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1.

001-es BibID:BIBFORM068946
Első szerző:Antal-Szalmás Péter (laboratóriumi szakorvos)
Cím:Quantitation of surface CD14 on human monocytes and neutrophils / Antal-Szalmas P., Van Strijp J. A. G., Weersink A. J. L., Verhoef J., Van Kessel K. P. M.
Dátum:1997
ISSN:0741-5400
Tárgyszavak:Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Journal Of Leukocyte Biology 61 : 6 (1997), p. 721-728. -
További szerzők:Strijp, Jos A. G., van Weersink, Annemarie J. L. Verhoef, Jan Kessel, Kok P. M., van
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2.

001-es BibID:BIBFORM068948
Első szerző:Antal-Szalmás Péter (laboratóriumi szakorvos)
Cím:Diverging Pathways for Lipopolysaccharide and CD14 in Human Monocytes / Peter Antal-Szalmas, Miriam J. J. G. Poppelier, Roel Broekhuizen, Jan Verhoef, Jos A. G. van Strijp, Kok P. M. van Kessel
Dátum:2000
ISSN:0196-4763
Megjegyzések:Background: CD14 is considered to be the major endotoxin(lipopolysaccharide [LPS]) binding molecule on humanmonocytes. It initiates cellular response, but its rolein the clearance of LPS is not well understood. Underconditions that ensure totally CD14-dependent LPS bindingon human monocytes, the internalization mechanismsof LPS and CD14 were studied.Methods: The uptake and intracellular distribution offluorescein isothiocyanate (FITC)-LPS and CD14 was determinedby flow cytometry, trypan blue quenching, andconfocal fluorescence microscopy. Incubation of surfacebiotinylatedcells with LPS at 37?C or 4?C and subsequentsubfractionation was used to further characterize CD14internalization. The amount of the intracellular CD14 wasestimated by CD14 enzyme-linked immunosorbent assay(ELISA).Results: The internalization rate of 10 ng/ml FITC-LPSwith 1% human serum was 1% of bound endotoxin perminute, whereas CD14 expression did not decrease at thesame time surface. We proved the presence of an intracellularCD14 pool (2.68 3 106 molecules per unstimulatedmonocyte) and could show that internalized FITCLPSmolecules can be found in different intracellularcompartments than CD14. Subfractionation of LPS-treatedbiotinylated monocytes showed no change in biotinylatedCD14 in the membrane fraction independently of theincubation temperature (37?C or at 4?C) used, indicatingthat these CD14 molecules were not taken up by an activeprocess.Conclusions: These data indicate the presence of a largeintracellular CD14 pool in monocytes with a yet unknownfunction, and suggest that LPS and CD14 molecules can beinternalized independently after association on the cellsurface.
Tárgyszavak:Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
LPS
internalization
CD14
Megjelenés:Cytometry 41 (2000), p. 279-288. -
További szerzők:Poppelier, Miriam J. J. G Broekhuizen, Roel Verhoef, Jan Strijp, Jos A. G., van Kessel, Kok P. M., van
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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3.

001-es BibID:BIBFORM068923
Első szerző:Antal-Szalmás Péter (laboratóriumi szakorvos)
Cím:Spare CD14 molecules on human monocytes enhance the sensitivity for low LPS concentrations / Antal-Szalmás Péter, Poppelier Miriam J. J. G, Sümegi Andrea, van der Bruggen Tjomme, Verhoef Jan, van Kessel Kok P. M., van Strijp Jos A. G
Dátum:2004
ISSN:0165-2478
Megjegyzések:Human monocytes express on their plasma membrane relatively large number of CD14 molecules, known to play a crucial role in thelipopolisaccharide (LPS)-mediated cellular activation. Indirect data (J. Biol. Chem. 270 (1995) 9904) suggest that not all of these CD14molecules participate in LPS-signaling, but the importance of these spare receptors and the exact number of CD14 involved in activation upondifferent LPS-stimuli is not known. Using different concentrations of a blocking anti-CD14 monoclonal antibody (mAb 60bca) we createdmonocytes with graded amounts of CD14. The exact number of occupied and free receptors was quantitated by flow cytometry and specialmAb-labeled standard beads. The number of free CD14 molecules per monocyte in the presence of 10, 3.33, 0.73, 0.25 and 0.041 g/mlmAb was 0, 13 100, 49 300, 97 700 and 165 900. Stimulation of these partially blocked monocytes with 0.1, 1, 10 and 100 ng/ml ReLPS inthe presence of 3% human serum revealed that already 13 100 and 97 700 CD14 molecules provided a maximal Tumor necrosis factor (TNF ) mRNA response using 100 and 10 ng/ml ReLPS, while the activation totally depended on the number of available CD14 moleculesin the case of 1 and 0.1 ng/ml ReLPS. Our data imply that the number of CD14 molecules available for LPS-binding influence the cellularresponse. In the presence of higher concentrations of LPS only fractions of CD14 participate in the cell activation, while the presence of thespare receptors enhance the sensitivity against lower LPS amounts.
Tárgyszavak:Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
CD14
Megjelenés:Immunology Letters 93 : 1 (2004), p. 11-15. -
További szerzők:Poppelier, Miriam J. J. G Sümegi Andrea (1969-) (biológus) van der Bruggen, Tjomme Verhoef, Jan Kessel, Kok P. M., van Strijp, Jos A. G., van
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4.

001-es BibID:BIBFORM068952
Első szerző:DeVelasco, E. Alonso
Cím:Adjuvant Quil A improves protection in mice and enhances opsonic capacity of antisera induced by pneumococcal polysaccharide conjugate vaccines / DeVelasco E. Alonso, Dekker H. A. Th., Antal-Szalmás Péter, Jalink K. P., van Strijp Jos A. G., Verheul André F. M., Verhoef Jan, Snippe H.
Dátum:1994
ISSN:0264-410X
Megjegyzések:The adjuvant Quil A has been found to enhance theresponse of mice to pneumococcal polysaccharides,polysaccharide-protein conjugates and oligosaccharideproteinconjugates I 3. Quil A augments the antipolysaccharideimmunoglobulin M (IgM) and IgG titre,changes the IgG sub-isotype distribution, and increasesthe avidity of the antibodies specific for the nativepolysaccharide after immunization with synthetic oligosaccharideconjugates. Although Quil A has a minimaleffect on the magnitude of the antibody responseof rabbits to meningococcal oligosaccharide proteinconjugates, it influences the epitope specificity of theantibodies induced 4'5. In a previous study 1, no effect ofQuil A was observed on the secondary antibody responsein mice to pneumococcal polysaccharide 17F (PS)conjugated to keyhole limpet haemocyanin (KLH). Thiswas probably due to the strong immunogenicity of theconjugate itself. Therefore, in this paper we investigatedwhether Quil A would have an effect on the primaryantibody response to the same conjugate, and a similarlyprepared conjugate differing in PS/KLH ratio. Theprimary response in mice was assessed by (i) the levelsof PS-specific antibody induced, measured by anenzyme-linked immunosorbent assay (ELISA), (ii) theprotection against a lethal challenge with S. pneumoniae17F, and (iii) the in vitro opsonic activity of the antisera.
Tárgyszavak:Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
monocytes
internalization
CD14
Megjelenés:Vaccine 12 : 15 (1994), p. 1419-1422. -
További szerzők:Dekker, H. A. Th. Antal-Szalmás Péter (1968-) (laboratóriumi szakorvos) Jalink, K. P. Strijp, Jos A. G., van Verheul, André F. M. Verhoef, Jan Snippe, H.
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5.

001-es BibID:BIBFORM068920
Első szerző:Troelstra, Annet
Cím:Saturable CD14-Dependent Binding of Fluorescein-Labeled Lipopolysaccharide to Human Monocytes / Annet Troelstra, Peter Antal-Szalmas, Lia A. M. De Graaf-Miltenburg, Annemarie J. L. Weersink, Jan Verhoef, Kok P. M. Van Kessel, Jos A. G. Van Strijp
Dátum:1997
ISSN:0019-9567
Tárgyszavak:Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Infection And Immunity 65 : 6 (1997), p. 2272-2277. -
További szerzők:Antal-Szalmás Péter (1968-) (laboratóriumi szakorvos) De Graaf-Miltenburg, Lia A. M. Weersink, Annemarie J. L. Verhoef, Jan Kessel, Kok P. M., van Strijp, Jos A. G., van
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6.

001-es BibID:BIBFORM037558
Első szerző:Vida András (molekuláris biológus, genetikus)
Cím:Neutralization of Neisseria meningitidis outer membrane vesicles / András Vida, Annet Troelstra, Péter Antal-Szalmás, Toon J. P. van Bommel, André F. M. Verheul, Jan Verhoef, Kok P. M. van Kessel, Jos A. G. van Strijp
Dátum:2011
ISSN:1023-3830
Megjegyzések:INTRODUCTION: We aimed to determine the neutralization of Neisseria meningitidis outer membrane vesicles (blebs) by humoral and cellular elements of whole blood. METHODS: The interaction of FITC-labeled blebs with monocytes was studied by spectrofluorometry. Blebs are able to induce an oxidative burst in neutrophils, and we evaluated the inhibitory effect of plasma on this process. RESULTS: Human plasma reduced the priming activity of blebs containing 1-3 ng/ml lipopolysaccharide (LPS) by 50-60% and bactericidal permeability increasing protein (BPI) reduced priming to background levels. A complete neutralization of LPS and blebs by plasma and BPI was measured using the limulus amebocyte lysate (LAL) assay. Furthermore, only 3% of blebs were cell-associated, while the remainder were in the supernatant. CONCLUSIONS: Plasma and BPI are able to neutralize blebs, with phagocytosis playing only a minor role. As such, we conclude that blebs do not behave like particles but more like free LPS.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
külföldön készült közlemény
Megjelenés:Inflammation Research. - 60 : 9 (2011), p. 801-805. -
További szerzők:Troelstra, Annet Antal-Szalmás Péter (1968-) (laboratóriumi szakorvos) Bommel, Toon J. P., van Verheul, André F. M. Verhoef, Jan Kessel, Kok P. M., van Strijp, Jos A. G., van
Pályázati támogatás:T046694
OTKA
512093-AMIS
Egyéb
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