CCL

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1.

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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DOI
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2.

001-es BibID:BIBFORM070757
Első szerző:Frendl István (baleseti sebész és kézsebész)
Cím:Plasminogen Activator Inhibitor Type 1 : a Possible Novel Biomarker of Late Pituitary Dysfunction after Mild Traumatic Brain Injury / Istvan Frendl, Monika Katko, Erika Galgoczi, Judit Boda, Noemi Zsiros, Zoltan Nemeti, Zsuzsanna Bereczky, Renata Hudak, Janos Kappelmayer, Annamaria Erdei, Bela Turchanyi, Endre V. Nagy
Dátum:2017
ISSN:0897-7151
Megjegyzések:More than 80% of head trauma patients suffer from mild traumatic brain injury (mTBI). However, even mTBI carries the risk of late pituitary dysfunction. A predictive biomarker at the time of injury which could identify patients who subsequently may develop permanent pituitary dysfunction would help to direct patients towards endocrine care. We enrolled 508 traumatic brain injury patients (406 with mTBI) into our study. Blood samples were collected for identification of predictive biomarkers of late pituitary dysfunction at the time of admission. Follow-up blood samples were collected between 6 to 12 months after the head trauma and were evaluated for pituitary function. Of the 406 mTBI patients, 76 were available for follow-up. Pre-existing mild pituitary dysfunction was found for 15 patients based on hormone levels at the time of injury. Of the remaining 61 patients, 10 have shown deficiency in at least one pituitary hormone: 4 had growth hormone deficiency, 3 gonadotropin, 2 thyrotropin, and 1 patient combined gonadotropin and thyrotropin deficiency. Hence, newly developed pituitary hormone deficiency was found in 16% of mTBI patients. Neither the cause of mTBI nor its complications were predictive of late pituitary dysfunction. Of the haemostasis parameters studied, lower PAI-1 level at the time of injury was found to be predictive for the development of late pituitary dysfunction; sensitivity, specificity, positive and negative predictive values were 80%, 67%, 32% and 94%, respectively. Even mild TBI carries a substantial risk of endocrine consequences. Serum PAI-1 level at the time of head trauma may serve as predictive biomarker of late pituitary dysfunction in mTBI patients.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Journal Of Neurotrauma. - 34 : 23 (2017), p. 3238-3244. -
További szerzők:Katkó Mónika (1980-) (biológus) Galgóczi Erika (1986-) (biológus) Boda Judit (belgyógyász, endokrinológus) Zsíros Noémi (1986-) (belgyógyász) Németi Zoltán Bereczky Zsuzsanna (1974-) (orvosi laboratóriumi diagnosztika szakorvos) Hudák Renáta Kappelmayer János (1960-) (laboratóriumi szakorvos) Erdei Annamária (1976-) (belgyógyász) Turchányi Béla (1957-) (traumatológus) Nagy Endre V. (1957-) (belgyógyász, endokrinológus)
Internet cím:DOI
Intézményi repozitóriumban (DEA) tárolt változat
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3.

001-es BibID:BIBFORM033174
Első szerző:Hevessy Zsuzsanna (laboratóriumi szakorvos)
Cím:Laboratory evaluation of a flow cytometric BCR-ABL immunobead assay / Zsuzsanna Hevessy, Renáta Hudák, Valéria Kiss-Sziráki, Péter Antal-Szalmás, Miklós Udvardy, László Rejtő, László Szerafin, János Kappelmayer
Dátum:2011
Megjegyzések:BACKGROUND: A new flow cytometric (FC) BCR-ABL immunobead assay has been developed recently. Here we present the laboratory evaluation of the commercially available kit. METHODS: Mononuclear cells were isolated, lysed and processed according to the instructions of the manufacturer. Anti-BCR antibodies adsorbed to capture beads bind the BCR-ABL fusion proteins of the lysed cells, a phycoerythrin (PE)-conjugated anti-ABL antibody is the detector reagent and mean fluorescence intensity (MFI) signals were recorded by flow cytometry. Detection of t(9;22)(q34;q11) translocation was carried out with a quantitative PCR assay. RESULTS: MFI results of 20 normal peripheral blood samples were 88±8 (mean±SD), CV 9%. K562 cells were used as positive control. Within-batch imprecision was excellent (3.7% in the normal and 10% in the pathological range). Cut-off was chosen at MFI 112, where both sensitivity and specificity were 100%. Altogether 17 chronic myeloid leukemia (CML) and 16 acute leukemia samples were analyzed. All PCR positive samples (n=14) were positive with the FC method and negative results were also concordant (n=15). Frozen cell lysates can be stored up to 4 weeks without significant decrease of MFI signal. CONCLUSIONS: The FC BCR-ABL assay is a fast, reproducible and reliable method that may be incorporated into standard flow cytometric protocols to help clinical decision-making.
Tárgyszavak:Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
egyetemen (Magyarországon) készült közlemény
Molekuláris Medicina
Megjelenés:Clinical Chemistry and Laboratory Medicine. - 50 : 4 (2011), p. 689-692. -
További szerzők:Hudák Renáta Kiss-Sziráki Valéria Antal-Szalmás Péter (1968-) (laboratóriumi szakorvos) Udvardy Miklós (1947-) (belgyógyász, haematológus) Rejtő László (1963-) (belgyógyász, haematológus) Szerafin László (1958-) (belgyógyászat, haematológia, klinikai onkológia szakorvos) Kappelmayer János (1960-) (laboratóriumi szakorvos)
Pályázati támogatás:TÁMOP-4.2.1/B-09/1/KONV-2010-0007
TÁMOP
Celluláris hematológia - immunológia
Internet cím:DOI
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4.

001-es BibID:BIBFORM069805
035-os BibID:(cikkazonosító)e0180477 (WOS)000405544800045 (Scopus)85022341688
Első szerző:Hudák Renáta
Cím:Low thrombin generation predicts poor prognosis in ischemic stroke patients after thrombolysis / Renáta Hudák, Edina G. Székely, Katalin R. Kovács, Attila Nagy, Gergely Hofgárt, Ervin Berényi, László Csiba, János Kappelmayer, Zsuzsa Bagoly
Dátum:2017
ISSN:1932-6203
Megjegyzések:Thrombolysis by intravenous recombinant tissue plasminogen activator (rt-PA) is an effective therapy in acute ischemic stroke (AIS). Thrombin generation test (TGT) is a global hemostasis test providing information about the speed and amount of generated thrombin in plasma. Here we aimed to find out whether results of this test before the initiation of thrombolysis might predict outcomes. Study population included 120 consecutive AIS patients, all within 4.5 hours of their symptom onset, who underwent thrombolysis by rt-PA. Blood samples were collected from all patients upon admission and TGT was performed using platelet poor plasma. Clinical data of patients including the NIHSS were registered at admission, day 1 and 7 after therapy. The ASPECT score was assessed using CT images taken before and 24 hours after thrombolysis. Long-term functional outcome was defined 3 months after the event by the modified Rankin Scale. Endogenous Thrombin Potential (ETP) and Peak Thrombin were significantly lower in patients with cardioembolic IS. Symptomatic intracranial hemorrhage (SICH) was found in 6 patients and was significantly associated with low ETP and Peak Thrombin levels. A multiple logistic regression model revealed that an ETP result in the lower quartile is an independent predictor of mortality within the first two weeks (OR: 6.03; 95%CI: 1.2-30.16, p0.05) and three months after the event (OR: 5.28; 95%CI: 1.27-21.86, p0.05). Low levels of ETP and Peak Thrombin parameters increase the risk of therapy associated SICH. A low ETP result is an independent predictor of short- and long-term mortality following thrombolysis.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Plos One. - 12 : 7 (2017), p. 1-13. -
További szerzők:Székely Edina Gabriella Czuriga-Kovács Katalin Réka (1981-) (neurológus) Nagy Attila Csaba (1981-) (megelőző orvostan és népegészségtan szakorvos, epidemiológus) Hofgárt Gergely (1984-) (neurológus) Berényi Ervin (1964-) (radiológus) Csiba László (1952-) (neurológus, pszichiáter) Kappelmayer János (1960-) (laboratóriumi szakorvos) Bagoly Zsuzsa (1978-) (orvos)
Pályázati támogatás:K-109712
OTKA
PD-111929
OTKA
TÁMOP-4.2.2.A-11/1/KONV-2012-0045
TÁMOP
GINOP-2.3.2-15-2016-00043
GINOP
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
DOI
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5.

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
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6.

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
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