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Leitner K, Tsibulak I, Wieser V, Penz M, Fiegl H, Marth C, Zeimet AG. JARID1B beim Ovarialkarzinom. Geburtshilfe Frauenheilkd 2022. [DOI: 10.1055/s-0042-1746162] [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] Open
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2
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Fink S, Leitner K, Amort FM. Empowerment von Menschen mit chronischer Herzinsuffizienz in Österreich, Review 2009_2019. Das Gesundheitswesen 2021. [DOI: 10.1055/s-0041-1732042] [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] [Indexed: 10/20/2022]
Affiliation(s)
- S Fink
- Institut für Gesundheits- und Tourismusmanagement, FH JOANNEUM – University of Applied Sciences
| | - K Leitner
- Institut für Gesundheits- und Tourismusmanagement, FH JOANNEUM – University of Applied Sciences
| | - FM Amort
- Institut für Gesundheits- und Tourismusmanagement, FH JOANNEUM – University of Applied Sciences
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Guger M, Raschbacher S, Kellermair L, Vosko MR, Eggers C, Forstner T, Leitner K, Fuchs A, Fellner F, Ransmayr G. Caregiver burden in patients with behavioural variant frontotemporal dementia and non-fluent variant and semantic variant primary progressive aphasia. J Neural Transm (Vienna) 2021; 128:1623-1634. [PMID: 34282470 PMCID: PMC8528762 DOI: 10.1007/s00702-021-02378-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 07/01/2021] [Indexed: 11/30/2022]
Abstract
Studies on caregiver burden in patients with frontotemporal lobar degeneration are rare, differ methodologically and show variable results. Single center longitudinal pilot study on caregiver burden and potential risk factors in patients with behavioural variant frontotemporal dementia (bvFTD) and semantic (svPPA) and non-fluent variants (nfvPPA) primary progressive aphasia. Forty-six bvFTD, nine svPPA, and six nfvPPA patients and caring relatives were analysed for up to 2 years using the Mini-Mental State Examination as global measure for cognitive performance, Frontal Assessment Battery (frontal lobe functions), Frontal Behavioural Inventory (personality and behaviour), Neuropsychiatric Inventory (dementia-related neuropsychiatric symptoms), Barthel Index and Lawton IADL Scale (basic and instrumental activities of daily living), the Caregiver Strain Index (CSI), and in most participants also the Zarit Burden Interview (ZBI). CSI baseline sum scores were highest in bvFTD (mean ± SD 5.5 ± 3.4, median 5, IQR 6), intermediate in svPPA (2.9 ± 2.3; 3; 3.5) and low in nfvPPA (1.6 ± 2.1; 1; 2). Similar differences of caregiver burden were found using the ZBI. During follow-up, CSI and ZBI sum scores deteriorated in svPPA, not in bvFTD and nfvPPA, and correlated significantly with personality and behaviour, neuropsychiatric symptoms, caregiver age, and instrumental, but not basic activities of daily living, Mini-Mental State Examination scores or frontal lobe functions. This study reveals differences in caregiver burden in variants of frontotemporal lobar degeneration. Caregivers should be systematically asked for caregiver burden from the time of the diagnosis to provide comprehensive support in time.
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Affiliation(s)
- Michael Guger
- Department of Neurology 2, Med Campus III, Kepler University Hospital GmbH, Krankenhausstr. 9, 4021, Linz, Austria
- Medical Faculty, Johannes Kepler University, Linz, Austria
| | - Stefan Raschbacher
- Department of Neurology 2, Med Campus III, Kepler University Hospital GmbH, Krankenhausstr. 9, 4021, Linz, Austria
| | - Lukas Kellermair
- Department of Neurology 2, Med Campus III, Kepler University Hospital GmbH, Krankenhausstr. 9, 4021, Linz, Austria
- Medical Faculty, Johannes Kepler University, Linz, Austria
| | - Milan R Vosko
- Department of Neurology 2, Med Campus III, Kepler University Hospital GmbH, Krankenhausstr. 9, 4021, Linz, Austria
- Medical Faculty, Johannes Kepler University, Linz, Austria
| | - Christian Eggers
- Department of Neurology 2, Med Campus III, Kepler University Hospital GmbH, Krankenhausstr. 9, 4021, Linz, Austria
- Medical Faculty, Johannes Kepler University, Linz, Austria
| | - Thomas Forstner
- Department of Applied Systems Research and Statistics, Johannes Kepler University, Linz, Austria
| | - Karin Leitner
- Clinical and Health Psychology Unit, Med Campus III, Kepler University Hospital GmbH, Linz, Austria
| | - Alexandra Fuchs
- Clinical and Health Psychology Unit, Med Campus III, Kepler University Hospital GmbH, Linz, Austria
| | - Franz Fellner
- Medical Faculty, Johannes Kepler University, Linz, Austria
- Central Radiology Institute, Med Campus III, Kepler University Hospital GmbH, Linz, Austria
| | - Gerhard Ransmayr
- Department of Neurology 2, Med Campus III, Kepler University Hospital GmbH, Krankenhausstr. 9, 4021, Linz, Austria.
- Medical Faculty, Johannes Kepler University, Linz, Austria.
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Puntigam R, Slama J, Brugger D, Leitner K, Schedle K, Wetscherek-Seipelt G, Wetscherek W. Fermentation of Whole Grain Sorghum ( Sorghum bicolor (L.) Moench) with Different Dry Matter Concentrations: Effect on the Apparent Total Tract Digestibility of Energy, Crude Nutrients and Minerals in Growing Pigs. Animals (Basel) 2021; 11:ani11051199. [PMID: 33921983 PMCID: PMC8143492 DOI: 10.3390/ani11051199] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 04/11/2021] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Due to climate change and pests as result of maize monoculture, the need of diversification of crop rotation forces researchers to look for alternative grains for animal nutrition. Furthermore, grain fermentation may increase the nutritional value of feed and, simultaneously, decrease costs of feed conservation because the necessity for grain drying and associated energy costs are reduced. In this context, the cultivation and integration of early harvested and fermented sorghum grain in pig diets might be an interesting strategy for the substitution of maize. Therefore, we tested the nutritional value of three varieties of fermented sorghum grains with gradual differences in total dry matter, in a Latin-Square experiment comprising growing pigs. Results indicated there is a potential for improving the nutrient digestibility of sorghum-based pig diets by using early harvested and fermented whole sorghum grain with lower dry matter concentration. Especially the need for inorganic phosphorus supplementation and, hence, the fecal phosphorus emissions were significantly reduced. Abstract This study investigated the effects of sorghum ensiled as whole grains with different dry matter concentrations on the apparent total tract digestibility (ATTD) of energy, crude nutrients and minerals in growing pigs. Whole grain sorghum batches with varying dry matter (DM) concentrations of 701 (S1), 738 (S2) and 809 g kg−1 (S3) due to different dates of harvest from the same arable plot, were stored in air-tight kegs (6 L) for 6 months to ensure complete fermentation. Subsequently, 9 crossbred barrows (34.6 ± 1.8 kg; (Duroc x Landrace) × Piétrain)) were used in a 3 × 3 Latin square feeding experiment. Diets were based on the respective sorghum grain silage and were supplemented with additional amino acids, minerals and vitamins to meet or exceed published feeding recommendations for growing pigs. The ATTD of gross energy, dry matter, organic matter, nitrogen-free extracts, and crude ash were higher in S1 compared to S3 treatments (p ≤ 0.05), while S2 was intermediate. Pigs fed S1 showed significantly higher ATTD of phosphorus (P) compared to all other groups while ATTD of calcium was unaffected irrespective of the feeding regime. In conclusion, growing pigs used whole grain sorghum fermented with a DM concentration of 701 g kg−1 (S1) most efficiently. In particular, the addition of inorganic P could have been reduced by 0.39 g kg−1 DM when using this silage compared to the variant with the highest DM value (809 g kg−1).
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Affiliation(s)
- Reinhard Puntigam
- Faculty of Agricultural and Environmental Sciences, University Rostock, 18059 Rostock, Germany;
- Correspondence:
| | - Julia Slama
- Faculty of Agricultural and Environmental Sciences, University Rostock, 18059 Rostock, Germany;
| | - Daniel Brugger
- Institute of Animal Nutrition, Vetsuisse-Faculty, University of Zurich, 8057 Zurich, Switzerland;
| | - Karin Leitner
- Institute of Animal Nutrition, Livestock Products, and Nutrition Physiology, University of Natural Resources and Life Sciences, 1190 Vienna, Austria; (K.L.); (K.S.); (G.W.-S.); (W.W.)
| | - Karl Schedle
- Institute of Animal Nutrition, Livestock Products, and Nutrition Physiology, University of Natural Resources and Life Sciences, 1190 Vienna, Austria; (K.L.); (K.S.); (G.W.-S.); (W.W.)
| | - Gabriela Wetscherek-Seipelt
- Institute of Animal Nutrition, Livestock Products, and Nutrition Physiology, University of Natural Resources and Life Sciences, 1190 Vienna, Austria; (K.L.); (K.S.); (G.W.-S.); (W.W.)
| | - Wolfgang Wetscherek
- Institute of Animal Nutrition, Livestock Products, and Nutrition Physiology, University of Natural Resources and Life Sciences, 1190 Vienna, Austria; (K.L.); (K.S.); (G.W.-S.); (W.W.)
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Leitner K, Wieser V, Tsibulak I, Knoll K, Kögl J, Reimer D, Marth C, Fiegl H, Zeimet AG. Die Expression der Histon-Methyltransferase EZH2 beim Ovarialkarziom. Geburtshilfe Frauenheilkd 2020. [DOI: 10.1055/s-0039-3403392] [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] [Indexed: 10/24/2022] Open
Affiliation(s)
- K Leitner
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - V Wieser
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - I Tsibulak
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - K Knoll
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - J Kögl
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - D Reimer
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - C Marth
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - H Fiegl
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - A G Zeimet
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
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Kögl J, Wieser V, Knoll K, Leitner K, Tsibulak I, Fiegl H, Marth C, Zeimet AG. Hochregulation von PDL-1 Expression durch EGF und Zytokine in der Ovarialkarzinom-Zelllinie (HOC-7). Geburtshilfe Frauenheilkd 2020. [DOI: 10.1055/s-0039-3403391] [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] [Indexed: 10/24/2022] Open
Affiliation(s)
- J Kögl
- Universitätsklinik für Gynäkologie und Geburtshilfe, Medizinische Universität Innsbruck
| | - V Wieser
- Universitätsklinik für Gynäkologie und Geburtshilfe, Medizinische Universität Innsbruck
| | - K Knoll
- Universitätsklinik für Gynäkologie und Geburtshilfe, Medizinische Universität Innsbruck
| | - K Leitner
- Universitätsklinik für Gynäkologie und Geburtshilfe, Medizinische Universität Innsbruck
| | - I Tsibulak
- Universitätsklinik für Gynäkologie und Geburtshilfe, Medizinische Universität Innsbruck
| | - H Fiegl
- Universitätsklinik für Gynäkologie und Geburtshilfe, Medizinische Universität Innsbruck
| | - C Marth
- Universitätsklinik für Gynäkologie und Geburtshilfe, Medizinische Universität Innsbruck
| | - A G Zeimet
- Universitätsklinik für Gynäkologie und Geburtshilfe, Medizinische Universität Innsbruck
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Leitner K, Schaffenrath H, D'Costa E, Steiner N, Nachbaur D. Diagnose und interdisziplinäres Management einer akuten myeloischen Leukämie im Wochenbett. Geburtshilfe Frauenheilkd 2019. [DOI: 10.1055/s-0039-1693876] [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] [Indexed: 10/26/2022] Open
Affiliation(s)
- K Leitner
- Abteilung für Gynäkologie und Geburtshilfe, Medizinische Universität Innsbruck, Innsbruck, Austria
| | - H Schaffenrath
- Abteilung für Gynäkologie und Geburtshilfe, Medizinische Universität Innsbruck, Innsbruck, Austria
| | - E D'Costa
- Abteilung für Gynäkologie und Geburtshilfe, Medizinische Universität Innsbruck, Innsbruck, Austria
| | - N Steiner
- Abteilung für Innere Medizin V, Medizinische Universität Innsbruck, Innsbruck, Austria
| | - D Nachbaur
- Abteilung für Innere Medizin V, Medizinische Universität Innsbruck, Innsbruck, Austria
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Leitner K, Wieser V, Tsibulak I, Degasper C, Welponer H, Reimer D, Wiedemair A, Marth C, Fiegl H, Zeimet AG. Die Expression von SMARCA4 beim Ovarialkarzinom. Geburtshilfe Frauenheilkd 2019. [DOI: 10.1055/s-0039-1681992] [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] [Indexed: 10/27/2022] Open
Affiliation(s)
- K Leitner
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - V Wieser
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - I Tsibulak
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - C Degasper
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - H Welponer
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - D Reimer
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - A Wiedemair
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - C Marth
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - H Fiegl
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - AG Zeimet
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
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Knoll K, Berger A, Tsibulak I, Leitner K, Degasper C, Welploner H, Wieser V, Marth C, Fiegl H, Zeimet AG. Locusspezifische TP53-Mutationsanalyse. Geburtshilfe Frauenheilkd 2019. [DOI: 10.1055/s-0039-1681990] [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] [Indexed: 10/27/2022] Open
Affiliation(s)
- K Knoll
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - A Berger
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - I Tsibulak
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - K Leitner
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - C Degasper
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - H Welploner
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - V Wieser
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - C Marth
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - H Fiegl
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
| | - AG Zeimet
- Universitätsklinik für Frauenheilkunde, Medizinische Universität Innsbruck
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O'Boye A, Leitner K, Kelly M, Wright J, Lee J, Tomic R, Bhorade S. Frailty is Highly Prevalent in Lung Transplant Candidates and Varies by Frailty Tool. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.838] [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: 10/27/2022] Open
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Wieser V, Tsibulak I, Degasper C, Welponer H, Leitner K, Sprung S, Haybäck J, Fiegl H, Marth C, Zeimet AG. RANKL als unabhängiger Prognoseparameter für Patientinnen mit Ovarialkarzinom. Geburtshilfe Frauenheilkd 2019. [DOI: 10.1055/s-0039-1682001] [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] [Indexed: 10/27/2022] Open
Affiliation(s)
- V Wieser
- Universitätsklinik für Frauenheilkunde und Geburtshilfe der Med. Universität Innsbruck
| | - I Tsibulak
- Universitätsklinik für Frauenheilkunde und Geburtshilfe der Med. Universität Innsbruck
| | - C Degasper
- Universitätsklinik für Frauenheilkunde und Geburtshilfe der Med. Universität Innsbruck
| | - H Welponer
- Universitätsklinik für Frauenheilkunde und Geburtshilfe der Med. Universität Innsbruck
| | - K Leitner
- Universitätsklinik für Frauenheilkunde und Geburtshilfe der Med. Universität Innsbruck
| | - S Sprung
- Institute für Pathologie der Med. Universität Innsbruck
| | - J Haybäck
- Institute für Pathologie der Med. Universität Innsbruck
| | - H Fiegl
- Universitätsklinik für Frauenheilkunde und Geburtshilfe der Med. Universität Innsbruck
| | - C Marth
- Universitätsklinik für Frauenheilkunde und Geburtshilfe der Med. Universität Innsbruck
| | - AG Zeimet
- Universitätsklinik für Frauenheilkunde und Geburtshilfe der Med. Universität Innsbruck
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Glueck J, Leitner K, Oberlojer A. PROFESSIONAL WISDOM: WISDOM AND NON-WISDOM MEMORIES OF TEACHERS AND MANAGERS. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.4995] [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] [Indexed: 11/13/2022] Open
Affiliation(s)
- J. Glueck
- Psychology, Alpen-Adria-Universitaet Klagenfurt, Klagenfurt, Austria
| | - K. Leitner
- Psychology, Alpen-Adria-Universitaet Klagenfurt, Klagenfurt, Austria
| | - A. Oberlojer
- Psychology, Alpen-Adria-Universitaet Klagenfurt, Klagenfurt, Austria
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Leitner K, Kulisch J, Schneider H, Weiss T, Gollub C, Sommer H. Das Versagen von Lithium-Schwefel-Zellen - Untersuchungen zur Ursache. CHEM-ING-TECH 2014. [DOI: 10.1002/cite.201450659] [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: 11/08/2022]
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Wiedermann U, Kletecka-Pulker M, Rommel A, Kollaritsch H, Cichoń P, Vetter N, Kautzky-Willer A, Novak-Zezula S, Trummer U, Binder-Fritz C, Akkaya-Kalayci T, Hanschitz AJ, Dachs P, Zehetgruber M, Habersack H, Allesch J, Leitner K, Parrag S. Migration – epidemiologische, soziokulturelle und medizinische Aspekte. Wien Klin Wochenschr 2014. [DOI: 10.1007/s00508-013-0462-8] [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: 11/29/2022]
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Elfenthal L, Leitner K, Schnltze JW, Meyer O. Migration of high energy defects after Pd-implantation in oxide films on titanium. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/bbpc.19870910441] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Mayr B, Hofecker G, Zimmer H, Schlerka G, Leitner K, Schleger W. Untersuchungen an peripheren Lymphozytenpopulationen leukoseinfizierter und leukosefreier Rinder. ACTA ACUST UNITED AC 2010. [DOI: 10.1111/j.1439-0450.1979.tb00841.x] [Citation(s) in RCA: 2] [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: 11/30/2022]
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Goebel G, Pfeiffer KP, Schabetsberger T, Kalozy C, Fiegl H, Leitner K. Relevance and management of methylation data in electronic health records. Stud Health Technol Inform 2009; 150:135-139. [PMID: 19745283] [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: 05/28/2023]
Abstract
In this paper we give an overview of challenges and chances of the integration of methylation data into Electronic Health Records. Perspectives of methylation data in terms of clinical relevance and characteristics of these data are shown. Among several standards OpenEHR, HL7 CG and LOINC are identified as starting point for the representation and communication of methylation data within the clinical context.
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Affiliation(s)
- Georg Goebel
- Department for Medical Statistics, Informatics and Health Economics, Medical University Innsbruck, A-6020 Innsbruck, Austria.
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Leitner K, Ellinger I, Grill M, Brabec M, Fuchs R. Efficient Apical IgG Recycling and Apical-to-basolateral Transcytosis in Polarized BeWo Cells Overexpressing hFcRn. Placenta 2006; 27:799-811. [PMID: 16229888 DOI: 10.1016/j.placenta.2005.08.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [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] [Received: 07/04/2005] [Revised: 08/25/2005] [Accepted: 08/25/2005] [Indexed: 10/25/2022]
Abstract
The human neonatal Fcgamma-receptor (hFcRn) involved in overall maternal-fetal IgG transmission is expressed in placental villous syncytiotrophoblast. However, the role of hFcRn in IgG transport and trafficking across this cell layer is poorly characterized. To gain insight into this mechanism we have overexpressed functional hFcRn in trophoblast-derived BeWo cells (BeWo/hFcRn cells) [Ellinger I, Reischer H, Lehner C, Leitner K, Hunziker W, Fuchs R. Placenta 2005;26:171-82] since parental BeWo cells endogenously express low levels of the receptor. We now demonstrate that hFcRn overexpression differentially affected apical-to-basolateral transcytosis and apical recycling: whereas IgG transcytosis was reduced by 35%, IgG recycling was stimulated by 100% as compared to parental cells, indicating that hFcRn plays a role in both processes. The endosomal compartments involved in hFcRn/IgG transport after apical IgG internalization were then analyzed by confocal immunofluorescence microscopy using compartment specific markers. hFcRn/IgG were found in apical early endosomes, in transferrin recycling compartments and in vesicles near the basolateral plasma membrane, presumably transcytotic vesicles. Neither hFcRn nor IgG was routed to the degradative pathway to lysosomes. These transport and localization data are in accordance with efficient hFcRn-mediated apical IgG recycling and basolateral directed IgG transcytosis in placental trophoblasts.
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Affiliation(s)
- K Leitner
- Department of Pathophysiology, Center for Physiology and Pathophysiology, Medical University of Vienna, Währinger Gürtel 18-20, A-1090 Vienna, Austria
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Ellinger I, Reischer H, Lehner C, Leitner K, Hunziker W, Fuchs R. Overexpression of the human neonatal Fc-receptor alpha-chain in trophoblast-derived BeWo cells increases cellular retention of beta2-microglobulin. Placenta 2005; 26:171-82. [PMID: 15708118 DOI: 10.1016/j.placenta.2004.04.014] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/29/2004] [Indexed: 11/19/2022]
Abstract
Major histocompatibility complex (MHC) class I and MHC class I-type molecules such as the neonatal Fcgamma-receptor, FcRn, are heterodimers consisting of a transmembrane alpha-chain non-covalently associated with beta2-microglobulin (beta2m). Human placental villous syncytiotrophoblast (STB) lacks MHC class I molecules, but express hFcRn that mediates materno-fetal transmission of immunoglobulin G (IgG). Trophoblast-derived BeWo cells that are used to study placental IgG transport likewise express beta2m and low levels of hFcRn alpha-chain. The contribution of FcRn alpha-chain in retention and subcellular distribution of beta2m in STB and BeWo cells is unclear. To investigate this issue, we increased expression of hFcRn alpha-chain in BeWo cells (BeWo/hFcRn) by cDNA transfection. Overexpressed hFcRn protein exhibited the characteristic pH-dependent IgG binding and association with beta2m. In comparison to parental BeWo cells, beta2m mRNA levels in BeWo/hFcRn cells were not significantly altered, but total cell-associated beta2m protein was increased by 120%. Treatment of BeWo and BeWo/hFcRn cells with brefeldin A, an inhibitor of the secretory pathway, abrogated this effect, demonstrating that hFcRn alpha-chain expression retained otherwise secreted beta2m. Flow cytometry revealed that beta2m plasma membrane expression was unaffected by alpha-chain overexpression whereas by fluorescence microscopy a preferential staining of beta2m in peripheral endosomes was observed.
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Affiliation(s)
- I Ellinger
- Department of Pathophysiology, Medical University of Vienna, Vienna, Austria
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Leitner K, Szlauer R, Ellinger I, Ellinger A, Zimmer KP, Fuchs R. Placental alkaline phosphatase expression at the apical and basal plasma membrane in term villous trophoblasts. J Histochem Cytochem 2001; 49:1155-64. [PMID: 11511684 DOI: 10.1177/002215540104900909] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [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: 11/16/2022] Open
Abstract
Human placental alkaline phosphatase (PLAP) was localized at the apical and basal plasma membrane of syncytiotrophoblasts and at the surface of cytotrophoblasts in term chorionic villi using immunoelectron microscopy. Similarly, apical and basolateral PLAP expression was found in polarized trophoblast-derived BeWo cells. Trophoblasts isolated from term placentas exhibited mainly vesicular PLAP immunofluorescence staining immediately after isolation. After in vitro differentiation into syncytia, PLAP plasma membrane expression was upregulated and exceeded that observed in mononuclear trophoblasts. These data call for caution in using PLAP as a morphological marker to differentiate syncytiotrophoblasts from cytotrophoblasts or as a marker enzyme for placental brush-border membranes. (J Histochem Cytochem 49:1155-1164, 2001)
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Affiliation(s)
- K Leitner
- Department of Pathophysiology, University of Vienna, Vienna, Austria
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22
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Kepplinger KJ, Förstner G, Kahr H, Leitner K, Pammer P, Groschner K, Soldatov NM, Romanin C. Molecular determinant for run-down of L-type Ca2+ channels localized in the carboxyl terminus of the 1C subunit. J Physiol 2000; 529 Pt 1:119-30. [PMID: 11080256 PMCID: PMC2270188 DOI: 10.1111/j.1469-7793.2000.00119.x] [Citation(s) in RCA: 29] [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] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
1. The role of the sequence 1572-1651 in the C-terminal tail of the alpha1C subunit in run-down of Ca2+ channels was studied by comparing functional properties of the conventional alpha1C,77 channel with those of three isoforms carrying alterations in this motif. 2. The pore-forming alpha1C subunits were co-expressed with alpha2delta and beta2a subunits in HEK-tsA201 cells, a subclone of the human embryonic kidney cell line, and studied by whole-cell and single-channel patch-clamp techniques. 3. Replacement of amino acids 1572-1651 in alpha1C,77 with 81 different amino acids leading to alpha1C,86 significantly altered run-down behaviour. Run-down of Ba2+ currents was rapid with alpha1C,77 channels, but was slow with alpha1C,86. 4. Transfer of the alpha1C,86 segments L (amino acids 1572-1598) or K (amino acids 1595-1652) into the alpha1C,77 channel yielded alpha1C,77L and alpha1C,77K channels, respectively, the run-down of which resembled more that of alpha1C,77. These results demonstrate that a large stretch of sequence between residues 1572 and 1652 of alpha1C,86 renders Ca2+ channels markedly resistant to run-down. 5. The protease inhibitor calpastatin added together with ATP was able to reverse the run-down of alpha1C,77 channels. Calpastatin expression was demonstrated in the HEK-tsA cells by Western blot analysis. 6. These results indicate a significant role of the C-terminal sequence 1572-1651 of the alpha1C subunit in run-down of L-type Ca2+ channels and suggest this sequence as a target site for a modulatory effect by endogenous calpastatin.
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Affiliation(s)
- K J Kepplinger
- Institute for Biophysics, University of Linz, A-4040 Linz, Austria
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23
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Hiebl J, Alberts DP, Banyard AF, Baresch K, Baumgartner H, Bernwieser I, Bhatnagar PK, Blanka M, Bodenteich M, Chen T, Esch PM, Kollmann H, Lantos I, Leitner K, Mayrhofer G, Patel R, Rio A, Rovenszky F, Stevenson D, Tubman KD, Undheim K, Weihtrager H, Welz W, Winkler K. Large-scale synthesis of hematoregulatory nonapeptide SK&F 107647 by fragment coupling. J Pept Res 1999; 54:54-65. [PMID: 10448970 DOI: 10.1034/j.1399-3011.1999.00089.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
Linear and convergent routes for the large-scale preparation of the hematoregulatory nonapeptide (Glp-Glu-Asp)2-DAS-(Lys)2 (2, SK&F 107647) were investigated. A convergent approach ('3 + 2'-route employing Boc-and benzyl ester protecting groups) was selected for the preparation of multihundred-gram quantities of 2. Key steps were the preparation and the coupling of tripeptide hydrochloride (HCl.H)2-DAS-(Lys(Z)-OBn)2 (6, DAS-2,7-L,L-diaminosuberic acid) and tripeptide Glp-Glu(OBn)-Asp(OBn)-OH (26). Several coupling reagents were investigated in order to reduce the amount of epimerization of this fragment coupling. TDBTU [O-(3,4-dihydro-4-oxo-1,2,3-benzotriazin-3-yl-1,1,3,3-tetrameth yluronium tetrafluoroborate] was identified as the condensation reagent of choice. Using this synthetic route > 97% pure final product in an overall yield of 35% calculated on di-Boc protected 2,7-L,L-diaminosuberic acid was prepared.
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Affiliation(s)
- J Hiebl
- Topcro Pharma Research GmbH, Linz, Austria
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Egelseer EM, Leitner K, Jarosch M, Hotzy C, Zayni S, Sleytr UB, Sára M. The S-layer proteins of two Bacillus stearothermophilus wild-type strains are bound via their N-terminal region to a secondary cell wall polymer of identical chemical composition. J Bacteriol 1998; 180:1488-95. [PMID: 9515918 PMCID: PMC107049 DOI: 10.1128/jb.180.6.1488-1495.1998] [Citation(s) in RCA: 75] [Impact Index Per Article: 2.9] [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: 02/06/2023] Open
Abstract
Two Bacillus stearothermophilus wild-type strains were investigated regarding a common recognition and binding mechanism between the S-layer protein and the underlying cell envelope layer. The S-layer protein from B. stearothermophilus PV72/p6 has a molecular weight of 130,000 and assembles into a hexagonally ordered lattice. The S-layer from B. stearothermophilus ATCC 12980 shows oblique lattice symmetry and is composed of subunits with a molecular weight of 122,000. Immunoblotting, peptide mapping, N-terminal sequencing of the whole S-layer protein from B. stearothermophilus ATCC 12980 and of proteolytic cleavage fragments, and comparison with the S-layer protein from B. stearothermophilus PV72/p6 revealed that the two S-layer proteins have identical N-terminal regions but no other extended structurally homologous domains. In contrast to the heterogeneity observed for the S-layer proteins, the secondary cell wall polymer isolated from peptidoglycan-containing sacculi of the different strains showed identical chemical compositions and comparable molecular weights. The S-layer proteins could bind and recrystallize into the appropriate lattice type on native peptidoglycan-containing sacculi from both organisms but not on those extracted with hydrofluoric acid, leading to peptidoglycan of the A1gamma chemotype. Affinity studies showed that only proteolytic cleavage fragments possessing the complete N terminus of the mature S-layer proteins recognized native peptidoglycan-containing sacculi as binding sites or could associate with the isolated secondary cell wall polymer, while proteolytic cleavage fragments missing the N-terminal region remained unbound. From the results obtained in this study, it can be concluded that S-layer proteins from B. stearothermophilus wild-type strains possess an identical N-terminal region which is responsible for anchoring the S-layer subunits to a secondary cell wall polymer of identical chemical composition.
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Affiliation(s)
- E M Egelseer
- Zentrum für Ultrastrukturforschung und Ludwig Boltzmann-Institut für Molekulare Nanotechnologie, Universität für Bodenkultur, Wien, Austria
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Steltzer H, Blazek G, Gabriel A, Leitner K, Mayer N, Müller C, Tüchy GL, Zimpfer M. Two-dimensional transesophageal echocardiography in early diagnosis and treatment of hemodynamic disturbances during liver transplantation. Transplant Proc 1991; 23:1957-8. [PMID: 2063445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- H Steltzer
- Department of Anesthesiology and General Intensive Care, University of Vienna, Austria
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Schultze J, Elfenthal L, Leitner K, Meyer O. Modification of oxide films by ion implantation: TiO2-films modified by Ti+ and O+ as example. Electrochim Acta 1988. [DOI: 10.1016/0013-4686(88)80088-4] [Citation(s) in RCA: 19] [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] [Indexed: 11/28/2022]
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Schultze J, Elfenthal L, Leitner K, Meyer O. Electrochemical studies of TiO2 films with various palladium implantation profiles. ACTA ACUST UNITED AC 1987. [DOI: 10.1016/0025-5416(87)90219-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Mayr B, Hofecker G, Zimmer H, Schlerka G, Leitner K, Schleger W. [Studies of peripheral leukocyte populations in cattle with and without leukosis]. Zentralbl Veterinarmed B 1979; 26:492-9. [PMID: 232344] [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: 12/13/2022]
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