Secondary Adult's Hemophagocytic Lymphohistiocytosis and Innate Immunity

2014-08-27 03:13:39 | BioPortfolio


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.

Study Design

Allocation: Non-Randomized, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Basic Science


Hemophagocytic Lymphohisticytosis


blood sample


Assistance Publique Hopitaux de Marseille




Assistance Publique Hopitaux De Marseille

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:13:39-0400

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Medical and Biotech [MESH] Definitions

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.

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