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Hemophagocytic lymphohisticytosis (HLH) is a rare and severe disease of genetic origin in children (familial-HLH, F-HLH) or affecting adults secondary to infections, hematologic malignancies or auto-immune diseases (secondary_HLH, S-HLH). F-HLH are due to genetic mutations affecting the genes of perforin or proteins involved in its secretion, resulting in the complete loss of lymphocyte cytotoxicity without affecting lymphocyte number. In S-HLH, the investigators have observed a severe NK cell lymphopenia and a transient loss of cytotoxicity of unknown mechanism. In this study, the investigators will dissect macrophage activation mechanisms as well as NK cytotoxicity inability in adults patients suffering of S-HLH.
Macrophage activation could result from the loss of the retro-control normally exerted by NK cells, thus the investigators will analyze reciprocal interactions of macrophages and NK cells during the acute phase and after recovery of S-HLH.
Allocation: Non-Randomized, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Basic Science
Assistance Publique Hopitaux de Marseille
Assistance Publique Hopitaux De Marseille
Published on BioPortfolio: 2014-08-27T03:13:39-0400
This prospective study enrolls subjects who have clinical and laboratory manifestations related with hemophagocytic lymphohistiocytosis. The purpose of the study is to evaluate clinical an...
This study seeks to determine the efficacy of tocilizumab (TCZ) in patients with hemophagocytic lymphohistiocytosis (HLH) and high cytokine levels (proteins involved in inflammation) in an...
This observational study is designed to provide a better understanding of the potential use of IFNγ and IFNγ-inducible chemokines as markers of HLH disease activity and prognosis, and of...
Hemophagocytic lymphohistiocytosis in adults (HLH) is at 68% mortality whereas 78% of all cases remain undiagnosed though therapies are available which clearly reduce mortality. The invest...
This study aimed to investigate the efficacy and safety of ruxolitinib together with liposomal doxorubicin, etoposide and methylprednisolone (DEP-Ru) as a salvage therapy for refractory/re...
Hemophagocytic lymphohystiocytosis (HLH) is characterized by fever, splenomegaly, pancytopenia, and elevated levels of triglycerides and ferritin. These signs and symptoms are common to other metaboli...
We systematically searched and meta-analyzed the epidemiological characteristics, frequency of clinical signs, and outcomes of dengue-associated hemophagocytic lymphohistiocytosis. Ten electronic data...
Published studies demonstrate that placental blood samples provide acceptable results for various laboratory tests, but these studies did not include pretransfusion testing. The aim of this study was ...
Hemophagocytic lymphohistiocytosis (HLH) has been reported as a serious complication of cutaneous T-cell lymphoma (CTCL). Despite available diagnostic guidelines, it remains a diagnostic and therapeut...
Thrombotic thrombocytopenic purpura (TTP) and hemophagocytic lymphohistiocytosis (HLH) are rare hematologic conditions and have high mortality. Both TTP and HLH result from deregulation of the immune ...
The fraction of a blood sample, following CENTRIFUGATION, that is distinguished as a thin light-colored layer between the RED BLOOD CELLS, underneath it, and the PLASMA, above it. It is composed mostly of WHITE BLOOD CELLS and PLATELETS.
The number of RED BLOOD CELLS per unit volume in a sample of venous BLOOD.
The number of LEUKOCYTES and ERYTHROCYTES per unit volume in a sample of venous BLOOD. A complete blood count (CBC) also includes measurement of the HEMOGLOBIN; HEMATOCRIT; and ERYTHROCYTE INDICES.
The taking of a blood sample to determine its character as a whole, to identify levels of its component cells, chemicals, gases, or other constituents, to perform pathological examination, etc.
The analysis of a chemical substance by inserting a sample into a carrier stream of reagent using a sample injection valve that propels the sample downstream where mixing occurs in a coiled tube, then passes into a flow-through detector and a recorder or other data handling device.
Pediatrics is the general medicine of childhood. Because of the developmental processes (psychological and physical) of childhood, the involvement of parents, and the social management of conditions at home and at school, pediatrics is a specialty. With ...