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  1. Book ; Thesis: Aktivierungsabhängige translationelle Regulation der Orai1-Expression in Thrombozyten

    Tolios, Alexander

    2013  

    Author's details vorgelegt von Alexander Tolios
    Language German
    Size 75 S. : Ill., graph. Darst.
    Publishing country Germany
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Tübingen, Univ., Diss., 2013
    HBZ-ID HT017730008
    Database Catalogue ZB MED Medicine, Health

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  2. Article: Systematic Analysis of the Transcriptome Profiles and Co-Expression Networks of Tumour Endothelial Cells Identifies Several Tumour-Associated Modules and Potential Therapeutic Targets in Hepatocellular Carcinoma.

    Mohr, Thomas / Katz, Sonja / Paulitschke, Verena / Aizarani, Nadim / Tolios, Alexander

    Cancers

    2021  Volume 13, Issue 8

    Abstract: Hepatocellular carcinoma (HCC) is the sixth most common cancer and the third most common cause of cancer-related death, with tumour associated liver endothelial cells being thought to be major drivers in HCC progression. This study aims to compare the ... ...

    Abstract Hepatocellular carcinoma (HCC) is the sixth most common cancer and the third most common cause of cancer-related death, with tumour associated liver endothelial cells being thought to be major drivers in HCC progression. This study aims to compare the gene expression profiles of tumour endothelial cells from the liver with endothelial cells from non-tumour liver tissue, to identify perturbed biologic functions, co-expression modules, and potentially drugable hub genes that could give rise to novel therapeutic targets and strategies. Gene Set Variation Analysis (GSVA) showed that cell growth-related pathways were upregulated, whereas apoptosis induction, immune and inflammatory-related pathways were downregulated in tumour endothelial cells. Weighted Gene Co-expression Network Analysis (WGCNA) identified several modules strongly associated to tumour endothelial cells or angiogenic activated endothelial cells with high endoglin (
    Language English
    Publishing date 2021-04-07
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527080-1
    ISSN 2072-6694
    ISSN 2072-6694
    DOI 10.3390/cancers13081768
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: The necessity of repeat testing for von Willebrand disease in adult patients with mild to moderate bleeding disorders.

    Mehic, Dino / Kraemmer, Daniel / Tolios, Alexander / Bücheler, Julia / Quehenberger, Peter / Haslacher, Helmuth / Ay, Cihan / Pabinger, Ingrid / Gebhart, Johanna

    Journal of thrombosis and haemostasis : JTH

    2023  Volume 22, Issue 1, Page(s) 101–111

    Abstract: Background: In patients with mild-to-moderate bleeding disorders (MBD), von Willebrand disease (VWD) is diagnosed at von Willebrand factor (VWF) levels ≤50 IU/dL. Although VWF levels are unstable, repeated testing for VWD diagnosis is not necessarily ... ...

    Abstract Background: In patients with mild-to-moderate bleeding disorders (MBD), von Willebrand disease (VWD) is diagnosed at von Willebrand factor (VWF) levels ≤50 IU/dL. Although VWF levels are unstable, repeated testing for VWD diagnosis is not necessarily advised in recent guidelines.
    Objectives: To analyze the relevance of repeated VWF testing to diagnose VWD in patients with MBD.
    Methods: Data of 277 patients with MBD from the Vienna Bleeding Biobank with at least 2 separate assessments of VWF antigen (VWF:Ag) and activity (VWF:Act) were analyzed.
    Results: In repeated VWF measurements, 36 patients (13.0%) had "changing" VWF levels (≤/>50 IU/dL), 27 (9.7%) had persistent levels ≤50 IU/dL ("pathologic"), and 214 (77.3%) had levels >50 IU/dL ("normal"). Of the 36 changing patients, 22 (61%) were diagnosed with VWD at baseline, whereas the others only met VWD diagnostic criteria at repeated measurements. Using logistic regression, we estimated a probability of change of 26.4% (95% CI, 12.5-47.4) at baseline VWF levels of 30 IU/dL, 50.8% (95% CI, 35.6-65.8) at 50 IU/dL, 18.8% (95% CI, 12.3-27.6) at 60 IU/dL, and 1.2% (95% CI, 0.3-4.9) at 80 IU/dL. Baseline VWF was a strong predictor for changing status (Χ
    Conclusion: Our data emphasize an overlap between patients with VWD and MBD with bleeding disorder of unknown cause and underline the need for repeated VWF testing, especially in patients with VWF levels <80 IU/dL.
    MeSH term(s) Adult ; Humans ; von Willebrand Diseases ; von Willebrand Factor ; Hemorrhage ; Blood Coagulation Tests ; Risk Factors
    Chemical Substances von Willebrand Factor
    Language English
    Publishing date 2023-09-21
    Publishing country England
    Document type Journal Article
    ZDB-ID 2112661-6
    ISSN 1538-7836 ; 1538-7933
    ISSN (online) 1538-7836
    ISSN 1538-7933
    DOI 10.1016/j.jtha.2023.09.010
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Assay validity of point-of-care platelet function tests in thrombocytopenic blood samples.

    Lacom, Conrad / Tolios, Alexander / Löffler, Markus W / Eichelberger, Beate / Quehenberger, Peter / Schaden, Eva / Wiegele, Marion

    Biochemia medica

    2022  Volume 32, Issue 2, Page(s) 20713

    Abstract: Introduction: Point-of-care (POC) platelet function tests are faster and easier to perform than in-depth assessment by flow cytometry. At low platelet counts, however, POC tests are prone to assess platelet function incorrectly. Lower limits of platelet ...

    Abstract Introduction: Point-of-care (POC) platelet function tests are faster and easier to perform than in-depth assessment by flow cytometry. At low platelet counts, however, POC tests are prone to assess platelet function incorrectly. Lower limits of platelet count required to obtain valid test results were defined and a testing method to facilitate comparability between different tests was established.
    Materials and methods: We assessed platelet function in whole blood samples of healthy volunteers at decreasing platelet counts (> 100, 80-100, 50-80, 30-50 and < 30 x10
    Results: The minimal platelet count required for reliable test results was 100 x10
    Conclusion: Calculating the ED
    MeSH term(s) Blood Platelets ; Flow Cytometry ; Humans ; Platelet Aggregation ; Platelet Count ; Platelet Function Tests/methods ; Point-of-Care Systems ; Thrombocytopenia
    Language English
    Publishing date 2022-07-05
    Publishing country Croatia
    Document type Journal Article
    ZDB-ID 1208725-7
    ISSN 1846-7482 ; 1330-0962
    ISSN (online) 1846-7482
    ISSN 1330-0962
    DOI 10.11613/BM.2022.020713
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: The assessment of platelet function by thromboelastometry as a point-of-care test to guide Intercept-treated platelet support in hemato-oncological patients and hematopoietic stem cell transplantation recipients.

    Leitner, Gerda C / Ho, Markus / Tolios, Alexander / Hopfinger, Georg / Rabitsch, Werner / Wohlfarth, Philipp

    Transfusion

    2020  Volume 60, Issue 7, Page(s) 1391–1399

    Abstract: Background: Pathogen inactivation (PI) techniques for platelet concentrates (PCs) are one of the latest innovations to improve blood safety and reduce the risk of transfusion-transmitted infections (TTIs). An impaired function and in vivo recovery of ... ...

    Abstract Background: Pathogen inactivation (PI) techniques for platelet concentrates (PCs) are one of the latest innovations to improve blood safety and reduce the risk of transfusion-transmitted infections (TTIs). An impaired function and in vivo recovery of platelets as well as an increased PC demand are concerns regarding these techniques. The intent of this study was to evaluate the hemostatic effect of PCs treated with the Intercept™ System by thromboelastometry (TEM) and to assess the clinical validity of its results in comparison to post-transfusion increase (PTI) and corrected count increment (CCI).
    Study-design and methods: This prospective-observational study included 47 patients (m:f = 25:22; median age: 54 years [21-70]) of our Bone Marrow Transplantation unit with hemato-oncological malignancies transfused with Intercept™-treated PCs. Serial TEM measurements were performed just before and 1 hour after PC transfusion and were analyzed for their correlation with PTI and CCI as well as for clinical variables.
    Results: The majority of our patients had received a hematopoietic stem cell transplantation (HSCT) (n = 41; 87%). In median 9 (1-50) PCs were transfused. Serial TEM, PTI, and CCI measurements were available for 150 transfusion episodes. The median platelet dose transfused was 2.65 × 10
    Conclusion: Serial TEM measurements indicate the hemostatic effect of Intercept™-treated PCs. The 1-hour PTI and CCI may not appropriately reflect the in vivo function of platelets after PI PC transfusion.
    MeSH term(s) Adult ; Aged ; Allografts ; Blood Platelets/metabolism ; Female ; Hematopoietic Stem Cell Transplantation ; Humans ; Male ; Middle Aged ; Neoplasms/blood ; Neoplasms/therapy ; Platelet Transfusion ; Point-of-Care Testing ; Prospective Studies ; Thrombelastography
    Language English
    Publishing date 2020-04-22
    Publishing country United States
    Document type Clinical Trial ; Journal Article ; Observational Study
    ZDB-ID 208417-x
    ISSN 1537-2995 ; 0041-1132
    ISSN (online) 1537-2995
    ISSN 0041-1132
    DOI 10.1111/trf.15783
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Potentials and pitfalls of ChatGPT and natural-language artificial intelligence models for the understanding of laboratory medicine test results. An assessment by the European Federation of Clinical Chemistry and Laboratory Medicine (EFLM) Working Group on Artificial Intelligence (WG-AI).

    Cadamuro, Janne / Cabitza, Federico / Debeljak, Zeljko / De Bruyne, Sander / Frans, Glynis / Perez, Salomon Martin / Ozdemir, Habib / Tolios, Alexander / Carobene, Anna / Padoan, Andrea

    Clinical chemistry and laboratory medicine

    2023  Volume 61, Issue 7, Page(s) 1158–1166

    Abstract: Objectives: ChatGPT, a tool based on natural language processing (NLP), is on everyone's mind, and several potential applications in healthcare have been already proposed. However, since the ability of this tool to interpret laboratory test results has ... ...

    Abstract Objectives: ChatGPT, a tool based on natural language processing (NLP), is on everyone's mind, and several potential applications in healthcare have been already proposed. However, since the ability of this tool to interpret laboratory test results has not yet been tested, the EFLM Working group on Artificial Intelligence (WG-AI) has set itself the task of closing this gap with a systematic approach.
    Methods: WG-AI members generated 10 simulated laboratory reports of common parameters, which were then passed to ChatGPT for interpretation, according to reference intervals (RI) and units, using an optimized prompt. The results were subsequently evaluated independently by all WG-AI members with respect to relevance, correctness, helpfulness and safety.
    Results: ChatGPT recognized all laboratory tests, it could detect if they deviated from the RI and gave a test-by-test as well as an overall interpretation. The interpretations were rather superficial, not always correct, and, only in some cases, judged coherently. The magnitude of the deviation from the RI seldom plays a role in the interpretation of laboratory tests, and artificial intelligence (AI) did not make any meaningful suggestion regarding follow-up diagnostics or further procedures in general.
    Conclusions: ChatGPT in its current form, being not specifically trained on medical data or laboratory data in particular, may only be considered a tool capable of interpreting a laboratory report on a test-by-test basis at best, but not on the interpretation of an overall diagnostic picture. Future generations of similar AIs with medical ground truth training data might surely revolutionize current processes in healthcare, despite this implementation is not ready yet.
    MeSH term(s) Humans ; Artificial Intelligence ; Chemistry, Clinical ; Laboratories
    Language English
    Publishing date 2023-04-24
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1418007-8
    ISSN 1437-4331 ; 1434-6621 ; 1437-8523
    ISSN (online) 1437-4331
    ISSN 1434-6621 ; 1437-8523
    DOI 10.1515/cclm-2023-0355
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: High Rate of Passenger Lymphocyte Syndrome after ABO Minor Incompatible Lung Transplantation.

    Kohl, Mirjam M / Schwarz, Stefan / Jaksch, Peter / Muraközy, Gabriella / Kurz, Martin / Schönbacher, Marlies / Tolios, Alexander / Frommlet, Florian / Hoetzenecker, Konrad / Körmöczi, Günther F

    American journal of respiratory and critical care medicine

    2023  Volume 209, Issue 8, Page(s) 995–1000

    Abstract: Rationale: ...

    Abstract Rationale:
    MeSH term(s) Humans ; Hemolysis ; Blood Group Incompatibility/complications ; Retrospective Studies ; Cohort Studies ; Prospective Studies ; Lymphocytes ; Lung Transplantation/adverse effects
    Language English
    Publishing date 2023-12-10
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1180953-x
    ISSN 1535-4970 ; 0003-0805 ; 1073-449X
    ISSN (online) 1535-4970
    ISSN 0003-0805 ; 1073-449X
    DOI 10.1164/rccm.202306-1107OC
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: A novel EGFR inhibitor acts as potent tool for hypoxia-activated prodrug systems and exerts strong synergistic activity with VEGFR inhibition in vitro and in vivo.

    Caban, Monika / Koblmueller, Bettina / Groza, Diana / Schueffl, Hemma H / Terenzi, Alessio / Tolios, Alexander / Mohr, Thomas / Mathuber, Marlene / Kryeziu, Kushtrim / Jaunecker, Carola / Pirker, Christine / Keppler, Bernhard K / Berger, Walter / Kowol, Christian R / Heffeter, Petra

    Cancer letters

    2023  Volume 565, Page(s) 216237

    Abstract: Small-molecule EGFR inhibitors have distinctly improved the overall survival especially in EGFR-mutated lung cancer. However, their use is often limited by severe adverse effects and rapid resistance development. To overcome these limitations, a hypoxia- ... ...

    Abstract Small-molecule EGFR inhibitors have distinctly improved the overall survival especially in EGFR-mutated lung cancer. However, their use is often limited by severe adverse effects and rapid resistance development. To overcome these limitations, a hypoxia-activatable Co(III)-based prodrug (KP2334) was recently synthesized releasing the new EGFR inhibitor KP2187 in a highly tumor-specific manner only in hypoxic areas of the tumor. However, the chemical modifications in KP2187 necessary for cobalt chelation could potentially interfere with its EGFR-binding ability. Consequently, in this study, the biological activity and EGFR inhibition potential of KP2187 was compared to clinically approved EGFR inhibitors. In general, the activity as well as EGFR binding (shown in docking studies) was very similar to erlotinib and gefitinib (while other EGFR-inhibitory drugs behaved different) indicating no interference of the chelating moiety with the EGFR binding. Moreover, KP2187 significantly inhibited cancer cell proliferation as well as EGFR pathway activation in vitro and in vivo. Finally, KP2187 proved to be highly synergistic with VEGFR inhibitors such as sunitinib. This indicates that KP2187-releasing hypoxia-activated prodrug systems are promising candidates to overcome the clinically observed enhanced toxicity of EGFR-VEGFR inhibitor combination therapies.
    MeSH term(s) Humans ; Prodrugs/pharmacology ; Prodrugs/therapeutic use ; ErbB Receptors/metabolism ; Protein Kinase Inhibitors/therapeutic use ; Erlotinib Hydrochloride/pharmacology ; Lung Neoplasms/metabolism ; Cell Proliferation ; Hypoxia/metabolism ; Cell Line, Tumor ; Antineoplastic Agents/therapeutic use
    Chemical Substances Prodrugs ; ErbB Receptors (EC 2.7.10.1) ; Protein Kinase Inhibitors ; Erlotinib Hydrochloride (DA87705X9K) ; Antineoplastic Agents ; EGFR protein, human (EC 2.7.10.1)
    Language English
    Publishing date 2023-05-19
    Publishing country Ireland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 195674-7
    ISSN 1872-7980 ; 0304-3835
    ISSN (online) 1872-7980
    ISSN 0304-3835
    DOI 10.1016/j.canlet.2023.216237
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Thrombomodulin in patients with mild to moderate bleeding tendency.

    Mehic, Dino / Tolios, Alexander / Hofer, Stefanie / Ay, Cihan / Haslacher, Helmuth / Downes, Kate / Haimel, Matthias / Pabinger, Ingrid / Gebhart, Johanna

    Haemophilia : the official journal of the World Federation of Hemophilia

    2021  Volume 27, Issue 6, Page(s) 1028–1036

    Abstract: Introduction: A massive increase of soluble thrombomodulin (sTM) due to variants in the thrombomodulin gene (THBD) has recently been identified as a novel bleeding disorder.: Aim: To investigate sTM levels and underlying genetic variants as a cause ... ...

    Abstract Introduction: A massive increase of soluble thrombomodulin (sTM) due to variants in the thrombomodulin gene (THBD) has recently been identified as a novel bleeding disorder.
    Aim: To investigate sTM levels and underlying genetic variants as a cause for haemostatic impairment and bleeding in a large number of patients with a mild to moderate bleeding disorder (MBD), including patients with bleeding of unknown cause (BUC).
    Patients and methods: In 507 MBD patients, sTM levels, thrombin generation and plasma clot formation were measured and compared to 90 age- and sex-matched healthy controls. In patients, genetic analysis of the THBD gene was performed.
    Results: No difference in sTM levels between patients and controls was found overall (median ([IQR] 5.0 [3.8-6.3] vs. 5.1 [3.7-6.4] ng/ml, p = .762), and according to specific diagnoses of MBD or BUC, and high sTM levels (≥95th percentile of healthy controls) were not overrepresented in patients. Soluble TM levels had no impact on bleeding severity or global tests of haemostasis, including thrombin generation or plasma clot formation. In the THBD gene, no known pathogenic or novel disease-causing variants affecting sTM plasma levels were identified in our patient cohort.
    Conclusion: TM-associated coagulopathy appears to be rare, as it was not identified in our large cohort of patients with MBD. Soluble TM did not arise as a risk factor for bleeding or altered haemostasis in these patients.
    MeSH term(s) Blood Coagulation Disorders ; Blood Coagulation Tests ; Hemorrhagic Disorders ; Humans ; Thrombin ; Thrombomodulin/genetics
    Chemical Substances Thrombomodulin ; Thrombin (EC 3.4.21.5)
    Language English
    Publishing date 2021-10-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 1229713-6
    ISSN 1365-2516 ; 1351-8216 ; 1355-0691
    ISSN (online) 1365-2516
    ISSN 1351-8216 ; 1355-0691
    DOI 10.1111/hae.14433
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Preanalytical Conditions and DNA Isolation Methods Affect Telomere Length Quantification in Whole Blood.

    Tolios, Alexander / Teupser, Daniel / Holdt, Lesca M

    PloS one

    2015  Volume 10, Issue 12, Page(s) e0143889

    Abstract: Telomeres are located at chromosome ends and their length (TL) has been associated with aging and human diseases such as cancer. Whole blood DNA is frequently used for TL measurements but the influence of preanalytical conditions and DNA isolation ... ...

    Abstract Telomeres are located at chromosome ends and their length (TL) has been associated with aging and human diseases such as cancer. Whole blood DNA is frequently used for TL measurements but the influence of preanalytical conditions and DNA isolation methods on TL quantification has not been thoroughly investigated. To evaluate potential preanalytical as well as methodological bias on TL, anonymized leftover EDTA-whole blood samples were pooled according to leukocyte counts and were incubated with and without actinomycin D to induce apoptosis as a prototype of sample degradation. DNA was isolated from fresh blood pools and after freezing at -80°C. Commercially available kits using beads (Invitrogen), spin columns (Qiagen, Macherey-Nagel and 5prime) or precipitation (Stratec/Invisorb) and a published isopropanol precipitation protocol (IPP) were used for DNA isolation. TL was assessed by qPCR, and normalized to the single copy reference gene 36B4 using two established single-plex and a new multiplex protocol. We show that the method of DNA isolation significantly affected TL (e.g. 1.86-fold longer TL when comparing IPP vs. Invitrogen). Sample degradation led to an average TL decrease of 22% when using all except for one DNA isolation method (5prime). Preanalytical storage conditions did not affect TL with exception of samples that were isolated with the 5prime kit, where a 27% increase in TL was observed after freezing. Finally, performance of the multiplex qPCR protocol was comparable to the single-plex assays, but showed superior time- and cost-effectiveness and required > 80% less DNA. Findings of the current study highlight the need for standardization of whole blood processing and DNA isolation in clinical study settings to avoid preanalytical bias of TL quantification and show that multiplex assays may improve TL/SCG measurements.
    MeSH term(s) DNA, Neoplasm/chemistry ; DNA, Neoplasm/genetics ; DNA, Neoplasm/isolation & purification ; Female ; Humans ; Male ; Neoplasms/chemistry ; Neoplasms/genetics ; Telomere/chemistry ; Telomere/genetics ; Telomere Homeostasis
    Chemical Substances DNA, Neoplasm
    Language English
    Publishing date 2015
    Publishing country United States
    Document type Journal Article
    ISSN 1932-6203
    ISSN (online) 1932-6203
    DOI 10.1371/journal.pone.0143889
    Database MEDical Literature Analysis and Retrieval System OnLINE

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