Nejvíce citovaný článek - PubMed ID 378780
The bactericidal activity of sera of healthy neonates and of newborns with hyperbilirubinaemia to Escherichia coli
Resistance to 13 antimicrobial agents, resistance to the bactericidal activity of human serum, hydrophobic properties, lipolytic activity and production of histamine were determined in a total of 50 clinical Acinetobacter spp. strains (A. baumannii, A. lwoffii, A. calcoaceticus, A. haemolyticus). None of the tested isolates showed resistance to meropenem and none of A. lwoffii, A. calcoaceticus and A. haemolyticus strains were resistant to amikacin. Forty-six strains (92%) manifested resistance to ampicillin, 90% to cefuroxime, 68% to ciprofloxacin, 58% to piperacillin, gentamicin and cotrimaxazole, 50% to cefotaxime, 44% to amikacin, 42% to ceftazidime, 38% to piperacillin/tazobactam, 24% to netilmicin and 16% to ampicillin/sulbactam. In particular, A. baumannii and A. calcoaceticus strains showed considerable antibiotic resistance. Thirty-one isolates (62%) showed serum resistance; intermediate sensitivity was found in 19 isolates (38%). The majority of the strains (72%) demonstrated a strongly hydrophobic character; 16% of isolates exhibited moderate hydrophobic properties. All strains showed lipolytic activity; production of histamine was detected in 14 of 43 strains examined.
- MeSH
- Acinetobacter klasifikace účinky léků metabolismus fyziologie MeSH
- antibakteriální látky farmakologie MeSH
- bakteriální adheze * MeSH
- bakteriální léková rezistence MeSH
- baktericidní aktivita krve * MeSH
- histamin metabolismus MeSH
- hydrofobní a hydrofilní interakce MeSH
- infekce bakteriemi rodu Acinetobacter mikrobiologie MeSH
- lidé MeSH
- lipasa metabolismus MeSH
- mikrobiální testy citlivosti MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- antibakteriální látky MeSH
- histamin MeSH
- lipasa MeSH
Thirty-three uropathogenic strains of Pseudomonas aeruginosa were investigated for hemolytic activity in both bacterial broth culture filtrates and isolate lyzates, resistance to bactericidal activity of fresh human serum, resistance to six antibiotics and plasmid DNA profile. Twenty-four of the 33 (73%) bacterial filtrates showed lysis of rabbit erythrocytes, as did the three after guinea-pig erythrocyte treatment. Twelve of 33 isolate lysates showed in parallel lysis of both types of erythrocytes used. Serum resistance was found in 17 (52%) isolates, intermediate resistance in 15 (45 %) isolates and only one isolate showed serum sensitivity. Resistance to antibiotics was detected as follows (in %): tetracycline 94, kanamycin 79, chloramphenicol 76, septrin 73, ampicillin 64, streptomycin 45, gentamicin 18. None of the isolates investigated showed resistance to colistine. With the exception of one isolate, plasmid DNA was detected in all P. aeruginosa strains.
- MeSH
- antibiotická rezistence MeSH
- baktericidní aktivita krve MeSH
- dítě MeSH
- dospělí MeSH
- hemolýza MeSH
- hemolyziny biosyntéza MeSH
- infekce močového ústrojí mikrobiologie MeSH
- králíci MeSH
- lidé MeSH
- morčata MeSH
- plazmidy genetika izolace a purifikace MeSH
- předškolní dítě MeSH
- pseudomonádové infekce mikrobiologie MeSH
- Pseudomonas aeruginosa genetika izolace a purifikace patogenita MeSH
- techniky in vitro MeSH
- virulence MeSH
- zvířata MeSH
- Check Tag
- dítě MeSH
- dospělí MeSH
- králíci MeSH
- lidé MeSH
- morčata MeSH
- předškolní dítě MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- hemolyziny MeSH
The strong effects of bilirubin on various levels of the immune system are multifactorial. Concerning the mechanisms of these effects, we hypothesize that the primary causes of the described actions of bilirubin are the direct interaction of bilirubin molecules with cell membranes.
- MeSH
- bilirubin imunologie farmakologie MeSH
- imunosupresiva farmakologie MeSH
- lidé MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- přehledy MeSH
- Názvy látek
- bilirubin MeSH
- imunosupresiva MeSH
Using an in vitro phagocytic assay with synthetic 2-hydroxyethylmethacrylate copolymer particles, the phagocytic activity of leukocytes of bilirubin-treated mice (85 and 170 mumol/L in 0.5 mL intraperitoneally) was studied. Bilirubin treatment significantly stimulated the phagocytosis of both peripheral blood granulocytes and monocytes; the increase of phagocytosis persisted for 6 h after bilirubin injection. The potential immunostimulating and/or immunotoxic effect of bilirubin is discussed.
- MeSH
- bilirubin farmakologie MeSH
- časové faktory MeSH
- endotoxiny krev MeSH
- fagocytóza účinky léků MeSH
- granulocyty účinky léků fyziologie MeSH
- monocyty účinky léků fyziologie MeSH
- myši inbrední BALB C MeSH
- myši MeSH
- sérový albumin farmakologie MeSH
- zvířata MeSH
- Check Tag
- mužské pohlaví MeSH
- myši MeSH
- ženské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- bilirubin MeSH
- endotoxiny MeSH
- sérový albumin MeSH
The effect of bilirubin on the phagocytic activity of mouse peritoneal macrophages and on the expression of Fc receptors and receptors for SRBC was studied. Intraperitoneally administered bilirubin influenced the expression of Fc receptors for IgM, IgG2B, IgA and IgE, whereas the expression of other receptors as well as the phagocytic activity of peritoneal macrophages remained unchanged. The possible mechanism of the effect of bilirubin on Fc receptors is discussed.
- MeSH
- bilirubin farmakologie MeSH
- fagocytóza účinky léků MeSH
- makrofágy účinky léků imunologie MeSH
- myši inbrední BALB C MeSH
- myši MeSH
- receptory Fc účinky léků MeSH
- tvorba rozet MeSH
- zvířata MeSH
- Check Tag
- myši MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- bilirubin MeSH
- receptory Fc MeSH
Using an in vitro cytotoxicity assay (51Cr-release), it was shown that bilirubin exerts a cytotoxic effect on both adult and newborn human lymphocytes after a 1-d incubation of cells with bilirubin. The effect of bilirubin on human granulocytes was less pronounced; the association of the cytotoxic effect with a functional immunological perturbation of these cells is discussed.
- MeSH
- bilirubin farmakologie MeSH
- dospělí MeSH
- fetální krev cytologie MeSH
- granulocyty účinky léků MeSH
- lidé MeSH
- lymfocyty účinky léků MeSH
- viabilita buněk účinky léků MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- bilirubin MeSH
- MeSH
- bilirubin farmakologie MeSH
- chemotaxe leukocytů účinky léků MeSH
- dospělí MeSH
- Escherichia coli MeSH
- lidé MeSH
- neutrofily účinky léků imunologie MeSH
- zymosan farmakologie MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- bilirubin MeSH
- zymosan MeSH
Mice (strains Balb/c and A/J) received an intravenous infusion of bilirubin for a 1 d period. The infusion was delivered at various phases of the primary reaction; the degree of the immune response was expressed as the number of antibody-forming cells against sheep erythrocytes. Bilirubin infusion during both the inductive and productive phase of the primary reaction decreased significantly the immune response. We assume that bilirubin influences the differentiation of immunocompetent cells immediately after their contact with the antigen; in addition it acts in the period of the quantitative increase of the number of antibody-producing cells.
- MeSH
- bilirubin farmakologie MeSH
- buněčná diferenciace MeSH
- buněčné dělení MeSH
- buňky produkující protilátky účinky léků MeSH
- imunosupresiva * MeSH
- inbrední kmeny myší MeSH
- myši inbrední BALB C MeSH
- myši MeSH
- tvorba protilátek účinky léků MeSH
- zvířata MeSH
- Check Tag
- myši MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- bilirubin MeSH
- imunosupresiva * MeSH