147 results on '"Tamaş C"'
Search Results
2. Associations of physical activity and physical education enjoyment with self-concept domains among Hungarian adolescents
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Tamás Berki, Tamás Csányi, and László Tóth
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Self-concept ,Adolescent ,Enjoyment ,PACES ,Physical activity ,Physical education ,Psychology ,BF1-990 - Abstract
Abstract Background Sport enjoyment is one of the most important factors in physical activity (PA) and physical education (PE) domains. It is not only beneficial for regular participation but also has a positive effect on mental health. Due to these benefits, this study aims to understand the relationships between PA, two forms of enjoyment, and the dimension of self-concept. Methods The sample consisted of 315 students (Mage=12.63). The Self-Description Questionnaire-I was used to measure the domains of self-concept. Enjoyment was measured with two scales. The Physical Activity Enjoyment Scale reflects extracurricular PA enjoyment, and the Factors Influencing Enjoyment of Physical Education Questionnaire reflects school PE enjoyment. The International Physical Activity Questionnaire was used to assess vigorous, moderate, and walking types of extracurricular PA enjoyment. Results Hierarchical multivariate regression analysis revealed that vigorous PA predicted physical ability (β = 0.19) and physical appearance (β = 0.15). PA enjoyment was a significant predictor of general self-concept (β = 0.29), physical ability (β = 0.28), physical appearance (β = 0.16), peer relation (β = 0.16), and parental relations (β = 0.14). PE enjoyment significantly predicted general school (β = 0.17), physical ability (β = 0.27), peer relations (β = 0.21) and parental relations (β = 0.22). Furthermore, boys scored at a higher level on most of self-concept domains. Conclusions The present study suggested that enjoyment plays a more important role in self-concept than PA. PE enjoyment mainly strengthens boys’ self-concept, but PA enjoyment is an important predictor of general self-concept in both genders. It is concluded that extracurricular PA enjoyment is beneficial, but increasing enjoyment of physical education could increase girls’ self-concepts as well.
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- 2024
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3. Kinetics and coexistence of autocatalytic reaction cycles
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Balázs Könnyű, Eörs Szathmáry, Tamás Czárán, and András Szilágyi
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Autocatalysis ,Chemostat system ,Coexistence ,Deep learning ,Reaction kinetics ,Medicine ,Science - Abstract
Abstract Biological reproduction rests ultimately on chemical autocatalysis. Autocatalytic chemical cycles are thought to have played an important role in the chemical complexification en route to life. There are two, related issues: what chemical transformations allow such cycles to form, and at what speed they are operating. Here we investigate the latter question for solitary as well as competitive autocatalytic cycles in resource-unlimited batch and resource-limited chemostat systems. The speed of growth tends to decrease with the length of a cycle. Reversibility of the reproductive step results in parabolic growth that is conducive to competitive coexistence. Reversibility of resource uptake also slows down growth. Unilateral help by a cycle of its competitor tends to favour the competitor (in effect a parasite on the helper), rendering coexistence unlikely. We also show that deep learning is able to predict the outcome of competition just from the topology and the kinetic rate constants, provided the training set is large enough. These investigations pave the way for studying autocatalytic cycles with more complicated coupling, such as mutual catalysis.
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- 2024
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4. Comparative Analysis of Five Forensic PCR Kits in Duplets
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Tamás Cseppentő, Norbert G. Valis, Gusztáv Bárány, Bálint Megadja, Attila Heinrich, and Nóra M. Magonyi
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forensic STR kits ,dual-amplification strategy ,likelihood ratio ,allelic dropout rates ,experimental investigation ,low-copy-number DNA samples ,Biochemistry ,QD415-436 - Abstract
In forensic DNA laboratories, it is important to conduct internal validations of the commercially available kits of short tandem repeat (STR) loci and to investigate their individual and combined effectiveness. This study aims to report on a comparative investigation of the forensic kits used in our laboratory and their combinations in analysing low-copy-number (LCN) human DNA samples. We used five partly overlapping multiplex kits with different marker configurations from different manufacturers: the NGM SelectTM PCR Amplification Kit, NGM DetectTM, the GlobalFilerTM Amplification Kit (Applied BiosystemTM, Foster City, CA, USA), the PowerPlex® Fusion 6C System (Promega Co., Madison, WI, USA) and the Investigator® 24plex QS Kit (Qiagen GmbH, Hilden, Germany). The efficacy of the kits was scrutinised by specific criteria, such as allelic dropout rate, the individually calculated Likelihood Ratio (LR) of consensus profiles and the LR value of the composite profile produced by the combined profiles of two kits. According to the results, the pairing of PowerPlex® Fusion 6C System and Investigator® 24plex QS produced the lowest, while the pairing of the NGM DetectTM and GlobalFilerTM kits provided the highest LR value. In summary, our study is meant to aid the selection of the optimal kit combination for samples of different qualities.
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- 2024
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5. Mechanism of motoneuronal and pyramidal cell death in amyotrophic lateral sclerosis and its potential therapeutic modulation
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Bernát Nógrádi, Dóra Nógrádi-Halmi, Barbara Erdélyi-Furka, Zalán Kádár, Tamás Csont, and Renáta Gáspár
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Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 ,Cytology ,QH573-671 - Abstract
Abstract Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disorder clinically characterized by muscle atrophy and progressive paralysis. Loss of motoneurons and pyramidal cells is thought to be the center piece of the complex and multifaceted ALS pathology, however, the exact mechanisms laying behind motoneuronal cell death in the spinal cord and motor cortex are still unknown. It was originally proposed that apoptosis plays a fundamental role in motoneuronal demise, nonetheless, later it became clear that other forms of regulated cell death, including necroptosis, pyroptosis, ferroptosis, and autophagy-dependent cell death, may also contribute to motoneuron loss. Over the past years, multiple studies aimed to improve our understanding of the contributory role of these mechanisms as well as to offer novel targets for potential therapeutic interventions. The pharmacological inhibition of the ferroptotic pathway and the modulation of the autophagic machinery seem to have particularly promising effects, reducing motoneuron loss and slowing disease progression in transgenic models of ALS. Nevertheless, the potential beneficial effects of necroptosis-targeting interventions were mostly disproven in the latest studies. In this review we aim to summarize the current view on regulated cell death mechanisms that lead to motoneuronal and pyramidal cell degeneration in ALS and showcase their applicability as future drug targets.
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- 2024
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6. Mevalonate kinase deficiency: an updated clinical overview and revision of the SHARE recommendations
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Lilla Lengvári, Kata Takács, Anna Lengyel, Annamária Pálinkás, Carine Helena Wouters, Isabelle Koné-Paut, Jasmin Kuemmerle-Deschner, Jerold Jeyaratnam, Jordi Anton, Helen Jane Lachmann, Marco Gattorno, Michael Hofer, Nataša Toplak, Peter Weiser, Tilmann Kallinich, Seza Ozen, Véronique Hentgen, Yosef Uziel, Zsuzsanna Horváth, Márton Szabados, Paul Brogan, Tamás Constantin, and Joost Frenkel
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mevalonate kinase deficiency ,diagnosis ,genetics ,treatment ,guideline ,Immunologic diseases. Allergy ,RC581-607 - Abstract
Mevalonate kinase deficiency (MKD), a rare auto-inflammatory disorder, arises from mutations in the MVK gene, disrupting isoprenoid biosynthesis, and affecting cellular processes. This comprehensive review provides an updated perspective on MKD, including its aetiology, pathogenesis, diagnostic modalities, and therapeutic strategies. Based on recent research and clinical advances, our objective is to bridge the knowledge gaps in the 2015 SHARE guidelines. By describing molecular mechanisms, diagnostic dilemmas, and emerging therapies, this article should serve as a resource for clinicians and researchers, promoting a deeper understanding of MKD and guiding optimal patient care.
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- 2024
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7. Effect of densification technology on the microstructure and mechanical properties of high-entropy (Ti, Zr, Hf, Nb, Ta)C ceramic-based cermets
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Dmytro Vedel, Tamás Csanádi, Petro Mazur, Anton Osipov, Juraj Szabó, Vladyslav Shyvaniuk, Richard Sedlák, Oleksandr Stasiuk, Veronika Kuchárová, and Oleg Grigoriev
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High-entropy ceramic ,Cermets ,Hardness ,Fracture toughness ,Crack deflection ,Clay industries. Ceramics. Glass ,TP785-869 - Abstract
High-entropy ceramic-based cermets represent a new and promising direction in improving the mechanical properties of conventional hardmetals through the formation of complex microstructures during synthesis. This has been systematically studied in two Co-free, high-entropy (Ti,Zr,Hf,Nb,Ta)C ceramic-based cermets using 10 wt% Ni and 10 wt% FeCrAl metallic binders during hot-press and spark plasma sintering. Fully densified microstructures were achieved in the temperature range of 1400–1500 °C, which is below the melting points of the pure Ni and FeCrAl alloy, owing to the liquid-phase assisted sintering. The optimal densification routes resulted in Vickers hardness (HV30) of 16.77 ± 0.72 and 18.32 ± 0.99 GPa, and fracture toughness (KIc_SENB) of 5.31 ± 0.41 and 4.83 ± 0.50 MPa m0.5, respectively for the Ni and FeCrAl bonded cermets. The improved damage tolerance of these cermets compared to the base (Ti,Zr,Hf,Nb,Ta)C high-entropy carbide is related to the reduced grain size and microstructural toughening mechanisms (e.g. crack deflection and bridging).
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- 2024
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8. Cue-driven microbial cooperation and communication: evolving quorum sensing with honest signaling
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Tamás Czárán, István Scheuring, István Zachar, and Szabolcs Számadó
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Microbial signaling ,Quorum sensing ,Threshold public goods game ,Cue ,Signal ,Honesty ,Biology (General) ,QH301-705.5 - Abstract
Abstract Background Quorum sensing (QS) is the ability of microorganisms to assess local clonal density by measuring the extracellular concentration of signal molecules that they produce and excrete. QS is also the only known way of bacterial communication that supports the coordination of within-clone cooperative actions requiring a certain threshold density of cooperating cells. Cooperation aided by QS communication is sensitive to cheating in two different ways: laggards may benefit from not investing in cooperation but enjoying the benefit provided by their cooperating neighbors, whereas Liars explicitly promise cooperation but fail to do so, thereby convincing potential cooperating neighbors to help them, for almost free. Given this double vulnerability to cheats, it is not trivial why QS-supported cooperation is so widespread among prokaryotes. Results We investigated the evolutionary dynamics of QS in populations of cooperators for whom the QS signal is an inevitable side effect of producing the public good itself (cue-based QS). Using spatially explicit agent-based lattice simulations of QS-aided threshold cooperation (whereby cooperation is effective only above a critical cumulative level of contributions) and three different (analytical and numerical) approximations of the lattice model, we explored the dynamics of QS-aided threshold cooperation under a feasible range of parameter values. We demonstrate three major advantages of cue-driven cooperation. First, laggards cannot wipe out cooperation under a wide range of reasonable environmental conditions, in spite of an unconstrained possibility to mutate to cheating; in fact, cooperators may even exclude laggards at high cooperation thresholds. Second, lying almost never pays off, if the signal is an inevitable byproduct (i.e., the cue) of cooperation; even very cheap fake signals are selected against. And thirdly, QS is most useful if local cooperator densities are the least predictable, i.e., if their lattice-wise mean is close to the cooperation threshold with a substantial variance. Conclusions Comparing the results of the four different modeling approaches indicates that cue-driven threshold cooperation may be a viable evolutionary strategy for microbes that cannot keep track of past behavior of their potential cooperating partners, in spatially viscous and in well-mixed environments alike. Our model can be seen as a version of the famous greenbeard effect, where greenbeards coexist with defectors in a evolutionarily stable polymorphism. Such polymorphism is maintained by the condition-dependent trade-offs of signal production which are characteristic of cue-based QS.
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- 2024
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9. Comparison of Reduced PCR Volume PowerPlex Fusion 6C Kit Validations on Manual and Automated Systems
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Eszter É. Lőrincz, Norbert Mátrai, Katalin A. Rádóczy, Tamás Cseppentő, Nóra M. Magonyi, and Attila Heinrich
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PowerPlex Fusion 6C ,validation ,half-volume ,forensics ,casework samples ,degradation ,Biochemistry ,QD415-436 - Abstract
The PowerPlex Fusion 6C PCR™ amplification kit provides a strong discriminatory power for human identification. We have validated the kit with a reduced volume (12.5 µL) and as part of the validation we compared the efficiency of the polymerase chain reaction (PCR) prepared manually and on Hamilton Microlab® Autolys STAR Biorobot. Three years of casework data has been also included in the validation. Optimisation was carried out on different types of samples (blood, saliva, semen) and DNA was extracted robotically. Tests were conducted at two different cycle numbers (30;32), followed by analysis on both the Applied BiosystemsTM 3500 and 3500 xL Genetic Analyzer instruments (Applied Biosystems®, Foster City, CA, USA). When the PCR was prepared manually, no allele dropout was observed over 0.15 ng input DNA. Whereas when the PCR was prepared robotically, dropout already appeared at the level of 0.15 ng input DNA. In cases when increased cycle number was utilised, an increasing number of dropouts started to arise from 0.075 ng total input DNA. Despite the fact that robotically prepared PCR produced more missing alleles than the manually prepared PCR, using the optimal 0.5 ng input DNA, both methods proved to be reliable. Based on the results, our half-volume protocol is robust, and after three years of application it has proven to be effective with respect to a large number of casework samples.
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- 2024
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10. Effects of Lactic Acid and Ascorbic Acid Mixture on Quality Properties of Wild Red Deer (Cervus elaphus) Meat
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Munkhnasan Enkhbold, Attila Lőrincz, Majd Elayan, László Friedrich, Annamária Barkó, Tamás Csurka, Anikó Boros, Géza Hitka, and Adrienn Varga-Tóth
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venison ,game meat ,organic acid ,pre-treatment ,quality parameters ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
This study investigated the effect of a 2% lactic acid and 2% ascorbic acid mixture, applied via a spray method, on the quality of wild red deer (Cervus elaphus) meat stored under vacuum packaging at 4 ± 1 °C for 21 days. A total of 48 semimembranosus muscle steaks were used, divided into two groups: 24 treated with the acid mixture and 24 non-treated controls. Key parameters, including the pH, instrumental color, bacterial counts, texture profile analysis, and protein degradation (sarcoplasmic and myofibrillar proteins) using sodium dodecyl-sulfate polyacrylamide gel electrophoresis, were assessed on different days. Treated samples exhibited significantly lower aerobic plate counts (p < 0.05) compared to controls. No significant differences in pH were found between the groups, except on day one (p < 0.05). Over time, texture analysis revealed a significant reduction in hardness, cohesiveness, and chewiness in both groups, with treated samples showing greater tenderness. Importantly, the lactic acid and ascorbic acid treatment did not adversely affect the color attributes of the meat. This method shows potential for improving the microbiological safety of venison without compromising its quality, making it a promising preservation technique for the meat industry.
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- 2024
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11. Combination of a Natural Bioactive Compound and High-Hydrostatic-Pressure Treatment to Increase the Shelf-Life and Quality of Pork Meat
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Tamás Csurka, Zoltán Fekete, Anna Visy, Karina Ilona Hidas, István Dalmadi, Ferenc Horváth, László Ferenc Friedrich, and Gábor Jónás
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pork ,natural bioactive component ,piperine ,preservative-free ,color ,texture ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Currently, there is a growing demand for ready-to-eat, prepared, high-quality, preservative-free products. However, the shelf-life of these products is often so short that a relatively high percentage of these products cannot be sold and end up as food waste. In this study, pork loin with different marinades (paprika and herbs) was treated with different high hydrostatic pressures (0 MPa, 300 MPa, 450 MPa and 600 MPa) and a bioactive component (piperine) and then the quality of the meat was examined after 0, 4, 8, 12 and 14 days of cold storage. Changes were monitored using color, pH, texture and microbiological analyses. Both pressure, piperine enrichment, storage time and the interactions of different factors had a significant effect on the quality of the loin samples with different marinades. Due to the denaturation of myoglobin, meat slices were less red and lighter after HHP treatment. The addition of piperine reduced this lightness. The pH increased with increasing pressure and decreased with storage time. HHP treatment significantly increased meat hardness, with samples treated at 600 MPa being 19% harder than those treated at 450 MPa. Microbiological results indicated that HHP at 450 MPa and 600 MPa effectively reduced anaerobic total live plate counts, ensuring satisfactory sensory and microbiological quality throughout storage. Piperine fortification also resulted in a more favorable microbiological status during storage without any perceptible change in quality properties during storage. These findings underscore the effectiveness of HHP and piperine enrichment in enhancing the safety and quality of marinated meats.
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- 2024
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12. Under pressure: the Critically Endangered common hamster in Hungary reached an all-time demographic low in 2024
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Lajos Szatmári, Gábor Sramkó, Virág Nyíri, and Tamás Cserkész
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General. Including nature conservation, geographical distribution ,QH1-199.5 - Published
- 2024
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13. Impaired Neurovascular Coupling and Increased Functional Connectivity in the Frontal Cortex Predict Age‐Related Cognitive Dysfunction
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Peter Mukli, Camila B. Pinto, Cameron D. Owens, Tamas Csipo, Agnes Lipecz, Zsofia Szarvas, Anna Peterfi, Ana Clara da Costa Pinaffi Langley, Jordan Hoffmeister, Frigyes Samuel Racz, Jonathan W. Perry, Stefano Tarantini, Ádám Nyúl‐Tóth, Farzaneh A. Sorond, Yuan Yang, Judith A. James, Angelia C. Kirkpatrick, Calin I. Prodan, Peter Toth, Juliette Galindo, Andrew W. Gardner, William E. Sonntag, Anna Csiszar, Zoltan Ungvari, and Andriy Yabluchanskiy
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aging ,cognitive decline ,functional connectivity ,functional near‐infrared spectroscopy ,neurovascular coupling ,Science - Abstract
Abstract Impaired cerebrovascular function contributes to the genesis of age‐related cognitive decline. In this study, the hypothesis is tested that impairments in neurovascular coupling (NVC) responses and brain network function predict cognitive dysfunction in older adults. Cerebromicrovascular and working memory function of healthy young (n = 21, 33.2±7.0 years) and aged (n = 30, 75.9±6.9 years) participants are assessed. To determine NVC responses and functional connectivity (FC) during a working memory (n‐back) paradigm, oxy‐ and deoxyhemoglobin concentration changes from the frontal cortex using functional near‐infrared spectroscopy are recorded. NVC responses are significantly impaired during the 2‐back task in aged participants, while the frontal networks are characterized by higher local and global connection strength, and dynamic FC (p < 0.05). Both impaired NVC and increased FC correlate with age‐related decline in accuracy during the 2‐back task. These findings suggest that task‐related brain states in older adults require stronger functional connections to compensate for the attenuated NVC responses associated with working memory load.
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- 2024
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14. Directional selection coupled with kin selection favors the establishment of senescence
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András Szilágyi, Tamás Czárán, Mauro Santos, and Eörs Szathmáry
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Aging ,Evolution ,Longevity ,Evolvability ,Kin selection ,Biology (General) ,QH301-705.5 - Abstract
Abstract Background Conventional wisdom in evolutionary theory considers aging as a non-selected byproduct of natural selection. Based on this, conviction aging was regarded as an inevitable phenomenon. It was also thought that in the wild organisms tend to die from diseases, predation and other accidents before they could reach the time when senescence takes its course. Evidence has accumulated, however, that aging is not inevitable and there are organisms that show negative aging even. Furthermore, old age does play a role in the deaths of many different organisms in the wild also. The hypothesis of programmed aging posits that a limited lifespan can evolve as an adaptation (i.e., positively selected for) in its own right, partly because it can enhance evolvability by eliminating “outdated” genotypes. A major shortcoming of this idea is that non-aging sexual individuals that fail to pay the demographic cost of aging would be able to steal good genes by recombination from aging ones. Results Here, we show by a spatially explicit, individual-based simulation model that aging can positively be selected for if a sufficient degree of kin selection complements directional selection. Under such conditions, senescence enhances evolvability because the rate of aging and the rate of recombination play complementary roles. The selected aging rate is highest at zero recombination (clonal reproduction). In our model, increasing extrinsic mortality favors evolved aging by making up free space, thereby decreasing competition and increasing drift, even when selection is stabilizing and the level of aging is set by mutation-selection balance. Importantly, higher extrinsic mortality is not a substitute for evolved aging under directional selection either. Reduction of relatedness decreases the evolved level of aging; chance relatedness favors non-aging genotypes. The applicability of our results depends on empirical values of directional and kin selection in the wild. Conclusions We found that aging can positively be selected for in a spatially explicit population model when sufficiently strong directional and kin selection prevail, even if reproduction is sexual. The view that there is a conceptual link between giving up clonal reproduction and evolving an aging genotype is supported by computational results.
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- 2023
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15. Phylogenomic insights into the polyphyletic nature of Altai falcons within eastern sakers (Falco cherrug) and the origins of gyrfalcons (Falco rusticolus)
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Liudmila Zinevich, Mátyás Prommer, Levente Laczkó, Daria Rozhkova, Alexander Sorokin, Igor Karyakin, János Bagyura, Tamás Cserkész, and Gábor Sramkó
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Medicine ,Science - Abstract
Abstract The Altai falcon from Central Asia always attracted the attention of humans. Long considered a totemic bird in its native area, modern falconers still much appreciated this large-bodied and mighty bird of prey due to its rarity and unique look. The peculiar body characteristics halfway between the saker falcon (Falco cherrug) and the gyrfalcon (F. rusticolus) triggered debates about its contentious taxonomy. The weak phylogenetic signal associated with traditional genetic methods could not resolve this uncertainty. Here, we address the controversial evolutionary origin of Altai falcons by means of a genome-wide approach, Restriction-site Associated DNA sequencing, using sympatric eastern sakers falcons, allopatric western saker falcons and gyrfalcons as outgroup. This approach provided an unprecedented insight into the phylogenetic relationships of the studied populations by delivering 17,095 unlinked SNPs shedding light on the polyphyletic nature of Altai falcons within eastern sakers. Thus we concluded that the former must correspond to a low taxonomic rank, probably an ecotype or form of the latter. Also, we found that eastern sakers are paraphyletic without gyrfalcons, thus, these latter birds are best regarded as the direct sister lineage of the eastern sakers. This evolutionary relationship, corroborated also by re-analyzing the dataset with the inclusion of outgroup samples (F. biarmicus and F. peregrinus), put eastern sakers into a new light as the potential ancestral genetic source of high latitude and altitude adaptation in descendent populations. Finally, conservation genomic values hint at the stable genetic background of the studied saker populations.
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- 2023
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16. Effect of Eccentric Exercise on Metabolic Health in Diabetes and Obesity
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Gergő Szűcs, Márton Pipicz, Márton Richárd Szabó, Tamás Csont, László Török, and Csaba Csonka
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Eccentric training ,Lengthening contraction ,Exercise ,Downhill ,Prediabetes ,Insulin resistance ,Sports medicine ,RC1200-1245 - Abstract
Abstract There is a growing body of evidence showing the importance of physical activity against civilization-induced metabolic diseases, including type 2 diabetes (T2DM) and obesity. Eccentric contraction, when skeletal muscles generate force by lengthening, is a unique type of skeletal muscle activity. Eccentric contraction may lead to better power production characteristics of the muscle because eccentric contraction requires less energy and can result in higher tension. Therefore, it is an ideal tool in the rehabilitation program of patients. However, the complex metabolic effect (i.e., fat mass reduction, increased lipid oxidation, improvement in blood lipid profile, and increased insulin sensitivity) of the eccentric contraction alone has scarcely been investigated. This paper aims to review the current literature to provide information on whether eccentric contraction can influence metabolic health and body composition in T2DM or obesity. We also discussed the potential role of myokines in mediating the effects of eccentric exercise. A better understanding of the mechanism of eccentric training and particularly their participation in the regulation of metabolic diseases may widen their possible therapeutic use and, thereby, may support the fight against the leading global risks for mortality in the world.
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- 2023
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17. Comprehensive Characterization of Phytochemical Composition, Membrane Permeability, and Antiproliferative Activity of Juglans nigra Polyphenols
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Rita Osztie, Tamás Czeglédi, Sarah Ross, Bence Stipsicz, Eszter Kalydi, Szabolcs Béni, Imre Boldizsár, Eszter Riethmüller, Szilvia E. Bősze, and Ágnes Alberti
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Juglans nigra ,black walnut ,UHPLC-MS/MS ,PAMPA-BBB ,PAMPA-GI ,juglone ,Biology (General) ,QH301-705.5 ,Chemistry ,QD1-999 - Abstract
The aim of our study was the detailed polyphenol profiling of Juglans nigra and the characterization of the membrane permeability and antiproliferative properties of its main phenolics. A total of 161 compounds were tentatively identified in J. nigra bark, leaf, and pericarp extracts by ultrahigh-performance liquid chromatography–high-resolution tandem mass spectrometry (UHPLC-HR-MS/MS). Eight compounds including myricetin-3-O-rhamnoside (86), quercetin-3-O-rhamnoside (106), quercetin-3-O-xyloside (74), juglone (141), 1,2,3,4-tetrahydro-7,8-dihydroxy-4-oxonaphthalen-1-yl-6-O-galloyl-glucoside (92), ellagic acid (143), gallic acid (14), and ethyl gallate (58) were isolated from J. nigra pericarp. The in vitro antiproliferative activity of the isolated compounds was investigated against three human cancer cell lines, confirming that juglone (141) inhibits cell proliferation in all of them, and has similar activity as the clinical standards. The permeability of the isolated compounds across biological membranes was evaluated by the parallel artificial membrane permeability assay (PAMPA). Both juglone (141) and ethyl-gallate (58) showed positive results in the blood–brain-barrier-specific PAMPA-BBB study. Juglone (141) also possesses logPe values which indicates that it may be able to cross both the GI and BBB membranes via passive diffusion.
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- 2024
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18. Model-Independent Odderon Results Based on New TOTEM Data on Elastic Proton–Proton Collisions at 8 TeV
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Tamás Csörgő, Tamás Novák, Roman Pasechnik, András Ster, and István Szanyi
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odderon ,Large Hadron Collider ,TOTEM experiment ,elastic proton-proton scattering ,forward physics ,diffractive scattering of hadrons ,Elementary particle physics ,QC793-793.5 - Abstract
Evaluating the H(x,s|pp) scaling function of elastic proton–proton (pp) collisions from recent TOTEM data at s=8 TeV and comparing it with the same function of elastic proton–antiproton (pp¯) data of the D0 collaboration at s=1.96 TeV, we find, from this comparison alone, an at least 3.79 σ signal of odderon exchange. If we combine this model-independently obtained result with that of a similar analysis but using TOTEM elastic pp scattering data at s=7 TeV, which resulted in an at least 6.26 σ signal, the combined significance of odderon exchange increases to at least 7.08 σ. Further combinations of various datasets in the TeV energy range are detailed in the manuscript.
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- 2024
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19. High-Repetition-Rate Attosecond Extreme Ultraviolet Beamlines at ELI ALPS for Studying Ultrafast Phenomena
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Mojtaba Shirozhan, Sudipta Mondal, Tímea Grósz, Balázs Nagyillés, Balázs Farkas, Arjun Nayak, Naveed Ahmed, Indranuj Dey, Shivani Choudhary De Marco, Kwinten Nelissen, Miklos Kiss, Lénárd Gulyás Oldal, Tamás Csizmadia, Zoltán Filus, Massimo De Marco, Saibabu Madas, Mousumi Upadhyay Kahaly, Dimitris Charalambidis, Paraskevas Tzallas, Elisa Appi, Robin Weissenbilder, P. Eng-Johnsson, Anne L’Huillier, Zsolt Diveki, Balázs Major, Katalin Varjú, and Subhendu Kahaly
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Physics ,QC1-999 ,Applied optics. Photonics ,TA1501-1820 - Abstract
Advancements in light engineering have led to the creation of pulsed laser sources capable of delivering high-repetition-rate, high-power few-cycle laser pulses across a wide spectral range, enabling exploration of many fascinating nonlinear processes occurring in all states of matter. High-harmonic generation, one such process, which converts the low-frequency photons of the driver laser field into soft x-rays, has revolutionized atomic, molecular, and optical physics, leading to progress in attosecond science and ultrafast optoelectronics. The Extreme Light Infrastructure, Attosecond Light Pulse Source (ELI ALPS) facility pioneers state-of-the-art tools for research in these areas. This paper outlines the design rationale, capabilities, and applications of plasma- and gas-based high-repetition-rate (1 kHz to 100 kHz) attosecond extreme ultraviolet (XUV) beamlines developed at ELI ALPS, highlighting their potential for advancing various research fields.
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- 2024
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20. Diagnostic value of [Tc]Tc-PSMA-I&S-SPECT/CT for the primary staging and restaging of prostate cancer
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István Farkas, Gábor Sipka, Annamária Bakos, Anikó Maráz, Zoltán Bajory, Zsófia Mikó, Tamás Czékus, Szabolcs Urbán, Linda Varga, László Pávics, and Zsuzsanna Besenyi
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Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Background: A large number of studies have proved that prostate-specific membrane antigen-positron emission tomography/computer tomography (PSMA-PET/CT) provides excellent accuracy in primary staging and restaging of prostate cancer. Less data exist with PSMA-single photon emission computed tomography (SPECT)/CT investigations. Objective: The aim of this study was to evaluate the performance of [ 99m Tc]Tc-PSMA-I&S (for imaging and surgery) in prostate cancer. Design and methods: We retrospectively analysed PSMA-SPECT/CT scans of 20 healthy volunteers and 100 male patients with prostate cancer. All of them had histologically confirmed prostate cancer. In all, 28 patients were examined for primary staging and 72 for biochemical recurrence or progressive disease. Whole body SPECT/CT imaging was carried out 6 h after the intravenous administration of 666 ± 102 MBq [ 99m Tc]Tc-PSMA-I&S. Images were evaluated visually and semi-quantitatively. Results: Patient-based sensitivity, specificity, positive predictive value, negative predictive value and accuracy for primary prostate cancer were 86%, 100%, 100%, 83% and 92%, respectively. For detecting metastases in primary staging, these values were 88%, 100%, 100%, 85% and 93%, respectively. The radiopharmaceutical uptake of primary prostate cancer was significantly higher than in normal prostate. The patient-based sensitivity, specificity, positive predictive value, negative predictive value and accuracy of the method in the visualization of local recurrence were 67%, 100%, 100%, 86% and 89%, and for detecting metastases in restaging were 91%, 92%, 98%, 75% and 91%, respectively. In restaging, detection rates were 37% under prostate-specific antigen level of 1 ng/mL, 74% between 1 and 5 ng/mL and 80% >5 ng/mL. Conclusion: [ 99m Tc]Tc-PSMA-I&S-SPECT/CT can be easily integrated into the routine diagnostic practice, and it provides usable data in primary staging and restaging of prostate cancer. Quantitative assessment of PSMA-SPECT/CT has the potential to be used to differentiate between physiological and pathological intraprostatic tracer uptake.
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- 2024
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21. Evaluation of the failure effects of a screwing station using a new approached FMEA
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Edina Ungvári, István Gábor Gyurika, and Tamás Csiszér
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Evaluation of the failure effect in the FMEA method ,Science - Abstract
Recognizing the importance of risk assessment and the large-scale industrial spread of network research, we developed a new approach to risk assessment. • The risk assessment takes into account the chains of impact between each level and the frequency of effects and their causes. • In contrast to the traditional FMEA methodology, we evaluate the frequency of occurrence and detectability not only at the level of causes but also at the level of effects. • All this is complemented by a toolkit of network research methodology. The new methodology is validated through a real industry example, which is a risk assessment of a screwdriver station.
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- 2023
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22. The Proteoglycans Biglycan and Decorin Protect Cardiac Cells against Irradiation-Induced Cell Death by Inhibiting Apoptosis
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Renáta Gáspár, Petra Diószegi, Dóra Nógrádi-Halmi, Barbara Erdélyi-Furka, Zoltán Varga, Zsuzsanna Kahán, and Tamás Csont
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proteoglycan ,biglycan ,decorin ,radiation-induced heart disease ,cardioprotection ,apoptosis ,Cytology ,QH573-671 - Abstract
Radiation-induced heart disease (RIHD), a common side effect of chest irradiation, is a primary cause of mortality among patients surviving thoracic cancer. Thus, the development of novel, clinically applicable cardioprotective agents which can alleviate the harmful effects of irradiation on the heart is of great importance in the field of experimental oncocardiology. Biglycan and decorin are structurally related small leucine-rich proteoglycans which have been reported to exert cardioprotective properties in certain cardiovascular pathologies. Therefore, in the present study we aimed to examine if biglycan or decorin can reduce radiation-induced damage of cardiomyocytes. A single dose of 10 Gray irradiation was applied to induce radiation-induced cell damage in H9c2 cardiomyoblasts, followed by treatment with either biglycan or decorin at various concentrations. Measurement of cell viability revealed that both proteoglycans improved the survival of cardiac cells post-irradiation. The cardiocytoprotective effect of both biglycan and decorin involved the alleviation of radiation-induced proapoptotic mechanisms by retaining the progression of apoptotic membrane blebbing and lowering the number of apoptotic cell nuclei and DNA double-strand breaks. Our findings provide evidence that these natural proteoglycans may exert protection against radiation-induced damage of cardiac cells.
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- 2024
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23. Evaluation of Color and Pigment Changes in Tomato after 1-Methylcyclopropene (1-MCP) Treatment
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Zsuzsanna Horváth-Mezőfi, László Baranyai, Lien Le Phuong Nguyen, Mai Sao Dam, Nga Thi Thanh Ha, Mónika Göb, Zoltán Sasvár, Tamás Csurka, Tamás Zsom, and Géza Hitka
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tomato ,1-MCP ,chlorophyll fluorescence ,image processing ,quality ,Chemical technology ,TP1-1185 - Abstract
The Polar Qualification System (PQS) was applied on hue spectra fingerprinting to describe color changes in tomato during storage. The cultivar ‘Pitenza’ was harvested at six different maturity stages, and half of the samples were subjected to gaseous 1-methylcyclopropene (1-MCP) treatment. Reference color parameters were recorded with a vision system colorimeter instrument, and the fruit pigment concentration was assessed with the DA-index®. Additionally, acoustic firmness (Stiffness) was measured. All acquired reference parameters were used to grade fruit in the supply chain. The applied 1-MCP treatments were used to control the ripening of climacteric horticultural produce. Both the DA-index® and stiffness values, presented as chlorophyll concentration and acoustic firmness, showed significant differences among maturity stages and treated and control samples and in their kinetics during storage. The machine vision parameter PQS-X was significantly affected by 1-MCP treatment (F = 10.18, p < 0.01), while PQS-Y was primarily affected by storage time (F = 18.18, p < 0.01) and maturity stage (F = 11.15, p < 0.01). A significant correlation was achieved for acoustic firmness with normalized color (r > 0.78) and PQS-Y (r > 0.80), as well as for the DA-index® (r > 0.9). The observed color changes agreed with the reference measurements. The significant statistical effect on the PQS coordinates suggests that hue spectra fingerprinting with this data compression technique is suitable for quality assessment based on color.
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- 2024
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24. Exploring the Influence of Gut–Brain Axis Modulation on Cognitive Health: A Comprehensive Review of Prebiotics, Probiotics, and Symbiotics
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Mónika Fekete, Andrea Lehoczki, Dávid Major, Vince Fazekas-Pongor, Tamás Csípő, Stefano Tarantini, Zoltán Csizmadia, and János Tamás Varga
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cognitive function ,prebiotic ,probiotic ,symbiotic ,dementia ,randomized controlled trial ,Nutrition. Foods and food supply ,TX341-641 - Abstract
Recent research exploring the relationship between the gut and the brain suggests that the condition of the gut microbiota can influence cognitive health. A well-balanced gut microbiota may help reduce inflammation, which is linked to neurodegenerative conditions. Prebiotics, probiotics, and symbiotics are nutritional supplements and functional food components associated with gastrointestinal well-being. The bidirectional communication of the gut–brain axis is essential for maintaining homeostasis, with pre-, pro-, and symbiotics potentially affecting various cognitive functions such as attention, perception, and memory. Numerous studies have consistently shown that incorporating pre-, pro-, and symbiotics into a healthy diet can lead to improvements in cognitive functions and mood. Maintaining a healthy gut microbiota can support optimal cognitive function, which is crucial for disease prevention in our fast-paced, Westernized society. Our results indicate cognitive benefits in healthy older individuals with probiotic supplementation but not in healthy older individuals who have good and adequate levels of physical activity. Additionally, it appears that there are cognitive benefits in patients with mild cognitive impairment and Alzheimer’s disease, while mixed results seem to arise in younger and healthier individuals. However, it is important to acknowledge that individual responses may vary, and the use of these dietary supplements should be tailored to each individual’s unique health circumstances and needs.
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- 2024
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25. Simple Lévy α-Stable Model Analysis of Elastic pp and pp¯ Low-|t| Data from SPS to LHC Energies
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Tamás Csörgő, Sándor Hegyi, and István Szanyi
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elastic scattering ,proton–proton ,proton–antiproton ,Lévy-α stable model ,Elementary particle physics ,QC793-793.5 - Abstract
A simple Lévy α-stable (SL) model is used to describe the data on elastic pp and pp¯ scattering at low-|t| from SPS energies up to LHC energies. The SL model is demonstrated to describe the data with a strong non-exponential feature in a statistically acceptable manner. The energy dependence of the parameters of the model is determined and analyzed. The Lévy α parameter of the model has an energy-independent value of 1.959 ± 0.002 following from the strong non-exponential behavior of the data. We strengthen the conclusion that the discrepancy between TOTEM and ATLAS elastic pp differential cross section measurements arises only in the normalization and not in the shape of the distribution of the data as a function of t. We find that the slope parameter has different values for pp and pp¯ elastic scattering at LHC energies. This may be the effect of the odderon exchange or the jump in the energy dependence of the slope parameter in the energy interval 3 GeV ≲s≲ 4 GeV.
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- 2024
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26. Circulating microRNAs correlate with structural and functional MRI parameters in patients with multiple sclerosis
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Lili Geiger, Gergely Orsi, Tamás Cseh, Katalin Gombos, Zsolt Illés, and Boldizsár Czéh
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default mode network ,droplet digital PCR ,magnetic resonance imaging ,miR-92a ,mIR-142 ,miR-143 ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
IntroductionCirculating microRNAs are promising biomarkers for multiple sclerosis (MS). Our aim was to correlate serum microRNA levels with various magnetic resonance imaging (MRI) parameters.MethodsWe recruited 50 MS patients and measured cervical spine and cerebral white matter lesions together with regional brain volumes. Microstructural changes in the white matter were investigated with diffusion tensor imaging. Magnetic resonance spectroscopy was performed to measure cerebral metabolites. Functional connectivity within the default mode network was examined with resting-state functional MRI. On the day of the MRI measurements, we collected serum samples and carried out quantitative analysis of ten pre-selected microRNAs using droplet digital PCR.ResultsSerum level of miR-143.3p could differentiate between MS subtypes and had lower levels in progressive MS types. We found significant associations between microRNA levels and MRI measures: (1) higher miR-92a.3p and miR-486.5p levels were associated with greater total white matter lesion volumes within the cervical spine, (2) decreased miR-142.5p levels was associated with reduced total creatinine concentration and (3) miR-92a.3p, miR-142.5p and miR-486.5p levels were associated with functional connectivity strengths between specific nodes of the default mode network. Specifically, we found a negative association between miR-92a.3p and miR-486.5p levels and connectivity strength between the lateral temporal cortex and posterior inferior parietal lobule, and a positive association between miR-142.5p level and connectivity strength between the retrosplenial cortex and temporal pole. However, miRNA levels were not associated with regional brain volumes.ConclusionWe provide here further evidence that circulating microRNAs may show correlation with both structural and functional neuroimaging outcomes in patients with MS.
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- 2023
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27. Detection and sequence analysis of Canine morbillivirus in multiple species of the Mustelidae family
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Zsófia Lanszki, József Lanszki, Gábor Endre Tóth, Tamás Cserkész, Gábor Csorba, Tamás Görföl, András István Csathó, Ferenc Jakab, and Gábor Kemenesi
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Carnivora ,Mustelids ,NGS ,MinION ,Third generation sequencing ,Protected species ,Veterinary medicine ,SF600-1100 - Abstract
Abstract Background Canine morbillivirus (canine distemper virus, CDV) is a member of the Paramyxoviridae family. Canine distemper is a serious viral disease that affects many mammalian species, including members of the Mustelidae family. These animals have an elusive nature, which makes related virological studies extremely challenging. There is a significant knowledge gap about the evolution of their viruses and about the possible effects of these viruses to the population dynamics of the host animals. Spleen and lung tissue samples of 170 road-killed mustelids belonging to six species were collected between 1997 and 2022 throughout Hungary and tested for CDV with real-time RT-PCR. Results Three species were positive for viral RNA, 2 out of 64 Steppe polecats (Mustela eversmanii), 1 out of 36 European polecats (Mustela putorius) and 2 out of 36 stone martens (Martes foina); all 18 pine martens (Martes martes), 10 least weasels (Mustela nivalis) and 6 stoats (Mustela erminea) tested negative. The complete CDV genome was sequenced in five samples using pan-genotype CDV-specific, amplicon-based Nanopore sequencing. Based on the phylogenetic analysis, all five viral sequences were grouped to the Europe/South America 1 lineage and the distribution of one sequence among trees indicated recombination of the Hemagglutinin gene. We verified the recombination with SimPlot analysis. Conclusions This paper provides the first CDV genome sequences from Steppe polecats and additional complete genomes from European polecats and stone martens. The infected specimens of various species originated from distinct parts of the country over a long time, indicating a wide circulation of CDV among mustelids throughout Hungary. Considering the high virulence of CDV and the presence of the virus in these animals, we highlight the importance of conservation efforts for wild mustelids. In addition, we emphasize the importance of full genomic data acquisition and analysis to better understand the evolution of the virus. Since CDV is prone to recombination, specific genomic segment analyses may provide less representative evolutionary traits than using complete genome sequences.
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- 2022
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28. Scaling Behaviour of dN/dy in High-Energy Collisions
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Gábor Kasza and Tamás Csörgő
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heavy-ion physics ,rapidity distribution ,scaling ,hydrodynamics ,exact solutions ,data collapsing ,Elementary particle physics ,QC793-793.5 - Abstract
From a recently found family of analytic, finite and accelerating 1+1-dimensional solutions to perfect fluid relativistic hydrodynamics, we derive simple and powerful formulae to describe the rapidity and pseudorapidity density distributions. By introducing a new scaling function, we notice that the rapidity distribution data of the different experiments all collapse into a single curve. This data-collapsing (or -scaling) behaviour in the rapidity distributions suggests that high-energy p+p collisions may be described as collective systems.
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- 2024
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29. Improving Cognitive Function with Nutritional Supplements in Aging: A Comprehensive Narrative Review of Clinical Studies Investigating the Effects of Vitamins, Minerals, Antioxidants, and Other Dietary Supplements
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Mónika Fekete, Andrea Lehoczki, Stefano Tarantini, Vince Fazekas-Pongor, Tamás Csípő, Zoltán Csizmadia, and János Tamás Varga
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dementia ,cognitive function ,dietary supplement intervention ,randomized controlled trial ,vitamin ,mineral ,Nutrition. Foods and food supply ,TX341-641 - Abstract
Cognitive impairment and dementia are burgeoning public health concerns, especially given the increasing longevity of the global population. These conditions not only affect the quality of life of individuals and their families, but also pose significant economic burdens on healthcare systems. In this context, our comprehensive narrative review critically examines the role of nutritional supplements in mitigating cognitive decline. Amidst growing interest in non-pharmacological interventions for cognitive enhancement, this review delves into the efficacy of vitamins, minerals, antioxidants, and other dietary supplements. Through a systematic evaluation of randomized controlled trials, observational studies, and meta-analysis, this review focuses on outcomes such as memory enhancement, attention improvement, executive function support, and neuroprotection. The findings suggest a complex interplay between nutritional supplementation and cognitive health, with some supplements showing promising results and others displaying limited or context-dependent effectiveness. The review highlights the importance of dosage, bioavailability, and individual differences in response to supplementation. Additionally, it addresses safety concerns and potential interactions with conventional treatments. By providing a clear overview of current scientific knowledge, this review aims to guide healthcare professionals and researchers in making informed decisions about the use of nutritional supplements for cognitive health.
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- 2023
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30. Spectrally tunable ultrashort monochromatized extreme ultraviolet pulses at 100 kHz
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Tamás Csizmadia, Zoltán Filus, Tímea Grósz, Peng Ye, Lénárd Gulyás Oldal, Massimo De Marco, Péter Jójárt, Imre Seres, Zsolt Bengery, Barnabás Gilicze, Matteo Lucchini, Mauro Nisoli, Fabio Frassetto, Fabio Samparisi, Luca Poletto, Katalin Varjú, Subhendu Kahaly, and Balázs Major
- Subjects
Applied optics. Photonics ,TA1501-1820 - Abstract
We present the experimental realization of spectrally tunable, ultrashort, quasi-monochromatic extreme ultraviolet (XUV) pulses generated at 100 kHz repetition rate in a user-oriented gas high harmonic generation beamline of the Extreme Light Infrastructure—Attosecond Light Pulse Source facility. Versatile spectral and temporal shaping of the XUV pulses is accomplished with a double-grating, time-delay compensated monochromator accommodating the two composing stages in a novel, asymmetrical geometry. This configuration supports the achievement of high monochromatic XUV flux (2.8 ± 0.9 × 1010 photons/s at 39.7 eV selected with 700 meV full width at half maximum bandwidth) combined with ultrashort pulse duration (4.0 ± 0.2 fs using 12.1 ± 0.6 fs driving pulses) and small spot size (sub-100 µm). Focusability, spectral bandwidth, and overall photon flux of the produced radiation were investigated, covering a wide range of instrumental configurations. Moreover, complete temporal (intensity and phase) characterization of the few-femtosecond monochromatic XUV pulses—a goal that is difficult to achieve by conventional reconstruction techniques—has been realized using a ptychographic algorithm on experimentally recorded XUV-infrared pump–probe traces. The presented results contribute to in situ, time-resolved experiments, accessing direct information on the electronic structure dynamics of novel target materials.
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- 2023
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31. Stellaria media tea protects against diabetes-induced cardiac dysfunction in rats without affecting glucose tolerance
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Virág Demján, Andrea Sója, Tivadar Kiss, Alexandra Fejes, Flóra Diána Gausz, Gergő Szűcs, Andrea Siska, Imre Földesi, Roland Tengölics, Zsuzsanna Darula, Dezső Csupor, Márton Pipicz, and Tamás Csont
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Diabetic co-morbidity ,Prevention ,Medicinal herb ,Flavonoid ,Signal transducer and activator of transcription 3 ,Medicine - Abstract
Background and aim: Common chickweed (Stellaria media) tea has traditionally been applied for treatment of various metabolic diseases including diabetes in folk medicine; however, experimental evidence to support this practice is lacking. Therefore, we aimed to assess the effect of Stellaria media tea on glucose homeostasis and cardiac performance in a rat model of diabetes. Experimental procedure: Hot water extract of Stellaria media herb were analyzed and used in this study, where diabetes was induced by fructose-enriched diet supplemented with a single injection of streptozotocin. Half of the animals received Stellaria media tea (100 mg/kg) by oral gavage. At the end of the 20-week experimental period, blood samples were collected and isolated working heart perfusions were performed. Results and conclusion: Compared to the animals receiving standard chow, serum fasting glucose level was increased and glucose tolerance was diminished in diabetic rats. Stellaria media tea did not affect significantly fasting hyperglycemia and glucose intolerance; however, it attenuated diabetes-induced deterioration of cardiac output and cardiac work. Analysis of the chemical composition of Stellaria media tea suggested the presence of rutin and various apigenin glycosides which have been reported to alleviate diabetic cardiomyopathy. Moreover, Stellaria media prevented diabetes-induced increase in cardiac STAT3 phosphorylation. We demonstrated for the first time that Stellaria media tea may beneficially affect cardiac dysfunction induced by diabetes without improvement of glucose homeostasis. Rutin and/or apigenin glycosides as well as modulation of STAT3 signaling may be implicated in the protection of Stellaria media tea against diabetic cardiomyopathy.
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- 2022
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32. Assessing Fatigue Life Cycles of Material X10CrMoVNb9-1 through a Combination of Experimental and Finite Element Analysis
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Mohammad Ridzwan Bin Abd Rahim, Siegfried Schmauder, Yupiter H. P. Manurung, Peter Binkele, Ján Dusza, Tamás Csanádi, Meor Iqram Meor Ahmad, Muhd Faiz Mat, and Kiarash Jamali Dogahe
- Subjects
X10CrMoVNb9-1 (P91) ,two-scale material modeling (TSMM) ,Tanaka–Mura model (TMM) ,Paris law ,fatigue life cycles ,Mining engineering. Metallurgy ,TN1-997 - Abstract
This paper uses a two-scale material modeling approach to investigate fatigue crack initiation and propagation of the material X10CrMoVNb9-1 (P91) under cyclic loading at room temperature. The Voronoi tessellation method was implemented to generate an artificial microstructure model at the microstructure level, and then, the finite element (FE) method was applied to identify different stress distributions. The stress distributions for multiple artificial microstructures was analyzed by using the physically based Tanaka–Mura model to estimate the number of cycles for crack initiation. Considering the prediction of macro-scale and long-term crack formation, the Paris law was utilized in this research. Experimental work on fatigue life with this material was performed, and good agreement was found with the results obtained in FE modeling. The number of cycles for fatigue crack propagation attains up to a maximum of 40% of the final fatigue lifetime with a typical value of 15% in many cases. This physically based two-scale technique significantly advances fatigue research, particularly in power plants, and paves the way for rapid and low-cost virtual material analysis and fatigue resistance analysis in the context of environmental fatigue applications.
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- 2023
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33. The Possible Role of Food and Diet in the Quality of Life in Patients with COPD—A State-of-the-Art Review
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Mónika Fekete, Tamás Csípő, Vince Fazekas-Pongor, Madarász Bálint, Zoltán Csizmadia, Stefano Tarantini, and János Tamás Varga
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chronic obstructive pulmonary disease ,nutritional intervention ,protein ,omega-3 polyunsaturated fatty acids ,randomized controlled trial ,Nutrition. Foods and food supply ,TX341-641 - Abstract
Diet has been described as a modifiable risk factor for the development and progression of chronic diseases, and emerging evidence increasingly points to its preventive and therapeutic role in chronic obstructive pulmonary disease (COPD). While the relationship between the underlying disease and diet is natural in conditions such as metabolic disorders, obesity, diabetes, etc., the direct effect is not so evident in chronic obstructive pulmonary disease. Poor diet quality and the development of nutrient deficiencies in respiratory diseases, including COPD, can be associated with disease-specific factors such as the exacerbation of respiratory symptoms. These symptoms can be improved by dietary interventions, leading to positive changes in the pathogenesis of the disease and the quality of life of patients. Therefore, our aim was to review the latest randomized controlled trials (RCTs) of dietary interventions in chronic respiratory patients and describe their effects on respiratory function, physical activity, systemic inflammatory parameters, and quality of life. We conducted a literature search on dietary interventions for COPD patients in the PubMed, ClinicalTrials.gov, and Cochrane Central Register of Controlled Trials (CENTRAL) databases, focusing on publications from 1 July 2018 to 1 July 2023. We used specific keywords and MESH terms, focusing on RCTs. A total of 26 articles and 1811 COPD patients were included in this review. On the basis of our findings, dietary interventions, in particular components of the Mediterranean diet such as protein, omega-3 polyunsaturated fatty acids, and vegetables, appear to have beneficial effects in patients with chronic respiratory diseases, and their application is beneficial. However, long-term follow-up studies are still needed to examine the effects of dietary interventions in this patient population.
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- 2023
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34. Exercise training worsens cardiac performance in males but does not change ejection fraction and improves hypertrophy in females in a mouse model of metabolic syndrome
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Melinda E. Tóth, Márta Sárközy, Gergő Szűcs, Brigitta Dukay, Petra Hajdu, Ágnes Zvara, László G. Puskás, Gábor J. Szebeni, Zsófia Ruppert, Csaba Csonka, Ferenc Kovács, András Kriston, Péter Horváth, Bence Kővári, Gábor Cserni, Tamás Csont, and Miklós Sántha
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Metabolic syndrome ,Hyperlipidemia ,Obesity ,Endoplasmic reticulum stress ,Sex-based differences ,Endurance training ,Medicine ,Physiology ,QP1-981 - Abstract
Highlights 1. Both HFD/APOB-100 males and females developed obesity and hypercholesterolemia; however, only males presented insulin resistance. Exercise training did not change these metabolic parameters significantly. 2. HFD/APOB-100 males showed echocardiographic signs of mild heart failure with thinner walls and dilated ventricles, whereas females developed a starting left ventricular hypertrophy assessed by echocardiography and histology. 3. In response to exercise training, SD/WT males developed increased left ventricular volumes, and females presented physiologic hypertrophy. 4. Exercise-trained HFD/APOB-100 males presented worsening heart failure with reduced ejection fraction. On the contrary, exercise-trained HFD/APOB-100 females reversed the echocardiographic signs of left ventricular hypertrophy. 5. Sex, metabolic syndrome, and exercise training alter the gene expression pattern of the myocardium, which may be involved in the development of sex-specific cardiac alterations in the state of metabolic syndrome or to exercise training.
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- 2022
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35. Investigation of the effects of bovine collagen peptides and mixed berries on rheological properties and biological activity of egg white-based beverage via central composite design
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Adrienn Varga-Tóth, Csaba Németh, István Dalmadi, Tamás Csurka, Renáta Csorba, Majd Elayan, Munkhnasan Enkhbold, Karina Hidas, and László Ferenc Friedrich
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egg white ,dairy replacement ,functional food ,central composite design - response surface methodology ,bioactive compounds ,bovine collagen peptides ,Nutrition. Foods and food supply ,TX341-641 - Abstract
Modern consumer expectations have become highly diversified: they want more opportunities to meet diverse family needs (diversity of family members in age, gender, physical activity, etc. ,) and individual health goals with a huge variety of sensorial preferences. Our research is aimed to develop a protein-dense, highly bioactive, lactose- and whey protein-free beverage applying a central composite rotational design (CCRD) with 2 factors. For this purpose, an egg white-based beverage was flavored with mixed berries (factor A) and enriched with bovine collagen peptides (factor B). After suitable sample preparation, the rheological properties were investigated by an Anton Paar MCR 92 rheometer (with CC 27 system, and flow behavior was analyzed with a Herschel-Bulkley (H-B) model). The antioxidant capacity of samples was investigated by Ferric Reducing Antioxidant Power (FRAP) method, the total anthocyanin content was estimated based on a spectrophotometric method, and the total phenolic content was determined by the Folin Ciocalteu method. Our results are figured on response surfaces demonstrating that both factors and their interactions show a positive correlation with the examined parameters. Based on the CCRD, all investigated parameters are significantly influenced by at least one aspect and can be adequately estimated for further product development.
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- 2023
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36. Osteopontin levels are associated with late-time lower regional brain volumes in multiple sclerosis
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Gergely Orsi, Zsofia Hayden, Tamas Cseh, Timea Berki, and Zsolt Illes
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Medicine ,Science - Abstract
Abstract Osteopontin (OPN) is a proinflammatory marker produced by systemic immune and central nervous system (CNS) resident cells. We examined, if the level of OPN in the cerebrospinal fluid (CSF) and blood is associated with late-time regional brain volumes and white matter (WM) lesion load in MS. Concentrations of OPN in blood and CSF were related to MRI findings 10.1 ± 2.0 years later in 46 patients with MS. OPN concentration was measured by ELISA, while regional brain volumes and lesion load was assessed by magnetic resonance imaging (MRI) using 3D MPRAGE sequence and automated MR volumetry. OPN measured in the CSF was associated with several regional brain volumes and WM lesion load measured 10.1 ± 2.0 years later. CSF OPN concentration correlated with long-term enlargement of lateral- and inferior lateral ventricles and the elevation of gross CSF volume, in conjunction with the reduction of several cortical/subcortical gray matter and WM volumes. Serum OPN showed no long-term association with regional brain volumes. OPN measured from the CSF but not from the serum was associated with lower regional brain volumes measured a decade later, indicating the primary role of inflammation within the CNS in developing long-term brain related alterations.
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- 2021
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37. Sleep deprivation impairs cognitive performance, alters task-associated cerebral blood flow and decreases cortical neurovascular coupling-related hemodynamic responses
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Tamas Csipo, Agnes Lipecz, Cameron Owens, Peter Mukli, Jonathan W. Perry, Stefano Tarantini, Priya Balasubramanian, Ádám Nyúl-Tóth, Valeriya Yabluchanska, Farzaneh A. Sorond, J. Mikhail Kellawan, György Purebl, William E. Sonntag, Anna Csiszar, Zoltan Ungvari, and Andriy Yabluchanskiy
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Medicine ,Science - Abstract
Abstract Sleep deprivation (SD) is a common condition and an important health concern. In addition to metabolic and cardiovascular risks, SD associates with decreases in cognitive performance. Neurovascular coupling (NVC, "functional hyperemia") is a critical homeostatic mechanism, which maintains adequate blood supply to the brain during periods of intensive neuronal activity. To determine whether SD alters NVC responses and cognitive performance, cognitive and hemodynamic NVC assessments were conducted prior to and 24 h post-SD in healthy young male individuals (n = 10, 27 ± 3 years old). Cognition was evaluated with a battery of tests from the Cambridge Neuropsychological Test Automated Battery (CANTAB). Hemodynamic components of NVC were measured by transcranial Doppler sonography (TCD) during cognitive stimulation, dynamic retinal vessel analysis (DVA) during flicker light stimulation, and functional near infrared spectroscopy (fNIRS) during finger tapping motor task. Cognitive assessments revealed impairments in reaction time and sustained attention after 24 h of SD. Functional NIRS analysis revealed that SD significantly altered hemodynamic responses in the prefrontal cortex and somatosensory cortex during a motor task. NVC-related vascular responses measured by DVA and TCD did not change significantly. Interestingly, TCD detected decreased task-associated cerebral blood flow (CBF) in the right middle cerebral artery in sleep deprived participants. Our results demonstrate that 24 h of SD lead to impairments in cognitive performance together with altered CBF and hemodynamic components of cortical NVC responses.
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- 2021
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38. Ischemic preconditioning protects the heart against ischemia-reperfusion injury in chronic kidney disease in both males and females
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Márta Sárközy, Fanni Magdolna Márványkövi, Gergő Szűcs, Zsuzsanna Z. A. Kovács, Márton R. Szabó, Renáta Gáspár, Andrea Siska, Bence Kővári, Gábor Cserni, Imre Földesi, and Tamás Csont
- Subjects
Uremic cardiomyopathy ,Cardioprotection ,Left ventricular hypertrophy and fibrosis ,Diastolic dysfunction ,Chronic renal failure ,Ischemic preconditioning ,Medicine ,Physiology ,QP1-981 - Abstract
Highlights 1. There was no difference in the severity of chronic kidney disease (CKD) between male and female rats based on serum urea and creatinine levels as well as creatinine clearance. 2. As compared to females, males developed a more severe uremic cardiomyopathy characterized by left ventricular hypertrophy and fibrosis in CKD based on echocardiography and histology. 3. Following ischemia/reperfusion, infarct size was significantly smaller in females than in males, both in the sham-operated and CKD groups. 4. The infarct size-limiting effect of ischemic preconditioning (IPRE) was preserved in both sexes in CKD despite the more severe uremic cardiomyopathy in male CKD rats. 5. IPRE significantly increased the phospho-STAT3/STAT3 ratio in sham-operated, but not in CKD animals in both sexes.
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- 2021
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39. A comparison of microsatellites and genome‐wide SNPs for the detection of admixture brings the first molecular evidence for hybridization between Mustela eversmanii and M. putorius (Mustelidae, Carnivora)
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Lajos Szatmári, Tamás Cserkész, Levente Laczkó, József Lanszki, Cino Pertoldi, Alexei V. Abramov, Morten Elmeros, Barnabás Ottlecz, Zsolt Hegyeli, and Gábor Sramkó
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admixture ,backcrossing ,conservation genomics ,F1 hybrid ,genetic diversity ,RADseq ,Evolution ,QH359-425 - Abstract
Abstract Introgressive hybridization can pose a serious threat to endangered species which have an overlapping distribution such as in the case of two polecat species, Mustela eversmanii and M. putorius, in Europe. The population size of steppe polecat is known to continuously shrink, whereas its sister species, the European polecat, is still somehow widespread. In this study, we perform an analysis using microsatellite (SSR) and genomic (SNP) data sets to identify natural hybrids between polecats. Four populations were genotyped for eight polymorphic SSR loci, and thousands of unlinked SNPs were generated using a reduced‐representation sequencing approach, RADseq, to characterize the genetic make‐up of allopatric populations and to identify hybrids in the sympatric area. We applied standard population genetic analyses to characterize the populations based on their SSR allelic frequency. Only a single sample out of 48 sympatric samples showed exact intermediacy that we identified as an F1 hybrid. Additionally, one specimen was indicated in the genomic data sets as backcrossed. Other backcrosses, indicated by SSRs, were not validated by SNPs, which highlights the higher efficacy of the genomic method to identify backcrossed individuals. The low frequency of hybridization suggests that the difference in habitat preference of the two species may act as a barrier to admixture. Therefore, it is apparently unlikely that polecat populations are threatened by significant introgression. The two species showed a clear genetic differentiation using both techniques. We found higher genetic diversity values in the sympatric steppe polecat population than in the other studies on polecat populations. Although M. putorius is a hunted species in most countries, genetic diversity values indicate worse conditions in Europe than in the protected sibling species M. eversmanii. Suspending hunting and providing protected status of the former seems to be reasonable and timely.
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- 2021
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40. Comparison of the antiremodeling effects of losartan and mirabegron in a rat model of uremic cardiomyopathy
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Zsuzsanna Z. A. Kovács, Gergő Szűcs, Marah Freiwan, Mónika G. Kovács, Fanni M. Márványkövi, Hoa Dinh, Andrea Siska, Katalin Farkas, Ferenc Kovács, András Kriston, Péter Horváth, Bence Kővári, Bálint Gábor Cserni, Gábor Cserni, Imre Földesi, Tamás Csont, and Márta Sárközy
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Medicine ,Science - Abstract
Abstract Uremic cardiomyopathy is characterized by diastolic dysfunction (DD), left ventricular hypertrophy (LVH), and fibrosis. Angiotensin-II plays a major role in the development of uremic cardiomyopathy via nitro-oxidative and inflammatory mechanisms. In heart failure, the beta-3 adrenergic receptor (β3-AR) is up-regulated and coupled to endothelial nitric oxide synthase (eNOS)-mediated pathways, exerting antiremodeling effects. We aimed to compare the antiremodeling effects of the angiotensin-II receptor blocker losartan and the β3-AR agonist mirabegron in uremic cardiomyopathy. Chronic kidney disease (CKD) was induced by 5/6th nephrectomy in male Wistar rats. Five weeks later, rats were randomized into four groups: (1) sham-operated, (2) CKD, (3) losartan-treated (10 mg/kg/day) CKD, and (4) mirabegron-treated (10 mg/kg/day) CKD groups. At week 13, echocardiographic, histologic, laboratory, qRT-PCR, and Western blot measurements proved the development of uremic cardiomyopathy with DD, LVH, fibrosis, inflammation, and reduced eNOS levels, which were significantly ameliorated by losartan. However, mirabegron showed a tendency to decrease DD and fibrosis; but eNOS expression remained reduced. In uremic cardiomyopathy, β3-AR, sarcoplasmic reticulum ATPase (SERCA), and phospholamban levels did not change irrespective of treatments. Mirabegron reduced the angiotensin-II receptor 1 expression in uremic cardiomyopathy that might explain its mild antiremodeling effects despite the unchanged expression of the β3-AR.
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- 2021
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41. Az egyháztörténet-írás 'új útjai' az 1930-as években
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Tamás Csíki
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egyháztörténet ,historiográfia ,1930-as évek ,Religion (General) ,BL1-50 - Abstract
A tanulmány az 1930-as évek egyháztörténet-írását vizsgálja. A teológusok és a "laikus" történetírók részvételével zajló, a diszciplína helyzetére fókuszáló vitákat mutatja be, melyek a teológiai és a történeti tudás, illetve a vallásos hit és a tudományos megismerés kapcsolatának problematikáját is reflektálták. Utal a studium állandó jelzőinek ("katolikus" és "protestáns") használatára és jelentéseire, majd a Magyar Katolikus Történetírók Munkaközössége áltak kiadott Regnum című folyóirat pályájuk elején álló szerzőinek tanulmányaival azt szemlélteti, hogy a szellemtörténet, a népiségtörténet, valamint a társadalomtudományos történetírás milyen tematikai és módszertani lehetőségeket kínált a megújuló egyháztörténet számára.
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- 2022
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42. Gait variability predicts cognitive impairment in older adults with subclinical cerebral small vessel disease
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Peter Mukli, Sam Detwiler, Cameron D. Owens, Tamas Csipo, Agnes Lipecz, Camila Bonin Pinto, Stefano Tarantini, Adam Nyul-Toth, Priya Balasubramanian, Jordan R. Hoffmeister, Anna Csiszar, Zoltan Ungvari, Angelia C. Kirkpatrick, Calin I. Prodan, and Andriy Yabluchanskiy
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cerebral small vessel disease ,gait variability ,white matter hyperintensities ,gait ,cognitive dysfunction ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
IntroductionAdvanced methods of gait research, including approaches to quantify variability, and orderliness/regularity/predictability, are increasingly used to identify patients at risk for the development of cognitive impairment. Cerebral small vessel disease (CSVD) is highly prevalent in older adults and is known to contribute to the development of vascular cognitive impairment and dementia (VCID). Studies in preclinical models demonstrate that subclinical alterations precede CSVD-related cognitive impairment in gait coordination. In humans, CSVD also associates with gait abnormalities. The present study was designed to test the hypothesis that increased gait variability and gait asymmetry predict a decline in cognitive performance in older adults with CSVD.MethodsTo test this hypothesis, we compared cognitive performance and gait function in patients with CSVD (age: 69.8 ± 5.3 years; n = 11) and age- and sex-matched control participants (age: 70.7 ± 5.8 years; n = 11). Based on imaging findings, patients with CSVD were identified [presence of white matter hyperintensities plus silent brain infarcts and/or microhemorrhages on magnetic resonance imaging (MRI) assessment]. Cognitive performance was assessed using the Cambridge Neuropsychological Test Automated Battery (CANTAB). Gait parameters were measured during the single and dual tasks, during which participants, in addition to the motor task, completed a series of mental arithmetic calculations. Spatial and temporal parameters of gait variability, symmetry, and permutation entropy were determined using a pressure-sensitive gait mat during single and dual cognitive task conditions.ResultsPatients with CSVD exhibited lower performance in a visual learning test (p = 0.030) and in a sustained attention test (p = 0.007). CSVD also affected step time variability (p = 0.009) and step length variability (p = 0.017). Step lengths of CSVD participants were more asymmetric (p = 0.043) than that of controls, while the two groups were statistically similar regarding step time symmetry and entropy of step time and length. Gait variability was inversely associated with sustained attention, especially among CSVD patients, and this relationship was significantly different between the two groups. The association of sustained attention with gait symmetry was also significantly different between the two groups.DiscussionOur findings provide additional evidence in support of the concept that increased gait variability and asymmetry may predict cognitive impairment in older adults with CSVD.
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- 2022
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43. Ecdysone receptor isoform specific regulation of secretory granule acidification in the larval Drosophila salivary gland
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Anikó Nagy, Győző Szenci, Attila Boda, Muna Al-Lami, Tamás Csizmadia, Péter Lőrincz, Gábor Juhász, and Péter Lőw
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EcR ,EcR-B1 ,Usp ,Salivary gland ,Granule maturation ,Vha55 ,Cytology ,QH573-671 - Abstract
Bulk production and release of glue containing secretory granules takes place in the larval salivary gland during Drosophila development in order to attach the metamorphosing animal to a dry surface. These granules undergo a maturation process to prepare glue for exocytosis, which includes homotypic fusions to increase the size of granules, vesicle acidification and ion uptake. The steroid hormone 20-hydroxyecdysone is known to be required for the first and last steps of this process: glue synthesis and secretion, respectively. Here we show that the B1 isoform of Ecdysone receptor (EcR), together with its binding partner Ultraspiracle, are also necessary for the maturation of glue granules by promoting their acidification via regulation of Vha55 expression, which encodes an essential subunit of the V-ATPase proton pump. This is antagonized by the EcR-A isoform, overexpression of which decreases EcR-B1 and Vha55 expression and glue granule acidification. Our data shed light on a previously unknown, ecdysone receptor isoform-specific regulation of glue granule maturation.
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- 2022
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44. Targeting histone methylation to reprogram the transcriptional state that drives survival of drug-tolerant myeloid leukemia persisters
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Noortje van Gils, Han J.M.P. Verhagen, Michaël Broux, Tania Martiáñez, Fedor Denkers, Eline Vermue, Arjo Rutten, Tamás Csikós, Sofie Demeyer, Meryem Çil, Marjon Al, Jan Cools, Jeroen J.W.M. Janssen, Gert J. Ossenkoppele, Renee X. Menezes, and Linda Smit
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Therapy ,Molecular biology ,Cancer ,Science - Abstract
Summary: Although chemotherapy induces complete remission in the majority of acute myeloid leukemia (AML) patients, many face a relapse. This relapse is caused by survival of chemotherapy-resistant leukemia (stem) cells (measurable residual disease; MRD). Here, we demonstrate that the anthracycline doxorubicin epigenetically reprograms leukemia cells by inducing histone 3 lysine 27 (H3K27) and H3K4 tri-methylation. Within a doxorubicin-sensitive leukemia cell population, we identified a subpopulation of reversible anthracycline-tolerant cells (ATCs) with leukemic stem cell (LSC) features lacking doxorubicin-induced H3K27me3 or H3K4me3 upregulation. These ATCs have a distinct transcriptional landscape than the leukemia bulk and could be eradicated by KDM6 inhibition. In primary AML, reprogramming the transcriptional state by targeting KDM6 reduced MRD load and survival of LSCs residing within MRD, and enhanced chemotherapy response in vivo. Our results reveal plasticity of anthracycline resistance in AML cells and highlight the potential of transcriptional reprogramming by epigenetic-based therapeutics to target chemotherapy-resistant AML cells.
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- 2022
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45. Lévy α-Stable Model for the Non-Exponential Low-|t| Proton–Proton Differential Cross-Section
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Tamás Csörgő, Sándor Hegyi, and István Szanyi
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elastic scattering ,proton-proton ,scattering amplitude ,Elementary particle physics ,QC793-793.5 - Abstract
It is known that the Real Extended Bialas–Bzdak (ReBB) model describes the proton–proton (pp) and proton–antiproton (pp¯) differential cross-section data in a statistically non-excludible way, i.e., with a confidence level greater than or equal to 0.1% in the center of mass energy range 546 GeV ≤s≤8 TeV and in the squared four-momentum transfer range 0.37 GeV2 ≤ −t ≤ 1.2 GeV2. Considering, instead of Gaussian, a more general Lévy α-stable shape for the parton distributions of the constituent quark and diquark inside the proton and for the relative separation between them, a generalized description of data is obtained, where the ReBB model corresponds to the α=2 special case. Extending the model to α<2, we conjecture that the validity of the model can be extended to a wider kinematic range, in particular, to lower values of the four-momentum transfer −t. We present the formal Lévy α-stable generalization of the Bialas–Bzdak model and show that a simplified version of this model can be successfully fitted, with α<2, to the non-exponential, low −t differential cross-section data of elastic proton–proton scattering at s=8 TeV.
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- 2023
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46. The Effectiveness of Supplementation with Key Vitamins, Minerals, Antioxidants and Specific Nutritional Supplements in COPD—A Review
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Mónika Fekete, Tamás Csípő, Vince Fazekas-Pongor, Ágnes Fehér, Zsófia Szarvas, Csilla Kaposvári, Krisztián Horváth, Andrea Lehoczki, Stefano Tarantini, and János Tamás Varga
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COPD ,vitamins ,minerals ,antioxidants ,omega-3 ,Nutrition. Foods and food supply ,TX341-641 - Abstract
Currently, an increasing amount of evidence supports the notion that vitamins C, D and E, carotenoids, and omega-3 fatty acids may protect against the progression of chronic respiratory diseases. Although chronic obstructive pulmonary disease (COPD) primarily affects the lung, it is often accompanied by extrapulmonary manifestations such as weight loss and malnutrition, skeletal muscle dysfunction, and an excess of harmful oxidants, which can lead to a decline in quality of life and possible death. Recently, the role of various vitamins, minerals, and antioxidants in mitigating the effects of environmental pollution and smoking has received significant attention. Therefore, this review evaluates the most relevant and up-to-date evidence on this topic. We conducted a literature review between 15 May 2018 and 15 May 2023, using the electronic database PubMed. Our search keywords included COPD, chronic obstructive pulmonary disease, FEV1, supplementation: vitamin A, vitamin D, vitamin E, vitamin C, vitamin B, omega-3, minerals, antioxidants, specific nutrient supplementations, clinical trials, and randomized controlled trials (RCTs). We focused on studies that measured the serum levels of vitamins, as these are a more objective measure than patient self-reports. Our findings suggest that the role of appropriate dietary supplements needs to be reconsidered for individuals who are predisposed to or at risk of these conditions.
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- 2023
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47. Relationship between Some Myostatin Variants and Meat Production Related Calving, Weaning and Muscularity Traits in Charolais Cattle
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Tamás Csürhés, Ferenc Szabó, Gabriella Holló, Edit Mikó, Márton Török, and Szabolcs Bene
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myostatin alleles ,Q204X ,F94L ,muscularity scores ,calving and weaning traits ,Veterinary medicine ,SF600-1100 ,Zoology ,QL1-991 - Abstract
The slaughter value of live cattle can be assessed during visual conformation scoring, as well as by examining different molecular genetic information, e.g., the myostatin gene, which can be responsible for muscle development. In this study, the F94L, Q204X, nt267, nt324 and nt414 alleles of the myostatin gene (MSTN) were examined in relation to birth weight (BIW), calving ease (CAE), 205-day weaning weight (CWW), muscle score of shoulder (MSS), muscle score of back (MSB), muscle score of thigh (MST), roundness score of thigh (RST), loin thickness score (LTS), and overall muscle development percentage (OMP) of Charolais weaned calves in Hungary. Multi-trait analysis of variance (GLM) and weighted linear regression analysis were used to process the data. Calves carrying the Q204X allele in the heterozygous form achieved approximately 0.14 points higher MSB, MST and LTS, and 1.2% higher OMP, and gained 8.56 kg more CWW than their counterparts not carrying the allele (p < 0.05). As for the F94L allele, there was a difference of 4.08 kg in CWW of the heterozygous animals, but this difference could not be proved statistically. The other alleles had no significant effect on the evaluated traits.
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- 2023
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48. Comparison of techno-functional and sensory properties of sponge cakes made with egg powder and different quality of powdered blood products for substituting egg allergen and developing functional food
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Tamás Csurka, Adrienn Varga-Tóth, Dorottya Kühn, Géza Hitka, Katalin Badak-Kerti, Boglárka Alpár, József Surányi, László Ferenc Friedrich, and Klára Pásztor-Huszár
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animal blood ,by-product ,functional food ,iron ,iron deficiency anemia ,sensory properties ,Nutrition. Foods and food supply ,TX341-641 - Abstract
Animal blood is a valuable resource, which is usually not utilized in a value-added way by the industry like other animal by-products, even though it has plenty of benefits in terms of sustainability and human health, particularly against iron deficiency anemia. Animal blood is perfectly suitable for providing special functions, which are necessary for functional foods, and improving techno-functional properties based on the previous reports published in the literature. In this paper, egg powder was substituted by powdered animal blood products (whole blood powder, blood plasma powder, and hemoglobin powder) in sponge cake. Techno-functional and sensory properties (texture by texture profile analysis and three-point breaking test, water activity, dry matter content, and color) were instrumentally measured and then a sensory evaluation was carried out by unskilled panelists. Quality characteristics (texture, color, and dry matter content) were daily measured on the day of baking and then every 24 h for 3 additional days because freshly baked cakes are usually consumed within 3 days. Based on the results, powdered blood products are suitable for substituting the egg powder in sponge cakes and developing functional foods. Blood powders can increase the hardness, chewiness, and breaking force of cakes, giving them the ability to be stuffed with more fillings and molded into special shapes without compromising on the sensory characteristics. They can also increase the intensity of the cocoa flavor, which results in a richer, darker color without deceiving the consumers.
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- 2022
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49. Facile isolation and analysis of sporopollenin exine from bee pollen
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Kristóf Hegedüs, Csaba Fehér, István Jalsovszky, Zoltán Kristóf, János Rohonczy, Elemér Vass, Attila Farkas, Tamás Csizmadia, Gernot Friedbacher, and Peter Hantz
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Medicine ,Science - Abstract
Abstract We present facile methods to obtain purified sporopollenin exine capsules, and provide mass balances for classical and novel purification procedures. An ionic liquid, tetrabutyl phosphonium hydroxide turned out to be the most effective in removing the intine wall. The sporopollenin capsules were investigated by fluorescent microscopy, AFM, solid-state NMR and infrared Raman spectroscopy. The latter two methods showed that sunflower and rape exines have different proportions of O-aliphatic and aromatic constituents. Purified exine capsules were coated with functionalized fluorophores. The procedures presented in this paper could contribute to further spread of the applications of this hollow, and chemically highly resistant material.
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- 2021
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50. Probing Serum Albumins and Cyclodextrins as Binders of the Mycotoxin Metabolites Alternariol-3-Glucoside, Alternariol-9-Monomethylether-3-Glucoside, and Zearalenone-14-Glucuronide
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Miklós Poór, Beáta Lemli, Péter Vilmányi, Ágnes Dombi, Zoltán Nagymihály, Eszter Borbála Both, Nándor Lambert, Tamás Czömpöly, and Lajos Szente
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alternariol glucosides ,zearalenone glucuronide ,serum albumins ,cyclodextrins ,mycotoxin binders ,Microbiology ,QR1-502 - Abstract
Mycotoxins are toxic metabolites of molds. Chronic exposure to alternariol, zearalenone, and their metabolites may cause the development of endocrine-disrupting and carcinogenic effects. Alternariol-3-glucoside (AG) and alternariol-9-monomethylether-3-glucoside (AMG) are masked derivatives of alternariol. Furthermore, in mammals, zearalenone-14-glucuronide (Z14Glr) is one of the most dominant metabolites of zearalenone. In this study, we examined serum albumins and cyclodextrins (CDs) as potential binders of AG, AMG, and Z14Glr. The most important results/conclusions were as follows: AG and AMG formed moderately strong complexes with human, bovine, porcine, and rat albumins. Rat albumin bound Z14Glr approximately 4.5-fold stronger than human albumin. AG–albumin and Z14Glr–albumin interactions were barely influenced by the environmental pH, while the formation of AMG–albumin complexes was strongly favored by alkaline conditions. Among the mycotoxin–CD complexes examined, AMG–sugammadex interaction proved to be the most stable. CD bead polymers decreased the mycotoxin content of aqueous solutions, with moderate removal of AG and AMG, while weak extraction of Z14Glr was observed. In conclusion, rat albumin is a relatively strong binder of Z14Glr, and albumin can form highly stable complexes with AMG at pH 8.5. Therefore, albumins can be considered as affinity proteins with regard to the latter mycotoxin metabolites.
- Published
- 2023
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