHD.

Official Title
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Analysis of Transcriptomic Profile of Graft-versus-host Disease (GHVD) After Allogeneic Grafting of Hematopoietic Stem Cells

Conditions
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Graft Vs Host Disease, Hematopoietic Stem Cells

Intervention / Treatment
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* Other: Transcriptomic analysis of GVHD biopsies


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Person aged ≥ 18 years Patients who have received an HSC allograft since June 2012 Having presented a suspicion of cutaneous or digestive GVHD before J100 post-allograft Of which the diagnosis was retained by the combination of clinical and histological criteria Or whose diagnosis has been reversed by histological analysis, for the reactive / inflammatory biopsies that serve as control The diagnosis of which was made between 01/01/2013 and 31/12/2015 Survived at least 1 month to monitor clinical progress Exclusion Criteria: Whose biopsy specimens were also the sites of a viral reactivation (EBV, CMV, HHV) that could mimic a GVHD Having survived less than 1 month after the diagnosis of GVHD

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Intervention/Treatment |
| --- |
|Other: Transcriptomic analysis of GVHD biopsies|The transcriptomic analysis of GVHD biopsies aims at: to demonstrate an evocative or even specific molecular profile, making the diagnosis of GVHD easier to identify new intracellular signaling pathways that could lead to new therapeutic|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Transcriptomic profile by analysis of the expression of the mRNAs of a determined panel of 800 genes regulating the immune response |  | 3 months |