[Systemic mastocytosis with progressive disease course]. / Progresszív kórlefolyást mutató szisztémás mastocytosis.

Authors report on a case of a male patient of systemic mastocytosis that was associated with extensive cutaneous lesions. Chronic diarrhoea worsening his quality of life was well managed by the administration of antihistamines. The pleural fluid recurrence soon after drainage has been controlled by the administration of alpha interferon. 40 years after the onset of the first skin signs progression has been manifested in the development of "B" (bone marrow infiltration rate >30%, dysmyelopoiesis, serum tryptase >20 µg/L, hepato- and splenomegaly) and "C" symptoms (liver function test abnormalities, cytopenia, malabsorption, osteoporosis). The patient died at age of 87. The authors' aim was to attract attention on this rare disease and emphasize that symptomatic therapy with antihistamines and drugs available based on customised rights by the National Health Insurance Fund might provide good quality of life. Orv Hetil. 2018; 159(5): 192-196.

Antibacterial effect of microvesicles released from human neutrophilic granulocytes.

Cell-derived vesicles represent a recently discovered mechanism for intercellular communication. We investigated their potential role in interaction of microbes with host organisms. We provide evidence that different stimuli induced isolated neutrophilic granulocytes to release microvesicles with different biologic properties. Only opsonized particles initiated the formation of microvesicles that were able to impair bacterial growth. The antibacterial effect of neutrophil-derived microvesicles was independent of production of toxic oxygen metabolites and opsonization or engulfment of the microbes, but depended on ß(2) integrin function, continuous actin remodeling, and on the glucose supply. Neutrophil-derived microvesicles were detected in the serum of healthy donors, and their number was significantly increased in the serum of bacteremic patients. We propose a new extracellular mechanism to restrict bacterial growth and dissemination.