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Zhang L, Alkentar R, Manó S, Szabó J, Mankovits T, Csernátony Z. Biomechanical Comparison of the Roof Step Cut Technique with the Bulk Bone Graft Technique During Total Hip Arthroplasty for Hip Dysplasia: a Finite Element Analysis. Acta Chir Orthop Traumatol Cech 2023; 90:301-313. [PMID: 37898493] [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] [Subscribe] [Scholar Register] [Indexed: 10/30/2023]
Abstract
PURPOSE OF THE STUDY Different techniques have been reported to reconstruct the defi cient acetabulum during total hip arthroplasty (THA). The purpose of this study was to compare the biomechanical features of the bulk bone graft (BBG) technique (Harris acetabular plasty) and the Roof Step Cut (RSC) technique using fi nite element analysis. MATERIAL AND METHODS Based on a female patient's dysplastic hip CT scan, 3D models were assembled according to the two techniques. For the Harris technique, an irregular BBG was sculpted from a solid sphere, while for the RSC technique, the graft was sculpted into a step-cut shape with a similar size. Each graft was fi xed with two compression screws at two different angles (0° and 45°). Four fi nite element models were used to compare the von Mises stress distribution and total deformation of the grafts and the screws. The pressure and sliding distances of the contacts between the bone graft, metal cup and acetabular host bone were also analyzed. RESULTS For both of the bone grafts and the screws, compared to the Harris models, the maximum stress of the RSC models was signifi cantly lower (16.56 MPa, 25.50 MPa vs 97.13 MPa, 112.72 MPa) and the total deformation was signifi cantly smaller (0.0096 mm, 0.0089 mm vs 0.022 mm, 0.018 mm). 45° inserted screws generated higher stress at the end of the screws and on the outside of the bone graft. In case of 0° inserted screws, the maximum value was mainly located in the middle of the screws, inside the screw channel as well as at the contact area between the graft and the host bone. At all analyzed contacts, the RSC technique shows signifi cantly lower pressure and sliding distances, irrelevant to the screw's insertion angle. In comparison, the model of BBG with 45° screws showed a signifi cant sliding effect and higher contact pressure. CONCLUSIONS Compared with the BBG technique, the step-shaped graft of the RSC technique could signifi cantly reduce the maximum stress and deformation of the graft and the screws, and decrease the pressure and sliding distance between the bone graft, metal cup and the acetabular host bone. The angle of screw placement affects the location of stress and deformation. Key words: developmental dysplasia of the hip, total hip arthroplasty, acetabular reconstruction, bone graft, fi nite element analysis.
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Affiliation(s)
- L Zhang
- Department of Orthopedic Surgery, Faculty of Medicine, University of Debrecen, Hungary
| | - R Alkentar
- Doctoral School of Informatics, Faculty of Informatics, University of Debrecen, Hungary
| | - S Manó
- Laboratory of Biomechanics, Department of Orthopedic Surgery, Faculty of Medicine, University of Debrecen, Hungary
| | - J Szabó
- Department of Orthopedic Surgery, Faculty of Medicine, University of Debrecen, Hungary
| | - T Mankovits
- Department of Mechanical Engineering, Faculty of Engineering, University of Debrecen, Hungary
| | - Z Csernátony
- Department of Orthopedic Surgery, Faculty of Medicine, University of Debrecen, Hungary
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Molnár B, Aroca S, Dobos A, Orbán K, Szabó J, Windisch P, Stähli A, Sculean A. Treatment of multiple adjacent RT 1 gingival recessions with the modified coronally advanced tunnel (MCAT) technique and a collagen matrix or palatal connective tissue graft: 9-year results of a split-mouth randomized clinical trial. Clin Oral Investig 2022; 26:7135-7142. [PMID: 35994126 DOI: 10.1007/s00784-022-04674-9] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 08/10/2022] [Indexed: 11/24/2022]
Abstract
OBJECTIVES To evaluate t he long-term outcomes following treatment of RT 1 multiple adjacent gingival recessions (MAGR) using the modified coronally advanced tunnel (MCAT) with either a collagen matrix CM or a connective tissue graft (CTG). MATERIAL AND METHODS Sixteen of the original 22 subjects included in a randomized, controlled split-mouth clinical trial were available for the 9-year follow-up (114 sites). Recessions were randomly treated by means of MCAT + CM (test) or MCAT + CTG (control). Complete root coverage (CRC), mean root coverage (MRC), gingival recession depth (GRD), probing pocket depth (PD), keratinized tissue width (KTW), and thickness (KGT) were compared with baseline values and with the 12-month results. RESULTS After 9 years, CRC was observed in 2 patients, one in each group. At 9 years, MRC was 23.0 ± 44.5% in the test and 39.7 ± 35.1% in the control group (p = 0.179). The MRC reduction compared to 12 months was - 50.1 ± 47.0% and - 48.3 ± 37.7%, respectively. The upper jaw obtained 31.92 ± 43.0% of MRC for the test and 51.1 ± 27.8% for the control group (p = 0.111) compared to the lower jaw with 8.3 ± 46.9% and 20.7 ± 40.3%. KTW and KGT increased for both CM and CTG together from 2.0 ± 0.7 to 3.1 ± 1.0 mm (< 0.0001). There were no statistically significant changes in PD. CONCLUSION The present results indicate that (a) treatment of MAGR using MCAT in conjunction with either CM or CTG is likely to show a relapse over a period of 9 years, and (b) the outcomes obtained in maxillary areas seem to be more stable compared to the mandibular ones. CLINICAL RELEVANCE The mean root coverage at 12 months could not be fully maintained over 9 years. On a long-term basis, the results seem to be less stable in the mandible as compared to maxillary areas.
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Affiliation(s)
- B Molnár
- Department of Periodontology, Semmelweis University, Budapest, Hungary
| | - S Aroca
- Department of Periodontology, School of Dental Medicine, University of Bern, Bern, Switzerland
| | - A Dobos
- Department of Periodontology, Semmelweis University, Budapest, Hungary
| | - K Orbán
- Department of Periodontology, Semmelweis University, Budapest, Hungary
| | - J Szabó
- Department of Periodontology, Semmelweis University, Budapest, Hungary
| | - P Windisch
- Department of Periodontology, Semmelweis University, Budapest, Hungary
| | - A Stähli
- Department of Periodontology, School of Dental Medicine, University of Bern, Bern, Switzerland
| | - A Sculean
- Department of Periodontology, School of Dental Medicine, University of Bern, Bern, Switzerland.
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Antal D, Janka EA, Szabó J, Szabó IL, Szegedi A, Gáspár K, Bai P, Szántó M. Culture-based analyses of skin bacteria in lesional moist, and unaffected dry and sebaceous skin regions of hidradenitis suppurativa patients. J Eur Acad Dermatol Venereol 2022; 36:e731-e733. [PMID: 35642981 DOI: 10.1111/jdv.18254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 05/13/2022] [Indexed: 11/30/2022]
Affiliation(s)
- D Antal
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - E A Janka
- Department of Dermatology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - J Szabó
- Department of Medical Microbiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - I L Szabó
- Department of Dermatology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - A Szegedi
- Department of Dermatology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - K Gáspár
- Department of Dermatology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - P Bai
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.,MTA-DE Lendület Laboratory of Cellular Metabolism, University of Debrecen, Debrecen, Hungary.,Faculty of Medicine, Research Center for Molecular Medicine, University of Debrecen, Debrecen, Hungary
| | - M Szántó
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
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Inozemtsev K, Kodaira S, Kusumoto T, Kitamura H, Strádi A, Szabó J, Ambrožová I, Shurshakov V. Etched track detector methods for the identification of target nuclear fragments in cosmic radiation and accelerator proton beams. RADIAT MEAS 2021. [DOI: 10.1016/j.radmeas.2020.106505] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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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Nagy G, Görög D, Kóbori L, Mihály E, Piros L, Pőcze B, Sandil A, Szabó J, Mathe Z. Abdominal Compartment Syndrome After Liver Transplant in Drug-Induced Acute Liver Failure: A Case Report. Transplant Proc 2019; 51:1289-1292. [PMID: 31101216 DOI: 10.1016/j.transproceed.2019.04.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The incidence of drug-induced acute liver failure (ALF) has been increasing in recent years. Despite the complex intensive treatment, liver transplant should be performed in progressive cases. A systemic inflammatory response syndrome and the burden of surgical intervention promote abdominal compartment syndrome (ACS); observed preoperatively, they are significant negative prognostic factors. THE CASE: We demonstrate a young woman with liver transplant after ALF and a consecutive ACS. We presumed drug toxicity in the background of the rapidly progressive ALF, based on the preoperative hematologic examination and the histology of the removed liver. An ACS has occurred in the postoperative period that must have been resolved with mesh, and later, anatomic segment 2-3 resection had to be performed to further decrease the pressure. The patient left the hospital after 62 days with good graft function. DISCUSSION: A complex intensive care is mandatory in the case of orthotopic liver transplant for ALF. Outcomes are good after orthotopic liver transplant. An ACS might occur after surgery. In these rare cases a delayed abdominal closure or even a liver resection can be the only solution and sometimes an urgent need to resolve the life-threatening problem.
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Affiliation(s)
- G Nagy
- Department of Transplantation and Surgery, Semmelweis University, Budapest, Hungary.
| | - D Görög
- Department of Transplantation and Surgery, Semmelweis University, Budapest, Hungary
| | - L Kóbori
- Department of Transplantation and Surgery, Semmelweis University, Budapest, Hungary
| | - E Mihály
- 2nd Department of Internal Medicine, Semmelweis University, Budapest, Hungary
| | - L Piros
- Department of Transplantation and Surgery, Semmelweis University, Budapest, Hungary
| | - B Pőcze
- Department of Transplantation and Surgery, Semmelweis University, Budapest, Hungary
| | - A Sandil
- Department of Transplantation and Surgery, Semmelweis University, Budapest, Hungary
| | - J Szabó
- Department of Transplantation and Surgery, Semmelweis University, Budapest, Hungary
| | - Z Mathe
- Department of Transplantation and Surgery, Semmelweis University, Budapest, Hungary
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Inozemtsev KO, Kushin VV, Strádi A, Ambrožová I, Kodaira S, Szabó J, Tolochek RV, Shurshakov VA. MEASUREMENT OF DIFFERENT COMPONENTS OF SECONDARY RADIATION ONBOARD INTERNATIONAL SPACE STATION BY MEANS OF PASSIVE DETECTORS. Radiat Prot Dosimetry 2018; 181:412-417. [PMID: 29566221 DOI: 10.1093/rpd/ncy043] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 02/26/2018] [Indexed: 06/08/2023]
Abstract
The evaluation of different components of secondary radiation (charged fragments and neutrons) onboard ISS is described. Solid-state nuclear track detectors CR-39™ were applied for the measurements of short-range nuclear fragments, while the measurements of neutrons were carried out by means of thermo-luminescent dosimeters with various concentrations of 6Li and 7Li. The flux of charged secondaries and the gamma-equivalent neutron dose are presented in function of the low-LET dose in various modules of the Russian segment of ISS.
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Affiliation(s)
- K O Inozemtsev
- National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoye Shosse, 31, Moscow, Russian Federation
- Institute of Biomedical Problems of the Russian Academy of Sciences (IBMP RAS), Khoroshevskoye Shosse, 76A, Moscow, Russian Federation
| | - V V Kushin
- National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoye Shosse, 31, Moscow, Russian Federation
- Institute of Biomedical Problems of the Russian Academy of Sciences (IBMP RAS), Khoroshevskoye Shosse, 76A, Moscow, Russian Federation
| | - A Strádi
- Hungarian Academy of Sciences, Centre for Energy Research (MTA EK), Budapest, Hungary
| | - I Ambrožová
- Department of Radiation Dosimetry, Nuclear Physics Institute of the CAS, Na Truhlárce 39/64, Praha, Czech Republic
| | - S Kodaira
- Radiation Measurement Research Team, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, 4-9-1, Anagawa, Inage, Chiba, Japan
| | - J Szabó
- Hungarian Academy of Sciences, Centre for Energy Research (MTA EK), Budapest, Hungary
| | - R V Tolochek
- Institute of Biomedical Problems of the Russian Academy of Sciences (IBMP RAS), Khoroshevskoye Shosse, 76A, Moscow, Russian Federation
| | - V A Shurshakov
- Institute of Biomedical Problems of the Russian Academy of Sciences (IBMP RAS), Khoroshevskoye Shosse, 76A, Moscow, Russian Federation
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Toronyi E, Langer R, Deák Á, Hartmann E, Piros L, Homann M, Máthé Z, Szabó J, Chmel R, Doros A. Complications of Ureteric Anastomosis After Kidney Transplantation. Transplantation 2014. [DOI: 10.1097/00007890-201407151-02173] [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: 11/25/2022]
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Szabó J, Manó S, Kiss L, Jónás Z, Csernátony Z. Intraosseous structural graft technique: a new surgical concept in the treatment of superolateral defects in case of dysplastic acetabulum, during hip replacement surgery biomechanical and cadaver experimentations. Eur J Orthop Surg Traumatol 2013; 24:1447-53. [PMID: 24101187 DOI: 10.1007/s00590-013-1321-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Accepted: 09/24/2013] [Indexed: 11/24/2022]
Abstract
PURPOSE The replacement of the dysplastic hip, despite the numerous available surgical techniques, is not entirely solved. One of the reasons for this is the relative lack of bone in the acetabulum. In this study, we present a new concept (intraosseous structural graft technique), with the aim to improve the primary stability and biological environment of the graft. METHODS During the procedure in the cranial quadrant of the acetabulum, a proximally hinged cortico-spongious plate is fashioned that is opened laterally and a wedge-shaped graft made from the femoral head is impacted. The precisely fitted graft has good primary rotational and cranial stability which is further improved by a bicortical screw. RESULTS The hypothesis is supported by examination on 3D models. Cadaver experimentations were performed on 19 hips of 10 cadavers, and stability testing was done on a further 20 hips of 10 cadavers with a material testing apparatus. Also the analysis of the biological and mechanical properties of the graft and the implant were examined. CONCLUSION Based on our results, it can be concluded that our technique provides good primary stability with a more favorable biological condition for bony incorporation compared to other bulk bone graft techniques.
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Affiliation(s)
- J Szabó
- Department of Orthopaedics, Medical and Health Science Center, University of Debrecen, Nagyerdei krt. 98, Debrecen, 4032, Hungary,
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Szabó J. 857 poster RADIOTHERAPY FOR SCHN IN MULTI-MORBID PATIENTS OR IN CASE OF CHEMOTHERAPY RESISTANT TUMOURS. Radiother Oncol 2011. [DOI: 10.1016/s0167-8140(11)70979-3] [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: 10/18/2022]
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Vucskits AV, Hullár I, Bersényi A, Andrásofszky E, Kulcsár M, Szabó J. Effect of fulvic and humic acids on performance, immune response and thyroid function in rats. J Anim Physiol Anim Nutr (Berl) 2011; 94:721-8. [PMID: 21073632 DOI: 10.1111/j.1439-0396.2010.01023.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Effect of humic acid (HA) and fulvic acid (FA) on production parameters, immune response and thyroid function of rats were investigated in two experiments. First experiment: control or 0.1%, 0.2%, 0.4%, 0.8% HA- or FA-supplemented diets. Second experiment: control and 0.4% HA- or FA-supplemented diets. The feeding period lasted 26 days in both trials. No significant changes were observed in production parameters. Ovalbumine antibody titre of rats on HA- or FA-supplemented diets showed dose-dependent (at 0.4% supplementation) and significant (p < 0.05) increase (350 and 418% respectively) over the control (100%). Dose-related increase of plasma TSH (r = 0.99), and decrease of the T(4)/T(3) ratio (r = -0.97) was observed in FA-supplemented rats. Second experiment: both FA and HA stimulated the immune response by the 14th day (mean values: control: 685.79; FA: 1131.37; HA: 1055.6099) and 26th day (control: 544.31; FA: 1969.83; HA: 1600.00). No significant differences were noted with lymphocyte stimulation test. Diameter of the 'B'-dependent lymphoid tissues in the ileum and spleen were significantly (p < 0.05) larger in both the FA- and HA-treated animals. Humic acid and FA supplementation resulted in strong humoral immune stimulation. Our data also indicate that FA content is responsible for the mild hypothyroid effect of humic substances.
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Affiliation(s)
- A V Vucskits
- Department of Animal Breeding, Nutrition and Laboratory Animal Science, Faculty of Veterinary Science, Szent István University, Budapest, Hungary.
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Sikovanyecz J, Horváth E, Pásztor N, Keresztúri A, Szabó J, Pál A. Fetomaternal transfusion after amniocentesis and cordocentesis. Ir J Med Sci 2010; 180:697-701. [DOI: 10.1007/s11845-010-0663-3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2007] [Accepted: 12/08/2010] [Indexed: 11/24/2022]
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Bakacsi Z, Kuti L, Pásztor L, Vatai J, Szabó J, Müller T. Method for the compilation of a stratified and harmonized soil physical database using legacy and up-to-date data sources. ACTA ACUST UNITED AC 2010. [DOI: 10.1556/agrokem.59.2010.1.5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
An attempt is outlined for the compilation of an integrated and harmonized stratified soil physical database serving hydrologic modeling, as the basis of estimating soil hydraulic parameters in the unsaturated zone. Due to the appropriate spatial and thematic resolution and data processing status, the Digital Kreybig Soil Information System (DKSIS) and Hungarian Agrogeological Database (HAD) were chosen as pedological and agrogeological data sources for describing the soil physical properties in the unsaturated zone. The DKSIS contains legacy soil data (as hy, pH, salt, OM, CaCO3content, etc.) in finely stratified resolution (3–5 soil layers within 1.5–2.0 m), but lacks particle size data. HAD has a coarser stratification (8–15 layers within 8–10 m) with detailed particle size data. The five-cleft FAO texture classification can serve as an interface in their joint application. The particle size and hy data pairs from the existing Hungarian Soil Monitoring (TIM) network made it possible to define the relation between FAO texture class vs.hyvalue, and based on the HYPRES database each FAO texture class can be characterized by typical Mualem-van Genuchten parameter sets (Wöstenet al., 1999). The compiled, harmonized database characterizes the distinguished soil and sediment layers – with a thickness of at least 10 cm – for a 690 km2large model area, describing their thickness and texture classes to the depth of the permanent groundwater level, in every single square kilometer cell of the model area. The compiled database is indispensable in the model simulation based analysis of regional water management problems like drought, flood and inland inundation.
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Affiliation(s)
- Zs. Bakacsi
- 1 Research Institute for Soil Science and Agricultural Chemistry (RISSAC) of the Hungarian Academy of Sciences GIS Lab H-1022 Budapest 15 Herman Ottó Str. Hungary
| | - L. Kuti
- 2 Geological Institute of Hungary Budapest Hungary
| | - L. Pásztor
- 1 Research Institute for Soil Science and Agricultural Chemistry (RISSAC) of the Hungarian Academy of Sciences GIS Lab H-1022 Budapest 15 Herman Ottó Str. Hungary
| | - J. Vatai
- 2 Geological Institute of Hungary Budapest Hungary
| | - J. Szabó
- 1 Research Institute for Soil Science and Agricultural Chemistry (RISSAC) of the Hungarian Academy of Sciences GIS Lab H-1022 Budapest 15 Herman Ottó Str. Hungary
| | - T. Müller
- 2 Geological Institute of Hungary Budapest Hungary
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Sallai A, Sólyom J, Dobos M, Szabó J, Halász Z, Ságodi L, Niederland T, Kozári A, Bertalan R, Ugocsai P, Fekete G. Y-chromosome markers in Turner syndrome: Screening of 130 patients. J Endocrinol Invest 2010; 33:222-7. [PMID: 19625757 DOI: 10.1007/bf03345783] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [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: 10/25/2022]
Abstract
BACKGROUND The presence of Y-chromosome material in patients with Turner syndrome (TS) is a risk factor for the development of gonadoblastoma. Cytogenetic analysis detects Y-chromosome mosaicism in about 5% of Turner patients. However, if Y-chromosome sequences are present in only a few cells, they may be missed by routine analysis. The use of molecular techniques to detect the presence of Y-chromosome fragments in such patients is becoming increasingly important. AIM The objective of our study was to analyze cryptic Y-chromosome derivatives in Hungarian TS patient population by real-time PCR (RT-PCR). SUBJECTS AND METHODS Cytogenetic and RT-PCR methods were used to examine peripheral blood DNA of 130 Hungarian patients with TS for the presence of Y-chromosome. With RT-PCR, 4 regions throughout the Y-chromosome were analyzed. RESULTS Initial cytogenetic karyotyping assessing 10-50 metaphases revealed 3 patients with Y-chromosome positivity. RT-PCR revealed further 6 patients with Y-chromosome, who were initially considered as Y-negatives by standard kayotyping. The consecutive cytogenetic analysis of a large number (about 100) of metaphases (in 5 patients) and/or FISH (in 6 patients) however, also confirmed the presence of the Y-chromosome in these patients. Prophylactic gonadectomy was carried out in all 9 patients and 1 of them was diagnosed as having bilateral gonadoblastoma without clinical symptoms. CONCLUSIONS We recommend a routine molecular screening for hidden Y-chromosome sequences in Turner patients, who are negative for Y-chromosome by conventional cytogenetic analysis, in order to calculate the future risk of developing gonadoblastoma.
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Affiliation(s)
- A Sallai
- 2nd Department of Pediatrics, Semmelweis University, H-1094 Budapest, Hungary.
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Pásztor L, Szabó J, Bakacsi Z. Digital processing and upgrading of legacy data collected during the 1:25 000 scale Kreybig soil survey. ACTA ACUST UNITED AC 2010. [DOI: 10.1556/ageod.45.2010.1.18] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Szabó J, Fóris G, Mezösi E, Nagy EV, Paragh G, Sztojka I, Leövey A. Parameters of respiratory burst and arachidonic acid metabolism in polymorphonuclear granulocytes from patients with various thyroid diseases. Exp Clin Endocrinol Diabetes 2009; 104:172-6. [PMID: 8740942 DOI: 10.1055/s-0029-1211440] [Citation(s) in RCA: 19] [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: 02/01/2023]
Abstract
The oxidative processes (oxygen consumption, superoxoid anion generation, arachidonic acid cascade) of human polymorphonuclear granulocytes (PMNs) obtained from patients suffering from thyroid disorders of autoimmune origin (Graves' disease and Hashimoto's thyroiditis), and non autoimmune origin (toxic adenoma) were investigated. All Graves' and toxic adenoma patients were hyperthyroid. Hashimoto's thyroiditis patients were euthyroid. Healthy age and sex matched volunteers served as controls. The results are as follows: 1) In PMNs from both hyperthyroid groups (Graves' disease and toxic adenoma), independently from the autoimmune origin of the disease, a significantly increased Antimycin A sensitive mitochondrial oxygen consumption and a slightly increased superoxide anion generation were detected. 2) In both autoimmune thyroid disease groups (Graves' disease and Hashimoto's thyroiditis)--depending on the functional state of the thyroid gland--a significantly altered intracellular killing activity was measured. 3) An increased arachidonic acid cascade--triggered by opsonized zymozan (OZ)--was detected in both autoimmune thyroid diseases. The increased arachidonic acid cascade was sensitive to phospholipase A2 inhibiting Mepacrin treatment. 4) The PMNs from both autoimmune thyroid diseases produced large amount of leukotriens (LTs)--LTC4 and LTB4--after stimulation through their Fc receptors but the synthesis of prostagalandins (PGs) has not changed. There are no data indicating local, specific effects of circulating leukotriens in the thyroid gland itself, but based on authors' data, their general, regulating role on both the endocrine-- as well as on the immune system--seems to be plausible.
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Affiliation(s)
- J Szabó
- First Department of Medicine, University Medical School, Debrecen, Hungary
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Szabó J, Dombrádi Z, Dobay O, Orosi P, Kónya J, Nagy K, Rozgonyi F. Phenotypic and genetic characterisation of methicillin-resistant Staphylococcus aureus strains isolated from the university hospitals of Debrecen. Eur J Clin Microbiol Infect Dis 2008; 28:129-36. [DOI: 10.1007/s10096-008-0588-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2008] [Accepted: 06/16/2008] [Indexed: 11/28/2022]
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Szabó J, Pálfalvi J, Dudás B, Akatov YA, Eördögh I. Cosmic ray detection on the ISS by a 3 axes track etch detector stack and the complementary calibration studies. RADIAT MEAS 2008. [DOI: 10.1016/j.radmeas.2008.02.016] [Citation(s) in RCA: 7] [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: 11/27/2022]
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Abstract
In the frame of a European Space Agency (ESA) project called 'Biology and Physics in Space', a returning satellite, Foton-M2, was orbiting a container, the BIOPAN-5, loaded with biological experiments and facilities for radiation dosimetry (RADO) in the open space. One of the RADO experiments was dedicated to the detection of the primary cosmic rays and secondary neutrons by a track etch detector stack. The system was calibrated at high-energy particle accelerators and neutron generators. The developed detectors were investigated by an image analyser, and from the track parameters the linear energy transfer spectra and the absorbed dose were determined (26 microGy/d). Also, the neutron flux was estimated below 5 MeV and found to be 2.4 cm(-2) s(-1) directly from the space. The construction of the stack allowed to investigate the neutrons also from the direction of the carrying satellite, where the flux was found somewhat higher.
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Affiliation(s)
- J K Pálfalvi
- MTA KFKI-Atomic Energy Research Institute, PO Box 49, H-1525 Budapest, Hungary.
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Szabó J, Mezei K, Thuróczy G, Mezei G. Occupational 50 Hz magnetic field exposure measurements among female sewing machine operators in Hungary. Bioelectromagnetics 2006; 27:451-7. [PMID: 16622866 DOI: 10.1002/bem.20223] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [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: 11/08/2022]
Abstract
Occupational magnetic field (MF) exposure is less thoroughly characterized in occupations typically held by women. Our objective was to characterize occupational 50 Hz MF personal exposure (PE) among female sewing machine operators. We measured the full shift PE of 51 seamstresses, who worked in two shifts (6-14 and 14-22 h) according to their normal work routine. Measurements were conducted using EMDEX PAL meters at chest level. The average duration of the measurement periods was 449 min (range 420-470). The average arithmetic mean exposure for all women was 0.76 microT (range 0.06-4.27). The average of maximum values was 4.30 microT (range 0.55-14.80). Women working with older sewing machines experienced higher exposure than women working on newer sewing machines. For women (n = 10) who operated sewing machines produced in 1990 or earlier, the average arithmetic mean exposure was 2.09 microT, and for women (n = 41) who operated sewing machines produced after 1990, the average arithmetic mean was 0.43 microT. We conclude that women working as sewing machine operators experience higher than average occupational MF exposure compared to other working women. Most important determinant of the women's personal MF exposure was the age of the sewing machine the women operated.
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Affiliation(s)
- J Szabó
- National Research Institute for Radiobiology and Radiohygiene, Budapest, Hungary.
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Pálfalvi JK, Akatov Y, Szabó J, Sajó-Bohus L, Eördögh I. Detection of primary and secondary cosmic ray particles aboard the ISS using SSNTD stacks. Radiat Prot Dosimetry 2006; 120:427-32. [PMID: 16735560 DOI: 10.1093/rpd/nci673] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
To study the radiation environment inside the International Space Station, solid state nuclear track detector stacks were used. Within the BRADOS experiments, Phase 1, seven stacks were exposed at different locations of the Russian segment 'Zvezda' for 248 days in 2001. It was supposed that the radiation field inside the ISS was composed from primary cosmic ray particles penetrating the wall of the ISS and secondaries, mainly neutrons induced by primaries in the wall and other structural materials surrounding the detectors. Based on the calibration made by utilising the high energy neutron reference field CERF at CERN (Geneva, Switzerland), the tracks induced by neutrons were separated from those induced by primary particles. Thus, the stacks, on one hand, provided the secondary neutron ambient dose equivalent. On the other hand, from the analysis of the rest of the tracks, the linear energy transfer spectra were computed and the flux and the dose of the primary particles were determined as shown in this paper.
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Affiliation(s)
- J K Pálfalvi
- KFKI-Atomic Energy Research Institute, P.O. Box 49, H-1525 Budapest, Hungary.
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Sajó-Bohus L, Pálfalvi J, Akatov Y, Arevalo O, Greaves E, Németh P, Palacios D, Szabó J, Eördögh I. Neutron-induced complex reaction analysis with 3D nuclear track simulation. RADIAT MEAS 2005. [DOI: 10.1016/j.radmeas.2005.02.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Pálfalvi JK, Akatov Y, Szabó J, Sajó-Bohus L, Eördögh I. Evaluation of solid state nuclear track detector stacks exposed on the international space station. Radiat Prot Dosimetry 2004; 110:393-397. [PMID: 15353680 DOI: 10.1093/rpd/nch140] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The aim of the study was to investigate the contribution of secondary neutrons to the total dose inside the International Space Station (ISS). For this purpose solid-state nuclear track detector (SSNTD) stacks were used. Each stack consisted of three CR-39 sheets. The first and second sheets were separated by a Ti plate, and the second and third sheets sandwiched a Lexan polycarbonate foil. The neutron and proton responses of each sheet were studied through MC calculations and experimentally, utilising monoenergetic protons. Seven stacks were exposed in 2001 for 249 days at different locations of the Russian segment 'Zvezda'. The total storage time before and after the exposure onboard was estimated to be seven months. Another eight stacks were exposed at the CERF high-energy neutron field for calibration purposes. The CR-39 detectors were evaluated in four steps: after 2, 6, 12 and 20 h etching in 6 N NaOH at 70 degrees C (VB = 1.34 microm h(-1)). All the individual tracks were investigated and recorded using an image analyser. The stacks provided the averaged neutron ambient dose equivalent (H*) between 200 keV and 20 MeV, and the values varied from 39 to 73 microSv d(-1), depending on the location. The Lexan detectors were used to detect the dose originating from high-charge and high-energy (HZE) particles. These results will be published elsewhere.
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Affiliation(s)
- J K Pálfalvi
- KFKI, Atomic Energy Research Institute, P.O.Box 49, H-1525 Budapest, Hungary.
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Sikovanyecz J, Horváth E, Wayda K, Gellén J, Pál A, Szabó J. Increased nuchal translucency and decreased fetomaternal transfusion after chorionic villus sampling. Ultrasound Obstet Gynecol 2003; 21:455-458. [PMID: 12768556 DOI: 10.1002/uog.117] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
OBJECTIVE To investigate the relationship between nuchal translucency (NT) and fetomaternal transfusion (FMT) after chorionic villus sampling (CVS). METHODS The level of FMT was determined in 272 viable, singleton pregnancies in which 10-14-week ultrasound scanning, NT measurement and CVS for fetal karyotyping had been performed. The pre-CVS NT was measured transvaginally, and the women were divided into two groups, i.e. those with NT < 2.5 mm (Group 1) or >or= 2.5 mm (Group 2). The level of FMT was determined via the maternal serum alpha-fetoprotein levels before and after CVS. FMT was analyzed in relation to the pre-CVS NT. RESULTS Of the 272 pregnancies, 213 were in Group 1 and 59 in Group 2. The mean levels of FMT after CVS were 23.3 +/- 12.2 and 5.4 +/- 2.9 micro L in Groups 1 and 2, respectively (P < 0.01). An FMT > 100 micro L was found in 19 cases in Group 1, whereas the maximum in Group 2 was 67.2 micro L. Aneuploidies were diagnosed in 17 cases, 15 (88.2%) of them in Group 2. When the pregnancies with adverse outcome were excluded from the two groups, a higher level of FMT was observed in Subgroup 1 than in Subgroup 2 (P < 0.01). CONCLUSIONS The mean level of FMT after CVS was significantly lower in pregnancies with an increased pre-CVS NT, a relationship observed in euploid pregnancies also. An increased pre-CVS NT seems to be inversely correlated with the FMT increase after CVS. Further studies are planned to investigate the background to this phenomenon.
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Affiliation(s)
- J Sikovanyecz
- Department of Obstetrics and Gynaecology, University of Szeged Faculty of Medicine, Albert Szent-Györgyi Medical and Pharmaceutical Centre, Szeged, Hungary
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Abstract
AIMS To analyse the type and degree of inflammatory reaction initiated by four sealers. METHODOLOGY Twenty-four root canals of Macaca mulatta monkeys were filled within the canal and eight were overfilled with AH26, Apexit, Endomethasone or Grossman's sealers. The result of the treatment was evaluated after 6 months by histological assessment of the periapical tissues. RESULTS In the group of root canals filled within the root, no inflammatory reaction was detected in specimens of Apexit and Grossman's sealers, but the other two sealers initiated different degrees of lymphocytic/plasmocytic tissue reactions. Endomethasone initiated a mild lymphocytic/plasmocytic reaction in three of the nine cases and AH26 caused mild lymphocytic/plasmocytic infiltration in two of the seven cases. In the group of overfilled root canals, all four sealers initiated inflammatory reactions. The periapical tissue reactions of overfilled root canals were similar to reactions detected in cases filled within the canal. However, additional histological features developed in specimens of Endomethasone and AH26: Endomethasone initiated a foreign body-type granulomatous reaction around the sealer particles and AH26 particles were engulfed by macrophages. The overfilled root canals of Apexit and Grossman's sealers initiated only lymphocytic/plasmocytic reactions. CONCLUSIONS This study suggests that sealers with different chemical compositions initiate different histological reactions. It also emphasizes the importance of confining root filling to the canal system because all sealers initiate inflammatory reactions when they are present in the apical tissues
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Affiliation(s)
- M Bernáth
- Department of Dentistry and Oral Surgery, Faculty of Medicine, Pécs University, Pécs, Hungary.
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Abstract
The risk to human health of exposure to low-level radiation is not precisely known yet. One way of studying this is to carry out in vitro biological experiments with cell cultures and to extend the conclusions to biological models. To relate the macroscopically deteminable 'low dose' to the damage of cells caused by a certain type of ionising particle is nearly impossible. therefore the number of hits and the imparted energy are the significant quantities. They can be estimated by particle transport calculations and by direct measurements. The effect of low dose was investigated in radio-adaptation experiments when mono-layers of different unsynchronised cell cultures were irradiated by neutrons produced in the filtered beam of the Budapest Research Reactor (BRR). The energy deposition was investigated by replacing the mono-layers with etched track detectors of the CR-39 type.
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Affiliation(s)
- J Pálfalvi
- Atomic Energy Research Institute, P.O. Box 49, H-1525 Budapest, Hungary.
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Paragh G, Balogh Z, Kovács E, Szabolcs M, Szabó J, Csapó K, Fóris G. Disturbed regulation of cholesterol synthesis in monocytes of obese patients with hypercholesterolemia. Metabolism 2003; 52:1-6. [PMID: 12524654 DOI: 10.1053/meta.2003.50000] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The aim of the present study was to clarify the influence of obesity on the functions of low-density lipoprotein receptors (LDL-R) and 3-hydroxy-3-methylglutarate-coenyzme A (HMG-CoA) reductase both in healthy control subjects and in patients with hypercholesterolemia (HC). Experiments were performed on monocytes of 15 non-obese (C I) and 11 obese (C II) healthy control subjects and on 22 non-obese (HC I) and 26 obese (HC II) patients with HC. [(125)I]LDL was used to determine LDL-R activity by measuring binding and intracellular degradation. The rate of endogenous cholesterol synthesis was measured using [(14)C]acetate incorporation into the cholesterol fraction of monocytes. The binding ability of [(125)I]LDL was identical across all groups. The [(14)C]acetate incorporation in resting monocytes was increased only in obese HC group. The 50-microg/mL LDL protein-induced inhibition of [(14)C]acetate incorporation was significantly diminished (P <.001) in the same group. A strong positive correlation was detected between the [(14)C]acetate incorporation by resting cells and LDL-induced inhibition in all groups except the obese HC group, in which their correlation was negative (P <.001). Furthermore, in the obese HC group, a significant positive correlation was detected between body mass index (BMI) and the basal level of [(14)C]acetate incorporation, whereas a negative correlation was found between BMI and LDL-induced inhibition of [(14)C]acetate incorporation. The present data suggest that in patients with HC the concomitant obesity results in dysregulation of cholesterol homeostasis, which may contribute to the accelerated atherosclerosis.
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Affiliation(s)
- G Paragh
- First Department of Medicine, CSL, Experimental Pathology, University of Debrecen, Medical and Health Science Center, Debrecen, Hungary
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Abstract
Sensitive detection methods, such as DNA PCR and RNA PCR suggest that vertical transmission of human immunodeficiency virus (HIV) occurs at three major time periods; in utero, around the time of birth, and postpartum as a result of breastfeeding (Fig. 1). Detection of proviral DNA in infant's blood at birth suggests that transmission occurred prior to delivery. A working definition for time of infection is that HIV detection by DNA PCR in the first 48 h of life indicates in utero transmission, while peripartum transmission is considered if DNA PCR is negative the first 48 h, but then it is positive 7 or more days later [1]. Generally, in the breastfeeding population, breast milk transmission is thought to occur if virus is not detected by PCR at 3-5 months of life but is detected thereafter within the breastfeeding period [2]. Using these definitions and guidelines, studies has suggested that in developed countries the majority, or two thirds of vertical transmission occur peripartum, and one-third in utero [3-6]. The low rate of breastfeeding transmission is due to the practice of advising known HIV-positive mothers not to feed breast milk. However, since the implementation of antiretroviral treatment in prophylaxis of HIV-positive mothers, some studies have suggested that in utero infection accounts for a larger percentage of vertical transmissions [7]. In developing countries, although the majority of infections occurs also peripartum, a significant percentage, 10-17%, is thought to be due to breastfeeding [2, 8, 9].
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Affiliation(s)
- F D Tóth
- Institute of Microbiology, Medical and Health Science Center, University of Debrecen, Nagyerdei krt. 98, H-4012 Debrecen, Hungary
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Abstract
AIM The purpose of this study was to compare the shaping characteristics of Ni-Ti K-files and Ni-Ti S-files manipulated by hand. METHODOLOGY A total of 60 extracted human roots were embedded in resin blocks. The embedded roots were divided into three groups: (i) roots with straight; (ii) apically curved; and (iii) continuously curved canals. Each of the three groups was randomly divided into two subgroups; one subgroup in each group was prepared with Ni-Ti K-files and the other with Ni-Ti S-files. The files were used with a step-back technique and enlarged so that the master apical file was size 30, and the canals were stepped back to size 40. The performance of the files was assessed by the superimposition of projected radiographs taken in bucco-lingual and mesio-distal directions before and after the preparation. The results were analysed statistically using analysis of covariance and Duncan's multiple range test. RESULTS Although canal preparation using Ni-Ti K-files was quicker, there were no statistically significant differences between file types. The Ni-Ti S-file removed significantly more material at the most coronal level (P < 0.05). There were minor differences between instruments at the apical level. Only in the proximal view of apically curved canals prepared with Ni-Ti S-files was significantly more dentine removed from the outer aspect of the curvature (P < 0.05). At the middle level (wide danger zone) the Ni-Ti S-files removed more dentine from the inner aspect of the curvature in those roots with apically curved canals. CONCLUSIONS Under the conditions of this study, preparation with Ni-Ti K-files produced more appropriate shapes in roots with apically curved canals than Ni-Ti S-files.
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Affiliation(s)
- C Dobó-Nagy
- Department of Prosthetic Dentistry, Faculty of Dentistry, Semmelweis University, Budapest, Hungary.
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Németh T, Szabó J, Pásztor L, Bakacsi Z. Elaboration of a complex GIS application in a catchment area. Water Sci Technol 2002; 45:133-140. [PMID: 12079095] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Rearrangement of land resources after political changes has not yet been finished in Hungary. It is almost impossible to collect information necessary for planning activities on outer areas of settlements. The data are distributed among various organizations and can be found in diverse forms or there are no available data at all. However water quality protection has become legally ordered concerning municipal activities around Lake Balaton which is considered as the most important recreation area and tourist target in Hungary and is also affected by a number of factors providing sources of environmental conflicts. Settlements in a catchment area (Tetves Creek) on the southern shoreline of Lake Balaton in Central Hungary tendered a complex project for collecting sources of authentic data of the Hungarian rural areas along with systematizing and saving these data in a uniform GIS. An application using Autodesk MapGuide Program for Internet realization was developed. The implemented web-based system can be used in Internet and Intranet environments.
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Affiliation(s)
- T Németh
- Research Institute for Soil Science and Agricultural Chemistry of the Hungarian Academy of Sciences, Budapest
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Dobó Nagy C, Ledeczky G, Sulyok P, Szabó J. [Mathematical description of human root canal curvatures]. Fogorv Sz 2001; 94:235-8. [PMID: 11847965] [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] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
There is a necessity of a mathematical formula for the description of root canal curvatures. The aim of this study was to give a mathematical description of root canal forms. The measurements of 60 roots were conducted on isometric radiographs taken from the clinical view. Seven points of the imaginary axis were approximated using fourth-degree polynomial functions. Fourth-degree approximation for the description of the shape of root canal curvatures proved to be exact and reliably repeatable. This method may serve the classification of root canal forms as well as the description of the spatial curve of root canals.
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Affiliation(s)
- C Dobó Nagy
- Semmelweis Egyetem Budapest, Fogpótlástani Klinika, Budapest
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Wayda K, Keresztúri A, Orvos H, Horváth E, PAl A, Kovács L, Szabó J. Four years experience of first-trimester nuchal translucency screening for fetal aneuploidies with increasing regional availability. Acta Obstet Gynecol Scand 2001; 80:1104-9. [PMID: 11846706 DOI: 10.1034/j.1600-0412.2001.801205.x] [Citation(s) in RCA: 21] [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: 11/23/2022]
Abstract
BACKGROUND A prospective screening study was carried out at the regional genetic and perinatal center in South Hungary in order to determine the efficiency of first-trimester nuchal translucency screening for fetal aneuploidies, following augmentation of the availability of nuchal translucency screening in the region by the inclusion of newly-trained hospital sonographers. METHODS Nuchal translucency thickness was measured by transvaginal sonography in 7,044 women with singleton or multiple pregnancies at weeks 10-12. Fetal karyotyping was performed when the nuchal translucency was . or = 2.5 mm, and in women with fetuses at high cytogenetic risk. RESULTS Follow-up was performed in 6,841 of the 7,044 screened women. An abnormal karyotype was found in 33 cases (0.48%). The level of increased nuchal translucency was 4.5% at a cutoff of > or = 2.5 mm, and 2.8% at a cutoff of > or = 3 mm. Seventeen cases of trisomy 21, eight of trisomy 18, four of trisomy 13, one of 45,X, one of triploidy and two cases with other chromosomal abnormalities were detected. In the 33 fetuses with a chromosomal abnormality, the nuchal translucency thickness was <2.5 mm in a case of trisomy 18, > or = 2.5 mm in 32 cases and > or = 3 mm in 28 cases. With cutoffs of 2.5 mm and 3 mm, the sensitivity was 96.97% and 84.85%, respectively. CONCLUSIONS Application of a nuchal translucency thickness cutoff of 2.5 mm is highly efficient for the screening of fetal aneuploidies at 10-12 weeks. This efficiency can be maintained by increasing the regional availability of nuchal translucency screening through the inclusion of newly-trained hospital sonographers.
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Affiliation(s)
- K Wayda
- Department of Medical Genetics, Albert Szent-Györgyi Medical and Pharmaceutical Center, University of Szeged, Szeged, Hungary
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Szende B, Romics I, Minik K, Szabó J, Torda I, Lovász S, Szomor L, Tóth L, Bély M, Kerényi T, Bartók K, Végh A. Repeated biopsies in evaluation of therapeutic effects in prostate carcinoma. Prostate 2001; 49:93-100. [PMID: 11582587 DOI: 10.1002/pros.1122] [Citation(s) in RCA: 21] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND Apoptosis is one of the major events following total androgen blockade (TAB). The aim of this study was to determine the predictive value of some histological parameters including apoptosis and gene products which influence apoptosis, based on repeated biopsies taken from the same patients. METHODS At the time of diagnosis by needle biopsy TNM stage, serum PSA, Gleason's grade, apoptotic and mitotic index, Ki67, p53, and bcl(2) expression were investigated in 60 prostate carcinoma patients. Antiandrogen therapy supplemented with surgical or chemical castration was administered. Serum PSA-test and needle biopsy were repeated 13-14 weeks after starting the therapy, simultaneously with determination of the apoptotic and mitotic index, Ki67, p53, and bcl(2) expression. RESULTS Forty-seven patients were alive at the end of the study, 13 patients died. Decrease in mitotic, increase in apoptotic index predicted favourable long-term response to antiandrogen therapy. Lower Ki67 and (mutant) p53 expression in the first and also in the second biopsy pointed to favourable effect of antiandrogen treatment. Since the ratio between Ki67 and apoptotic index strongly decreased in the survivors upon therapy, changes in Ki67/apoptosis ratio is recommended as a histologically detectable predictive factor. bcl(2) expression did not show significant correlation with the outcome of the disease. CONCLUSIONS Histological evaluation of mitotic and apoptotic index, Ki67, and p53 expression in repeated biopsies contributes to predicting the value of the actual treatment and may be useful to institute alterations in therapy.
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Affiliation(s)
- B Szende
- 1st Institute of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary.
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Bácsi A, Ebbesen P, Szabó J, Beck Z, Andirkó I, Csoma E, Tóth FD. Pseudotypes of vesicular stomatitis virus-bearing envelope antigens of certain HIV-1 strains permissively infect human syncytiotrophoblasts cultured in vitro: implications for in vivo infection of syncytiotrophoblasts by cell-free HIV-1. J Med Virol 2001; 64:387-97. [PMID: 11468721 DOI: 10.1002/jmv.1063] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [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: 11/06/2022]
Abstract
Intrauterine infection of the fetus is clearly an important mode of vertical transmission of human immunodeficiency virus type 1 (HIV-1). The syncytiotrophoblast layer of the human placenta must be traversed by HIV-1 in order to reach underlying cells and fetal capillaries. Although HIV-1 has been detected in the syncytiotrophoblast layer in situ, there is conflicting evidence regarding infection of syncytiotrophoblast cells with cell-free virus. The phenotypic mixing between HIV-1 and vesicular stomatitis virus (VSV) has been exploited to assay the susceptibility of human term syncytiotrophoblast cells to penetration by various strains of HIV-1. VSV(HIV-1(IIIB)) and VSV(HIV-1(Ba-L)) pseudotypes were found to enter syncytiotrophoblast cells. In contrast, VSV pseudotyped with envelope glycoproteins of RF, MN, or Ada-M strains of HIV-1 did not infect syncytiotrophoblasts. Plating efficiency of VSV(HIV-1(IIIB)) and VSV(HIV-1(Ba-L)) was 10-fold lower on syncytiotrophoblasts than on T-cells and macrophages, respectively. Incubation of VSV(HIV-1(IIIB)) and VSV(HIV-1(Ba-L)) viruses with appropriate HIV-1 neutralizing sera before infection strongly inhibited entry of pseudotyped VSV into syncytiotrophoblast cells. These findings demonstrated that infection of syncytiotrophoblasts with VSV(HIV-1) pseudotypes was mediated by Env from IIIB and Ba-L strains of HIV-1. Monoclonal antibodies (MAb) to CD4, CXCR4, CCR5, and CCR3 were tested for their ability to block VSV(HIV-1) infection of syncytiotrophoblast cells. Neither the anti-CD4 nor the anti-CXCR4, anti-CCR5, and anti-CCR3 MAb had any inhibitory effect on infection of syncytiotrophoblast cells with VSV(HIV-1) pseudotypes. Results from this study suggest that cell-free HIV-1 can enter syncytiotrophoblasts and the susceptibility of these cells to penetration by the virus is strain dependent. Pseudotype infection merely demonstrates that the first steps in HIV-1 replication are possible in syncytiotrophoblast cells.
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Affiliation(s)
- A Bácsi
- Institute of Microbiology, University Medical School, Debrecen, Hungary
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Abstract
Radiodiagnostic methods have not been used previously for studying the anatomy and diseases of the swimbladder of freshwater fish species. In this study, the radiographic anatomy of the swimbladder and species-related differences in swimbladder structure were studied on plain radiographs taken of 12 Hungarian fish species of major economic importance. Changes observed by radiography were also studied by conventional parasitological methods. The radiodiagnostic method reported here appears to be a useful complement to diagnostic examinations that have been based merely on dissection so far. It enables evaluation of the pathological lesions in live condition, without causing damage to the fish.
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Affiliation(s)
- A Beregi
- Department of Clinic of Internal Medicine, Faculty of Veterinary Science, Szent István University, Budapest, H-1400, P.O. Box 2, Hungary.
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Szabó J, Cervenák L, Tóth FD, Prohászka Z, Horváth L, Kerekes K, Beck Z, Bácsi A, Erdei A, Peerschke EI, Füst G, Ghebrehiwet B. Soluble gC1q-R/p33, a cell protein that binds to the globular "heads" of C1q, effectively inhibits the growth of HIV-1 strains in cell cultures. Clin Immunol 2001; 99:222-31. [PMID: 11318594 DOI: 10.1006/clim.2001.5013] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
C1q and the outer envelope protein of HIV, gp120, have several structural and functional similarities. Therefore, it is plausible to assume that proteins that are able to interact with C1q may also interact with isolated gp120 as well as the whole HIV-1 virus. Based on this hypothesis, we studied the potential ability of the recombinant form of the 33-kDa protein, which binds to the globular "heads" of C1q (gC1q-R/p33), to inhibit the growth of different HIV-1 strains in cell cultures. gC1q-R/p33 was found to effectively and dose-dependently inhibit the production of one T-lymphotropic (X4) and one macrophage-tropic (R5) strain in human T cell lines (MT-4 and H9) and human monocyte-derived macrophage cultures, respectively. At a concentration range of 5-25 microg/ml, gC1q-R caused a marked and prolonged suppression of virus production. The extent of inhibition was enhanced when gC1q-R was first incubated with and then removed from the target cell cultures before virus infection, compared to that when the cells were infected with gC1q-R-HIV mixtures. The extent of inhibition was comparable to that of the Leu3a anti-CD4 antibody. Addition of gC1q-R to the cell cultures on day 1 or 2 after infection induced markedly less inhibition of HIV-1 growth than pretreatment of the cells just before or together with the infective HIV strains. In ELISA experiments, gC1q-R did not bind to a solid-phase recombinant gp120 while strong and dose-dependent binding of gC1q-R to solid-phase CD4 was observed. Our present findings indicate that gC1q-R is an effective inhibitor of HIV-1 infection, which prevents viral entry by blocking the interaction between CD4 and gp120. Since gC1q-R is a human protein, it is most probably not antigenic in humans. It would seem logical, therefore, to consider gC1q-R or its fragments involved in the CD4 binding as potential therapeutic agents.
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Affiliation(s)
- J Szabó
- Institute of Microbiology, University Medical School, Debrecen, Hungary
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Abstract
OBJECTIVE To study the extent of fetomaternal transfusion and the outcome of pregnancy after cordocentesis. MATERIAL AND METHODS 268 women underwent percutaneous fetal umbilical cord blood sampling for fetal karyotyping between 15 and 26 gestations of weeks. Complete follow-up was available in 221 (82.5%) of the cases. Cordocentesis was performed under continuous real-time ultrasound guidance. The duration of the procedure and the post-procedural bleeding time was counted in seconds. Fetomaternal transfusion was calculated by using the measurements of the maternal serum levels of alpha-fetoprotein before and after the procedure. The data were analyzed by Student's t and multiple regression tests. RESULTS The maximum and mean amounts of fetomaternal transfusion were 1.067 and 0.061 ml, respectively. Twenty percent or more alpha-fetoprotein elevation was in 35.4% of the cases. Positive correlation was found between bleeding time after cordocentesis and fetomaternal transfusion (r = 0.174, p < 0.0129) as well as between the duration of the procedure (r = 0.165, p < 0.0171) and the amount of fetomaternal transfusion. Comparing the cordocentesis at the placental insertion site and at the free cord loop, a smaller amount of fetomaternal transfusion was observed (p < 0.0123) in the latter. Transplacental passage was associated with a higher amount of fetomaternal transfusion (p < 0.0067). No association was found between the extent of fetomaternal transfusion and the outcome of pregnancy. The fetal loss related to the cordocentesis was 0.50%. CONCLUSIONS The extent of fetomaternal transfusion was influenced by the subsequent four parameters: procedural time, bleeding time, puncture site and transplacental penetration. The lack of the association between the degree of fetomaternal transfusion and the outcome of pregnancy, along with the low (0.50%) post-procedural fetal loss rate, suggest that cordocentesis is clinically a safe procedure.
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Affiliation(s)
- J Sikovanyecz
- Department of Obstetrics and Gynaecology, University of Szeged Faculty of Medicine, Albert Szent-Györgyi Medical and Pharmaceutical Center, Szeged, Hungary
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Jeney F, Bazsó-Dombi E, Oravecz K, Szabó J, Nagy IZ. Cytochemical studies on the fibroblast-preadipocyte relationships in cultured fibroblast cell lines. Acta Histochem 2000; 102:381-9. [PMID: 11145531 DOI: 10.1078/0065-1281-00567] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [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: 11/18/2022]
Abstract
The theoretical basis of adipogenesis has always been a matter of debate. One concept suggests that all types of adipocytes are derived from undifferentiated connective tissue cells, whereas another concept suggests that adipocytes develop from specialized cells only that are able to accumulate fat. Many conflicting data have been published with respect to the transition of fibroblasts into preadipocytes. For example, this transition has been declared as impossible for dermal and perimysial fibroblasts. The present study analysed spontaneous accumulation of fat in various types of fibroblasts from different origin (retroocular, skin, NIH/3T3, and L929). It was found that intense Oil Red O-positive triglyceride-containing droplets accumulated in practically all types of fibroblasts provided that the cells were cultured on glass surface. When the cells were cultured on plastic surfaces, lipid staining was inhibited in a variable manner: inhibition was virtually complete in skin fibroblasts, whereas in other types of fibroblasts, inhibition was only partial. It is concluded that all types of fibroblasts can accumulate fat spontaneously, and thus can be considered as preadipocytes. Therefore, interpretations of data obtained with cultures of fibroblasts with respect to adipogenesis have to be reconsidered.
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Affiliation(s)
- F Jeney
- Department of Gerontology (VILEG, Hungarian Section), University Medical School, Debrecen.
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41
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Abstract
Knowledge of the three-dimensional (3D) morphology of root canals is important for successful endodontic treatment. The objective of the present study was to determine the 3D root canal axis mathematically. Two views (mesiodistal and buccolingual) of digitized images were taken from extracted natural human teeth. Geometric reconstruction to standardize projection geometry was conducted on images. Because 90-degree turn-around image pairs are Monge images of a given root canal, these Monge images were positioned using photogrammetric methods. Each well-ordered axis pair of a given root canal was put into a common coordinate system resulting in 3D polynomial function of the actual root canal. On the basis of the results gained using 10 samples evaluated with the Friedman statistical test, this description seems to be reproducible. The 3D representation of the root canal may help the clinicians in choosing the optimal instruments and shaping techniques. The root canal axis that is described by the 3D function forms a basis for determination of curvature values and torsion values in each of the axis points. Evaluating these values may also yield a new type of classification.
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Affiliation(s)
- C Dobó-Nagy
- School of Dentistry, University of Medicine, Debrecen, Hungary
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42
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Tóth A, Szabó J. [Ethical aspects of prenatal screening for Down's syndrome]. Orv Hetil 2000; 141:2293-8. [PMID: 11076495] [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: 02/18/2023]
Abstract
Trisomy 21, the chromosomal base of Down's syndrome, results in severe mental and physical handicap. Owing to the development of medical genetics reliable screening and diagnostic procedures for the detection of the disorder are available in Hungary. To achieve the goals of prenatal screening it is important to address the main ethical issues arising through the application of technical-professional skills. The core objective of prenatal screening for Down's syndrome is to give information about the genetic condition of the fetus in order to enhance the autonomy of the parents in family planning. Screening programs should respect the ethical requirements of the principles of "do no harm", beneficence and autonomy of the patients, which are the most important ethical norms of doctor-patient relationship. Regarding the social aspects of screening it is essential to claim that voluntary participation and nondirective genetic counselling can exclude eugenic purposes. Though introduction of prenatal tests does not imply the discrimination of the disabled, anxiety of handicapped people deserves more attention. Abortion of affected fetuses isn't among the objectives of prenatal genetic screening but patient's autonomy is supported in decisions concerning the future of the pregnancy. Social justice can be taken into consideration by providing the test to all women without respect to their social position, educational level or their age. An open debate about the issues of prenatal screening for Down's syndrome could promote the formation of a consensus between professionals and the public.
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Affiliation(s)
- A Tóth
- Szegedi Tudományegyetem, Altalános Orvostudományi Kar, Szent-Györgyi Albert Orvos- és Gyógyszerésztudományi Centrum
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Abstract
Systematic random rectal ultrasound directed map-biopsy of the prostate was performed in 77 RDE (rectal digital examination) positive and 25 RDE negative cases, if applicable. Hypoechoic areas were found in 30% of RDE positive and in 16% of RDE negative cases. The score for carcinoma in the hypoechoic areas was 6.5% in RDE positive and 0% in RDE negative cases, whereas systematic map biopsy detected 62% carcinomas in RDE positive, and 16% carcinomas in RDE negative patients. The probability of positive diagnosis of prostate carcinoma increased in parallel with the number of biopsy samples/case. The importance of systematic map biopsy is emphasized.
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Affiliation(s)
- J Szabó
- Central Military Hospital, Department of Urology, Budapest, Hungary
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Beck Z, Kiss A, Tóth FD, Szabó J, Bácsi A, Balogh E, Borbély A, Telek B, Kovács E, Oláh E, Rak K. Alterations of P53 and RB genes and the evolution of the accelerated phase of chronic myeloid leukemia. Leuk Lymphoma 2000; 38:587-97. [PMID: 10953980 DOI: 10.3109/10428190009059278] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [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: 11/13/2022]
Abstract
Using the single-strand conformation polymorphism and heteroduplex analyses, the P53 and RB genes were analyzed in cell samples from twenty-eight patients with chronic myeloid leukemia (CML) both at diagnosis and at the onset of accelerated phase (AP) of the disease. No alterations of the P53 or RB genes were found in any of the chronic phase (CP) samples. Structural abnormalities of the P53 gene were observed in ten of twenty-eight AP samples within exons 4, 5, 7 and 9. Of the ten cases of AP disease with altered P53 genes, five patients also suffered from the deletion of the other allele. Alterations of the RB gene could be detected in six AP samples, and aberrant band patterns were found in the analysis of exons 2, 3, 4, 6, 7, 13, 14, 17, 21 and 26. Among the six AP samples with structural abnormalities of the RB gene, two showed the loss of the other allele. It is of note that alterations of both P53 and RB genes were observed in two AP samples. Our data strongly suggest that abnormalities of the P53 and RB genes and acceleration of CML are linked events in some cases of AP.
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MESH Headings
- Adult
- Aged
- Female
- Gene Expression Regulation, Neoplastic
- Genes, Retinoblastoma
- Genes, p53
- Humans
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Male
- Middle Aged
- Polymorphism, Single-Stranded Conformational
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Affiliation(s)
- Z Beck
- Institute of Microbiology, University Medical School, Debrecen, Hungary
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45
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Horváth E, Faragó M, Keszthelyi G, Keresztúri A, Szabó A, Szemere G, Szabó J. [Genetic counseling and prenatal care after medications during the first trimester]. Orv Hetil 2000; 141:1179-83. [PMID: 10853346] [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
Analysis of the outcome of 127 pregnancies with first trimester medication (8.4% of the total number of the patients seeking genetic advice in 1997 at the Institute of Medical Genetics in Szeged) was carried out. The gestational age at the time of the medication and genetic counselling, the indications of the treatment, the drugs, the estimated fetal risk, and results of genetic ultrasound examinations and pregnancy outcome were evaluated. The majority of pregnant woman (78%) asked for genetic counselling before the 12. gestational week. The main indications the treatment were: infections, psychiatric-neurologic (depression, anxiety, epilepsy), endocrine (diabetes, hyperthyreoidism), and cardiovascular diseases and gastrointestinal problems. The main groups of the drugs were: antibiotics, antipyretic-, antidepressive-, antidiabetic- and antihypertensive drugs. When the multiple medication was conducted by simultaneous administration of two or more drugs, a complex risk calculation was performed. The fetal risk was higher than 10% in 31 cases (24%). The ultrasound examinations performed by qualified sonographer contributed to a correct evaluation and to reliable follow-up of pregnancies. No suspicious ultrasound finding was reported in the first trimester. However, a severe fatal brain malformation was found in a second trimester pregnancy, which was terminated by the couple's request in the 18th gestational week. A complete follow-up was obtained in 70.9% (90) of the cases. Out of 64 pregnancies intended to continue to term 4 fetal malformations were found. Of them three malformations (patent ductus arteriosus, Robin sequence and a ventricular septal defect) were explored at birth or in the newborn period. The actual 6.3% of fetal malformations was higher compared to the rate expected at birth, but almost equal to the rate of congenital malformation found up to the end of the first year of age in Hungary.
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Affiliation(s)
- E Horváth
- Szegedi Tudományegyetem, Altalános Orvostudományi Kar, Szent-Györgyi Albert Orvos- és Gyógyszerésztudományi Centrum, Orvosi Genetikai Intézet
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Vágó P, Deák J, Bruncsics Z, Szabó J. [Regional epidemiologic examination of dental health status]. Fogorv Sz 2000; 93:53-9. [PMID: 10703177] [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] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
This study examined the oral status of the adult population in South-West Hungary using panoramic radiographs. The results indicate that in this population group 5.2% of the teeth were carious and 38.6% were missing, 3.87% were endodontically treated. Around the apices of the endodontically treated teeth in this survey in 40%, radiographic signs of periapical pathology were observed. Only 18% of the missing teeth had fixed prosthodontic restoration. The results are indicating a substantial future need for dental treatment.
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Affiliation(s)
- P Vágó
- Pécsi Orvostudományi Egyetem, Fogászati és Szájsebészeti Klinika
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Keszthelyi G, Keresztúri A, Gellén J, Faragó M, Szabó J. First trimester ultasonographic screening for chromosomal abnormalities. Int J Gynaecol Obstet 2000. [DOI: 10.1016/s0020-7292(00)83467-0] [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: 10/26/2022]
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48
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Szabó J, Beck Z, Csomán E, Liu X, Andrikó I, Kiss J, Bácsi A, Ebbesen P, Tóth FD. Differential patterns of interaction between HIV type 1 and HTLV type I in monocyte-derived macrophages cultured in vitro: implications for in vivo coinfection with HIV type 1 and HTLV type I. AIDS Res Hum Retroviruses 1999; 15:1653-66. [PMID: 10606088 DOI: 10.1089/088922299309694] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [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: 11/12/2022] Open
Abstract
The interaction between human immunodeficiency virus type 1 (HIV-1) and human T cell leukemia-lymphoma virus type I (HTLV-I) has generated substantial interest. However, there is disagreement on the in vivo consequences of the double infection. We investigated the interactions between HIV-1 and HTLV-I in monocyte-derived macrophages cultured in vitro. For study, the T cell-tropic strain IIIB and the macrophagetropic strain Ada-M of HIV-1 were used. The HTLV-I was prepared from the supernatants of the virus-producing MT-2 cell line. We found that coinfection of macrophages with T cell-tropic HIV-1 and HTLV-I significantly enhanced HIV-1 replication, whereas double infection of the cells with macrophage-tropic HIV-1 and HTLV-I resulted in marked upregulation of HTLV-I production. Stimulatory interactions between HIV-1 and HTLV-I were mediated by their trans-acting proteins. Results of study on nuclear translocation of proviral DNA showed that the tax gene product of HTLV-I was able to facilitate the nuclear import of the reverse-transcribed HIV-1(IIIB) DNA. In contrast, the HIV-1 Tat protein did not increase the intranuclear trafficking of HTLV-I DNA, which suggests another mechanism for HTLV-I enhancement by the tat gene product. In conclusion, this study provides possible mechanisms whereby coinfection of an individual with HIV-1 and HTLV-I may influence the clinical outcome of double infection.
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Affiliation(s)
- J Szabó
- Institute of Microbiology, University Medical School, Debrecen, Hungary
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Kárpáti I, Paragh G, Kovács E, Balogh Z, Szabolcs M, Szabó J, Kakuk G, Fóris G. Disturbed LDL and scavenger receptor functions in monocytes from chronic haemodialysed patients. Nephrol Dial Transplant 1999; 14:2664-8. [PMID: 10534509 DOI: 10.1093/ndt/14.11.2664] [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: 11/14/2022] Open
Abstract
BACKGROUND The most frequent complication in patients with end-stage renal failure on chronic haemodialysis (HD) treatment is atherosclerosis, i.e. the different forms of heart and vascular diseases. The complete disorder of serum lipid and lipoprotein patterns is well demonstrated, whereas our knowledge about the low-density lipoprotein (LDL) and scavenger receptor expression and function are poorly understood. METHODS In our current work, LDL and scavenger receptor expression and functions were simultaneously studied in monocytes obtained from 15 healthy male control subjects and from 11 chronic HD male patients applied with (125)I-labelled LDL, isolated from healthy volunteers. To study the scavenger LDL receptors, labelled acetylated LDL (acLDL) was used. RESULTS LDL binding to the monocytes of the HD-group was found to be decreased in comparison to that of the controls. As a result, the 50 microg LDL protein-induced inhibition of endogenous cholesterol synthesis was also diminished. In contrast, acLDL binding was greatly increased, though it could trigger only a low apoE synthesis. Consequently the number of cholesterol inclusions in monocytes was increased. CONCLUSIONS The disturbed expression and function of LDL and scavenger receptors both may play significant roles in pathogenesis of cardiovascular complications in chronic HD patients. Based on our present results, it can be assumed that dysfunction of scavenger receptors is at the centre of cardiovascular complications of HD patients with renal failure.
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Affiliation(s)
- I Kárpáti
- First Department of Medicine and Central Research Laboratory, University Medical School of Debrecen, Debrecen, Hungary
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50
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Bácsi A, Aranyosi J, Beck Z, Ebbesen P, Andirkó I, Szabó J, Lampé L, Kiss J, Gergely L, Tóth FD. Placental macrophage contact potentiates the complete replicative cycle of human cytomegalovirus in syncytiotrophoblast cells: role of interleukin-8 and transforming growth factor-beta1. J Interferon Cytokine Res 1999; 19:1153-60. [PMID: 10547155 DOI: 10.1089/107999099313091] [Citation(s) in RCA: 17] [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] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Although syncytiotrophoblast (ST) cells can be infected by human cytomegalovirus (HCMV), in vitro studies have indicated that ST cells do not support the complete viral reproductive cycle, or HCMV replication may occur in less than 3% of ST cells. The present study tested the possibility that placental macrophages might enhance activation of HCMV carried in ST cells and, further, that infected ST cells would be capable of transmitting virus to neighboring macrophages. For this purpose, we studied HCMV replication in ST cells grown alone or cocultured with uninfected placental macrophages. Our results demonstrated that HCMV gene expression in ST cells was markedly upregulated by coculture with macrophages, resulting in release of substantial amounts of infectious virus from HCMV-infected ST cells. After having become permissive for viral replication, ST cells delivered HCMV to the cocultured macrophages, as evidenced by detection of virus-specific antigens in these cells. The stimulatory effect of coculture on HCMV gene expression in ST cells was mediated by marked interleukin-8 (IL-8) and transforming growth factor-beta1 (TGF-beta1) release from macrophages, an effect caused by contact between the different placental cells. Our findings indicate an interactive role for the ST layer and placental macrophages in the dissemination of HCMV among placental tissue. Eventually, these interactions may contribute to the transmission of HCMV from mother to the fetus.
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Affiliation(s)
- A Bácsi
- Institute of Microbiology, University Medical School, Debrecen, Hungary
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