Active clinical trials for "Leukemia"

This multicenter, single arm, non-interventional, observational study will evaluate the efficacy and safety of obinutuzumab in daily clinical practice in participants with chronic lymphocytic leukemia (CLL). The study will also assess cost of disease management. The total length of the study is 42 months.

The investigators adopted the CAMS（Chinese Academy of Medical Sciences）-2009 trial for pediatric acute myeloid leukemia (AML) patients between 2009 to 2015, in which a risk-stratified strategy and dose-dense intensive chemotherapy were introduced. The outcomes of CAMS-2009 trial were retrospectively analyzed, and compared to the CAMS-2005 trial.

Myelodysplastic syndrome (MDS) is a group of medical conditions derived from progressive bone marrow failure that result in ineffective production of blood cells. Depending on the severity, MDS reduces the quality of life to the point of being life-threatening. There is a probability of death at all stages of the disease, due to complications and co-morbidities, with progression to acute myeloid leukemia (AML) being the worst evolution. Azacytidine is a nucleosidic analog with original epigenetic mechanism of action that is widely used for treating a variety of myelodysplasic syndromes. Although generally well tolerated, severe and sometimes life-threatening toxicities were unexpectedly observed in some patients. Genetic polymorphism affecting cytidine deaminase (CDA), the liver enzyme responsible for azacytidine detoxification step, could be responsible for poor clinical outcome due to on the one hand to severe toxicities in deficient patients, and on the other hand on treatment failure in ultrametabolizer patients.This clinical study aims at correlating the values in CDA levels with the risk of drug-related toxicities and to the clinical response to azacytidine treatment.

RATIONALE: Studying samples of bone marrow and blood from patients with cancer in the laboratory may help doctors learn more about changes that occur in DNA and identify biomarkers related to cancer. It may also help doctors predict how patients will respond to treatment. PURPOSE: This research study is looking at bone marrow and blood samples from patients with leukemia or other hematopoietic cancers.

RATIONALE: Studying samples of tissue from patients with cancer in the laboratory may help doctors learn more about changes that occur in DNA and identify biomarkers related to cancer. PURPOSE: This research study is looking at biomarkers in tissue samples from young patients with acute myeloid leukemia previously enrolled on clinical trial POG-9421.

RATIONALE: Studying samples of tissue from patients with cancer the in laboratory may help doctors identify and learn more about biomarkers related to cancer. PURPOSE: This research study is studying biomarkers in tissue samples from young patients with acute myeloid leukemia.

RATIONALE: Studying samples of tissue from patients with cancer in the laboratory may help doctors learn more about changes that occur in RNA and identify biomarkers related to cancer. PURPOSE: This research study is studying RNA biomarkers in tissue samples from infants with acute myeloid leukemia.

Imatinib (IM) is first-line treatment for patients with newly diagnosed CML in chronic phase. The drug is associated with high rates of cytogenetic responses with minimal toxicity in approximately 80% of patients. In 20% of patients however, the disease is either initially unresponsive to IM (Imatinib), resistance develops within a few months, or blast crisis occurs early and unexpectedly following an initial response. An increasing body of clinical evidence indicates that single agent molecularly targeted therapy (as in Gleevec/Imatinib) will not cure most patients with CML, as molecular remissions are rare. There is currently no clinically useful predictive tests to identify AT DIAGNOSIS those patients who are destined to be IM failures. The authors of this study have recently demonstrated that CML stem/progenitor cells are biologically insensitive to IM and are also genetically unstable and rapidly generate IM-resistant mutants in vitro and in vivo. The team recently discovered that the CD34 stem/progenitor cells of newly diagnosed CML patients who subsequently fail to respond to IM treatment show a reduced response to IM and a higher frequency of BCR-ABL mutations by comparison of 14 IM non-responders with 11 IM-responders. If this finding can be validated in a larger prospective cohort of patients, this predictive test could be used to more rationally design treatment plans with early addition of alternative therapies ie: Dasatinib or combination therapies for patients according to their individual risk profiles. Hypothesis: The clinical response of newly diagnosed chronic phase CML patients to IM can be predicted by certain biological properties of their CD34 stem/progenitor cells which are variable among patients.

RATIONALE: Studying samples of blood or tumor tissue from patients with cancer in the laboratory may help doctors learn more about changes that occur in DNA and identify biomarkers related to cancer. It may also help doctors predict how patients will respond to treatment. PURPOSE: This research study is studying prognostic biomarkers in cell samples from young patients with acute myeloid leukemia.

RATIONALE: Studying samples of tissue from patients with cancer in the laboratory may help doctors learn more about cancer and development of drug resistance in patients. PURPOSE: This research trial is studying proteins that may promote chemotherapy resistance in samples from patients with acute myeloid leukemia.