View clinical trials related to Leukemia, Lymphoid.
Filter by:TPMT is a key enzyme in the metabolism of thiopurines. TPMT polymorphisms have been described and are associated with a decrease activity of such enzyme. Therefore, a higher risk of developing toxicity is present in patients requiring these drugs, which are indicated in acute lymphoblastic leukemia, as well as, immunosuppressors after organ transplantation. The frequency of heterozygotes polymorphisms ranges from 3 till 12 %, in different populations. Homozygous patients have a lower frequency, estimated 1 in 300 individuals. The frequency of such polymorphisms in mestizos mexican population has not been analyzed, and we considered important to determine this frequency in healthy and patients requiring thiopurines, particularly acute lymphoblastic leukemia.
RATIONALE: Drugs used in chemotherapy work in different ways to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. Giving more than one drug (combination chemotherapy) may kill more cancer cells. It is not yet known which combination chemotherapy regimen is more effective in treating acute lymphoblastic leukemia. PURPOSE: This randomized phase III trial is studying different combination chemotherapy regimens to compare how well they work in treating young patients with acute lymphoblastic leukemia.
The purpose of this study is to evaluate the incidence of neutrophil engraftment after transplantation of one or two cord blood units meeting a predetermined total minimum cell dose of 2.0 x 10 to the seventh total nucleated cell (TNC)/kg.
Primary Objective: A. To determine whether stable allogeneic hematopoietic engraftment can be safely established in patients receiving a non-myeloablative allogeneic SCT from a matched sibling donor, with fludarabine and low-dose TBI, with pre- and post-transplant immunosuppression with tacrolimus and MMF. B. To evaluate the incidence of grade II-IV GVHD associated with this treatment.
This is a Phase I/II multi-center, open label, dose escalation study to identify the maximum tolerated dose (MTD) of liposomal annamycin and to evaluate the safety of liposomal annamycin in patients with refractory or relapsed acute lymphocytic leukemia.
A randomised trial for children with acute lymphoblastic leukemia, using the detection of minimal residual disease to define risk groups, aiming to answer the questions: 1. Can treatment be reduced without compromising efficacy in a MRD-defined low risk group? 2. Does further post-remission intensification improve outcome for a MRD-defined high risk group? 3. Measure the Quality of Life impact of the different treatment arms on the children and their families.
The aims of the study are to determine whether single agent imatinib (STI571; Glivec) is more effective as up-front remission induction therapy than conventional multi-agent induction chemotherapy for elderly patients with Philadelphia positive (Ph+)ALL, whether this treatment is better tolerated, and whether subsequent combination therapy with imatinib and chemotherapy of approximately a 1 year duration is tolerable and effective with respect to maintaining remissions.
The purpose of this study is 1. to determine the correct dose for intramuscular administration 2. to compare the frequency of antibody formation after intramuscular administration of native E.coli asparaginase and PEG-asparaginase during two treatment courses in the treatment of childhood lymphoblastic leukemia
Adult acute lymphoblastic leukemia treatment approaches relie on risk stratification, including cytogenetics. We want to study at diagnosis several blast cells parameters on frozen samples of GRAALL protocols enrolled patients: 1. A CD45-DNA double staining analysed by flow cytometry will allow mesurement for each blastic clone of DNA ploidy, percentage of cells in S-phase, CD45 fluorescence index. 2. The proteine P16 metabolic way, involved in cell cycle regulation, will be studied by Western Blot analysis. The comparison between these parameters, and main haematological data, will be followed by a prognostic analysis, based on blast corticosensibility in vivo, chimiosensibility, complete remission, and survival. Combination of the studied parameters will allow to appreciate a clonal diversity. This will help to predict, at diagnosis, high probability of resistance to treatment.
Bone marrow consists of a complex hematopoietic cellular component.When the blood progenitor cells differentiate to mature cells, they will exit unassisted to peripheral blood. On the other hand, the immature cells trapped by marrow-blood barrier. However, malignant transformation of the hematopoietic progenitor cells in AML and CML results in a blockade of their ability to terminally differentiate, causing a rapid accumulation of immature cells.Chemokines have been shown to direct the movement of cells between intravascular and extravascular compartments.The CXC chemokine CXCL12, the ligand of CXCR4, activates distinct signaling pathways that may mediate cell migration.In the preliminary research, we analyze the CXCR4 expression and the chemotactic response of CXCL12 and peripheral plasma in six leukemia cell lines (HL-60, HL-CZ, K562, U937, Raji and Jurkat) and found that three categories among them could be suggested: one is CXCR4 (-) and CXCL12 response (-), such as HL-CZ and K562 cells; the other is CXCR4 (+) and CXCL12 response (-), such as HL-60 and Raji cells; the rest is CXCR4 (+) and CXCL12 response (+), such as Jurkat and U937 cells. These results make us wonder that the leukemic cells could egress to PB from BM is due to destruction of homing process or the activation of mobilization process through CXCR4-CXCL12 axis dysfunction. Therefore,we will focus on evaluating the mechanism of CXCR4-CXCL12 axis dysfunction in the various leukemic cell lines and primary leukemic cells.