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Sagalajev B, Lennartz L, Vieth L, Gunawan CT, Neumaier B, Drzezga A, Visser-Vandewalle V, Endepols H, Sesia T. TgF344-AD Rat Model of Alzheimer's Disease: Spatial Disorientation and Asymmetry in Hemispheric Neurodegeneration. J Alzheimers Dis Rep 2023; 7:1085-1094. [PMID: 37849636 PMCID: PMC10578321 DOI: 10.3233/adr-230038] [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: 05/11/2023] [Accepted: 08/22/2023] [Indexed: 10/19/2023] Open
Abstract
Background The TgF344-AD ratline represents a transgenic animal model of Alzheimer's disease. We previously reported spatial memory impairment in TgF344-AD rats, yet the underlying mechanism remained unknown. We, therefore, set out to determine if spatial memory impairment in TgF344-AD rats is attributed to spatial disorientation. Also, we aimed to investigate whether TgF344-AD rats exhibit signs of asymmetry in hemispheric neurodegeneration, similar to what is reported in spatially disoriented AD patients. Finally, we sought to examine how spatial disorientation correlates with working memory performance. Methods TgF344-AD rats were divided into two groups balanced by sex and genotype. The first group underwent the delayed match-to-sample (DMS) task for the assessment of spatial orientation and working memory, while the second group underwent positron emission tomography (PET) for the assessment of glucose metabolism and microglial activity as in-vivo markers of neurodegeneration. Rats were 13 months old during DMS training and 14-16 months old during DMS testing and PET. Results In the DMS task, TgF344-AD rats were more likely than their wild-type littermates to display strong preference for one of the two levers, preventing working memory testing. Rats without lever-preference showed similar working memory, regardless of their genotype. PET revealed hemispherically asymmetric clusters of increased microglial activity and altered glucose metabolism in TgF344-AD rats. Conclusions TgF344-AD rats display spatial disorientation and hemispherically asymmetrical neurodegeneration, suggesting a potential causal relationship consistent with past clinical research. In rats with preserved spatial orientation, working memory remains intact.
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Affiliation(s)
- Boriss Sagalajev
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Stereotactic and Functional Neurosurgery, Cologne, Germany
- European Graduate School of Neuroscience (EURON), Maastricht, Netherlands
| | - Lina Lennartz
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Stereotactic and Functional Neurosurgery, Cologne, Germany
- European Graduate School of Neuroscience (EURON), Maastricht, Netherlands
| | - Lukas Vieth
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Institute of Radiochemistry and Experimental Molecular Imaging, Cologne, Germany
- Forschungszentrum Jülich GmbH, Institute of Neuroscience and Medicine, Nuclear Chemistry (INM-5), Jülich, Germany
| | - Cecilia Tasya Gunawan
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Stereotactic and Functional Neurosurgery, Cologne, Germany
- European Graduate School of Neuroscience (EURON), Maastricht, Netherlands
| | - Bernd Neumaier
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Institute of Radiochemistry and Experimental Molecular Imaging, Cologne, Germany
- Forschungszentrum Jülich GmbH, Institute of Neuroscience and Medicine, Nuclear Chemistry (INM-5), Jülich, Germany
| | - Alexander Drzezga
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Nuclear Medicine, Cologne, Germany
- Forschungszentrum Jülich GmbH, Institute of Neuroscience and Medicine, Molecular Organization of the Brain (INM-2), Jülich, Germany
| | - Veerle Visser-Vandewalle
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Stereotactic and Functional Neurosurgery, Cologne, Germany
- European Graduate School of Neuroscience (EURON), Maastricht, Netherlands
| | - Heike Endepols
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Institute of Radiochemistry and Experimental Molecular Imaging, Cologne, Germany
- Forschungszentrum Jülich GmbH, Institute of Neuroscience and Medicine, Nuclear Chemistry (INM-5), Jülich, Germany
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Nuclear Medicine, Cologne, Germany
| | - Thibaut Sesia
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Stereotactic and Functional Neurosurgery, Cologne, Germany
- European Graduate School of Neuroscience (EURON), Maastricht, Netherlands
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Chittka D, Lennartz L, Jung B, Banas B, Bergler T. [Successful rituximab treatment of recurrent glomerulonephritis associated with antibodies against the glomerular basement membrane]. Internist (Berl) 2020; 61:416-423. [PMID: 32179970 DOI: 10.1007/s00108-020-00773-5] [Citation(s) in RCA: 1] [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: 11/30/2022]
Abstract
This article presents a case of recurrent anti-GBM disease (with antibodies against the glomerular basement membrane [GBM]) in a 17-year-old patient successfully treated with rituximab. Kidney biopsy with detection of linear deposition of immunoglobulin G (IgG) along the basement membrane is the diagnostic gold standard, which should be accompanied by serological testing. However, standard assays for the detection of anti-GBM antibodies have a high rate of false-negative results. In this particular case, an increase in proteinuria despite standard therapy (plasmapheresis, steroids, cyclophosphamide) was the clinical correlate of relapsing disease. The use of rituximab completely resolved the recurrent anti-GBM disease.
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Affiliation(s)
- D Chittka
- Abteilung Nephrologie, Universitätsklinikum Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Deutschland.
| | - L Lennartz
- Abteilung Nephrologie, Universitätsklinikum Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Deutschland
| | - B Jung
- Abteilung Nephrologie, Universitätsklinikum Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Deutschland
| | - B Banas
- Abteilung Nephrologie, Universitätsklinikum Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Deutschland
| | - T Bergler
- Abteilung Nephrologie, Universitätsklinikum Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Deutschland
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Walter E, Lennartz L, Hofmann W, Herget-Rosenthal S. Die Kosteneffektivität von CystatinC versus Serum Kreatinin in der frühen Erkennung einer diabetischen Nephropathie in Deutschland. DIABETOL STOFFWECHS 2011. [DOI: 10.1055/s-0031-1277502] [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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Abstract
Knowledge of receptor status is important for therapeutic strategies in hormone-dependent tumors. Therefore, methods specifically predicting biological response to endocrine therapy are essential. We investigated the receptor modulation of two breast tumors and one endometrial tumor in the nude mice model after injection of 20 micrograms 17 beta-estradiol. To differentiate the unoccupied and the occupied receptor sites, we used the enzyme immunoassay (EIA) for estrogen receptors (ER) under low- and high-salt conditions. With low-salt extraction we found a sharp decrease of the ER-EIA values within the first hour after estradiol treatment. This decrease continued for 24 hr until recovery to pretreatment levels occurred. In contrast, the ligand-receptor complexes tightly bound to acceptor sites on the DNA increased more than three times within 1 hr. These high levels could be measured for almost 12 hr, and then pretreatment levels were reestablished. The PgR-EIA values under low-salt conditions increased 10-fold within 12 hr, indicating an intact receptor mechanism. We conclude that this immunobiochemical method is a useful tool in determining receptor sites: those both unbound and those tightly bound to nuclear acceptors.
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Affiliation(s)
- A Vering
- Department of Gynecology, University Medical Center, Frankfurt am Main, Germany
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