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| 1 | Interplay between nitric oxide and VIP in CCK-8-induced phasic contractile activity in the rabbit sphincter of Oddi显示文摘AIM: The sphincter of Oddi (SO) plays an important role in delivery of bile into the duodenum. To establish whether vasoactive intestinal polypeptide (VIP) and nitric oxide (NO) were involved in phasic contractile activity of the rabbit SO stimulated by cholecystokinin-octapeptide (CCK-8).METHODS: Isolated SO muscle rings were cleaned of fat and mounted horizontally on two small L-shaped hooksone of which was connected to a force transducer for the measurement of isometric tension. The experiments were carried out in a thermostatically controlled (37±0.2℃)organ bath (5 mL) containing Krebs solution. The organ fluid was gassed with 95% O2 and 50 mL/L CO2 to keep the pH at 7.40±0.05. Contractile responses to CCK-8 (1μmol/L) were evaluated in the presence and absence of N^G-nitro-L-arginine (LNNA), an inhibitor of NO synthase (100μmol/L), and (p-chloro-D-Phe^6-Leu^17)-VIP (VIPa,30μmol/L), a VIP receptor antagonist.RESULTS: CCK-8 stimulated the phasic activity of the SO.NO synthase inhibition increased the frequency and amplitude of contractions with a slight increase in developed tension.Pre-incubation with VIPa also attenuated this CCK-8 effect.The combined application of LNNA and VIPa abolished the phasic activity of the muscle rings with a marked increase in tension in response to CCK-8.CONCLUSION: VIP and NO together contribute to an increase in phasic activity of SO. | Attila Pálv(o|¨)lgyi Réka Sári József Németh Annamária Szabolcs István Nagy Péter Hegyi János Lonovics Zoltán Szilvássy | 2005 | World Journal of Gastroenterology2005，11，21： | 11 |
| 2 | CYP24A1 inhibition facilitates the anti-tumor effect of vitamin D3 on colorectal cancer cells显示文摘AIM:The effects of vitamin D3 have been investigated on various tumors, including colorectal cancer (CRC). 25-hydroxyvitamin-D3-24-hydroxylase (CYP24A1), the enzyme that inactivates the active vitamin D3 metabolite 1,25-dihydroxyvitamin D3 (1,25-D3), is considered to be the main enzyme determining the biological halflife of 1,25-D3. During colorectal carcinogenesis, the expression and concentration of CYP24A1 increases significantly, suggesting that this phenomenon could be responsible for the proposed efficacy of 1,25-D3 in the treatment of CRC. The aim of this study was to investigate the anti-tumor effects of vitamin D3 on the human CRC cell line Caco-2 after inhibition of the cytochrome P450 component of CYP24A1 activity. METHODS:We examined the expression of CYP24A1 mRNA and the effects of 1,25-D3 on the cell line Caco-2 after inhibition of CYP24A1. Cell viability and proliferation were determined by means of sulforhodamine-B staining and bromodeoxyuridine incorporation, respectively, while cytotoxicity was estimated via the lactate dehydrogenase content of the cell culture supernatant. CYP24A1 expression was measured by realtime reverse transcription polymerase chain reaction. A number of tetralone compounds were synthesized to investigate their CP24A1 inhibitory activity. RESULTS:In response to 1,25-D3, CYP24A1 mRNA expression was enhanced significantly, in a time- and dose-dependent manner. Caco-2 cell viability and proliferation were not influenced by the administration of 1,25-D3 alone, but were markedly reduced by coadministration of 1,25-D3 and KD-35, a CYP24A1-inhibiting tetralone. Our data suggest that the mechanism of action of co-administered KD-35 and 1,25-D3 does not involve a direct cytotoxic effect, but rather the inhibition of cell proliferation. CONCLUSION:These findings demonstrate that the selective inhibition of CYP24A1 by compounds such as KD-35 may be a new approach for enhancement of the anti-tumor effect of 1,25-D3 on CRC. | János P Kósa Péter Horváth János Wlfling Dóra Kovács Bernadett Balla Péter Mátyus Evelin Horváth Gábor Speer István Takács Zsolt Nagy Henrik Horváth Péter Lakatos | 2013 | World Journal of Gastroenterology2013，19，17： | 5 |
| 3 | Alleviated mucosal and neuronal damage in a rat model of Crohn's disease显示文摘AIM:To establish a rat model suitable to investigate the repetitive relapsing inflammations(RRI)characteristic to Crohn’s disease.METHODS:Colitis was induced by 2,4,6-trinitrobenzenesulfonic acid(TNBS).RRI were mimicked by repeating administrations of TNBS.Tissue samples were taken from control,once,twice and three times treated rats from the inflamed and adjacent non-inflamed colonic segments at different timepoints during the acute intestinal inflammation.The means of the ulcerated area were measured to evaluate the macroscopic mu-cosal damage.The density of myenteric neurons was determined on whole mounts by Hu C/Hu D immunohistochemistry.Heme oxygenase-1(HO-1)expression was evaluated by molecular biological techniques.RESULTS:TNBS-treated rats displayed severe colitis,but the mortality was negligible,and an increase of body weight was characteristic throughout the experimental period.The widespread loss of myenteric neurons,and marked but transient HO-1 up-regulation were demonstrated after the first TNBS administration.After repeated doses the length of the recovery time and extent of the ulcerous colonic segments were markedly decreased,and the neuronal loss was on a smaller scale and was limited to the inflamed area.HO-1 m RNA level was notably greater than after a single dose and overexpression was sustained throughout the timepoints examined.Nevertheless,the HO-1protein up-regulation after the second TNBS treatment proved to be transient.Following the third treatment HO-1 protein expression could not be detected.CONCLUSION:Experimentally provoked RRI may exert a protective preconditioning effect against the mucosal and neuronal damage.The persistent up-regulation of HO-1 m RNA expression may correlate with this. | Petra Talapka Lajos István Nagy Alexandra Pál Marietta Zita Poles Anikó Berkó Mária Bagyánszki László Géza Puskás éva Fekete Nikolett Bódi | 2014 | World Journal of Gastroenterology2014，20，44： | 3 |
| 4 | Structural and molecular features of intestinal strictures in rats with Crohn's-like disease显示文摘AIM: To develop a new rat model we wanted to gain a better understanding of stricture formation in Crohn's disease(CD).METHODS: Chronic colitis was induced locally by the administration of 2,4,6-trinitrobenzenesulfonic acid(TNBS). The relapsing inflammation characteristic to CD was mimicked by repeated TNBS treatments. Animals were randomly divided into control, once, twice and three times TNBS-treated groups. Control animals received an enema of saline. Tissue samples were taken from the strictured colonic segments and also adjacent proximally and distally to its 60, 90 or 120 d after the last TNBS or saline administrations. The frequency and macroscopic extent of the strictures were measured on digital photographs. The structural features of strictured gut wall were studied by light- and electron microscopy. Inflammation related alterations in TGF-beta 2 and 3, matrix metalloproteinases 9(MMP9) and TIMP1 m RNA and protein expression were determined by quantitative real-time PCR and western blot analysis. The quantitative distribution of caspase 9 was determined by post-embedding immunohistochemistry.RESULTS: Intestinal strictures first appeared 60 d after TNBS treatments and the frequency of them increased up to day 120. From day 90 an intact lamina epithelialis, reversible thickening of lamina muscularis mucosae and irreversible thickening of the muscularis externa were demonstrated in the strictured colonic segments. Nevertheless the morphological signs of apoptosis were frequently seen and excess extracellular matrix deposition was recorded between smooth muscle cells(SMCs). Enhanced caspase 9 expression on day 90 in the SMCs and on day 120 also in myenteric neurons indicated the induction of apoptosis. The m RNA expression profile of TGF-betas after repeated TNBS doses was characteristic to CD, TGF-beta 2, but not TGF-beta 3 was up-regulated. Overexpression of MMP9 and down-regulation of TIMP1 were demonstrated. The progressive increase in the amount of MMP9 protein in the strictures was also obvious between days 90 and 120 but TIMP1 protein was practically undetectable at this time.CONCLUSION: These findings indicate that aligned structural and molecular changes in the gut wall rather than neuronal cell death play the primary role in stricture formation. | Petra Talapka Anikó Berkó Lajos István Nagy Lalitha Chandrakumar Mária Bagyánszki László Géza Puskás éva Fekete Nikolett Bódi | 2016 | World Journal of Gastroenterology2016，22，22： | 3 |
| 5 | Frequency and prognostic role of mucosal healing in patients with Crohn's disease and ulcerative colitis after one-year of biological therapy显示文摘AIM:To assess the endoscopic activity before and after a one-year period of biological therapy and to evaluate the frequency of relapses and need for retreatment after stopping the biologicals in patients with Crohn’s disease(CD)and ulcerative colitis(UC).METHODS:The data from 41 patients with CD and 22 patients with UC were assessed.Twenty-four CD patients received infliximab,and 17 received adalimumab.The endoscopic severity of CD was quantified with the simplified endoscopic activity score for Crohn’s disease in CD and with the Mayo endoscopic subscore in UC.RESULTS:Mucosal healing was achieved in 23 CD and7 UC patients.Biological therapy had to be restarted in78%of patients achieving complete mucosal healing with CD and in 100%of patients with UC.Neither clinical remission nor mucosal healing was associated with the time to restarting the biological therapy in either CD or UC.CONCLUSION:Mucosal healing did not predict sustained clinical remission in patients in whom the biological therapies had been stopped. | Klaudia Farkas Péter László Lakatos Mónika Szcs va Pallagi-Kunstár Anita Bálint Ferenc Nagy Zoltán Szepes Noémi Vass Lajos S Kiss Tibor Wittmann Tamás Molnár | 2014 | World Journal of Gastroenterology2014，20，11： | 2 |
| 6 | Efficacy of 6-mercaptopurine treatment after azathioprine hypersensitivity in inflammatory bowel disease显示文摘AIM:To investigate the efficacy of 6-mercaptopurine (6-MP) in cases of azathioprine (AZA) hypersensitivity in patients with inflammatory bowel disease. METHODS: Twenty nine previously confirmed Crohn’s disease (CD) (n = 14) and ulcerative colitis (UC) (n = 15) patients with a known previous (AZA) hypersensitivity reaction were studied prospectively. The 6-MP doses were gradually increased from 0.5 up to 1.0-1.5 mg/kg per day. Clinical activity indicies (CDAI/CAI), laboratory variables and daily doses of oral 5-ASA, corticosteroids, and 6-MP were assessed before and in the first, sixth and twelfth months of treatment. RESULTS: In 9 patients, 6-MP was withdrawn in the first 2 wk due to an early hypersensitivity reaction. Medication was ineffective within 6 mo in 6 CD patients, and myelotoxic reaction was observed in two. Data were evaluated at the end of the sixth month in 12 (8 UC, 4 CD) patients, and after the first year in 9 (6 UC, 3 CD) patients. CDAI decreased transiently at the end of the sixth month, but no significant changes were observed in the CDAI or the CAI values at the end of the year. Leukocyte counts (P = 0.01), CRP (P = 0.02), and serum iron (P = 0.05) values indicated decreased inflammatory reactions, especially in the UC patients at the end of the year, making the possibility to taper oral steroid doses. CONCLUSION: About one-third of the previously AZA- intolerant patients showed adverse effects on taking 6MP. In our series, 20 patients tolerated 6MP, but it was ineffective in 8 CD cases, and valuable mainly in ulcerative colitis patients. | Ferenc Nagy Tamás Molnár Zoltán Szepes Klaudia Farkas Tibor Nyári János Lonovics | 2008 | World Journal of Gastroenterology2008，14，27： | 2 |
| 7 | Relationship between diabetes mellitus and cataract in Hungary显示文摘AIM:To examine the coexistence of diabetes mellitus(DM)and cataract in Hungary.The effects of DM on the cataract surgical results were also in the focus of analysis.METHODS:Statistical data analysis of the results of the Rapid Assessment of Avoidable Blindness with Diabetic Retinopathy(RAAB+DR)module conducted in Hungary in 2015.This cross-sectional,population-based,national survey included 3523 people aged 50 years and over.Participants of the survey were examined on-site.Visual acuity,main cause for visual impairment(using direct and indirect ophthalmoscopes),in case of best corrected visual acuity(BCVA)≤0.5 and blood glucose level(random test with glucometer)were examined.RESULTS:The prevalence of cataract was 23.4%,and DM was 20.0%.The occurrence of cataract steadily increased with age.Among the examined participants with DM,the prevalence of cataract was significantly(P=0.012)higher(+35%)than that in non-diabetic subjects(29.5%vs 21.8%).Following aging(OR=15.2%,P<0.001),DM proved to be the most independent influencing risk factor(OR=49.9%,P<0.001).The presence of DM was neither an influencing factor for complications of cataract surgery,nor for postoperative visual acuity.CONCLUSION:DM appears to be one of the main risk factors for developing cataract.Other risk factors,such as age,sex and environment also play an influencing role.Diabetes does not seem to affect the occurrence of cataract surgical complications. | Anita Pék Dorottya Szabó Gábor LászlóSándor Gábor Tóth András Papp Zoltán Zsolt Nagy Hans Limburg János Németh | 2020 | International Journal of Ophthalmology(English edition)2020，13，5： | 2 |
| 8 | Risks and Predictors of Blood Transfusion in Pediatric Patients Undergoing Open Heart Operations显示文摘 | Andrea Székely Zsuzsanna Cserép Erzsébet Sápi Tamás Breuer Csaba A. Nagy Péter Vargha István Hartyánszky András Szatmári András Treszl | 2009 | The Annals of Thoracic Surgery2009，，1： | 2 |
| 9 | A Short Amino-Terminal Part of Arabidopsis Phytochrome A Induces Constitutive Photomorphogenic Response显示文摘Phytochrome A (phyA ) 是在 Arabidopsis thaliana 察觉到的 far-red 光的主导的光敏电阻器。phyA 在发信号的变白的幼苗,和导致光的 phyA 的细胞质在高水平积累被一个复杂规章的网络调停。这包括光 -- 并且进在 vivo 的原子核的本国的 phyA 的 FHY1/FHL 蛋白质依赖者 translocation。phyA (PHYA406 ) 的短 N 终端碎片对 phenocopy 足够,这也被显示出在 vitro 的这个高度调整的细胞的过程。为了测试这 N 终端的生物活动,在 planta phyA 碎裂,我们生产了表示 PHYA406YFP 的转基因的 phyA-201 植物(黄荧光灯蛋白质) DD, PHYA406YFPDDNLS (原子本地化信号) ,和 PHYA406YFPDDNES (原子出口信号) 熔化蛋白质。这里,我们报导 PHYA406YFPDD 被进口进原子核,而 PHYA406YFPDDNLS 和 PHYA406YFPDDNES 显示期望的组成的本地化模式,这进程部分是轻依赖者的。我们的结果证明这些截断的 phyA 蛋白质是轻马厩的,当局部性时,他们在他们的原子核,和两个都不触发组成的象 photomorphogenic 一样回答导致合适的 phyA 发信号。我们证明在 vitro 并且在 vivo PHYA406, Pfr 和 Pr 绑 COP1, photomorphogenesis 的一个一般抑压者,并且在原子身体与它共同本地化。因此,我们断定在 planta,截断的 PHYA406 蛋白质以一种光无关的方式在原子核使 COP1 失去活性。 | Andra's Viczia'n E'va Ada'm Iris Wolf Ja'nos Bindics Stefan Kircher Marc Heijde Roman Ulm Eberhard Scha'fer Ferenc Nagy | 2012 | Molecular Plant2012，5，3： | 2 |
| 10 | Tgf-beta3-induced palatal fusion is mediated by Alk-5/Smad pathway显示文摘 | DUDAS M NAGY A LAPING N J | 2004 | Dev Biol2004，266，1： | 1 |
| 11 | Esophageal tonsil: a novel gut-associated lymphoid organ显示文摘 | Olah I Nagy N Magyar A | 2003 | Poult Sci2003，82，5： | 1 |
| 12 | Evelopment and progression of malignancy in human colon tissues are correlated with expression of specific Ca(2+)-binding S100 proteins 显示文摘 | Bronckart Y Decaestecker C Nagy N | 2001 | Histol Histopathol2001，16，3： | 1 |
| 13 | Treatment of pituitary tumors显示文摘 | Gabriella Iván Nikoletta Szigeti-Csúcs Márk Oláh Cy?rgy M. Nagy Miklós I. Góth | 2005 | Endocrine2005，，1： | 1 |
| 14 | Refined prognostic evaluation in colon carcinoma using immunohistochemical galectin fingerprinting显示文摘 | Nagy N Legendre H Engels O | 2003 | Cancer2003，97，8： | 1 |
| 15 | S100A2, a putative tumor suppressor gene, regulates in vitro squamous cell carcinoma migration显示文摘 | Nagy N Brenner C Markadieu N | 2001 | Lab Invest2001，81，4： | 1 |
| 16 | Development and progression of malignancy in human colon tissues are correlated with expression of specific Ca^2+-binding S100 proteins显示文摘 | Bronckart Y Decaestecker C Nagy N | 2001 | Histol Histopathol2001，16，3： | 1 |
| 17 | Open reduction and internal fixation of volar Barton's fractures:a prospective study 显示文摘 | Aggarwal A K Nagi O N | 2004 | J Orthop Surg2004，12，2： | 1 |
| 18 | CTSC and Papillon-Leffevresyndrome: detection of recurrent mutations in Hungarian patients, areview of published variants and database update 显示文摘 | Nagy N Vdlyi P Csoma Z | 2014 | Mol GenetGenomic Med2014，2，3： | 1 |
| 19 | The anti-apoptotic protein G1P3 is overexpressed in psoriasis and regulated by the non-coding RNA,PRINS显示文摘 | Szegedi K Sonkoly E Nagy N | 2010 | Exp Dermatol2010，19，3： | 1 |
| 20 | Isolation of epsilon-haemoglobin-chain positive fetal cells with micromanipulation for prenatal diagnosis显示文摘 | Nagy GR Bán Z Sipos F | 2005 | Prenat Diagn2005，25，14： | 1 |
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