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Masanneck L, Voth J, Huntemann N, Öztürk M, Schroeter CB, Ruck T, Meuth SG, Pawlitzki M. Introducing electronic monitoring of disease activity in patients with chronic inflammatory demyelinating polyneuropathy (EMDA CIDP): trial protocol of a proof of concept study. Neurol Res Pract 2023; 5:39. [PMID: 37612774 PMCID: PMC10464162 DOI: 10.1186/s42466-023-00267-3] [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: 04/02/2023] [Accepted: 07/07/2023] [Indexed: 08/25/2023] Open
Abstract
INTRODUCTION Chronic inflammatory demyelinating polyneuropathy (CIDP) is one of the most common immune neuropathies leading to severe impairments in daily life. Current treatment options include intravenous immunoglobulins (IVIG), which are administered at intervals of 4-12 weeks. Determination of individual treatment intervals is challenging since existing clinical scores lack sensitivity to objectify small, partially fluctuating deficits in patients. End-of-dose phenomena described by patients, manifested by increased fatigue and worsening of (motor) symptoms, are currently difficult to detect. From a medical and socio-economic point of view, it is necessary to identify and validate new, more sensitive outcome measures for accurate mapping of disease progression and, thus, for interval finding. Digital health technologies such as wearables may be particularly useful for this purpose, as they record real-life data and consequently, in contrast to classic clinical 'snapshots', can continuously depict the disease course. METHODS In this prospective, observational, non-interventional, single-center, investigator-initiated study, CIDP patients treated with IVIG will be continuously monitored over a period of 6 months. Clinical scores and blood analyses will be assessed and collected during three visits (V1, V2, V3). Additionally, activity, sleep, and cardiac parameters will be recorded over the entire period using a wearable device. Further, patients' subjective disease development and quality of life will be recorded at various visits (read-outs). The usability of the smartwatch will be assessed at the end of the study. PERSPECTIVE The study aims to evaluate different digital measurements obtained with the smartwatch and blood-based analyses for monitoring disease activity and progress in CIDP patients. In conjunction, both means of monitoring might offer detailed insights into behavioral and biological patterns associated with treatment-related fluctuations such as end-of-dose phenomena. TRIAL REGISTRATION The study protocol was registered at ClinicalTrials.gov. Identifier: NCT05723848. Initially, the protocol was submitted prospectively on January 10, 2023. The trial was publicly released after formal improvements on February 13, 2023, after first patients were included according to the original protocol.
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Affiliation(s)
- Lars Masanneck
- Department of Neurology, Medical Faculty University Hospital Düsseldorf, Heinrich-Heine University Duesseldorf, Moorenstraße 5, 40225, Düsseldorf, Germany
- Hasso Plattner Institute, University of Potsdam, 14482, Potsdam, Germany
| | - Jan Voth
- Department of Neurology, Medical Faculty University Hospital Düsseldorf, Heinrich-Heine University Duesseldorf, Moorenstraße 5, 40225, Düsseldorf, Germany
| | - Niklas Huntemann
- Department of Neurology, Medical Faculty University Hospital Düsseldorf, Heinrich-Heine University Duesseldorf, Moorenstraße 5, 40225, Düsseldorf, Germany
| | - Menekse Öztürk
- Department of Neurology, Medical Faculty University Hospital Düsseldorf, Heinrich-Heine University Duesseldorf, Moorenstraße 5, 40225, Düsseldorf, Germany
| | - Christina B Schroeter
- Department of Neurology, Medical Faculty University Hospital Düsseldorf, Heinrich-Heine University Duesseldorf, Moorenstraße 5, 40225, Düsseldorf, Germany
| | - Tobias Ruck
- Department of Neurology, Medical Faculty University Hospital Düsseldorf, Heinrich-Heine University Duesseldorf, Moorenstraße 5, 40225, Düsseldorf, Germany
| | - Sven G Meuth
- Department of Neurology, Medical Faculty University Hospital Düsseldorf, Heinrich-Heine University Duesseldorf, Moorenstraße 5, 40225, Düsseldorf, Germany
| | - Marc Pawlitzki
- Department of Neurology, Medical Faculty University Hospital Düsseldorf, Heinrich-Heine University Duesseldorf, Moorenstraße 5, 40225, Düsseldorf, Germany.
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Nelke C, Schroeter CB, Stascheit F, Pawlitzki M, Regner-Nelke L, Huntemann N, Arat E, Öztürk M, Melzer N, Mergenthaler P, Gassa A, Stetefeld H, Schroeter M, Berger B, Totzeck A, Hagenacker T, Schreiber S, Vielhaber S, Hartung HP, Meisel A, Wiendl H, Meuth SG, Ruck T. Eculizumab versus rituximab in generalised myasthenia gravis. J Neurol Neurosurg Psychiatry 2022; 93:548-554. [PMID: 35246490 PMCID: PMC9016243 DOI: 10.1136/jnnp-2021-328665] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 02/22/2022] [Indexed: 12/13/2022]
Abstract
OBJECTIVE Myasthenia gravis (MG) is the most common autoimmune disorder affecting the neuromuscular junction. However, evidence shaping treatment decisions, particularly for treatment-refractory cases, is sparse. Both rituximab and eculizumab may be considered as therapeutic options for refractory MG after insufficient symptom control by standard immunosuppressive therapies. METHODS In this retrospective observational study, we included 57 rituximab-treated and 20 eculizumab-treated patients with MG to compare the efficacy of treatment agents in generalised, therapy-refractory anti-acetylcholine receptor antibody (anti-AChR-ab)-mediated MG with an observation period of 24 months. Change in the quantitative myasthenia gravis (QMG) score was defined as the primary outcome parameter. Differences between groups were determined in an optimal full propensity score matching model. RESULTS Both groups were comparable in terms of clinical and demographic characteristics. Eculizumab was associated with a better outcome compared with rituximab, as measured by the change of the QMG score at 12 and 24 months of treatment. Minimal manifestation of disease was more frequently achieved in eculizumab-treated patients than rituximab-treated patients at 12 and 24 months after baseline. However, the risk of myasthenic crisis (MC) was not ameliorated in either group. INTERPRETATION This retrospective, observational study provides the first real-world evidence supporting the use of eculizumab for the treatment of refractory, anti-AChR-ab positive MG. Nonetheless, the risk of MC remained high and prompts the need for intensified monitoring and further research effort aimed at this vulnerable patient cohort.
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Affiliation(s)
- Christopher Nelke
- Department of Neurology, Heinrich Heine University Düsseldorf, Dusseldorf, Germany
| | | | - Frauke Stascheit
- Department of Neurology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany.,NeuroCure Clinical Research Center, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Marc Pawlitzki
- Department of Neurology, Heinrich Heine University Düsseldorf, Dusseldorf, Germany.,Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster, Germany
| | - Liesa Regner-Nelke
- Department of Neurology, Heinrich Heine University Düsseldorf, Dusseldorf, Germany
| | - Niklas Huntemann
- Department of Neurology, Heinrich Heine University Düsseldorf, Dusseldorf, Germany
| | - Ercan Arat
- Department of Neurology, Heinrich Heine University Düsseldorf, Dusseldorf, Germany
| | - Menekse Öztürk
- Department of Neurology, Heinrich Heine University Düsseldorf, Dusseldorf, Germany
| | - Nico Melzer
- Department of Neurology, Heinrich Heine University Düsseldorf, Dusseldorf, Germany
| | - Philipp Mergenthaler
- Department of Neurology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany.,NeuroCure Clinical Research Center, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Asmae Gassa
- Department of Cardiothoracic Surgery, University Hospital Cologne, Koln, Germany
| | - Henning Stetefeld
- Departement of Neurology, Uniklinik Koln, Koln, Nordrhein-Westfalen, Germany
| | | | - Benjamin Berger
- Department of Neurology and Neurophysiology, University Hospital Freiburg, Freiburg, Germany
| | - Andreas Totzeck
- Department of Neurology, University Hospital Essen, Essen, Germany
| | - Tim Hagenacker
- Department of Neurology, University Hospital Essen, Essen, Germany
| | - Stefanie Schreiber
- Department of Neurology, Otto-von-Guericke University, Magdeburg, Germany
| | - Stefan Vielhaber
- Otto von Guericke Universität Magdeburg, Magdeburg, Sachsen-Anhalt, Germany
| | - Hans-Peter Hartung
- Department of Neurology, Heinrich Heine University Düsseldorf, Dusseldorf, Germany
| | - Andreas Meisel
- Department of Neurology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany.,NeuroCure Clinical Research Center, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany.,Center for Stroke Research Berlin, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Heinz Wiendl
- Department of Neurology - Inflammatory Disorders of the Nervous System and Neurooncology, University of Münster, Münster, Germany
| | - Sven G Meuth
- Department of Neurology, Heinrich Heine University Düsseldorf, Dusseldorf, Germany
| | - Tobias Ruck
- Department of Neurology, Heinrich Heine University Düsseldorf, Dusseldorf, Germany
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Nelke C, Stascheit F, Eckert C, Pawlitzki M, Schroeter CB, Huntemann N, Mergenthaler P, Arat E, Öztürk M, Foell D, Schreiber S, Vielhaber S, Gassa A, Stetefeld H, Schroeter M, Berger B, Totzeck A, Hagenacker T, Meuth SG, Meisel A, Wiendl H, Ruck T. Independent risk factors for myasthenic crisis and disease exacerbation in a retrospective cohort of myasthenia gravis patients. J Neuroinflammation 2022; 19:89. [PMID: 35413850 PMCID: PMC9005160 DOI: 10.1186/s12974-022-02448-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [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: 12/06/2021] [Accepted: 03/29/2022] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Myasthenic crisis (MC) and disease exacerbation in myasthenia gravis (MG) are associated with significant lethality and continue to impose a high disease burden on affected patients. Therefore, we sought to determine potential predictors for MC and exacerbation as well as to identify factors affecting outcome. METHODS We examined a retrospective, observational cohort study of patients diagnosed with MG between 2000 and 2021 with a mean follow-up of 62.6 months after diagnosis from eight tertiary hospitals in Germany. A multivariate Cox regression model with follow-up duration as the time variable was used to determine independent risk factors for MC and disease exacerbation. RESULTS 815 patients diagnosed with MG according to national guidelines were included. Disease severity at diagnosis (quantitative MG score or Myasthenia Gravis Foundation of America class), the presence of thymoma and anti-muscle specific tyrosine kinase-antibodies were independent predictors of MC or disease exacerbation. Patients with minimal manifestation status 12 months after diagnosis had a lower risk of MC and disease exacerbation than those without. The timespan between diagnosis and the start of immunosuppressive therapy did not affect risk. Patients with a worse outcome of MC were older, had higher MGFA class before MC and at admission, and had lower vital capacity before and at admission. The number of comorbidities, requirement for intubation, prolonged mechanical ventilation, and MC triggered by infection were associated with worse outcome. No differences between outcomes were observed comparing treatments with IVIG (intravenous immunoglobulin) vs. plasma exchange vs. IVIG together with plasma exchange. CONCLUSIONS MC and disease exacerbations inflict a substantial burden of disease on MG patients. Disease severity at diagnosis and antibody status predicted the occurrence of MC and disease exacerbation. Intensified monitoring with emphasis on the prevention of infectious complications could be of value to prevent uncontrolled disease in MG patients.
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Affiliation(s)
- Christopher Nelke
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Moorenstraße 5, 40225, Duesseldorf, Germany.,Department of Neurology with Institute of Translational Neurology, University and University Hospital Münster, Munster, Germany
| | - Frauke Stascheit
- Charité, Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Department of Neurology With Experimental Neurology, Humboldt-Universität zu Berlin, Berlin, Germany.,Charité, Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, NeuroCure Clinical Research Center, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Carmen Eckert
- Department of Neurology with Institute of Translational Neurology, University and University Hospital Münster, Munster, Germany
| | - Marc Pawlitzki
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Moorenstraße 5, 40225, Duesseldorf, Germany.,Department of Child and Adolescent Psychiatry and Psychotherapy, University Hospital Münster, Munster, Germany
| | - Christina B Schroeter
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Moorenstraße 5, 40225, Duesseldorf, Germany
| | - Niklas Huntemann
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Moorenstraße 5, 40225, Duesseldorf, Germany
| | - Philipp Mergenthaler
- Charité, Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Department of Neurology With Experimental Neurology, Humboldt-Universität zu Berlin, Berlin, Germany.,Charité, Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, NeuroCure Clinical Research Center, Humboldt-Universität zu Berlin, Berlin, Germany.,Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Ercan Arat
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Moorenstraße 5, 40225, Duesseldorf, Germany
| | - Menekse Öztürk
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Moorenstraße 5, 40225, Duesseldorf, Germany
| | - Dirk Foell
- Department for Pediatric Rheumatology and Immunology, University of Münster, Munster, Germany
| | - Stefanie Schreiber
- Department of Neurology, University of Magdeburg, Magdeburg, Germany.,German Center for Neurodegenerative Diseases, Bonn, Germany.,Center for Behavioral Brain Sciences, Magdeburg, Germany
| | - Stefan Vielhaber
- Department of Neurology, University of Magdeburg, Magdeburg, Germany.,German Center for Neurodegenerative Diseases, Bonn, Germany.,Center for Behavioral Brain Sciences, Magdeburg, Germany
| | - Asmae Gassa
- Department of Cardiothoracic Surgery, University of Cologne and University Hospital Cologne, Cologne, Germany
| | - Henning Stetefeld
- Department of Neurology, University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany
| | - Michael Schroeter
- Department of Neurology, University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany
| | - Benjamin Berger
- Clinic of Neurology and Neurophysiology, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Andreas Totzeck
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Tim Hagenacker
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Sven G Meuth
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Moorenstraße 5, 40225, Duesseldorf, Germany
| | - Andreas Meisel
- Charité, Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Department of Neurology With Experimental Neurology, Humboldt-Universität zu Berlin, Berlin, Germany.,Charité, Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, NeuroCure Clinical Research Center, Humboldt-Universität zu Berlin, Berlin, Germany.,Charité, Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Center for Stroke Research Berlin, Humboldt-Universität zu Berlin, Berlin, Germany.,German Myasthenia Gravis Society, Berlin, Germany
| | - Heinz Wiendl
- Department of Neurology with Institute of Translational Neurology, University and University Hospital Münster, Munster, Germany
| | - Tobias Ruck
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Moorenstraße 5, 40225, Duesseldorf, Germany. .,Department of Neurology with Institute of Translational Neurology, University and University Hospital Münster, Munster, Germany.
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Öztürk M, Yalçın O, Tekgündüz C, Tekgündüz E. Origin of the effects of optical spectrum and flow behaviour in determining the quality of dry fig, jujube, pomegranate, date palm and concentrated grape vinegars. Spectrochim Acta A Mol Biomol Spectrosc 2022; 270:120792. [PMID: 34990917 DOI: 10.1016/j.saa.2021.120792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 12/08/2021] [Accepted: 12/19/2021] [Indexed: 06/14/2023]
Abstract
In this study, we focused on physical characterization and quality control of dry fig, jujube, pomegranate, date palm and concentrated grape vinegars using UV spectroscopy method and rheology technique. The optical spectra and flow behaviour of the vinegars were analysed in detail in the selected specific wavelength, shear rate and frequency ranges, respectively. It was determined that the peak values seen in the UV spectra of the vinegars were caused by the organic acid and phenolic compound concentration. The peak values in the UV spectra of the vinegars wavelength range of 190 nm to 240 nm and 250 nm to 300 nm were caused by the organic acid and phenolic compound concentration, respectively. In this context, it was predicted that concentrated grape vinegar, which has the highest absorbance value, has higher organic acid content and more antibacterial/antioxidant properties compared to the others. It is thought that the optical energy gaps of vinegars are related to the organic acid concentration and the release time. Flow properties of the vinegars were non-Newtonian thickening fluids (dilatant fluids) and compatible with the Power law model. The stable flow of the vinegars in the high shear rate region was interpreted as having a successful production process and being of good quality.
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Affiliation(s)
- M Öztürk
- Program of Opticianry, Niğde Ömer Halisdemir University, 51200 Niğde, Turkey.
| | - O Yalçın
- Department of Physics, Niğde Ömer Halisdemir University, 51240 Niğde, Turkey
| | - C Tekgündüz
- İçmeli Natural Products/ Nahita Company, 51240 Niğde, Turkey
| | - E Tekgündüz
- İçmeli Natural Products/ Nahita Company, 51240 Niğde, Turkey
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Okutan M, Coşkun R, Öztürk M, Yalçın O, Toker C. Equivalent circuit properties of organic food extracts doped hydrogels and their applications in bioelectronics. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116401] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Kamer S, Öztürk M, Ataseven E, Öniz H, Kadıoglu B, Balcı B, Kizmazoglu D, Kantar M, ANACAK Y. PD-0922 Neoadjuvant Chemotherapy, Radiotherapy and Interferon-β in Paediatric Nasopharyngeal Cancers. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)07201-7] [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: 11/28/2022]
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Kamer S, Öztürk M, Ataseven E, Balci B, Kadioglu B, Kantar M, Kizmazoglu D, Anacak Y. PO-1430 Radiotherapy in Pediatric Rhabdomyosarcoma: Validity of IRS Risk Classification for a Single Center. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)07881-6] [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: 10/20/2022]
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Öztürk M, Ingenwerth M, Sager M, von Gall C, Ali AAH. Does a Red House Affect Rhythms in Mice with a Corrupted Circadian System? Int J Mol Sci 2021; 22:2288. [PMID: 33669004 PMCID: PMC7956239 DOI: 10.3390/ijms22052288] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 02/12/2021] [Accepted: 02/24/2021] [Indexed: 02/05/2023] Open
Abstract
The circadian rhythms of body functions in mammals are controlled by the circadian system. The suprachiasmatic nucleus (SCN) in the hypothalamus orchestrates subordinate oscillators. Time information is conveyed from the retina to the SCN to coordinate an organism's physiology and behavior with the light/dark cycle. At the cellular level, molecular clockwork composed of interlocked transcriptional/translational feedback loops of clock genes drives rhythmic gene expression. Mice with targeted deletion of the essential clock gene Bmal1 (Bmal1-/-) have an impaired light input pathway into the circadian system and show a loss of circadian rhythms. The red house (RH) is an animal welfare measure widely used for rodents as a hiding place. Red plastic provides light at a low irradiance and long wavelength-conditions which affect the circadian system. It is not known yet whether the RH affects rhythmic behavior in mice with a corrupted circadian system. Here, we analyzed whether the RH affects spontaneous locomotor activity in Bmal1-/- mice under standard laboratory light conditions. In addition, mPER1- and p-ERK-immunoreactions, as markers for rhythmic SCN neuronal activity, and day/night plasma corticosterone levels were evaluated. Our findings indicate that application of the RH to Bmal1-/- abolishes rhythmic locomotor behavior and dampens rhythmic SCN neuronal activity. However, RH had no effect on the day/night difference in corticosterone levels.
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Affiliation(s)
- Menekse Öztürk
- Institute for Anatomy II, Medical Faculty, Heinrich-Heine-University, Moorenstrasse 5, 40225 Dusseldorf, Germany; (M.Ö.); (M.I.); (A.A.H.A.)
| | - Marc Ingenwerth
- Institute for Anatomy II, Medical Faculty, Heinrich-Heine-University, Moorenstrasse 5, 40225 Dusseldorf, Germany; (M.Ö.); (M.I.); (A.A.H.A.)
- Institute of Pathology, Medical Faculty, University Duisburg-Essen, Hufelandstrasse 55, 45147 Essen, Germany
| | - Martin Sager
- Central Institute for Animal Research and Animal Protection (ZETT), Medical Faculty, Heinrich Heine University, Moorenstrasse 5, 40225 Dusseldorf, Germany;
| | - Charlotte von Gall
- Institute for Anatomy II, Medical Faculty, Heinrich-Heine-University, Moorenstrasse 5, 40225 Dusseldorf, Germany; (M.Ö.); (M.I.); (A.A.H.A.)
| | - Amira A. H. Ali
- Institute for Anatomy II, Medical Faculty, Heinrich-Heine-University, Moorenstrasse 5, 40225 Dusseldorf, Germany; (M.Ö.); (M.I.); (A.A.H.A.)
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Yalçın O, Tekgündüz C, Öztürk M, Tekgündüz E. Investigation of the traditional organic vinegars by UV-VIS spectroscopy and rheology techniques. Spectrochim Acta A Mol Biomol Spectrosc 2021; 246:118987. [PMID: 33032119 DOI: 10.1016/j.saa.2020.118987] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 09/13/2020] [Accepted: 09/20/2020] [Indexed: 06/11/2023]
Abstract
Optical, rheological and metabolic properties of the apple, hawthorn, artichoke, grape, rosehip and blackberry organic vinegar produced by deep culture method (handmade traditional method) were analysed using UV-Vis spectroscopy and rheology techniques. Flow behaviours for all samples were analysed in the shear rate range of 10-3 to 103 1/s and in frequency range of 10-3 to 103rad/s, respectively. Absorption spectra for six organic vinegars was observed two peaks around 215 and 285nm due to the presence of phenolic compounds and organic acids such as acetic. The effects of optical transitions of organic molecules on the absorption coefficient values for vinegars were determined. Optical energy band gaps of all samples were found to be consistent with Planck's radiation approach known as Rayleigh-Jeans law and Tauc law. The rheological/flow properties of the all vinegars were found to be relevant with non-Newtonian flow behaviour and Ostwald-de Waele model. From the results of optical and rheological analysis, which determines the quantity and quality characteristics of all organic vinegars, it was concluded that these vinegars are in a level that people can drink easily.
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Affiliation(s)
- O Yalçın
- Department of Physics, Niğde Ömer Halisdemir University, 51240 Niğde, Turkey.
| | - C Tekgündüz
- İçmeli Natural Products/Nahita Company, 51240 Niğde, Turkey
| | - M Öztürk
- Program of Opticianry, Niğde Ömer Halisdemir University, 51240 Niğde, Turkey
| | - E Tekgündüz
- İçmeli Natural Products/Nahita Company, 51240 Niğde, Turkey
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Öztürk M, Okutan M, Coşkun R, Çolak B, Yalçın O. Evaluation of the effect of dose change of Fe3O4 nanoparticles on electrochemical biosensor compatibility using hydrogels as an experimental living organism model. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114574] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Bozkurt E, Sıcak Y, Oruç-Emre EE, Iyidoğan AK, Öztürk M. Design and Bioevaluation of Novel Hydrazide-Hydrazones Derived from 4-Acetyl-N-Substituted Benzenesulfonamide. Russ J Bioorg Chem 2020. [DOI: 10.1134/s1068162020050052] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Coşkun R, Okutan M, Öztürk M, Yalçın O. Experimental model to describe the dielectric response of different dye and nanoparticles doped hydrogels for biological cell membranes and biological systems. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.112072] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Akıner M, Öztürk M, Başer A, Gunay F, Emanet N, Alten B, Linton YM, Ergünay K. Ongoing activity of invasive aedes species in Northern Anatolia: lack of Chikungunya despite West Nile virus circulation. Int J Infect Dis 2019. [DOI: 10.1016/j.ijid.2018.11.219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Ünlü S, Doğan M, Kapicioğlu Y, Kamişli S, Öner S, Yildirim IO, Öztürk M. CSF flow patterns in the brain in patients with neuro-Behçet disease and Behçet disease. Eur Rev Med Pharmacol Sci 2017; 21:3906-3910. [PMID: 28975972] [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: 06/07/2023]
Abstract
OBJECTIVE In the etiopathogenesis of Behcet disease (BD) and Neuro-Behcet disease (NBD), vascular eclipse occurs in both the arteries and veins. The disease affects all vascular structures. The present study evaluates the use of Phase Contrast (PC) Cerebral Spinal Fluid (CSF) Flow Magnetic Resonance Imaging (MRI), a non-invasive technique for measuring CSF dynamics, for determining the level of aqueducts that are influenced in BD and NBD. PATIENTS AND METHODS The quantitative evaluation of CSF flow in BD and NBD was performed using images obtained at the level of the cerebral aqueduct on the semi-axial plane. The PC-MRI angiography technique was used. RESULTS There is no distinctive difference between BD and NBD that can be distinguished by the aqueduct diameters of both conditions. A clear increase in aqueduct diameter occurred BD and NBD group when compared to the control group. While there were no differences found between the BD group and the control group regarding peak velocity, average velocity, forward flow, reverse flow, net forward flow, and flow, there were distinctive increases in these various factors in the NBD group. CONCLUSIONS Using the non-invasive PC-MRI technique, this study found that in BD and NBD patients, changes occurred in CSF flow figures. Increases in CSF parameters were also observed in NBD patients, a finding which may be helpful for future distinction between BD and NBD during diagnosis.
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Affiliation(s)
- S Ünlü
- Department of Radiology. Malatya Public Hospital, Malatya, Turkey.
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Aydın-Önen S, Öztürk M. Investigation of heavy metal pollution in eastern Aegean Sea coastal waters by using Cystoseira barbata, Patella caerulea, and Liza aurata as biological indicators. Environ Sci Pollut Res Int 2017; 24:7310-7334. [PMID: 28105592 DOI: 10.1007/s11356-016-8226-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Accepted: 12/08/2016] [Indexed: 06/06/2023]
Abstract
In order to have an extensive contamination profile of heavy metal levels (Cd, Cu, Fe, Mn, Ni, Pb, and Zn), seawater, sediment, Patella caerulea, Cystoseira barbata, and Liza aurata were investigated by using inductively coupled plasma-atomic emission spectrometry (ICP-AES). Samples were collected from five coastal stations along the eastern Aegean Sea coast (Turkey) on a monthly basis from July 2002 through May 2003. According to the results of this study, heavy metal levels were arranged in the following sequence: Fe > Pb > Zn > Mn > Ni > Cu > Cd for water, Fe > Cu > Mn > Ni > Zn > Pb > Cd for sediment, Fe > Zn > Mn > Pb > Ni > Cd > Cu for C. barbata, Fe > Zn > Mn > Ni > Pb > Cu > Cd for P. caerulea, and Fe > Zn > Mn > Cu > Ni > Pb > Cd for L. aurata. Moreover, positive relationships between Fe in water and Mn in water, Fe in sediment and Mn in sediment, Fe in C. barbata and Mn in C. barbata, Fe in P. caerulea and Mn in P. caerulea, and Fe in L. aurata and Mn in L. aurata may suggest that these metals could be originated from the same anthropogenic source. C. barbata represented with higher bioconcentration factor (BCF) values, especially for Fe, Mn, and Zn values. This observation may support that C. barbata can be used as an indicator species for the determinations of Fe, Mn, and Zn levels. Regarding Turkish Food Codex Regulation's residue limits, metal values in L. aurata were found to be lower than the maximum permissible levels issued by Turkish legislation and also the recommended limits set by FAO/WHO guidelines. The results of the investigation indicated that P. caerulea, L. aurata, and especially C. barbata are quantitative water-quality bioindicators and biomonitoring subjects for biologically available metal accumulation for Aegean Sea coastal waters.
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Affiliation(s)
- S Aydın-Önen
- Institute of Marine Sciences and Technology, Dokuz Eylul University, Inciralti, 35340, Izmir, Turkey.
| | - M Öztürk
- Faculty of Education, Science Education Department, Celal Bayar University, Manisa, Turkey
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17
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Güleç A, Kaçıra BK, Kütahya H, Özbiner H, Öztürk M, Solbaş ÇS, Gökmen IE. Morphometric analysis of the lumbar vertebrae in the Turkish population using three-dimensional computed tomography: correlation with sex, age, and height. Folia Morphol (Warsz) 2017; 76:433-439. [PMID: 28150271 DOI: 10.5603/fm.a2017.0005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 11/05/2016] [Accepted: 12/16/2016] [Indexed: 11/25/2022]
Abstract
BACKGROUND Morphometric measurements of lumbar vertebrae are different in European and Asian populations. Transpedicular screws are candidates for the ideal method to treat instability of lumbar vertebrae and provide very strong stabilisation. Our study reflects the variation of morphometric measurements of lumbar vertebrae in the Turkish population according to sex, age, and height. The aim of our study was to measure the transverse pedicle diameter (TPD), vertical pedicle diameter (VPD), pedicle axis length (PAL), and transverse pedicle angle (TPA) of the lumbar vertebrae, using three-dimensional computed tomography (3D-CT), and assess variations according to sex, age, and height. MATERIALS AND METHODS Prospective cohort, Therapeutic Level III, Urban Level III Trauma Centre. The study design adopted a morphometric analysis using 3D-CT of the lumbar vertebrae in the Turkish population, with variation in terms of sex, age, and height and comparison with previous studies. In 240 cases, measurements of TPC, VPD, PAL, and TPA with 3D-CT were performed on a total of 1200 lumbar vertebrae. The values at each lumbar level were compared in groups based on sex, age, and height. RESULTS The results of our study determined the normal values of TPD, VPD, PAL, and TPA of lumbar vertebrae in the Turkish population using 3D-CT. Additionally there were variations in TPD, VPD, and PAL according to sex, age, and height. TPA varied according to age, while no difference was found in terms of sex or height. CONCLUSIONS The morphometric measurements of lumbar vertebrae in the Turkish population are similar to western populations. Sex, age, and height are factors affecting reliable screw choice.
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Affiliation(s)
| | | | | | | | - M Öztürk
- Department of Radiology, Diyarbakır Children's Hospital, Diyarbakır, Turkey, Turkey.
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18
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Kapuağası A, Özcan A, Şencan İ, Aydın MA, Öztürk M, Uzundurukan Z, Elhan AH, Başar H, Kaymak Ç. OUTCOME OF LIVING KIDNEY DONORS ACCORDING TO NATIONAL DATA OF TURKISH ORGAN AND TISSUE INFORMATION SYSTEM. Intensive Care Med Exp 2015. [PMCID: PMC4797084 DOI: 10.1186/2197-425x-3-s1-a901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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19
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Özgür G, Özaydın Ş, Yıldırım M, Öztürk M, Çetin T. PP-107 CYTOMEGALOVIRUS REACTIVATION RATES AFTER HAPLOIDENTICAL HEMATOPOIETIC STEM CELL TRANSPLANTATION: SINGLE CENTER EXPERIENCE. Leuk Res 2014. [DOI: 10.1016/s0145-2126(14)70161-4] [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: 10/24/2022]
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20
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İlter A, Kırış A, Şahin M, Civan N, Bektaş H, Öztürk M, Turan O, Kangül F, Gedikli Ö, Örem C, Kutlu M. PP-335 Atrial Conduction Times and Left Atrial Mechanical Functions in Patients with Active Acromegaly. Am J Cardiol 2014. [DOI: 10.1016/j.amjcard.2014.01.365] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Yalçın O, Coşkun R, Okutan M, Öztürk M. Comparison Effects and Dielectric Properties of Different Dose Methylene-Blue-Doped Hydrogels. J Phys Chem B 2013; 117:8931-8. [DOI: 10.1021/jp402219t] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - R. Coşkun
- Department of Chemistry, Bozok University, 66500 Yozgat, Turkey
| | - M. Okutan
- Department of Physics, Yıldız Technical University, 34210 Istanbul,
Turkey
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22
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Kırış A, Kırış G, Turan O, Öztürk M, Şahin M, Ilter A, Bektaş O, Kutlu M. PP-066 RELATIONSHIP BETWEEN EPICARDIAL FAT THICKNESS AND LEFT VENTRICULAR SYNCHRONICITY IN PATIENTS WITHOUT STRUCTURAL HEART DISEASE. Int J Cardiol 2013. [DOI: 10.1016/s0167-5273(13)70270-5] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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23
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Öztürk M, Mavili E, Gorkem SB, Cagli S, Yüce I. An Unusual Cause of Dyspnea: Myelomatous Involvement of Cricoid Cartilage. Neuroradiol J 2008; 21:584-6. [DOI: 10.1177/197140090802100419] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2008] [Accepted: 05/20/2008] [Indexed: 11/16/2022] Open
Abstract
Extraosseous multiple myeloma involving the cricoid cartilage is exceedingly rare. CT is invaluable for detecting this lesion. Herein, we describe a patient with worsening dyspnea due to involvement of the cricoid cartilage with multiple myeloma. CT not only detected the lesion but also revealed additional classical lytic lesions of multiple myeloma. In patients with worsening dyspnea laryngeal involvement should be included in the differential diagnosis.
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Affiliation(s)
- M. Öztürk
- Department of Radiology, Erciyes University Medical Faculty; Kayseri, Turkey
| | - E. Mavili
- Department of Radiology, Erciyes University Medical Faculty; Kayseri, Turkey
| | - S. B Gorkem
- Department of Radiology, Erciyes University Medical Faculty; Kayseri, Turkey
| | - S. Cagli
- Department of Radiology, Erciyes University Medical Faculty; Kayseri, Turkey
| | - I. Yüce
- Department of Radiology, Erciyes University Medical Faculty; Kayseri, Turkey
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Kuzhan Dr. O, Öztürk B, Özet A, Arpaci F, Kömürcü S, Öztürk M, Kılıçlı F, Safalı M, Ataergin S. High dose chemotherapy (HDC) and autologous peripheral stem cell transplantation (APSCT) in multiple myeloma: Pre-transplant renal dysfunction is a negative predictive factor for survival. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.18025] [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: 11/20/2022] Open
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25
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Özet Sr. A, Uncu D, Kuzhan O, Arpaci F, Öztürk M, Komurcu S, Ozturk B. Evaluation of effect of oral capecitabine and oral cyclophosphamide in metastatic breast cancer patients with anhracyclin and taxan resistance. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.12028] [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: 11/20/2022] Open
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Öztürk G, Erdoğan E, Öztürk M, Cengiz N, Him A. Differential Analysis of Effect of High Glucose Level in the Development of Neuropathy in a Tissue Culture Model of Diabetes Mellitus: Role of Hyperosmolality. Exp Clin Endocrinol Diabetes 2008; 116:582-91. [DOI: 10.1055/s-2008-1065334] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Seckin NC, Sener AB, Turhan NÖ, Gökmen O, Özmen S, Öztürk M, Kaftanoglu O. P187 The effects of hormone replacement therapy on serum concentrations of lipoprotein (a), angiotensin converting enzyme and insulin in postmenopause. Maturitas 1996. [DOI: 10.1016/s0378-5122(97)81377-1] [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: 11/28/2022]
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