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Giménez E, Guerreiro M, Gozalbo-Rovira R, Aguilar C, Albert E, Piñana JL, Solano C, Navarro D. In vitro assessment of the combined effect of letermovir and sirolimus on cytomegalovirus replication. Rev Esp Quimioter 2023; 36:526-530. [PMID: 37365797 PMCID: PMC10586729 DOI: 10.37201/req/016.2023] [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] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 04/12/2023] [Accepted: 05/08/2023] [Indexed: 06/28/2023]
Abstract
OBJECTIVE Letermovir (LMV) is used for prophylaxis of cytomegalovirus (CMV) reactivation and end-organ disease in adult CMV-seropositive allogeneic hematopoietic stem cell transplant recipients (allo-HSCT). In turn, sirolimus (SLM) which displays in vitro anti-CMV activity, is frequently employed for prophylaxis of Graft vs. Host disease in allo-HSCT. Here, we aimed at assessing whether LMV and SLM used in combination may act synergistically in vitro on inhibiting CMV replication. METHODS The antiviral activity of LMV and SLM alone or in combination was evaluated by a checkerboard assay, using ARPE-19 cells infected with CMV strain BADrUL131-Y. LMV and SLM were used at concentrations ranging from 24 nM to 0.38 nM and 16 nM to 0.06 nM, respectively. RESULTS The mean EC50 for LMV and SLM was 2.44 nM (95% CI, 1.66-3.60) and 1.40 nM (95% CI, 0.41-4.74), respective. LMV and SLM interaction yielded mainly additive effects over the range of concentrations tested. CONCLUSIONS The additive nature of the combination of LMV and SLM against CMV may have relevant clinical implications in management of CMV infection in allo-HSCT recipients undergoing prophylaxis with LMV.
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Affiliation(s)
| | | | | | | | | | | | | | - D Navarro
- David Navarro, Microbiology Service, Hospital Clínico Universitario, and Department of Microbiology, School of Medicine, Av. Blasco Ibáñez 17, 46010 Valencia, Spain.
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2
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Albert E, Walsemann T, Behrends J, Jappe U. Lipid transfer protein syndrome in a Northern European patient: An unusual case report. Front Med (Lausanne) 2023; 10:1049477. [PMID: 36824608 PMCID: PMC9941155 DOI: 10.3389/fmed.2023.1049477] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 01/03/2023] [Indexed: 02/09/2023] Open
Abstract
Non-specific lipid transfer proteins (nsLTPs) as the primary sensitizer in plant-food allergic patients used to be seen primarily in the Mediterranean area. However, more recently, increasing numbers of clinically relevant sensitizations are being observed in Northern Europe. We herein report an unusual case of a woman who developed an anaphylactic reaction during a meal including a variety of different foods ranging from fruits and nuts to oats, wheat, and salmon. Allergy diagnostics showed no Bet v 1 sensitization but an nsLTP-mediated food allergy. Despite the much more prominent birch food syndrome in Central and Northern Europe, LTPs should be considered disease-causing agents, especially for patients developing severe reactions after consuming LTP-containing foods.
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Affiliation(s)
- E. Albert
- Division of Clinical and Molecular Allergology, Research Center Borstel, Leibniz Lung Center, Airway Research Center North (ARCN), Member of the German Center for Lung Research, Borstel, Germany
| | - T. Walsemann
- Division of Clinical and Molecular Allergology, Research Center Borstel, Leibniz Lung Center, Airway Research Center North (ARCN), Member of the German Center for Lung Research, Borstel, Germany
| | - J. Behrends
- Core Facility Fluorescence Cytometry, Research Center Borstel, Leibniz Lung Center, Borstel, Germany
| | - U. Jappe
- Division of Clinical and Molecular Allergology, Research Center Borstel, Leibniz Lung Center, Airway Research Center North (ARCN), Member of the German Center for Lung Research, Borstel, Germany,Interdisciplinary Allergy Outpatient Clinic, Medical Clinic III - Pneumology, University of Lübeck, Lübeck, Germany,*Correspondence: U. Jappe,
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Trepák K, Vajda K, Albert E, Horti I, Sikorszki L. [The effect of preoperative biliary stent on postoperative complications after the resection of pancreatic head tumour]. Magy Seb 2022; 75:1-7. [PMID: 35333755 DOI: 10.1556/1046.2021.10001] [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: 06/04/2021] [Accepted: 12/21/2021] [Indexed: 06/14/2023]
Abstract
Introduction. A preoperative biliary stent is often inserted because of obstructive jaundice due to pancreatic head tumour. However, it can also be the source of complications too. Aim and method. We retrospectively analyzed our operations which were performed between 01.10.2017 and 31.12.2019 for pancreatic tumour in association with stent related mortality and morbidity. The multiresistant bacteria and the spectrum of microorganism of intraoperative bile samples were investigated. Results. 82 patients were operated on with pancreatic tumour. There were 63 pancreatic head resections, and 19 palliative operations. 63 pancreatic head resections were analyzed. There were 36 open and 27 laparoscopic operations. Extended operation was needed in 12 cases (5 portal vein resections, 2 splenectomies, 1 right hepatolobectomy, 1 right hemicolectomy, 2 liver metastasectomies and 1 hepatic artery resection). The average age of 36 stented patients of which 24 were men and 12 women were 65 and 64 years respectively. The average age of 27 non-stented patients of which 14 were men and 13 were women, were 67.9 and 58 years respectively. The bile culture proved to be positive 30/36(83%) in the stented group and 13/27(48%) in the non-stented group (P = 0.005). The 3 most common bacteria were E coli, Enterococcus fecalis and Klebsiella pneumoniae in both groups followed by the yeast of Candida. 8 multiresistant bacteria were noticed in the stented group. 6 were ESBL producing (P = 0.033) and 2 vancomycine resistant (P = 0.5) bacteria. 3 patients of the stented group and 2 patients of the non-stented group were lost during the first 30 days. There were 4/0 wound infections, 6/2 haemorrhages, 2/2 pancreatic fistulas, and 2/3 abdominal abscesses in the stented vs. non stented groups. The average length of stay was 19.47 days in the stented and 14.62 days in the non-stented groups (P = 0.14). Conclusion. With regard to the fact that biliary stent changes the bacterial flora it is important to choose the proper antibiotic prophylaxis to reduce morbidity. On the basis of our own results and the literature an effective antibiotic therapy is suggested against enterococcus and ESBL producing bacteria. The prophylaxis against yeast in particularly in immunocompromised cases should also be considered. Regular antibiotic resistance check-up is essential.
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Affiliation(s)
- Kornélia Trepák
- Bács-Kiskun Megyei Oktatókórház, Általános Sebészeti Osztály, Kecskemét, Magyarország(osztályvezető: prof. dr. Sikorszki László)
| | - Kornél Vajda
- Bács-Kiskun Megyei Oktatókórház, Általános Sebészeti Osztály, Kecskemét, Magyarország(osztályvezető: prof. dr. Sikorszki László)
| | - Emőke Albert
- Bács-Kiskun Megyei Oktatókórház, Általános Sebészeti Osztály, Kecskemét, Magyarország(osztályvezető: prof. dr. Sikorszki László)
| | - Ildikó Horti
- Bács-Kiskun Megyei Oktatókórház, Általános Sebészeti Osztály, Kecskemét, Magyarország(osztályvezető: prof. dr. Sikorszki László)
| | - László Sikorszki
- Bács-Kiskun Megyei Oktatókórház, Általános Sebészeti Osztály, Kecskemét, Magyarország(osztályvezető: prof. dr. Sikorszki László)
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Tegze B, Albert E, Dikó B, Nagy N, Rácz A, Sáfrán G, Sulyok A, Hórvölgyi Z. Effect of Silver Modification on the Photoactivity of Titania Coatings with Different Pore Structures. Nanomaterials (Basel) 2021; 11:nano11092240. [PMID: 34578555 PMCID: PMC8466528 DOI: 10.3390/nano11092240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 08/25/2021] [Accepted: 08/26/2021] [Indexed: 01/12/2023]
Abstract
Nanostructured photoactive systems are promising for applications such as air and water purification, including self-cleaning coatings. In this study, mesoporous TiO2 sol-gel coatings with different pore structures were prepared and modified with silver by two methods: the "mixing" method by adding AgNO3 to the precursor sol, and the "impregnation" method by immersing the samples in AgNO3 solution (0.03 and 1 M) followed by heat treatment. Our aim was to investigate the effects that silver modification has on the functional properties (e.g., those that are important for self-cleaning coatings). Transmittance, band gap energy, refractive index, porosity and thickness values were determined from UV-Vis spectroscopy measurements. Silver content and structure of the silver modified samples were characterized by X-ray photoelectron spectroscopy, Rutherford backscattering spectrometry, High-resolution transmission electron microscopy and Energy Dispersive X-ray Spectrometry elemental mapping measurements. Wettability properties, including photoinduced wettability conversion behavior were investigated by water contact angle measurements. Photoactivity was studied under both UV and visible light with rhodamine 6G and methylene blue dye molecules, at the liquid-solid and air-solid interfaces modeling the operating conditions of self-cleaning coatings. Samples made with "impregnation" method showed better functional properties, in spite of their significantly lower silver content. The pore structure influenced the Ag content achieved by the "impregnation" method, and consequently affected their photoactivity.
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Affiliation(s)
- Borbála Tegze
- Centre for Colloid Chemistry, Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, Hungary; (B.T.); (E.A.); (B.D.)
| | - Emőke Albert
- Centre for Colloid Chemistry, Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, Hungary; (B.T.); (E.A.); (B.D.)
| | - Boglárka Dikó
- Centre for Colloid Chemistry, Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, Hungary; (B.T.); (E.A.); (B.D.)
| | - Norbert Nagy
- Centre for Energy Research, Institute of Technical Physics and Materials Science, H-1121 Budapest, Hungary; (N.N.); (A.R.); (G.S.); (A.S.)
| | - Adél Rácz
- Centre for Energy Research, Institute of Technical Physics and Materials Science, H-1121 Budapest, Hungary; (N.N.); (A.R.); (G.S.); (A.S.)
| | - György Sáfrán
- Centre for Energy Research, Institute of Technical Physics and Materials Science, H-1121 Budapest, Hungary; (N.N.); (A.R.); (G.S.); (A.S.)
| | - Attila Sulyok
- Centre for Energy Research, Institute of Technical Physics and Materials Science, H-1121 Budapest, Hungary; (N.N.); (A.R.); (G.S.); (A.S.)
| | - Zoltán Hórvölgyi
- Centre for Colloid Chemistry, Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, Hungary; (B.T.); (E.A.); (B.D.)
- Correspondence:
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Horváth B, Peles F, Szél A, Sipos R, Erős Á, Albert E, Micsinai A. Molecular typing of foodborne coagulase-positive Staphylococcus isolates identified by MALDI-TOF MS. Acta Alimentaria 2020. [DOI: 10.1556/066.2020.49.3.9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The aim of the study was the identification and characterisation of coagulase-positive Staphylococcus bacteria obtained from food matrices by mass spectrometry and molecular methods. A total of 46 coagulase-positive Staphylococcus isolates were collected from different foodstuffs. The Staphylococcus isolates were identified by MALDI-TOF MS and confirmed by the presence and sequence analysis of the Staphylococcus protein A gene. Staphylococcal enterotoxin genes were also investigated by multiplex PCR. Based on the identification of strains by the MALDI-TOF MS technique and spa-typing, all strains were identified as Staphylococcus aureus. Based on their MS peak profiles, the isolates matched the spectra of three S. aureus reference strains in the Bruker MALDI Biotyper database, with identification scores higher than 1.999 in the case of all 46 (100%) isolates. The isolates showed great genetic variability. Twenty spa types were identified, from which most lineages are capable of colonizing humans. Fifty percent of the strains harboured at least one of four enterotoxin genes (seg, seh, sei, and ser), but none of the classical enterotoxin genes could be detected.
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Affiliation(s)
- B. Horváth
- aInstitute of Food Science, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen Doctoral School of Animal Science, H-4032 Debrecen, Böszörményi út 138. Hungary
| | - F. Peles
- bInstitute of Food Science, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, H-4032 Debrecen, Böszörményi út 138. Hungary
| | - A. Szél
- cMikroMikoMed Ltd, H-1036 Budapest, Lajos utca 74-76. Hungary
| | - R. Sipos
- dBIOMI Ltd, H-2100 Gödöllő, Szent-Györgyi Albert utca 4. Hungary
| | - Á. Erős
- dBIOMI Ltd, H-2100 Gödöllő, Szent-Györgyi Albert utca 4. Hungary
| | - E. Albert
- fUniversity of Veterinary Medicine Budapest, H-2225, Üllő, Dóra major. Hungary
| | - A. Micsinai
- eWESSLING Hungary Ltd, H-1045 Budapest, Anonymus utca 6. Hungary
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Albert E, Noël C, Mathiaud C, Prochasson C, Raghu F, Lepvrier L, Peron P, Lucot C, Diamantis S, Vignier N. Efficacité d’une intervention de promotion et d’amélioration de l’accessibilité à la vaccination antigrippale pour les soignants d’un centre hospitalier général. Med Mal Infect 2020. [DOI: 10.1016/j.medmal.2020.06.388] [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: 11/15/2022]
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7
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Szőke ÁF, Szabó GS, Hórvölgyi Z, Albert E, Végh AG, Zimányi L, Muresan LM. Accumulation of 2-Acetylamino-5-mercapto-1,3,4-thiadiazole in chitosan coatings for improved anticorrosive effect on zinc. Int J Biol Macromol 2020; 142:423-431. [PMID: 31593734 DOI: 10.1016/j.ijbiomac.2019.09.114] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 06/18/2019] [Revised: 09/02/2019] [Accepted: 09/15/2019] [Indexed: 10/25/2022]
Abstract
Chitosan (Chit) coatings were applied on zinc substrates by the dip-coating method. Subsequently, the coatings were impregnated with a corrosion inhibitor, 2-Acetylamino-5-mercapto-1,3,4-thiadiazole (AcAMT) to obtain an increased anticorrosive effect. The coating thickness and the AcAMT accumulation were determined using UV-Vis spectroscopy on glass and quartz substrates, respectively. The surface morphology and coverage were investigated with atomic force microscopy. Electrochemical impedance spectroscopy and potentiodynamic polarization techniques were used to investigate the protective properties of the impregnated coatings. The chitosan coatings facilitated the accumulation of the corrosion inhibitor inside the polymeric matrix (a multiplication of 380 times compared to the impregnating solution concentration was calculated), channeling high amounts of AcAMT to the Zn surface, which resulted in an inhibition efficiency of >90%. This effect demonstrates the applicability of chitosan coatings as carriers for corrosion inhibitors, significantly reducing the amount of inhibitor needed to achieve good anticorrosive effects.
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Affiliation(s)
- Árpád Ferenc Szőke
- Babeş-Bolyai University, Faculty of Chemistry and Chemical Engineering, Research Center in Electrochemistry and Non-conventional Materials, 11 Arany János St., Cluj-Napoca RO-400028, Romania; Department of Chemical Engineering, Babeş-Bolyai University, 11 Arany János St., Cluj-Napoca RO-400028, Romania
| | - Gabriella Stefánia Szabó
- Babeş-Bolyai University, Faculty of Chemistry and Chemical Engineering, Research Center in Electrochemistry and Non-conventional Materials, 11 Arany János St., Cluj-Napoca RO-400028, Romania; Department of Chemistry and Chemical Engineering of the Hungarian Line, Babeş-Bolyai University, 11 Arany János St., Cluj-Napoca RO-400028, Romania
| | - Zoltán Hórvölgyi
- Budapest University of Technology and Economics, Faculty of Chemical Technology and Biotechnology, Department of Physical Chemistry and Materials Science, Centre for Colloid Chemistry, Budafoki út 6-8, Budapest HU-1111, Hungary
| | - Emőke Albert
- Budapest University of Technology and Economics, Faculty of Chemical Technology and Biotechnology, Department of Physical Chemistry and Materials Science, Centre for Colloid Chemistry, Budafoki út 6-8, Budapest HU-1111, Hungary
| | - Attila Gergely Végh
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári Krt. 62, Szeged H-6726, Hungary
| | - László Zimányi
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári Krt. 62, Szeged H-6726, Hungary
| | - Liana Maria Muresan
- Babeş-Bolyai University, Faculty of Chemistry and Chemical Engineering, Research Center in Electrochemistry and Non-conventional Materials, 11 Arany János St., Cluj-Napoca RO-400028, Romania; Department of Chemical Engineering, Babeş-Bolyai University, 11 Arany János St., Cluj-Napoca RO-400028, Romania.
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8
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Albert E, Tegze B, Hajnal Z, Zámbó D, Szekrényes DP, Deák A, Hórvölgyi Z, Nagy N. Robust Contact Angle Determination for Needle-in-Drop Type Measurements. ACS Omega 2019; 4:18465-18471. [PMID: 31720550 PMCID: PMC6844089 DOI: 10.1021/acsomega.9b02990] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 10/02/2019] [Indexed: 06/10/2023]
Abstract
One of the main approaches for contact angle determination using sessile drops with a missing apex (e.g., because of the presence of the needle tip) is the polynomial drop-profile fitting method. The major disadvantage of this fitting procedure is that the derived contact angle is highly sensitive to the polynomial order and the number of pixels involved in the actual fit. In the present work, an easily implementable method is introduced to effectively tackle these drawbacks. Instead of fitting the drop-profile itself, the polynomial fitting is applied to the difference between the drop profile and the circumcircle, independently for both sides of the drop. The derivative value of this difference at the contact point is used to correct the slope obtained analytically from the circumcircle. It is shown that this approach allows the robust determination of the contact angle with high (≤0.6°) accuracy in a straightforward manner, and the results are not affected by the actual contact angle, drop volume, or the resolution of the captured image. Validation of this new approach is also given in the contact angle range of 20°-150° by comparing the results to the values calculated by the Young-Laplace fit.
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Affiliation(s)
- Emőke Albert
- Department
of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, H-1521 Budapest, Hungary
| | - Borbála Tegze
- Department
of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, H-1521 Budapest, Hungary
| | - Zoltán Hajnal
- Institute
of Technical Physics and Materials Science, Centre for Energy Research, P.O. Box
49, H-1525 Budapest, Hungary
| | - Dániel Zámbó
- Institute
of Technical Physics and Materials Science, Centre for Energy Research, P.O. Box
49, H-1525 Budapest, Hungary
| | - Dániel P. Szekrényes
- Institute
of Technical Physics and Materials Science, Centre for Energy Research, P.O. Box
49, H-1525 Budapest, Hungary
| | - András Deák
- Institute
of Technical Physics and Materials Science, Centre for Energy Research, P.O. Box
49, H-1525 Budapest, Hungary
| | - Zoltán Hórvölgyi
- Department
of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, H-1521 Budapest, Hungary
| | - Norbert Nagy
- Institute
of Technical Physics and Materials Science, Centre for Energy Research, P.O. Box
49, H-1525 Budapest, Hungary
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Szőke ÁF, Szabó G, Simó Z, Hórvölgyi Z, Albert E, Végh AG, Zimányi L, Muresan LM. Chitosan coatings ionically cross-linked with ammonium paratungstate as anticorrosive coatings for zinc. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.05.057] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Szőke ÁF, Szabó GS, Hórvölgyi Z, Albert E, Gaina L, Muresan LM. Eco-friendly indigo carmine-loaded chitosan coatings for improved anti-corrosion protection of zinc substrates. Carbohydr Polym 2019; 215:63-72. [DOI: 10.1016/j.carbpol.2019.03.077] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 03/12/2019] [Accepted: 03/23/2019] [Indexed: 12/11/2022]
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Mellor N, Dufoix F, Saunder L, Albert E, Collange J. Le bien-être subjectif au travail et sa relation avec le soutien social perçu. ARCH MAL PROF ENVIRO 2018. [DOI: 10.1016/j.admp.2017.08.003] [Citation(s) in RCA: 4] [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: 01/07/2023]
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Kovács L, Kézér F, Albert E, Ruff F, Szenci O. Seasonal and maternal effects on acid-base, l-lactate, electrolyte, and hematological status of 205 dairy calves born to eutocic dams. J Dairy Sci 2017; 100:7534-7543. [DOI: 10.3168/jds.2017-12543] [Citation(s) in RCA: 5] [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] [Received: 01/01/2017] [Accepted: 05/12/2017] [Indexed: 11/19/2022]
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13
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Kócs L, Albert E, Tegze B, Kabai-Faix M, Major C, Szalai A, Basa P, Hórvölgyi Z. Silica Sol-gel Coatings with Improved Light Transmittance and Stability. Period Polytech Chem Eng 2017. [DOI: 10.3311/ppch.10550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Silica sol-gel coatings on different substrate materials and their use as model systems have been studied. Mesoporous silica coatings with thicknesses of 85 - 135 nm and porosity of 18 ˗ 37% were prepared by dip-coating on polycarbonate and glass substrates. In order to eliminate the shrinkage of the porous structure acid or base vapour treatment was applied. Thickness and refractive index of the coatings were determined by analysing the transmittance spectra of the samples. Ellipsometric porosimetry measurements were carried out to determine the porosity, pore radius distribution, thickness and refractive index. The thickness of the samples was further confirmed by scanning electron microscopy. The adsorption capacity of the porous coatings was also studied by dye impregnation tests. The temporal stability of the samples was investigated by UV-Vis spectrometry and it was found that the advantageous optical properties (Tmax = 98 – 99%) of the samples remained constant even after a 1 year storage period.
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Dabóczi M, Albert E, Agócs E, Kabai-Faix M, Hórvölgyi Z. Bilayered (silica–chitosan) coatings for studying dye release in aqueous media: The role of chitosan properties. Carbohydr Polym 2016; 136:137-45. [DOI: 10.1016/j.carbpol.2015.09.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 08/24/2015] [Accepted: 09/10/2015] [Indexed: 10/23/2022]
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Tanee F, Albert E. Reconnaissance Assessment of Long-Term Effects of Crude Oil Spill on Soil Chemical Properties and Plant Composition at Kwawa, Ogoni, Nigeria. ACTA ACUST UNITED AC 2015. [DOI: 10.3923/jest.2015.320.329] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Albert E, Basa P, Deák A, Németh A, Osváth Z, Sáfrán G, Zolnai Z, Hórvölgyi Z, Nagy N. Introducing nanoscaled surface morphology and percolation barrier network into mesoporous silica coatings. RSC Adv 2015. [DOI: 10.1039/c5ra09357k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The advantages of surface pattern and mesoporous character of silica thin films were combined, while preserving the interconnected pore system or creating laterally separated porous volumes surrounded by nonpermeable compact zones.
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Affiliation(s)
- E. Albert
- Budapest University of Technology and Economics
- Department of Physical Chemistry and Materials Science
- H-1521 Budapest
- Hungary
| | - P. Basa
- Semilab Semiconductor Physics Laboratory Co. Ltd
- H-1117 Budapest
- Hungary
| | - A. Deák
- Hungarian Academy of Sciences
- Centre for Energy Research
- Institute of Technical Physics and Materials Science
- H-1525 Budapest
- Hungary
| | - A. Németh
- Hungarian Academy of Sciences
- Wigner Research Centre for Physics
- Institute for Particle and Nuclear Physics
- H-1525 Budapest
- Hungary
| | - Z. Osváth
- Hungarian Academy of Sciences
- Centre for Energy Research
- Institute of Technical Physics and Materials Science
- H-1525 Budapest
- Hungary
| | - G. Sáfrán
- Hungarian Academy of Sciences
- Centre for Energy Research
- Institute of Technical Physics and Materials Science
- H-1525 Budapest
- Hungary
| | - Z. Zolnai
- Hungarian Academy of Sciences
- Centre for Energy Research
- Institute of Technical Physics and Materials Science
- H-1525 Budapest
- Hungary
| | - Z. Hórvölgyi
- Budapest University of Technology and Economics
- Department of Physical Chemistry and Materials Science
- H-1521 Budapest
- Hungary
| | - N. Nagy
- Hungarian Academy of Sciences
- Centre for Energy Research
- Institute of Technical Physics and Materials Science
- H-1525 Budapest
- Hungary
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Albert E, Albouy PA, Ayral A, Basa P, Csík G, Nagy N, Roualdès S, Rouessac V, Sáfrán G, Suhajda Á, Zolnai Z, Hórvölgyi Z. Antibacterial properties of Ag–TiO2 composite sol–gel coatings. RSC Adv 2015. [DOI: 10.1039/c5ra05990a] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This study reveals the connection between the silver-doping method, the resulting nature and amount of the silver dopant together with the structural properties and the long-term antibacterial activity of composite coatings.
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Kovács L, Tőzsér J, Kézér FL, Ruff F, Aubin-Wodala M, Albert E, Choukeir A, Szelényi Z, Szenci O. Heart rate and heart rate variability in multiparous dairy cows with unassisted calvings in the periparturient period. Physiol Behav 2014; 139:281-9. [PMID: 25449409 DOI: 10.1016/j.physbeh.2014.11.039] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [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: 05/31/2014] [Revised: 11/10/2014] [Accepted: 11/12/2014] [Indexed: 11/15/2022]
Abstract
Behavioural changes before calving can be monitored on farms; however, predicting the onset of calving is sometimes difficult based only on clinical signs. Heart rate (HR) and heart rate variability (HRV) as non-invasive measures of autonomic nervous system (ANS) activity were investigated in Holstein-Friesian cows (N=20) with unassisted calvings in the periparturient period to predict the onset of calving and assess the stress associated with calving. R-R-intervals were analysed in 5-min time windows during the following three main periods of measurement: 1) between 0 and 96 h before the onset of calving restlessness (prepartum period); 2) during four stages of calving: (I) early first stage; between the onset of calving restlessness and the first abdominal contractions; (II) late first stage (between the first abdominal contractions and the appearance of the amniotic sac); (III) early second stage (between the appearance of the amniotic sac and the appearance of the foetal hooves); (IV) late second stage (between the appearance of the foetal hooves and delivery of the calf), and 3) over 48 h following calving (postpartum period). Data collected between 72 and 96 h before calving restlessness was used as baseline. Besides HR, Poincaré measures [standard deviation 1 (SD1) and 2 (SD2) and SD2/SD1 ratio], the root mean square of successive differences (RMSSD) in R-R intervals, the high-frequency (HF) component of HRV and the ratio between the low-frequency (LF) and the HF components (LF/HF ratio) were calculated. Heart rate increased only following the onset of the behavioural signs, peaked before delivery of the calf, then decreased immediately after calving. Parasympathetic indices of HRV (RMSSD, HFnorm and SD1) decreased, whereas sympathovagal indices (LF/HF ratio and SD2/SD1 ratio) increased significantly from baseline between 12 and 24 before the onset of calving restlessness. The same pattern was observed between 0 and 1h before calving restlessness. Following the onset of behavioural signs, parasympathetic activity increased gradually with a parallel shift in sympathovagal balance towards parasympathetic tone, which was possibly a consequence of oxytocin release, which induces an increase in vagus nerve activity. Parasympathetic activity decreased rapidly between 0 and 0.5h following calving and was lower than measured during all other stages of the study, while sympathetic activity peaked during this stage and was higher than measured during any other stages. Between 0 and 4h after calving vagal tone was lower than baseline, whereas sympathovagal balance was higher, reflecting a prolonged physiological challenge caused by calving. Vagal activity decreased, whereas sympathovagal balance shifted towards sympathetic tone with increased live body weight of the calf during the late second stage of calving, suggesting higher levels of stress associated with the higher body weight of calves. All HRV indices, measured either at the late second stage of calving and between 12 and 24h after calving, were affected by the duration of calving. Our results indicate that ANS activity measured by HRV indices is a more immediate indicator of the onset of calving than behaviour or HR, as it changed earlier than when restlessness or elevation in HR could be observed. However, because of the possible effects of other physiological mechanisms (e.g. oxytocin release) on ANS activity it seems to be difficult to measure stress associated with calving by means of HRV between the onset of calving restlessness and delivery. Further research is needed to enable more precise interpretation of the prepartum changes in HR and HRV in dairy cattle.
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Affiliation(s)
- L Kovács
- Hungarian Academy of Sciences (HAS) - SZIE Large Animal Clinical Research Group, Üllő-Dóra Major H-2225, Hungary; Institute of Animal Science, Faculty of Agricultural and Environmental Sciences, Szent István University, Páter Károly utca 1, Gödöllő H-2100, Hungary.
| | - J Tőzsér
- Institute of Animal Science, Faculty of Agricultural and Environmental Sciences, Szent István University, Páter Károly utca 1, Gödöllő H-2100, Hungary
| | - F L Kézér
- Hungarian Academy of Sciences (HAS) - SZIE Large Animal Clinical Research Group, Üllő-Dóra Major H-2225, Hungary; Institute of Animal Science, Faculty of Agricultural and Environmental Sciences, Szent István University, Páter Károly utca 1, Gödöllő H-2100, Hungary
| | - F Ruff
- Institute of Economics, Law and Methodology, Faculty of Economics and Social Sciences, Szent István University, Páter Károly utca 1, Gödöllő H-2100, Hungary
| | - M Aubin-Wodala
- Hungarian Academy of Sciences (HAS) - SZIE Large Animal Clinical Research Group, Üllő-Dóra Major H-2225, Hungary
| | - E Albert
- Hungarian Academy of Sciences (HAS) - SZIE Large Animal Clinical Research Group, Üllő-Dóra Major H-2225, Hungary
| | - A Choukeir
- Hungarian Academy of Sciences (HAS) - SZIE Large Animal Clinical Research Group, Üllő-Dóra Major H-2225, Hungary
| | - Z Szelényi
- Hungarian Academy of Sciences (HAS) - SZIE Large Animal Clinical Research Group, Üllő-Dóra Major H-2225, Hungary; Department and Clinic of Food Animal Medicine, Faculty of Veterinary Science, Szent István University, Üllő-Dóra Major H-2225, Hungary
| | - O Szenci
- Hungarian Academy of Sciences (HAS) - SZIE Large Animal Clinical Research Group, Üllő-Dóra Major H-2225, Hungary; Department and Clinic of Food Animal Medicine, Faculty of Veterinary Science, Szent István University, Üllő-Dóra Major H-2225, Hungary
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Tanee F, Albert E. Heavy Metals Contamination of Roadside Soils and Plants Along Three Major Roads in Eleme, Rivers State of Nigeria. ACTA ACUST UNITED AC 2013. [DOI: 10.3923/jbs.2013.264.270] [Citation(s) in RCA: 4] [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: 11/15/2022]
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Albert E. Lehrbuch der Chirurgie und Operationslehre-, Vorlesungen für practische Aerzte und Studirende, mit zahlreichen Holzschnitten. Dtsch Med Wochenschr 2009. [DOI: 10.1055/s-0029-1193805] [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] [Indexed: 10/20/2022]
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Hildebrandt B, Graefe C, Scholz S, Albert E, Luderschmidt C. HLA-Allele sind diagnostische Parameter bei Sklerodermien. AKTUEL RHEUMATOL 2008. [DOI: 10.1055/s-2008-1043711] [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: 10/21/2022]
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Pancham S, Hemmaway C, New H, Albert E, Dokal I, Roberts IAG, McCloy M. Caspofungin for invasive fungal infections: combination treatment with liposomal amphotericin B in children undergoing hemopoietic stem cell transplantation. Pediatr Transplant 2005; 9:254-7. [PMID: 15787803 DOI: 10.1111/j.1399-3046.2005.00261.x] [Citation(s) in RCA: 12] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Invasive fungal infections often prove difficult to eradicate especially in the stem cell transplant setting. Amphotericin has been the mainstay of treatment for years but has significant toxicity. Newer antifungal agents, such as caspofungin, have shown promising results in adults, particularly when used in combination with amphotericin as both drugs differ in their mode of action. However, there are few data from children and no previous published information about the use of Caspofungin after paediatric stem cell transplantation. We report our experience in children with proven invasive fungal infections after stem cell transplantation. This combination was non-toxic, and two of three patients survived their infections.
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Affiliation(s)
- S Pancham
- Department of Paediatric Haematology, St Mary's Hospital, London, UK
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Füchtenbusch M, Vogel A, Achenbach P, Gummer M, Ziegler AG, Albert E, Standl E, Manns MP. Lupus-like panniculitis in a patient with autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy (APECED). Exp Clin Endocrinol Diabetes 2003; 111:288-93. [PMID: 12951636 DOI: 10.1055/s-2003-41287] [Citation(s) in RCA: 10] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy (APECED) is a rare autosomal recessive disorder, characterised by a loss of self-tolerance to endocrine tissues, chronic candidiasis and ectodermal disorders. APECED is associated with mutations of a single gene, designated autoimmune regulator (AIRE). We describe a 31-year-old APECED patient with non-traumatic, cutaneous ulcers on both forearms with features of a lupus-like panniculitis. On admission to the ICU in September 2001, the patient suffered from a ketoacidotic, hyperglycemic coma and adrenal crisis due to an Enterobacter-cloacae sepsis, originating from multiple, necrotising deep cutaneous ulcers. These ulcers spontaneously developed on both forearms, some of which were just emerging, full blown or healing with scars. Histological examination showed signs of a scarring panniculitis and vasculitis. Immunohistochemistry and direct immunofluorescence with characterisation of immunoglobulin and complement-factor binding pattern revealed features of a lupus-like panniculitis. Sequence analysis of all 14 exons of the AIRE gene revealed a R257 X mutation in exon 6 resulting in a nonsense mutation at codon 257 confirming the diagnosis of APECED. Oral treatment with 60 mg/day corticosteroids for two weeks led to complete resolution of all ulcers. In conclusion, mutations in the AIRE gene may provide the genetic background against which additional factors can initiate an autoimmune process. Here, autoimmune panniculitis appears to be an associated feature of the APECED syndrome. Our findings support the use of immunosuppressive therapy for autoimmune disease components of the APECED syndrome.
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Affiliation(s)
- M Füchtenbusch
- Department of Endocrinology, Diabetology and Gastroenterology, Academic Hospital München-Schwabing, Munich, Germany.
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Walter M, Albert E, Conrad M, Keller E, Hummel M, Ferber K, Barratt BJ, Todd JA, Ziegler AG, Bonifacio E. IDDM2/insulin VNTR modifies risk conferred by IDDM1/HLA for development of Type 1 diabetes and associated autoimmunity. Diabetologia 2003; 46:712-20. [PMID: 12750767 DOI: 10.1007/s00125-003-1082-z] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.6] [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] [Received: 10/02/2002] [Revised: 12/17/2002] [Indexed: 01/16/2023]
Abstract
AIM/HYPOTHESIS Type 1 diabetes (T1D) is an autoimmune disease with multiple susceptibility genes. The aim of this study was to determine whether combining IDDM1/HLA and IDDM2/ insulin( INS) 5' variable number of tandem repeat locus (VNTR) genotypes improves T1D risk assessment. METHODS Patients with T1D (n=488), control subjects (n=846), and offspring of parents with T1D (n=1122) were IDDM1 and IDDM2 genotyped. Offspring were followed for islet autoantibodies and T1D from birth until the age of 2 to 12 years. RESULTS Compared to the I/I INS VNTR genotype, the I/III and III/III genotypes reduced T1D risk conferred by IDDM1/HLA in all HLA genotype categories of the case-control cohort by 1.6-fold to three-fold. The highest T1D risk was associated with INS VNTR class I/I plus HLA DR3/DR4-DQ8 (20.4% in patients, 0.6% in control subjects) or HLA DR4-DQ8/DR4-DQ8 (6.3% in patients, 0.2% in control subjects). In the offspring, HLA DR3/DR4-DQ8 and DR4-DQ8/DR4-DQ8 conferred increased risk for early development of islet autoantibodies (14.6% and 12.9% by age 2 years). Offspring with these high risk IDDM1 genotypes plus the INS VNTR class I/I genotype (n=71; 6.3%) had the highest risk of developing islet autoantibodies (21.8% by age 2 years vs 8.9% in offspring with high risk IDDM1 plus INS VNTR class I/III or III/III genotypes, p<0.05) and T1D (8.5% by age 6 years vs 4.3%). Offspring who developed autoantibodies to multiple antigens had increased frequencies of both high risk IDDM1 and IDDM2 genotypes (p<0.0001), whereas offspring who developed autoantibodies to GAD only had increased frequencies of high risk IDDM1 and protective IDDM2 genotypes, suggesting that IDDM2 influences the autoimmune target specificity. CONCLUSION/INTERPRETATION Combining IDDM1 and IDDM2 genotyping identifies a minority of children with an increased T1D risk.
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Affiliation(s)
- M Walter
- Diabetes Research Institute, Munich-Schwabing Hospital, Kölner Platz 1, 80804 Munich, Germany
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Tiercy JM, Marsh SGE, Schreuder GMT, Albert E, Fischer G, Wassmuth R. Guidelines for nomenclature usage in HLA reports: ambiguities and conversion to serotypes. Eur J Immunogenet 2002; 29:273-4. [PMID: 12047366 DOI: 10.1046/j.1365-2370.2002.00336.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- J-M Tiercy
- Transplantation Immunology Unit, University Hospital, Geneva, Switzerland.
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Ottinger HD, Müller CR, Goldmann SF, Albert E, Arnold R, Beelen DW, Blasczyk R, Bunjes D, Casper J, Ebell W, Ehninger G, Eiermann T, Einsele H, Fauser A, Ferencik S, Finke J, Hertenstein B, Heyll A, Klingebiel T, Knipper A, Kremens B, Kolb HJ, Kolbe K, Lenartz E, Lindemann M, Müller CA, Mytilineos J, Niederwieser D, Runde V, Sayer H, Schaefer UW, Schmitz N, Schröder S, Schulze-Rath R, Schwerdtfeger R, Siegert W, Thiele B, Zander AR, Grosse-Wilde H. Second German consensus on immunogenetic donor search for allotransplantation of hematopoietic stem cells. Ann Hematol 2001; 80:706-14. [PMID: 11797110 DOI: 10.1007/s00277-001-0384-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [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: 03/01/2001] [Accepted: 09/09/2001] [Indexed: 11/24/2022]
Abstract
The present paper summarizes the results of the second German consensus meeting on immunogenetic donor search for allotransplantation of hematopoietic stem cells held in Essen in November 1999 under the auspices of the German Society for Immunogenetics (DGI) and the German Working Party for Blood and Marrow Transplantation (DAG-KBT). Immunogeneticists and transplant physicians from all over the country agreed to update the national standards for: (1) search strategy including the role of unrelated and extended family donor search after unsuccessful core family donor search, (2) histocompatibility loci to be typed, (3) histocompatibility typing techniques to be used (HLA serology vs DNA-based HLA typing, cellular tests, serum cross-match), and (4) acceptable HLA mismatches in the context of a defined underlying disease, donor type, and conditioning regimen.
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Affiliation(s)
- H D Ottinger
- Institut für Immunologie, Universitätsklinikum Essen, Virchowstr. 171, 45147 Essen, Germany
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Braun C, Zahn R, Martin K, Albert E, Folwaczny C. Polymorphisms of the ICAM-1 gene are associated with inflammatory bowel disease, regardless of the p-ANCA status. Clin Immunol 2001; 101:357-60. [PMID: 11726228 DOI: 10.1006/clim.2001.5118] [Citation(s) in RCA: 47] [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] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The intercellular adhesion molecule-1 (ICAM-1) is of paramount importance for the initiation and propagation of various inflammatory conditions. An increased frequency of allele R241 of the ICAM-1 gene was previously described in p-ANCA-negative as compared to p-ANCA-positive ulcerative colitis and vice versa in Crohn's disease. One hundred sixteen healthy unrelated controls, 121 patients with ulcerative colitis, and 96 patients with Crohn's disease were genotyped for two polymorphisms of the ICAM-1 gene (R/G241, exon 4; and K/E469, exon 6), employing dot-blot hybridization and stratified according to their p-ANCA status. When compared with the control group the frequency of the allele R241 (P = 0.024) and the heterozygous genotype R/G241, P = 0.032) were significantly increased in ulcerative colitis, whereas the homozygous genotype G/G241 was found less frequently (P = 0.022). The heterozygous genotype K/E469 was observed less frequently (P = 0.001 and 0.037, resp.) than the homozygous genotype E/E469, which was more frequent in Crohn's disease and ulcerative colitis (P = 0.002 and 0.012, respectively). Further significant differences concerning the allele or genotype distribution were not observed. After stratification for the p-ANCA status significant differences concerning the frequencies of both the R241 and the E469 alleles were not detected when p-ANCA-positive inflammatory bowel disease and p-ANCA-negative inflammatory bowel disease were compared. Ulcerative colitis and Crohn's disease are associated with polymorphisms of the ICAM-1 gene, which might therefore represent a functional candidate gene. However, the observed associations are independent of the p-ANCA status.
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Affiliation(s)
- C Braun
- Medizinische Klinik Innenstadt, Ludwig-Maximiliams Universität, Munich, Germany
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Albert E. GPs and organisational research. Aust Fam Physician 2001; 30:930. [PMID: 11706597] [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: 02/22/2023]
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Lesuisse D, Deprez P, Albert E, Duc TT, Sortais B, Gofflo D, Jean-Baptiste V, Marquette J, Schoot B, Sarubbi E, Lange G, Broto P, Mandine E. Discovery of thioazepinone ligands for Src SH2: from non-specific to specific binding. Bioorg Med Chem Lett 2001; 11:2127-31. [PMID: 11514153 DOI: 10.1016/s0960-894x(01)00386-9] [Citation(s) in RCA: 15] [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: 11/20/2022]
Abstract
The structure-based design and synthesis of new thioazepinones as ligands for Src SH2 protein is presented. From benzothioazepinones, ligands with somewhat unspecific binding properties, simpler thioazepinones were designed, the best ones demonstrated nanomolar affinity for Src SH2. A few of these new ligands were crystallized with the protein and demonstrated a specific binding mode with the protein.
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Affiliation(s)
- D Lesuisse
- Department of Medicinal Chemistry, Aventis, 102 route de Noisy, 93235 Romainville Cedex, France.
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Lesuisse D, Gourvest JF, Albert E, Doucet B, Hartmann C, Lefrançois JM, Tessier S, Tric B, Teutsch G. Biphenyls as surrogates of the steroidal backbone. Part 2: discovery of a novel family of non-steroidal 5-alpha-reductase inhibitors. Bioorg Med Chem Lett 2001; 11:1713-6. [PMID: 11425544 DOI: 10.1016/s0960-894x(01)00268-2] [Citation(s) in RCA: 6] [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: 11/27/2022]
Abstract
A new family of non-steroidal 5-alpha-reductase inhibitors was designed by replacing the steroid skeleton of an inhibitor related to estrone by a biphenyl moiety. This hypothesis originated from the reported estrogenic activity of a few biphenyl compounds (see Part 1 of this paper; Lesuisse et al. Bioorg. Med. Chem. Lett. 2001, 11, 1709). Two compounds turned out to be potent type 2 5-alpha-reductase inhibitors with IC(50)'s of inhibition in the nanomolar range. These are to our knowledge amongst the most potent non-steroidal 5-alpha-reductase inhibitors described to date.
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Affiliation(s)
- D Lesuisse
- Medicinal Chemistry, Aventis, 102 route de Noisy, 93235 Cedex, Romainville, France.
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Lesuisse D, Albert E, Bouchoux F, Cérède E, Lefrançois JM, Levif MO, Tessier S, Tric B, Teutsch G. Biphenyls as surrogates of the steroidal backbone. Part 1: synthesis and estrogen receptor affinity of an original series of polysubstituted biphenyls. Bioorg Med Chem Lett 2001; 11:1709-12. [PMID: 11425543 DOI: 10.1016/s0960-894x(01)00267-0] [Citation(s) in RCA: 9] [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] [Indexed: 11/20/2022]
Abstract
In the course of a programme aimed at discovering new ligands of the estrogen receptor, we explored a series of substituted biphenyls. Their synthesis and binding affinity are described.
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Affiliation(s)
- D Lesuisse
- Medicinal Chemistry, Aventis, 102 route de Noisy, 93235 Cedex, Romainville, France.
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Lederer SR, Kluth-Pepper B, Schneeberger H, Albert E, Land W, Feucht HE. Impact of humoral alloreactivity early after transplantation on the long-term survival of renal allografts. Kidney Int 2001; 59:334-41. [PMID: 11135088 DOI: 10.1046/j.1523-1755.2001.00495.x] [Citation(s) in RCA: 138] [Impact Index Per Article: 6.0] [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]
Abstract
BACKGROUND The contribution of humoral alloreactivity to the rejection of renal allografts is not well defined because humoral antigraft reactions are not easily detectable in transplant biopsies, and serial measurements of circulating allo-antibodies in the post-transplantation period are not routinely performed. We have developed diagnostic techniques that improve the assessment of humoral alloreactivity in vivo and in vitro. METHODS Humoral alloreactivity in transplant biopsies derived from 218 single kidney grafts was detected by assessing the deposition of complement fragment C4d in interstitial capillaries. Circulating alloantibodies were determined in corresponding serum samples by flow cytometry using lymphoblastoid cell lines of donor DR-type as target cells and by a conventional microcytotoxicity test. The impact of capillary C4d and other selected variables on renal graft survival was calculated by univariate and multivariate analysis. RESULTS Capillary C4d, present in 46% of biopsies from first grafts and 72% of regrafts, is related to circulating alloantibodies. Grafts with capillary C4d have a markedly shorter survival than grafts without capillary C4d (50% graft survival, 4 vs. 8 years, P = 0.0001). Among several risk factors, capillary C4d is the strongest predictor of subsequent graft loss in a multivariate analysis (relative risk, 2.1, 95% CI, 1.4 to 3.1). Humoral alloreactivity detectable within six months after transplantation has a much stronger impact on graft survival than alloreactivity detected beyond this period. CONCLUSIONS Humoral alloreactivity, manifested by the capillary deposition of complement C4d in about 50% of biopsied renal grafts, exerts a strong impact on graft survival when it operates within six months after transplantation.
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Affiliation(s)
- S R Lederer
- Medizinische Klinik Innenstadt, Institut für Immunologie, Kinderpoliklinik, and Abteilung für Transplantationschirurgie, Klinikum der Universität München, Munich, Germany
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Albert E. The difference a few minutes can make. Aust Fam Physician 2000; 29:1120. [PMID: 11140210] [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: 02/18/2023]
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Ihle J, Kümmerle-Deschner J, Orlikowsky T, Albert E, Niethammer D, Dannecker GE. Factor V Leiden and venous thrombosis in a 4-yr-old girl with Behçet's syndrome. Rheumatology (Oxford) 2000; 39:209-10. [PMID: 10725075 DOI: 10.1093/rheumatology/39.2.209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Helmberg W, Zahn R, Keller E, Weinmair B, Lanzer G, Albert E. Virtual DNA analysis as a platform for interlaboratory data exchange of HLA DNA typing results. Tissue Antigens 1999; 54:379-85. [PMID: 10551421 DOI: 10.1034/j.1399-0039.1999.540407.x] [Citation(s) in RCA: 13] [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] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In 1998, the German DNA Exchange offered the possibility to report typing data as virtual DNA. Participating labs have been equipped with software based on the principle of Virtual DNA Analysis (VDA). This approach allows the combination of sequence-specific oligonucleotide (SSO), sequence-specific primer (SSP) and sequence-based typing (SBT) results. The use of all types of test kits has been allowed without any limitations, as long as basic sequence information on SSOs or SSPs was available, at least the sequence and the position of the detected motif on the sample DNA. Typing raw data of the actual SSO-SSP and, if performed, SBT information was collected. Participating labs received 20 DNA samples to type. Fourteen labs returned data on 1,250 single-locus testings. Reported data consisted of 317 SBT data, 452 SSO kits and 1,795 SSP kits with 43,312 single SSO/ SSP reactivities. One hundred and twenty-six different typing kits (unique laboratory-specific kits, commercial kits from 7 companies) have been used. In 30 (2.4%) single-locus testings, at least one single SSO/SSP reactivity has been false-positive or -negative, thus not leading to a valid result on primary evaluation. Eight of these 30 cases were due to the presence of a new DRB1*14 allele in sample no. 2. Thirty-five tests (2.8%) showed wrong allele assignments. This first attempt to collect raw typing data instead of typing interpretation on a larger scale shows the advantages of Virtual DNA Analysis like interlaboratory data exchange without loss of information, transparency of typing interpretation and reinterpretation of typing data with an updated allele database. The VDA format is a useful tool for workshops and bone marrow donor registries.
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Affiliation(s)
- W Helmberg
- Transfusionmedicine, Universitätklinik Graz, Austria.
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Gencik M, Borgmann S, Zahn R, Albert E, Sitter T, Epplen JT, Fricke H. Immunogenetic risk factors for anti-neutrophil cytoplasmic antibody (ANCA)-associated systemic vasculitis. Clin Exp Immunol 1999; 117:412-7. [PMID: 10444278 PMCID: PMC1905323 DOI: 10.1046/j.1365-2249.1999.00969.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.9] [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] [Indexed: 11/20/2022] Open
Abstract
Wegener's granulomatosis (WG) and microscopic polyangiitis are systemic autoimmune diseases characterized by the presence of ANCA in the sera of patients. Little is known about the aetiologic factors and genetic predisposition as well as the pathogenesis of these disease entities. A slightly decreased representation of HLA-DRB1*13 and HLA-DQB1*0603 individuals was observed in our cohort of ANCA-associated systemic vasculitis (AASV) patients compared with controls. In addition, HLA-DRB1*04 individuals were over-represented in a subgroup of patients with WG in end-stage renal disease as a result of renal vasculitis. In order to identify other genes relevant for these diseases, we investigated highly polymorphic markers in the vicinity of several immunorelevant genes, i.e. tumour necrosis factor (TNF)alpha, IL-2, IL-5 receptor alpha (IL-5RA), in a group of 102 patients with AASV and compared the representation with controls. Furthermore, functional polymorphisms were directly analysed in the promotor region of TNFalpha as well as in the coding region of the FcgammaIIRA genes. Polymorphisms of the TNFalpha promotor (TNF-308) as well as in the FcgammaIIRA gene were excluded as risk factors for the disease in our cohort. No major phenotype distribution differences were observed between patients and controls for the IL-2 and IL-5RA microsatellites. Most importantly, several haplotypes on chromosome 6p appeared strongly associated with proteinase 3 (PR3)-ANCA+ AASV. Thus, as in other autoimmune diseases, different predisposing factors play differential aetiopathogenic roles in various groups of AASV patients.
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Affiliation(s)
- M Gencik
- Molekulare Humangenetik, Ruhr-Universität Bochum, Germany
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Folwaczny C, Zahn R, Brünnler G, Albert E, Koenig A, Noehl N, Loeschke K, Fricke H. Lack of association between HLA-DRB1 alleles of the major histocompatibility complex and p-ANCA status or clinical characteristics in patients with ulcerative colitis. Z Gastroenterol 1999; 37:133-40. [PMID: 10190246] [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: 02/11/2023]
Abstract
INTRODUCTION An association between different HLA-subtypes and ulcerative colitis has been described in various study populations of different ethnic and geographic background. Moreover, a correlation between HLA-DR2 and ulcerative colitis, in particular p-ANCA-positive ulcerative colitis, was reported. Thus, the present study aimed on the correlation of HLA-DRB1* alleles with the presence of p-ANCA and clinical characteristics in individuals of southern german descent. PATIENTS AND METHODS The study population comprised 56 patients with ulcerative colitis and 177 healthy controls. HLA-DRB1* alleles were assessed by use of the dot blot method. Autoanti-bodies were visualized by indirect immunofluorescence on ethanol-fixed neutrophils. RESULTS The allele HLA-DRB1*12 was more frequent in patients with ulcerative colitis (p = 0.01). After correction for the number of alleles tested (n = 16) statistical significance was no longer preserved. A weak association between the presence of HLA-DR5 and the detection of p-ANCA in ulcerative colitis was found (p = 0.0375). After correction for the number of comparisons (n = 10) no associations between HLA-DR antigens and the presence of p-ANCA remained. Furthermore, no significant correlations between clinical characteristics of ulcerative colitis and HLA-DR antigens were detected. DISCUSSION Genes encoding for HLA-DR antigens are unlikely to have an impact on the heredity and the presence of disease phenotypes of ulcerative colitis in a study population of southern german descent.
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Affiliation(s)
- C Folwaczny
- Medizinische Klinik, Klinikum Innenstadt, Ludwig-Maximilians-Universität, München
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Affiliation(s)
- B Kluth-Pepper
- Institut für Immunologie, Klinikum Innenstadt, Munchen, Germany
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Helmberg W, Lanzer G, Zahn R, Weinmayr B, Wagner T, Albert E. Virtual DNA analysis--a new tool for combination and standardised evaluation of SSO, SSP and sequencing-based typing results. Tissue Antigens 1998; 51:587-92. [PMID: 9694350 DOI: 10.1111/j.1399-0039.1998.tb03000.x] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
In order to obtain reliable information on HLA types, DNA typing with sequence-specific oligonucleotide/primer (SSO/SSP) typing sets or sequencing-based typing (SBT) is increasingly performed. The quality of the evaluation depends on the presence of a complete listing of all typed alleles as well as on the ability of detecting all corresponding alleles/allele pairs. We have developed the concept of virtual DNA analysis (VDA), which is able to combine all types of SSO/SSP/SBT results and evaluate this typing in combination according to the latest published allele sequence lists. The concept is based on the target DNA recognised by the respective typing techniques. All SSO/SSP or SBT results are transformed to a virtual sample DNA, which subsequently is analysed. Evaluation of generic or allele-specific DNA typing or the combination of both is supported. Due to this flexible approach, all kinds of SSO/SSP sets, as far as the respective SSO/SSP sequences are available, can be entered and evaluated immediately. The combination of collected data of different typing sets and procedures leads to the highest possible typing resolution. If more than one possible allele combination persists, the program reduces the result to the most specific common denominator in a stepwise manner. VDA offers the possibility of re-evaluation of former SSO/SSP/SBT results, alone or in combination. No solutions are omitted. This might be a first step towards standardisation of evaluating DNA-based HLA typing results or transfer of the respective typing data for later evaluation.
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Affiliation(s)
- W Helmberg
- Department für Transfusionmedizin und Immunhämatologie, Universitätsklinik, Graz, Austria.
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Albert E. Considerations and treatments to erupt impacted teeth. J Gen Orthod 1998; 9:13-27. [PMID: 10535029] [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: 02/14/2023]
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Hacker UT, Bidlingmaier C, Gomolka M, Keller E, Eigler A, Hartmann G, Folwaczny C, Fricke H, Albert E, Loeschke K, Endres S. Inflammatory bowel disease: no association between allele combinations of the interleukin (IL) I beta and IL-I receptor antagonist gene polymorphisms. Eur J Clin Invest 1998; 28:214-9. [PMID: 9568467 DOI: 10.1046/j.1365-2362.1998.00277.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [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: 02/07/2023]
Abstract
BACKGROUND Interleukin 1 (IL-1) and its physiological antagonist interleukin-1 receptor antagonist (IL-1 ra) play a crucial role in the pathogenesis of inflammatory bowel disease. Polymorphisms in the genes coding for these cytokines, the restriction enzyme TaqI polymorphism for IL-1 beta and the variable number of tandem repeats (VNTR) polymorphism for IL-1 ra, have been shown to influence cytokine synthesis in vitro. Recently, an association has been described for distinct allele combinations of these two polymorphisms in patients with ulcerative colitis and with Crohn's disease but not in healthy control subjects. METHODS We studied 56 patients with ulcerative colitis, 64 patients with Crohn's disease and 196 healthy control subjects. All were unrelated Caucasians of European ancestry. After polymerase chain reaction (PCR) the amplification products were analysed on agarose gels. For the IL-1 beta polymorphism the PCR product was additionally digested using the restriction enzyme TaqI. RESULTS The allele and genotype frequencies as well as the carriage rates of the IL-1 beta TaqI polymorphism in healthy control subjects were in agreement with previous findings in other populations. Allele and genotype frequencies of the IL-1 beta polymorphism were not different in inflammatory bowel disease patients compared with healthy control subjects. Comparing allele combinations of both polymorphisms no association could be identified either within healthy control subjects or in the groups of patients with ulcerative colitis or Crohn's disease. CONCLUSION Thus, we could not confirm the results of a previous study reporting an association between the IL-1ra and IL-1 beta gene polymorphisms in patients with inflammatory bowel disease.
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Affiliation(s)
- U T Hacker
- Medizinische Klinik, Klinikum Innenstadt, University of Munich, Germany
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Albert E, Alpuente M, Falaschi M, Julián P, Vidal G. Improving Control in Functional Logic Program Specialization. Static Analysis 1998. [DOI: 10.1007/3-540-49727-7_16] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Ottinger HD, Albert E, Arnold R, Beelen DW, Blasczyk R, Bunjes D, Burdach S, Ebell W, Ehninger G, Einsele H, Enczmann J, Fauser A, Friedrich W, Finke J, Göbel U, Goldmann SF, Gramatzki M, Helbig W, Kanz L, Klingebiel T, Kolb HJ, Kühnl P, Löliger C, Müller CR, Grosse-Wilde H. German consensus on immunogenetic donor search for transplantation of allogeneic bone marrow and peripheral blood stem cells. Bone Marrow Transplant 1997; 20:101-5. [PMID: 9244411 DOI: 10.1038/sj.bmt.1700851] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In Germany allotransplantation of bone marrow or peripheral blood stem cells is presently performed by 34 different teams operating more or less independently. Thus, strategies of immunogenetic donor search, use of the various tissue typing techniques and policy on acceptable HLA mismatches in related and unrelated settings may vary considerably from one transplant centre to another. This paper summarises the results of the first German consensus meeting on immunogenetic donor search for bone marrow/peripheral blood stem cell grafting. The main goal of the participating transplant physicians and immunogeneticists was to define national standards for the above issues.
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Frankenberger B, Breitkopf S, Albert E, Scholz S, Keller E, Schattenkirchner M, Weiss EH, Kellner H. Routine molecular genotyping of HLA-B27 in spondyloarthropathies overcomes the obstacles of serological typing and reveals an increased B *2702 frequency in ankylosing spondylitis. J Rheumatol 1997; 24:899-903. [PMID: 9150078] [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: 02/04/2023]
Abstract
OBJECTIVE To evaluate the reproducibility and reliability of polymerase chain reaction (PCR) in HLA-B27 typing compared to the conventionally used microlymphocytotoxicity test (MLCT). To determine the HLA-B27 subtype frequencies (B*2701-B*2709) in patients with HLA-B27 associated disease and healthy persons using sequence specific oligonucleotides (SSO). METHODS 398 consecutive patients were HLA-B27 typed by MLCT and PCR. Subtyping by SSO was performed in 142 patients with HLA-B27 associated disease [ankylosing spondylitis (AS) n = 38, reactive arthritis 44, undifferentiated spondyloarthropathy (uSpA) 45, psoriatic arthritis 15] and 125 healthy HLA-B27 controls. RESULTS MLCT identified 61 HLA-B27 positive patients (15.3%); PCR identified 78 positive patients (19.6%). MLCT gave false negative results for 8 patients (2.0%) and false positives for a further 7 (1.8%). Only subtypes B*2702 and B*2705 were present in patients and controls. Overall frequencies of B*2702 in patients and controls were 14.1 and 9.6%, respectively. The B*2702 frequency was significantly (pcorr. < 0.04) higher in AS (23.7%) and lower in uSpA (6.7%) patients. CONCLUSION HLA-B27 typing by PCR is reliable and reproducible and therefore recommended for routine typing. It overcomes the obstacles of serological typing, i.e., equivocal results and cross-reactivity. In addition, subtype frequencies (B*2702 and B*2705) are equally distributed among patients and controls, although subtype B*2702 seems to be more frequent in AS and less so in uSpA.
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Affiliation(s)
- B Frankenberger
- Rheumaeinheit, Medizinische Poliklinik, Klinikum Innenstadt, Germany
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Hacker UT, Gomolka M, Keller E, Eigler A, Folwaczny C, Fricke H, Albert E, Loeschke K, Endres S. Lack of association between an interleukin-1 receptor antagonist gene polymorphism and ulcerative colitis. Gut 1997; 40:623-7. [PMID: 9203941 PMCID: PMC1027165 DOI: 10.1136/gut.40.5.623] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [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: 02/04/2023]
Abstract
BACKGROUND Recently, the association of a polymorphism in the gene coding for the anti-inflammatory cytokine interleukin-1 receptor antagonist with ulcerative colitis has been reported. This was interpreted as a possible genetic predisposition for severity of the inflammatory response. AIMS To examine this polymorphism in a southern German population. SUBJECTS The study included 234 healthy controls, 57 patients with ulcerative colitis, including 31 patients with pancolitis, 44 first degree healthy relatives of patients with ulcerative colitis, and 65 patients with Crohn's disease. METHODS Genotypes were determined by a polymerase chain reaction amplification of the intron 2 fragment harbouring a variable number of tandem repeat nucleotide sequences. Amplification products were separated on a 2% agarose gel. RESULTS The allele frequency for allele 2 was 27% in healthy controls, 28% in Crohn's disease, and 21% in patients with ulcerative colitis. The same allele frequency (21%) was found in a subgroup of patients with ulcerative colitis affecting the whole colon. Thus for allele 2 as well as for all other alleles, genotypes, or carriage rates no significant differences were found compared with controls. All allele frequencies in the control population were similar to those in earlier studies. CONCLUSIONS No association of a polymorphism in the interleukin-1 receptor antagonist gene with ulcerative colitis could be identified in this southern German population. The findings of an earlier study reporting an increased frequency of allele 2, particularly in patients with pancolitis, could not be confirmed.
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Affiliation(s)
- U T Hacker
- Medizinische Klinik, Klinikum Innenstadt, University Munich, Germany
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Affiliation(s)
- Z Yao
- Immungenetics Laboratory, Kinderpoliklinik der Ludwig-Maximilians-Universität München, Pettenkoferstr. 8 a, 80336 München, Germany
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