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Seekircher L, Siller A, Amato M, Tschiderer L, Balog A, Astl M, Schennach H, Willeit P. HemoCue Hb-801 Provides More Accurate Hemoglobin Assessment in Blood Donors Than OrSense NBM-200. Transfus Med Rev 2024; 38:150826. [PMID: 38581862 DOI: 10.1016/j.tmrv.2024.150826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 03/11/2024] [Accepted: 03/14/2024] [Indexed: 04/08/2024]
Abstract
Hemoglobin levels are commonly assessed to prevent causing or worsening of anemia in prospective blood donors. We compared head-to-head the accuracy of different technologies for measuring hemoglobin suitable for use in mobile donation units. We included 144 persons donating platelets at the Central Institute for Blood Transfusion and Immunology in Innsbruck, Austria. Hemoglobin levels were measured in venous blood using the portable hemoglobinometer HemoCue Hb-801 and noninvasively using OrSense NBM-200, and compared to values obtained with the Sysmex XN-430, an automated hematology analyzer employing the sodium lauryl sulphate method, which is broadly used as reference method in everyday clinical practice. Mean age of participants was 34.2 years (SD 13.0); 34.0% were female. Hemoglobin values measured with HemoCue were more strongly correlated with the Sysmex XN-430 (r = 0.90 [95% CI: 0.87-0.93]) than measured with OrSense (r = 0.49 [0.35-0.60]). On average, HemoCue overestimated hemoglobin by 0.40 g/dL (0.31-0.48) and OrSense by 0.75 g/dL (95% CI: 0.54-0.96). When using OrSense, we found evidence for higher overestimation at higher hemoglobin levels (proportional bias) specifically in females but not in males (Pdifference = .003). Sensitivity and specificity for classifying donors according to the hemoglobin donation thresholds were 99.2% (95% CI: 95.3%-100.0%) and 43.8% (23.1%-66.8%) for HemoCue vs 95.3% (89.9%-98.0%) and 12.5% (2.2%-37.3%) for OrSense. Areas under the receiver operating characteristic curves were higher using HemoCue vs OrSense both in females (0.933 vs 0.547; P = .044) and males (0.948 vs 0.628; P < .001). HemoCue Hb-801 measures hemoglobin more accurately than OrSense NBM-200 in the setting of mobile blood donation units. Our findings are particularly relevant for females, having in mind that anemia is more prevalent in females than in males.
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Affiliation(s)
- Lisa Seekircher
- Department of Medical Statistics, Informatics, and Health Economics, Medical University of Innsbruck, Innsbruck, Austria
| | - Anita Siller
- Central Institute for Blood Transfusion and Immunology, University Hospital of Innsbruck, Tirol Kliniken GmbH, Innsbruck, Austria
| | - Marco Amato
- Central Institute for Blood Transfusion and Immunology, University Hospital of Innsbruck, Tirol Kliniken GmbH, Innsbruck, Austria
| | - Lena Tschiderer
- Department of Medical Statistics, Informatics, and Health Economics, Medical University of Innsbruck, Innsbruck, Austria
| | - Agnes Balog
- Central Institute for Blood Transfusion and Immunology, University Hospital of Innsbruck, Tirol Kliniken GmbH, Innsbruck, Austria
| | - Manfred Astl
- Central Institute for Blood Transfusion and Immunology, University Hospital of Innsbruck, Tirol Kliniken GmbH, Innsbruck, Austria
| | - Harald Schennach
- Central Institute for Blood Transfusion and Immunology, University Hospital of Innsbruck, Tirol Kliniken GmbH, Innsbruck, Austria
| | - Peter Willeit
- Department of Medical Statistics, Informatics, and Health Economics, Medical University of Innsbruck, Innsbruck, Austria; Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK.
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Kirchmair A, Nemati N, Lamberti G, Trefny M, Krogsdam A, Siller A, Hörtnagl P, Schumacher P, Sopper S, Sandbichler A, Zippelius A, Ghesquière B, Trajanoski Z. 13C tracer analysis reveals the landscape of metabolic checkpoints in human CD8 + T cell differentiation and exhaustion. Front Immunol 2023; 14:1267816. [PMID: 37928527 PMCID: PMC10620935 DOI: 10.3389/fimmu.2023.1267816] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 10/03/2023] [Indexed: 11/07/2023] Open
Abstract
Introduction Naïve T cells remain in an actively maintained state of quiescence until activation by antigenic signals, upon which they start to proliferate and generate effector cells to initiate a functional immune response. Metabolic reprogramming is essential to meet the biosynthetic demands of the differentiation process, and failure to do so can promote the development of hypofunctional exhausted T cells. Methods Here we used 13C metabolomics and transcriptomics to study the metabolism of CD8+ T cells in their complete course of differentiation from naïve over stem-like memory to effector cells and in exhaustion-inducing conditions. Results The quiescence of naïve T cells was evident in a profound suppression of glucose oxidation and a decreased expression of ENO1, downstream of which no glycolytic flux was detectable. Moreover, TCA cycle activity was low in naïve T cells and associated with a downregulation of SDH subunits. Upon stimulation and exit from quiescence, the initiation of cell growth and proliferation was accompanied by differential expression of metabolic enzymes and metabolic reprogramming towards aerobic glycolysis with high rates of nutrient uptake, respiration and lactate production. High flux in anabolic pathways imposed a strain on NADH homeostasis, which coincided with engagement of the proline cycle for mitochondrial redox shuttling. With acquisition of effector functions, cells increasingly relied on glycolysis as opposed to oxidative phosphorylation, which was, however, not linked to changes in mitochondrial abundance. In exhaustion, decreased effector function concurred with a reduction in mitochondrial metabolism, glycolysis and amino acid import, and an upregulation of quiescence-associated genes, TXNIP and KLF2, and the T cell suppressive metabolites succinate and itaconate. Discussion Overall, these results identify multiple metabolic features that regulate quiescence, proliferation and effector function, but also exhaustion of CD8+ T cells during differentiation. Thus, targeting these metabolic checkpoints may be a promising therapeutic strategy for both prevention of exhaustion and promotion of stemness of anti-tumor T cells.
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Affiliation(s)
- Alexander Kirchmair
- Institute of Bioinformatics, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Niloofar Nemati
- Institute of Bioinformatics, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Giorgia Lamberti
- Institute of Bioinformatics, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Marcel Trefny
- Department of Biomedicine, Cancer Immunology, University and University Hospital of Basel, Basel, Switzerland
| | - Anne Krogsdam
- Institute of Bioinformatics, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
- NGS Core Facility, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Anita Siller
- Central Institute for Blood Transfusion and Immunology, Tirol Kliniken GmbH, Innsbruck, Austria
| | - Paul Hörtnagl
- Central Institute for Blood Transfusion and Immunology, Tirol Kliniken GmbH, Innsbruck, Austria
| | - Petra Schumacher
- Core Facility FACS Sorting, University Clinic for Internal Medicine V, Medical University of Innsbruck, Innsbruck, Austria
| | - Sieghart Sopper
- Core Facility FACS Sorting, University Clinic for Internal Medicine V, Medical University of Innsbruck, Innsbruck, Austria
| | | | - Alfred Zippelius
- Department of Biomedicine, Cancer Immunology, University and University Hospital of Basel, Basel, Switzerland
| | - Bart Ghesquière
- Laboratory of Applied Mass Spectrometry, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
- Metabolomics Core Facility Leuven, Center for Cancer Biology, VIB, Leuven, Belgium
| | - Zlatko Trajanoski
- Institute of Bioinformatics, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
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Steixner S, Vahedi Shahandashti R, Siller A, Ulmer H, Reider N, Schennach H, Lass-Flörl C. Aspergillus terreus Antibody Serosurveillance in Tyrol: A Population-Based, Cross-Sectional Study of a Healthy Population. J Fungi (Basel) 2023; 9:1008. [PMID: 37888264 PMCID: PMC10607556 DOI: 10.3390/jof9101008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 10/06/2023] [Accepted: 10/11/2023] [Indexed: 10/28/2023] Open
Abstract
The rare, but emerging mold Aspergillus terreus is an important pathogen in some geographical areas, like Tyrol (Austria) and Houston (Texas). The reason for this high prevalence is unknown. The present serosurveillance study aimed to evaluate the trends in levels of A. terreus-specific IgG antibodies in various regions of Tyrol and to compare the results to the environmental spread of A. terreus in Tyrol. Therefore, 1058 serum samples from healthy blood donors were evaluated. Data revealed a significant difference between the Tyrolean Upland and Lowland. Moreover, female participants had higher A. terreus IgG antibody levels than male participants. The differences found in our study are consistent with the distributional differences in environmental and clinical samples described in previous studies, supporting that A. terreus IgG antibody levels reflect the environmental epidemiology of A. terreus in Tyrol.
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Affiliation(s)
- Stephan Steixner
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, 6020 Innsbruck, Tirol, Austria; (S.S.); (R.V.S.)
| | - Roya Vahedi Shahandashti
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, 6020 Innsbruck, Tirol, Austria; (S.S.); (R.V.S.)
| | - Anita Siller
- Central Institute for Blood Transfusion and Immunology, Tirol Kliniken GmbH, 6020 Innsbruck, Tirol, Austria; (A.S.); (H.S.)
| | - Hanno Ulmer
- Department of Medical Statistics, Informatics and Health Economics, Medical University of Innsbruck, 6020 Innsbruck, Tirol, Austria;
| | - Norbert Reider
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, 6020 Innsbruck, Tirol, Austria;
| | - Harald Schennach
- Central Institute for Blood Transfusion and Immunology, Tirol Kliniken GmbH, 6020 Innsbruck, Tirol, Austria; (A.S.); (H.S.)
| | - Cornelia Lass-Flörl
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, 6020 Innsbruck, Tirol, Austria; (S.S.); (R.V.S.)
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Schoenthaler M, Waltl L, Hasenoehrl T, Seher D, Lutz A, Aulinger L, Temml V, König S, Siller A, Braun DE, Garscha U, Werz O, Schuster D, Schennach H, Koeberle A, Matuszczak B. Novel thiazolopyridine derivatives of diflapolin as dual sEH/FLAP inhibitors with improved solubility. Bioorg Chem 2023; 139:106685. [PMID: 37418786 DOI: 10.1016/j.bioorg.2023.106685] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 06/12/2023] [Accepted: 06/13/2023] [Indexed: 07/09/2023]
Abstract
Inflammatory responses are orchestrated by a plethora of lipid mediators, and perturbations of their biosynthesis or degradation hinder resolution and lead to uncontrolled inflammation, which contributes to diverse pathologies. Small molecules that induce a switch from pro-inflammatory to anti-inflammatory lipid mediators are considered valuable for the treatment of chronic inflammatory diseases. Commonly used non-steroidal anti-inflammatory drugs (NSAIDs) are afflicted with side effects caused by the inhibition of beneficial prostanoid formation and redirection of arachidonic acid (AA) into alternative pathways. Multi-target inhibitors like diflapolin, the first dual inhibitor of soluble epoxide hydrolase (sEH) and 5-lipoxygenase-activating protein (FLAP), promise improved efficacy and safety but are confronted by poor solubility and bioavailability. Four series of derivatives bearing isomeric thiazolopyridines as bioisosteric replacement of the benzothiazole core and two series additionally containing mono- or diaza-isosteres of the phenylene spacer were designed and synthesized to improve solubility. The combination of thiazolo[5,4-b]pyridine, a pyridinylen spacer and a 3,5-Cl2-substituted terminal phenyl ring (46a) enhances solubility and FLAP antagonism, while preserving sEH inhibition. Moreover, the thiazolo[4,5-c]pyridine derivative 41b, although being a less potent sEH/FLAP inhibitor, additionally decreases thromboxane production in activated human peripheral blood mononuclear cells. We conclude that the introduction of nitrogen, depending on the position, not only enhances solubility and FLAP antagonism (46a), but also represents a valid strategy to expand the scope of application towards inhibition of thromboxane biosynthesis.
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Affiliation(s)
- Martin Schoenthaler
- Institute of Pharmacy, Department of Pharmaceutical Chemistry, Center for Chemistry and Biomedicine, University of Innsbruck, Innrain 80-82, A-6020 Innsbruck, Austria
| | - Lorenz Waltl
- Michael Popp Institute and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Mitterweg 24, A-6020 Innsbruck, Austria
| | - Thomas Hasenoehrl
- Institute of Pharmacy, Department of Pharmaceutical Chemistry, Center for Chemistry and Biomedicine, University of Innsbruck, Innrain 80-82, A-6020 Innsbruck, Austria
| | - David Seher
- Institute of Pharmacy, Department of Pharmaceutical Chemistry, Center for Chemistry and Biomedicine, University of Innsbruck, Innrain 80-82, A-6020 Innsbruck, Austria
| | - Anna Lutz
- Institute of Pharmacy, Department of Pharmaceutical Chemistry, Center for Chemistry and Biomedicine, University of Innsbruck, Innrain 80-82, A-6020 Innsbruck, Austria; Michael Popp Institute and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Mitterweg 24, A-6020 Innsbruck, Austria
| | - Lucia Aulinger
- Institute of Pharmacy, Department of Pharmaceutical Chemistry, Center for Chemistry and Biomedicine, University of Innsbruck, Innrain 80-82, A-6020 Innsbruck, Austria; Michael Popp Institute and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Mitterweg 24, A-6020 Innsbruck, Austria
| | - Veronika Temml
- Institute of Pharmacy, Department of Pharmaceutical and Medicinal Chemistry, Paracelsus Medical University Salzburg, Strubergasse 21, A-5020 Salzburg, Austria
| | - Stefanie König
- Institute of Pharmacy, Department of Pharmaceutical/Medicinal Chemistry, University of Greifswald, Friedrich-Ludwig-Jahn-Straße 17, D-17489 Greifswald, Germany
| | - Anita Siller
- Central Institute for Blood Transfusion and Immunology, Tirol Kliniken GmbH, Anichstraße 35, A-6020 Innsbruck, Austria
| | - Doris Elfriede Braun
- Institute of Pharmacy, Department of Pharmaceutical Technology, Josef-Moeller-Haus, University of Innsbruck, Innrain 52c, A-6020 Innsbruck, Austria
| | - Ulrike Garscha
- Institute of Pharmacy, Department of Pharmaceutical/Medicinal Chemistry, University of Greifswald, Friedrich-Ludwig-Jahn-Straße 17, D-17489 Greifswald, Germany
| | - Oliver Werz
- Department of Pharmaceutical/Medicinal Chemistry, Friedrich Schiller University Jena, Philosophenweg 14, D-07743 Jena, Germany
| | - Daniela Schuster
- Institute of Pharmacy, Department of Pharmaceutical and Medicinal Chemistry, Paracelsus Medical University Salzburg, Strubergasse 21, A-5020 Salzburg, Austria
| | - Harald Schennach
- Central Institute for Blood Transfusion and Immunology, Tirol Kliniken GmbH, Anichstraße 35, A-6020 Innsbruck, Austria
| | - Andreas Koeberle
- Michael Popp Institute and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Mitterweg 24, A-6020 Innsbruck, Austria.
| | - Barbara Matuszczak
- Institute of Pharmacy, Department of Pharmaceutical Chemistry, Center for Chemistry and Biomedicine, University of Innsbruck, Innrain 80-82, A-6020 Innsbruck, Austria.
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Bloch EM, Siller A, Tonnetti L, Drews SJ, Spencer BR, Hedges D, Mergenthal T, Weber-Schehl M, Astl M, Patel EU, Gaber M, Schennach H. Molecular Screening of Blood Donors for Babesia in Tyrol, Austria. Transfus Med Hemother 2023; 50:330-333. [PMID: 37767285 PMCID: PMC10521223 DOI: 10.1159/000528793] [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] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 12/19/2022] [Indexed: 09/29/2023] Open
Abstract
Introduction Babesia is a tick-borne intraerythrocytic parasite that is globally ubiquitous, yet understudied. Several species of Babesia have been shown to be transfusion-transmissible. Babesia has been reported in blood donors, animals, and ticks in the Tyrol (Western Austria), and regional cases of human babesiosis have been described. We sought to characterize the risk of Babesia to the local blood supply. Methods Prospective molecular testing was performed on blood donors who presented to regional, mobile blood collection drives in the Tyrol, Austria (27 May to October 4, 2021). Testing was conducted using the cobas® Babesia assay (Roche Molecular Systems, Inc.), a commercial PCR assay approved for blood donor screening that is capable of detecting the 4 primary species causing human babesiosis (i.e., B. microti, B. divergens, B. duncani, and B. venatorum). A confirmatory algorithm to manage initial PCR-reactive samples was developed, as were procedures for donor and product management. Results A total of 7,972 donors were enrolled and screened; 4,311 (54.1%) were male, with a median age of 47 years (IQR = 34-55). No positive cases of Babesia were detected, corresponding with an overall prevalence of 0.00% (95% CI: 0.00%, 0.05%). Discussion The findings suggest that the prevalence of Babesia is low in Austrian blood donors residing in the Tyrol, even during months of peak tick exposure. Although one cannot conclude the absence of Babesia in this population given the limited sample size, the findings suggest that the regional risk of transfusion-transmitted babesiosis is low.
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Affiliation(s)
- Evan M. Bloch
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Anita Siller
- Central Institute for Blood Transfusion and Immunology, Innsbruck, Austria
| | - Laura Tonnetti
- Holland Laboratories for the Biomedical Sciences, American Red Cross, Rockville, Maryland, USA
| | - Steven J. Drews
- Microbiology, Canadian Blood Services, Edmonton, Alberta, Canada
| | - Bryan R. Spencer
- Scientific Affairs, American Red Cross, Dedham, Massachusetts, USA
| | - Doris Hedges
- Blood donor service, Bavarian Red Cross, Wiesentheid, Germany
| | | | | | - Manfred Astl
- Central Institute for Blood Transfusion and Immunology, Innsbruck, Austria
| | - Eshan U. Patel
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Manfred Gaber
- Blood donor service Tyrol, Austrian Red Cross, Rum, Austria
| | - Harald Schennach
- Central Institute for Blood Transfusion and Immunology, Innsbruck, Austria
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Siller A, Hofer NT, Tomagra G, Burkert N, Hess S, Benkert J, Gaifullina A, Spaich D, Duda J, Poetschke C, Vilusic K, Fritz EM, Schneider T, Kloppenburg P, Liss B, Carabelli V, Carbone E, Ortner NJ, Striessnig J. β2-subunit alternative splicing stabilizes Cav2.3 Ca 2+ channel activity during continuous midbrain dopamine neuron-like activity. eLife 2022; 11:e67464. [PMID: 35792082 PMCID: PMC9307272 DOI: 10.7554/elife.67464] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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: 02/11/2021] [Accepted: 07/04/2022] [Indexed: 11/13/2022] Open
Abstract
In dopaminergic (DA) Substantia nigra (SN) neurons Cav2.3 R-type Ca2+-currents contribute to somatodendritic Ca2+-oscillations. This activity may contribute to the selective degeneration of these neurons in Parkinson's disease (PD) since Cav2.3-knockout is neuroprotective in a PD mouse model. Here, we show that in tsA-201-cells the membrane-anchored β2-splice variants β2a and β2e are required to stabilize Cav2.3 gating properties allowing sustained Cav2.3 availability during simulated pacemaking and enhanced Ca2+-currents during bursts. We confirmed the expression of β2a- and β2e-subunit transcripts in the mouse SN and in identified SN DA neurons. Patch-clamp recordings of mouse DA midbrain neurons in culture and SN DA neurons in brain slices revealed SNX-482-sensitive R-type Ca2+-currents with voltage-dependent gating properties that suggest modulation by β2a- and/or β2e-subunits. Thus, β-subunit alternative splicing may prevent a fraction of Cav2.3 channels from inactivation in continuously active, highly vulnerable SN DA neurons, thereby also supporting Ca2+ signals contributing to the (patho)physiological role of Cav2.3 channels in PD.
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Affiliation(s)
- Anita Siller
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of InnsbruckInnsbruckAustria
| | - Nadja T Hofer
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of InnsbruckInnsbruckAustria
| | - Giulia Tomagra
- Department of Drug Science, NIS Centre, University of TorinoTorinoItaly
| | - Nicole Burkert
- Institute of Applied Physiology, University of Ulm, Ulm, GermanyUlmGermany
| | - Simon Hess
- Institute for Zoology, Biocenter, University of CologneCologneGermany
| | - Julia Benkert
- Institute of Applied Physiology, University of Ulm, Ulm, GermanyUlmGermany
| | - Aisylu Gaifullina
- Institute of Applied Physiology, University of Ulm, Ulm, GermanyUlmGermany
| | - Desiree Spaich
- Institute of Applied Physiology, University of Ulm, Ulm, GermanyUlmGermany
| | - Johanna Duda
- Institute of Applied Physiology, University of Ulm, Ulm, GermanyUlmGermany
| | | | - Kristina Vilusic
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of InnsbruckInnsbruckAustria
| | - Eva Maria Fritz
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of InnsbruckInnsbruckAustria
| | - Toni Schneider
- Institute of Neurophysiology, University of CologneCologneGermany
| | - Peter Kloppenburg
- Institute for Zoology, Biocenter, University of CologneCologneGermany
| | - Birgit Liss
- Institute of Applied Physiology, University of Ulm, Ulm, GermanyUlmGermany
- Linacre College & New College, University of OxfordOxfordUnited Kingdom
| | | | - Emilio Carbone
- Department of Drug Science, NIS Centre, University of TorinoTorinoItaly
| | - Nadine Jasmin Ortner
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of InnsbruckInnsbruckAustria
| | - Jörg Striessnig
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of InnsbruckInnsbruckAustria
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Siller A, Wachter GA, Neururer S, Pfeifer B, Astl M, Borena W, Kimpel J, Elmer S, Spöck F, Vales A, Mühlbacher A, Gaber M, Willeit P, Schennach H. Prevalence of SARS-CoV-2 antibodies in healthy blood donors from the state of Tyrol, Austria, in summer 2020. Wien Klin Wochenschr 2021; 133:1272-1280. [PMID: 34698961 PMCID: PMC8546400 DOI: 10.1007/s00508-021-01963-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 09/28/2021] [Indexed: 01/08/2023]
Abstract
Background Seroepidemiological studies provide important insight into the spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV‑2) in our society. We aimed to determine seropositivity of SARS-CoV‑2 antibodies and its cross-sectional correlates in a large cohort of blood donors. Methods In this observational cohort study, we tested healthy blood donors residing in Tyrol, Austria, for SARS-CoV‑2 antibodies using the Abbott SARS-CoV‑2 IgG chemiluminescent microparticle immunoassay. We estimated 95% confidence intervals (95% CI) of seroprevalences using bootstrapping and tested for differences by participant characteristics using logistic regression. Findings Between 8 June and 4 September 2020, we screened 5345 healthy individuals at local blood donor sessions (mean age 42.7 years, SD 13.5 years, 46.7% female). Overall seroprevalence was 3.1% (95% CI 2.7–3.6%, 165 cases), which is 5.1-fold higher (95% CI 4.5–6.0%) than the case number identified by the health authorities in the state-wide testing program (0.6%; 4536 out of 757,634). Seroprevalence was higher in the district Landeck (16.6%, P < 0.001) and in individuals aged < 25 years (4.7%, P = 0.043), but did not differ by gender, blood types, or medication intake. The odds ratio for seropositivity was 2.51 for participants who had travelled to Ischgl (1.49–4.21, P = 0.001), 1.39 who had travelled to other federal states (1.00–1.93, P = 0.052), and 2.41 who had travelled abroad (1.61–3.63, P < 0.001). Compared to participants who had a suspected/confirmed SARS-CoV‑2 infection but were seronegative, seropositive participants more frequently reported loss of smell (odds ratio = 2.49, 1.32–4.68, P = 0.005) and taste (odds ratio = 2.76, 1.54–4.92, P = 0.001). Conclusion In summer 2020, SARS-CoV‑2 seroprevalence in Tyrolean blood donors was 3.1%. Our study revealed regional variation and associations with young age, travel history and specific symptoms.
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Affiliation(s)
- Anita Siller
- Central Institute for Blood Transfusion and Immunology, Tirol Kliniken GmbH, Anichstraße 35, 6020, Innsbruck, Austria
| | - Gregor A Wachter
- Central Institute for Blood Transfusion and Immunology, Tirol Kliniken GmbH, Anichstraße 35, 6020, Innsbruck, Austria
| | - Sabrina Neururer
- Department of Clinical Epidemiology, Tyrolean Federal Institute for Integrated Care, Tirol Kliniken GmbH, Innsbruck, Austria
| | - Bernhard Pfeifer
- Department of Clinical Epidemiology, Tyrolean Federal Institute for Integrated Care, Tirol Kliniken GmbH, Innsbruck, Austria.,Division for healthcare network and telehealth, UMIT-Private University for Health Sciences, Medical Informatics and Technology GmbH, Hall, Austria
| | - Manfred Astl
- Central Institute for Blood Transfusion and Immunology, Tirol Kliniken GmbH, Anichstraße 35, 6020, Innsbruck, Austria
| | - Wegene Borena
- Institute for Virology, Department for Hygiene, Microbiology and Public Health, Medical University of Innsbruck, Innsbruck, Austria
| | - Janine Kimpel
- Institute for Virology, Department for Hygiene, Microbiology and Public Health, Medical University of Innsbruck, Innsbruck, Austria
| | - Sebastian Elmer
- Central Institute for Blood Transfusion and Immunology, Tirol Kliniken GmbH, Anichstraße 35, 6020, Innsbruck, Austria
| | - Franziska Spöck
- Central Institute for Blood Transfusion and Immunology, Tirol Kliniken GmbH, Anichstraße 35, 6020, Innsbruck, Austria
| | - Anja Vales
- Central Institute for Blood Transfusion and Immunology, Tirol Kliniken GmbH, Anichstraße 35, 6020, Innsbruck, Austria
| | - Annelies Mühlbacher
- Central Institute for Blood Transfusion and Immunology, Tirol Kliniken GmbH, Anichstraße 35, 6020, Innsbruck, Austria
| | - Manfred Gaber
- Blood donor service Tyrol of the Austrian Red Cross, Rum, Austria
| | - Peter Willeit
- Clinical Epidemiology Team, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria. .,Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK.
| | - Harald Schennach
- Central Institute for Blood Transfusion and Immunology, Tirol Kliniken GmbH, Anichstraße 35, 6020, Innsbruck, Austria.
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Pipperger L, Riepler L, Kimpel J, Siller A, Stoitzner P, Bánki Z, von Laer D. Differential infection of murine and human dendritic cell subsets by oncolytic vesicular stomatitis virus variants. Oncoimmunology 2021; 10:1959140. [PMID: 34484872 PMCID: PMC8409795 DOI: 10.1080/2162402x.2021.1959140] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Oncolytic viruses (OVs) can eradicate tumor cells and elicit antitumor immunity. VSV-GP, a chimeric vesicular stomatitis virus (VSV) with the glycoprotein (GP) of the lymphocytic choriomeningitis virus, is a promising new OV candidate. However, the interaction of VSV-GP with host immune cells is not fully understood. Dendritic cells (DCs) are essential for inducing efficient antitumor immunity. Thus, we aimed to investigate the interaction of VSV-GP with different murine and human DCs subsets in direct comparison to the less cytopathic variant VSV-dM51-GP and wild type VSV. Immature murine bone marrow-derived DCs (BMDCs) were equally infected and killed by VSV and VSV-GP. Human monocyte-derived DCs (moDCs) were more permissive to VSV. Interestingly, VSV-dM51-GP induced maturation instead of killing in both BMDCs and moDCs as well as a pronounced release of pro-inflammatory cytokines. Importantly, matured BMDCs and moDCs were no longer susceptible to VSV-GP infection. Mouse splenic conventional DC type 1 (cDC1) could be infected ex vivo by VSV and VSV-GP to a higher extent than cDC2. Systemic infection of mice with VSV-GP and VSV-dM51-GP resulted in strong activation of cDCs despite low infection rates in spleen and tumor tissue. Human blood cDC1 were equally infected by VSV and VSV-GP, whereas cDC2 showed preferential infection with VSV. Our study demonstrated differential DC infection, activation, and cytokine production after the treatment with VSV and VSV-GP variants among species and subsets, which should be taken into account when investigating immunological mechanisms of oncolytic virotherapy in mouse models and human clinical trials.
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Affiliation(s)
- Lisa Pipperger
- Institute of Virology, Medical University of Innsbruck, Innsbruck, Austria
| | - Lydia Riepler
- Institute of Virology, Medical University of Innsbruck, Innsbruck, Austria
| | - Janine Kimpel
- Institute of Virology, Medical University of Innsbruck, Innsbruck, Austria
| | - Anita Siller
- Central Institute of Blood Transfusion and Immunology, University Hospital Innsbruck, Innsbruck, Austria
| | - Patrizia Stoitzner
- Department of Dermatology, Venereology & Allergology, Medical University of Innsbruck, Innsbruck, Austria
| | - Zoltán Bánki
- Institute of Virology, Medical University of Innsbruck, Innsbruck, Austria
| | - Dorothee von Laer
- Institute of Virology, Medical University of Innsbruck, Innsbruck, Austria
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Ortner NJ, Pinggera A, Hofer NT, Siller A, Brandt N, Raffeiner A, Vilusic K, Lang I, Blum K, Obermair GJ, Stefan E, Engel J, Striessnig J. RBP2 stabilizes slow Cav1.3 Ca 2+ channel inactivation properties of cochlear inner hair cells. Pflugers Arch 2019; 472:3-25. [PMID: 31848688 PMCID: PMC6960213 DOI: 10.1007/s00424-019-02338-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 10/18/2019] [Accepted: 12/04/2019] [Indexed: 01/31/2023]
Abstract
Cav1.3 L-type Ca2+ channels (LTCCs) in cochlear inner hair cells (IHCs) are essential for hearing as they convert sound-induced graded receptor potentials into tonic postsynaptic glutamate release. To enable fast and indefatigable presynaptic Ca2+ signaling, IHC Cav1.3 channels exhibit a negative activation voltage range and uniquely slow inactivation kinetics. Interaction with CaM-like Ca2+-binding proteins inhibits Ca2+-dependent inactivation, while the mechanisms underlying slow voltage-dependent inactivation (VDI) are not completely understood. Here we studied if the complex formation of Cav1.3 LTCCs with the presynaptic active zone proteins RIM2α and RIM-binding protein 2 (RBP2) can stabilize slow VDI. We detected both RIM2α and RBP isoforms in adult mouse IHCs, where they co-localized with Cav1.3 and synaptic ribbons. Using whole-cell patch-clamp recordings (tsA-201 cells), we assessed their effect on the VDI of the C-terminal full-length Cav1.3 (Cav1.3L) and a short splice variant (Cav1.342A) that lacks the C-terminal RBP2 interaction site. When co-expressed with the auxiliary β3 subunit, RIM2α alone (Cav1.342A) or RIM2α/RBP2 (Cav1.3L) reduced Cav1.3 VDI to a similar extent as observed in IHCs. Membrane-anchored β2 variants (β2a, β2e) that inhibit inactivation on their own allowed no further modulation of inactivation kinetics by RIM2α/RBP2. Moreover, association with RIM2α and/or RBP2 consolidated the negative Cav1.3 voltage operating range by shifting the channel's activation threshold toward more hyperpolarized potentials. Taken together, the association with "slow" β subunits (β2a, β2e) or presynaptic scaffolding proteins such as RIM2α and RBP2 stabilizes physiological gating properties of IHC Cav1.3 LTCCs in a splice variant-dependent manner ensuring proper IHC function.
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Affiliation(s)
- Nadine J Ortner
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck, Austria.
| | - Alexandra Pinggera
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck, Austria
| | - Nadja T Hofer
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck, Austria
| | - Anita Siller
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck, Austria
| | - Niels Brandt
- Department of Biophysics and CIPMM, Saarland University, Homburg, Germany
| | - Andrea Raffeiner
- Institute of Biochemistry, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck, Austria
| | - Kristina Vilusic
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck, Austria
| | - Isabelle Lang
- Department of Biophysics and CIPMM, Saarland University, Homburg, Germany
| | - Kerstin Blum
- Department of Biophysics and CIPMM, Saarland University, Homburg, Germany
| | - Gerald J Obermair
- Division of Physiology, Medical University Innsbruck, Innsbruck, Austria.,Division Physiology, Karl Landsteiner University of Health Sciences, Krems, Austria
| | - Eduard Stefan
- Institute of Biochemistry, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck, Austria
| | - Jutta Engel
- Department of Biophysics and CIPMM, Saarland University, Homburg, Germany
| | - Jörg Striessnig
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck, Austria.
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Borbolla JR, Nájera A, López-Hernández MA, González M, Siller A, Rubio B, Garcés O, Delgado JL, Collados MT. Correlation coefficients between several parameters and CD34+ cell yield in peripheral blood stem cell harvesting by apheresis. J Hematother Stem Cell Res 2001; 10:17-8. [PMID: 11276354 DOI: 10.1089/152581601750098138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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