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Geinitz H, Silberberger E, Spiegl K, Feichtinger J, Wagner H, Hermann P, Bräutigam E, Track C, Weis EM, Venhoda C, Huppert R, Spindelbalker-Renner B, Zauner-Babor G, Nyiri DV, Karasek N, Erdei M, Gheju R, Gruber G, Egger M, Dieplinger B. SARS-CoV-2 vaccination willingness and humoral vaccination response in radiation oncology patients. Vaccine 2024; 42:945-959. [PMID: 38246842 DOI: 10.1016/j.vaccine.2024.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 11/27/2023] [Accepted: 01/02/2024] [Indexed: 01/23/2024]
Abstract
BACKGROUND SARS-CoV-2 infection has been and, in some parts, still is a threat to oncologic patients, making it crucial to understand perception of vaccination and immunologic responses in this vulnerable patient segment. SARS-CoV-2 vaccines in relation to malignant disease characteristics and therapies have so far not been studied consecutively in larger oncologic patient populations. This study captures SARS-CoV-2 vaccination willingness and humoral immune response in a large consecutive oncologic patient collective at the beginning of 2021. METHODS 1142 patients were consecutively recruited over 5.5 months at a tertiary department for radiation oncology and were assessed for vaccination willingness via a standardized interview. In already vaccinated patients total SARS-CoV-2 S antibody titres against the spike protein (Anti-SARS-CoV-2 S) and were evaluated 35 days or later after the first dose of SARS-CoV-2 vaccine. RESULTS Vaccination willingness was high with a rate of 90 %. The most frequent reasons for rejection were: undecided/potential vaccination after therapy, distrust in the vaccine and fear of interaction with comorbidities. Factors associated with lower vaccination willingness were: worse general condition, lower age and female sex. 80 % of the participants had been previously vaccinated, 8 % reported previous infection and 16 % received vaccination during antineoplastic therapy. In 97.5 % of the vaccinated patients Anti-SARS-CoV-2 S was detected. In a univariable analysis parameters associated with non-conversion were: lower performance status, spread to the local lymphatics (N + ), hematologic disease and diffuse metastases. All patients with oligometastatic disease achieved positive Anti-SARS-CoV-2 S titres. For patients with two vaccinations several risk factors were identified, that were associated with low antibody concentrations. CONCLUSIONS SARS-CoV-2 vaccination willingness among oncologic patients was high in the first months after its availability, and most patients had already received one or two doses. Over 97 % of vaccinated patients had measurable anti-SARS-CoV-2 S titres. Our data supports early identification of low humoral responders after vaccination and could facilitate the design of future oncologic vaccine trials (clinicaltrials.gov Identifier: NCT04918888).
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Affiliation(s)
- Hans Geinitz
- Department of Radiation Oncology, Ordensklinikum Linz GmbH, Barmherzige Schwestern, Seilerstätte 4, 4010 Linz, Austria; Johannes Kepler Universität Linz, Medizinische Fakultät, Krankenhausstraße 5, A-4020 Linz, Austria.
| | - Elisabeth Silberberger
- Department of Radiation Oncology, Ordensklinikum Linz GmbH, Barmherzige Schwestern, Seilerstätte 4, 4010 Linz, Austria
| | - Kurt Spiegl
- Department of Radiation Oncology, Ordensklinikum Linz GmbH, Barmherzige Schwestern, Seilerstätte 4, 4010 Linz, Austria
| | - Johann Feichtinger
- Department of Radiation Oncology, Ordensklinikum Linz GmbH, Barmherzige Schwestern, Seilerstätte 4, 4010 Linz, Austria
| | - Helga Wagner
- Kompetenzzentrum für Klinische Studien (KKS Linz) am Zentrum für Klinische Forschung (ZKF), Johannes Kepler Universität Linz, Medizinische Fakultät, Med Campus I, Gebäude ADM, 8.OG, Krankenhausstraße 5, A-4020 Linz, Austria
| | - Philipp Hermann
- Kompetenzzentrum für Klinische Studien (KKS Linz) am Zentrum für Klinische Forschung (ZKF), Johannes Kepler Universität Linz, Medizinische Fakultät, Med Campus I, Gebäude ADM, 8.OG, Krankenhausstraße 5, A-4020 Linz, Austria
| | - Elisabeth Bräutigam
- Department of Radiation Oncology, Ordensklinikum Linz GmbH, Barmherzige Schwestern, Seilerstätte 4, 4010 Linz, Austria
| | - Christine Track
- Department of Radiation Oncology, Ordensklinikum Linz GmbH, Barmherzige Schwestern, Seilerstätte 4, 4010 Linz, Austria
| | - Eva Maria Weis
- Department of Radiation Oncology, Ordensklinikum Linz GmbH, Barmherzige Schwestern, Seilerstätte 4, 4010 Linz, Austria
| | - Clemens Venhoda
- Department of Radiation Oncology, Ordensklinikum Linz GmbH, Barmherzige Schwestern, Seilerstätte 4, 4010 Linz, Austria
| | - Roswitha Huppert
- Department of Radiation Oncology, Ordensklinikum Linz GmbH, Barmherzige Schwestern, Seilerstätte 4, 4010 Linz, Austria
| | - Barbara Spindelbalker-Renner
- Department of Radiation Oncology, Ordensklinikum Linz GmbH, Barmherzige Schwestern, Seilerstätte 4, 4010 Linz, Austria
| | - Georgine Zauner-Babor
- Department of Radiation Oncology, Ordensklinikum Linz GmbH, Barmherzige Schwestern, Seilerstätte 4, 4010 Linz, Austria
| | - Dalma Viktoria Nyiri
- Department of Radiation Oncology, Ordensklinikum Linz GmbH, Barmherzige Schwestern, Seilerstätte 4, 4010 Linz, Austria
| | - Nicola Karasek
- Department of Radiation Oncology, Ordensklinikum Linz GmbH, Barmherzige Schwestern, Seilerstätte 4, 4010 Linz, Austria
| | - Mercedesz Erdei
- Department of Radiation Oncology, Ordensklinikum Linz GmbH, Barmherzige Schwestern, Seilerstätte 4, 4010 Linz, Austria
| | - Ruben Gheju
- Department of Radiation Oncology, Ordensklinikum Linz GmbH, Barmherzige Schwestern, Seilerstätte 4, 4010 Linz, Austria
| | - Georg Gruber
- Department of Radiation Oncology, Ordensklinikum Linz GmbH, Barmherzige Schwestern, Seilerstätte 4, 4010 Linz, Austria
| | - Margot Egger
- Department of Laboratory Medicine, Konventhospital Barmherzige Brueder Linz and Ordensklinikum Linz, Linz, Austria
| | - Benjamin Dieplinger
- Department of Laboratory Medicine, Konventhospital Barmherzige Brueder Linz and Ordensklinikum Linz, Linz, Austria
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Kiblboeck S, Oppelt P, Oppelt P, Stein R, Ommer S, Pavlik R, Rall K, Kongrtay K, Wagner H, Hermann P, Trautner PS. Can Classifications Adequately Represent Genital Malformations?: EVA Study ( E SHRE/ESGE | V CUAM | A FS) - A Prospective Multicenter Study to Evaluate the Current Female Genital Malformation Classifications. Geburtshilfe Frauenheilkd 2023; 83:827-834. [PMID: 37564897 PMCID: PMC10410643 DOI: 10.1055/a-2043-9982] [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: 11/10/2022] [Accepted: 02/20/2023] [Indexed: 03/31/2023] Open
Abstract
Introduction Genital malformations are a common clinical occurrence that can be represented using different classifications. Reproducibility is an essential quality characteristic for a classification, and it plays an important role, especially in consultations and the treatment of infertile patients and in obstetric management. The aim of this study is to demonstrate the reproducibility and clinical practicality of three commonly used classifications: the ESHRE/ESGE (European Society of Human Reproduction and Embryology/ European Society for Gynecological Endoscopy), VCUAM (Vagina Cervix Uterus Adnex-associated Malformation), and AFS (American Fertility Society) classifications. Materials and Methods Sixty-five patients with female genital malformations were included in this prospective, multicenter, exploratory, observational study. All participants underwent a clinical examination and a medical interview. The investigators were instructed to classify the presenting malformations according to the ESHRE/ESGE, VCUAM, and AFS classifications using a structured questionnaire. Investigators were asked whether the malformation could be reproducibly classified (yes/no) and about the grade (grade 1-5 from "very good" to "deficient") they would assign to each classification. Classification assessment was queried for vagina, cervix, uterus, adnexa, and associated malformations and was scored from 1 to 5. Results Reproducibility was rated as 80% (n = 52/65), 92.3% (n = 60/65), and 56.9% (n = 37/65) for the ESHRE/ESGE, VCUAM, and AFS classification, respectively. ESHRE/ESGE, VCUAM and AFS were rated as "very good" or "good" for 83.3%, 89.2%, and 10.8% of vaginal malformations; for 75.8%, 87.5%, and 24.2% of cervical malformations; and for 89.7%, 89.5%, and 86.2% of uterine malformations, respectively. VCUAM was rated as "very good" or "good" for 77.8% and 69.6% of adnexal malformations and associated malformations, respectively. ESHRE/ESGE and AFS were rated as "sufficient" or "deficient" for 100% and 75% of adnexal malformations and for 77.3% and 69.6% of associated malformations, respectively. Conclusion The prospective multicenter EVA ( E SHRE/ESGE | V CUAM | A FS) study revealed that the organ-based ESHRE/ESGE and VCUAM classifications of female genital malformations perform better in terms of reproducibility as well as in the assessment of individual compartments than the non-organ-based AFS classification.
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Affiliation(s)
- Stephanie Kiblboeck
- Department of Gynecology, Obstetrics and Gynecological Endocrinology, Kepler University Hospital Linz, Johannes Kepler Universität Linz, Linz, Austria
| | - Peter Oppelt
- Department of Gynecology, Obstetrics and Gynecological Endocrinology, Kepler University Hospital Linz, Johannes Kepler Universität Linz, Linz, Austria
| | - Patricia Oppelt
- Department of Gynecology, Erlangen University Hospital, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Raimund Stein
- Department of Pediatric, Adolescent and Reconstructive Urology, Medical Faculty Mannheim, University Medical Center Mannheim, Heidelberg University, Mannheim,
Germany
| | - Stefanie Ommer
- Department of Pediatric Surgery, University Hospital Jena, Jena, Germany
| | | | - Katharina Rall
- Department of Gynecology and Obstetrics, University Hospital Tübingen, Tübingen, Germany
| | - Kuralay Kongrtay
- Clinical Academic Department of Women’s Health, Corporate fund “University Medical Center”, Astana, Kazakhstan
| | - Helga Wagner
- Department of Applied Statistics, Johannes Kepler University Linz, Linz, Austria
- Center for Clinical Studies (CCS Linz), Johannes Kepler University Linz, Linz, Austria
| | - Philipp Hermann
- Center for Clinical Studies (CCS Linz), Johannes Kepler University Linz, Linz, Austria
| | - Philip Sebastian Trautner
- Department of Gynecology, Obstetrics and Gynecological Endocrinology, Kepler University Hospital Linz, Johannes Kepler Universität Linz, Linz, Austria
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Rubicz N, Poier-Fabian N, Paar C, Winkler-Zamani M, Hermann P, Raidl S, Zwittag PM. SARS-CoV-2 in the Middle Ear-CovEar: A Prospective Pilot Study. J Pers Med 2023; 13:905. [PMID: 37373894 DOI: 10.3390/jpm13060905] [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: 05/03/2023] [Revised: 05/25/2023] [Accepted: 05/26/2023] [Indexed: 06/29/2023] Open
Abstract
In post-mortem analyses, SARS-CoV-2 was found in the middle ear of some, but not all, patients with COVID-19. It is not clear whether SARS-CoV-2 penetrated the ear passively post mortem, or existed in the middle ear of living patients during, and perhaps also after, infection. This study investigated whether SARS-CoV-2 can be found in the middle ear of living patients during ear surgery. Swabs from the nasopharynx, the filter connected to the tracheal tube and secretions from the middle ear were collected during middle ear surgery. All samples were tested for the presence of SARS-CoV-2 using PCR. History of vaccination, COVID-19 history and contact with SARS-CoV-2-positive individuals were recorded preoperatively. Postoperative SARS-CoV-2 infection was noted at the follow-up visit. Overall, 63 participants (62%) were children and 39 (38%) were adults. SARS-CoV-2 was found in the middle ear and in the nasopharynx of two and four CovEar study participants, respectively. The filter connected to the tracheal tube was sterile in all cases. Cycle threshold (ct) values of the PCR test were between 25.94 and 37.06. SARS-CoV-2 penetrated the middle ear of living patients and was found in asymptomatic patients. The presence of SARS-CoV-2 in the middle ear may have implications for ear surgery and can pose a risk of infection for operating room staff. It may also directly affect the audio-vestibular system.
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Affiliation(s)
- Nina Rubicz
- Department of Otorhinolaryngology, Head and Neck Surgery, Kepler University Hospital GmbH, Krankenhausstrasse 9, 4020 Linz, Austria
- Medical Faculty, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz, Austria
| | - Nikolaus Poier-Fabian
- Department of Otorhinolaryngology, Head and Neck Surgery, Kepler University Hospital GmbH, Krankenhausstrasse 9, 4020 Linz, Austria
- Medical Faculty, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz, Austria
| | - Christian Paar
- Institute of Laboratory Medicine, Kepler University Hospital GmbH, Krankenhausstrasse 9, 4020 Linz, Austria
| | - Markus Winkler-Zamani
- Institute for Pathology and Microbiology, Kepler University Hospital GmbH, Krankenhausstrasse 9, 4020 Linz, Austria
| | - Philipp Hermann
- Center for Clinical Studies (CCS Linz), Johannes Kepler University Linz, Krankenhausstrasse 5, 4040 Linz, Austria
| | - Stefan Raidl
- Center for Clinical Studies (CCS Linz), Johannes Kepler University Linz, Krankenhausstrasse 5, 4040 Linz, Austria
| | - Paul Martin Zwittag
- Department of Otorhinolaryngology, Head and Neck Surgery, Kepler University Hospital GmbH, Krankenhausstrasse 9, 4020 Linz, Austria
- Medical Faculty, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz, Austria
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Aspalter S, Stefanits H, Maier CJ, Radl C, Wagner H, Hermann P, Aichholzer M, Stroh N, Gruber A, Senker W. Reduction of spondylolisthesis and restoration of lumbar lordosis after anterior lumbar interbody fusion (ALIF). BMC Surg 2023; 23:66. [PMID: 36973719 PMCID: PMC10045589 DOI: 10.1186/s12893-023-01966-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 03/20/2023] [Indexed: 03/29/2023] Open
Abstract
BACKGROUND Anterior lumbar interbody fusion (ALIF) is a well-established surgical treatment option for various diseases of the lumbar spine, including spondylolisthesis. This study aimed to evaluate the postoperative correction of spondylolisthesis and restoration of lumbar and segmental lordosis after ALIF. METHODS Patients with spondylolisthesis who underwent ALIF between 2013 and 2019 were retrospectively assessed. We assessed the following parameters pre-and postoperatively (6-months follow-up): Visual Analogue Scale (VAS) for pain, Oswestry Disability Index (ODI), lumbar lordosis (LL), segmental lordosis (SL), L4/S1 lordosis, and degree of spondylolisthesis. RESULTS 96 patients were included. In 84 cases (87.50%), additional dorsal instrumentation was performed. The most frequent diagnosis was isthmic spondylolisthesis (73.96%). VAS was reduced postoperatively, from 70 to 40, as was ODI (50% to 32%). LL increased from 59.15° to 64.45°, as did SL (18.95° to 28.55°) and L4/S1 lordosis (37.90° to 44.00°). Preoperative spondylolisthesis was 8.90 mm and was reduced to 6.05 mm postoperatively. Relative spondylolisthesis was 21.63% preoperatively and 13.71% postoperatively. All clinical and radiological improvements were significant (all p < 0.001). No significant difference considering the lordosis values nor spondylolisthesis was found between patients who underwent ALIF surgery without dorsal instrumentation and patients who received additional dorsal instrumentation. Venous laceration was the most frequent complication (10.42%). CONCLUSIONS With ALIF, good clinical results and safe and effective reduction of spondylolisthesis and restoration of lordosis can be achieved. Additional dorsal instrumentation does not significantly affect postoperative lordosis or spondylolisthesis. Individual vascular anatomy must be reviewed preoperatively before considering ALIF.
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Affiliation(s)
- Stefan Aspalter
- Department of Neurosurgery, Kepler University Hospital Linz, Johannes Kepler University, Linz, Austria
| | - Harald Stefanits
- Department of Neurosurgery, Kepler University Hospital Linz, Johannes Kepler University, Linz, Austria.
- Department of Neurosurgery, Neuromed Campus, Kepler University Hospital, Wagner-Jauregg Weg 15, Linz, 4020, Austria.
| | - Christoph Johannes Maier
- Department of Neurosurgery, Kepler University Hospital Linz, Johannes Kepler University, Linz, Austria
| | - Christian Radl
- Department of Neurosurgery, Kepler University Hospital Linz, Johannes Kepler University, Linz, Austria
| | - Helga Wagner
- Center for Clinical Studies (CCS Linz), Johannes Kepler University, Linz, Austria
- Department of Medical Statistics and Biometry, Institute of Applied Statistics, Johannes Kepler University, Linz, Austria
| | - Philipp Hermann
- Center for Clinical Studies (CCS Linz), Johannes Kepler University, Linz, Austria
| | - Martin Aichholzer
- Department of Neurosurgery, Kepler University Hospital Linz, Johannes Kepler University, Linz, Austria
| | - Nico Stroh
- Department of Neurosurgery, Kepler University Hospital Linz, Johannes Kepler University, Linz, Austria
| | - Andreas Gruber
- Department of Neurosurgery, Kepler University Hospital Linz, Johannes Kepler University, Linz, Austria
| | - Wolfgang Senker
- Department of Neurosurgery, Kepler University Hospital Linz, Johannes Kepler University, Linz, Austria
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Enzelsberger S, Oppelt P, Nirgianakis K, Seeber B, Drahoňovský J, Wanderer L, Krämer B, Grübling K, Kundu S, Salehin D, Mierzwinski M, Krentel H, Hermann P, Wagner H, Shebl O, Schäfer S. Preoperative application of the Enzian classification for endometriosis (The cEnzian Study): A prospective international multicenter study. BJOG 2022; 129:2052-2061. [PMID: 35596694 PMCID: PMC9796328 DOI: 10.1111/1471-0528.17235] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 12/17/2021] [Revised: 04/29/2022] [Accepted: 05/16/2022] [Indexed: 01/01/2023]
Abstract
OBJECTIVE To assess the diagnostic performance of preoperative application of the Enzian classification (cEnzian) using surgical findings as reference standard. DESIGN A prospective international non-interventional study. SETTING Twelve endometriosis centres in four European countries (Austria, Germany, Switzerland and Czech Republic). POPULATION 1062 women with endometriosis surgery. METHODS Extent of endometriosis was preoperatively classified using the cEnzian classification based on gynaecological examination and/or transvaginal ultrasound (TVS) and/or magnetic resonance imaging (MRI). After subsequent surgery, the surgeon classified the intraoperative findings using the Enzian classification. MAIN OUTCOME MEASURES Sensitivity, specificity, PPV, NPV, LR+ , LR- and accuracy were calculated. Conditional frequencies of intraoperative Enzian codings and the corresponding 95% confidence intervals were computed for each preoperative coding and visualised in plots. RESULTS Although overall consistency of cEnzian and Enzian was poor (35.14%, 95% confidence interval 32.26-38.03), high specificities and negative predictive values (NPVs) of the cEnzian compartments could be demonstrated. Looking at the individual parts of the Enzian classification, the poorest diagnostic performance was detected for compartment B and the highest PPVs were found for category 3 lesions (>3 cm), independent of the compartment. CONCLUSIONS Using the Enzian classification in a non-invasive setting is a useful tool providing us with an 'at a glance' summary of the diagnostic workup regarding deep endometriosis with high specificities and NPVs. An attempt to merge the two new endometriosis classification systems (#Enzian and AAGL 2021) seems reasonable taking into consideration the respective advantages of each other.
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Affiliation(s)
- Simon‐Hermann Enzelsberger
- Department of Gynecology, Obstetrics and Gynecological Endocrinology, Kepler University HospitalJohannes Kepler University LinzLinzAustria
| | - Peter Oppelt
- Department of Gynecology, Obstetrics and Gynecological Endocrinology, Kepler University HospitalJohannes Kepler University LinzLinzAustria
| | - Konstantinos Nirgianakis
- Department of Obstetrics and GynecologyUniversity Hospital and University of BernBernSwitzerland
| | - Beata Seeber
- Department of Gynecologic Endocrinology and Reproductive MedicineMedical University of InnsbruckInnsbruckAustria
| | - Jan Drahoňovský
- Institute for the Care of Mother and ChildPragueCzech Republic
| | - Leopold Wanderer
- Department of Gynecology and ObstetricsLandesklinikum MelkMelkAustria
| | - Bernhard Krämer
- Department of GynecologyUniversity Hospital TübingenTübingenGermany
| | | | - Sudip Kundu
- Department Gynaecology and ObstetricsHanover Medical SchoolHannoverGermany
| | - Darius Salehin
- Department of Gynecology and ObstetricsJohanniter Krankenhaus MönchengladbachMönchengladbachGermany
| | - Maciej Mierzwinski
- Department of Gynecology and ObstetricsSt.‐Johannes‐HospitalDortmundGermany
| | - Harald Krentel
- Department of Gynecology, Obstetrics and Gynecological OncologyBethesda Hospital, Academic Teaching HospitalDuisburgGermany
| | - Philipp Hermann
- Center for Clinical StudiesJohannes Kepler University LinzLinzAustria
| | - Helga Wagner
- Center for Clinical StudiesJohannes Kepler University LinzLinzAustria,Institute of Applied StatisticsJohannes Kepler University LinzLinzAustria
| | - Omar Shebl
- Department of Gynecology, Obstetrics and Gynecological Endocrinology, Kepler University HospitalJohannes Kepler University LinzLinzAustria
| | - Sebastian Schäfer
- Department of Gynecology and ObstetricsUniversity Hospital MünsterMünsterGermany
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Pospischil I, Reinhardt C, Bontems O, Salamin K, Fratti M, Blanchard G, Chang YT, Wagner H, Hermann P, Monod M, Hoetzenecker W, Guenova E. Identification of Dermatophyte and Non-Dermatophyte Agents in Onychomycosis by PCR and DNA Sequencing—A Retrospective Comparison of Diagnostic Tools. J Fungi (Basel) 2022; 8:jof8101019. [PMID: 36294584 PMCID: PMC9605175 DOI: 10.3390/jof8101019] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 09/14/2022] [Accepted: 09/21/2022] [Indexed: 12/02/2022] Open
Abstract
Rapid and reliable fungal identification is crucial to delineate infectious diseases, and to establish appropriate treatment for onychomycosis. Compared to conventional diagnostic methods, molecular techniques are faster and feature higher accuracy in fungal identification. However, in current clinical practice, molecular mycology is not widely available, and its practical applicability is still under discussion. This study summarizes the results of 16,094 consecutive nail specimens with clinical suspicion of onychomycosis. We performed PCR/sequencing on all primary nail specimens for which conventional mycological diagnostics remained inconclusive. In specimens with a positive direct microscopy but negative or contaminated culture, molecular mycology proved superior and specified a fungal agent in 65% (587/898). In 75% (443/587), the identified pathogen was a dermatophyte. Positive cultures for dermatophytes, yeasts and non-dermatophyte molds (NDMs) were concordant with primary-specimen-DNA PCR/sequencing in 83% (10/12), 34% (22/65) and 45% (76/169), respectively. Among NDMs, agreement was high for Fusarium spp. (32/40; 80%), but low for Penicillium spp. (5/25; 20%) and Alternaria spp. (1/20; 5%). This study underlines the improvement in diagnostic yield by fungal primary-specimen-DNA PCR/sequencing in the event of a negative or contaminated culture, as well as its significance for the diagnosis of dermatophyte and non-dermatophyte onychomycosis. Molecular mycology methods like PCR and DNA sequencing should complement conventional diagnostics in cases of equivocal findings, suspected NDM onychomycosis or treatment-resistant nail pathologies.
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Affiliation(s)
- Isabella Pospischil
- Department of Dermatology, Kepler University Hospital, Johannes Kepler University Linz, 4020 Linz, Austria
- Correspondence: (I.P.); (W.H.); (E.G.)
| | - Charlotte Reinhardt
- Department of Dermatology, Kepler University Hospital, Johannes Kepler University Linz, 4020 Linz, Austria
- Department of Dermatology, Lausanne University Hospital (CHUV) and the Faculty of Biology and Medicine, University of Lausanne, 1007 Lausanne, Switzerland
| | - Olympia Bontems
- Department of Dermatology, Lausanne University Hospital (CHUV) and the Faculty of Biology and Medicine, University of Lausanne, 1007 Lausanne, Switzerland
| | - Karine Salamin
- Department of Dermatology, Lausanne University Hospital (CHUV) and the Faculty of Biology and Medicine, University of Lausanne, 1007 Lausanne, Switzerland
| | - Marina Fratti
- Department of Dermatology, Lausanne University Hospital (CHUV) and the Faculty of Biology and Medicine, University of Lausanne, 1007 Lausanne, Switzerland
| | - Gabriela Blanchard
- Department of Dermatology, Lausanne University Hospital (CHUV) and the Faculty of Biology and Medicine, University of Lausanne, 1007 Lausanne, Switzerland
| | - Yun-Tsan Chang
- Department of Dermatology, Lausanne University Hospital (CHUV) and the Faculty of Biology and Medicine, University of Lausanne, 1007 Lausanne, Switzerland
| | - Helga Wagner
- Center for Clinical Studies (CCS Linz), Johannes Kepler University Linz, 4020 Linz, Austria
- Institute of Applied Statistics, Johannes Kepler University Linz, 4020 Linz, Austria
| | - Philipp Hermann
- Center for Clinical Studies (CCS Linz), Johannes Kepler University Linz, 4020 Linz, Austria
| | - Michel Monod
- Department of Dermatology, Lausanne University Hospital (CHUV) and the Faculty of Biology and Medicine, University of Lausanne, 1007 Lausanne, Switzerland
| | - Wolfram Hoetzenecker
- Department of Dermatology, Kepler University Hospital, Johannes Kepler University Linz, 4020 Linz, Austria
- Correspondence: (I.P.); (W.H.); (E.G.)
| | - Emmanuella Guenova
- Department of Dermatology, Lausanne University Hospital (CHUV) and the Faculty of Biology and Medicine, University of Lausanne, 1007 Lausanne, Switzerland
- Department of Dermatology, University Hospital Zurich and the University of Zurich, 8091 Zurich, Switzerland
- Department of Dermatology, Hospital 12 de Octubre, Medical School, University Complutense, 28040 Madrid, Spain
- Correspondence: (I.P.); (W.H.); (E.G.)
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7
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Enzelsberger SH, Oppelt P, Nirgianakis K, Seeber B, Drahoňovský J, Wanderer L, Krämer B, Grübling KN, Kundu S, Salehin D, Mierzwinski M, Krentel H, Hermann P, Wagner H, Shebl O, Schäfer S. Präoperative Anwendung der Enzian-Klassifikation für Endo metriose (cEnzian): Eine prospektive internationale Multicenter-Studie. Geburtshilfe Frauenheilkd 2022. [DOI: 10.1055/s-0042-1750221] [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: 10/17/2022] Open
Affiliation(s)
- S-H Enzelsberger
- Department of Gynecology, Obstetrics and Gynecological Endocrinology, Kepler University Hospital, Johannes Kepler University Linz, Linz, Austria
| | - P Oppelt
- Department of Gynecology, Obstetrics and Gynecological Endocrinology, Kepler University Hospital, Johannes Kepler University Linz, Linz, Austria
| | - K Nirgianakis
- Department of Obstetrics and Gynecology, University Hospital and University of Bern, Bern, Switzerland
| | - B Seeber
- Department of Gynecologic Endocrinology and Reproductive Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - J Drahoňovský
- Institute for the Care of Mother and Child, Prague, Czech Republic
| | - L Wanderer
- Department of Gynecology and Obstetrics, Landesklinikum Melk, Melk, Austria
| | - B Krämer
- Department of Gynecology, University Hospital Tübingen, Tübingen, Germany
| | - K N Grübling
- Department of Gynecology and Obstetrics, University Hospital Carl Gustav Carus, Dresden, Germany
| | - S Kundu
- Department Gynaecology and Obstetrics, Hanover Medical School, Hannover, Germany
| | - D Salehin
- Department of Gynecology and Obstetrics, Johanniter Krankenhaus Mönchengladbach, Mönchengladbach, Germany
| | - M Mierzwinski
- Department of Gynecology and Obstetrics, St.-Johannes-Hospital, Dortmund, Germany
| | - H Krentel
- Department of Gynecology, Obstetrics and Gynecological Oncology, Bethesda Hospital, Academic Teaching Hospital, Duisburg, Germany
| | - P Hermann
- Center for Clinical Studies, Johannes Kepler University Linz, Linz, Austria
| | - H Wagner
- Center for Clinical Studies, Johannes Kepler University Linz, Linz, Austria
- Institute of Applied Statistics, Johannes Kepler University Linz, Linz, Austria
| | - O Shebl
- Department of Gynecology, Obstetrics and Gynecological Endocrinology, Kepler University Hospital, Johannes Kepler University Linz, Linz, Austria
| | - S Schäfer
- Department of Gynecology and Obstetrics, University Hospital Münster, Münster, Germany
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8
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Pichler U, Schmidbauer E, Hermann P, Wagner H, Bolz M, Mursch‐Edlmayr AS. A comparative study of various prism adaptation forms in the surgical management of esophoria. Acta Ophthalmol 2022; 100:e1010-e1014. [PMID: 34431217 PMCID: PMC9291304 DOI: 10.1111/aos.15004] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 07/07/2021] [Accepted: 08/04/2021] [Indexed: 11/27/2022]
Abstract
PURPOSE To evaluate the outcome in participants who underwent surgery for esophoria following one of three different methods of preoperative prism adaptation test (PAT). METHODS This prospective, multicentre study was carried out at five eye departments from 2012 to 2019. 116 participants were included and allocated to three groups as per investigator choice: Group 1 (n = 55) had a short prism adaptation period ranging from 1 to 5 hours during their visit at the clinic. Group 2 (n = 36) underwent partial prism correction for at least 4 weeks before surgery. Group 3 (n = 25) underwent full prism correction for at least 4 weeks before surgery. Motoric success was determined by postoperative angle of deviation (AOD), and sensoric success was evaluated with Lang and Bagolini striated lens test. RESULTS A significant increase (p < 0.001) in AOD after PAT was observed in all groups, with no significant difference between groups (distance: p = 0.22; near: p = 0.31). Motoric and sensoric success was comparable between groups 3 months (p = 0.52; p = 0.55) and 1 year (p = 0.53; p = 0.29) after surgery. Prolonged prism adaptation (n = 24) for more than 365 days was not associated with better results. CONCLUSION Our study indicates that the postoperative result is independent from the duration and amount (partial or full correction) of prism adaptation before surgery at least up to one year of follow-up. Prolonged prism adaptation (>365 days) before surgery does not improve the results.
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Affiliation(s)
- Ulrike Pichler
- Department for Ophthalmology Kepler University Hospital Johannes Kepler University Linz Austria
| | - Elke Schmidbauer
- Department for Ophthalmology Kepler University Hospital Johannes Kepler University Linz Austria
| | - Philipp Hermann
- Center for Clinical Studies (CCS Linz) Johannes Kepler University Linz Austria
| | - Helga Wagner
- Center for Clinical Studies (CCS Linz) Johannes Kepler University Linz Austria
- Institute of Applied Statistics Johannes Kepler University Austria
| | - Matthias Bolz
- Department for Ophthalmology Kepler University Hospital Johannes Kepler University Linz Austria
- Johannes Kepler University Linz Austria
| | - Anna Sophie Mursch‐Edlmayr
- Department for Ophthalmology Kepler University Hospital Johannes Kepler University Linz Austria
- Johannes Kepler University Linz Austria
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9
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Senker W, Aspalter S, Radl C, Pichler J, Doppler S, Weis S, Webersinke C, Wagner H, Hermann P, Aichholzer M, Aufschnaiter-Hießböck K, Thomae W, Stroh N, Hauser T, Gruber A. Frequency and characteristics of bacterial and viral low-grade infections of the intervertebral discs: a prospective, observational study. J Orthop Traumatol 2022; 23:15. [PMID: 35303173 PMCID: PMC8933588 DOI: 10.1186/s10195-022-00633-y] [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] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 02/26/2022] [Indexed: 12/03/2022] Open
Abstract
Study design Monocentric, prospective, observational study. Objective The clinical relevance of bacterial colonization of intervertebral discs is controversial. This study aimed to determine a possible relationship between bacterial and viral colonization and low-grade infection of the discs. Methods We investigated 447 disc samples from 392 patients. Microbiological culture was used to examine the samples for bacterial growth, polymerase chain reaction (PCR) was used for detection of herpes simplex virus types 1 and 2 (HSV-1, HSV-2) and Cytomegalovirus (CMV), and histopathological analysis was used to detect signs of inflammation. The results were compared between subgroups organized according to gender, age, location of the samples, surgical approach, preoperative C-reactive protein (CRP), preoperative and 6 months postoperative Oswestry Disability Index (ODI) and Neck Disability Index (NDI), and Modic changes (MC) of the corresponding endplates. Also, we assessed the occurrence of postoperative infections within 6 months. Results Microbiological culture was positive in 38.78% of the analyzed intervertebral discs. Altogether, 180 bacteria were isolated. Coagulase-negative staphylococci (CONS) (23.41%) and Cutibacterium acnes (18.05%) were the most frequently detected microorganisms. None of HSV-1, HSV-2, or CMV were detected. Male patients (p = 0.00036) and cervical segments (p = 0.00001) showed higher rates of positive culture results. Ventral surgical approaches ( p < 0.001) and Type 2 MC (p = 0.0127) were significantly associated with a positive microbiological result ( p< 0.001). Neither pre- nor postoperative ODI and NDI are associated with positive culture results. In 4 (1.02%) patients, postoperative spondylodiscitis occurred. Conclusions With 447 segments from 392 patients, we present one of the largest studies to date. While disc degeneration caused by HSV-1, HSV-2, and CMV seems unlikely, we found positive microbiological culture results in 38.78% of all discs. The role of local skin flora and sample contamination should be the focus of further investigations. Level of Evidence III. Trial registration: The study was registered at ClinicalTrials.gov (ID: NCT04712487, https://www.clinicaltrials.gov/ct2/show/study/NCT04712487). Supplementary Information The online version contains supplementary material available at 10.1186/s10195-022-00633-y.
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Affiliation(s)
- Wolfgang Senker
- Department of Neurosurgery, Kepler University Hospital, Johannes Kepler University, Wagner-Jauregg Weg 15, 4020, Linz, Austria
| | - Stefan Aspalter
- Department of Neurosurgery, Kepler University Hospital, Johannes Kepler University, Wagner-Jauregg Weg 15, 4020, Linz, Austria.
| | - Christian Radl
- Department of Neurosurgery, Kepler University Hospital, Johannes Kepler University, Wagner-Jauregg Weg 15, 4020, Linz, Austria
| | - Josef Pichler
- Department of Internal Medicine, Kepler University Hospital, Johannes Kepler University, Wagner-Jauregg Weg 15, 4020, Linz, Austria
| | - Stefan Doppler
- Institute of Pathology and Microbiology, Kepler University Hospital, Johannes Kepler University, Krankenhausstraße 9, 4021, Linz, Austria
| | - Serge Weis
- Institute of Pathology and Neuropathology, Kepler University Hospital, Johannes Kepler University, Wagner-Jauregg Weg 15, 4020, Linz, Austria
| | - Christine Webersinke
- Institute of Pathology and Neuropathology, Kepler University Hospital, Johannes Kepler University, Wagner-Jauregg Weg 15, 4020, Linz, Austria
| | - Helga Wagner
- Center for Clinical Studies (CCS Linz), Johannes Kepler University, Huemerstrasse 3-5, 4020, Linz, Austria.,Department of Medical Statistics and Biometry, Institute of Applied Statistics, Johannes Kepler University, Altenberger Strasse 69, 4040, Linz, Austria
| | - Philipp Hermann
- Center for Clinical Studies (CCS Linz), Johannes Kepler University, Huemerstrasse 3-5, 4020, Linz, Austria
| | - Martin Aichholzer
- Department of Neurosurgery, Kepler University Hospital, Johannes Kepler University, Wagner-Jauregg Weg 15, 4020, Linz, Austria
| | - Kathrin Aufschnaiter-Hießböck
- Department of Neurosurgery, Kepler University Hospital, Johannes Kepler University, Wagner-Jauregg Weg 15, 4020, Linz, Austria
| | - Wolfgang Thomae
- Department of Neurosurgery, Kepler University Hospital, Johannes Kepler University, Wagner-Jauregg Weg 15, 4020, Linz, Austria
| | - Nico Stroh
- Department of Neurosurgery, Kepler University Hospital, Johannes Kepler University, Wagner-Jauregg Weg 15, 4020, Linz, Austria
| | - Thomas Hauser
- Department of Neurosurgery, Kepler University Hospital, Johannes Kepler University, Wagner-Jauregg Weg 15, 4020, Linz, Austria
| | - Andreas Gruber
- Department of Neurosurgery, Kepler University Hospital, Johannes Kepler University, Wagner-Jauregg Weg 15, 4020, Linz, Austria
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10
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Enzelsberger SH, Wetzlmair D, Hermann P, Wagner H, Shebl O, Oppelt P, Trautner PS. Bleeding pattern after medical management of early pregnancy loss with mifepristone–misoprostol and its prognostic value: a prospective observational cohort study. Arch Gynecol Obstet 2021; 306:349-355. [PMID: 34694431 PMCID: PMC9349076 DOI: 10.1007/s00404-021-06291-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 10/13/2021] [Indexed: 10/26/2022]
Abstract
Abstract
Purpose
To improve counseling of women by reporting bleeding characteristics at home after medical management of an early pregnancy loss (EPL) with mifepristone and misoprostol, and to evaluate occurring bleeding patterns as a prognostic tool.
Methods
This prospective two-center observational cohort study enrolled 197 women who presented with an EPL (embryonic or anembryonic miscarriage) from December 2017 to April 2019 and chose a home-based medical management with 200 mg mifepristone and 800 mcg misoprostol. From the day of mifepristone intake, the strength of vaginal bleeding was recorded daily for 2 weeks by the patient herself using a diary sheet. Treatment success was defined as no histologically confirmed retained products of conception (RPOC) within 3 months. After considering all drop-out criteria, 154 women were included in the analysis.
Results
40.0% of patients (95% CI 30.4–49.6) already reported bleeding onset in the time period between the intake of mifepristone and misoprostol. The median duration of vaginal bleeding including spotting was 13 days. The chance of RPOC was about sixfold (OR 6.06, 95% CI 2.15–17.10) in the group of persistent bleeding after 2 weeks compared to the group with a terminated bleeding at that time. Exploratory regression analysis indicated association of higher serum levels of leukocytes at treatment start with RPOC (p = 0.013).
Conclusions
Terminated bleeding after 2 weeks is a useful indicator for successful medical induction of EPL. Women undergoing medical treatment with mifepristone must be informed about the high frequency of bleeding onset before misoprostol intake.
Clinical trial registration
DRKS—German Clinical Trials Register, ID: DRKS00013515, registration date 05.12.2017. http://www.drks.de/DRKS00013515.
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11
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Joós-Kovács G, Vecsei B, Körmendi S, Gyarmathy VA, Borbély J, Hermann P. Trueness of CAD/CAM digitization with a desktop scanner - an in vitro study. BMC Oral Health 2019; 19:280. [PMID: 31830970 PMCID: PMC6909471 DOI: 10.1186/s12903-019-0976-1] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 11/28/2019] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Desktop scanners are devices for digitization of conventional impressions or gypsum casts by indirect Computer-Aided Design/Computer-Assisted Manufacturing (CAD/CAM) in dentistry. The purpose of this in vitro study was: 1, to investigate whether virtual models produced by the extraoral scanner have the same trueness as sectioned casts; and 2, to assess if digitization with an extraoral scanner influences the surface information. METHODS A polimethyl-methacrilic acid (PMMA) cast and a reference scanner (TwoCam 3D, SCAN technology A/S, Ringsted, Denmark; field of view 200 mm, resolution 0.1 mm ± 0.025 mm) were used to create the reference data in standard tessellation format (STL). According to the extraoral CAD/CAM digitization steps, impressions, mastercasts, and sectioned casts were made, and STL files were generated with the reference scanner. The pivotal point of the study was to digitalize these sectioned casts with the extraoral scanner (Straumann CARES Scan CS2 Visual 8.0 software, InstitutStraumann AG, Basel, Switzerland) and STL files were exported. Virtual caliper measurements were performed. Absolute deviations were compared using multilevel mixed-effects linear regression. Relative distortions were calculated with mean absolute errors and reference values. RESULTS Differences were observed in measurements of tooth sizes. All four prepared teeth were affected. No relationship was observed in relative deviations. Absolute differences between all the indirect digitization steps considering arch distances were: impressions, - 0.004 mm; mastercasts, 0.136 mm; sectioned casts, - 0.028 mm; and extraoral scanner, - 0.089 mm. Prepared dies on the virtual casts (extraoral scanner) were closer to each other than those on the sectioned gypsum casts. Relative deviation calculations revealed no relationship with the position of the dies in the arch. CONCLUSION The trueness of the virtual models generated by the extraoral scanner system used in this study was different from the dimensions of the sectioned casts. The digitization of gypsum casts changes both the dimensions of dies and the distances between the dies. The virtual casts had smaller distances than any distances measured at previous steps. Either bigger dies or longer distances did not result in greater distortions. We cannot, however, generalize our results to all scanners available on the market, because they might give different results.
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Affiliation(s)
- G. Joós-Kovács
- Department of Prosthodontics, Semmelweis University, Szentkirályi u. 47, Budapest, 1088 Hungary
| | - B. Vecsei
- Department of Prosthodontics, Semmelweis University, Szentkirályi u. 47, Budapest, 1088 Hungary
| | - Sz. Körmendi
- Department of Prosthodontics, Semmelweis University, Szentkirályi u. 47, Budapest, 1088 Hungary
| | - V. A. Gyarmathy
- EpiConsult LLC, 8 The Green, STE A, Dover, DE 19901 USA
- Johns Hopkins Bloomberg School of Public Health, Baltimore, MD USA
| | - J. Borbély
- Department of Prosthodontics, Semmelweis University, Szentkirályi u. 47, Budapest, 1088 Hungary
| | - P. Hermann
- Department of Prosthodontics, Semmelweis University, Szentkirályi u. 47, Budapest, 1088 Hungary
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12
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Mantalos P, Karagrigoriou A, Střelec L, Jordanova P, Hermann P, Kiseľák J, Hudák J, Stehlík M. On improved volatility modelling by fitting skewness in ARCH models. J Appl Stat 2019; 47:1031-1063. [DOI: 10.1080/02664763.2019.1671323] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- P. Mantalos
- Department of Economics and Statistics, Linnaeus University, Vaxjo, Sweden
| | - A. Karagrigoriou
- Department of Statistics & Actuarial Financial Mathematics, University of the Aegean, Samos, Greece
| | - L. Střelec
- Department of Statistics and Operation Analysis, Mendel University, Brno, Czech Republic
| | - P. Jordanova
- Faculty of Mathematics and Informatics, Shumen University, Shumen, Bulgaria
| | - P. Hermann
- Department of Applied Statistics, Johannes Kepler University, Linz, Austria
| | - J. Kiseľák
- Department of Applied Statistics, Johannes Kepler University, Linz, Austria
- LIT – Linz Institute of Technology, Johannes Kepler University, Linz, Austria
- Institute of Mathematics, Faculty of Science, P. J. Šafárik University in Košice, Kosice, Slovakia
| | - J. Hudák
- Institute of Mathematics, Faculty of Science, P. J. Šafárik University in Košice, Kosice, Slovakia
| | - M. Stehlík
- Department of Applied Statistics, Johannes Kepler University, Linz, Austria
- LIT – Linz Institute of Technology, Johannes Kepler University, Linz, Austria
- Department of Statistics, University of Valparaíso, Valparaíso, Chile
- Statistics & Actuarial Science Department, The University of Iowa, IA, USA
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13
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Llorens F, Villar-Piqué A, Schmitz M, Diaz-Lucena D, Wohlhage M, Hermann P, Goebel S, Schmidt I, Glatzel M, Hauw JJ, Sikorska B, Liberski PP, Riggert J, Ferrer I, Zerr I. Plasma total prion protein as a potential biomarker for neurodegenerative dementia: diagnostic accuracy in the spectrum of prion diseases. Neuropathol Appl Neurobiol 2019; 46:240-254. [PMID: 31216593 DOI: 10.1111/nan.12573] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [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: 02/13/2019] [Accepted: 06/12/2019] [Indexed: 12/11/2022]
Abstract
AIMS In the search for blood-based biomarkers of neurodegenerative diseases, we characterized the concentration of total prion protein (t-PrP) in the plasma of neurodegenerative dementias. We aimed to assess its accuracy in this differential diagnostic context. METHODS Plasma t-PrP was measured in 520 individuals including healthy controls (HC) and patients diagnosed with neurological disease control (ND), Alzheimer's disease (AD), sporadic Creutzfeldt-Jakob disease (sCJD), frontotemporal dementia (FTD), Lewy body dementia (LBD) and vascular dementia (VaD). Additionally, t-PrP was quantified in genetic prion diseases and iatrogenic CJD. The accuracy of t-PrP discriminating the diagnostic groups was evaluated and correlated with demographic, genetic and clinical data in prion diseases. Markers of blood-brain barrier impairment were investigated in sCJD brains. RESULTS Compared to HC and ND, elevated plasma t-PrP concentrations were detected in sCJD, followed by FTD, AD, VaD and LBD. In sCJD, t-PrP was associated neither with age nor sex, but with codon 129 PRNP genotype. Plasma t-PrP concentrations correlated with cerebrospinal fluid (CSF) markers of neuro-axonal damage, but not with CSF t-PrP. In genetic prion diseases, plasma t-PrP was elevated in all type of mutations investigated. In sCJD brain tissue, extravasation of immunoglobulin G and the presence of swollen astrocytic end-feet around the vessels suggested leakage of blood-brain barrier as a potential source of increased plasma t-PrP. CONCLUSIONS Plasma t-PrP is elevated in prion diseases regardless of aetiology. This pilot study opens the possibility to consider plasma t-PrP as a promising blood-based biomarker in the diagnostic of prion disease.
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Affiliation(s)
- F Llorens
- Network Center for Biomedical Research in Neurodegenerative Diseases, (CIBERNED), Institute Carlos III, Ministry of Health, Hospitalet de Llobregat, Spain.,Bellvitge Biomedical Research Institute (IDIBELL), Hospitalet de Llobregat, Spain.,Department of Neurology, University Medical School, Göttingen, Germany
| | - A Villar-Piqué
- Department of Neurology, University Medical School, Göttingen, Germany
| | - M Schmitz
- Department of Neurology, University Medical School, Göttingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| | - D Diaz-Lucena
- Network Center for Biomedical Research in Neurodegenerative Diseases, (CIBERNED), Institute Carlos III, Ministry of Health, Hospitalet de Llobregat, Spain
| | - M Wohlhage
- Department of Neurology, University Medical School, Göttingen, Germany
| | - P Hermann
- Department of Neurology, University Medical School, Göttingen, Germany
| | - S Goebel
- Department of Neurology, University Medical School, Göttingen, Germany
| | - I Schmidt
- Department of Neurology, University Medical School, Göttingen, Germany
| | - M Glatzel
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - J-J Hauw
- Centre national de référence des ATNC, Paris, France
| | - B Sikorska
- Department of Molecular Pathology and Neuropathology, Medical University of Lodz, Lodz, Poland
| | - P P Liberski
- Department of Molecular Pathology and Neuropathology, Medical University of Lodz, Lodz, Poland
| | - J Riggert
- Department of Transfusion Medicine, University Medical School, Göttingen, Germany
| | - I Ferrer
- Network Center for Biomedical Research in Neurodegenerative Diseases, (CIBERNED), Institute Carlos III, Ministry of Health, Hospitalet de Llobregat, Spain.,Bellvitge Biomedical Research Institute (IDIBELL), Hospitalet de Llobregat, Spain.,Department of Pathology and Experimental Therapeutics, Faculty of Medicine, University of Barcelona, Barcelona, Spain
| | - I Zerr
- Department of Neurology, University Medical School, Göttingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
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14
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Schwarz T, Striedner Y, Horner A, Haase K, Kemptner J, Zeppezauer N, Hermann P, Tiemann-Boege I. PRDM9 forms a trimer by interactions within the zinc finger array. Life Sci Alliance 2019; 2:2/4/e201800291. [PMID: 31308055 PMCID: PMC6643046 DOI: 10.26508/lsa.201800291] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 07/02/2019] [Accepted: 07/03/2019] [Indexed: 11/24/2022] Open
Abstract
PRDM9 forms a trimer as a soluble protein and in complex with DNA mediated by the ZnF domain. Five ZnFs are already sufficient for multimerization and only one DNA molecule is complexed in the trimer. PRDM9 is a trans-acting factor directing meiotic recombination to specific DNA-binding sites by its zinc finger (ZnF) array. It was suggested that PRDM9 is a multimer; however, we do not know the stoichiometry or the components inducing PRDM9 multimerization. In this work, we used in vitro binding studies and characterized with electrophoretic mobility shift assays, mass spectrometry, and fluorescence correlation spectroscopy the stoichiometry of the PRDM9 multimer of two different murine PRDM9 alleles carrying different tags and domains produced with different expression systems. Based on the migration distance of the PRDM9–DNA complex, we show that PRDM9 forms a trimer. Moreover, this stoichiometry is adapted already by the free, soluble protein with little exchange between protein monomers. The variable ZnF array of PRDM9 is sufficient for multimerization, and at least five ZnFs form already a functional trimer. Finally, we also show that only one ZnF array within the PRDM9 oligomer binds to the DNA, whereas the remaining two ZnF arrays likely maintain the trimer by ZnF–ZnF interactions.
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Affiliation(s)
- Theresa Schwarz
- Institute of Biophysics, Johannes Kepler University, Linz, Austria
| | - Yasmin Striedner
- Institute of Biophysics, Johannes Kepler University, Linz, Austria
| | - Andreas Horner
- Institute of Biophysics, Johannes Kepler University, Linz, Austria
| | - Karin Haase
- Institute of Biophysics, Johannes Kepler University, Linz, Austria
| | - Jasmin Kemptner
- Red Cross Blood Transfusion Center Upper Austria, MedCampus II, Johannes Kepler University, Linz, Austria
| | | | - Philipp Hermann
- Institute of Applied Statistics, Johannes Kepler University, Linz, Austria
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15
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Kubicek V, David T, Lubal P, Pietzsch HJ, Hermann P. Cross-bridged cyclams with bis (phosphinic acid) pendants for a fast Cu(II) complexation: towards efficient 64Cu labeling. Nucl Med Biol 2019. [DOI: 10.1016/s0969-8051(19)30219-7] [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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16
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Heissl A, Betancourt AJ, Hermann P, Povysil G, Arbeithuber B, Futschik A, Ebner T, Tiemann-Boege I. The impact of poly-A microsatellite heterologies in meiotic recombination. Life Sci Alliance 2019; 2:2/2/e201900364. [PMID: 31023833 PMCID: PMC6485458 DOI: 10.26508/lsa.201900364] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 03/27/2019] [Accepted: 03/29/2019] [Indexed: 12/12/2022] Open
Abstract
Meiosis strongly influences the transmission and evolution of heterozygous poly-A repeats as measured experimentally in a large collection of single recombination products in a human hotspot. Meiotic recombination has strong, but poorly understood effects on short tandem repeat (STR) instability. Here, we screened thousands of single recombinant products with sperm typing to characterize the role of polymorphic poly-A repeats at a human recombination hotspot in terms of hotspot activity and STR evolution. We show that the length asymmetry between heterozygous poly-A’s strongly influences the recombination outcome: a heterology of 10 A’s (9A/19A) reduces the number of crossovers and elevates the frequency of non-crossovers, complex recombination products, and long conversion tracts. Moreover, the length of the heterology also influences the STR transmission during meiotic repair with a strong and significant insertion bias for the short heterology (6A/7A) and a deletion bias for the long heterology (9A/19A). In spite of this opposing insertion-/deletion-biased gene conversion, we find that poly-A’s are enriched at human recombination hotspots that could have important consequences in hotspot activation.
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Affiliation(s)
- Angelika Heissl
- Institute of Biophysics, Johannes Kepler University, Linz, Austria
| | | | - Philipp Hermann
- Institute of Applied Statistics, Johannes Kepler University, Linz, Austria
| | - Gundula Povysil
- Institute of Bioinformatics, Johannes Kepler University, Linz, Austria
| | | | - Andreas Futschik
- Institute of Applied Statistics, Johannes Kepler University, Linz, Austria
| | - Thomas Ebner
- Department of Gynecology, Obstetrics and Gynecological Endocrinology, Kepler University Clinic, Linz, Austria
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17
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Hermann P, Heissl A, Tiemann-Boege I, Futschik A. LDJump: Estimating variable recombination rates from population genetic data. Mol Ecol Resour 2019; 19:623-638. [PMID: 30666785 PMCID: PMC6519033 DOI: 10.1111/1755-0998.12994] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [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: 06/22/2018] [Revised: 12/13/2018] [Accepted: 01/11/2019] [Indexed: 11/27/2022]
Abstract
As recombination plays an important role in evolution, its estimation and the identification of hotspot positions is of considerable interest. We propose a novel approach for estimating population recombination rates based on genotyping or sequence data that involves a sequential multiscale change point estimator. Our method also permits demography to be taken into account. It uses several summary statistics within a regression model fitted on suitable scenarios. Our proposed method is accurate, computationally fast, and provides a parsimonious solution by ensuring a type I error control against too many changes in the recombination rate. An application to human genome data suggests a good congruence between our estimated and experimentally identified hotspots. Our method is implemented in the R‐package LDJump, which is freely available at https://github.com/PhHermann/LDJump.
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Affiliation(s)
- Philipp Hermann
- Department of Applied Statistics, Johannes Kepler University Linz, Linz, Austria
| | - Angelika Heissl
- Institute of Biophysics, Johannes Kepler University Linz, Linz, Austria
| | | | - Andreas Futschik
- Department of Applied Statistics, Johannes Kepler University Linz, Linz, Austria
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Ransmayr G, Hermann P, Sallinger K, Benke T, Seiler S, Dal-Bianco P, Marksteiner J, Defrancesco M, Sanin G, Struhal W, Guger M, Vosko M, Hagenauer K, Lehner R, Futschik A, Schmidt R. Caregiving and Caregiver Burden in Dementia Home Care: Results from the Prospective Dementia Registry (PRODEM) of the Austrian Alzheimer Society. J Alzheimers Dis 2018; 63:103-114. [DOI: 10.3233/jad-170657] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Gerhard Ransmayr
- Department of Neurology 2, Med Campus III, Kepler University Hospital, Faculty of Medicine, Johannes Kepler University Linz, Austria
| | - Philipp Hermann
- Department of Applied Statistics, Johannes Kepler University Linz, Austria
| | | | - Thomas Benke
- Department of Neurology, Medical University Innsbruck, Austria
| | - Stephan Seiler
- Department of Neurology, Section of Neurogeriatrics, Medical University Graz, Austria
| | | | - Josef Marksteiner
- Department of Psychiatry and Psychotherapy, Regional Hospital Hall, Austria
| | - Michaela Defrancesco
- Department of Psychiatry and Psychotherapy, Medical University Innsbruck, Austria
| | - Günter Sanin
- Department of Neurology, Medical University Innsbruck, Austria
| | - Walter Struhal
- Department of Neurology 2, Med Campus III, Kepler University Hospital, Faculty of Medicine, Johannes Kepler University Linz, Austria
| | - Michael Guger
- Department of Neurology 2, Med Campus III, Kepler University Hospital, Faculty of Medicine, Johannes Kepler University Linz, Austria
| | - Milan Vosko
- Department of Neurology 2, Med Campus III, Kepler University Hospital, Faculty of Medicine, Johannes Kepler University Linz, Austria
| | - Karin Hagenauer
- Department for Clinical and Health Psychology, Med Campus III, Kepler University Hospital, Linz, Austria
| | - Riccarda Lehner
- Department of Neurology 2, Med Campus III, Kepler University Hospital, Faculty of Medicine, Johannes Kepler University Linz, Austria
| | - Andreas Futschik
- Department of Applied Statistics, Johannes Kepler University Linz, Austria
| | - Reinhold Schmidt
- Department of Neurology, Section of Neurogeriatrics, Medical University Graz, Austria
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Dries M, Obermair M, Hettler S, Hermann P, Seemann K, Seifried F, Ulrich S, Fischer R, Gerthsen D. Oxide-free aC/Zr 0.65Al 0.075Cu 0.275/aC phase plates for transmission electron microscopy. Ultramicroscopy 2018; 189:39-45. [PMID: 29604501 DOI: 10.1016/j.ultramic.2018.03.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 01/16/2018] [Revised: 02/22/2018] [Accepted: 03/02/2018] [Indexed: 11/28/2022]
Abstract
Thin-film phase plates (PP) have become a valuable tool for the imaging of organic objects in transmission electron microscopy (TEM). The thin film usually consists of amorphous carbon (aC), which undergoes rapid aging under intense illumination with high-energy electrons. The limited lifetime of aC film PPs calls for alternative PP materials with improved material stability. This work presents thin-film PPs fabricated from the metallic glass alloy Zr0.65Al0.075Cu0.275 (ZAC), which was identified as a promising PP material with beneficial properties, such as a large inelastic mean free path. An adverse effect of the ZAC alloy is the formation of a surface oxide layer in ambient air, which reduces the electrical conductivity and causes electrostatic charging in the electron beam. To avoid surface oxidation, the ZAC alloy is enclosed by thin aC layers. The resulting aC/ZAC/aC layer system is used to fabricate Zernike and Hilbert PPs. Phase-contrast TEM imaging is demonstrated for a sample of carbon nanotubes, which show strong contrast enhancement in PP TEM images.
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Affiliation(s)
- M Dries
- Karlsruher Institut für Technologie (KIT), Laboratorium für Elektronenmikroskopie (LEM), Engesserstraße 7, D-76131, Karlsruhe, Germany
| | - M Obermair
- Karlsruher Institut für Technologie (KIT), Laboratorium für Elektronenmikroskopie (LEM), Engesserstraße 7, D-76131, Karlsruhe, Germany.
| | - S Hettler
- Karlsruher Institut für Technologie (KIT), Laboratorium für Elektronenmikroskopie (LEM), Engesserstraße 7, D-76131, Karlsruhe, Germany
| | - P Hermann
- Karlsruher Institut für Technologie (KIT), Laboratorium für Elektronenmikroskopie (LEM), Engesserstraße 7, D-76131, Karlsruhe, Germany
| | - K Seemann
- Karlsruher Institut für Technologie (KIT), Institut für Angewandte Materialien (IAM), Hermann-von-Helmholtz-Platz 1, D-76344, Eggenstein-Leopoldshafen, Germany
| | - F Seifried
- Karlsruher Institut für Technologie (KIT), Institut für Angewandte Materialien (IAM), Hermann-von-Helmholtz-Platz 1, D-76344, Eggenstein-Leopoldshafen, Germany
| | - S Ulrich
- Karlsruher Institut für Technologie (KIT), Institut für Angewandte Materialien (IAM), Hermann-von-Helmholtz-Platz 1, D-76344, Eggenstein-Leopoldshafen, Germany
| | - R Fischer
- Karlsruher Institut für Technologie (KIT), Institut für Physikalische Chemie (IPC), Fritz-Haber-Weg 2, D-76131, Karlsruhe, Germany
| | - D Gerthsen
- Karlsruher Institut für Technologie (KIT), Laboratorium für Elektronenmikroskopie (LEM), Engesserstraße 7, D-76131, Karlsruhe, Germany
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20
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Ševčík R, Vaněk J, Michalicová R, Lubal P, Hermann P, Santos IC, Santos I, Campello MPC. Formation and decomplexation kinetics of copper(ii) complexes with cyclen derivatives having mixed carboxylate and phosphonate pendant arms. Dalton Trans 2018; 45:12723-33. [PMID: 27460053 DOI: 10.1039/c6dt01127f] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The kinetic properties of Cu(ii) complexes of H4dota and its analogues with one (H5do3ap), two in the 1,7-position (trans-H6do2a2p), three (H7doa3p) and four (H8dotp) phosphonic acid pendant arms were investigated. The formation of a Cu(ii) complex with H4dota, trans-H6do2a2p and H8dotp at a slightly acidic pH is faster for the phosphonic acid derivatives than for H4dota, but with no simple dependence on the number of -CH2PO3H2 substituents (trans-H6do2a2p > H8dotp > H4dota; pH 4-6). Relative differences in the reactivity among the differently protonated species (HnL(x-)) of the same ligand are successively decreased with the more phosphonic acid groups in the ligand. The faster complexation is probably caused by the higher ability of phosphonates to bind the metal ion and/or to assist in the transfer of protons from the ring amine groups to the bulk water. The acid-assisted decomplexation kinetics of the complexes was followed in highly acidic solutions ([H(+)] = 0.01-5 M) and at different temperatures (15-70 °C) to determine the activation parameters of the reaction. The kinetic inertness of the Cu(ii) complexes follows the order: H4dota > H5do3ap > trans-H6do2a2p > H7doa3p > H8dotp. To obtain information on the influence of additional pendant arms, analogous data were obtained for trans-H2do2a. The ligand is less reactive than H4dota, but the kinetic inertness of its Cu(ii) complex is similar to that of the H4dota complex. As it was considered that the published thermodynamics data on the Cu(ii)-H8dotp system are probably incorrect, the system was re-investigated. It showed a very high stability for the [Cu(dotp)](6-) species and the easy formation of several Cu2L species in the presence of an excess of the metal ion. Also, the structure of the (H6doa3p)(-) anion in the solid state was determined. These experimental data demonstrate that the substitution of acetic acid pendant arms by methylphosphonic acid ones in H4dota-like ligands increases the rate of complexation but significantly decreases the kinetic inertness of the Cu(ii) complexes.
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Affiliation(s)
- R Ševčík
- Department of Chemistry, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic.
| | - J Vaněk
- Department of Chemistry, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic. and Central European Institute of Technology (CEITEC), Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - R Michalicová
- Department of Chemistry, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic.
| | - P Lubal
- Department of Chemistry, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic. and Central European Institute of Technology (CEITEC), Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - P Hermann
- Department of Inorganic Chemistry, Faculty of Science, Universita Karlova (Charles University), Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - I C Santos
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal.
| | - I Santos
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal.
| | - M P C Campello
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal.
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21
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Végh D, Somogyi A, Bányai D, Lakatos M, Balogh M, Al-Khrasani M, Fürst S, Vizi E, Hermann P. Effects of articaine on [ 3 H]noradrenaline release from cortical and spinal cord slices prepared from normal and streptozotocin-induced diabetic rats and compared to lidocaine. Brain Res Bull 2017; 135:157-162. [DOI: 10.1016/j.brainresbull.2017.10.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 10/12/2017] [Accepted: 10/16/2017] [Indexed: 11/29/2022]
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23
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Hermelink A, Naumann D, Piesker J, Lasch P, Laue M, Hermann P. Towards a correlative approach for characterising single virus particles by transmission electron microscopy and nanoscale Raman spectroscopy. Analyst 2017; 142:1342-1349. [DOI: 10.1039/c6an02151d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The morphology and structure of biological nanoparticles, such as viruses, can be efficiently analysed by transmission electron microscopy (TEM).
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Affiliation(s)
- A. Hermelink
- Centre for Biological Threats and Special Pathogens – Proteomics and Spectroscopy (ZBS6)
- Robert Koch-Institute
- 13353 Berlin
- Germany
| | - D. Naumann
- Centre for Biological Threats and Special Pathogens – Proteomics and Spectroscopy (ZBS6)
- Robert Koch-Institute
- 13353 Berlin
- Germany
| | - J. Piesker
- Centre for Biological Threats and Special Pathogens – Advanced Light and Electron Microscopy (ZBS4)
- Robert Koch-Institute
- 13353 Berlin
- Germany
| | - P. Lasch
- Centre for Biological Threats and Special Pathogens – Proteomics and Spectroscopy (ZBS6)
- Robert Koch-Institute
- 13353 Berlin
- Germany
| | - M. Laue
- Centre for Biological Threats and Special Pathogens – Advanced Light and Electron Microscopy (ZBS4)
- Robert Koch-Institute
- 13353 Berlin
- Germany
| | - P. Hermann
- Centre for Biological Threats and Special Pathogens – Proteomics and Spectroscopy (ZBS6)
- Robert Koch-Institute
- 13353 Berlin
- Germany
- Physikalisch-Technische Bundesanstalt (PTB)
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24
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Buras A, van der Maaten-Theunissen M, van der Maaten E, Ahlgrimm S, Hermann P, Simard S, Heinrich I, Helle G, Unterseher M, Schnittler M, Eusemann P, Wilmking M. Tuning the Voices of a Choir: Detecting Ecological Gradients in Time-Series Populations. PLoS One 2016; 11:e0158346. [PMID: 27467508 PMCID: PMC4965043 DOI: 10.1371/journal.pone.0158346] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Accepted: 06/14/2016] [Indexed: 11/18/2022] Open
Abstract
This paper introduces a new approach–the Principal Component Gradient Analysis (PCGA)–to detect ecological gradients in time-series populations, i.e. several time-series originating from different individuals of a population. Detection of ecological gradients is of particular importance when dealing with time-series from heterogeneous populations which express differing trends. PCGA makes use of polar coordinates of loadings from the first two axes obtained by principal component analysis (PCA) to define groups of similar trends. Based on the mean inter-series correlation (rbar) the gain of increasing a common underlying signal by PCGA groups is quantified using Monte Carlo Simulations. In terms of validation PCGA is compared to three other existing approaches. Focusing on dendrochronological examples, PCGA is shown to correctly determine population gradients and in particular cases to be advantageous over other considered methods. Furthermore, PCGA groups in each example allowed for enhancing the strength of a common underlying signal and comparably well as hierarchical cluster analysis. Our results indicate that PCGA potentially allows for a better understanding of mechanisms causing time-series population gradients as well as objectively enhancing the performance of climate transfer functions in dendroclimatology. While our examples highlight the relevance of PCGA to the field of dendrochronology, we believe that also other disciplines working with data of comparable structure may benefit from PCGA.
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Affiliation(s)
- Allan Buras
- Institute of Botany and Landscape Ecology, Ernst-Moritz-Arndt-Universität, Soldmannstraße 15, 17487 Greifswald, Germany
- * E-mail:
| | | | - Ernst van der Maaten
- Institute of Botany and Landscape Ecology, Ernst-Moritz-Arndt-Universität, Soldmannstraße 15, 17487 Greifswald, Germany
| | - Svenja Ahlgrimm
- Institute of Botany and Landscape Ecology, Ernst-Moritz-Arndt-Universität, Soldmannstraße 15, 17487 Greifswald, Germany
| | - Philipp Hermann
- Institute of Botany and Landscape Ecology, Ernst-Moritz-Arndt-Universität, Soldmannstraße 15, 17487 Greifswald, Germany
| | - Sonia Simard
- GFZ German Research Centre for Geosciences, Section 5.2, Telegrafenberg, 14473 Potsdam, Germany
| | - Ingo Heinrich
- GFZ German Research Centre for Geosciences, Section 5.2, Telegrafenberg, 14473 Potsdam, Germany
| | - Gerd Helle
- GFZ German Research Centre for Geosciences, Section 5.2, Telegrafenberg, 14473 Potsdam, Germany
| | - Martin Unterseher
- Institute of Botany and Landscape Ecology, Ernst-Moritz-Arndt-Universität, Soldmannstraße 15, 17487 Greifswald, Germany
| | - Martin Schnittler
- Institute of Botany and Landscape Ecology, Ernst-Moritz-Arndt-Universität, Soldmannstraße 15, 17487 Greifswald, Germany
| | - Pascal Eusemann
- Institute of Botany and Landscape Ecology, Ernst-Moritz-Arndt-Universität, Soldmannstraße 15, 17487 Greifswald, Germany
| | - Martin Wilmking
- Institute of Botany and Landscape Ecology, Ernst-Moritz-Arndt-Universität, Soldmannstraße 15, 17487 Greifswald, Germany
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25
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Kerdjoudj R, Pniok M, Alliot C, Kubíček V, Havlíčková J, Rösch F, Hermann P, Huclier-Markai S. Scandium(iii) complexes of monophosphorus acid DOTA analogues: a thermodynamic and radiolabelling study with 44Sc from cyclotron and from a 44Ti/44Sc generator. Dalton Trans 2016; 45:1398-409. [DOI: 10.1039/c5dt04084a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The influence of the phosphonic/phosphinic acid pendant arm in DOTA derivatives on properties of their Sc3+ complexes and efficiency of their 44Sc labelling were investigated.
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Affiliation(s)
- R. Kerdjoudj
- Laboratoire Subatech
- UMR 6457
- Ecole des Mines de Nantes/CNRS/IN2P3/Université de Nantes
- F-44307 Nantes Cedex 3
- France
| | - M. Pniok
- Department of Inorganic Chemistry
- Faculty of Science
- Universita Karlova
- CZ-12843 Prague 2
- Czech Republic
| | - C. Alliot
- ARRONAX GIP
- F-44817 Nantes Cedex
- France
- CRCNA
- Inserm/CNRS/Université de Nantes
| | - V. Kubíček
- Department of Inorganic Chemistry
- Faculty of Science
- Universita Karlova
- CZ-12843 Prague 2
- Czech Republic
| | - J. Havlíčková
- Department of Inorganic Chemistry
- Faculty of Science
- Universita Karlova
- CZ-12843 Prague 2
- Czech Republic
| | - F. Rösch
- Institute of Nuclear Chemistry
- Johannes-Gutenberg-University of Mainz
- D-55128 Mainz
- Germany
| | - P. Hermann
- Department of Inorganic Chemistry
- Faculty of Science
- Universita Karlova
- CZ-12843 Prague 2
- Czech Republic
| | - S. Huclier-Markai
- Laboratoire Subatech
- UMR 6457
- Ecole des Mines de Nantes/CNRS/IN2P3/Université de Nantes
- F-44307 Nantes Cedex 3
- France
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26
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Krchová T, Gálisová A, Jirák D, Hermann P, Kotek J. Ln(iii)-complexes of a DOTA analogue with an ethylenediamine pendant arm as pH-responsive PARACEST contrast agents. Dalton Trans 2016; 45:3486-96. [DOI: 10.1039/c5dt04443j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
New contrast agents useful for pH determination (in the biologically relevant pH range) by Magnetic Resonance Imaging (MRI) using magnetization transfer ratio approach are presented.
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Affiliation(s)
- T. Krchová
- Department of Inorganic Chemistry
- Faculty of Science
- Universita Karlova (Charles University)
- 128 43 Prague 2
- Czech Republic
| | - A. Gálisová
- Department of Radiodiagnostic and Interventional Radiology
- Magnetic Resonance Unit
- Institute for Clinical and Experimental Medicine
- Prague 4
- Czech Republic
| | - D. Jirák
- Department of Radiodiagnostic and Interventional Radiology
- Magnetic Resonance Unit
- Institute for Clinical and Experimental Medicine
- Prague 4
- Czech Republic
| | - P. Hermann
- Department of Inorganic Chemistry
- Faculty of Science
- Universita Karlova (Charles University)
- 128 43 Prague 2
- Czech Republic
| | - J. Kotek
- Department of Inorganic Chemistry
- Faculty of Science
- Universita Karlova (Charles University)
- 128 43 Prague 2
- Czech Republic
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Hermann P, Mrkvička T, Mattfeldt T, Minárová M, Helisová K, Nicolis O, Wartner F, Stehlík M. Fractal and stochastic geometry inference for breast cancer: a case study with random fractal models and Quermass-interaction process. Stat Med 2015; 34:2636-61. [PMID: 25847279 DOI: 10.1002/sim.6497] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 03/05/2015] [Accepted: 03/12/2015] [Indexed: 11/10/2022]
Abstract
Fractals are models of natural processes with many applications in medicine. The recent studies in medicine show that fractals can be applied for cancer detection and the description of pathological architecture of tumors. This fact is not surprising, as due to the irregular structure, cancerous cells can be interpreted as fractals. Inspired by Sierpinski carpet, we introduce a flexible parametric model of random carpets. Randomization is introduced by usage of binomial random variables. We provide an algorithm for estimation of parameters of the model and illustrate theoretical and practical issues in generation of Sierpinski gaskets and Hausdorff measure calculations. Stochastic geometry models can also serve as models for binary cancer images. Recently, a Boolean model was applied on the 200 images of mammary cancer tissue and 200 images of mastopathic tissue. Here, we describe the Quermass-interaction process, which can handle much more variations in the cancer data, and we apply it to the images. It was found out that mastopathic tissue deviates significantly stronger from Quermass-interaction process, which describes interactions among particles, than mammary cancer tissue does. The Quermass-interaction process serves as a model describing the tissue, which structure is broken to a certain level. However, random fractal model fits well for mastopathic tissue. We provide a novel discrimination method between mastopathic and mammary cancer tissue on the basis of complex wavelet-based self-similarity measure with classification rates more than 80%. Such similarity measure relates to Hurst exponent and fractional Brownian motions. The R package FractalParameterEstimation is developed and introduced in the paper.
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Affiliation(s)
- Philipp Hermann
- Department of Applied Statistics, Johannes Kepler University Linz, Linz, Austria
| | - Tomáš Mrkvička
- Department of Applied Mathematics and Informatics, University of South Bohemia in České Budějovice, České Budějovice, Czech Republic
| | | | - Mária Minárová
- Department of Mathematics, Slovak University of Technology, Bratislava, Slovak Republic
| | - Kateřina Helisová
- Department of Mathematics, Czech Technical University in Prague, Prague, Czech Republic
| | - Orietta Nicolis
- Institute of Statistics, University of Valparaíso, Valparaíso, Chile
| | - Fabian Wartner
- Department of Applied Statistics, Johannes Kepler University Linz, Linz, Austria
| | - Milan Stehlík
- Department of Applied Statistics, Johannes Kepler University Linz, Linz, Austria.,Departamento de Matemática, Universidad Técnica Federico Santa María, Valparaíso, Chile
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29
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Rostášová I, Vilková M, Vargová Z, Walko M, Almáši M, Imrich J, Hermann P, Lukeš I. Dipeptide interactions with Zn(II)-cyclen artificial model for molecular recognition. J Mol Recognit 2015; 28:211-9. [PMID: 25664614 DOI: 10.1002/jmr.2416] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 04/08/2014] [Revised: 07/08/2014] [Accepted: 08/06/2014] [Indexed: 11/11/2022]
Abstract
The Zn(II)-cyclen-dipeptide ternary systems (where cyclen is abbreviated as L and dipeptide is glycylglycine (HL(1)) or glycyl-(S)-alanine (HL(2))) were investigated by potentiometry applying both "out-of-cell" and direct titrations and by (1) H NMR spectroscopy. Especially, the (1)H NMR study was found to be very efficient to estimate speciation in the systems. The results obtained under full equilibria indicated two main species, [Zn(L)(HL(1,2))](2+) and [Zn(L)(L(1,2))](+), in both the systems. In the [Zn(L)(HL(1,2))](2+) complex, presence of carbonyl-carboxylate chelate was confirmed, and in the [Zn(L)(L(1,2))](+) species, the peptide coordination is re-organized to carbonyl-amine chelate or only terminal amino group is coordinated. Equilibrium constants describing [Zn(L)](2+)-dipeptide interaction are relatively low, log K = 3.4 for Gly-Gly and 4.1 for Gly-(S)-Ala, respectively. Nevertheless, the values are slightly higher than stability constants for interaction of Zn(II) with the dipeptides (i.e. [Zn(L(1,2))](+) species) where a chelate formation is expected. It indicates that interaction between Zn(II) ion in [Zn(L)](2+) and the dipeptides should be supported by some additional interactions. Potentiometry carried out under non-equilibrum condition showed different species where these additional stabilizing forces play more important role.
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Affiliation(s)
- I Rostášová
- Department of Inorganic Chemistry, Institute of Chemistry, P.J.Šafárik University, Moyzesova 11, 04154, Košice, Slovak Republic
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Lausch V, Hermann P, Laue M, Bannert N. Silicon nitride grids are compatible with correlative negative staining electron microscopy and tip-enhanced Raman spectroscopy for use in the detection of micro-organisms. J Appl Microbiol 2014; 116:1521-30. [DOI: 10.1111/jam.12492] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 02/24/2014] [Accepted: 02/24/2014] [Indexed: 12/31/2022]
Affiliation(s)
- V. Lausch
- Division for HIV and other Retroviruses; FG18; Robert Koch Institute; Berlin Germany
- Advanced Light and Electron Microscopy; ZBS4; Robert Koch Institute; Berlin Germany
| | - P. Hermann
- Proteomics and Spectroscopy of Highly Pathogenic Microorganisms; ZBS6; Robert Koch Institute; Berlin Germany
| | - M. Laue
- Advanced Light and Electron Microscopy; ZBS4; Robert Koch Institute; Berlin Germany
| | - N. Bannert
- Division for HIV and other Retroviruses; FG18; Robert Koch Institute; Berlin Germany
- Advanced Light and Electron Microscopy; ZBS4; Robert Koch Institute; Berlin Germany
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Laznickova A, Biricova V, Laznicek M, Hermann P. Mono(pyridine-N-oxide) DOTA analog and its G1/G4-PAMAM dendrimer conjugates labeled with 177Lu: Radiolabeling and biodistribution studies. Appl Radiat Isot 2014; 84:70-7. [DOI: 10.1016/j.apradiso.2013.10.021] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Revised: 10/22/2013] [Accepted: 10/26/2013] [Indexed: 02/05/2023]
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32
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Vestergaard P, Hermann P, Jensen JEB, Eiken P, Mosekilde L. Effects of paracetamol, non-steroidal anti-inflammatory drugs, acetylsalicylic acid, and opioids on bone mineral density and risk of fracture: results of the Danish Osteoporosis Prevention Study (DOPS). Osteoporos Int 2012; 23:1255-65. [PMID: 21710339 DOI: 10.1007/s00198-011-1692-0] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Accepted: 06/06/2011] [Indexed: 10/18/2022]
Abstract
UNLABELLED Pain medication has been associated with fractures. We found higher weight in paracetamol and non-steroidal anti-inflammatory drugs (NSAID) users and lower vitamin D levels in opioid and acetylsalicylic acid users. None of the pain medications influenced bone mineral density or loss. NSAID were associated with an increased fracture risk. INTRODUCTION To study the effects of use of paracetamol, non-steroidal anti-inflammatory drugs (NSAID), acetylsalicylic acid (ASA), and opioids on bone mineral density (BMD) and risk of fractures. METHODS Two-thousand sixteen perimenopausal women followed for 10 years as part of a partly randomised comprehensive cohort study on hormone therapy (HT). BMD was measured at baseline and after 10 years by DXA (Hologic). RESULTS Paracetamol users were heavier (70.4 ± 13.4 vs. 67.7 ± 11.9 kg, 2p < 0.01) than non-users. NSAID users were heavier (71.6 ± 15.6 vs. 67.8 ± 11.9 kg, 2p = 0.04) than non-users. ASA users had lower 25-hydroxy-vitamin D (25OHD) levels (21.9 ± 9.3 vs. 25.3 ± 12.4 ng/ml, 2p < 0.01) than non-users. Opioid users had lower 25OHD (21.4 ± 8.4 vs. 25.2 ± 12.3 ng/ml) and lower intake of vitamin D (2.2 ± 1.1 vs. 3.1 ± 3.0 μg/day, 2p < 0.01) than non-users. Despite these differences, no baseline differences were present in spine, hip, forearm or whole body BMD. Over 10 years, no differences were present in BMD alterations except a small trend towards a higher BMD gain in the spine in users of paracetamol, NSAID, ASA, and opioids compared to non-exposed. After adjustment, NSAID exposed sustained more fractures (HR = 1.44, 95% CI 1.07-1.93) than non-users. For users of paracetamol and opioids, a non-significant trend towards more fractures was present after adjustment. For ASA users, no excess risk of fractures was present. CONCLUSION Significant differences exist between subjects exposed to pain medications and non-users. Despite an absence of an effect over time on BMD, users of NSAID experienced more fractures than expected. The reasons for this have to be explored in further studies.
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MESH Headings
- Acetaminophen/administration & dosage
- Acetaminophen/adverse effects
- Acetaminophen/pharmacology
- Analgesics, Non-Narcotic/administration & dosage
- Analgesics, Non-Narcotic/adverse effects
- Analgesics, Non-Narcotic/pharmacology
- Analgesics, Opioid/administration & dosage
- Analgesics, Opioid/adverse effects
- Analgesics, Opioid/pharmacology
- Anthropometry/methods
- Anti-Inflammatory Agents, Non-Steroidal/administration & dosage
- Anti-Inflammatory Agents, Non-Steroidal/adverse effects
- Anti-Inflammatory Agents, Non-Steroidal/pharmacology
- Aspirin/administration & dosage
- Aspirin/adverse effects
- Aspirin/pharmacology
- Bone Density/drug effects
- Denmark/epidemiology
- Dose-Response Relationship, Drug
- Female
- Follow-Up Studies
- Humans
- Middle Aged
- Osteoporotic Fractures/chemically induced
- Osteoporotic Fractures/epidemiology
- Osteoporotic Fractures/physiopathology
- Risk Assessment/methods
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Affiliation(s)
- P Vestergaard
- Department of Endocrinology and Internal Medicine (MEA), Aarhus University Hospital, Aarhus, Denmark.
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Nemeth O, Pinke I, Vecsei B, Kristof K, Garami M, Kivovics P, Hermann P. 4133 POSTER Quantitative and Qualitative Investigations of Salivary Gland Function in Children Cancer Survivors. Eur J Cancer 2011. [DOI: 10.1016/s0959-8049(11)71311-9] [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: 10/17/2022]
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Huclier-Markai S, Sabatie A, Ribet S, Kubícek V, Paris M, Vidaud C, Hermann P, Cutler CS. Chemical and biological evaluation of scandium(III)-polyaminopolycarboxylate complexes as potential PET agents and radiopharmaceuticals. ACTA ACUST UNITED AC 2011. [DOI: 10.1524/ract.2011.1869] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
Scandium isotopes (44Sc, 47Sc) are more available and their properties are convenient for either PET imaging or radiotherapy. To use them in nuclear medicine, ligands forming complexes with a high stability are necessary. Available experimental data on stability constants for complexes of ligands such as EDTA, DTPA, DOTA, NOTA and TETA with various metal ions have been published. But scandium is the exception since scarce data is available in the literature. Values of stability constants of Sc(III) with the ligands were determined by free-ion selective radiotracer extraction, complemented by 45Sc NMR and potentiometry data. The thermodynamic stability of the Sc-complexes increases in the order TETA < NOTA < EDTA < DTPA < DOTA. The in vitro stability of the Sc(III) complexes was studied in the presence of hydroxyapatite and rat serum to estimate their in vivo stability. The most stable complex was shown to be Sc-DOTA.
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Affiliation(s)
| | - A. Sabatie
- Université de Nantes, Ecole des Mines de Nantes/CNRS/IN2P3, Nantes Cedex 3, Frankreich
| | - S. Ribet
- Université de Nantes, Ecole des Mines de Nantes/CNRS/IN2P3, Nantes Cedex 3, Frankreich
| | - V. Kubícek
- Charles University in Prague, Department of Inorganic Chemistry, Prague, Tschechische Republik
| | - M. Paris
- Université de Nantes, Institut des Matériaux Jean Rouxel, Nantes Cedex 3, Frankreich
| | - C. Vidaud
- CEA Marcoule DSV/DIEP/SBTN, Bagnols sur Cèze Cedex, Frankreich
| | - P. Hermann
- Charles University in Prague, Department of Inorganic Chemistry, Prague, Tschechische Republik
| | - C. S. Cutler
- University of Missouri, Research Reactor Center, Columbia, MO65211, U.S.A
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Vargová Z, Balentová E, Walko M, Arabuli L, Hermann P, Lukeš I. Amino acids binding to Zn2+-cyclen molecular receptor in aqueous solution. J Mol Recognit 2011; 24:295-302. [DOI: 10.1002/jmr.1059] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Kristóf K, Kocsis E, Szabó D, Kardos S, Cser V, Nagy K, Hermann P, Rozgonyi F. Significance of methicillin–teicoplanin resistant Staphylococcus haemolyticus in bloodstream infections in patients of the Semmelweis University hospitals in Hungary. Eur J Clin Microbiol Infect Dis 2011; 30:691-9. [DOI: 10.1007/s10096-010-1142-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Accepted: 12/20/2010] [Indexed: 11/24/2022]
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Károlyházy K, Kivovics P, Hermann P, Fejérdy P, Arányi Z. Five-year follow-up of oral health and seizure condition of patients with epilepsy: a prospective observational study. Community Dent Health 2010; 27:233-237. [PMID: 21473359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
OBJECTIVE A five-year follow up of patients with epilepsy to examine the change in their oral health and seizure condition. BASIC RESEARCH DESIGN A prospective observational controlled epidemiologic study under natural treatment settings. PARTICIPANTS The epilepsy group consisted wholly of patients participating in an epidemiologic survey performed five years previously. The gender- and age-matched control (non-epilepsy) group consisted partly of subjects recovered from the previous study, and partly of new subjects. INTERVENTIONS Data pertaining to the disease were collected and a thorough dental examination was performed. MAIN OUTCOME MEASURES Indices quantifying oral hygiene, the number and condition of the remaining teeth and periodontium, and the degree of prosthetic treatment were measured. Statistical comparison was performed between the patient and the control group of the present study, and pair wise between the previous and the present survey. RESULTS The epileptic condition of the patients showed significant improvement upon follow-up, in contrast to a significant deterioration in their oral health as compared to the control group. Concerning oral health, dental indices describing oral hygiene and periodontal condition showed the most pronounced decline. CONCLUSIONS The improvement in the epileptic condition of patients is attributed to changes in treatment strategies. As the epileptic condition and oral health of patients changed in opposite directions, socioeconomic and educational factors appear to play a more important role in the poor oral health of these patients than disease-specific factors (e.g. oral cavity injuries, increased exertion on the teeth, antiepileptic drug effects). Furthermore, the periodontal condition seems to be main factor responsible for the unfavourable dental status.
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Affiliation(s)
- K Károlyházy
- Dept. of Prosthetic Dentistry, Faculty of Dentistry, Semmelweis University, Budapest, Hungary
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Vargová Z, Gyepes R, Arabuli L, Györyová K, Hermann P, Lukeš I. Synthesis, crystal structures and spectroscopic properties of three Zn–cyclen–aminoacid complexes with new macrocyclic configurations. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.03.027] [Citation(s) in RCA: 7] [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: 10/21/2022]
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Abstract
Diltiazem, as well as other calcium entry blockers, is widely prescribed for the treatment of various types of angina. This review summarizes the current state of knowledge of the pharmacokinetics of diltiazem and of two other calcium entry blockers: verapamil and nifedipine. Although unrelated in their chemical structure, these three drugs have common features. They are highly lipophilic and have a large volume of distribution, are mainly cleared by metabolism and undergo an extensive first-pass extraction. On the other hand, as expected from their quite dissimilar structures, they have their own particular kinetic characteristics. For example, metabolism of diltiazem and verapamil gives rise to active metabolites; repeated administration influences the kinetic profile of verapamil but not those of diltiazem and nifedipine. Absorption, distribution and elimination of these three drugs are differently affected by age and pathological conditions. The possible drug interactions involving diltiazem and the other calcium entry blockers are discussed, particularly that with digoxin. Due to its large therapeutic index, there is no need for treatment monitoring of diltiazem. Nevertheless, this procedure may provide useful information for optimizing the dosage regimen of each patient as the pathological condition and drug therapy may be quite complex.
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Szabó Z, Sóczó G, Miszti C, Hermann P, Rozgonyi F. In vitro activity of fluconazole and amphotericin B against Candida inconspicua clinical isolates as determined by the time-kill method. Acta Microbiol Immunol Hung 2008; 55:53-61. [PMID: 18507151 DOI: 10.1556/amicr.55.2008.1.4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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: 11/19/2022]
Abstract
Candida inconspicua is an emerging pathogen in immunocompromised patients possessing inherently decreased susceptibility to fluconazole. We determined the MICs and killing activity of fluconazole and amphotericin B against C. inconspicua clinical isolates as well as reference strain C. inconspicua ATCC 16783 for comparison. MICs were determined using the standard broth microdilution method. Killing rates were determined using time-kill methodology at 0.5-16 x MIC fluconazole and amphotericin B concentrations. Fluconazole and amphotericin B MIC values varied between 16-128 mg/l and 0.5-1 mg/l, respectively. In time kill-assays fluconazole showed fungistatic effect at 1-16 x MIC concentrations against all tested strains after 24 h-incubation, but became fungicidal after 48 h at 4-16 x MIC concentrations. The time necessary to achieve fungicidal endpoint at 1 mg/l amphotericin B concentration ranged from 2 to 24 h. Our in vitro results confirm the data that fluconazole is ineffective against C. inconspicua at the fluconazole serum concentration attainable in humans. Amphotericin B due to its rapid killing activity seems to be a good alternative for the treatment of infections caused by C. inconspicua.
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Affiliation(s)
- Zsuzsanna Szabó
- Institute of Medical Microbiology, Doctoral School, Semmelweis University, Budapest, Hungary
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Piskula Z, Svobodová I, Lubal P, Lis S, Hnatejko Z, Hermann P. Kinetic study of dissociation of Eu(III) complex with H8dotp (H8dotp=1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrakis(methylphosphonic acid)). Inorganica Chim Acta 2007. [DOI: 10.1016/j.ica.2007.05.009] [Citation(s) in RCA: 14] [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: 11/25/2022]
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Laznickova A, Petrik M, Hermann P, Lukes I. Labeling of a bifunctional monophosphinic acid DOTA analogue with 111In: Radiochemical aspects and preclinical results. J Radioanal Nucl Chem 2007. [DOI: 10.1007/s10967-007-0914-6] [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: 10/23/2022]
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Lubal P, Maleček J, Hermann P, Kotek J, Havel J. Capillary electrophoretic separation and kinetic study of inert copper(II) complexes of 1,8-bis(methylphosphonate) derivative of cyclam. Polyhedron 2006. [DOI: 10.1016/j.poly.2005.12.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
Eighty persons with haematological malignancies receiving stem cell transplantation (SCT) were examined over a 24 months period. Hyposalivation, a common complaint in patients treated by intensive chemotherapy and radiotherapy can predispose to oral candidal colonisation as well. This study was focused on correlation between the fungal colonisation of the oral cavity and the total unstimulated saliva flow rate of 80 patients with haematological malignancies before and after stem cell transplantation and in addition, on their oral health state. Despite the fact that prior to being involved in the transplantation programme, the patients were subjected to dental examination and decayed teeth were found in 20 out of 80 patients (25%). From the 2233 different oropharyngeal specimens fungi were isolated before conditioning from 16 patients (20%), and during aplasia from 19 patients (23.7%). Objective xerostomia (unstimulated total saliva flow rate < or = 0.1 ml/min) was detected in 28 patients (35%). Stem cell transplant patients with pretransplant mouth dryness had higher incidence of Candida albicans and other fungal colonisation than those with normal saliva secretion.
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Affiliation(s)
- P Hermann
- Department of Prosthodontics, Faculty of Dentistry, Semmelweis University, Mikszáth K. tér 5, H-1088 Budapest, Hungary.
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Hermann P, Schreier E. Der Acetamidomethyl-Rest als Schutzgruppe für den Cystein-Schwefel bei der Festphasenpeptidsynthese nach MERRIFIELD. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/prac.19743160503] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Hermann P, Willhardt I, Bláha K, Frič I. Beitrag zur Ermittlung der absoluten Konfiguration der Sulfinyl-Gruppe bei Sulfoxiden von S-alkylierten L-Cystein-Derivaten. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/prac.19713130613] [Citation(s) in RCA: 6] [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: 11/11/2022]
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Hermann P, Forgács K, Gál E, Lenkey B, Nagy G, Rozgonyi F. Effects of alkali metal ions on some virulence traits of Candida albicans. Folia Microbiol (Praha) 2003; 48:173-6. [PMID: 12800499 DOI: 10.1007/bf02930951] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The effects of the alkali metal ions (Li+, Na+ and K+) on the growth and on certain virulence factors (adhesion, cell-surface hydrophobicity and germinating ability) of Candida albicans were determined. High concentrations of these ions displayed an inhibitory effect on the growth of the Candida cells; preincubation in their presence showed a negative effect on all virulence factors studied. The changes induced during the preincubation remained there even when high concentration of the ions was removed from the cell suspension. In contrast, a considerable growth was found at high Na+ and K+ concentrations. Although alkali metal ions significantly decreased certain virulence traits of the fungus they did not totally inhibit adhesion and germ-tube formation. This suggests that C. albicans may represent a health hazard even at a high salt concentration.
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Affiliation(s)
- P Hermann
- Department of Prosthodontics, Faculty of Dentistry, Semmelweis University, Budapest, Hungary
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Hermann P, Berek Z, Nagy G, Kamotsay K, Rozgonyi F. Pathogenesis, microbiological and clinical aspects of oral candidiasis (candidosis). Acta Microbiol Immunol Hung 2002; 48:479-95. [PMID: 11791346 DOI: 10.1556/amicr.48.2001.3-4.15] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The clinical significance of the oral candidiasis (either as independent disorder, or as a part of another disease) is increasing with time. The diagnosis and local treatment of the oral candidiasis may not be satisfactory, this disorder cannot be eliminated without the correct diagnosis and management of the underlying disease. At the same time, some disorders, such as Candida induced leukoplakia, may significantly enhance tumor development. Fungal infection of the mouth is often the initial sign of several immunodeficiency diseases. It is, therefore, very important to clarify the background of a fungal infection, since this may be critical regarding the prognosis.
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Affiliation(s)
- P Hermann
- Department of Prosthodontics, Faculty of Dentistry, Semmelweis University, P.O. Box 124, H-1431 Budapest, Hungary
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