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001-es BibID:	BIBFORM067200
Első szerző:	Becs Gergely
Cím:	Haemodiafiltration elicits less platelet activation compared to haemodialysis / Gergely Becs, Renáta Hudák, Zsolt Fejes, Ildikó Beke Debreceni, Harjit Pal Bhattoa, József Balla, János Kappelmayer
Dátum:	2016
Tárgyszavak:	Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban ESRD Haemodiafiltration Haemodialysis Monocyte-platelet aggregate P-selectin
Megjelenés:	BMC Nephrology 17 : 1 (2016), p. 147. -
További szerzők:	Hudák Renáta Fejes Zsolt (1988-) (molekuláris biológus) Bekéné Debreceni Ildikó (1970-) (biológus) Bhattoa Harjit Pal (1973-) (laboratóriumi szakorvos) Balla József (1959-) (belgyógyász, nephrológus) Kappelmayer János (1960-) (laboratóriumi szakorvos)
Pályázati támogatás:	MTA-DE MTA Vascularis Biológia, Thrombosis-Haemostasis Kutatócsoport
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001-es BibID:	BIBFORM068933
Első szerző:	Hudák Renáta
Cím:	Laboratory characterization of leukemic cell procoagulants / Renáta Hudák, Ildikó Beke Debreceni, Ivett Deák, Gabriella Gál Szabó, Zsuzsanna Hevessy, Péter Antal-Szalmás, Bjarne Osterud, János Kappelmayer
Dátum:	2017
ISSN:	1434-6621
Megjegyzések:	Background: In acute myeloid leukemias, there is anincreased chance to develop thrombotic disorders. Wehypothesized that in addition to leukemic promyelocytes,monocytic leukemia cells may also have a higher procoagulantactivity.Methods: Fibrin formation was assessed by a one-stageclotting assay using a magnetic coagulometer. The thrombingeneration test (TGT) of magnetically isolated normalhuman monocytes, intact leukemic cells and their isolatedmicroparticles was performed by a fluorimetric assay.Phosphatidylserine (PS) expression of leukemic cells andmicroparticle number determinations were carried out byflow cytometry.Results: All cell lines displayed a significant procoagulantpotential compared to isolated normal human monocytes.In the TGT test, the mean of lagtime and the time to peakparameters were significantly shorter in leukemic cells(3.9?4.7 and 9.9?10.3 min) compared to monocytes (14.9and 26.5 min). The mean of peak thrombin in variousmonocytic leukemia cell lines was 112.1?132.9 nM vs.75.1 nM in monocytes; however, no significant differencewas observed in the ETP parameter. Factor VII-deficientplasma abolished all procoagulant activity, whereas factorXII-deficient plasma did not affect the speed of fibrinformation and thrombin generation but modulated theamount of thrombin. Factor XI-deficient plasma affectedthe time to peak values in one leukemic cell line and alsoattenuated peak thrombin. Leukemia cell-derived microparticlesfrom all three cell lines exerted a procoagulanteffect by significantly shortening the lagtime in TGT; therewas a nonsignificant difference in case of ETP parameter.Conclusions: All investigated monocytic leukemia celllines exhibited significant thrombin generation. This phenomenonwas achieved by the procoagulants on the surfaceof leukemic cells as well as by their microparticles.
Tárgyszavak:	Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban monocytic leukemia tissue factor
Megjelenés:	Clinical Chemistry and Laboratory Medicine 55 : 8 (2017), p. 1215-1223. -
További szerzők:	Bekéné Debreceni Ildikó (1970-) (biológus) Deák Ivett Gál Szabó Gabriella Hevessy Zsuzsanna (1966-) (laboratóriumi szakorvos) Antal-Szalmás Péter (1968-) (laboratóriumi szakorvos) Osterud, Bjarne Kappelmayer János (1960-) (laboratóriumi szakorvos)
Pályázati támogatás:	TÁMOP-4.2.4.A/2-11-1-2012-0001 TÁMOP
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM068608
035-os BibID:	(cikkazonosító)9795271 (WOS)000402835500001 (Scopus)85021663462
Első szerző:	Hudák Renáta
Cím:	The phosphatase inhibitor calyculin-A impairs clot retraction, platelet activation and thrombin generation / Hudák Renáta, Vincze János, Csernoch László, Bekéné Debreceni Ildikó, Oláh Tamás, Erdődi Ferenc, Kenneth J. Clemetson, Kappelmayer János
Dátum:	2017
ISSN:	2314-6133 2314-6141
Megjegyzések:	The aim of this study was to investigate the effect of the serine/threonine protein phosphatase inhibitor, calyculin-A (CLA) on clot formation and on the procoagulant activity of human platelets. Platelet rich plasma (PRP) samples were preincubated with buffer or CLA and subsequently platelets were activated by the protease-activated receptor 1 (PAR-1) activator, thrombin-receptor activating peptide (TRAP). Clot retraction was detected by observing clot morphology up to 1 hour, phosphatidylserine (PS)-expression was studied by flow cytometry and thrombin generation was measured by a fluorimetric assay. For the intracellular Ca2+ assay, platelets were loaded with calcium-indicator dyes and the measurements were carried out using a ratiometric method with real-time confocal microscopy. CLA preincubation inhibited clot retraction, PS-expression and thrombin formation. TRAP activation elicited Ca2+ response and PS-expression in a subset of platelets. The activated PRP displayed significantly faster and enhanced thrombin generation compared to non-activated samples. CLA pretreatment abrogated PS-exposure and clot retraction also in TRAP-activated samples. As a consequence of the inhibitory effect on calcium elevation and PS-expression, CLA significantly downregulated thrombin generation in PRP. Our results show that CLA-pretreatment may be a useful tool to investigate platelet activation mechanisms that contribute to clot formation and thrombin generation.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk phosphatases calyculin-A phosphatidylserine thrombin generation
Megjelenés:	Biomed Research International. - 2017 (2017), p. 1-10. -
További szerzők:	Vincze János (1988-) (orvos) Csernoch László (1961-) (élettanász) Bekéné Debreceni Ildikó (1970-) (biológus) Oláh Tamás (1983-) (élettanász) Erdődi Ferenc (1953-) (biokémikus) Clemetson, Kenneth J. Kappelmayer János (1960-) (laboratóriumi szakorvos)
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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