1
|
Grabowska W, King R, Roll S, Habermann IV, Hörder S, Hahn K, Willich SN, Schröder S, Brinkhaus B, Dietzel J. Reliability of a novel point of care device for monitoring diabetic peripheral neuropathy. Sci Rep 2023; 13:19043. [PMID: 37923763 PMCID: PMC10624654 DOI: 10.1038/s41598-023-45841-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 10/24/2023] [Indexed: 11/06/2023] Open
Abstract
We aimed to assess DPNCheck's reliability for repeated sural nerve conduction (NC) parameters. This post hoc analysis used data from the randomized controlled ACUDPN trial assessing NC of the N. Suralis every eight weeks over a 6-month period in 62 patients receiving acupuncture against diabetic peripheral neuropathy (DPN) symptoms. The reliability of DPNCheck for nerve conduction velocity and amplitude was assessed using intraclass correlation coefficients (ICC) and was calculated using data from single time points and repeated measures design. The results of the NC measurements were correlated with the Total Neuropathy Score clinical (TNSc). Overall, for both nerve velocity and amplitude, the reliability at each measurement time point can be described as moderate to good and the reliability using repeated measures design can be described as moderate. Nerve velocity and amplitude showed weak correlation with TNSc. DPNCheck's reliability results question its suitability for monitoring DPN's progression. Given the limitation of our analysis, a long-term, pre-specified, fully crossed study should be carried out among patients with DPN to fully determine the suitability of the device for DPN progression monitoring. This was the first analysis assessing the reliability of the DPNCheck for DPN progression monitoring using data from multiple collection time points.
Collapse
Affiliation(s)
- W Grabowska
- Institute of Social Medicine, Epidemiology and Health Economics, Charité -Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Luisenstr. 57, 10117, Berlin, Germany
| | - R King
- Institute of Social Medicine, Epidemiology and Health Economics, Charité -Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Luisenstr. 57, 10117, Berlin, Germany
| | - S Roll
- Institute of Social Medicine, Epidemiology and Health Economics, Charité -Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Luisenstr. 57, 10117, Berlin, Germany
| | - I V Habermann
- Institute of Social Medicine, Epidemiology and Health Economics, Charité -Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Luisenstr. 57, 10117, Berlin, Germany
| | - S Hörder
- Institute of Social Medicine, Epidemiology and Health Economics, Charité -Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Luisenstr. 57, 10117, Berlin, Germany
| | - K Hahn
- Department of Neurology with Experimental Neurology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - S N Willich
- Institute of Social Medicine, Epidemiology and Health Economics, Charité -Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Luisenstr. 57, 10117, Berlin, Germany
| | - S Schröder
- Hanse Merkur Center for Traditional Chinese Medicine at the University Medical Center Hamburg-Eppendorf, Martinistrasse 64, 20251, Hamburg, Germany
| | - B Brinkhaus
- Institute of Social Medicine, Epidemiology and Health Economics, Charité -Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Luisenstr. 57, 10117, Berlin, Germany
| | - J Dietzel
- Institute of Social Medicine, Epidemiology and Health Economics, Charité -Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Luisenstr. 57, 10117, Berlin, Germany.
| |
Collapse
|
2
|
Gutmann S, Tästensen C, Böttcher IC, Dietzel J, Loderstedt S, Kohl S, Matiasek K, Flegel T. Clinical use of a new frameless optical neuronavigation system for brain biopsies: 10 cases (2013-2020). J Small Anim Pract 2022; 63:468-481. [PMID: 35141897 DOI: 10.1111/jsap.13482] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 11/09/2021] [Accepted: 01/18/2022] [Indexed: 01/25/2023]
Abstract
OBJECTIVES The aim of the retrospective study was to describe the brain biopsy procedure using a new frameless optical neuronavigation system and to report diagnostic yield and complications associated with the procedure. MATERIALS AND METHODS The medical records for all dogs with forebrain lesions that underwent brain biopsy with a frameless optical neuronavigation system in a single referral hospital between 2013 and 2020 were retrospectively analysed. Following data were collected: signalment, neurological signs, diagnostic findings, number of brain biopsy samples, sampled region, complications, duration of hospitalisation, whether the samples were diagnostic and histopathological diagnoses. The device consists of a computer workstation with navigation software, an infrared camera, patient tracker and reflective instruments. The biopsy needle was equipped with reflective spheres, so the surgeon could see the position of the needle during sampling the intracranial lesion free handed through a mini-burr hole. RESULTS Ten dogs were included. Absolute diagnostic yield based on specific histopathological diagnosis was 73.9%. Three dogs had immune-mediated necrotizing encephalitis, two dogs showed a necrotizing leukoencephalitis and two dogs a meningoencephalitis of unknown origin. In two dogs, the brain specimen showed unspecific changes. In one dog, the samples were non-diagnostic. Seven dogs showed no neurological deterioration, one dog mild temporary ataxia and two dogs died within 36 hours post brain biopsy. CLINICAL SIGNIFICANCE In these 10 dogs, the frameless optical neuronavigation system employed was useful to gain diagnostic brain biopsy samples. Considering the mortality rate observed, further studies are needed to confirm the safety of this procedure and prove its actual clinical effectiveness.
Collapse
Affiliation(s)
- S Gutmann
- Department for Small Animal, Faculty of Veterinary Medicine, Leipzig University, 04103, Leipzig, Germany
| | - C Tästensen
- Department for Small Animal, Faculty of Veterinary Medicine, Leipzig University, 04103, Leipzig, Germany
| | - I C Böttcher
- Department for Small Animal, Faculty of Veterinary Medicine, Leipzig University, 04103, Leipzig, Germany
| | - J Dietzel
- Department for Small Animal, Faculty of Veterinary Medicine, Leipzig University, 04103, Leipzig, Germany
| | - S Loderstedt
- Department for Small Animal, Faculty of Veterinary Medicine, Leipzig University, 04103, Leipzig, Germany
| | - S Kohl
- Department for Small Animal, Faculty of Veterinary Medicine, Leipzig University, 04103, Leipzig, Germany
| | - K Matiasek
- Section of Clinical and Comparative Neuropathology, Ludwig-Maximilians-Universität, Munich, Germany
| | - T Flegel
- Department for Small Animal, Faculty of Veterinary Medicine, Leipzig University, 04103, Leipzig, Germany
| |
Collapse
|
3
|
Grothe J, Riedel-Heller SG, Dietzel J, Schomerus G, Röhr S. Assessing changes in social functioning in the course of dementia: an instrument for research and clinical practice in German-speaking Areas. Das Gesundheitswesen 2021. [DOI: 10.1055/s-0041-1736084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- J Grothe
- Institut für Sozialmedizin, Arbeitsmedizin und Public Health, Medizinische Fakultät, Universität Leipzig
| | - SG Riedel-Heller
- Institut für Sozialmedizin, Arbeitsmedizin und Public Health, Medizinische Fakultät, Universität Leipzig
| | - J Dietzel
- Klinik und Poliklinik für Psychiatrie und Psychotherapie, Universitätsklinikum Leipzig
| | - G Schomerus
- Klinik und Poliklinik für Psychiatrie und Psychotherapie, Universitätsklinikum Leipzig
| | - S Röhr
- Institut für Sozialmedizin, Arbeitsmedizin und Public Health, Medizinische Fakultät, Universität Leipzig
| |
Collapse
|
4
|
Dietzel J, Hörder S, Habermann IV, Meyer-Hamme G, Hahn K, Ortiz M, Roll S, Linde K, Irnich D, Hammes M, Nögel R, Wullinger M, Wortman V, Hummelsberger J, Willich SN, Schröder S, Brinkhaus B. Acupuncture in diabetic peripheral neuropathy-protocol for the randomized, multicenter ACUDPN trial. Trials 2021; 22:164. [PMID: 33637134 PMCID: PMC7907791 DOI: 10.1186/s13063-021-05110-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 02/09/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Acupuncture is used to treat patients with diabetic peripheral neuropathy; however, the evidence is unclear. We present the design and methodology of the ACUDPN (ACUpuncture in Diabetic Peripheral Neuropathy) trial, which investigates the effectiveness of acupuncture for the treatment of diabetic peripheral neuropathy (DPN) symptoms. The aim of this study is to investigate whether acupuncture is effective for the treatment of DPN symptoms. METHODS This study is a two-armed, randomized, controlled, parallel group, open-label, confirmatory, multicenter trial (8-week intervention period plus 16 weeks of follow-up). Physicians in outpatient units in Germany who specialize in acupuncture treatment will treat 110 diabetes type II patients with clinical symptoms of peripheral neuropathy in the feet and legs with signs of neuropathy according to nerve conduction testing. The patients will be randomized in a 1:1 ratio to one of the following two groups: (a) semi-standardized acupuncture plus routine care or (b) routine care alone. Acupuncture will consist of 12 treatments per patient over 8 weeks. The primary outcome will be the overall DPN-related complaints in the extremities after 8 weeks as measured by the Visual Analog Scale (VAS). Further outcome measures will include DPN-related pain, the Neuropathic Pain Symptom Inventory (NPSI), Diabetic Peripheral Neuropathic Pain Impact (DPNPI) scores, and nerve conduction parameters of the sural nerve at weeks 8, 16, and 24. DISCUSSION The results of this trial will be available in 2021 and will help clarify whether acupuncture can be considered effective for the treatment of DPN with regard to the subdimensions of the neuropathic clinical picture. TRIAL REGISTRATION ClinicalTrials.gov NCT03755960 . Registered on 11 August 2018.
Collapse
Affiliation(s)
- J Dietzel
- Institute for Social Medicine, Epidemiology and Health Economics, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Luisenstr. 57, 10117, Berlin, Germany.
| | - S Hörder
- Institute for Social Medicine, Epidemiology and Health Economics, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Luisenstr. 57, 10117, Berlin, Germany
| | - I V Habermann
- Institute for Social Medicine, Epidemiology and Health Economics, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Luisenstr. 57, 10117, Berlin, Germany
| | - G Meyer-Hamme
- TCM-Zentrum am UKE, Breitenfelder Str. 15, 20251, Hamburg, Germany
| | - K Hahn
- Department of Neurology with Experimental Neurology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - M Ortiz
- Institute for Social Medicine, Epidemiology and Health Economics, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Luisenstr. 57, 10117, Berlin, Germany
| | - S Roll
- Institute for Social Medicine, Epidemiology and Health Economics, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Luisenstr. 57, 10117, Berlin, Germany
| | - K Linde
- TUM School of Medicine, Institute of General Practice, Technical University of Munich, Munich, Germany
| | - D Irnich
- Department of Anaesthesiology, Ludwig-Maximilians University (LMU), Marchioninistraße 15, Munich, Germany
| | - M Hammes
- Praxis Dr.med. Michael Hammes, Louisenstraße 27a, Homburg, Germany
| | - R Nögel
- Praxis Prof. Hempen & Kollegen, Fachärztliches Zentrum, Chinesische Medizin, Akupunktur, Franz-Joseph-Straße 38, 80801, Munich, Germany
| | - M Wullinger
- Praxis für chinesische Medizin, Rathausstr. 10, 83022, Rosenheim, Germany
| | - V Wortman
- Praxis für TCM, Dilherrstr. 6, 90429, Nürnberg, Germany
| | | | - S N Willich
- Institute for Social Medicine, Epidemiology and Health Economics, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Luisenstr. 57, 10117, Berlin, Germany
| | - S Schröder
- TCM-Zentrum am UKE, Breitenfelder Str. 15, 20251, Hamburg, Germany
| | - B Brinkhaus
- Institute for Social Medicine, Epidemiology and Health Economics, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Luisenstr. 57, 10117, Berlin, Germany
| |
Collapse
|
5
|
Dietzel J, Witstruck T, Adler S, Usichenko T. Acupuncture for treatment of therapy-resistant post-dural puncture headache: a retrospective case series. Br J Anaesth 2013; 111:847-9. [DOI: 10.1093/bja/aet369] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
6
|
Surrey M, Dietzel J, Tchartchian G, De Wilde R, Bojahr B, Diesfeld P. Saving Time in Laparoscopy Using a New Safe Entry Trocar. J Minim Invasive Gynecol 2010. [DOI: 10.1016/j.jmig.2010.08.384] [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]
|
7
|
Tchartchian G, Dietzel J, Bojahr B, Hackethal A, De Wilde R. No more abdominal hysterectomy for myomata using a new minimally-invasive technique. Int J Surg Case Rep 2010; 1:7-8. [PMID: 22096663 PMCID: PMC3199612 DOI: 10.1016/j.ijscr.2010.06.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2010] [Accepted: 06/14/2010] [Indexed: 11/22/2022] Open
Abstract
To perform hysterectomy in uterus myomatosus, there are several surgical techniques. For a uterine weight of >1000 g, after a caesarean section and in nullipara per vaginam, the most common surgical technique for hysterectomy in patients is hysterectomy per laparotomiam. A new endoscopical technique developed to treat such patients and to avoid laparotomy is described in this case report: the laparoscopic combined hysterectomy (LACH) using the change-over technique. Adhesiolysis, preparation of the ureters and the bladder and morcellation of the uterus of 2480 g were performed minimally-invasive in two steps, from one side of the patient with a change-over of the OP-team to the other side of the patient. The cervix was removed per vaginam.
Collapse
Affiliation(s)
- G. Tchartchian
- Department of Obstetrics and Gynecology, Pius-Clinic, Oldenburg, Germany
| | - J. Dietzel
- Department of Obstetrics and Gynecology, Pius-Clinic, Oldenburg, Germany
| | - B. Bojahr
- Clinic of Minimally Invasive Surgery, Evangelic Hospital Hubertus, Berlin, Germany
| | - A. Hackethal
- Department of Obstetrics and Gynecology, University of Gießen, Germany
| | - R.L. De Wilde
- Department of Obstetrics and Gynecology, Pius-Clinic, Oldenburg, Germany
| |
Collapse
|
8
|
Techartchian G, Dietzel J, Surrey M. Saving Time in Laparoscopy Using a New Safe Entry Trochar. J Minim Invasive Gynecol 2009. [DOI: 10.1016/j.jmig.2009.08.312] [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: 11/15/2022]
|
9
|
Dietzel J, Krebs A, Lüdemann J, Böttcher D, Roser M, Dressel A. Nachweis von β-trace-Protein in Pleuraergüssen und Aszites: Konsequenz für die Diagnostik von Liquorfisteln. Akt Neurol 2009. [DOI: 10.1055/s-0029-1238342] [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]
|
10
|
|
11
|
Dietzel J, Grundling M, Pavlovic D, Usichenko T. Acupuncture for persistent hiccup in an intensive care patient – a case report. Akt Neurol 2008. [DOI: 10.1055/s-0028-1086769] [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: 10/21/2022]
|
12
|
Abstract
Neutrophils in cerebrospinal fluid (CSF) samples are commonly considered a pathological feature; however, there is little information on the frequency and significance of these cells in CSF samples without pleocytosis. Therefore, the frequency and possible clinical significance of neutrophils in CSF was investigated. In a retrospective study comprising 1556 consecutive CSF samples, cytologies and patient records were reviewed. Five hundred thirty-eight CSF samples without pleocytosis were identified. Neutrophils were detected in 35.5% of these samples. The presence of neutrophils was associated with sepsis (P < 0.01), recent epileptic seizure (P < 0.0001), and blood contamination (P < 0.01). Amongst patients without CSF pleocytosis, CNS infections were not more frequent if neutrophils were present. Neutrophils are frequently observed in CSF with normal leukocyte counts. As sepsis but not CNS infection occurred more frequently in these patients, we conclude that in the absence of CSF pleocytosis, neutrophils are not indicative of CNS infections.
Collapse
Affiliation(s)
- J Dietzel
- Department of Neurology, Ernst-Moritz-Arndt-University Greifswald, Ferdinand-Sauerbruch-Strasse, Germany
| | | | | | | | | |
Collapse
|
13
|
Dietzel J, Kuhrt H, Stahl T, Kacza J, Seeger J, Weber M, Uhlig A, Reichenbach A, Grosche A, Pannicke T. Morphometric analysis of the retina from horses infected with the Borna disease virus. Vet Pathol 2007; 44:57-63. [PMID: 17197624 DOI: 10.1354/vp.44-1-57] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [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: 01/01/2023]
Abstract
Borna disease (BD) is a fatal disorder of horses, often characterized by blindness. Although degeneration of retinal neurons has been demonstrated in a rat model, there are controversial data concerning whether a similar degeneration occurs in the retina of infected horses. To investigate whether BD may cause degeneration of photoreceptors and possibly of other neuronal cells at least at later stages of the disease, we performed a detailed quantitative morphologic study of retinal tissue from Borna-diseased horses. BD was diagnosed by detection of pathognomonic Joest-Degen inclusion bodies in the postmortem brains. Paraffin sections of paraformaldehyde-fixed retinae were used for histologic and immunohistochemical stainings. Numbers of neurons and Müller glial cells were counted, and neuron-to-Müller cell ratios were calculated. Among tissues from 9 horses with BD, we found retinae with strongly altered histologic appearance as well as retinae with only minor changes. The neuron-to-Müller cell ratio for the whole retina was significantly smaller in diseased animals (8.5 +/- 0.4; P < .01) as compared with controls (17.6 +/- 0.8). It can be concluded that BD in horses causes alterations of the retinal histology of a variable degree. The study provides new data about the pathogenesis of BD concerning the retina and demonstrates that a loss of photoreceptors may explain the observed blindness in infected horses.
Collapse
Affiliation(s)
- J Dietzel
- Paul-Flechsig-Institut für Hirnforschung, Universität Leipzig, Jahnallee 59, D-04109 Leipzig, Germany
| | | | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Dietzel J, Krebs A, Fröhlich CP, Vogelgesang S, Roser M, Dressel A. Hochgradige thorakale intraspinale Raumforderung ohne Störung der Blut-Liquor-Schranke. Akt Neurol 2007. [DOI: 10.1055/s-2007-988027] [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: 10/21/2022]
|
15
|
Dettmann S, Schwarze J, Dietzel J, Klingelhöfer J. Bilateral neuralgic amyotrophy – a case report. KLIN NEUROPHYSIOL 2006. [DOI: 10.1055/s-2006-939125] [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]
|
16
|
Dietzel J, Schwarze J, Dettmann S, Klingelhöfer J. Hirninfarkt bei cerebrovaskulärer Neuroborreliose. Akt Neurol 2006. [DOI: 10.1055/s-2006-953428] [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]
|
17
|
Dietzel J, Krebs A, Lüdemann J, Roser M, Dressel A. Systemische Inflammation und Granulozyten im Liquor ohne Pleozytose. Akt Neurol 2006. [DOI: 10.1055/s-2006-953370] [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]
|
18
|
Kacza J, Mohr C, Pannicke T, Kuhrt H, Dietzel J, Flüss M, Richt JA, Vahlenkamp TW, Stahl T, Reichenbach A, Seeger J. Changes of the organotypic retinal organization in Borna virus-infected Lewis rats. J Neurocytol 2001; 30:801-20. [PMID: 12165671 DOI: 10.1023/a:1019641404940] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Retinae of Borna disease virus (BDV)-infected Lewis rats were investigated with emphasis on long-term changes in organotypic tissue organization and glia-neuron relationship. Virus inoculation was attained via intracerebral BDV injection. Following survival times ranging between two and eight months, the retinal thickness was reduced up to one third of that of controls. Photoreceptor segments were completely extinguished and the number of neurons was dramatically reduced. The typical laminar organization of the retina was largely dissolved. Electron microscopy revealed severe spongy degeneration. Large numbers of activated microglia and macrophages were found, both cell types performing very active phagocytosis. The microglial cells expressed an extraordinary phenotype as characterized by large numbers of processes, with some of them penetrating the endfeet of Müller cells and others establishing highly complex interdigitations with vacuolized swellings and endings of neuronal processes. Müller cells were not reduced in number but displayed clear indications of gliosis such as alterations in the immunoreactivity for filament proteins and glutamine synthetase, significantly thickened stem processes, and an altered pattern of K(+) currents in patch-clamp recordings. These findings demonstrate for the first time long-term neuron-glia interactions in the retina of BDV-infected rats. Moreover, the data contribute to our knowledge on structural and functional alterations accompanying persisting virus infection in the central nervous system.
Collapse
Affiliation(s)
- J Kacza
- Department of Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Dietzel J, Hirzmann J, Preis D, Symmons P, Kunz W. Ferritins of Schistosoma mansoni: sequence comparison and expression in female and male worms. Mol Biochem Parasitol 1992; 50:245-54. [PMID: 1741011 DOI: 10.1016/0166-6851(92)90221-5] [Citation(s) in RCA: 52] [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] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Recombinant clones of Schistosoma mansoni cDNA libraries containing the complete coding regions of 2 different ferritin subunits have been isolated and sequenced. This allows for the first time a comparison of ferritin sequences from an invertebrate with those of vertebrates. The deduced amino acid sequences of both Schistosoma ferritin subunit clones show significant homology to vertebrate ferritin H chains. Similarity exceeds 50% identity and includes the recently identified ferroxidase center which is present only in H chains. However, non-conservative substitutions of amino acid residues lining the 3-fold symmetry channel were found, and a gap of 3 successive amino acids unique to the 2 Schistosoma ferritin sequences was identified. Remarkably, for each of the 2 genes, we found a conspicuous difference in the amount of ferritin transcripts between females and males: one of the genes is preferentially expressed in females, the other in males.
Collapse
Affiliation(s)
- J Dietzel
- Institut für Genetik, Heinrich-Heine-Universität, Düsseldorf, F.R.G
| | | | | | | | | |
Collapse
|