We investigated the effect of alveolysin on human granulocytes. Alveolysin is an exoprotein produced by Bacillus alvei and belongs to the group of sulfhydryl-activated cytolysins. Other members of this group are streptolysin O and theta-toxin from Clostridium perfringens. It is demonstrated that alveolysin leads to leukotriene generation from human granulocytes, which exert chemotactic (leukotr...

The chemotactic activity of granulocytes obtained by the Terumo Filtration Leucapheresis System (F.L.) was examined by the method of Boyden's chamber. The number of cells migrating through the Millipore filter was expressed as the chemotactic activity. The mean values were 117 for the F.L. and 122 in a control, in which cells were collected from the same donor blood using dextran sedimentation....

Sir, Chanarin‐Dorfman syndrome (CDS) is a rare inherited disorder characterized by congenital ichthyosis, nonbullous ichthyosiform erythroderma, myopathy, and hepatic involvement with deposition of neutral lipids in skin, muscle, liver, central nervous system, and granulocytes. Variable skin and systemic involvement makes diagnosis difficult in some cases wherein an easy screening tool in the f...

Granulocytes with the hybrid characteristics of eosinophils and basophils have been identified in the bone marrow and peripheral blood of humans with myeloid leukemias. We now describe a technique by which such hybrid granulocytes can be developed in vitro from normal cord blood precursors cultured in the presence of recombinant human interleukin (rhIL) 3 (350 pM) and rhIL-5 (200 pM) in a plast...

Paroxysmal nocturnal hemoglobinuria (PNH) is a clonal stem cell disorder characterized by complement-mediated hemolysis and deficient hematopoiesis. The development of PNH involves an acquired mutation in the X-linked PIG-A gene, which leads to incomplete bioassembly of glycosylphosphatidylinositol (GPI) anchors and absent or reduced surface expression of GPI-linked proteins. The origin and mec...

By RICHARD I. WALKER, J. C. HERIOX AND S. \V. SMITH, Jn. A N UNEXPECTED INCREASE in resistance to osmotic lysis of red cells passed through cotton has been observed many times in this laboratory during procedures for obtaining samples of pure lymphocytes for chemical analysis1 and in vitro culture.2 This increased resistance has been manifest by incomplete lysis on exposure to hypotonic solutio...

A direct inhibitory effect of hydrocortisone on granulocyte chemotaxis has been demonstrated with an increasing inhibition between concentrations of 5 microgram to 12.5 microgram per ml. Washing the granulocytes after incubation with hydrocortisone did not reverse the inhibitory effect on chemotaxis indicating a direct cellular effect. Bacteriocidal capacity of the hydrocortisone treated cells ...

472 Communications to the Editor 1 Glauser FL, Fairman RP The uncertain role of the neutrophil in increased permeability pulmonary edema. Chest 1985; 88:601-07 2 Dyer EL, Brigham KL, Snapper JR. Circulating granulocytes are not essential for lung mechanics changes produced by phorbol myristate acetate. Am Rev Respir Dis 1984; 129:A350 3 Dyer EL, Snapper JR. The role of circulating granulocytes ...