View clinical trials related to Hematopoietic Stem Cells.
Filter by:Hematopoietic stem cell transplantation (HSCT) is a cellular therapy aiming at curing some hematological diseases. Upon transplantation, recipients experience a phase of profound immune suppression with loss of protective immunity against most infectious agents. Revaccination of HSCT recipients against vaccine-preventable infections is an important post-transplant intervention for reducing morbi-mortality. The VaccHemInf project aims at assessing the efficacy of recommended vaccines in adult recipients of HSCT, through the antibody titers reference method and a panel of immune functional assays.
The purpose of this study is to evaluate the efficacy of vedolizumab when added to background aGvHD prophylaxis regimen compared to placebo and background aGvHD prophylaxis regimen on intestinal aGvHD-free survival by Day +180 in participants who receive allo-HSCT as treatment for a hematologic malignancy or myeloproliferative disorder.
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.
This is a pilot study to evaluate the efficacy of hyperbaric oxygen therapy (HBO2) for mobilizing hematopoietic progenitor cells from bone marrow to blood. These cells are needed for patients to undergo bone marrow transplantation and some patients fail to respond to current best chemotherapy. HBO2 has been shown to trigger stem cell mobilization in other patient populations and we plan to investigate whether this intervention can act in concert with chemotherapeutic agents to allow poor mobilizer patients to achieve successful bone marrow transplantation. Twenty patients will be identified by participating hematologists who have failed to respond adequately to chemotherapy. When it is deemed appropriate to attempt an additional stem cell mobilization protocol, these patients will be administered chemotherapy as determined by their primary treating hematologist and additionally receive daily HBO2 (2.5 atmospheres absolute [ATA] for 90 minutes) for 3-8 days. At intervals, blood samples will be obtained as is the normal transplantation protocol practice to assess whether adequate stem cells are present in blood for the patient to proceed with transplantation. The project is anticipated to take one year to complete.
This research study is evaluating a drug called meloxicam to see if it provides a benefit to people receiving Autologous Hematopoietic Stem Cell Transplantation (AHSCT). The participant is currently scheduled to receive an AHSCT, which is a procedure that removes blood-forming stem cells (cells from which all blood cells develop) from the body. These stem cells are stored and later given back to the participant by a process called apheresis. This is a standard procedure to treat certain blood diseases such as lymphoma and multiple myeloma. However the use of meloxicam with this procedure is considered investigational. Meloxicam is a non-steroidal anti-inflammatory drug (NSAID) which is given to decrease fever, swelling and pain that may come with inflammation. It has been approved by the FDA for the treatment of arthritis however it has not been approved for use in people receiving AHSCT. This study will compare the combination of meloxicam with a drug called G-CSF (also called neupogen), to the combination of G-CSF with an agent that has no medicine (placebo). G-CSF is a substance that causes blood stem cells to change or increase in number when given to people undergoing AHSCT. The researchers would like to learn if giving meloxicam in combination with G-CSF to people before they undergo AHSCT will increase the number of stem cells available in the blood to collect and make the collection process easier.
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