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Christensen PR, Hamilton VE, Mehall GL, Anwar S, Bowles H, Chase S, Farkas Z, Fisher T, Holmes A, Kubik I, Lazbin I, O’Donnell W, Ortiz C, Pelham D, Rogers S, Shamordola K, Tourville T, Woodward R. The Lucy Thermal Emission Spectrometer (L'TES) Instrument. Space Sci Rev 2023; 220:1. [PMID: 38130909 PMCID: PMC10730683 DOI: 10.1007/s11214-023-01029-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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 11/20/2023] [Indexed: 12/23/2023]
Abstract
The Lucy Thermal Emission Spectrometer (L'TES) will provide remote measurements of the thermophysical properties of the Trojan asteroids studied by the Lucy mission. L'TES is build-to-print hardware copy of the OTES instrument flown on OSIRIS-REx. It is a Fourier Transform spectrometer covering the spectral range 5.71-100 μm (1750-100 cm-1) with spectral sampling intervals of 8.64, 17.3, and 34.6 cm-1 and a 7.3-mrad field of view. The L'TES telescope is a 15.2-cm diameter Cassegrain telescope that feeds a flat-plate Michelson moving mirror mounted on a linear voice-coil motor assembly to a single uncooled deuterated l-alanine doped triglycine sulfate (DLATGS) pyroelectric detector. A significant firmware change from OTES is the ability to acquire interferograms of different length and spectral resolution with acquisition times of 0.5, 1, and 2 seconds. A single ∼0.851 μm laser diode is used in a metrology interferometer to provide precise moving mirror control and IR sampling at 772 Hz. The beamsplitter is a 38-mm diameter, 1-mm thick chemical vapor deposited diamond with an antireflection microstructure to minimize surface reflection. An internal calibration cone blackbody target, together with observations of space, provides radiometric calibration. The radiometric precision in a single spectrum is ≤2.2 × 10-8 W cm-2 sr-1 /cm-1 between 300 and 1350 cm-1. The absolute temperature error is <2 K for scene temperatures >75 K. The overall L'TES envelope size is 37.6 × 29.0 × 30.4 cm, and the mass is 6.47 kg. The power consumption is 12.6 W average. L'TES was developed by Arizona State University with AZ Space Technologies developing the electronics. L'TES was integrated, tested, and radiometrically calibrated on the Arizona State University campus in Tempe, AZ. Initial data from space have verified the instrument's radiometric and spatial performance.
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Affiliation(s)
- P. R. Christensen
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA
| | | | - G. L. Mehall
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA
| | - S. Anwar
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA
| | - H. Bowles
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA
| | - S. Chase
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA
| | - Z. Farkas
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA
| | - T. Fisher
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA
| | - A. Holmes
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA
| | - I. Kubik
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA
| | - I. Lazbin
- AZ Space Technologies, Gilbert, AZ USA
| | - W. O’Donnell
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA
| | - C. Ortiz
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA
| | - D. Pelham
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA
| | - S. Rogers
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA
| | - K. Shamordola
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA
| | - T. Tourville
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA
| | - R. Woodward
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA
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Abstract
Introduction: Most endometrial polyps represent focal hyperplasia of the endometrium. Endometrial polyps can be diagnosed by ultrasound, hysterocontrast sonography, hysterosalpingography, endometrial biopsy, and uterine curettage, but diagnostic hysteroscopy is considered the gold-standard method, with the greatest sensitivity and specificity and also with the opportunity for treatment at the same time.Study design: A retrospective study was conducted on 424 patients between 2006 and 2018. The polyps were verified during diagnostic hysteroscopy and were removed by resectoscopy or curettage. All samples underwent histological examination. The effectivity of the type of resection and the recurrence rate were evaluated.Results: The average age of the patients was 60.2 ± 9.3 years. Polyps were excised in 62.97% by resectoscopic polypectomy and in 37.03% by curettage. Malignancy was confirmed in 4.24% of cases. Histological verification of polyps was 79.4% in the resectoscopy group and 69.04% in the curettage group; the difference was significant (p < 0.01). The recurrence rate was 20.47% after resectoscopy and 27.12% following curettage.Conclusion: Hysteroscopy remains the best option and the gold-standard method among diagnostic procedures of endometrial pathology. In this study, there was a significant difference in matching hysteroscopic and histological findings in the two methods of polypectomy. The recurrence rate is also lower following resectoscopy.
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Affiliation(s)
- S Molnár
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Z Farkas
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - A Jakab
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - R Lampé
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - P Török
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
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Hartmann B, Marchi G, Alberton P, Farkas Z, Aszodi A, Roths J, Clausen-Schaumann H. Early Detection of Cartilage Degeneration: A Comparison of Histology, Fiber Bragg Grating-Based Micro-Indentation, and Atomic Force Microscopy-Based Nano-Indentation. Int J Mol Sci 2020; 21:ijms21197384. [PMID: 33036285 PMCID: PMC7582717 DOI: 10.3390/ijms21197384] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 08/31/2020] [Revised: 09/29/2020] [Accepted: 10/04/2020] [Indexed: 12/27/2022] Open
Abstract
We have determined the sensitivity and detection limit of a new fiber Bragg grating (FBG)-based optoelectronic micro-indenter for biomechanical testing of cartilage and compared the results to indentation-type atomic force microscopy (IT-AFM) and histological staining. As test samples, we used bovine articular cartilage, which was enzymatically degraded ex vivo for five minutes using different concentrations of collagenase (5, 50, 100 and 500 µg/mL) to mimic moderate extracellular matrix deterioration seen in early-stage osteoarthritis (OA). Picrosirius Red staining and polarization microscopy demonstrated gradual, concentration-dependent disorganization of the collagen fibrillar network in the superficial zone of the explants. Osteoarthritis Research Society International (OARSI) grading of histopathological changes did not discriminate between undigested and enzymatically degraded explants. IT-AFM was the most sensitive method for detecting minute changes in cartilage biomechanics induced by the lowest collagenase concentration, however, it did not distinguish different levels of cartilage degeneration for collagenase concentrations higher than 5 µg/mL. The FBG micro-indenter provided a better and more precise assessment of the level of cartilage degeneration than the OARSI histological grading system but it was less sensitive at detecting mechanical changes than IT-AFM. The FBG-sensor allowed us to observe differences in cartilage biomechanics for collagenase concentrations of 100 and 500 µg/mL. Our results confirm that the FBG sensor is capable of detecting small changes in articular cartilage stiffness, which may be associated with initial cartilage degeneration caused by early OA.
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Affiliation(s)
- Bastian Hartmann
- Center for Applied Tissue Engineering and Regenerative Medicine–CANTER, Munich University of Applied Sciences, 80335 Munich, Germany; (B.H.); (A.A.)
- Laboratory of Experimental Surgery and Regenerative Medicine (ExperiMed), Clinic for General, Trauma and Reconstructive Surgery, University of Munich, 82152 Planegg, Germany; (P.A.); (Z.F.)
- Center for Nanoscience (CeNS), University of Munich, 80331 Munich, Germany
| | - Gabriele Marchi
- Photonics Laboratory, Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences, 80335 Munich, Germany; (G.M.); (J.R.)
| | - Paolo Alberton
- Laboratory of Experimental Surgery and Regenerative Medicine (ExperiMed), Clinic for General, Trauma and Reconstructive Surgery, University of Munich, 82152 Planegg, Germany; (P.A.); (Z.F.)
| | - Zsuzsanna Farkas
- Laboratory of Experimental Surgery and Regenerative Medicine (ExperiMed), Clinic for General, Trauma and Reconstructive Surgery, University of Munich, 82152 Planegg, Germany; (P.A.); (Z.F.)
| | - Attila Aszodi
- Center for Applied Tissue Engineering and Regenerative Medicine–CANTER, Munich University of Applied Sciences, 80335 Munich, Germany; (B.H.); (A.A.)
- Laboratory of Experimental Surgery and Regenerative Medicine (ExperiMed), Clinic for General, Trauma and Reconstructive Surgery, University of Munich, 82152 Planegg, Germany; (P.A.); (Z.F.)
| | - Johannes Roths
- Photonics Laboratory, Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences, 80335 Munich, Germany; (G.M.); (J.R.)
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine–CANTER, Munich University of Applied Sciences, 80335 Munich, Germany; (B.H.); (A.A.)
- Center for Nanoscience (CeNS), University of Munich, 80331 Munich, Germany
- Correspondence: ; Tel.: +49-89-1265-1682
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Li P, Fleischhauer L, Nicolae C, Prein C, Farkas Z, Saller MM, Prall WC, Wagener R, Heilig J, Niehoff A, Clausen-Schaumann H, Alberton P, Aszodi A. Mice Lacking the Matrilin Family of Extracellular Matrix Proteins Develop Mild Skeletal Abnormalities and Are Susceptible to Age-Associated Osteoarthritis. Int J Mol Sci 2020; 21:ijms21020666. [PMID: 31963938 PMCID: PMC7013758 DOI: 10.3390/ijms21020666] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 12/12/2019] [Revised: 01/10/2020] [Accepted: 01/15/2020] [Indexed: 12/14/2022] Open
Abstract
Matrilins (MATN1, MATN2, MATN3 and MATN4) are adaptor proteins of the cartilage extracellular matrix (ECM), which bridge the collagen II and proteoglycan networks. In humans, dominant-negative mutations in MATN3 lead to various forms of mild chondrodysplasias. However, single or double matrilin knockout mice generated previously in our laboratory do not show an overt skeletal phenotype, suggesting compensation among the matrilin family members. The aim of our study was to establish a mouse line, which lacks all four matrilins and analyze the consequence of matrilin deficiency on endochondral bone formation and cartilage function. Matn1-4−/− mice were viable and fertile, and showed a lumbosacral transition phenotype characterized by the sacralization of the sixth lumbar vertebra. The development of the appendicular skeleton, the structure of the growth plate, chondrocyte differentiation, proliferation, and survival were normal in mutant mice. Biochemical analysis of knee cartilage demonstrated moderate alterations in the extractability of the binding partners of matrilins in Matn1-4−/− mice. Atomic force microscopy (AFM) revealed comparable compressive stiffness but higher collagen fiber diameters in the growth plate cartilage of quadruple mutant compared to wild-type mice. Importantly, Matn1-4−/− mice developed more severe spontaneous osteoarthritis at the age of 18 months, which was accompanied by changes in the biomechanical properties of the articular cartilage. Interestingly, Matn4−/− mice also developed age-associated osteoarthritis suggesting a crucial role of MATN4 in maintaining the stability of the articular cartilage. Collectively, our data provide evidence that matrilins are important to protect articular cartilage from deterioration and are involved in the specification of the vertebral column.
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Affiliation(s)
- Ping Li
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (P.L.); (L.F.); (C.P.); (Z.F.); (M.M.S.); (W.C.P.); (P.A.)
| | - Lutz Fleischhauer
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (P.L.); (L.F.); (C.P.); (Z.F.); (M.M.S.); (W.C.P.); (P.A.)
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80533 Munich, Germany;
- Center for NanoScience, Ludwig-Maximilians University Munich, 80799 Munich, Germany
| | - Claudia Nicolae
- Department of Molecular Medicine, Max Planck Institute for Biochemistry, 82152 Martinsried, Germany;
| | - Carina Prein
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (P.L.); (L.F.); (C.P.); (Z.F.); (M.M.S.); (W.C.P.); (P.A.)
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80533 Munich, Germany;
| | - Zsuzsanna Farkas
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (P.L.); (L.F.); (C.P.); (Z.F.); (M.M.S.); (W.C.P.); (P.A.)
| | - Maximilian Michael Saller
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (P.L.); (L.F.); (C.P.); (Z.F.); (M.M.S.); (W.C.P.); (P.A.)
| | - Wolf Christian Prall
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (P.L.); (L.F.); (C.P.); (Z.F.); (M.M.S.); (W.C.P.); (P.A.)
| | - Raimund Wagener
- Center for Molecular Medicine, University of Cologne, 50923 Cologne, Germany;
- Center for Biochemistry, Faculty of Medicine, University of Cologne, 50931 Cologne, Germany;
| | - Juliane Heilig
- Center for Biochemistry, Faculty of Medicine, University of Cologne, 50931 Cologne, Germany;
- Cologne Center for Musculoskeletal Biomechanics, Faculty of Medicine and University Hospital of Cologne, 50931 Cologne, Germany;
| | - Anja Niehoff
- Cologne Center for Musculoskeletal Biomechanics, Faculty of Medicine and University Hospital of Cologne, 50931 Cologne, Germany;
- Institute of Biomechanics and Orthopaedics, German Sport University Cologne, 50933 Cologne, Germany
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80533 Munich, Germany;
- Center for NanoScience, Ludwig-Maximilians University Munich, 80799 Munich, Germany
| | - Paolo Alberton
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (P.L.); (L.F.); (C.P.); (Z.F.); (M.M.S.); (W.C.P.); (P.A.)
| | - Attila Aszodi
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (P.L.); (L.F.); (C.P.); (Z.F.); (M.M.S.); (W.C.P.); (P.A.)
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80533 Munich, Germany;
- Correspondence: ; Tel.: +49-89-4400-55481
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Taha S, Saller MM, Haas E, Farkas Z, Aszodi A, Giunta R, Volkmer E. Adipose-derived stem/progenitor cells from lipoaspirates: A comparison between the Lipivage200-5 liposuction system and the Body-Jet liposuction system. J Plast Reconstr Aesthet Surg 2020; 73:166-175. [DOI: 10.1016/j.bjps.2019.06.025] [Citation(s) in RCA: 8] [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: 02/21/2019] [Revised: 05/28/2019] [Accepted: 06/09/2019] [Indexed: 12/13/2022]
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Teszak T, Assabiny A, Kiraly A, Tarjanyi Z, Parazs N, Szakal-Toth Z, Hartyanszky I, Szabolcs Z, Fodor A, Farkas Z, Reti M, Sax B, Merkely B. P761The effect of extracorporeal photopheresis on cardiac allograft rejection and on lymphocyte subclasses. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Cardiac allograft rejection is known to have a profound impact on graft survival and mortality after heart transplant. Previous data on the efficacy of extracorporeal photopheresis (ECP) in the management of cardiac allograft rejection is encouraging. Though, clear evidence on the exact indication and data regarding its effect on distinct lymphocyte subtypes are still lacking. Based on their cytokine production, both helper and cytotoxic T cells can differentiate into either regulatory cells participating in the suppression of rejection or into effector cells responsible for its maintenance. Regulatory T cells are essential for the termination of rejection, while B lymphocytes and natural killer (NK) cells contribute to it.
Purpose
We aimed to investigate the anti-rejection efficacy and the impact of ECP on peripheral blood lymphocyte subclasses in adult heart transplant recipients.
Methods
In a retrospective analysis of 12 consecutive patients treated with ECP for cardiac allograft rejection between 2013 and 2019, we examined the grade of rejection in endomyocardial biopsies (EMB) based on the International Society for Heart and Lung Transplantation classification. We analysed the absolute counts and the percentages of helper, cytotoxic and regulatory T cells, B lymphocytes and NK cells with fluorescence activated cell sorting. Measurements were performed both before and after the ECP treatment period. Data values were given as either mean±standard deviation or median [min–max].
Results
The patients underwent 26 [2–39] ECP treatments in addition to standard immunosuppressant therapy. Whereas grade 2R cellular rejection was detected in 83% of the cases prior to initiating ECP, none of the examined EMB specimen revealed rejection greater than grade 1R cellular rejection post ECP therapy. The average grade of cellular rejection improved significantly (1.25±0.45 vs. 0.50±0.53; p=0.022). The absolute count and the percentage of helper T cells increased significantly post ECP therapy (0.34 G/l±0.26 G/l vs. 0.51 G/l±0.39 G/l; p=0.018 and 3.43%±2.24% vs. 5.98%±3.64%; p=0.017, respectively). There was also a significant rise in the percentage of cytotoxic T cells (2.33%±1.46% vs. 4.16±2.98%; p=0.027). We noticed an almost significant twofold increase in the percentage of regulatory T cells on completion of the ECP therapy (0.20%±0.22% vs. 0.37%±0.20%; p=0.060). Neither B lymphocyte nor NK cell counts revealed any significant changes.
Conclusion
ECP was effective in reducing the severity of cardiac allograft rejection episodes. The significant decrease in rejection rates might be indicative of the predominance of anti-inflammatory helper and cytotoxic T cell subpopulations and the increase of regulatory T cell count post ECP therapy. However, discussion of the results are limited by small sample size and the effect of medical therapy on the lymphocytes.
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Affiliation(s)
- T Teszak
- Semmelweis University, Budapest, Hungary
| | - A Assabiny
- Semmelweis University, Budapest, Hungary
| | - A Kiraly
- Semmelweis University, Budapest, Hungary
| | - Z Tarjanyi
- Semmelweis University, Budapest, Hungary
| | - N Parazs
- Semmelweis University, Budapest, Hungary
| | | | | | - Z Szabolcs
- Semmelweis University, Budapest, Hungary
| | - A Fodor
- South Pest Central Hospital – National Institute for Hematology and Infectious Diseases, Budapest, Hungary
| | - Z Farkas
- South Pest Central Hospital – National Institute for Hematology and Infectious Diseases, Budapest, Hungary
| | - M Reti
- South Pest Central Hospital – National Institute for Hematology and Infectious Diseases, Budapest, Hungary
| | - B Sax
- Semmelweis University, Budapest, Hungary
| | - B Merkely
- Semmelweis University, Budapest, Hungary
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Dóczi R, Tihanyi D, Filotas P, Dirner A, Pálházi B, Várkondi E, Farkas Z, Deri J, Lengyel E, Hegedus C, Petak I. Analysis of molecular profile complexities for immunotherapy decision support. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz253.083] [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: 11/14/2022] Open
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Petak I, Hegedus C, Várkondi E, Farkas Z, Tihanyi D, Dóczi R, Mathiasz D, Lengyel E, Pajkos G, Schwab R, Deri J, Vályi-Nagy I. Introducing standardized medical procedure and dynamic decision support program in precision oncology for the community of practice. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz263.017] [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: 11/13/2022] Open
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Kovács A, Farkas Z, Kelemen A, Juhos V, Szűcs A, Kamondi A. Lamotrigine Induces Tremor among Epilepsy Patients Probably via Cerebellar Pathways. TOHOKU J EXP MED 2019; 248:273-284. [PMID: 31447473 DOI: 10.1620/tjem.248.273] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Lamotrigine, a frequently used antiepileptic drug, inhibits voltage-gated sodium-channels. By suppressing the release of glutamate and aspartate, lamotrigine acts as a membrane stabilizer, and it is also effective in bipolar disorder and migraine. However, lamotrigine is known to induce tremor among 4-10% of patients. We examined the lamotrigine-induced tremor in 28 epilepsy patients (age: 38.06 ± 13.56 years; 24 females and 4 males) receiving lamotrigine monotherapy and compared the data to 30 age- and sex-matched controls (age: 33.06 ± 10.71 years; 25 females and 5 males). Tremor was visually assessed by clinical tremor rating scales. Quantitative characteristics (intensity, center frequency and frequency dispersion) which are regularly used to differentiate various tremor syndromes were measured by validated, sensitive biaxial accelerometry in resting, postural and intentional positions. Regularity of repetitive finger and hand movements and reaction time were also determined. Data were statistically analyzed. Clinical tremor rating scales detected pathological tremor in three patients (10%), while accelerometry revealed tremor in seven patients (25%). Center frequency of patients with pathological tremor was similar to controls, but the frequency dispersion was significantly lower and tremor intensity was significantly higher in both postural and intentional positions. Rhythmic movements and reaction time were normal. Our results show that objective measurements detect pathological intention tremor in 25% of epilepsy patients receiving lamotrigine monotherapy. Quantitative characteristics suggest the involvement of the cerebellum in the pathomechanism of lamotrigine-induced tremor. Determining the parameters of drug-induced tremor syndromes might help to understand the complex action of tremor generator networks.
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Affiliation(s)
- Andrea Kovács
- Department of Neurology, National Institute of Clinical Neurosciences.,János Szentágothai Doctoral School of Neurosciences, Semmelweis University
| | | | - Anna Kelemen
- Department of Neurology, National Institute of Clinical Neurosciences
| | | | - Anna Szűcs
- Department of Neurology, National Institute of Clinical Neurosciences
| | - Anita Kamondi
- Department of Neurology, National Institute of Clinical Neurosciences.,Department of Neurology, Semmelweis University
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Alberton P, Dugonitsch HC, Hartmann B, Li P, Farkas Z, Saller MM, Clausen-Schaumann H, Aszodi A. Aggrecan Hypomorphism Compromises Articular Cartilage Biomechanical Properties and Is Associated with Increased Incidence of Spontaneous Osteoarthritis. Int J Mol Sci 2019; 20:ijms20051008. [PMID: 30813547 PMCID: PMC6429589 DOI: 10.3390/ijms20051008] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [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: 02/01/2019] [Revised: 02/18/2019] [Accepted: 02/21/2019] [Indexed: 01/02/2023] Open
Abstract
The gene encoding the proteoglycan aggrecan (Agc1) is abundantly expressed in cartilage during development and adulthood, and the loss or diminished deposition of the protein results in a wide range of skeletal malformations. Furthermore, aggrecan degradation is a hallmark of cartilage degeneration occurring in osteoarthritis. In the present study, we investigated the consequences of a partial loss of aggrecan in the postnatal skeleton and in the articular cartilage of adult mice. We took advantage of the previously described Agc1tm(IRES-CreERT2) mouse line, which allows for conditional and timely-regulated deletion of floxed, cartilage-expressed genes. As previously reported, the introduction of the CreERT2 cassette in the 3’UTR causes a disruption of the normal expression of Agc1 resulting in a hypomorphic deposition of the protein. In homozygous mice, we observed a dwarf phenotype, which persisted throughout adulthood supporting the evidence that reduced aggrecan amount impairs skeletal growth. Homozygous mice exhibited reduced proteoglycan staining of the articular cartilage at 6 and 12 months of age, increased stiffening of the extracellular matrix at six months, and developed severe cartilage erosion by 12 months. The osteoarthritis in the hypomorph mice was not accompanied by increased expression of catabolic enzymes and matrix degradation neoepitopes. These findings suggest that the degeneration found in homozygous mice is likely due to the compromised mechanical properties of the cartilage tissue upon aggrecan reduction.
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Affiliation(s)
- Paolo Alberton
- Laboratory of Experimental Surgery and Regenerative Medicine, Clinic for General, Trauma and Reconstructive Surgery, Ludwig-Maximilians University, 80336 Munich, Germany.
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80533 Munich, Germany.
| | - Hans Christian Dugonitsch
- Laboratory of Experimental Surgery and Regenerative Medicine, Clinic for General, Trauma and Reconstructive Surgery, Ludwig-Maximilians University, 80336 Munich, Germany.
| | - Bastian Hartmann
- Laboratory of Experimental Surgery and Regenerative Medicine, Clinic for General, Trauma and Reconstructive Surgery, Ludwig-Maximilians University, 80336 Munich, Germany.
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80533 Munich, Germany.
- Center for NanoScience, Ludwig-Maximilians University Munich, 80799 Munich, Germany.
| | - Ping Li
- Laboratory of Experimental Surgery and Regenerative Medicine, Clinic for General, Trauma and Reconstructive Surgery, Ludwig-Maximilians University, 80336 Munich, Germany.
| | - Zsuzsanna Farkas
- Laboratory of Experimental Surgery and Regenerative Medicine, Clinic for General, Trauma and Reconstructive Surgery, Ludwig-Maximilians University, 80336 Munich, Germany.
| | - Maximilian Michael Saller
- Laboratory of Experimental Surgery and Regenerative Medicine, Clinic for General, Trauma and Reconstructive Surgery, Ludwig-Maximilians University, 80336 Munich, Germany.
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80533 Munich, Germany.
- Center for NanoScience, Ludwig-Maximilians University Munich, 80799 Munich, Germany.
| | - Attila Aszodi
- Laboratory of Experimental Surgery and Regenerative Medicine, Clinic for General, Trauma and Reconstructive Surgery, Ludwig-Maximilians University, 80336 Munich, Germany.
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80533 Munich, Germany.
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Kovács A, Farkas Z, Gulyás S, Kárpáti J, Beke A, Kamondi A. P364 Female fragile X premutation carriers do exhibit subclinical neurological signs. Clin Neurophysiol 2017. [DOI: 10.1016/j.clinph.2017.07.372] [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: 11/30/2022]
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12
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Neuerburg C, Loer T, Mittlmeier L, Polan C, Farkas Z, Holdt LM, Utzschneider S, Schwiesau J, Grupp TM, Böcker W, Aszodi A, Wedemeyer C, Kammerlander C. Impact of vitamin E-blended UHMWPE wear particles on the osseous microenvironment in polyethylene particle-induced osteolysis. Int J Mol Med 2016; 38:1652-1660. [PMID: 27779642 PMCID: PMC5117748 DOI: 10.3892/ijmm.2016.2780] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [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: 07/05/2016] [Accepted: 09/23/2016] [Indexed: 12/29/2022] Open
Abstract
Aseptic loosening mediated by wear particle-induced osteolysis (PIO) remains the major cause of implant loosening in endoprosthetic surgery. The development of new vitamin E (α-tocopherol)-blended ultra-high molecular weight polyethylene (VE-UHMWPE) with increased oxidation resistance and improved mechanical properties has raised hopes. Furthermore, regenerative approaches may be opened, as vitamin E supplementation has shown neuroprotective characteristics mediated via calcitonin gene-related peptide (CGRP), which is known to affect bone remodeling in PIO. Therefore, the present study aimed to further clarify the impact of VE-UHMWPE wear particles on the osseous microenvironment and to identify the potential modulatory pathways involved. Using an established murine calvaria model, mice were subjected to sham operation (SHAM group), or treated with UHMWPE or VE-UHMWPE particles for different experimental durations (7, 14 and 28 days; n=6/group). Morphometric analysis by micro-computed tomography detected significant (p<0.01) and comparable signs of PIO in all particle-treated groups, whereas markers of inflammation [tumor necrosis factor (TNF)-α/tartrate resistant acid phosphatase (TRAP) staining] and bone remodeling [Dickkopf-related protein 1 (DKK-1)/osteoprotegerin (OPG)] were most affected in the early stages following surgery. Taking the present data into account, VE-UHMWPE appears to have a promising biocompatibility and increased ageing resistance. According to the α-CGRP serum levels and immunohistochemistry, the impact of vitamin E on neuropeptidergic signaling and its chance for regenerative approaches requires further investigation.
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Affiliation(s)
- Carl Neuerburg
- Experimental Surgery and Regenerative Medicine, Department of General, Trauma and Reconstructive Surgery, Munich University Hospital LMU, Munich, Germany
| | - Theresa Loer
- Department of Orthopedics and Trauma Surgery, University Hospital, University of Duisburg-Essen, Essen, Germany
| | - Lena Mittlmeier
- Experimental Surgery and Regenerative Medicine, Department of General, Trauma and Reconstructive Surgery, Munich University Hospital LMU, Munich, Germany
| | - Christina Polan
- Department of Orthopedics and Trauma Surgery, University Hospital, University of Duisburg-Essen, Essen, Germany
| | - Zsuzsanna Farkas
- Experimental Surgery and Regenerative Medicine, Department of General, Trauma and Reconstructive Surgery, Munich University Hospital LMU, Munich, Germany
| | - Lesca Miriam Holdt
- Institute of Laboratory Medicine, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Sandra Utzschneider
- Department of Orthopaedic Surgery, Physical Medicine and Rehabilitation, Munich University Hospital LMU, Munich, Germany
| | - Jens Schwiesau
- Department of Orthopaedic Surgery, Physical Medicine and Rehabilitation, Munich University Hospital LMU, Munich, Germany
| | - Thomas M Grupp
- Department of Orthopaedic Surgery, Physical Medicine and Rehabilitation, Munich University Hospital LMU, Munich, Germany
| | - Wolfgang Böcker
- Experimental Surgery and Regenerative Medicine, Department of General, Trauma and Reconstructive Surgery, Munich University Hospital LMU, Munich, Germany
| | - Attila Aszodi
- Experimental Surgery and Regenerative Medicine, Department of General, Trauma and Reconstructive Surgery, Munich University Hospital LMU, Munich, Germany
| | - Christian Wedemeyer
- KKEL St. Barbara Hospital, Department of Orthopedics and Trauma Surgery, Gladbeck, Germany
| | - Christian Kammerlander
- Experimental Surgery and Regenerative Medicine, Department of General, Trauma and Reconstructive Surgery, Munich University Hospital LMU, Munich, Germany
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13
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Aszalos C, Dongó E, Farkas Z, Kollár A, Magyar P, Várallyay G, Bereczki D, Vastagh I. [Cerebral manifestations of thromboangiitis obliterans. Case report]. Orv Hetil 2016; 157:1207-11. [PMID: 27452071 DOI: 10.1556/650.2016.30476] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Thromboangiits obliterans (Buerger's disease) is a non-atherosclerotic, segmental inflammatory and obliterative disease affecting small and medium sized arteries and veins. The etiology is still unknown, but it is in close relationship with tobacco use. Symptoms begin under the age of 45 years and the undulating course is typical. Patients usually present with acute and chronic ischemic or infectious acral lesions. Diagnosis is usually based on clinical and angiographic criteria and it is important to exclude autoimmune disease, thrombophilia, diabetes, and proximal embolic sources. Even though Buerger's disease most commonly involves the arteries of the extremities, the pathologic findings sometimes affect the cerebral, coronary and internal thoracic, renal and mesenteric arteries as well. The authors present the history of a patient with known Buerger's disease and acute ischemic stroke. Brain imaging detected acute and chronic ischemic lesions caused by middle cerebral non-atherosclerotic arteriopathy on the symptomatic side. Other etiology was excluded by detailed investigations. Orv. Hetil., 2016, 157(30), 1207-1211.
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Affiliation(s)
- Csongor Aszalos
- Marosvásárhelyi Orvosi és Gyógyszerészeti Egyetem Marosvásárhely
| | - Eleni Dongó
- Neurológiai Klinika, Semmelweis Egyetem, Általános Orvostudományi Kar Budapest, Balassa u. 6., 1083
| | - Zsuzsanna Farkas
- Neurológiai Klinika, Semmelweis Egyetem, Általános Orvostudományi Kar Budapest, Balassa u. 6., 1083
| | - Attila Kollár
- Radiológiai és Onkoterápiás Klinika, Semmelweis Egyetem, Általános Orvostudományi Kar Budapest
| | - Péter Magyar
- Radiológiai és Onkoterápiás Klinika, Semmelweis Egyetem, Általános Orvostudományi Kar Budapest
| | | | - Dániel Bereczki
- Neurológiai Klinika, Semmelweis Egyetem, Általános Orvostudományi Kar Budapest, Balassa u. 6., 1083
| | - Ildikó Vastagh
- Neurológiai Klinika, Semmelweis Egyetem, Általános Orvostudományi Kar Budapest, Balassa u. 6., 1083
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14
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Kovács A, Farkas Z, Horváth A, Kelemen A, Barcs G, Szűcs A, Fabó D, Kamondi A. ID 87 – Quantitative analysis of tremor and motor performance in epilepsy patients treated with various. Clin Neurophysiol 2016. [DOI: 10.1016/j.clinph.2015.11.278] [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: 11/30/2022]
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Prein C, Warmbold N, Farkas Z, Schieker M, Aszodi A, Clausen-Schaumann H. Structural and mechanical properties of the proliferative zone of the developing murine growth plate cartilage assessed by atomic force microscopy. Matrix Biol 2016; 50:1-15. [DOI: 10.1016/j.matbio.2015.10.001] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Revised: 09/25/2015] [Accepted: 10/06/2015] [Indexed: 12/13/2022]
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Kamper M, Hamann N, Prein C, Clausen-Schaumann H, Farkas Z, Aszodi A, Niehoff A, Paulsson M, Zaucke F. Early changes in morphology, bone mineral density and matrix composition of vertebrae lead to disc degeneration in aged collagen IX −/− mice. Matrix Biol 2016; 49:132-143. [DOI: 10.1016/j.matbio.2015.09.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 09/25/2015] [Accepted: 09/26/2015] [Indexed: 01/26/2023]
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17
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Shwartz Y, Farkas Z, Stern T, Aszódi A, Zelzer E. Muscle contraction controls skeletal morphogenesis through regulation of chondrocyte convergent extension. Dev Biol 2012; 370:154-63. [PMID: 22884393 DOI: 10.1016/j.ydbio.2012.07.026] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 07/23/2012] [Accepted: 07/25/2012] [Indexed: 02/01/2023]
Abstract
Convergent extension driven by mediolateral intercalation of chondrocytes is a key process that contributes to skeletal growth and morphogenesis. While progress has been made in deciphering the molecular mechanism that underlies this process, the involvement of mechanical load exerted by muscle contraction in its regulation has not been studied. Using the zebrafish as a model system, we found abnormal pharyngeal cartilage morphology in both chemically and genetically paralyzed embryos, demonstrating the importance of muscle contraction for zebrafish skeletal development. The shortening of skeletal elements was accompanied by prominent changes in cell morphology and organization. While in control the cells were elongated, chondrocytes in paralyzed zebrafish were smaller and exhibited a more rounded shape, confirmed by a reduction in their length-to-width ratio. The typical columnar organization of cells was affected too, as chondrocytes in various skeletal elements exhibited abnormal stacking patterns, indicating aberrant intercalation. Finally, we demonstrate impaired chondrocyte intercalation in growth plates of muscle-less Sp(d) mouse embryos, implying the evolutionary conservation of muscle force regulation of this essential morphogenetic process.Our findings provide a new perspective on the regulatory interaction between muscle contraction and skeletal morphogenesis by uncovering the role of muscle-induced mechanical loads in regulating chondrocyte intercalation in two different vertebrate models.
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Affiliation(s)
- Yulia Shwartz
- Department of Molecular Genetics, Weizmann Institute of Science, PO Box 26, Rehovot 76100, Israel
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18
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Farkas Z, Márki-Zay J, Kucsera J, Vágvölgyi C, Golubev WI, Pfeiffer I. Characterization of two different toxins of Wickerhamomyces anomalus (Pichia anomala) VKM Y-159. Acta Biol Hung 2012; 63:277-87. [PMID: 22695525 DOI: 10.1556/abiol.63.2012.2.9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [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
Wickerhamomyces anomalus VKM Y-159 strain produces two types of toxin designated as WAKT a and WAKT b, encoded by chromosomal genes. The WAKT a toxin is heat-labile, pronase sensitive acting in pH range 3-4 affecting on several yeasts including pathogenic Candida species while the WAKT b toxin is protease- and thermo-resistant, acting in pH range 3-7 on two species, Candida alai and Candida norvegica. The rapid decrease of the number of viable cells after toxin treatment demonstrates that both toxins have cytocidic effect.
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Affiliation(s)
- Z Farkas
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary
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19
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Marković Z, Todorović-Marković B, Mohai I, Farkas Z, Kovats E, Szepvolgyi J, Otasević D, Scheier P, Feil S, Romcević N. Comparative process analysis of fullerene production by the arc and the radio-frequency discharge methods. J Nanosci Nanotechnol 2007; 7:1357-69. [PMID: 17450899 DOI: 10.1166/jnn.2007.315] [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] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
In this work, comparative analysis of processes in carbon arc and radio frequency (RF) plasma during fullerene synthesis has been presented. The kinetic model of fullerene formation developed earlier has been verified in both types of plasma reactors. The fullerene yield depended on carbon concentration, velocity of plasma flame and rotational temperature of C2 radicals predominantly. When mean rotational temperature of C2 radicals was 3000 K, the fullerene yield was the highest regardless of the type of used reactor. The zone of fullerene formation is larger significantly in RF plasma reactor compared to arc reactor.
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Affiliation(s)
- Z Marković
- Vinca" Institute of Nuclear Sciences, P. O. Box 522, 11001 Belgrade, Serbia
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20
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Várallyay G, Benyó Z, Illényi A, Farkas Z, Kovács L. Acoustic analysis of the infant cry: classical and new methods. Conf Proc IEEE Eng Med Biol Soc 2007; 2006:313-6. [PMID: 17271673 DOI: 10.1109/iembs.2004.1403155] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
In the last few decades many papers have written about the analysis of the infant cry. The acoustic analysis has a shorter history than emotional, physiological, etc. investigations [1, 2, 3, 4, 5]. This paper deals with classical and new methods of acoustic analysis of the infant cry. The final goal is to detect hearing disorders according to the crying at the earliest possible moment. Classical acoustic methods were reproduced and compared with solutions, which were not available before. This paper most of all deals with the characteristics of the fundamental frequency of the cry in the time and in the frequency domain.
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Affiliation(s)
- G Várallyay
- Dept. of Control Eng. & Information Technol., Budapest University of Technology and Economics, Hungary
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21
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Farkas Z, Csillik A, Pálvölgyi L, Takács A, Szirmai I, Kamondi A. [Complex tremor analysis for the differential diagnosis of essential tremor and Parkinson's disease]. Ideggyogy Sz 2006; 59:45-54. [PMID: 16491571] [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: 05/06/2023]
Abstract
OBJECTIVE Tremor is the most common movement disorder which is most often either essential or caused by Parkinson's disease. The differentiation of these disorders at the initial stage may be difficult. Objective assessment of the efficacy of tremor medications is only possible by instrumental measurements. The aim of this study was to determine whether the computer assisted tremor analysis system CATSYS 2000 can help in the differentiation of parkinsonian from essential tremor. METHODS The rhythmicity and maximal frequency of fast alternating hand and finger movements, simple reaction time and postural instability were recorded in healthy controls (n = 18), patients with Parkinson's disease (n = 39) and essential tremor (n = 37). Data were digitally converted and statistically analyzed. RESULTS Tremor intensity, median frequency and frequency distribution showed characteristic differences in the three groups. Performance in fast alternating movements of hands and fingers were significantly worse in both tremor groups compared to the healthy controls. CONCLUSIONS The data also indicated that quantitative measurements of tremor parameters must be performed on both sides, because the presence of significant side differences support the diagnosis of Parkinson's disease. The method presented can be used to objectively analyze tremor and performance in rhythmic movements. The results show that it helps to differentiate parkinsonian from essential tremor as well as to predict disease course and the effectiveness of therapy. Multivariate statistical analysis of tremor and movement performance also provides an opportunity to study the pathogenesis of human tremor.
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Affiliation(s)
- Zsuzsanna Farkas
- Semmelweis Egyetem, Altalános Orvostudományi Kar, Neurológiai Klinika, Budapest
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22
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Abstract
It has been suggested that the cerebellum plays a role in the event-based timing of synchronized repetitive movements. We hypothesized that regularity of rhythmic movements in essential tremor (ET) is impaired, since several lines of evidence suggest the involvement of the cerebellum in the pathomechanism of ET. To test this assumption, we examined the regularity and the maximum frequency of auditory paced repetitive movements at slow and fast stimulus rate in 34 ET patients. Variability of rhythmic finger tapping and alternating hand movements, defined by the standard deviation of movement offset before or after the pacing signal, was significantly higher compared to healthy controls. Timing of rhythmic movements of the two hands was disturbed to the same degree. Our results suggest a severe deficit of event-based rhythm generation on both sides in ET, supporting the presumed bilateral cerebellar dysfunction in this disorder.
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Affiliation(s)
- Zsuzsanna Farkas
- Department of Neurology, Semmelweis University, Budapest, Hungary
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23
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Farkas Z, Csillik A, Szirmai I, Kamondi A. Asymmetry of tremor intensity and frequency in Parkinson's disease and essential tremor. Parkinsonism Relat Disord 2005; 12:49-55. [PMID: 16271493 DOI: 10.1016/j.parkreldis.2005.07.008] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [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: 01/14/2005] [Revised: 06/28/2005] [Accepted: 07/25/2005] [Indexed: 11/17/2022]
Abstract
We investigated the asymmetry of tremor intensity, frequency and frequency dispersion of Parkinsonian (PT) and essential (ET) tremor using accelerometry. Data of the more and less trembling hands were statistically elaborated. We found that tremor intensity was significantly asymmetric not only in PT but also in ET, while frequency and frequency dispersion were symmetric in ET but asymmetric in PT. We conclude that bilateral assessment of frequency related tremor parameters may be used for differentiation between ET and PT, and provides further details on the central organization of tremor generators.
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Affiliation(s)
- Zsuzsanna Farkas
- Department of Neurology, Semmelweis University, Balassa u. 6., 1083 Budapest, Hungary
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25
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26
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Farkas Z, Tegzes P, Vukics A, Vicsek T. Transitions in the horizontal transport of vertically vibrated granular layers. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1999; 60:7022-31. [PMID: 11970641 DOI: 10.1103/physreve.60.7022] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/1999] [Indexed: 04/18/2023]
Abstract
Motivated by recent advances in the investigation of fluctuation-driven ratchets and flows in excited granular media, we have carried out experimental and simulational studies to explore the horizontal transport of granular particles in a vertically vibrated system whose base has a sawtooth-shaped profile. The resulting material flow exhibits novel collective behavior, both as a function of the number of layers of particles and the driving frequency; in particular, under certain conditions, increasing the layer thickness leads to a reversal of the current, while the onset of transport as a function of frequency occurs gradually in a manner reminiscent of a phase transition. Our experimental findings are interpreted here with the help of extensive, event driven Molecular Dynamics simulations. In addition to reproducing the experimental results, the simulations revealed that the current may be reversed as a function of the driving frequency as well. We also give details about the simulations so that similar numerical studies can be carried out in a more straightforward manner in the future.
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Affiliation(s)
- Z Farkas
- Department of Biological Physics, Eötvös University, Budapest, Pázmány P. Stny 1A, 1117 Hungary
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27
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Forgon M, Farkas Z, Pákáski M, Zarándi M, Penke B. Aged synthetic human amyloid β-peptide 1-42 and related fragments induce direct acetylcholine release from rat basal forebrain tissue slices. BIOLOGIA FUTURA 1998. [DOI: 10.1007/bf03542978] [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: 10/18/2022]
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28
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Affiliation(s)
- P Kasa
- Alzheimer's Disease Research Centre, A. Szent-Gyorgyi Medical University, Szeged, Hungary
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29
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Forgon M, Farkas Z, Gulya K, Pakaski M, Penke B, Kasa P. Amyloid beta-peptide and its fragments induce acetylcholine release in in vitro basal forebrain tissue slices of rat brain, but do not affect the choline uptake. Neurobiology (Bp) 1998; 6:359-61. [PMID: 9778653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Affiliation(s)
- M Forgon
- Alzheimer's Disease Research Centre, Albert Szent-Györgyi Medical University, Szeged, Hungary
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30
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Abstract
beta-Amyloid peptide (A beta), the principal component of senile plaques in Alzheimer's disease, has been found to be neurotoxic. The role of A beta in the deficits of the GABAergic system in patients with Alzheimer's disease is unclear. It has been suggested that the cytotoxic activity of A beta is localized to amino acid residues 25-35 of this peptide, which contains a total of 42 amino acid residues. We now report that the short amyloid peptide fragments corresponding to amino acids 31-35 (A beta 31-35) and 34-39 (A beta 34-39) are also toxic in vitro to the small GABAergic neuron population of basal forebrain cultures. Morphological changes were accompanied by an increased number of varicosities localized on the processes of the GABA-immunoreactive neurons and by the appearance of round cells without processes. The neurodegeneration was confirmed by means of scanning electron microscopy. Quantification of the morphological findings by image analysis demonstrated a size-related dependence of the degeneration of GABAergic neurons. The results suggest that fragments of A beta shorter than A beta 25-35 may exert cytotoxic action and demonstrate the toxicity of these A beta fragments in decreasing the number of small GABAergic neurons.
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Affiliation(s)
- M Pakaski
- Alzheimer's Disease Research Centre, Albert Szent-Györgyi Medical University, Szeged, Hungary.
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31
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Bede O, Gellén B, Szénási Z, Morvay Z, Farkas Z, Kövesdi J. [Management of hydatid disease of the lung]. Orv Hetil 1998; 139:75-9. [PMID: 9451907] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Cystic echinococcosis is a worldwide zoonose which is not infectious from man to man occurring seldom in our country. The diagnosis and the treatment of a case of a 4-year-old girl with large left-sided lung cyst were presented. Diagnosis was based on history, clinical findings, imaging techniques (conventional X-ray examination, ultrasonography, computer tomography), eosinophilia (7-50%) in blood smear, leucocytosis (28,000), increased sedimentation of blood (85 mm/hour), significantly elevated antibody against of Echinococcus in immunodiagnostic test (passive haemagglutination) with high sensitivity and specificity, light microscopic radiological and scanning electronmicroscopic analysis of cyst content. Continuous thoracic drainage, twice percutan drainage under CT guidance and a new technique for treatment as Puncture-Aspiration-Injection-Respiration and lavage with hypertonic sodium chlorate, long-term chemotherapy with benzimidazole-carbamates (Vermox: 20 mg/kg/day, Zentel: 30-50 mg/kg/day) were reported. The cyst was grown down into a solid mass as large as 4 cm. The body-weight of this child has grown 6 kilograms and laboratory parameters were normalized.
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Affiliation(s)
- O Bede
- Szent-Györgyi Albert Orvostudományi Egyetem, Szeged Gyermekgyógyászati Klinika
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Farkas Z, Ribari O. Some data on the audiological situation and ear care in Hungary and in some central and Eastern European countries. Scand Audiol Suppl 1997; 45:55. [PMID: 9309828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Z Farkas
- Heim Hospital for Sick Children, Budapest
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33
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Farkas Z, Pákáski M, Penke B, Kása P. Acetylcholine release induced in vitro by beta-amyloid and its fragments. Neurobiology (Bp) 1997; 5:59-61. [PMID: 9302698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Z Farkas
- Alzheimer's Disease Research Laboratory, Albert Szent-Györgyl Medical University, Szeged, Hungary
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34
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Kasa P, Farkas Z, Balaspiri L, Wolff JR. The structural localization of galanin, and its function in modulating acetylcholine release in the olfactory bulb of adult rat. Neuroscience 1996; 72:709-23. [PMID: 9157317 DOI: 10.1016/0306-4522(95)00567-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [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: 02/04/2023]
Abstract
The localization of galanin immunoreactivity was analyzed within the olfactory bulb of adult rats. Galanin-positive neurons were differentially distributed among the bulb layers. The density of stained neurons was highest in the glomerular and external plexiform layers. According to morphology, size, location and arrangement, a large proportion of galanin-immunoreactive neurons corresponds to external tufted cells and short-axon neurons in the superficial part of the external plexiform and glomerular layers. A smaller number were middle tufted cells and short-axons neurons while only a few short-axon neurons were labeled in the granule cell layer. Galanin-stained nerve fibers had different structures (thick fibers with or without varicosities, and thin fibers with or without varicosities). Among them were afferent immunoreactive nerve fibers entering the bulb through the olfactory nerve layer, but penetrating superficial layers. Correspondingly, a large number of galanin-positive axons (with or without varicosities) were observed in the olfactory nerve layer. A number of galanin-positive nerve fibers was also present in the glomerular and internal plexiform layers, while these fibers were scarce in the granule cell layer, their density was lowest in the external plexiform layer. These results suggest that galanin-positive axons present in the olfactory bulb originate from at least four different sources. From the periphery axon bundles enter the bulb together with olfactory nerve fibers from the rostral direction and with a fiber bundle from the ventral posterior surface, i.e. at the border between the olfactory tract and the main olfactory bulb along a large blood vessel. Central sources are local interneurons in the olfactory bulb and some extrabulbar brain regions. Double-labeling experiments combining acetylcholinesterase histochemistry with galanin immunocytochemistry did not show any co-localization of acetylcholinesterase and galanin in nerve cell perikarya or nerve fibers. Synthetic porcine galanin (1-29) promoted acetylcholine release in olfactory bulb tissue slices, suggesting that galanin can effectively modulate cholinergic transmission and perhaps other forms of neuronal transmission. It is concluded that galanin may be significantly involved in olfactory processing at cellular and synaptic levels.
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Affiliation(s)
- P Kasa
- Department of Neurology and Psychiatry, Division of Alzheimer's Disease Research Laboratory, Albert Szent-Gyorgyi Medical University, Hungary
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Pákáski M, Farkas Z, Soós K, Penke B, Kása P. Role of Leu(34)-Met(35) in neurotoxicity caused by human beta-amyloid (1-42) peptide in vitro. Neurobiology (Bp) 1996; 4:273-4. [PMID: 9044363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- M Pákáski
- Department of Neurology and Psychiatry, Albert Szent-Györgyi Medical University, Szeged, Hungary
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Abstract
The authors give an account of their experiences with cochlear implants on the basis of 10 years' work. Preoperative evaluation, operating methods and postoperative rehabilitation are presented. During a decade 56 operations were performed, 11 of them on children. Results with prelingually deaf children are demonstrated together with the phenomenon of hearing improvement observed on the contralateral side of the operation.
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Affiliation(s)
- O Ribári
- Department of Otorhinolaryngology, Head and Neck Surgery, Semmelweis University Medical School, Budapest, Hungary
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Sebók L, Farkas Z, Papp H, Baláspiri L, Kása P. The role of human galanin (hGAL1-30), hGAL1-19 and hGAL17-30 in the release of acetylcholine in the striatum: a neuropharmacological study. Neurobiology (Bp) 1996; 4:237-9. [PMID: 9044352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- L Sebók
- Department of Neurology, Albert Szent-Györgyi Medical University, Szeged, Hungary
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Farkas Z, Pákáski M, Baláspiri L, Kása P. Effects of galanins pGAL1-29 and hGAL1-30 and their fragments on cholinergic neurons present in the nucleus of the vertical diagonal band. Neurobiology (Bp) 1996; 4:105-7. [PMID: 9116685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Z Farkas
- Department of Neurology and Psychiatry, Albert Szent-Györgyi Medical University, Szeged, Hungary
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Kasa P, Kovacs I, Farkas Z, Geula C, Yamaguchi H. 73 β-Amyloid precursor protein immunoreactivity does not increases in the cortex and hippocampus of the rat brain in consequence of cholinergic hypoactivity. Neurobiol Aging 1996. [DOI: 10.1016/s0197-4580(96)80075-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kása P, Kovács I, Farkas Z, Geula C. Effect of hypocholinergic activity on the immunoreactivity of beta-amyloid precursor protein in the central nervous system. Neurobiology (Bp) 1996; 4:119-21. [PMID: 9116689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- P Kása
- Department of Neurology and Psychiatry, Albert Szent-Györgyi Medical University, Szeged, Hungary
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Katona G, Büki B, Farkas Z, Pytel J, Simon-Nagy E, Hirschberg J. Transitory evoked otoacoustic emission (TEOAE) in a child with profound hearing loss. Int J Pediatr Otorhinolaryngol 1993; 26:263-7. [PMID: 8509250 DOI: 10.1016/0165-5876(93)90097-m] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [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] [Indexed: 01/31/2023]
Abstract
The case of a 3-month-old, prematurely born boy with auditory brainstem response (ABR), verified profound hearing loss and normal transitory evoked otoacoustic emission is presented. Isolated retrocochlear deafness which did not influence TEOAE is hypothesised as a possible cause. The critical evaluation of results when using TEOAE as a screening method is suggested.
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Affiliation(s)
- G Katona
- Heim Pál Hospital for Sick Children, ENT and Bronchological Department, Budapest, Hungary
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Katona G, Farkas Z, Hirschberg J, Hajdi G, Nyerges G. [Hearing loss resulting from purulent meningitis in the light of adjuvant dexamethasone therapy]. Orv Hetil 1993; 134:247-9. [PMID: 8426731] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Results of objective audiometry of 109 infants and children after purulent meningitis are presented. Among them 17 patients got dexamethasone as a supportive therapy. There was no statistically significant difference in hearing loss between the dexamethasone-treated and the control group. (41 vs 43% sensorineural hearing loss respectively). Authors do not contraindicate the dexamethasone therapy in purulent meningitis because of its harmlessness and useful effect to the course of the disease but further investigations are needed for avoidance of hearing loss following meningitis.
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Affiliation(s)
- G Katona
- Fül-Orr-Gége és Bronchologiai Osztály, Heim Pál Gyermekkórház-Rendelöintézet, Budapest
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Affiliation(s)
- D J Zajac
- Speech, Voice and Language Analysis Laboratory, Children's Hospital of Pittsburgh, PA 15213
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Katona G, Farkas Z, Révai K, Szabó M. [Follow-up studies of patients with neonatal icterus using acoustic evoked potential audiometry]. Orv Hetil 1989; 130:1001-4. [PMID: 2657568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Neonatal hyperbilirubinaemia is a common cause of sensorineural hearing loss. There is no exact method to detect the neurotoxicity of bilirubin. On the other hand the auditory pathway is known to be one of the most sensitive part of the CNS to this toxic agent. 39 one-year-old children were examined by BERA, who had had hyperbilirubinaemia in the newborn period. According to the risk factors the patients were divided into two groups but there was no significant difference in BERA changes. Two infants were found suffering serious hearing loss, who required hearing aids. Five more had some subclinical BERA changes. The authors emphasize the value of acoustic evoked potentials in evaluation infants after neonatal jaundice.
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Kása P, Toldi J, Farkas Z, Joó F, Wolff J. Inhibition by sodium bromide of acetylcholine release and synaptic transmission in the superior cervical ganglion of the rat. Neurochem Int 1987; 11:443-9. [DOI: 10.1016/0197-0186(87)90034-9] [Citation(s) in RCA: 4] [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] [Received: 12/19/1986] [Accepted: 06/29/1987] [Indexed: 10/27/2022]
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Toldi J, Farkas Z, Fehér O, Dames W, Kása P, Gyurkovits K, Joó F, Wolff JR. Promotion by sodium bromide of functional synapse formation from foreign nerves in the superior cervical ganglion of adult rat with intact preganglionic nerve supply. Neurosci Lett 1986; 69:19-24. [PMID: 3748464 DOI: 10.1016/0304-3940(86)90407-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The possible effect of sodium bromide (NaBr) (a substance with known inhibitory action on synaptic transmission) was studied on synapse formation with foreign nerves, implanted into the superior cervical ganglion of adult rats. It was found that in spite of the presence of preganglionic nerve supply, both implanted nerves (n.XII and n.X, respectively) were enabled to establish functional synapses with the principal ganglion cells in NaBr-treated animals. In contrast, synapse formation was almost absent in ganglia of sodium chloride drinking (control) rats with intact preganglionic nerve supply. This effect of NaBr is considered to be analogous to that of GABA, whose promoting action on synaptogenesis in adult rat superior cervical ganglion has been previously described.
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Farkas Z, Kása P, Balcar V, Joó F, Wolff J. Type A and B gaba receptors mediate inhibition of acetylcholine release from cholinergic nerve terminals in the superior cervical ganglion of rat. Neurochem Int 1986; 8:565-72. [DOI: 10.1016/0197-0186(86)90193-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/1985] [Accepted: 11/04/1985] [Indexed: 10/27/2022]
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Troján I, Kecskés L, Vécsei B, Bense S, Brzozka M, Ordögh B, Farkas Z. Tracheal substitution in dogs with reinforced Gore-Tex prosthesis. Thorac Cardiovasc Surg 1985; 33:337-40. [PMID: 2417367 DOI: 10.1055/s-2007-1014162] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Reinforced Gore-Tex prostheses were implanted into the trachea, above the bifurcation, in 11 dogs. The first 3 animals died within a few days, due to an inappropriate surgical technique. The remaining animals were subjected to an adequate surgical procedure and all survived for a period of at least several months, except one which died of an esophago-tracheal fistula after 6 weeks. Ingrowth of respiratory epithelium into the prostheses was observed 5 to 7 weeks postoperatively.
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Iványi B, Farkas Z, Bohus K, Lantos J, Ormos J. [Scanning electron microscopic study of experimental pyelonephritis]. Morphol Igazsagugyi Orv Sz 1984; 24:81-7. [PMID: 6371499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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50
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Várkonyi A, Farkas Z. [Scanning electron microscopy diagnosis of Giardia lamblia infestation]. Orv Hetil 1983; 124:1693-5. [PMID: 6888919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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