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1.

001-es BibID:BIBFORM054689
Első szerző:Antal-Szalmás Péter (laboratóriumi szakorvos)
Cím:Measurement of soluble biomarkers by flow cytometry / Péter Antal-Szalmás, Béla Nagy Jr., Ildikó Beke Debreceni, János Kappelmayer
Dátum:2013
Megjegyzések:Microparticle based flow cytometric assays for determination of the level of soluble biomarkers are widely used in several research applications and in some diagnostic setups. The major advantages of these multiplex systems are that they can measure a large number of analytes (up to 500) at the same time reducing assay time, costs and sample volume. Most of these assays are based on antigen-antibody interactions and work as traditional immunoassays, but nucleic acid alterations - by using special hybridization probes -, enzyme- substrate or receptor-ligand interactions can be also studied with them. The applied beads are nowadays provided by the manufacturers, but cheaper biological microbeads can be prepared by any user. One part of the systems can be used on any research or clinical cytometers, but some companies provide dedicated analyzers for their multiplex bead arrays. Due to the high standardization of the bead production and the preparation of the assay components the analytical properties of these assays are quite reliable with a wide range of available applications. Cytokines, intracellular fusion protei ns, activated/phosphorylated components of different signaling pathways, transcription factors and nuclear receptors can be identified and quantitated. The assays may serve the diagnostics of autoimmune disorders, different viral and bacterial infections, as well as genetic alterations such as single nucleotide polymorphisms, small deletions/insertions or even nucleotide triplet expansions can be also identified. The most important principles, technical details and applications of these systems are discussed in this short review.
Tárgyszavak:Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:EJIFCC [electronic resource]. - 23 : 4 (2013), p. [1-8]. -
További szerzők:Nagy Béla Jr. (1980-) (labordiagnosztikai szakorvos) Bekéné Debreceni Ildikó (1970-) (biológus) Kappelmayer János (1960-) (laboratóriumi szakorvos)
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2.

001-es BibID:BIBFORM099048
Első szerző:Dzsudzsák Erika
Cím:Profiling of lactate dehydrogenase isoenzymes in COVID-19 disease / Erika Dzsudzsák, Renáta Sütő, Marianna Pócsi, Miklós Fagyas, Zoltán Szentkereszty, Béla Nagy Jr.
Dátum:2021
Megjegyzések:Introduction Serum total lactate dehydrogenase (LDH) activity was elevated and showed a positive correlation with disease severity and outcome in severe COVID-19 disease. However, it is still unknown whether the relative abundance or calculated activity of any LDH isoenzyme is predominately increased in COVID-19 subjects. Methods Twenty-two consecutive patients suffered from moderate or severe COVID-19 pneumonia were recruited into this study who showed enhanced total LDH activity. The ratio of LDH isoenzyme activities was further investigated using gel electrophoresis (Hydragel, Sebia) with densitometric evaluation. Calculated act ivity values of these isoenzymes were correlated with routine laboratory parameters, the degree of lungparenchymal affection based on chest CT and clinical outcome. Results Total LDH activity was raised in the range of 272-2141 U/L and significantly correlated with calculated LDH-3 and LDH-4 activities (r=0.765, P=0.0001; and r=0.783, P=0.0001, respectively). In contrast, the relative abundance of neither LDH isoenzyme was exclusively abnormal in COVID-19 patients. Calculated activity of LDH-3 and LDH-4 demonstrated a modest but statistically significant association with serum ferritin (r=0.437, P=0.042; r=0.505, P=0.016, respectively). When the relationship between the severity of pulmonary affection by SARS-CoV-2 infection and relative abundance of LDH isoenzymes was studied, a larger ratio of mid-zone fractions was observed in the presence of ? 50% lung parenchymal involvement. Finally, regardless of LDH isoenzyme pattern, abnormal relat ive ratio of LDH-4 and higher calculated LDH-3 and LDH-4 activity values were detected in subjects with unfavorable outcome. Conclusion No characteristic profile of LDH isoenzymes can be detected in COVID-19 pneumonia, however, elevated activities of LDH-3 and LDH-4 are associated with worse clinical outcomes.
Tárgyszavak:Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
SARS-Cov-2
COVID-19
inflammation
LDH
electrophoresis
clinical outcome
Megjelenés:The Journal of the International Federation of Clinical Chemistry and Laboratory Medicine. - 32 : 4 (2021), p. 432-441. -
További szerzők:Sütő Renáta (1986-) (aneszteziológus) Pócsi Marianna (1989-) (klinikai laboratóriumi kutató) Fagyas Miklós (1984-) (orvos) Szentkereszty Zoltán Nagy Béla Jr. (1980-) (labordiagnosztikai szakorvos)
Pályázati támogatás:FK 135327
OTKA
FK 128809
OTKA
ÚNKP21-3-I-DE-255
Egyéb
ÚNKP-21-5-DE-458
Egyéb
BO/00069/21/5
MTA
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3.

001-es BibID:BIBFORM106996
Első szerző:Nagy Béla Jr. (labordiagnosztikai szakorvos)
Cím:Foreword : Current laboratory aspects of COVID-19 / Béla Nagy Jr.
Dátum:2022
Tárgyszavak:Orvostudományok Klinikai orvostudományok beszámoló
folyóiratcikk
Megjelenés:Journal of the International Federation of Clinical Chemistry and Laboratory Medicine. - 33 : 2 (2022), p. 75-78. -
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4.

001-es BibID:BIBFORM083180
Első szerző:Nagy Béla Jr. (labordiagnosztikai szakorvos)
Cím:Foreword : non-coding RNAs as potential laboratory biomarkers / Nagy Béla Jr.
Dátum:2019
Tárgyszavak:Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Journal of the International Federation of Clinical Chemistry and Laboratory Medicine. - 30 : 2 (2019), p. 110-113. -
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5.

001-es BibID:BIBFORM054688
Első szerző:Nagy Béla Jr. (labordiagnosztikai szakorvos)
Cím:Flow cytometric investigation of classical and alternative platelet activation markers / Béla Nagy Jr., Ildikó Beke Debreceni, János Kappelmayer
Dátum:2013
Megjegyzések:Platelets show a substantial role in the maintenance of vascular integrity when these cells after a rapid activation adhere to the vessel wall lesion, aggregate with other platelets and leukocytes resulting in an arterial thrombosis. Analysis of in vivo plate let activation at an early time point is crucial in the detection of developing thrombotic events. In addition, the forecast of future complications as well as the evaluation of the efficacy of anti- platelet medication are also essential in a large group of patients. Changes in the levels of platelet receptors or alteration in other surface properties due to intra- and extracellular responses t o a stimulus can be measurable primarily by flow cytometry with specific antibodies via the assessment of classical and alternative platelet activation markers. Some of these biomarkers have been already used in routine laboratory settings in many cases, while others still stand in the phase of research applications. Deficiency in platelet receptors is also accessible with this tech nique for the diagnosis of certain bleeding disorders. We here describe the most important types of platelet activation markers, and give an overview how the levels of these markers are altered in different diseases.
Tárgyszavak:Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:EJIFCC [electronic resource]. - 23 : 4 (2013), p. 124-134. -
További szerzők:Bekéné Debreceni Ildikó (1970-) (biológus) Kappelmayer János (1960-) (laboratóriumi szakorvos)
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6.

001-es BibID:BIBFORM083114
Első szerző:Szilágyi Bernadett
Cím:Role of sepsis modulated circulating microRNAs / Szilágyi Bernadett, Fejes Zsolt, Pócsi Marianna, Kappelmayer János, Nagy Béla Jr.
Dátum:2019
Tárgyszavak:Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Journal of the International Federation of Clinical Chemistry and Laboratory Medicine. - 30 : 2 (2019), p. 128-145. -
További szerzők:Fejes Zsolt (1988-) (molekuláris biológus) Pócsi Marianna (1989-) (klinikai laboratóriumi kutató) Kappelmayer János (1960-) (laboratóriumi szakorvos) Nagy Béla Jr. (1980-) (labordiagnosztikai szakorvos)
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