View clinical trials related to Hematopoietic Stem Cells.
Filter by: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.
Aim of the study: Evaluation of feasibility, safety and potential effects of stem cells on chronic wounds using a pressure sore model. Clinical relevance: - Accelerated healing of uncomplicated wounds - Enhanced healing of complicated (chronic, non-healing) wounds Study design: - Prospective controlled phase I/II study - Cohort of 5 patients in pilot study, then reevaluation Patients: - Para- and tetraplegic patients with sacral pressure sores grade III-IVA according to the classification of Daniel and Seiler Methods: 1. First surgical intervention: - Radical debridement of pressure sore - Bone marrow harvest from the iliac crest - Isolation of hematopoietic stem cells, aiming to gain > 1 mio. CD 34+ cells per patient under GMP conditions 3. Stem cell therapy (after 2 days) - Injection of stem cells in suspension (50'000 CD 34+ cells in 100 microliter saline per cm2 of wound surface) on one half of the total wound surface and cell-free saline on the other half as a control 4. Second surgical intervention (after 3-4 weeks): - Complete excision of the wound - Closure of the defect by fasciocutaneous flap 5. Evaluation of wound healing: - Clinical - 3D laser imaging - Histology - Growth factor assay