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Erdélyi-Percs É, Szabó D, Szilvási A, Dezsőfi A. Importance of donor-specific antibodies in the long-term outcome of liver-transplanted children. Orv Hetil 2021; 162:1897-1901. [PMID: 34801984 DOI: 10.1556/650.2021.32235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 05/09/2021] [Indexed: 11/19/2022]
Abstract
Összefoglaló. Bevezetés: A gyermekkori májtranszplantációk hosszú távú kimenetelének javítása érdekében az immunológiai mechanizmusok kerültek a kutatások középpontjába. A donorspecifikus antitesteknek (DSA-k) fontos szerepük van a graft túlélésében a szervtranszplantációk után, a májtranszplantáció esetén azonban ez még vitatott. Célkitűzés: Tanulmányunk célja májtranszplantált gyermekeknél a DSA-k meghatározása, valamint a DSA-k jelenléte és a graft állapota közötti összefüggés vizsgálata volt. Módszer: A Semmelweis Egyetem I. Sz. Gyermekgyógyászati Klinikáján gondozott 54 májtranszplantált gyermek vérmintájából történt a humán leukocytaantigén (HLA) elleni antitestek meghatározása. Vizsgáltuk, hogy a laboratóriumi vérvizsgálat eredményei - szérumbilirubin (összes, direkt), alkalikus foszfatáz (ALP), transzaminázok, gamma-glutamil-transzferáz (GGT), immunglobulin-G (IgG) -, az aszpartát-aminotranszferáz/thrombocyta hányadosindex (APRI) és a 4 tényezőn alapuló fibrosisindex (FIB4) tekintetében van-e eltérés a DSA-pozitív, illetve a HLA-immunizált betegek esetén a nem immunizált csoporthoz képest. Eredmények: A vizsgált paraméterekben nem találtunk szignifikáns különbségeket a DSA-pozitív, a HLA-immunizált és a nem immunizált betegek csoportjai között. Következtetés: Bár a jelen vizsgálatban nem volt szignifikáns különbség a vizsgált paraméterek esetén, de ez a kis esetszámból is adódhat. A DSA-knak a graftfibrosis kialakulásában való szerepe tisztázására több páciens vizsgálata szükséges, ezért megkezdtük az összes páciensnél a DSA- és HLA- (donor, recipiens) meghatározást, valamint ennek a klinikai gyakorlatunkba való beépítését. Orv Hetil. 2021; 162(47): 1897-1901. SUMMARY INTRODUCTION To improve the long-term survival of liver-transplanted children, immunological mechanisms became the main interest of researchers. Donor-specific antibodies (DSAs) play a significant role in graft survival after solid organ transplantation, although their role in liver transplantation is controversial. OBJECTIVE The aim of our study was to determine the presence of DSAs in liver-transplanted children and to examine their effect on graft's condition. METHOD The determination of anti-human leukocyte antigen (HLA) antibodies was performed using the blood samples of 54 liver-transplanted children. We analysed the difference between the results of the laboratory blood examination - serum bilirubin (all, direct), alkaline-phosphatase (ALP), transaminases, gamma-glutamyl transferase (GGT), immunoglobulin-G (IgG) -, aspartate aminotransferase to platelet ratio index (APRI) and fibrosis-4 index (FIB4) according to DSA and HLA immunization. RESULTS We did not find any significant difference in the examined parameters regarding DSA and HLA immunization. CONCLUSION Although this study was not able to provide significant difference in the examined parameters, this can be explained with the low number of cases. To clarify the significance of DSA in graft fibrosis, we need a larger dataset. We started regular DSA and HLA (donor and recipient) determination during follow-up in liver-transplanted children. Orv Hetil. 2021; 162(47): 1897-1901.
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Affiliation(s)
- Éva Erdélyi-Percs
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, I. Gyermekgyógyászati Klinika, Budapest, Bókay János u. 53-54., 1083
| | - Dolóresz Szabó
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, I. Gyermekgyógyászati Klinika, Budapest, Bókay János u. 53-54., 1083
| | - Anikó Szilvási
- 2 Országos Vérellátó Szolgálat, Transzplantációs Immungenetikai Laboratórium, Budapest
| | - Antal Dezsőfi
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, I. Gyermekgyógyászati Klinika, Budapest, Bókay János u. 53-54., 1083
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Abstract
Paediatric organ transplantation today is considered and accepted and widely available therapy in children with end-stage organ failure. It is important to know that in childhood, diseases leading to end-stage organ failure differ from those in adults. Beside this, in children there are different surgical and paediatric challenges before and after transplantation (size differences of the patient and donor organ, special and paediatric infections, different pharmacokinetics and pharmacodynamics of immunosuppressive drugs, noncompliance). However, paediatric organ transplantation in the last decades became a success story of the Hungarian health care owing to several working groups in Hungary and outside the country. Orv Hetil. 2018; 159(46): 1948-1956.
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Affiliation(s)
- Antal Dezsőfi
- I. Gyermekgyógyászati Klinika, Semmelweis Egyetem, Általános Orvostudományi Kar Budapest, Bókay J. u. 53., 1083
| | - György Reusz
- I. Gyermekgyógyászati Klinika, Semmelweis Egyetem, Általános Orvostudományi Kar Budapest, Bókay J. u. 53., 1083
| | - Lajos Kovács
- I. Gyermekgyógyászati Klinika, Semmelweis Egyetem, Általános Orvostudományi Kar Budapest, Bókay J. u. 53., 1083
| | - Dolóresz Szabó
- I. Gyermekgyógyászati Klinika, Semmelweis Egyetem, Általános Orvostudományi Kar Budapest, Bókay J. u. 53., 1083
| | - Kata Kelen
- I. Gyermekgyógyászati Klinika, Semmelweis Egyetem, Általános Orvostudományi Kar Budapest, Bókay J. u. 53., 1083
| | - Dóra Krikovszky
- I. Gyermekgyógyászati Klinika, Semmelweis Egyetem, Általános Orvostudományi Kar Budapest, Bókay J. u. 53., 1083
| | - Anikó Malik
- I. Gyermekgyógyászati Klinika, Semmelweis Egyetem, Általános Orvostudományi Kar Budapest, Bókay J. u. 53., 1083
| | - Attila Szabó
- I. Gyermekgyógyászati Klinika, Semmelweis Egyetem, Általános Orvostudományi Kar Budapest, Bókay J. u. 53., 1083.,MTA-SE Gyermekgyógyászati és Nefrológiai Kutatócsoport Budapest
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Jerzsele Á, Karancsi Z, Pászti-Gere E, Sterczer Á, Bersényi A, Fodor K, Szabó D, Vajdovich P. Effects of p.o. administered xylitol in cats. J Vet Pharmacol Ther 2018; 41:409-414. [PMID: 29430681 DOI: 10.1111/jvp.12479] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Accepted: 10/30/2017] [Indexed: 01/02/2023]
Abstract
Xylitol is commonly used as sugar substitute in households. While it has numerous beneficial effects on human health, it is highly toxic to dogs. The goal of this study was to examine whether xylitol has similar deleterious effects, such as hypoglycaemia and acute hepatic failure, on cats. Our research included six healthy middle-aged cats. Xylitol was dissolved in deionized water and administered p.o. at three doses (100, 500 and 1,000 mg/kg body weight). These dosages have been considered toxic and can cause liver failure or even death in dogs. After every xylitol administration, the basic health status and the blood glucose of cats were observed regularly. Additionally, prior to and 6, 24 and 72 hr after xylitol administration, blood samples were taken to check complete blood count, clinical biochemical parameters and enzymes such as ALT, ALKP, GGT, GLDH, bile acids, BUN, creatinine, phosphate, total protein, albumin, sodium and potassium. There were no significant changes (p > .05) in any of the haematological or biochemical parameters. Blood glucose concentrations did not show any significant alterations, except at 1,000 mg/kg dose, where a mild but significant increase was observed, but it was in physiological range. Based on our results, xylitol did not induce toxic effects on cats.
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Affiliation(s)
- Á Jerzsele
- Department of Pharmacology and Toxicology, University of Veterinary Medicine, Budapest, Hungary
| | - Z Karancsi
- Department of Pharmacology and Toxicology, University of Veterinary Medicine, Budapest, Hungary
| | - E Pászti-Gere
- Department of Pharmacology and Toxicology, University of Veterinary Medicine, Budapest, Hungary
| | - Á Sterczer
- Department of Clinic of Internal Medicine, University of Veterinary Medicine, Budapest, Hungary
| | - A Bersényi
- Department of Animal Breeding, Nutrition and Laboratory Animal Science, University of Veterinary Medicine, Budapest, Hungary
| | - K Fodor
- Department of Veterinary Forensics, Law and Economics, University of Veterinary Medicine, Budapest, Hungary
| | - D Szabó
- Department of Pharmacology and Toxicology, University of Veterinary Medicine, Budapest, Hungary
| | - P Vajdovich
- Department of Clinical Pathology and Oncology, University of Veterinary Medicine, Budapest, Hungary
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Kozinszky Z, Devosa I, Fekete Z, Szabó D, Sikovanyecz J, Pásztor N, Keresztúri A. Knowledge of Emergency Contraceptive Pills among Hungarian Women Presenting for Induced Abortion or Seeking Emergency Contraception. Geburtshilfe Frauenheilkd 2016; 76:978-982. [PMID: 27681523 DOI: 10.1055/s-0042-105746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
Aim: To compare the differences in contraceptive characteristics and the knowledge of emergency contraception (ECP) among women who used ECP after unprotected intercourse and those who sought an abortion. Methods: A questionnaire survey was conducted in a Hungarian university hospital among women for whom ECP was prescribed after unprotected intercourse (n = 940) as well as women who presented for the termination of pregnancy (n = 1592) between January 1, 2005 and November 20, 2006. Their knowledge of ECP and their experience with and attitudes toward ECP use were targeted. Results: The availability of ECP was well known (87.9 %), but it was still greatly underutilized: applied by only 13 of the 1592 women who resorted to abortion. Primarily, the ECP group consisted of those who experienced a condom failure significantly more often (odds ratio [OR] = 4.1), followed by those cases where ECP applications was a consequence of not using any kind of contraception (OR = 3.8). Fewer than one third (32 %) of the abortion seekers had previously used ECP, and only one fifth knew how to obtain it. Appropriate awareness of ECP was influenced by information obtained from health-care providers (adjusted odds ratio [AOR] = 3.93) or school education (AOR = 1.82). Conclusions: More thorough education is needed to provide a deeper knowledge of ECP use during contraceptive counseling for women seeking abortion, including those contraceptive mishaps where unintended pregnancy can be prevented by ECP.
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Affiliation(s)
- Z Kozinszky
- Department of Obstetrics and Gynecology, Blekinge Hospital, Karlskrona, Sweden
| | - I Devosa
- College of Kecskemét, Teacher Training Faculty, Health Science and Health Promotion Research Group, Hungary, Kecskemét, Hungary
| | - Z Fekete
- Department of Obstetrics and Gynaecology, University of Szeged, Szeged, Hungary
| | - D Szabó
- Department of Obstetrics and Gynaecology, University of Szeged, Szeged, Hungary
| | - J Sikovanyecz
- Department of Obstetrics and Gynaecology, University of Szeged, Szeged, Hungary
| | - N Pásztor
- Department of Obstetrics and Gynaecology, University of Szeged, Szeged, Hungary
| | - A Keresztúri
- Department of Obstetrics and Gynaecology, University of Szeged, Szeged, Hungary
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Andics A, Gábor A, Gácsi M, Faragó T, Szabó D, Miklósi Á. Neural mechanisms for lexical processing in dogs. Science 2016; 353:1030-1032. [PMID: 27576923 DOI: 10.1126/science.aaf3777] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 07/28/2016] [Indexed: 11/02/2022]
Abstract
During speech processing, human listeners can separately analyze lexical and intonational cues to arrive at a unified representation of communicative content. The evolution of this capacity can be best investigated by comparative studies. Using functional magnetic resonance imaging, we explored whether and how dog brains segregate and integrate lexical and intonational information. We found a left-hemisphere bias for processing meaningful words, independently of intonation; a right auditory brain region for distinguishing intonationally marked and unmarked words; and increased activity in primary reward regions only when both lexical and intonational information were consistent with praise. Neural mechanisms to separately analyze and integrate word meaning and intonation in dogs suggest that this capacity can evolve in the absence of language.
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Affiliation(s)
- A Andics
- MTA-ELTE Comparative Ethology Research Group, Eötvös Loránd University, H-1117 Budapest, Pázmány Páter sátány 1/C, Hungary. Department of Ethology, Eötvös Loránd University, H-1117 Budapest, Pázmány Páter sátány 1/C, Hungary. MR Research Centre, Semmelweis University, H-1083 Budapest, Balassa u. 6, Hungary.
| | - A Gábor
- Department of Ethology, Eötvös Loránd University, H-1117 Budapest, Pázmány Páter sátány 1/C, Hungary
| | - M Gácsi
- MTA-ELTE Comparative Ethology Research Group, Eötvös Loránd University, H-1117 Budapest, Pázmány Páter sátány 1/C, Hungary
| | - T Faragó
- MTA-ELTE Comparative Ethology Research Group, Eötvös Loránd University, H-1117 Budapest, Pázmány Páter sátány 1/C, Hungary
| | - D Szabó
- MTA-ELTE Comparative Ethology Research Group, Eötvös Loránd University, H-1117 Budapest, Pázmány Páter sátány 1/C, Hungary. Department of Ethology, Eötvös Loránd University, H-1117 Budapest, Pázmány Páter sátány 1/C, Hungary
| | - Á Miklósi
- MTA-ELTE Comparative Ethology Research Group, Eötvös Loránd University, H-1117 Budapest, Pázmány Páter sátány 1/C, Hungary. Department of Ethology, Eötvös Loránd University, H-1117 Budapest, Pázmány Páter sátány 1/C, Hungary
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Béres NJ, Szabó D, Kocsis D, Szűcs D, Kiss Z, Müller KE, Lendvai G, Kiss A, Arató A, Sziksz E, Vannay Á, Szabó AJ, Veres G. Role of Altered Expression of miR-146a, miR-155, and miR-122 in Pediatric Patients with Inflammatory Bowel Disease. Inflamm Bowel Dis 2016; 22:327-35. [PMID: 26752469 DOI: 10.1097/mib.0000000000000687] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Evidence suggests the central role of tumor necrosis factor (TNF)-α in the pathomechanism of inflammatory bowel disease (IBD); however, its effect on epigenetic factors, including small non-coding microRNAs (miRs), is less known. Our present aim was the comparative investigation of the expression of TNF-α and immune response-related miRs in children with Crohn's disease (CD) and ulcerative colitis (UC). METHODS Fresh-frozen (FF) and formalin-fixed, paraffin-embedded (FFPE) biopsies were used to analyze the expression of miR-146a, -155, -122, and TNF-α by real-time reverse transcription polymerase chain reaction in macroscopically inflamed (CD: 12 FFPE and 24 FF; UC: 10 FF) and intact (CD: 12 FFPE; 14 FF) colonic biopsies of children with IBD and controls (16 FFPE; 23 FF). The expression of miR-146a, -155, and -122 was also determined in TNF-α-treated HT-29 colonic epithelial cells. RESULTS Increased expression of TNF-α was observed in the colonic mucosa of children with CD and UC in comparison with controls. Expression of miR-146a and -155 was higher in the inflamed mucosa of children with CD and UC than in the intact mucosa. Expression of miR-122 elevated in the macroscopically intact colonic regions of CD compared with controls and patients with UC. In HT-29 cells, TNF-α treatment increased the expression of miR-146a and -155, but not that of miR-122. CONCLUSIONS Our results showed altered expression of miR-146a, -155, and -122 in the colonic mucosa of children with IBD and in TNF-α-treated colonic epithelial cells. Our data suggest the TNF-α-related involvement of these miRs in the pathogenesis of IBD.
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Affiliation(s)
- Nóra J Béres
- *1st Department of Pediatrics, Semmelweis University, Budapest, Hungary; †2nd Department of Internal Medicine, Semmelweis University, Budapest, Hungary; ‡Department of Pediatrics and Pediatric Health Care Center, University of Szeged, Szeged, Hungary; §2nd Department of Pathology, Semmelweis University, Budapest, Hungary; ‖MTA-SE, Tumor Progression Research Group, Budapest, Hungary; and ¶MTA-SE, Pediatrics and Nephrology Research Group, Budapest, Hungary
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Szabó D, Hosszú É, Arató A, Müller KE, Béres N, Lakatos PL, Papp M, Dezsőfi A, Szabó AJ, Szűcs D, Veres G. Seasonal variability of vitamin D and bone metabolism in infliximab-treated paediatric Crohn's disease. Dig Liver Dis 2015; 47:652-7. [PMID: 26074152 DOI: 10.1016/j.dld.2015.05.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 04/26/2015] [Accepted: 05/01/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND Paediatric Crohn's disease patients suffer from several complications, including low bone mineral density and inadequate serum levels of 25-hydroxy vitamin D. AIMS The aim of this prospective study was to address the effect of infliximab therapy on bone metabolism, bone mineral density and vitamin D homeostasis. The seasonal variability of serum vitamin D levels in relation to infliximab treatment was also analysed. METHODS Serum osteocalcin and beta-crosslaps (markers of bone metabolism), seasonal variability of vitamin D, and bone mineral density were assessed and followed throughout the yearlong treatment regimen of infliximab in 50 consecutive paediatric patients with moderate to severe Crohn's disease. RESULTS Bone forming osteocalcin levels were significantly (p<0.001) increased during infliximab therapy. In contrast, no significant changes in beta-crosslaps and vitamin D levels were observed. Vitamin D levels were significantly different when the summer and winter periods were compared at week 0 (p=0.039); however, this difference was not detected after one year of infliximab therapy. Despite the beneficial clinical effect of infliximab, there was no significant change in bone mineral density Z-scores after one year of treatment. CONCLUSION Infliximab may beneficially affect bone homeostasis. Moreover, seasonal variability in vitamin D levels observed prior to initiation of infliximab treatment was diminished after one year of treatment.
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Affiliation(s)
- Dolóresz Szabó
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Éva Hosszú
- 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - András Arató
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | | | - Nóra Béres
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | | | - Mária Papp
- Institute of Internal Medicine, Department of Gastroenterology, University of Debrecen, Clinical Center, Debrecen, Hungary
| | - Antal Dezsőfi
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Attila J Szabó
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary; MTA-SE, Pediatrics and Nephrology Research Group, Budapest, Hungary
| | - Dániel Szűcs
- Department of Pediatrics and Paediatric Health Care Center, University of Szeged, Faculty of Medicine, Szeged, Hungary
| | - Gabor Veres
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary.
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Sziksz E, Molnár K, Lippai R, Pap D, Onody A, Veres-Székely A, Vörös P, Szabó D, Győrffy H, Veres G, Tulassay T, Vannay A, Arató A. Peroxisome proliferator-activated receptor-γ and thymic stromal lymphopoietin are involved in the pathophysiology of childhood coeliac disease. Virchows Arch 2014; 465:385-93. [PMID: 25187315 DOI: 10.1007/s00428-014-1650-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Revised: 08/01/2014] [Accepted: 08/26/2014] [Indexed: 12/22/2022]
Abstract
Celiac disease (CD) is a chronic autoimmune enteropathy caused by exposure to dietary gluten in genetically predisposed individuals. The transcription factor peroxisome proliferator-activated receptor gamma (PPARγ) was shown to exert protective effects in several immune-mediated disorders. Activation of PPARγ suppressed the expression of thymic stromal lymphopoietin (TSLP), an inducer of proinflammatory cytokines. Since the role of TSLP in gluten-sensitive enteropathy is completely unknown, we investigated the involvement of TSLP and its regulator PPARγ in childhood CD. We collected duodenal biopsy specimens from 19 children with newly diagnosed CD, 6 children with treated CD (gluten-free diet, GFD), and 10 controls. Expression of mRNA and protein levels of PPARγ, TSLP, and TSLP receptor were determined by real-time RT-PCR and Western blot, respectively. Duodenal localization of PPARγ and TSLP was studied by immunohistochemistry. In duodenal mucosa of children with CD, the amount of PPARγ was significantly lower and simultaneously that of TSLP significantly higher compared to controls (p < 0.05). In GFD-treated patients, the levels of PPARγ mRNA and protein were significantly higher while that of TSLP markedly lower compared to newly diagnosed CD (p < 0.05). Immunohistochemistry revealed PPARγ and TSLP expression in lamina propria immune cells and in enterocytes. Low expression of PPARγ and high expression of TSLP in the duodenal mucosa of children with newly diagnosed CD suggest that they are involved in the pathophysiology of CD. We hypothesize that PPARγ may be an inhibitory regulator of TSLP-stimulated inflammatory processes in CD.
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Affiliation(s)
- Erna Sziksz
- MTA-SE, Pediatrics and Nephrology Research Group, Budapest, Hungary
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Kriván G, Szabó D, Kállay K, Benyó G, Kassa C, Sinkó J, Goda V, Arató A, Veres G. [Successful autologous haematopoietic stem cell transplantation in severe, therapy-resistant childhood Crohn's disease. Report on the first case in Hungary]. Orv Hetil 2014; 155:789-92. [PMID: 24819188 DOI: 10.1556/oh.2014.29892] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The biological therapy of Crohn's disease, such as infliximab is a powerful approach in the therapy of inflammatory bowel diseases. However, in some patients with aggressive disease course, even a combined immunosuppressive therapy will not result in permanent remission. Hematopoietic stem cell transplantation has emerged as a new potential therapeutic tool for inflammatory bowel diseases. The authors report the case of a 15-year-old boy with severe Crohn's disease resistant to combined immunosuppressive therapy. After a 3-years course of unsuccessful conventional therapy including infliximab, autologous hematopoietic stem cell transplantation was performed which resulted in a complete remission. One year after transplantation the patient has relapsed, but he could be treated effectively with conventional therapy regiments. To the best of knowledge of the authors, this is the first report in Hungary presenting hematopoietic stem cell therapy in patient with severe Crohn's disease.
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Affiliation(s)
- Gergely Kriván
- Egyesített Szent István és Szent László Kórház Budapest Albert Flórián u. 5-7. 1097
| | - Dolóresz Szabó
- Semmelweis Egyetem, Általános Orvostudományi Kar I. Gyermekgyógyászati Klinika Budapest
| | - Krisztián Kállay
- Egyesített Szent István és Szent László Kórház Budapest Albert Flórián u. 5-7. 1097
| | - Gábor Benyó
- Egyesített Szent István és Szent László Kórház Budapest Albert Flórián u. 5-7. 1097
| | - Csaba Kassa
- Egyesített Szent István és Szent László Kórház Budapest Albert Flórián u. 5-7. 1097
| | - János Sinkó
- Egyesített Szent István és Szent László Kórház Budapest Albert Flórián u. 5-7. 1097
| | - Vera Goda
- Egyesített Szent István és Szent László Kórház Budapest Albert Flórián u. 5-7. 1097
| | - András Arató
- Semmelweis Egyetem, Általános Orvostudományi Kar I. Gyermekgyógyászati Klinika Budapest
| | - Gábor Veres
- Semmelweis Egyetem, Általános Orvostudományi Kar I. Gyermekgyógyászati Klinika Budapest
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Szabó D, Kökönyei G, Arató A, Dezsőfi A, Molnár K, Müller KE, Lakatos PL, Papp M, Lovász BD, Golovics PA, Cseh A, Veres G. Autoregressive cross-lagged models of IMPACT-III and Pediatric Crohn's Disease Activity Indexes during one year infliximab therapy in pediatric patients with Crohn's disease. J Crohns Colitis 2014; 8:747-55. [PMID: 24434181 DOI: 10.1016/j.crohns.2013.12.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Accepted: 12/20/2013] [Indexed: 02/08/2023]
Abstract
BACKGROUND Quality of life (QoL) is an important outcome measure in the evaluation of therapies for inflammatory bowel disease. The primary aim of this study was to determine the effect of one year infliximab treatment on QoL and clinical parameters in pediatric patients with Crohn's diseases (CD). METHODS Our prospective study involved 51 children with conventional therapy resistant, severe CD (mean age: 15.25years, range: 11-18years). Infliximab was given according to the protocol (5mg/kg, at weeks 0, 2, 6 and every 8weeks). During the infliximab courses QoL of patients was evaluated by IMPACT-III questionnaire at weeks 0, 6, 30 and 53. At the same time, the Pediatric Crohn's Disease Activity Index (PCDAI) score was calculated. Moreover, serum C-reactive protein (CRP), serum platelets and serum albumin were followed up. Auto-regressive, cross-lagged models were used to assess relation between QoL and the clinical parameters. RESULTS The initial IMPACT-III scores [median, percentile 25-75 (pc 25-75) at week 0: 115, 102.5-130.25] increased significantly (p<0.001) following infliximab therapy at week 54 (median: 141.5, 124.5-153.75). Clinical and laboratory parameters also improved significantly (p<0.001). Auto-regressive regression coefficients (β value) were significant between each variable over time. The strongest cross-lagged relations were observed between IMPACT-III and serum albumin, IMPACT-III and platelets. Reliability test of IMPACT-III revealed an excellent level of internal consistency (Cronbach's alpha=0.931). CONCLUSION Infliximab treatment has beneficial clinical effect which is confirmed by decrease of PCDAI and increase of IMPACT-III. Autoregressive regression analysis showed regression relation between IMPACT-III and PCDAI and laboratory parameters.
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Affiliation(s)
- Dolóresz Szabó
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Gyöngyi Kökönyei
- Institute of Psychology, Eötvös Loránd University, Budapest, Hungary
| | - András Arató
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Antal Dezsőfi
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Kriszta Molnár
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | | | | | - Mária Papp
- 2nd Department of Medicine, University of Debrecen, Debrecen, Hungary
| | - Barbara D Lovász
- 1st Department of Internal Medicine, Semmelweis University, Budapest, Hungary
| | - Petra A Golovics
- 1st Department of Internal Medicine, Semmelweis University, Budapest, Hungary
| | - Aron Cseh
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Gábor Veres
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary.
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Ivády B, Szabó D, Damjanova I, Pataki M, Szabó M, Kenesei É. Recurrent outbreaks of Serratia marcescens among neonates and infants at a pediatric department: an outbreak analysis. Infection 2014; 42:891-8. [DOI: 10.1007/s15010-014-0654-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Accepted: 06/21/2014] [Indexed: 12/14/2022]
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Abstract
Genetic background of coeliac disease has been subjects to intensive research since decades. However, only results of HLA phenotyping have been taken over to routine clinical practice. Meanwhile, data on the role of epigenetical factors in the manifestation of diseases have been emerging. In coeliac disease, there are several questions both in the fields of genetics and epigenetics yet to be answered. In this review, a cross section of current knowledge on these issues is presented with special interest regarding the future clinical applications.
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Affiliation(s)
- Dorottya Kocsis
- Semmelweis Egyetem, Általános Orvostudományi Kar II. Belgyógyászati Klinika Budapest Szentkirályi u. 46. 1088
| | - Nóra Béres
- Semmelweis Egyetem, Általános Orvostudományi Kar I. Gyermekgyógyászati Klinika Budapest
| | - Gábor Veres
- Semmelweis Egyetem, Általános Orvostudományi Kar I. Gyermekgyógyászati Klinika Budapest
| | - Dolóresz Szabó
- Semmelweis Egyetem, Általános Orvostudományi Kar I. Gyermekgyógyászati Klinika Budapest
| | - Katalin Eszter Müller
- Semmelweis Egyetem, Általános Orvostudományi Kar I. Gyermekgyógyászati Klinika Budapest
| | - András Arató
- Semmelweis Egyetem, Általános Orvostudományi Kar I. Gyermekgyógyászati Klinika Budapest
| | - Márk Juhász
- Semmelweis Egyetem, Általános Orvostudományi Kar II. Belgyógyászati Klinika Budapest Szentkirályi u. 46. 1088
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Tóth Á, Kocsis B, Damjanova I, Kristóf K, Jánvári L, Pászti J, Csercsik R, Topf J, Szabó D, Hamar P, Nagy K, Füzi M. Fitness cost associated with resistance to fluoroquinolones is diverse across clones of Klebsiella pneumoniae and may select for CTX-M-15 type extended-spectrum β-lactamase. Eur J Clin Microbiol Infect Dis 2013; 33:837-43. [DOI: 10.1007/s10096-013-2022-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 11/15/2013] [Indexed: 11/24/2022]
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14
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Valcz G, Bándi I, Wichmann B, Patai A, Szabó D, Kiszler G, Kozlovszky M, Molnár B, Tulassay Z. Automated detection of epithelial changes in colorectal carcinoma. Z Gastroenterol 2012. [DOI: 10.1055/s-0032-1312437] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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15
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Kristóf K, Kocsis E, Szabó D, Kardos S, Cser V, Nagy K, Hermann P, Rozgonyi F. Significance of methicillin–teicoplanin resistant Staphylococcus haemolyticus in bloodstream infections in patients of the Semmelweis University hospitals in Hungary. Eur J Clin Microbiol Infect Dis 2011; 30:691-9. [DOI: 10.1007/s10096-010-1142-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Accepted: 12/20/2010] [Indexed: 11/24/2022]
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16
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Veres G, Szabó D, Várkonyi Á, Tari B, Polgár M, B. Kovács J, Horváth Á, Tomsits E, Tokodi I, Bodánszky H, Dezsőfi A, Szakos E, Vass N, Ruszinkó V, Kovács M, Müller KE, Arató A. Analysis of infliximab treated pediatric patients with Crohn disease in Hungary. Orv Hetil 2010; 151:179-83. [DOI: 10.1556/oh.2010.28792] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A terápiarezisztens, súlyos Crohn-beteg gyermekek kezelésére új lehetőséget nyújt az antitumornekrózis-faktor-α-terápia (infliximab). Jelen vizsgálat célja az infliximabterápia hatékonyságának, mellékhatásainak felmérése hazánkban, a gyógyszer gyermekgyógyászati alkalmazásának engedélyezésétől a 2008. december 31-ig terjedő időszakban. A vizsgált periódusban országosan 23 gyermek részesült infliximabkezelésben. Az indukciós terápia során a betegek 5 mg/ttkg infliximabot kaptak a 0., a 2. és a 6. héten, ahol meghatároztuk a betegség aktivitását jelző mutatót (pediatric Crohn disease activity index). Az infliximabkezelés során kedvező terápiás választ 18 betegnél (81,8%) tapasztaltunk, teljes remisszióba 13 gyermek került (59,1%). A számításokat 22 beteg adatai alapján végeztük. A kezelés 6. hetére a fistulák 70%-a bezárult. A gyógyszerrel összefüggésbe hozható akut infúziós reakció 2 betegnél jelentkezett, egy másik esetben anaphylaxiás reakció alakult ki. Késői mellékhatás három gyermeknél jelentkezett. A vizsgálatunkban részt vett, hagyományos terápiára rezisztens, súlyos Crohn-betegek döntő többségénél az indukciós infliximabterápia hatásosnak bizonyult.
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Affiliation(s)
- Gábor Veres
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar I. Gyermekgyógyászati Klinika Budapest Bókay J. u. 53. 1083
| | - Dolóresz Szabó
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar I. Gyermekgyógyászati Klinika Budapest Bókay J. u. 53. 1083
| | - Ágnes Várkonyi
- 2 Szegedi Tudományegyetem, Általános Orvostudományi Kar Gyermekgyógyászati Klinika és Gyermekegészségügyi Központ Szeged
| | - Beáta Tari
- 2 Szegedi Tudományegyetem, Általános Orvostudományi Kar Gyermekgyógyászati Klinika és Gyermekegészségügyi Központ Szeged
| | - Marianne Polgár
- 3 Heim Pál Gyermekkórház Madarász utcai kirendeltsége Budapest
| | | | - Ágnes Horváth
- 5 Veszprém Megyei Csolnoky Ferenc Kórház Nonprofit Zrt. Veszprém
| | - Erika Tomsits
- 6 Semmelweis Egyetem, Általános Orvostudományi Kar II. Gyermekgyógyászati Klinika Budapest
| | - István Tokodi
- 7 Fejér Megyei Szent György Kórház Újszülött-, Csecsemő- és Gyermekosztály Székesfehérvár
| | - Hedvig Bodánszky
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar I. Gyermekgyógyászati Klinika Budapest Bókay J. u. 53. 1083
| | - Antal Dezsőfi
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar I. Gyermekgyógyászati Klinika Budapest Bókay J. u. 53. 1083
| | - Erzsébet Szakos
- 8 Borsod-Abaúj-Zemplén Megyei Kórház és Egyetemi Oktatókórház Miskolc
| | - Noémi Vass
- 2 Szegedi Tudományegyetem, Általános Orvostudományi Kar Gyermekgyógyászati Klinika és Gyermekegészségügyi Központ Szeged
| | | | - Márta Kovács
- 9 Petz Aladár Megyei Oktatókórház Csecsemő- és Gyermekosztály Győr
| | - Katalin Eszter Müller
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar I. Gyermekgyógyászati Klinika Budapest Bókay J. u. 53. 1083
| | - András Arató
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar I. Gyermekgyógyászati Klinika Budapest Bókay J. u. 53. 1083
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Veres G, Putz R, Szabó D, Molnár K, Bodánszky H, Dezsofi A, Arató A. [Adalimumab treatment in infliximab-resistant pediatric patient with Crohn's disease]. Orv Hetil 2009; 150:1858-60. [PMID: 19789146 DOI: 10.1556/oh.2009.28731] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Treatment with the chimeric monoclonal antibody (infliximab) is highly effective in refractory and fistulising Crohn's disease, nevertheless, infliximab resistance may occur. Authors report a 12-year-old boy with infliximab refractory luminal Crohn's disease including 3 active perianal fistulas. The patient was treated successfully with adalimumab, a fully human anti-tumor necrosis factor alpha monoclonal antibody. After 10 weeks of therapy, the previously high activity index returned to normal and the fistulas were closed. Quality of life using validated questionnaire improved significantly also. Adalimumab might be a suitable therapy even in pediatric Crohn's disease patients with infliximab resistance.
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Affiliation(s)
- Gábor Veres
- Semmelweis Egyetem, Altalános Orvostudományi Kar, I. Gyermekgyógyászati Klinika, Budapest.
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18
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19
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Kristóf K, Szabó D, Marsh JW, Cser V, Janik L, Rozgonyi F, Nobilis A, Nagy K, Paterson DL. Extended-spectrum beta-lactamase-producing Klebsiella spp. in a neonatal intensive care unit: risk factors for the infection and the dynamics of the molecular epidemiology. Eur J Clin Microbiol Infect Dis 2007; 26:563-70. [PMID: 17587071 DOI: 10.1007/s10096-007-0338-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The extended-spectrum beta-lactamase (ESBL)-producing Klebsiella spp. cause worldwide problems in intensive care units. The aim of this study was to investigate the molecular epidemiology of ESBL-producing Klebsiella pneumoniae and K. oxytoca strains in a neonatal intensive care unit (NICU) in Budapest, Hungary and to determine the risk factors of the infections and the epidemiological features. Infections with Klebsiella spp. were analyzed retrospectively by reviewing the medical records between January 2001 and December 2005. Antibiotic susceptibility tests, isoelectric focusing, pulsed field gel electrophoresis, plasmid analysis, PCR for bla(TEM) and bla(SHV) and DNA sequencing analysis were performed on ESBL-producing Klebsiella isolates. A total of 45 babies were found to be infected with non-ESBL-producing Klebsiella spp. and 39 with ESBL-producing Klebsiella spp. Of the parameters analyzed, including sex, gestational age, twin pregnancy, birth weight, presence of central vascular catheter, mechanical ventilator use, parenteral nutrition, polymicrobial infection, caesarean section, transfusion and mortality, we found no statistically significant difference between the ESBL and the non-ESBL groups, or between the K. pneumoniae and K. oxytoca species. Further characterization of the ESBL-producing K. pneumoniae and K. oxytoca strains isolated between February 2001 and January 2003 revealed three distinct PFGE patterns of SHV-5-producing K. pneumoniae (A, B, E) and two distinct patterns of SHV-12-producing K. oxytoca (C,D) isolates; these had different plasmid profiles. From July to November 2005, a new SHV-5 producing K. oxytoca (F) was isolated. The molecular epidemiology of ESBL-producing organisms in a NICU over time shows substantial shifts in predominant strains. The ESBL production of the infected organisms has an impact on the survival of newborn babies with infections caused by Klebsiella spp.
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Affiliation(s)
- K Kristóf
- Institute of Medical Microbiology, Semmelweis University, Nagyvárad tér 4, 1089, Budapest, Hungary
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20
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Szabó D, Rókusz L, Juhász Z, Szentandrássy J, Katona K, Nagy K. P1362 Thefirst isolation of PER-1-producing Pseudomonas aeruginosa and Acinetobacter baumanii strains in Hungary. Int J Antimicrob Agents 2007. [DOI: 10.1016/s0924-8579(07)71202-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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21
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Affiliation(s)
- Gy. Szókán
- a Department of Organic Chemistry , Eötvös Loránd University , P.O. Box 32 H-1518, Budapest , 112 , Hungary
| | - Sz. Szarvas
- a Department of Organic Chemistry , Eötvös Loránd University , P.O. Box 32 H-1518, Budapest , 112 , Hungary
| | - Zs. Majer
- a Department of Organic Chemistry , Eötvös Loránd University , P.O. Box 32 H-1518, Budapest , 112 , Hungary
| | - D. Szabó
- a Department of Organic Chemistry , Eötvös Loránd University , P.O. Box 32 H-1518, Budapest , 112 , Hungary
| | - I. Kapovits
- a Department of Organic Chemistry , Eötvös Loránd University , P.O. Box 32 H-1518, Budapest , 112 , Hungary
| | - M. Hollósi
- a Department of Organic Chemistry , Eötvös Loránd University , P.O. Box 32 H-1518, Budapest , 112 , Hungary
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22
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Glatz K, Szabó D, Szabó G, Boriszova D, Rozgonyi F. Emergence of extremely high penicillin and cefotaxime resistance and high-level levofloxacin resistance in clinical isolates of Streptococcus pneumoniae in Hungary. J Antimicrob Chemother 2001; 48:731-4. [PMID: 11679565 DOI: 10.1093/jac/48.5.731] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Oxacillin disc diffusion tests revealed that 36.7% of 327 Hungarian Streptococcus pneumoniae strains from clinical specimens were not penicillin susceptible. Determination of the MICs of penicillin, cefotaxime and levofloxacin for these strains by Etest confirmed that 30 (9.2%), 19 (5.8%) and four to 11 (1.2-3.4%) were fully penicillin-, cefotaxime- and levofloxacin-resistant, respectively. Most had extremely high MICs. Lower respiratory tract strains were more resistant than those from the upper respiratory tract. Levofloxacin-resistant strains were either penicillin intermediate or resistant, but their MICs did not correlate strongly.
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Affiliation(s)
- K Glatz
- Institute of Medical Microbiology, Semmelweis University, Box 370, H-1445 Budapest, Hungary
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Csiha A, Szabó D. [Not Available]. Orvostort Kozl 2001; 75-76:194-202. [PMID: 11627023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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24
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Sharples D, Hajós G, Riedl Z, Csányi D, Molnár J, Szabó D. Ellipticine analogues and related compounds as inhibitors of reverse transcriptase and as inhibitors of the efflux pump. Arch Pharm (Weinheim) 2001; 334:269-74. [PMID: 11688136 DOI: 10.1002/1521-4184(200109)334:8/9<269::aid-ardp269>3.0.co;2-#] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Ten polycyclic derivatives related to ellipticine have been synthesised and tested for their intercalating, reverse transcriptase (RT) inhibitory and multidrug resistance efflux pump inhibitory properties. The intercalating activity and the RT inhibitory activity of the derivatives suggest that ellipticine analogues bind at an allosteric binding site on RT or that this inhibition could be controlled at the DNA level. The MDR efflux pump inhibitory activities of these derivatives, however, appears to be unrelated to the DNA binding ability.
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Affiliation(s)
- D Sharples
- University of Manchester, School of Pharmacy and Pharmaceutical Sciences, Oxford Road, Manchester, M13 9PL, UK
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Szabó D, Máthé A, Filetóth Z, Anderlik P, Rókusz L, Rozgonyi F. In vitro and in vivo activities of amikacin, cefepime, amikacin plus cefepime, and imipenem against an SHV-5 extended-spectrum beta-lactamase-producing Klebsiella pneumoniae strain. Antimicrob Agents Chemother 2001; 45:1287-91. [PMID: 11257049 PMCID: PMC90458 DOI: 10.1128/aac.45.4.1287-1291.2001] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The in vitro and in vivo effectiveness of amikacin, cefepime, and imipenem was studied using a high inoculum of an extended-spectrum beta-lactamase-producing Klebsiella pneumoniae strain. An in vitro susceptibility test at the standard inoculum predicted the in vivo outcome of amikacin or imipenem while it did not do so for cefepime due to the inoculum effect.
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Affiliation(s)
- D Szabó
- Institute of Medical Microbiology, Semmelweis University, Budapest, Hungary.
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26
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Wiener Z, Búzás E, Kovács P, Csaba G, Szabó D, Kittel A, Pállinger E, Watanabe T, Ohtsu H, Ichikawa A, Nagy A, Falus A. Highly reduced peritoneal mast cell number and decreased c-kit expression in histidine decarboxylase knock out mice. Inflamm Res 2001; 50 Suppl 2:S55-6. [PMID: 11411602 DOI: 10.1007/pl00022406] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Affiliation(s)
- Z Wiener
- Department of Genetics, Cell- and Immunobiology, Semmelweis Medical University, Budapest, Hungary
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Berek L, Szabó D, Petri IB, Shoyama Y, Lin YH, Molnár J. Effects of naturally occurring glucosides, solasodine glucosides, ginsenosides and parishin derivatives on multidrug resistance of lymphoma cells and leukocyte functions. In Vivo 2001; 15:151-6. [PMID: 11317520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Solamargine, solasonine, ginsenosides and parishin-related compounds were investigated for their effects on mdr efflux pump of lymphoma cells, and their effects on T cell proliferative assays and cell mediated immune functions, antibody-dependent cellular cytotoxicity (ADCC) and natural killer (NK) cell activity of human peripheral mononuclear cells. Solamargine and solasonine were the only drugs which inhibited all of the tested immune functions; however, ginsenoside Rc and Rd enhanced T cell proliferative assays and marginally increased the NK cell activity. The majority of the compounds were not able to reverse the multidrug resistance of mouse lymphoma cells. However, ginsenosides Rc, Rd and parishin C were able to moderately reduce the activity of the efflux pump. Parishin, parishin C and crude extract significantly enhanced the ADCC reaction.
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Affiliation(s)
- L Berek
- Institute of Microbiology, University of Szeged, Faculty of Medicine, Dom ter 10, 6720 Szeged, Hungary
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Varga J, Szabó D, Hollósi M. Exciton coupling in the CD spectra of chiral spiro-lambda 4-sulfanes and related sulfonium salts. Enantiomer 2001; 5:513-20. [PMID: 11143815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Enantiomers of spiro-lambda 4-sulfanes 2-7 and related cyclic sulfonium salts 2c-7c have been obtained by stereospecific synthesis. Exciton splitting was observed in the CD spectra of spiro-lambda 4-sulfanes and sulfonium salts having both benzene and naphthalene-benzene rings. The absolute configurations were deduced from the sign of the couplet. Exciton couplets in the CD spectra of sulfonium salts and their parent lambda 4-sulfanes show the same sign which follows from the same orientation of the coupled electric transition moments due to their similar trigonal bipyramidal geometry. Based on the known stereomechanism of the formation of spiro-lambda 4-sulfanes and sulfonium salts as well as of their hydrolysis leading to the corresponding sulfoxides (2a-7a and 2b-7b), the absolute configurations of sulfoxides could also be deduced from the sign of exciton couplet in the CD spectra of related lambda 4-sulfanes and sulfonium salts.
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Affiliation(s)
- J Varga
- Department of Organic Chemistry, Eötvös Loránd University, H-1518 Budapest 112, P.O. Box 32, Hungary
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Gál Z, Szabó D, Kovács P, Hernádi F, Tóth-Martinez B, Rozgonyi F. beta-Lactam susceptibility patterns and investigation of cephalosporin hydrolysing beta-lactamases of Gram-negative extraintestinal clinical isolates. Int J Antimicrob Agents 2000; 16:395-400. [PMID: 11118847 DOI: 10.1016/s0924-8579(00)00190-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Of more than 3500 isolates of enterobacteriaceae, 48-69% were resistant to aminopenicillins and 11-45% to amoxycillin+clavulanic acid. Resistance to second and third generation cephalosporins was present in 11-17 and 3-8% of Escherichia coli, 47-56 and 15-52% of Klebsiella-Enterobacter, 36-57 and 16-27% of Proteus, Providencia and Morganella isolates. Pseudomonas aeruginosa strains varied in their resistance to antipseudomonal beta-lactams. Isoelectric points, inhibitor profiles and substrate profiles of beta-lactamases extracted from representatives of the resistant strains indicated that the resistance was mainly due to the hyperproduction of chromosomally encoded AmpC beta-lactamases. This was confirmed by plasmid profile and PCR investigations. Extended-spectrum beta-lactamase and metallo-penicillinase producing strains were not found. One Pseudomonas maltophilia strain produced an oxacillinase.
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Affiliation(s)
- Z Gál
- Department of Pharmacology, University of Debrecen, Debrecen, Hungary
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Szabó D, Keyzer H, Kaiser HE, Molnár J. Reversal of multidrug resistance of tumor cells. Anticancer Res 2000; 20:4261-74. [PMID: 11205256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Drug resistance to chemotherapy is rapidly emerging. Resistance to one drug carries over resistance to unrelated anticancer drugs leading to multidrug resistance (MDR). A major factor of MDR is P-glycoprotein (P-gp) mediated ABC transport found in many eukaryotic cells. P-gp acts as a drug eMux pump. The mdr1 gene involved in P-gp 170 protein production is localized in the human chromosome 7 band p2 1.0-21.1. Point mutations after cross-resistance patterns. A variety of stimuli increase the expression of the mdr1 gene: lowered extracellular pH, heat shock, arsenite, cytotoxic agents, anticancer drugs, transfection with oncogenes, HIV-I, and UV-irradiation. An alternative hypothesis to the efflux pump claims that P-gp modifies the intracellular environment to reduce accumulation of anticancer drugs in cancer cells by creating ionic or proton gradients. Chemosensitizers that block P-gp drug extrusion are generally lipid-soluble at physiological pH, possess a basic nitrogen atom and at least two co-planar rings. P-gp blocking does not depend on drug chirality. This opens the way of treating P-gp related MDR with chiral versions of drugs relatively harmless in terms of side-effects. We believe that resistance modifiers combined with cytostatics will chemotherapeutically be more effective for cancer patients.
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MESH Headings
- ATP Binding Cassette Transporter, Subfamily B, Member 1/antagonists & inhibitors
- ATP Binding Cassette Transporter, Subfamily B, Member 1/chemistry
- ATP Binding Cassette Transporter, Subfamily B, Member 1/physiology
- ATP-Binding Cassette Transporters/physiology
- Animals
- Antineoplastic Agents/chemistry
- Antineoplastic Agents/metabolism
- Antipsychotic Agents/pharmacology
- Drug Resistance, Multiple/genetics
- Drug Resistance, Multiple/physiology
- Drug Resistance, Neoplasm/genetics
- Drug Resistance, Neoplasm/physiology
- Gene Expression Regulation, Neoplastic
- Genes, MDR/physiology
- Glycosylation
- Humans
- Molecular Conformation
- Phosphorylation
- Tumor Cells, Cultured/drug effects
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Affiliation(s)
- D Szabó
- Department of Medical Microbiology, University of Szeged, Szeged, Hungary
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Molnár J, Szabó D, Pusztai R, Mucsi I, Berek L, Ocsovszki I, Kawata E, Shoyama Y. Membrane associated antitumor effects of crocine-, ginsenoside- and cannabinoid derivates. Anticancer Res 2000; 20:861-7. [PMID: 10810367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
In the present work a systematic study was initiated with crocine, ginsenoside and cannabinoid derivatives on multidrug resistant mouse lymphoma cells, viral tumor antigen expression and some human leukocyte functions. Among saffron derivatives, crocin and picrocrocin, triglucosyl and diglucosyl crocetin were ineffective on the reversal of multidrug resistance of lymphoma cells. Ginsenoside increased drug accumulation and tumor antigen expression at 2.0-20.0 micrograms/mL. Some cannabinoid derivatives such as cannabinol, cannabispirol and cannabidiol increased drug accumulation, while cannabidiolic acid, delta-9-THC and tetrahydro-cannabidiolic acid reduced drug accumulation of the human mdr1-gene transfected mouse lymphoma cells. The reversal of multidrug resistance is the result of the inhibition of the efflux pump function in the tumor cells. Crocetin esters were less potent than crocin itself in the inhibition of EBV early antigen expression. However crocin and diglucosylcrocetin inhibited early tumor antigen expression of adenovirus infected cells, but triglucosylcrocetin was less effective at 0.01-1.0 microgram/mL. The crocin had no antiviral effect [on HSV-2 infected vero cells] up to 25 micrograms/mL concentration. Ginsenosides had a moderate inhibitory effect except ginsenoside Rb1 (was the less effective) on the drug efflux pump. Among the cannabinoid derivatives the cannabinol and cannabispirol increased drug accumulation, while cannabidiolic acid and delta-8-THC, delta-9-THC and tetrahydro-cannabinol reduced drug accumulation in multidrug resistant mouse lymphoma cells. It is interesting that ginsenosides had a chemical structure-dependent immunomodulating effect by enhancing the activity of NK-cells and ADCC activities.
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Affiliation(s)
- J Molnár
- Institute of Microbiology, Albert Szent-Gyorgyi Medical University, Szeged, Hungary
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Abstract
Materials producing strain in a magnetic field are known as magnetoelastic or magnetostrictive materials. A new type of material that is able to produce giant strain in a nonhomogeneous magnetic field has been developed. In these magnetic-field-sensitive gels (ferrogels) fine colloidal particles having superparamagnetic behavior are incorporated into a highly swollen elastic polymer network. Magnetic properties of ferrogels have been investigated using electron microscopy, static magnetization measurements, and Mössbauer spectroscopy. Analysis of the data yielded information on the superparamagnetic behavior of ferrogels and made it possible to estimate the size distribution of the magnetic cores of magnetite particles made by chemical precipitation and built into a chemically cross-linked polyvinyl alcohol matrix. The results are interpreted on the basis of a core-shell model. Copyright 2000 Academic Press.
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Affiliation(s)
- D Szabó
- Department of Physical Chemistry, Technical University of Budapest, Budapest, H-1521, Hungary
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Szabó D, Filetóth Z, Szentandrássy J, Némedi M, Tóth E, Jeney C, Kispál G, Rozgonyi F. Molecular epidemiology of a cluster of cases due to Klebsiella pneumoniae producing SHV-5 extended-spectrum beta-lactamase in the premature intensive care unit of a Hungarian hospital. J Clin Microbiol 1999; 37:4167-9. [PMID: 10565955 PMCID: PMC85914 DOI: 10.1128/jcm.37.12.4167-4169.1999] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Fifteen nosocomial cases of extended-spectrum beta-lactamase-producing Klebsiella pneumoniae occurred among 132 neonates in a premature intensive care unit in Hungary in June through November 1998. Fourteen strains were indistinguishable by molecular biological typing and harbored the same single conjugative extended-spectrum beta-lactamase-encoding plasmid that was spontaneously found in a Serratia marcescens strain in the same patient.
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Affiliation(s)
- D Szabó
- Institute of Microbiology, Semmelweis University of Medicine, Budapest.
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36
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Abstract
Anti-psychotic drugs are used in cancer patients undergoing chemotherapy frequently and the concomitantly used drugs may alter the pharmacokinetics of each other. One reason for the alteration of pharmacokinetics may be the modulation of the function of P-glycoprotein, whose efflux pump occurs in resistant cancer cells, in human intestine and in the blood-brain barrier. For this reason we tested the effect of several anti-psychotic drugs on the multidrug-resistant pump, P-glycoprotein. We found that in the MDR gene transfected L121C MDR, L5178 MDR and in the KB-V-1 cells selected for resistance some antipsychotic drugs block the function of P-glycoprotein. Blood cells of two treatment-resistant leukemic patients also showed increased uptake of daunorubicin if treated ex vivo with the anti-psychotic drugs. Our results suggest that pharmacokinetic studies should be performed prior to concomitant clinical use of such drugs which block P-glycoprotein function.
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Affiliation(s)
- D Szabó
- Institute of Microbiology, Albert Szent-Györgyi Medical University, Szeged, Hungary
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Szabó D. [Comment on the subject of cumulative incidence of pectus excavatum in the township of Tata in Hungary]. Orv Hetil 1999; 140:1030. [PMID: 10349328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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Affiliation(s)
- D. Szabó
- Department of Physical Chemistry and Institute of Physics, Technical University of Budapest 1521 Budapest, Hungary
| | - G. Szeghy
- Department of Physical Chemistry and Institute of Physics, Technical University of Budapest 1521 Budapest, Hungary
| | - M. Zrínyi
- Department of Physical Chemistry and Institute of Physics, Technical University of Budapest 1521 Budapest, Hungary
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Nacsa J, Nagy L, Sharples D, Hevér A, Szabó D, Ocsovszki I, Varga A, König S, Molnár J. The inhibition of SOS-responses and MDR by phenothiazine-metal complexes. Anticancer Res 1998; 18:3093-8. [PMID: 9713516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The gene of multidrug resistance (mdr) is inducible by different environmental stresses (SOS gene). We tested the inhibitory action of some new metal complexes of phenothiazines on megacin encoding bacterial gene induced by mitomycin-C as an example of "SOS induction" and on efflux pump of mouse lymphoma cells. The interaction of compounds to DNA was measured by thermal stability of DNA. It was found that metal co-ordination complexes of trifluoperazine (TFP) and chlorpromazine (CPZ) added before mitomycin administration have an inhibitory action on megacine induction. The TFP-V(IV) complex was effective at a lower concentration than TFP alone. The inhibitory effect of some metal coordinating complexes (TFP-Cu(II) and TFP- V(IV)) exceeded the action of TFP alone on efflux pumps. We propose that these compounds can form a complex with the regulatory protein or DNA resulting in the inhibition of SOS response and inhibit the mdr function by inactivating the P-glycoprotein as well.
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MESH Headings
- ATP Binding Cassette Transporter, Subfamily B, Member 1/biosynthesis
- Animals
- Antibiotics, Antineoplastic/pharmacology
- Bacillus megaterium/drug effects
- Bacillus megaterium/metabolism
- DNA, Bacterial/drug effects
- DNA, Bacterial/metabolism
- DNA, Neoplasm/drug effects
- DNA, Neoplasm/metabolism
- Drug Resistance, Multiple/genetics
- Gene Expression Regulation, Bacterial/drug effects
- Lymphoma, T-Cell/metabolism
- Megacins/biosynthesis
- Metals/chemistry
- Metals/pharmacology
- Mice
- Mitomycin/pharmacology
- Phenothiazines/chemistry
- Phenothiazines/pharmacology
- SOS Response, Genetics/drug effects
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Affiliation(s)
- J Nacsa
- Department of Microbiology, Albert Szent-Györgyi Medical University, Szeged, Hungary
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Szabó D, Molnár J. The role of stereoselectivity of chemosensitizers in the reversal of multidrug resistance of mouse lymphoma cells. Anticancer Res 1998; 18:3039-44. [PMID: 9713506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The effect of three different stereoisomer pairs of CNS (central nervous system) active compounds was studied on the activity of human mdr1 p-glycoprotein. The methotrimeprazine, clopenthixol and butaclamol isomers had an antiproliferative effect (ID50) on the mdr1 expressing cells at 0.250 microgram/ml, while the parental cells were less sensitive having ID50 at 0.37-0.69 microgram/ml. Enantiomers of methotrimeprazine and clopenthixol had similar effectivity on the drug efflux of mdr cells. However, (-)butaclamol was found to inhibit mdr efflux-pump activity much more than the CNS active (+) isomer. Based on these results, tricyclic compounds does not seem to have stereoselectivity in methotrimeprazine and clopenthixol on the mdr reversal effect. In general, both active and inactive members of stereoisomers had a similar effect on the drug accumulation of the mdr cells. Therefore, hypothetically the CNS inactive member of stereoisomer pairs can be used as a resistance modifier without any risk in patients suffering from drug resistant cancer.
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Affiliation(s)
- D Szabó
- Department of Microbiology, Albert Szent-Györgyi Medical University, Szeged, Hungary
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Szabó D, Barcs I, Rozgonyi F. Extended-spectrum beta-lactamases: an actual problem of hospital microbiology (a review). Acta Microbiol Immunol Hung 1998; 44:309-25. [PMID: 9554165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Although there is a variety of mechanisms of bacterial resistance to beta-lactam antibiotics, the most important one is production of beta-lactamases inactivating penicillins and cephalosporins. The classification of beta-lactamases is based on biochemical, enzymological (i.e. molecular structure, inhibitory property, substrate-profile, relative rate of hydrolysis) and immunological characters. Extended-spectrum beta-lactamases (ESBLs) can be derived from TEM or SHV enzymes. These enzymes have now been sequenced and it has been found that relatively few point mutations have occurred in the gene of the TEM and SHV type enzymes. These point mutations clustered in five areas of the gene. The amino acid mutations can alter the conformation, the active site and change the hydrance of beta-lactamase-cephalosporin binding capacity. So the enzyme is able to bind and hydrolyse the third generation cephalosporins. Successive mutation interacted radically increasing the binding capacity of enzymes and confer resistance to newer cephalosporins. The use of these drugs provides a strong selective pressure to develop these mutations. Sporadic nosocomial outbreaks due to strains producing an ESBL led to an epidemic problem in some hospitals resulting in a concurrent dissemination of genes, plasmids or strains. Clinical epidemiological importance and role of ESBLs and emergence of multiply resistance of bacteria of nosocomial importance are discussed in this brief.
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Affiliation(s)
- D Szabó
- Department of Microbiology, Central Military Hospital, Budapest, Hungary
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Szabó D, Kuti M, Kapovits I, Rábai J, Kucsman Á, Argay G, Czugler M, Kálmán A, Párkányi L. Spiro-λ4-sulfanes with intramolecular sulfur–oxygen interactions: Syntheses and molecular structures. J Mol Struct 1997. [DOI: 10.1016/s0022-2860(97)00098-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zrı́nyi M, Barsi L, Szabó D, Kilian HG. Direct observation of abrupt shape transition in ferrogels induced by nonuniform magnetic field. J Chem Phys 1997. [DOI: 10.1063/1.473589] [Citation(s) in RCA: 96] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Abstract
Impaired adrenocortical steroidogenic activity is often concomitant with morphologically and physiologically altered lipids in the cells of the adrenal cortex. The physical state of these lipid droplets and the morphological characteristics of crystal-shaped bodies were studied in different functional states of adrenocortical cells. In the perinatal period when steroidogenesis is suppressed by a negative feedback mechanism, crystal-shaped bodies (i.e. rectangular, electron-lucent formations, either alone or in clusters, surrounded by lysosomal matrix or in close proximity of lysosomes) were frequently observed in the inner zona fasciculata and zona reticularis. In experimentally suppressed adrenocortical activity, following the administration of dexamethasone, aminoglutethimide or cycloheximide, almost identical crystal-shaped bodies were frequently observed in adrenocortical cells. These crystal-shaped bodies appear to be cholesterol, as revealed by the digitonin reaction at the electron microscopic level. Following stimulation of the zona fasciculata by ACTH treatment for 14 days, a marked increase in the fluidity of the lipid droplets was observed in the thermotropic phase transitions with the polarizing microscope. In contrast, following aminoglutethimide treatment, the fluidity of the lipid droplets decreased. The thermotropic phase transitions of normal and neoplastic human adrenal cells, namely adrenocortical tumours causing Conn's or Cushing's syndrome, were also investigated. When hormone biosynthesis was enhanced, the appearance of birefringence and multiple phase transitions of lipid droplets was demonstrable in the low-temperature range.
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Affiliation(s)
- D Szabó
- Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
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45
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Orsó E, Szalay KS, Szabó D, Stark E, Fehér T, Perner F, Hidvégi M. Effects of joining peptide (1-18) and histamine on dehydroepiandrosterone (DHEA) and dehydroepiandrosterone sulphate (DHEAS) production of human adrenocortical cells in vitro. J Steroid Biochem Mol Biol 1996; 58:207-10. [PMID: 8809202 DOI: 10.1016/0960-0760(96)00027-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Joining peptide 1-18 (JP 1-18), added alone in concentrations of 10(-13)-10(-7) M to collagenase-dispersed human adrenocortical cells, did not affect the basal production of corticosterone, cortisol, aldosterone, dehydroepiandrosterone (DHEA) and dehydroepiandrosterone sulphate (DHEAS). JP 1-18 potentiated the ACTH-stimulated production of steroids. When administered in combination with histamine (10(-8)-10(-3) M), JP 1-18 (10(-8) or 10(-10) M), enhanced the synthesis of DHEA and DHEAS. JP 1-18, together with histamine, may play a role in the regulation of DHEA and DHEAS production.
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Affiliation(s)
- E Orsó
- Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
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Orsó E, Szalay KS, Tóth IE, Szabó D, Stark E, Fehér T, Perner F, Hidvégi M. Effect of histamine on corticosteroid secretion of isolated human and rat adrenocortical cells. Inflamm Res 1995; 44 Suppl 1:S48-9. [PMID: 8520996 DOI: 10.1007/bf01674390] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Affiliation(s)
- E Orsó
- Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest
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47
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Szabó D, Kapovits I, Kucsman Á, Huszthy P, Argay G, Czugler M, Fülöp V, Kálmán A, Koritsánsky T, Párkányi L. Spirosulfuranes with different heteroatoms in axial positions A comparison of NS(IV)O and NS+(IV)⋰O systems. J Mol Struct 1993. [DOI: 10.1016/0022-2860(93)87004-s] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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48
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Vizi ES, Tóth IE, Orsó E, Szalay KS, Szabó D, Baranyi M, Vinson GP. Dopamine is taken up from the circulation by, and released from, local noradrenergic varicose axon terminals in zona glomerulosa of the rat: a neurochemical and immunocytochemical study. J Endocrinol 1993; 139:213-26. [PMID: 8308458 DOI: 10.1677/joe.0.1390213] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The effect of supramaximal electric field stimulation on [3H]dopamine (DA) release by rat adrenal capsule-glomerulosa preparations was studied using a micro-volume perfusion system. When the tissues were preloaded with [3H]DA, a considerable amount of [3H]DA and [3H]noradrenaline (NA) were released in response to field stimuli. Reserpinization, calcium removal or tetrodotoxin blocking of Na+ influx all completely inhibited the stimulation-evoked release of DA/NA, indicating that the radioactivity released is of neuronal and vesicular origin. In the adrenal cortex, a substantial proportion of tyrosine hydroxylase and dopamine-beta-hydroxylase immunoreactive nerve fibres and varicosities were observed around the zona glomerulosa. DA-containing nerves were not seen in the adrenal cortex; however, the same immunocytochemical procedures clearly demonstrated dopaminergic nerve cells and fibres in the substantia nigra and the striatum respectively, and cells of the adrenal medulla. Like the NA release from noradrenergic varicosities in the zona glomerulosa, the DA release from noradrenergic endings is not subject to negative feedback modulation through DA2 receptors since apomorphine, a DA2-receptor agonist, and sulpiride, a selective DA2-receptor antagonist, failed to affect the release. After in-vivo i.v. administration of [3H]DA, the glomerulosa content of DA and NA and the in-vitro release of [3H]DA and [3H]NA of zona glomerulosa both increased, indicating that the local varicose axon terminals were able to accumulate DA from the circulation, convert it into NA and release it in response to neural activity. This local arrangement of noradrenergic axon terminals, able to take up DA from the circulation and release it or convert it into NA, provides the possibility of a fine tuning of local circulation and aldosterone synthesis in the zona glomerulosa.
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Affiliation(s)
- E S Vizi
- Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest
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49
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Vizi ES, Tóth IE, Szalay KS, Windisch K, Orsó E, Szabó D, Vinson GP. Catecholamines released from local adrenergic axon terminals are possibly involved in fine tuning of steroid secretion from zona glomerulosa cells: functional and morphological evidence. J Endocrinol 1992; 135:551-61. [PMID: 1487708 DOI: 10.1677/joe.0.1350551] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The effect of supramaximal electric field stimulation on [3H]noradrenaline (NA) release and hormone production by rat adrenal capsule-glomerulosa preparations was studied using a microvolume perfusion system. A substantial proportion (about 20%) of nerve endings (varicosities) were observed close to zona glomerulosa cells, and about half of them appeared to be catecholaminergic, as judged by the chromaffin reaction of the synaptic vesicles studied at electron microscopic level. In tissue, preloaded with [3H]NA, the release of NA in response to electrical stimulation was frequency-dependent. Reserpinization, calcium removal or inhibition of Na+ influx by tetrodotoxin completely blocked NA release by field stimulation, indicating that the release resulted from axonal activity and is of vesicular origin. Neither the alpha 2-adrenoceptor agonist xylazine nor the muscarine-receptor agonist oxotremorine affected the stimulation-evoked release of [3H]NA, suggesting that, in contrast with other neurones present in the central nervous system or in the peripheral autonomic nervous system but like those in the median eminence, these axon terminals contained few presynaptic modulatory receptors. The NA (10.20 +/- 1.79 (S.E.M.) micrograms/g, n = 9), adrenaline (24.38 +/- 5.50 micrograms/g, n = 9) and dopamine (0.35 +/- 0.09 micrograms/g, n = 6) contents of the preparations were high, as determined by high-performance liquid chromatography. Our observations that the release and content of NA is high, and that a substantial proportion of catecholaminergic axon terminals lie in close proximity to zona glomerulosa cells (median value of the distance 300 nm) or to smooth muscle cells of the vessels, suggest that NA released from local adrenergic neurones without being presynaptically modulated may play an important role in fine-tuning both steroid production and/or blood flow through the gland, itself a powerful modulator of the adrenocortical response. This local modulating effect of NA may be especially significant when sympathetic activity is enhanced.
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Affiliation(s)
- E S Vizi
- Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest
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50
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Abstract
Lipid droplets, the storage places of cholesterol in adrenocortical cells, exhibit a relatively uniform appearance studied by the electron microscope but they are heterogeneous in respect of their optical polarizing properties. Optical birefringency was studied in cryosections of normal and hyperfunctioning adrenal cortex by a polarizing microscope, equipped with a cold/hot stage working in the temperature range from -40 to 40 degrees C. The majority of lipid droplets in normal adrenal cortex were optically anisotropic in each cortical zone at room temperature (22 degrees C) indicating a long-range molecular order of the lipid components. The lipids of the zona glomerulosa, in the cases of Conn's and Bartter's syndromes, became anisotropic when the temperature was lowered below ambient. The birefringency of the lipids of the zona fasciculata in the case of Cushing's disease was observed at temperatures below -10 degrees C indicating ordered packing of the components of lipid droplets at this temperature. Thus the lipids were more fluid in the hyperfunctioning, hormone-producing cells--this may represent an optimal precondition for their mobilization and processing by the hydrolyzing enzyme system. The changes in fluidity of the intracellular lipids can be attributed to different functional states in the adrenal cortex. Study of the thermotropic phase transitions of the lipid droplets by polarizing microscopy may be a useful additional method for the diagnosis of some adrenocortical diseases.
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Affiliation(s)
- E Orsó
- Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest
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