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Therapeutic proteasome inhibition in experimental acute pancreatitis

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World Journal of Gastroenterology 2007年第33期13卷 4452-4457页

作者： Tamás Letoha Liliána Z Fehér László Pecze csaba Somlai Ilona Varga József Kaszaki Gábor Tóth csaba Vizler László Tiszlavicz Tamás Takács Department of Medical Chemistry University of Szeged H-6720 Szeged Hungary Institute of Biochemistry Biological Research Center of the HungarianAcademy of Sciences H-6726 Szeged Hungary Department of Genetics and Molecular Biology University of Szeged H-6726 Szeged Hungary Institute of Surgical Research University of Szeged H-6720 Szeged Hungary Department of Pathology University of Szeged H-6720 Szeged Hungary First Department of Medicine University of Szeged H-6720 Szeged Hungary

AIM： To establish the therapeutic potential of proteasome inhibition, we examined the therapeutic effects of MG132 （Z-Leu-Leu-Leu-aldehyde） in an experimental model of acute pancreatitis. METHODS： Pancreatitis was induced in rats by two hourly intraperitoneal （ip） injections of cholecystokinin octapeptide （CCK; 2×100μg/kg） and the proteasome inhibitor MG132 （10 mg/kg ip） was administered 30 min after the second CCK injection. Animals were sacrificed 4 h after the first injection of CCK. RESULTS： Administering the proteasome inhibitor MG132 （at a dose of 10 mg/kg, ip） 90 min after the onset of pancreatic inflammation induced the expression of cell-protective 72 kDa heat shock protein （HSP72） and decreased DNA-binding of nuclear factor-κB （NF-κB）. Furthermore MG132 treatment resulted in milder inflammatory response and cellular damage, as revealed by improved laboratory and histological parameters of pancreatitis and associated oxidative stress. CONCLUSION： Our findings suggest that proteasome inhibition might be beneficial not only for the prevention, but also for the therapy of acute pancreatitis.

关键词： Acute pancreatitis Cholecystokinin octapeptide Proteasome inhibition Nuclear factor-κB Heat shock proteins

Immunobiology of congenital cytomegalovirus infection of the central nervous system--the murine cytomegalovirus model

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Cellular & Molecular Immunology 2015年第2期12卷 180-191页

作者： Irena Slavuljica Daria Kvestak Peter csaba Huszthy Kate Kosmac William J Britt Stipan Jonjic Department of Histology and Embryology School of Medicine University of Rijeka Rijeka Croatia Department of Infectious Diseases School of Medicine University of Rijeka Rijeka Croatia Department of Immunology Institute of Clinical Medicine University of Oslo Oslo Norway Department of Microbiology University of Alabama at Birmingham Birmingham AL USA

Congenital human cytomegalovirus infection is a leading infectious cause of long-term neurodevelopmental sequelae, including mental retardation and hearing defects. Strict species specificity of cytomegaloviruses has restricted the scope of studies of cytomegalovirus infection in animal models. To investigate the pathogenesis of congenital human cytomegalovirus infection, we developed a mouse cytomegalovirus model that recapitulates the major characteristics of central nervous system infection in human infants, including the route of neuroinvasion and neuropathological findings. Following intraperitoneal inoculation of newborn animals with mouse cytomegalovirus, the virus disseminates to the central nervous system during high-level viremia and replicates in the brain parenchyma, resulting in a focal but widespread, non-necrotizing encephalitis. Central nervous system infection is coupled with the recruitment of resident and peripheral immune cells as well as the expression of a large number of pro-inflammatory cytokines. Although infiltration of cellular constituents of the innate immune response characterizes the early immune response in the central nervous system, resolution of productive infection requires virus-specific CD8＋ T cells. Perinatal mouse cytomegalovirus infection results in profoundly altered postnatal development of the mouse central nervous system and long-term motor and sensory disabilities. Based on an enhanced understanding of the pathogenesis of this infection, prospects for novel intervention strategies aimed to improve the outcome of congenital human cytomegalovirus infection are proposed.

关键词： central nervous system congenital infection cytomegalovirus immune response

Clinical significance of granuloma in Crohn's disease

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World Journal of Gastroenterology 2005年第20期11卷 3118-3121页

作者： Tamás Molnár László Tiszlavicz csaba Gyulai Ferenc Nagy János Lonovics First Department of Medicine Faculty of Medicine University of Szeged H-6720 Szeged Korányi fasor 8. Hungary Department of Pathology Faculty of Medicine University of Szeged H-6720 Szeged Korányi fasor 8. Hungary Department of Radiology Faculty of Medicine University of Szeged H-6720 Szeged Korányi fasor 8. Hungary

AIM: Granuloma is considered the hallmark of microscopic diagnosis in Crohn's disease (CD), but granulomas can be detected in only 21-60% of CD patients. The aim of this study was to evaluate the frequency of granulomas by multiple endoscopic biopsies in patients with CD and to examine whether group of patients with or without granuloma exhibit a different clinical course. METHODS: Fifty-six patients with newly diagnosed CD were included in the study. Jejunoscopy, enteroclysis and ileo-colonoscopy were performed in all patients. At least two biopsy specimens from each examined gastrointestinal segment were examined microscopically searching granuloma. The clinical course was followed in all patients, and extraintestinal manifestations as well as details of any immunosuppressive therapy and surgical intervention were noted. RESULTS: Granuloma was found in 44.6% of the cases (25 patients). Patients with granuloma had higher activity parameters at the time of the biopsies. Extraintestinal manifestations were observed and surgical interventions were performed more often in the granuloma group. The need of immunosuppressive therapy was significantly more frequent in the patients with granuloma. Granuloma formation is mote often seen in younger patients, and mainly in the severe, active penetrating disease. CONCLUSION: The significantly higher frequency of surgical interventions and immunosuppressive therapy suggests that granuloma formation is associated with a more severe disease course during the first years of CD.

关键词： Crohn's disease Granuloma Activity Complication

Doubled Haploid Production Using an Improved Anther Culture Protocol for Sorghum[Sorghum bicolor(L.)Moench]

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Phyton-International Journal of Experimental Botany 2021年第2期90卷 475-487页

作者： Paul Chege Erzsébet Kiss csaba Lantos Andrea Palágyi János Pauk Cereal Research Non-profit Ltd. Alsókikötősor 9Szeged6726Hungary Doctoral School of Plant Science Szent István UniversityGödöllőH2103Hungary

Sorghum[Sorghum bicolor(L.)Moench]can benefit from accelerated breeding and release of improved varieties through doubled haploid *** technology has been used in speeding up the breeding of other major cereals such as wheat,maize and rice,for which generally widely applied optimised protocols exist.A reproducible protocol for the crop,that can overcome genotype dependency and other species-specific challenges such as phenolic exudation is however *** study aimed at sorghum doubled haploids production thereby contributing to the development of an improved *** the 28 hybrid genotypes,both F1 registered-and experimental hybrids involved,this study successfully produced haploids from five genotypes and subsequently,four confirmed doubled-haploid lines on W14mf medium or its modification with 1.0 gl^(-1)L-proline,1.0 gl^(-1)L-asparagine and 1.0 gl^(-1)KH_(2)PO_(4).Medium 190-2Cu was used for regeneration and rooting,which occurred successfully,if the calli were transferred on to it less than 7 days after induction,and temperature was maintained at 25°C under light *** dependency was not wholly overcome;however,sorghum’s high tillering ability and abiotic stress tolerance were observed to contribute to attainment of haploid *** diploids producing seeds at rates of upto 80.5%were obtained,therefore eliminating the need for colchicine duplication.

关键词： In vitro androgenesis doubled-haploid sorghum anther-culture breeding

Infrared neural stimulation and inhibition using an implantable silicon photonic microdevice

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Microsystems & Nanoengineering 2020年第1期6卷 939-950页

作者： Agoston csaba Horvath Sandor Borbely Ors Csanad Boros Lili Komaromi Pal Koppa Peter Bartho Zoltan Fekete Research Group for Implantable Microsystems Faculty of Information Technology&BionicsPazmany Peter Catholic UniversityBudapestHungary Microsystems Laboratory Institute for Technical Physics&Material ScienceCentre for Energy ResearchBudapestHungary Obuda University Doctoral School on Materials Sciences and Technologies BudapestHungary MTA TTK NAP Sleep Oscillations Research Group BudapestHungary Department of Physiology and Neurobiology Eotvos Lorand UniversityBudapestHungary Department of Atomic Physics Budapest University of Technology&EconomicsBudapestHungary

Brain is one of the most temperature sensitive *** the fundamental role of temperature in cellular metabolism,thermal response of neuronal populations is also significant during the evolution of various neurodegenerative *** such critical environmental factor,thorough mapping of cellular response to variations in temperature is desired in the living *** far,limited efforts have been made to create complex devices that are able to modulate temperature,and concurrently record multiple features of the stimulated *** our work,the in vivo application of a multimodal photonic neural probe is ***,thermal,and electrophysiological functions are monolithically integrated in a single *** system facilitates spatial and temporal control of temperature distribution at high precision in the deep brain tissue through an embedded infrared waveguide,while it provides recording of the artefact-free electrical response of individual cells at multiple locations along the probe *** distribution of the optically induced temperature changes is evaluated through in vitro measurements and a validated multi-physical *** operation of the multimodal microdevice is demonstrated in the rat neocortex and in the hippocampus to increase or suppress firing rate of stimulated neurons in a reversible manner using continuous wave infrared light(λ=1550 nm).Our approach is envisioned to be a promising candidate as an advanced experimental toolset to reveal thermally evoked responses in the deep neural tissue.

关键词： stimulation metabolism organs

A cop1 spa Mutant Deficient in COP1 and SPA Proteins Reveals Partial Co-Action of COP1 and SPA during Arabidopsis Post-Embryonic Development and Photomorphogenesis

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Molecular Plant 2015年第3期8卷 479-481页

作者： Natalia Ordonez-Herrera Petra Fackendahl Xu Yu Sabine Schaefer csaba Koncz Ute Hoecker Botanical Institute and Cluster of Excellence on Plant Sciences (CEPLAS) Biocenter University of Cologne Zülpicher Strasse 47b 50674 Cologne Germany Max Planck Institute for Plant Breeding Research Carl-von-Linné Weg 10 50829 Cologne Germany Institute of Plant Biology Biological Research Center of Hungarian Academy of Sciences Temesvari krt. 62 H-6726 Szeged Hungary

Dear Editor,The Arabidopsis CONSTITUTIVELY PHOTOMORPHOGENIC1/ SUPPRESSOR OF PHYA-105 （COP1/SPA） complex is a key repressor of light signaling that inhibits light responses in dark- ness. It acts as an E3 ubiquitin ligase, which ubiquitinates posi- tively acting light-signaling intermediates, mainly transcription factors, thereby targeting them for proteolytic degradation by the 26S proteasome. In the light, photoreceptors directly interact with the COP1/SPA complex, leading to its inactivation, which subsequently allows the target transcription factors to accumu- late and initiate vast reprogramming of gene expression （Huang et al., 2014）.

关键词： COP1 SPA 蛋白质拟南芥光形态建成胚胎发育突变体 26S蛋白酶体

Preparation and application of highly porous aerogel-based bioactive materials in dentistry

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Frontiers of Materials Science 2014年第1期8卷 46-52页

作者： Andrea KUTTOR Melinda SZALOKI TLinde RENTE Farkas KERENYI Jozsef BAKO Istvan FABIAN Istvan LAZAR Attila JENEI csaba HEGEDUES Department of Prosthetic Dentistry and Biomaterials Faculty of Dentistry University of Debrecen 4012 Debrecen Hungary Aerogel Research Group Department of Inorganic and Analytical Chemistry Faculty of Science University of Debrecen 4010 Debrecen Hungary Department of Dental Biochemistry Faculty of Dentistry University of Debrecen 4012 Debrecen Hungary Department of Biophysics and Cell Biology Faculty of Medicine University of Debrecen 4012 Debrecen Hungary

In this study, the possibility of preparation and application of highly porous silica aerogel-based bioactive materials are presented. The aerogel was combined with hydroxyapatite and *** phosphate as bioactive and osteoinductive agents. The porosity of aerogels was in themesoporous region with a maximum pore diameter of 7,4 and 12.7 nm for the composite materials. The newly developed bioactive materials were characterized by scant electron microscopy. The in vitro biological effect of these modified surfaces was also tested on SAOS-2 osteogenic sarcoma cells by confocal laser scanning microscopy.

关键词： aerogel sol-gel technique bioactive matedal SAOS-2 cell

Problems with classification of spa waters used in balneology

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Health 2010年第11期2卷 1260-1263页

作者： csaba Varga 不详

Recently, several measurements have indicated the presence of biologically active organic micropollutants or trace components in different types of waters, including spa and medicinal waters. The wide spectrum and abundance of organic components of spa waters in the Carpathian basin and other European regions has been demonstrated by gas-chromatographic analyses. These components may have main role in the therapeutic and preventive mechanisms. Considering the new analytical data, traditional European classification of spa waters based on the quality and quantity of inorganic ions (salts) should be reevaluated. The association of inorganic components and the therapeutic effects is also necessary to reconsider.

关键词： Spa Water Medicinal Water Classification Organic Compounds Balneotherapy Prevention

Peeling off the surface: Pt-decoration of WSe 2 nanoflakes results in exceptional photoelectrochemical HER activity

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SusMat 2022年第6期2卷 749-760页

作者： Peter S.Toth Gabor Szabo Gabor Bencsik Gergely F.Samu Krishnan Rajeshwar csaba Janaky Department of Physical Chemistry and Materials Science Interdisciplinary Excellence CenterUniversity of SzegedSzegedHungary Department of Chemistry and Biochemistry The University of Texas at ArlingtonArlingtonTexasUSA

Photoelectrochemical(PEC)hydrogen evolution reaction(HER)was studied on exfoliated,pristine and Pt-decorated tungsten diselenide(p-WSe_(2))nanoflake samples,using a previously developed microdroplet PEC microscopy *** WSe 2 nanoflakes had well-defined thicknesses as measured by atomic force microscopy,and the Pt nanoparticles(NPs)were deposited by a variable num-ber of atomic layer deposition(ALD)*** exceptionally high photocurrent density of 49.6 mA cm^(−2)(under 220 mW cm^(−2) irradiation)and internal-photon-to-electron-conversion efficiency(∼90%at 550 nm)were demonstrated on these Pt-decorated WSe_(2)(WSe_(2)-Pt)*** Pt NP loading and thickness of WSe_(2) nanoflakes(in the 24–235 nm range)were used to fine-tune their PEC activity for *** found similar charge transfer and surface recombination kinetics of pristine and WSe_(2)-Pt specimens(as assessed by intensity-modulated photocurrent spectroscopy),which indicated significant differences in their bulk properties.X-ray and ultraviolet photoelectron spectroscopies were performed to identify defect states and quantify the density of states around the valence band of WSe_(2).The elevated temperature of the ALD process and the evolving Pt NP phase conspired to passivate the sub-surface(i.e.,bulk)defects in the WSe_(2) nanoflakes,resulting in their vastly improved PEC performance.

关键词： atomic layer deposition defect migration density of states hydrogen evolution layered semiconductor photoelectrochemical kinetics