[Inhibiting effect of low density lipoproteins (LDL) on neutrophil function (author's transl)]. 1979

M De Martino, and A Vierucci, and M Redi Orienti, and R Biadaioli, and E Novembre

LDL preparations obtained from normal individuals of known genetic type have been added to neutrophils from healthy donors. After incubation at 37 degrees C for 30 min, and washing in Hank's solution, in order to evaluate metabolic and bactericidal activities neutrophils were assayed by the nitroblue tetrazolium (NBT) quantitative test, using latex particles, and by E. coli killing test. LDL in aliquots of 100-500 microgram/2 x 10(6) neutrophils, inhibited NBT reduction and reduced neutrophil killing of E. coli by more than 50%. No difference was observed in the degree of inhibition using LDL and neutrophils obtained from donors of either the same or of different Ag phenotype. These data suggest that the immunoregulatory activity of LDL affects lymphocyte as well as neutrophil function.

UI MeSH Term Description Entries
D008077 Lipoproteins, LDL A class of lipoproteins of small size (18-25 nm) and light (1.019-1.063 g/ml) particles with a core composed mainly of CHOLESTEROL ESTERS and smaller amounts of TRIGLYCERIDES. The surface monolayer consists mostly of PHOSPHOLIPIDS, a single copy of APOLIPOPROTEIN B-100, and free cholesterol molecules. The main LDL function is to transport cholesterol and cholesterol esters to extrahepatic tissues. Low-Density Lipoprotein,Low-Density Lipoproteins,beta-Lipoprotein,beta-Lipoproteins,LDL(1),LDL(2),LDL-1,LDL-2,LDL1,LDL2,Low-Density Lipoprotein 1,Low-Density Lipoprotein 2,LDL Lipoproteins,Lipoprotein, Low-Density,Lipoproteins, Low-Density,Low Density Lipoprotein,Low Density Lipoprotein 1,Low Density Lipoprotein 2,Low Density Lipoproteins,beta Lipoprotein,beta Lipoproteins
D009504 Neutrophils Granular leukocytes having a nucleus with three to five lobes connected by slender threads of chromatin, and cytoplasm containing fine inconspicuous granules and stainable by neutral dyes. LE Cells,Leukocytes, Polymorphonuclear,Polymorphonuclear Leukocytes,Polymorphonuclear Neutrophils,Neutrophil Band Cells,Band Cell, Neutrophil,Cell, LE,LE Cell,Leukocyte, Polymorphonuclear,Neutrophil,Neutrophil Band Cell,Neutrophil, Polymorphonuclear,Polymorphonuclear Leukocyte,Polymorphonuclear Neutrophil
D009580 Nitroblue Tetrazolium Colorless to yellow dye that is reducible to blue or black formazan crystals by certain cells; formerly used to distinguish between nonbacterial and bacterial diseases, the latter causing neutrophils to reduce the dye; used to confirm diagnosis of chronic granulomatous disease. Nitro-BT,Nitrotetrazolium Blue,Tetrazolium Nitroblue,Blue, Nitrotetrazolium,Nitroblue, Tetrazolium,Tetrazolium, Nitroblue
D001770 Blood Bactericidal Activity The natural bactericidal property of BLOOD due to normally occurring antibacterial substances such as beta lysin, leukin, etc. This activity needs to be distinguished from the bactericidal activity contained in a patient's serum as a result of antimicrobial therapy, which is measured by a SERUM BACTERICIDAL TEST. Activities, Blood Bactericidal,Activity, Blood Bactericidal,Bactericidal Activities, Blood,Bactericidal Activity, Blood,Blood Bactericidal Activities

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