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Active clinical trials for "Hemoglobinuria, Paroxysmal"

Results 101-110 of 135

Coversin in Paroxysmal Nocturnal Haemoglobinuria (PNH)

Paroxysmal Nocturnal Haemoglobinuria (PNH)

Coversin in Paroxysmal Nocturnal Haemoglobinuria (PNH) in patients with resistance to Eculizumab due to complement C5 polymorphisms.

Completed14 enrollment criteria

Donor Stem Cell Transplant After Busulfan, Fludarabine, Methylprednisolone, and Antithymocyte Globulin...

LeukemiaMyelodysplastic Syndromes2 more

RATIONALE: Giving low doses of chemotherapy and antithymocyte globulin before a donor stem cell transplant helps stop the growth of abnormal cells. It may also stop the patient's immune system from rejecting the donor's stem cells. The donated stem cells may replace the patient's immune cells and help destroy any remaining abnormal cells (graft-versus-tumor effect). PURPOSE: This phase II trial is studying how well a donor stem cell transplant works after busulfan, fludarabine, methylprednisolone, and antithymocyte globulin in treating patients with bone marrow failure syndrome.

Completed23 enrollment criteria

Eculizumab to Treat Paroxysmal Nocturnal Hemoglobinuria

HemoglobinuriaParoxysmal

This study will examine the safety and effectiveness of the experimental drug eculizumab in treating patients with paroxysmal nocturnal hemoglobinuria (PNH), a rare disorder of red blood cells that leads to premature destruction of the cells and resulting anemia. Patients may be at high risk of blood clots and may develop bone marrow failure or aplastic anemia, with low white blood cell and platelet counts. Eculizumab is a monoclonal antibody that may help improve the survival of red blood cells. Patients 18 years of age and older with PNH who require blood transfusions for anemia and have received at least four transfusions in the 12 months preceding evaluation for this study may be eligible to enroll. Candidates are screened with a medical history, physical examination, and check of vital signs. Participants have an electrocardiogram (EKG) and blood and urine tests, and are vaccinated against Neisseria meningitides, a common bacteria that can cause a disabling or fatal type of meningitis. They then enter an observation phase of the study, with monthly visits during which they complete a questionnaire; update their health status, transfusion record, and medication use; have their vital signs checked and PNH symptoms evaluated; have blood and urine tests; and receive a transfusion, if necessary. These visits continue for up to 3 months until patients receive a "qualifying" transfusion; that is, a transfusion given as a consequence of a certain hemoglobin level with symptoms or a different level without symptoms. Patients are then randomly assigned to receive either eculizumab or a placebo (salt solution with no active ingredient). Both study medications are given intravenously (through a vein) over 30 minutes once a week for five doses and then once every 2 weeks for another 11 doses. At each treatment visit (study weeks 0-24), patients update their health status, transfusion records, and medication use; have their vital signs checked; and provide a blood sample. At various visits, they also complete a questionnaire, provide a urine sample and have an EKG. At the last treatment visit (week 26 or the final visit for patients who end their participation before visit 18) patients have a complete physical examination in addition to the procedures listed above.

Completed24 enrollment criteria

Chemotherapy Plus Sargramostim in Treating Patients With Refractory Myeloid Cancer

Accelerated Phase Chronic Myelogenous LeukemiaAdult Acute Myeloid Leukemia With 11q23 (MLL) Abnormalities16 more

Drugs used in chemotherapy use different ways to stop cancer cells from dividing so they stop growing or die. Colony-stimulating factors such as sargramostim may increase the number of immune cells found in bone marrow or peripheral blood and may help a person's immune system recover from the side effects of chemotherapy. Phase I trial to study the effectiveness of bryostatin 1 combined with sargramostim in treating patients who have refractory myeloid cancer

Completed30 enrollment criteria

Stem Cell Transplantation for Patients With Hematologic Malignancies

Acute Lymphoblastic LeukemiasAcute Myelocytic Leukemia6 more

Childhood leukemias which cannot be cured by chemotherapy alone may be effectively treated by allogeneic bone marrow transplantation. Moreover, for patients with chronic myelogenous leukemia (CML), allogeneic hematopoietic stem cell transplantation (HSCT) is the only proven curative modality of treatment. Patients who have received hematopoietic stem cells from an HLA matched sibling donor have proven to be less at risk for disease relapse and regimen related toxicity. However, about 70% of patients in need of HSCT do not have an HLA matched sibling donor. This necessitates the search for alternative donors, which may increase the risk of a poor outcome. The nature of the hematopoietic stem cell graft has been implicated as a primary factor determining these outcomes. The standard stem cell graft has been unmanipulated bone marrow, but recently several advantages of T-lymphocyte depleted bone marrow and mobilized peripheral blood progenitor cells (PBPC) have been demonstrated. However, T-cell depletion may increase the risk of infectious complications and leukemic recurrence while an unmanipulated stem cell graft may increase the risk of graft vs. host disease (GVHD). A key element in long range strategies in improving outcomes for patients undergoing matched unrelated donor (MUD) HSCT is to provide the optimal graft. The primary objective of this clinical trial is to estimate the incidence of acute GVHD in pediatric patients with hematologic malignancies who receive HSCT with an unmanipulated marrow graft. The results of this study can be used as the foundation for future trials related to engineering unrelated donor graft.

Completed20 enrollment criteria

Stem Cell Transplantation as Immunotherapy for Hematologic Malignancies

LeukemiaAcute Lymphoblastic Leukemia7 more

Blood and marrow stem cell transplant has improved the outcome for patients with high-risk hematologic malignancies. However, most patients do not have an appropriate HLA (immune type) matched sibling donor available and/or are unable to identify an acceptable unrelated HLA matched donor through the registries in a timely manner. Another option is haploidentical transplant using a partially matched family member donor. Although haploidentical transplant has proven curative in many patients, this procedure has been hindered by significant complications, primarily regimen-related toxicity including GVHD and infection due to delayed immune reconstitution. These can, in part, be due to certain white blood cells in the graft called T cells. GVHD happens when the donor T cells recognize the body tissues of the patient (the host) are different and attack these cells. Although too many T cells increase the possibility of GVHD, too few may cause the recipient's immune system to reconstitute slowly or the graft to fail to grow, leaving the patient at high-risk for significant infection. For these reasons, a primary focus for researchers is to engineer the graft to provide a T cell dose that will reduce the risk for GVHD, yet provide a sufficient number of cells to facilitate immune reconstitution and graft integrity. Building on prior institutional trials, this study will provide patients with a haploidentical graft engineered to specific T cell target values using the CliniMACS system. A reduced intensity, preparative regimen will be used in an effort to reduce regimen-related toxicity and mortality. Two groups of patients were enrolled on this study. One group included those with high-risk hematologic malignancies and the second group included participants with refractory hematologic malignancies or undergoing a second transplant. The primary aim of the study was to estimate the relapse rate in the one group of research participants with refractory hematologic malignancies or those undergoing second allogeneic transplant. Both groups will be followed and analyzed separately in regards to the secondary objectives. This study was closed to accrual on April 2006 as it met the specific safety stopping rules regarding occurrence of severe graft vs. host disease. Although this study is no longer open to accrual, the treated participants continue to be followed as directed by the protocol.

Completed29 enrollment criteria

Extension Study of Eculizumab in Patients With Transfusion Dependent Paroxysmal Nocturnal Hemoglobinuria...

Paroxysmal HemoglobinuriaNocturnal

The purpose of this study is to evaluate the long-term safety of eculizumab in patients with transfusion dependent hemolytic PNH.

Completed8 enrollment criteria

Unrelated Donor Stem Cell Transplantation

Severe Aplastic AnemiaParoxysmal Nocturnal Hemoglobinuria11 more

The purpose of this study is to provide an opportunity for patients with malignancies or bone marrow failure states who lack a suitable sibling donor to undergo allogeneic hematopoietic progenitor cell transplantation using cells from unrelated individuals or cord blood registries.

Completed12 enrollment criteria

Comparison of Cy-Atg Vs Cy-Flu-Atg for the Conditioning Therapy in Allo-HCT

Bone Marrow Failure Syndromes

Randomized comparison of cyclophosphamide versus reduced-dose cyclophosphamide plus fludarabine in addition to anti-thymocyte globulin for the conditioning therapy in allogeneic hematopoietic cell transplantation for bone marrow failure syndrome.

Completed12 enrollment criteria

Transplantation of Partially Mismatched Related or Matched Unrelated Bone Marrow for Patients With...

Severe Aplastic AnemiaBone Marrow Failure Syndromes

Our primary objective is to determine if it is feasible for SAA patients to be transplanted using non-myeloablative conditioning and post transplantation cyclophosphamide with partially HLA-mismatched donors.

Completed22 enrollment criteria
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