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  1. Article: Role of procalcitonin use in the management of sepsis.

    Gregoriano, Claudia / Heilmann, Eva / Molitor, Alexandra / Schuetz, Philipp

    Journal of thoracic disease

    2020  Volume 12, Issue Suppl 1, Page(s) S5–S15

    Abstract: Important aspects of sepsis management include early diagnosis as well as timely and specific treatment in the first few hours of triage. However, diagnosis and differentiation from non-infectious causes often cause uncertainties and potential time ... ...

    Abstract Important aspects of sepsis management include early diagnosis as well as timely and specific treatment in the first few hours of triage. However, diagnosis and differentiation from non-infectious causes often cause uncertainties and potential time delays. Correct use of antibiotics still represents a major challenge, leading to increased risk for opportunistic infections, resistances to multiple antimicrobial agents and toxic side effects, which in turn increase mortality and healthcare costs. Optimized procedures for reliable diagnosis and management of antibiotic therapy has great potential to improve patient care. Herein, biomarkers have been shown to improve infection diagnosis, help in early risk stratification and provide prognostic information which helps optimizing therapeutic decisions ("antibiotic stewardship"). In this context, the use of the blood infection marker procalcitonin (PCT) has gained much attention. There is still no gold standard for the detection of sepsis and use of conventional diagnostic approaches are restricted by some limitations. Therefore, additional tests are necessary to enable early and reliable diagnosis. PCT has good discriminatory properties to differentiate between bacterial and viral inflammations with rapidly available results. Further, PCT adds to risk stratification and prognostication, which may influence appropriate use of health-care resources and therapeutic options. PCT kinetics over time also improves the monitoring of critically ill patients with sepsis and thus influences decisions regarding de-escalation of antibiotics. Most importantly, PCT helps in guiding antibiotic use in patients with respiratory infection and sepsis by limiting initiation and by shortening treatment duration. To date, PCT is the best studied biomarker regarding antibiotic stewardship. Still, further research is needed to understand optimal use of PCT, also in combination with other remerging diagnostic tests for most efficient sepsis care.
    Language English
    Publishing date 2020-02-28
    Publishing country China
    Document type Journal Article ; Review
    ZDB-ID 2573571-8
    ISSN 2077-6624 ; 2072-1439
    ISSN (online) 2077-6624
    ISSN 2072-1439
    DOI 10.21037/jtd.2019.11.63
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: The value of biomarker-guided antibiotic therapy.

    Haag, Ellen / Molitor, Alexandra / Gregoriano, Claudia / Müller, Beat / Schuetz, Philipp

    Expert review of molecular diagnostics

    2020  Volume 20, Issue 8, Page(s) 829–840

    Abstract: Introduction: There is an increasing interest to individualize patient management and decisions regarding antibiotic treatment. Biomarkers may provide relevant information for this purpose.: Areas covered: Despite a growing number of clinical trials ... ...

    Abstract Introduction: There is an increasing interest to individualize patient management and decisions regarding antibiotic treatment. Biomarkers may provide relevant information for this purpose.
    Areas covered: Despite a growing number of clinical trials investigating several biomarkers, there remain open questions regarding the best type of biomarker, timing or frequency of testing, and optimal cutoffs among others. The most promising results in regard to diagnosis of bacterial infection and therapy monitoring are found for procalcitonin (PCT), although some recent trials were not able to validate the promising earlier findings. Furthermore, less specific markers like C-reactive protein (CRP) and new prognostic biomarkers such as proadrenomedullin (MR-proADM) may improve the prognostic assessment of patients and proteomics may help shorten time to microbiological results. The aim of this review is to summarize the current concept of biomarker-guided management and provide an outlook of promising ongoing investigations.
    Expert opinion: 'Antibiotic stewardship' is complex and needs more than just the measurement of one single biomarker. However, when integrated into the context of a thorough clinical examination, standard blood parameters and a well done risk stratification by clinical scores such as the SOFA-score, biomarkers have great potential to improve the diagnostic and prognostic assessment of patients.
    MeSH term(s) Anti-Bacterial Agents/pharmacology ; Anti-Bacterial Agents/therapeutic use ; Bacterial Infections/diagnosis ; Bacterial Infections/drug therapy ; Bacterial Infections/microbiology ; Biomarkers ; C-Reactive Protein/metabolism ; Clinical Decision-Making ; Disease Management ; Humans ; Procalcitonin/blood ; Prognosis ; Proteomics/methods ; Treatment Outcome
    Chemical Substances Anti-Bacterial Agents ; Biomarkers ; Procalcitonin ; C-Reactive Protein (9007-41-4)
    Language English
    Publishing date 2020-06-27
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2112530-2
    ISSN 1744-8352 ; 1473-7159
    ISSN (online) 1744-8352
    ISSN 1473-7159
    DOI 10.1080/14737159.2020.1782193
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Does mid-regional pro-adrenomedullin (MR-proADM) improve the sequential organ failure assessment-score (SOFA score) for mortality-prediction in patients with acute infections? Results of a prospective observational study.

    Haag, Ellen / Gregoriano, Claudia / Molitor, Alexandra / Kloter, Milena / Kutz, Alexander / Mueller, Beat / Schuetz, Philipp

    Clinical chemistry and laboratory medicine

    2021  Volume 59, Issue 6, Page(s) 1165–1176

    Abstract: Objectives: Risk stratification in patients with infection is usually based on the Sequential Organ Failure Assessment-Score (SOFA score). Our aim was to investigate whether the vasoactive peptide mid-regional pro-adrenomedullin (MR-proADM) improves the ...

    Abstract Objectives: Risk stratification in patients with infection is usually based on the Sequential Organ Failure Assessment-Score (SOFA score). Our aim was to investigate whether the vasoactive peptide mid-regional pro-adrenomedullin (MR-proADM) improves the predictive value of the SOFA score for 30-day mortality in patients with acute infection presenting to the emergency department (ED).
    Methods: This secondary analysis of the prospective observational TRIAGE study included 657 patients with infection. The SOFA score, MR-proADM, and traditional inflammation markers were all measured at time of admission. Associations of admission parameters and 30-day mortality were investigated by measures of logistic regression, discrimination analyses, net reclassification index (NRI), and integrated discrimination index (IDI).
    Results: MR-proADM values were higher in non-survivors compared with survivors (4.5±3.5 nmol/L vs. 1.7 ± 1.8 nmol/L) with an adjusted odds ratio of 26.6 (95% CI 3.92 to 180.61, p=0.001) per 1 nmol/L increase in admission MR-proADM levels and an area under the receiver operator curve (AUC) of 0.86. While the SOFA score alone revealed an AUC of 0.81, adding MR-proADM further improved discrimination (AUC 0.87) and classification within predefined risk categories (NRI 0.075, p-value <0.05). An admission MR-proADM threshold of 1.75 nmol/L provided the best prognostic accuracy for 30-day mortality; with a sensitivity of 81% and a specificity of 75%, and a negative predictive value of 98%.
    Conclusions: MR-proADM improved the mortality risk stratification in patients with infection presenting to the ED beyond SOFA score alone and may further improve initial therapeutic site-of-care decisions.
    Trial registration: ClinicalTrials.gov NCT01768494. Registered January 15, 2013.
    MeSH term(s) Adrenomedullin ; Biomarkers ; Humans ; Infections ; Organ Dysfunction Scores ; Prognosis ; Prospective Studies ; Protein Precursors
    Chemical Substances Biomarkers ; Protein Precursors ; Adrenomedullin (148498-78-6)
    Language English
    Publishing date 2021-01-14
    Publishing country Germany
    Document type Journal Article ; Observational Study ; Research Support, Non-U.S. Gov't
    ZDB-ID 1418007-8
    ISSN 1437-4331 ; 1434-6621 ; 1437-8523
    ISSN (online) 1437-4331
    ISSN 1434-6621 ; 1437-8523
    DOI 10.1515/cclm-2020-1566
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Book ; Thesis: Piriformospora indica: Systemische Resistenz, Wachstumseffekte und Wechselwirkungen in der Wurzel

    Molitor, Alexandra

    molekularbiologische und morphologische Analysen der Interaktion des Endophyten mit Gerste (Hordeum vulgare) und Arabidopsis thaliana

    2009  

    Author's details vorgelegt von Alexandra Molitor
    Language German
    Size 173 S, Ill., graph. Darst
    Publishing place Giessen
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Univ., Diss.--Giessen, 2009
    Database Julius Kühn-Institute

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  5. Book ; Online ; Thesis: Piriformospora indica

    Molitor, Alexandra

    systemische Resistenz, Wachstumseffekte und Wechselwirkungen in der Wurzel ; molekularbiologische und morphologische Analysen der Interaktion des Endophyten mit Gerste (Hordeum vulgare) und Arabidopsis thaliana

    2009  

    Author's details vorgelegt von Alexandra Molitor
    Language German
    Size Online-Ressource
    Document type Book ; Online ; Thesis
    Thesis / German Habilitation thesis Univ., Diss.--Gießen, 2009
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  6. Book ; Online ; Thesis: Piriformospora indica

    Molitor, Alexandra [Verfasser]

    systemische Resistenz, Wachstumseffekte und Wechselwirkungen in der Wurzel ; molekularbiologische und morphologische Analysen der Interaktion des Endophyten mit Gerste (Hordeum vulgare) und Arabidopsis thaliana

    2009  

    Author's details vorgelegt von Alexandra Molitor
    Keywords Biowissenschaften, Biologie ; Life Science, Biology
    Subject code sg570
    Language German
    Document type Book ; Online ; Thesis
    Database Digital theses on the web

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  7. Article ; Online: Activation of Vasopressin System During COVID-19 is Associated With Adverse Clinical Outcomes: An Observational Study.

    Gregoriano, Claudia / Molitor, Alexandra / Haag, Ellen / Kutz, Alexander / Koch, Daniel / Haubitz, Sebastian / Conen, Anna / Bernasconi, Luca / Hammerer-Lercher, Angelika / Fux, Christoph A / Mueller, Beat / Schuetz, Philipp

    Journal of the Endocrine Society

    2021  Volume 5, Issue 6, Page(s) bvab045

    Abstract: Background: Activation of the vasopressin system plays a key role for the maintenance of osmotic, cardiovascular, and stress hormone homeostasis during disease. We investigated levels of copeptin, the C-terminal segment of the vasopressin prohormone, ... ...

    Abstract Background: Activation of the vasopressin system plays a key role for the maintenance of osmotic, cardiovascular, and stress hormone homeostasis during disease. We investigated levels of copeptin, the C-terminal segment of the vasopressin prohormone, that mirrors the production rate of vasopressin in patients infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).
    Methods: We measured levels of copeptin on admission and after days 3/4, 5/6, and 7/8 in 74 consecutive hospitalized adult COVID-19 patients and compared its prognostic accuracy to that of patients with community-acquired pneumonia (n = 876) and acute or chronic bronchitis (n = 371) from a previous study by means of logistic regression analysis. The primary endpoint was all-cause 30-day mortality.
    Results: Median admission copeptin levels in COVID-19 patients were almost 4-fold higher in nonsurvivors compared with survivors (49.4 pmol/L [iterquartile range (IQR) 24.9-68.9 pmol/L] vs 13.5 pmol/L [IQR 7.0-26.7 pmol/L]), resulting in an age- and gender-adjusted odds ratio of 7.0 (95% confidence interval [CI] 1.2-40.3),
    Conclusions: A pronounced activation of the vasopressin system in COVID-19 patients is associated with an adverse clinical course in COVID-19 patients. This finding, however, is not unique to COVID-19 but similar to other types of respiratory infections.
    Language English
    Publishing date 2021-03-17
    Publishing country United States
    Document type Journal Article
    ISSN 2472-1972
    ISSN (online) 2472-1972
    DOI 10.1210/jendso/bvab045
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Induced resistance triggered by Piriformospora indica.

    Molitor, Alexandra / Kogel, Karl-Heinz

    Plant signaling & behavior

    2009  Volume 4, Issue 3, Page(s) 215–216

    Language English
    Publishing date 2009-03-26
    Publishing country United States
    Document type Comment ; Journal Article
    ISSN 1559-2324
    ISSN (online) 1559-2324
    DOI 10.4161/psb.4.3.7814
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: The mycorrhiza fungus Piriformospora indica induces fast root-surface pH signaling and primes systemic alkalinization of the leaf apoplast upon powdery mildew infection.

    Felle, Hubert H / Waller, Frank / Molitor, Alexandra / Kogel, Karl-Heinz

    Molecular plant-microbe interactions : MPMI

    2009  Volume 22, Issue 9, Page(s) 1179–1185

    Abstract: We analyze here, by noninvasive electrophysiology, local and systemic plant responses in the interaction of barley (Hordeum vulgare L.) with the root-colonizing basidiomycete Piriformospora indica. In the short term (seconds, minutes), a constant flow of ...

    Abstract We analyze here, by noninvasive electrophysiology, local and systemic plant responses in the interaction of barley (Hordeum vulgare L.) with the root-colonizing basidiomycete Piriformospora indica. In the short term (seconds, minutes), a constant flow of P. indica chlamydospores along primary roots altered surface pH characteristics; whereas the root-hair zone transiently alkalized-a typical elicitor response-the elongation zone acidified, indicative of enhanced H(+) extrusion and plasma membrane H(+) ATPase stimulation. Eight to 10 min after treating roots with chlamydospores, the apoplastic pH of leaves began to acidify, which contrasts with observations of an alkalinization response to various stressors and microbe-associated molecular patterns (MAMPs). In the long term (days), plants with P. indica-colonized roots responded to inoculation with the leaf-pathogenic powdery mildew fungus Blumeria graminis f. sp. hordei with a leaf apoplastic pH increase of about 2, while the leaf apoplast of noncolonized barley responded to B. graminis f. sp. hordei merely with a pH increase of 0.8. The strong apoplastic pH response is reminiscent of B. graminis f. sp. hordei-triggered pH shifts in resistance gene-mediated resistant barley leaves or upon treatment with a chemical resistance inducer. In contrast, the MAMP N-acetylchito-octaose did not induce resistance to B. graminis f. sp. hordei and did not trigger the primed apoplastic pH shift. We speculate that the primed pH increase is indicative of and supports the potentiated systemic response to B. graminis f. sp. hordei-induced by P. indica in barley.
    MeSH term(s) Alkalies/metabolism ; Ascomycota/drug effects ; Ascomycota/physiology ; Basidiomycota/drug effects ; Basidiomycota/metabolism ; Colony Count, Microbial ; Hordeum/microbiology ; Hydrogen-Ion Concentration/drug effects ; Mycorrhizae/drug effects ; Mycorrhizae/physiology ; Plant Diseases/microbiology ; Plant Leaves/drug effects ; Plant Leaves/microbiology ; Signal Transduction/drug effects ; Spores, Fungal/drug effects ; Spores, Fungal/metabolism ; Surface Properties ; Time Factors ; gamma-Cyclodextrins/pharmacology
    Chemical Substances Alkalies ; gamma-Cyclodextrins
    Language English
    Publishing date 2009-09
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 743331-1
    ISSN 1943-7706 ; 0894-0282
    ISSN (online) 1943-7706
    ISSN 0894-0282
    DOI 10.1094/MPMI-22-9-1179
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: N-Acyl-Homoserine Lactone Confers Resistance toward Biotrophic and Hemibiotrophic Pathogens via Altered Activation of AtMPK6

    Schikora, Adam / Schenk, Sebastian T / Stein, Elke / Molitor, Alexandra / Zuccaro, Alga / Kogel, Karl-Heinz

    Plant physiology. 2011 Nov., v. 157, no. 3

    2011  

    Abstract: Pathogenic and symbiotic bacteria rely on quorum sensing to coordinate the collective behavior during the interactions with their eukaryotic hosts. Many Gram-negative bacteria use N-acyl-homoserine lactones (AHLs) as signals in such communication. Here ... ...

    Abstract Pathogenic and symbiotic bacteria rely on quorum sensing to coordinate the collective behavior during the interactions with their eukaryotic hosts. Many Gram-negative bacteria use N-acyl-homoserine lactones (AHLs) as signals in such communication. Here we show that plants have evolved means to perceive AHLs and that the length of acyl moiety and the functional group at the γ position specify the plant’s response. Root treatment with the N-3-oxo-tetradecanoyl-L-homoserine lactone (oxo-C14-HSL) reinforced the systemic resistance to the obligate biotrophic fungi Golovinomyces orontii in Arabidopsis (Arabidopsis thaliana) and Blumeria graminis f. sp. hordei in barley (Hordeum vulgare) plants. In addition, oxo-C14-HSL-treated Arabidopsis plants were more resistant toward the hemibiotrophic bacterial pathogen Pseudomonas syringae pv tomato DC3000. Oxo-C14-HSL promoted a stronger activation of mitogen-activated protein kinases AtMPK3 and AtMPK6 when challenged with flg22, followed by a higher expression of the defense-related transcription factors WRKY22 and WRKY29, as well as the PATHOGENESIS-RELATED1 gene. In contrast to wild-type Arabidopsis and mpk3 mutant, the mpk6 mutant is compromised in the AHL effect, suggesting that AtMPK6 is required for AHL-induced resistance. Results of this study show that AHLs commonly produced in the rhizosphere are crucial factors in plant pathology and could be an agronomic issue whose full impact has to be elucidated in future analyses.
    Keywords Arabidopsis thaliana ; Erysiphe graminis ; Gram-negative bacteria ; Hordeum vulgare ; Pseudomonas syringae pv. tomato ; barley ; fungi ; genes ; group behavior ; hosts ; lactones ; mutants ; pathogens ; plant pathology ; plant response ; protein kinases ; quorum sensing ; rhizosphere ; transcription factors
    Language English
    Dates of publication 2011-11
    Size p. 1407-1418.
    Publishing place American Society of Plant Biologists
    Document type Article
    ZDB-ID 208914-2
    ISSN 1532-2548 ; 0032-0889
    ISSN (online) 1532-2548
    ISSN 0032-0889
    Database NAL-Catalogue (AGRICOLA)

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