Active clinical trials for "Lymphocytosis"

This phase II trial studies the side effects of ex vivo-activated autologous lymph node lymphocytes infusion and to see how well they work in treating patients with chronic lymphocytic leukemia. Biological therapies, such as ex vivo-activated autologous lymph node lymphocytes, use substances made from living organisms that may stimulate or suppress the immune system in different ways and stop tumor cells from growing.

This pilot clinical trial studies the side effects and best dose of metformin hydrochloride and ritonavir in treating patients with multiple myeloma or chronic lymphocytic leukemia that has returned after a period of improvement or has not responded to treatment. Metformin hydrochloride and ritonavir may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth.

T Cell Large Granular Lymphocyte (T-LGL) Lymphoproliferative Disorders are a heterogeneous group of uncommon diseases which may involve a polyclonal or a monoclonal T cell population, which bear characteristic surface markers corresponding to activated cytotoxic (CD3+, CD8+) lymphocytes. They are often associated with quite severe neutropenia, anemia, and thrombocytopenia which may be life-threatening. There is some evidence that the abnormal cytotoxic lymphocyte population may cause the cytopenias by suppressing hematopoiesis, although the mechanism is unclear. Case reports suggest that immunosuppressive therapy directed toward T cells may reverse the cytopenia. This pilot study involving up to 25 patients evaluates the clinical response to cyclosporine, an immunosuppressive drug, and seeks to elucidate the mechanism underlying the cytopenia.

This proposal will test the hypothesis that Orencia affects apoptosis and apoptosis related genes/biomarkers in vivo in rheumatoid arthritis (RA) patients.

This study investigates families with at least two cases of B-cell lymphoproliferative disorders (LPD), and evaluates the prevalence of LPD in families, the relationship between medical history, genetic factors, and the risk of familial LPD, and various clinical outcomes for these families in a multiethnic population of Jews and Arabs in Israel.

Background: - Multiple myeloma (MM), a type of cancer that affects the white blood cells, is often preceded by a precancerous disorder known as monoclonal gammopathy of undetermined significance (MGUS). Farmers and other agricultural workers have a higher risk of developing MGUS and MM, possibly because of their exposure to certain pesticides. Researchers are interested in studying biological specimens taken from participants in the Agricultural Health Study - specifically, pesticide applicators at least 50 years of age who do not have cancer- to better understand the development of MGUS and MM. Objectives: To collect biological specimens from Agricultural Health Study participants for further research. To examine the relationship between pesticide exposure and MGUS/MM. Eligibility: - Male pesticide applicators who are over 50 years of age, cancer-free, and participating in the Agricultural Health Study. Design: Two groups of participants will complete the study: a general group and a smaller group of individuals who have been exposed to the pesticide diazinon. All participants will receive an initial contact letter with information about the study, followed by a phone call to administer a screening questionnaire and arrange a home visit from a researcher within the next month. Participants will receive by mail a urine specimen kit that will be collected at the home visit. During the home visit, a study researcher will take blood samples and collect the urine sample, and will administer another questionnaire. Participants in the group exposed to diazinon will have three home visits for the study: (1) prior to pesticide exposure, (2) the day after participants stop using diazinon, and (3) about 21 days after the second visit. The first visit will take place in the off-season from January to March; the second and third visits will be conducted between April and August. No treatment will be provided as part of this study.

Background: Chronic lymphocytic leukemia (CLL), small lymphocytic lymphoma (SLL), and mantle cell lymphoma (MCL) are types of cancers in which there are too many abnormal lymphocytes (a type of white blood cell). Monoclonal B-cell lymphocytosis (MBL) is a condition in which the individual has a larger than normal number of lymphocytes. Individuals with CLL, SLL, MBL, and MCL may survive for many years without the need for treatment, but there is an apparent correlation between cell birth rates and disease activity. By studying the birth and death rates of lymphocytes, researchers hope to identify individuals who are at risk for worsening disease. Heavy water is similar in structure to regular water, but it has two deuterium atoms instead of two hydrogen atoms. Deuterium has one more neutron than hydrogen, which is what makes heavy water heavy. Heavy water is not radioactive, looks and tastes like regular water, and has no known harmful effects at research-level doses. When a small amount of heavy water is consumed daily, newly produced blood cells are labeled (tagged), which allows researchers to track cell growth and to measure the birth and death rates of CLL, SLL, MBL, MCL or normal lymphocytes. Objectives: - To study the birth and death rates of lymphocytes from individuals with MBL, CLL/SLL, and MCL, compared with lymphocytes from healthy volunteers. Eligibility: Individuals at least 18 years of age who have been diagnosed with MBL, CLL, SLL, or MCL, but who have not been taking certain agents (Viagra, Levitra, Cialis, or other PDE-inhibitors, prednisone, cyclosporin-A, rapamycin, or other immunosuppressive agents, more than 2 cups of green tea daily, or Celebrex) for 4 weeks prior to enrollment in the study. Healthy volunteers at least 18 years of age, but who have not been taking certain agents (Viagra, Levitra, Cialis, or other PDE-inhibitors, prednisone, cyclosporin-A, rapamycin, or other immunosuppressive agents, more than 2 cups of green tea daily, or Celebrex)for 4 weeks prior to enrollment in the study. Design: Participants will be screened with a medical history, physical examination, and initial blood tests. Other tests may be administered to the individuals with cancer, as required by the study researchers. All participants will drink regular doses of heavy water daily for a total of 4 weeks (labeling period). There is an optional 6-month follow-up or wash-out period during which no additional heavy water will be consumed. Blood samples will be collected weekly during the labeling period, and a bone marrow biopsy will be obtained where possible. Individuals with cancer may also have a lymph node biopsy during this part of the study. Additional blood samples may be collected during the optional wash-out phase of the study to determine the rate at which cancer cells disappear. Treatment is not provided as part of this protocol.

D1. Primary Objective: 1. Determine the immunogenicity of FDA approved COVID-19 vaccination in patients with hematologic malignancies D2. Secondary Objectives: Assess the safety of FDA approved COVID-19 vaccination in patients with hematologic malignancies Analyze the kinetics of immunogenic response over time after receipt of the COVID-19 vaccination Compare the immunogenicity of different COVID-19 vaccinations that will be approved by the FDA Analyze advanced flow immunophenotyping of innate and adaptive immune blood cells in all participants and correlate with response to vaccination

The main purpose of this study is the description of all French cases of PPBL and the establishment of minimal criteria for the pathology diagnosis and its follow-up. The secondary objective is the immunologic and genetic characterization of lymphoid cells causing the disease.