Search Results

You are looking at 1 - 9 of 9 items for

  • Author or Editor: Ágnes Király x
  • All content x
Clear All Modify Search
Orvosi Hetilap
Authors: Patrícia Sarlós, Ágnes Király, and Lajos Nagy

Bevezetés: A Peutz–Jeghers-szindróma (PJS) autoszomális dominánsan öröklődő bélpolyposis, mely pigmentanomáliával és fokozott rákrizikóval jár. Célkitűzés, módszer: Két PJS család 5 generációját vizsgáltuk (21–21 fő) a klinikai jellemzők megítélése céljából anamnézis, fizikális vizsgálat, labor, radiológiai és eszközös vizsgálatok segítségével. Eredmények: Az A-családban a 13 érintett személy mindegyikénél születéskor jelen volt a periorális melanosis, az első tünet görcsös hasi fájdalom volt (átlag 12, 2–35 év). Kilenc betegnél összesen 14 hasi műtétet végeztek akut has miatt. 4/13 beteg vékonybélileusban halt meg (átlag 7; 2–31 év), 2/13 gasztrointesztinális (GI) eredetű tumor miatt (54 év). A B-család 7 érintett betegénél szintén hasi görcsök jelentkeztek először (átlag 22 év), fő halálokként nőgyógyászati (1/5) és gasztrointesztinális (GI) malignomák (4/5) szerepelnek időskorban. Következtetések: Eredményeink alátámasztják, hogy a PJS nem jóindulatú betegség, melynek kimenetele nehezen jósolható a variábilis expresszió és az inkomplett penetrancia miatt. Hangsúlyozni kívánjuk a családfavizsgálat szerepét, valamint a családon belüli vezető tünet meghatározását. Minden családtagnál széklet Weber és rutin laborvizsgálat elvégzését javasoljuk, ezek pozitivitása, illetve panaszok esetén teljes körű kivizsgálást protokoll szerint.

Restricted access

A method, including solid phase extraction sample preparation, overpressured layer chromatographic separation, and subsequent densitometric evaluation, was developed for measurement of total resveratrol (cis- and trans-isomers) content of wine. The amount of resveratrol was determined in wine samples from different winemaking regions of Hungary. The total resveratrol was high in Hungarian red wines (3.6–11 mg L−1), and much lower in white ones (0.04–1.5 mg L−1).

Restricted access

On the basis of our earlier observations, preliminary experiments were conducted with the fire blight pathogen Erwinia amylovora with the BioArena system using the potential antibacterial substances 1′-methylascorbigen (MeAG) as formaldehyde (HCHO) precursor and trans-resveratrol (RES) as HCHO mobilizer, capturer, and scavenger. Results showed characteristic, strong, dose-dependent antibacterial effects of both MeAG and RES present as chromatographic spots on the adsorbent layer. It is supposed that the weak antibacterial effect of AG may have originated from MeAG formed in situ on the layer by partial enzymatic methylation of AG. Addition of HCHO capture compounds (l-arginine, glutathione, glucosamine) to the culture medium before inoculation partially or totally reduced the antibacterial effect of both molecules, that is, this simplest aliphatic aldehyde, the endogenous HCHO molecule, participates in the antibacterial activity of these compounds. It follows from these results that there is a possibility of interaction between endogenous H2O2 and HCHO in the chromatographic spots and it is supposed that these reactive molecules and potential derivatives, e.g. singlet oxygen (1O2) and ozone (O3), may be the causes of the destructive effect of the fire blight pathogen on fruit trees.

Restricted access
JPC - Journal of Planar Chromatography - Modern TLC
Authors: Ernő Tyihák, Ágnes Móricz, Péter Ott, György Kátay, and Zsuzsa Király-Véghely

New results with BioArena as a complex separation and detection (evaluation) system support earlier observations that formaldehyde (HCHO) and its reaction products play a special and crucial role in the effects of antibiotic in general. It has been established that antibiotic-like compounds (e.g. trans -resveratrol, Cu(II) ions) have a duplicate inhibiting effect on pathogen cells as a result of the action of HCHO. HCHO as a key molecule of the formaldehydome participates in series of interactions which can be screened by means of different spectroscopic and chromatographic techniques; accumulation of HCHO and its reaction products in TLC spots is limited, however, so indirect detection is advantageous. In BioArena the planar stationary phase bed after TLC/HPTLC and, mainly, OPLC separation can be used for manifestation of deprivation of HCHO from antibiotic spots, for observation of the duplicate effect of substances with a direct effect, and for demonstration of cell proliferation promotion and retardation.

Restricted access

The BioArena system, which integrates the modern technique and biological results of bioautography with layer liquid chromatography is especially suitable for investigating biochemical interactions. Formaldehyde (HCHO) and its reaction products play a crucial role in the antibiotic activity of trans -resveratrol and other molecules — when HCHO-capturing molecules are used in culture media the antimicrobial activity of antibiotic-like compounds decreases substantially. HCHO and hydrogen peroxide are present as normal endogenous compounds in cells, so there is a possibility of interaction in which singlet oxygen ( 1 O 2 ) and excited HCHO can be formed. The 1 O 2 can oxidize water molecules and so H 2 O 3 can be formed, from which, by disproportion, among other reactions, ozone (O 3 ) also can be formed in the chromatographic spots. Elimination of HCHO and/or O 3 from the spots results in a decrease in the antiproliferative effect.

Restricted access

The BioArena system, which integrates the up-to-date methodology and biological results of bioautography with OPLC as an efficient planar separation technique (compact spots, etc.), is especially suitable for investigating biochemical interactions in an adsorbent bed after chromatographic separation. The first results from BioArena show that formaldehyde (HCHO), which can originate from pathogen cells in some situations, can play a special role in the antibiotic activity of trans -resveratrol. When l -arginine and glutathione were used as endogenous HCHO-capturing molecules in the culture medium the antimicrobial activity of trans -resveratrol on the adsorbent layer decreased substantially. It has been observed that trans -resveratrol generates a time-dependent, and therefore concentration-dependent, duplicate inhibiting effect on the pathogen, and that the BioArena system was suitable for illustration of this new phenomenon. It is probable that this effect occurs as a result of HCHO, with special emphasis on the possibility of interaction between the HCHO and H 2 O 2 of endogenous origin on the adsorbent layer incubated with pathogen cells. It seems that the BioArena system will be an important, indispensable complement to the basic separation technique OPLC.

Restricted access

The Mecsekalja Zone is a strike-slip fault zone that plays an essential role in the structural framework of South Transdanubia. The metamorphic and deformation history of the crystalline basement of the Mecsekalja Zone has been determined thus far based exclusively on a few surface outcrops and near-surface samples. The Szentlőrinc-1 (Sztl-1) well penetrated the shear zone at a depth of approximately 2 km and brought drilling chips from a 220-m-long section of the basement to the surface. The aim of this study is to reconstruct the metamorphic and deformation history of the Mecsekalja Zone along the Sztl-1 well using these tiny samples. These drilling chips consist of single mineral and rock pieces that are dominated by quartz grains. This study concentrates on the detailed analysis of quartz grains utilizing the physical conditions of metamorphic evolution as well as ductile and brittle deformation to determine the chemical composition and rheology of quartz. The evolution of the studied area can be determined by evaluating analytical data measured by Raman spectroscopy, LA-ICP-MS, and FTIR spectroscopy. These data suggest that the maximum temperature of the early regional metamorphism was 500–575 °C, the temperature of the subsequent ductile deformation was below 500 °C including recrystallization occurred between 400 and 475 °C. During the structural evolution of the study area, two independent, single deformation events occurred. The earlier ductile deformation event was followed by a brittle event through the reactivation of the former ductile shear zone. Our model is in accordance with previous results concerning the evolution of the Mecsekalja Zone, thus, the shear zone, with an identical evolution, can be extended toward the southwest at least to the Sztl-1 well.

Open access
Orvosi Hetilap
Authors: T. László Tamás, Tibor Garai, István Király, Andrea Mike, Csaba Nagy, Ágnes Paukovics, Péter Schmidt, Ferenc Szatmári, Tamás Tompos, Árpád Vadvári, and Ágnes Szirmai

Absztrakt:

Bevezetés és célkitűzés: A szemmozgások analízisén és az akut halláscsökkenés detektálásán alapuló 1A evidenciájú új diagnosztikai módszer hatékonyságának vizsgálata akut vestibularis szindrómákban. A perifériás és a centrális eredetű vestibularis kórképek és az izolált szédüléssel jelentkező hátsóscala-területi stroke-ok előfordulási gyakoriságának elemzése. A stroke kizárása céljából végzett sürgősségi koponya komputertomográfiás vizsgálat diagnosztikus értékének a felmérése. Egy videookulográfiás szemüveg és az audiológiai vizsgálat segítségével végzett eszközös és az eszköz nélküli, ágy melletti módszer diagnosztikai hatékonyságának az összehasonlítása. Módszer: Egy prospektív tanulmány során a győri Petz Aladár Megyei Oktató Kórház Sürgősségi Osztályán akut vestibularis szindrómával jelentkező 125 páciensnél (62 nő, 63 férfi, átlagéletkor 53 év) 2016. március 1. és 2017. március 1. között koponya komputertomográfiás vizsgálatot követően az ágy melletti fizikális, műszer nélküli és a kvantitatív, műszeres, a szemmozgások analízisén és az akut halláscsökkenés detektálásán alapuló vizsgálatot végeztük el egy video-fejimpulzusteszt szemüveg- és tisztahang-küszöb audiometriai vizsgálat segítségével. A kiszűrt stroke-esetek neuroradiológiai verifikálását végeztük koponya mágneses rezonanciás képalkotás alkalmazásával. Eredmények: Az eszközös vizsgálati módszerrel detektálva az AVS-ek 67%-a perifériás, 33%-a centrális eredetűnek bizonyult. A hátsóscala-stroke-ok 62%-a izolált szédüléssel jelentkezett, egyéb neurológiai kísérő tünet nélkül, és a stroke kizárására akutan elvégzett koponya-CT-k eredménye az esetek 96%-ában negatív volt. Az eszközös teszt a fizikális vizsgálat hatékonyságát javította, mivel detektálta a neuronitis inferior és a csak covert saccaddal kísért neuronitis superior eseteket. Következtetések: Az új, ágy melletti vizsgálati módszer, tapasztalataink szerint, alkalmas az izolált szédüléssel jelentkező hátsóscala-stroke-ok kiszűrésére a diagnosztika korai szakában, amikor a neuroradiológiai diagnosztika még alacsony szenzitivitású vagy nem elérhető. Orv Hetil. 2017; 158(51): 2029–2040.

Open access
Journal of Behavioral Addictions
Authors: Orsolya Király, Mark D. Griffiths, Daniel L. King, Hae-Kook Lee, Seung-Yup Lee, Fanni Bányai, Ágnes Zsila, Zsofia K. Takacs, and Zsolt Demetrovics

Background and aims

Empirical research into problematic video game playing suggests that overuse might cause functional and psychological impairments for a minority of gamers. Therefore, the need for regulation in the case of video games (whether governmental or self-imposed) has arisen but has only been implemented in a few countries around the world, and predominantly in Asia. This paper provides a systematic review of current and potential policies addressing problematic gaming.

Methods

After conducting a systematic search in the areas of prevention, treatment, and policy measures relating to problematic Internet and video game use, papers were selected that targeted problematic gaming policies (N = 12; six in English and six in Korean). These papers served as the basis of this review.

Results

Policies were classified into three major groups: (i) policy measures limiting availability of video games (e.g., shutdown policy, fatigue system, and parental controls), (ii) measures aiming to reduce risk and harm (e.g., warning messages), and (iii) measures taken to provide help services for gamers. Beyond the attempt to classify the current and potential policy measures, the authors also tried to evaluate their efficiency theoretically and (if data were available) empirically.

Discussion and conclusions

Overall, it appears that although several steps have been taken to address problematic video game playing, most of these steps were not as effective as expected, or had not been evaluated empirically for efficacy. The reason for this may lie in the fact that the policies outlined only addressed or influenced specific aspects of the problem instead of using a more integrative approach.

Open access