Aplastic Anemia Clinical Trial
Official title:
Phase II Study of Umbilical Cord/Placenta-Derived Mesenchymal Stem Cells to Treat SAA
The purpose of this study is to evaluate the safety and efficacy of mesenchymal stem cells (MSCs) derived from human umbilical cord/placenta at a dose of 1.0E+6 MSC/kg in subject for the therapy of severe aplastic anemia (SAA).
Severe aplastic anemia (SAA) is a condition that involves a low level of red blood cells,
white blood cells, and platelets without evidence of another bone marrow disease. Patients
with severe aplastic anemia produce too few blood cells, causing fatigue, easy bruising and
bleeding, and susceptibility to infections. In many cases, the very low blood counts result
from an autoimmune process. The patient's own immune system damages their stem cells in bone
marrow.
Although immune-suppressing drugs, such as corticosteroids, CsA and ATG, have been used in
the treatment of SAA, however, many studies have indicated that the overall response rate to
these drugs is less than 60%. Addition, the severe side effects of these immune-suppressing
drugs have also been observed. The management of SAA patients therefore remains
unsatisfactory and targeted therapies are needed. Human MSCs isolated from human umbilical
cord/placenta have been shown to have immunosuppressive, stimulating hematopoiesis and
tissue repairing properties. This study will evaluate the safety and effectiveness of MSC
transplantation in the SAA patients.
This study will last 2 to 3 years. Participants will be randomly assigned to receive either
MSC transplant and CsA therapy (experimental group) or CsA therapy alone (control group).
Patients will undergo MSC transplant at the start of the study on Day 0. After 3 months,
patients will receive the second MSC transplantation. After six and twelve months from the
first transplantation, patients will be evaluated.
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Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Outcomes Assessor), Primary Purpose: Treatment
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