1
|
Bueno D, Narayan Dey P, Schacht T, Wolf C, Wüllner V, Morpurgo E, Rojas-Charry L, Sessinghaus L, Leukel P, Sommer C, Radyushkin K, Florin L, Baumgart J, Stamm P, Daiber A, Horta G, Nardi L, Vasic V, Schmeisser MJ, Hellwig A, Oskamp A, Bauer A, Anand R, Reichert AS, Ritz S, Nocera G, Jacob C, Peper J, Silies M, Frauenknecht KBM, Schäfer MKE, Methner A. NECAB2 is an endosomal protein important for striatal function. Free Radic Biol Med 2023; 208:643-656. [PMID: 37722569 DOI: 10.1016/j.freeradbiomed.2023.09.003] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 08/29/2023] [Accepted: 09/02/2023] [Indexed: 09/20/2023]
Abstract
Synaptic signaling depends on ATP generated by mitochondria. Dysfunctional mitochondria shift the redox balance towards a more oxidative environment. Due to extensive connectivity, the striatum is especially vulnerable to mitochondrial dysfunction. We found that neuronal calcium-binding protein 2 (NECAB2) plays a role in striatal function and mitochondrial homeostasis. NECAB2 is a predominantly endosomal striatal protein which partially colocalizes with mitochondria. This colocalization is enhanced by mild oxidative stress. Global knockout of Necab2 in the mouse results in increased superoxide levels, increased DNA oxidation and reduced levels of the antioxidant glutathione which correlates with an altered mitochondrial shape and function. Striatal mitochondria from Necab2 knockout mice are more abundant and smaller and characterized by a reduced spare capacity suggestive of intrinsic uncoupling respectively mitochondrial dysfunction. In line with this, we also found an altered stress-induced interaction of endosomes with mitochondria in Necab2 knockout striatal cultures. The predominance of dysfunctional mitochondria and the pro-oxidative redox milieu correlates with a loss of striatal synapses and behavioral changes characteristic of striatal dysfunction like reduced motivation and altered sensory gating. Together this suggests an involvement of NECAB2 in an endosomal pathway of mitochondrial stress response important for striatal function.
Collapse
Affiliation(s)
- Diones Bueno
- University Medical Center of the Johannes Gutenberg-University Mainz, Institute for Molecular Medicine, Germany.
| | - Partha Narayan Dey
- University Medical Center of the Johannes Gutenberg-University Mainz, Institute for Molecular Medicine, Germany.
| | - Teresa Schacht
- University Medical Center of the Johannes Gutenberg-University Mainz, Institute for Molecular Medicine, Germany.
| | - Christina Wolf
- University Medical Center of the Johannes Gutenberg-University Mainz, Institute for Molecular Medicine, Germany.
| | - Verena Wüllner
- University Medical Center of the Johannes Gutenberg-University Mainz, Institute for Molecular Medicine, Germany.
| | - Elena Morpurgo
- University Medical Center of the Johannes Gutenberg-University Mainz, Institute for Molecular Medicine, Germany.
| | - Liliana Rojas-Charry
- University Medical Center of the Johannes Gutenberg-University Mainz, Institute for Molecular Medicine, Germany; University Medical Center of the Johannes Gutenberg-University Mainz, Institute for Anatomy, Germany.
| | - Lena Sessinghaus
- University Medical Center of the Johannes Gutenberg-University Mainz, Institute of Neuropathology, Germany.
| | - Petra Leukel
- University Medical Center of the Johannes Gutenberg-University Mainz, Institute of Neuropathology, Germany.
| | - Clemens Sommer
- University Medical Center of the Johannes Gutenberg-University Mainz, Institute of Neuropathology, Germany.
| | - Konstantin Radyushkin
- University Medical Center of the Johannes Gutenberg-University Mainz, Mouse Behavior Unit, Germany.
| | - Luise Florin
- University Medical Center of the Johannes Gutenberg-University Mainz, Institute for Virology, Germany.
| | - Jan Baumgart
- University Medical Center of the Johannes Gutenberg-University Mainz, Translational Animal Research Center (TARC), Germany.
| | - Paul Stamm
- University Medical Center of the Johannes Gutenberg-University Mainz, Center for Cardiology, Germany.
| | - Andreas Daiber
- University Medical Center of the Johannes Gutenberg-University Mainz, Center for Cardiology, Germany.
| | - Guilherme Horta
- University Medical Center of the Johannes Gutenberg-University Mainz, Institute for Anatomy, Germany.
| | - Leonardo Nardi
- University Medical Center of the Johannes Gutenberg-University Mainz, Institute for Anatomy, Germany.
| | - Verica Vasic
- University Medical Center of the Johannes Gutenberg-University Mainz, Institute for Anatomy, Germany.
| | - Michael J Schmeisser
- University Medical Center of the Johannes Gutenberg-University Mainz, Institute for Anatomy, Germany.
| | - Andrea Hellwig
- Department of Neurobiology, Interdisciplinary Center for Neurosciences (IZN), Heidelberg University, Germany.
| | - Angela Oskamp
- Institute of Neuroscience and Medicine (INM-2), Forschungszentrum Jülich GmbH, Germany.
| | - Andreas Bauer
- Institute of Neuroscience and Medicine (INM-2), Forschungszentrum Jülich GmbH, Germany.
| | - Ruchika Anand
- Institute of Biochemistry and Molecular Biology I, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany.
| | - Andreas S Reichert
- Institute of Biochemistry and Molecular Biology I, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany.
| | - Sandra Ritz
- Institute of Molecular Biology gGmbH (IMB), Mainz, Germany.
| | - Gianluigi Nocera
- Institute of Developmental Biology and Neurobiology, Johannes Gutenberg-University Mainz, Germany.
| | - Claire Jacob
- Institute of Developmental Biology and Neurobiology, Johannes Gutenberg-University Mainz, Germany.
| | - Jonas Peper
- Institute of Developmental Biology and Neurobiology, Johannes Gutenberg-University Mainz, Germany.
| | - Marion Silies
- Institute of Developmental Biology and Neurobiology, Johannes Gutenberg-University Mainz, Germany.
| | - Katrin B M Frauenknecht
- University Medical Center of the Johannes Gutenberg-University Mainz, Institute of Neuropathology, Germany; Institute of Neuropathology, University and University Hospital Zurich, Switzerland.
| | - Michael K E Schäfer
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg-University Mainz, Germany.
| | - Axel Methner
- University Medical Center of the Johannes Gutenberg-University Mainz, Institute for Molecular Medicine, Germany.
| |
Collapse
|
2
|
Schneider D, Oskamp A, Holschbach M, Neumaier B, Bier D, Bauer A. Influence of binding affinity and blood plasma level on cerebral pharmacokinetics and PET imaging characteristics of two novel xanthine PET radioligands for the A1 adenosine receptor. Nucl Med Biol 2020; 82-83:1-8. [DOI: 10.1016/j.nucmedbio.2019.12.001] [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] [Received: 10/09/2019] [Revised: 11/16/2019] [Accepted: 12/01/2019] [Indexed: 10/25/2022]
|
3
|
He X, Wedekind F, Kroll T, Oskamp A, Beer S, Drzezga A, Ermert J, Neumaier B, Bauer A, Elmenhorst D. Image-Derived Input Functions for Quantification of A 1 Adenosine Receptors Availability in Mice Brains Using PET and [ 18F]CPFPX. Front Physiol 2020; 10:1617. [PMID: 32063864 PMCID: PMC7000659 DOI: 10.3389/fphys.2019.01617] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 12/23/2019] [Indexed: 12/28/2022] Open
Abstract
Purpose In vivo imaging for the A1 adenosine receptors (A1ARs) with positron emission tomography (PET) using 8-cyclopentyl-3-(3-[18F]fluoropropyl)-1-propylxan- thine ([18F]CPFPX) has become an important tool for studying physiological processes quantitatively in mice. However, the measurement of arterial input functions (AIFs) on mice is a method with restricted applicability because of the small total blood volume and the related difficulties in withdrawing blood. Therefore, the aim of this study was to extract an appropriate [18F]CPFPX image-derived input function (IDIF) from dynamic PET images of mice. Procedures In this study, five mice were scanned with [18F]CPFPX for 60 min. Arterial blood samples (n = 7 per animal) were collected from the femoral artery and corrected for metabolites. To generate IDIFs, three different approaches were selected: (A) volume of interest (VOI) placed over the heart (cube, 10 mm); (B) VOI set over abdominal vena cava/aorta region with a cuboid (5 × 5 × 15 mm); and (C) with 1 × 1 × 1 mm voxels on five consecutive slices. A calculated scaling factor (α) was used to correct for partial volume effect; the method of obtaining the total metabolite correction of [18F]CPFPX for IDIFs was developed. Three IDIFs were validated by comparison with AIF. Validation included the following: visual performance; computing area under the curve (AUC) ratios (IDIF/AIF) of whole-blood curves and parent curves; and the mean distribution volume (VT) ratios (IDIF/AIF) of A1ARs calculated by Logan plot and two-tissue compartment model. Results Compared with the AIF, the IDIF with VOI over heart showed the best performance among the three IDIFs after scaling by 1.77 (α) in terms of visual analysis, AUC ratios (IDIF/AIF; whole-blood AUC ratio, 1.03 ± 0.06; parent curve AUC ratio, 1.01 ± 0.10) and VT ratios (IDIF/AIF; Logan VT ratio, 1.00 ± 0.17; two-tissue compartment model VT ratio, 1.00 ± 0.13) evaluation. The A1ARs distribution of average parametric images was in good accordance to autoradiography of the mouse brain. Conclusion The proposed study provides evidence that IDIF with VOI over heart can replace AIF effectively for quantification of A1ARs using PET and [18F]CPFPX in mice brains.
Collapse
Affiliation(s)
- Xuan He
- Institut für Neurowissenschaften und Medizin (INM-2), Forschungszentrum Jülich, Jülich, Germany.,Department of Neurophysiology, Institute of Zoology (Bio-II), RWTH Aachen University, Aachen, Germany
| | - Franziska Wedekind
- Institut für Neurowissenschaften und Medizin (INM-2), Forschungszentrum Jülich, Jülich, Germany
| | - Tina Kroll
- Institut für Neurowissenschaften und Medizin (INM-2), Forschungszentrum Jülich, Jülich, Germany
| | - Angela Oskamp
- Institut für Neurowissenschaften und Medizin (INM-2), Forschungszentrum Jülich, Jülich, Germany
| | - Simone Beer
- Institut für Neurowissenschaften und Medizin (INM-2), Forschungszentrum Jülich, Jülich, Germany
| | - Alexander Drzezga
- Institut für Neurowissenschaften und Medizin (INM-2), Forschungszentrum Jülich, Jülich, Germany.,Department of Nuclear Medicine, University Hospital of Cologne, Cologne, Germany
| | - Johannes Ermert
- Institut für Neurowissenschaften und Medizin (INM-5), Forschungszentrum Jülich, Jülich, Germany
| | - Bernd Neumaier
- Institut für Neurowissenschaften und Medizin (INM-5), Forschungszentrum Jülich, Jülich, Germany
| | - Andreas Bauer
- Institut für Neurowissenschaften und Medizin (INM-2), Forschungszentrum Jülich, Jülich, Germany.,Neurological Department, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - David Elmenhorst
- Institut für Neurowissenschaften und Medizin (INM-2), Forschungszentrum Jülich, Jülich, Germany.,Division of Medical Psychology, University of Bonn, Bonn, Germany
| |
Collapse
|
4
|
Schneider D, Oskamp A, Holschbach M, Neumaier B, Bauer A, Bier D. Relevance of In Vitro Metabolism Models to PET Radiotracer Development: Prediction of In Vivo Clearance in Rats from Microsomal Stability Data. Pharmaceuticals (Basel) 2019; 12:ph12020057. [PMID: 31013984 PMCID: PMC6631687 DOI: 10.3390/ph12020057] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 03/24/2019] [Revised: 04/10/2019] [Accepted: 04/12/2019] [Indexed: 01/03/2023] Open
Abstract
The prediction of in vivo clearance from in vitro metabolism models such as liver microsomes is an established procedure in drug discovery. The potentials and limitations of this approach have been extensively evaluated in the pharmaceutical sector; however, this is not the case for the field of positron emission tomography (PET) radiotracer development. The application of PET radiotracers and classical drugs differs greatly with regard to the amount of substance administered. In typical PET imaging sessions, subnanomolar quantities of the radiotracer are injected, resulting in body concentrations that cannot be readily simulated in analytical assays. This raises concerns regarding the predictability of radiotracer clearance from in vitro data. We assessed the accuracy of clearance prediction for three prototypical PET radiotracers developed for imaging the A1 adenosine receptor (A1AR). Using the half-life (t1/2) approach and physiologically based scaling, in vivo clearance in the rat model was predicted from microsomal stability data. Actual clearance could be accurately predicted with an average fold error (AFE) of 0.78 and a root mean square error (RMSE) of 1.6. The observed slight underprediction (1.3-fold) is in accordance with the prediction accuracy reported for classical drugs. This result indicates that the prediction of radiotracer clearance is possible despite concentration differences of more than three orders of magnitude between in vitro and in vivo conditions. Consequently, in vitro metabolism models represent a valuable tool for PET radiotracer development.
Collapse
Affiliation(s)
- Daniela Schneider
- Institute of Neuroscience and Medicine-Molecular Organization of the Brain (INM-2), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany.
| | - Angela Oskamp
- Institute of Neuroscience and Medicine-Molecular Organization of the Brain (INM-2), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany.
| | - Marcus Holschbach
- Institute of Neuroscience and Medicine-Nuclear Chemistry (INM-5), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany.
| | - Bernd Neumaier
- Institute of Neuroscience and Medicine-Nuclear Chemistry (INM-5), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany.
| | - Andreas Bauer
- Institute of Neuroscience and Medicine-Molecular Organization of the Brain (INM-2), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany.
- Neurological Department, Medical Faculty, Heinrich-Heine-University, Universitätsstraße 1, 40225 Düsseldorf, Germany.
| | - Dirk Bier
- Institute of Neuroscience and Medicine-Nuclear Chemistry (INM-5), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany.
| |
Collapse
|
5
|
Wedekind F, Oskamp A, Lang M, Hawlitschka A, Zilles K, Wree A, Bauer A. Intrastriatal administration of botulinum neurotoxin A normalizes striatal D 2
R binding and reduces striatal D 1
R binding in male hemiparkinsonian rats. J Neurosci Res 2018. [DOI: 10.1002/jnr.24198] [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: 11/07/2022]
|
6
|
Wedekind F, Oskamp A, Lang M, Hawlitschka A, Zilles K, Wree A, Bauer A. Intrastriatal administration of botulinum neurotoxin A normalizes striatal D2R binding and reduces striatal D1R binding in male hemiparkinsonian rats. J Neurosci Res 2017; 96:75-86. [DOI: 10.1002/jnr.24110] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 05/18/2017] [Accepted: 06/15/2017] [Indexed: 12/23/2022]
Affiliation(s)
- Franziska Wedekind
- Institute of Neuroscience and Medicine, INM-2, Research Center Jülich; Jülich Germany
| | - Angela Oskamp
- Institute of Neuroscience and Medicine, INM-2, Research Center Jülich; Jülich Germany
| | - Markus Lang
- Institute of Neuroscience and Medicine, INM-5, Research Center Jülich; Jülich Germany
| | | | - Karl Zilles
- Institute of Neuroscience and Medicine, INM-1, Research Center Jülich; Jülich Germany
- Department of Psychiatry; Psychotherapy and Psychosomatics, RWTH Aachen and JARA-Translational Brain Medicine; Aachen Germany
| | - Andreas Wree
- Institute of Anatomy; Rostock University Medical Center; Rostock Germany
| | - Andreas Bauer
- Institute of Neuroscience and Medicine, INM-2, Research Center Jülich; Jülich Germany
- Department of Neurology; Medical Faculty, Heinrich-Heine-University Düsseldorf; Düsseldorf Germany
| |
Collapse
|
7
|
Oskamp A, Wedekind F, Kroll T, Elmenhorst D, Bauer A. Neurotransmitter receptor availability in the rat brain is constant in a 24 hour-period. Chronobiol Int 2017; 34:866-875. [PMID: 28548869 DOI: 10.1080/07420528.2017.1325370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Wakefulness and sleep are fundamental characteristics of the brain. We, therefore, hypothesized that transmitter systems contribute to their regulation and will exhibit circadian alterations. We assessed the concentration of various neurotransmitter receptors and transporters including adenosinergic (A1AR, A2AAR, and ENT1), dopaminergic (D1R, D2R, and DAT), and serotonergic (5-HT2AR) target proteins. Adult male Sprague Dawley rats were used and maintained in a 12 h light: 12 h dark cycle (lights on from 07:00 h to 19:00 h). We measured receptor and transporter concentrations in different brain regions, including caudate putamen, basal forebrain, and cortex in 4 hour-intervals over a 24 hour-period using quantitative in vitro autoradiography. Investigated receptors and transporters showed no fluctuations in any of the analyzed regions using one-way ANOVA. Only in the horizontal diagonal band of Broca, the difference of A1AR concentration between light and dark phases (t-test) as well as the cosinor analysis of the 24 hour-course were significant, suggesting that this region underlies receptor fluctuations. Our findings suggest that the availability of the investigated neurotransmitter receptors and transporters does not undergo changes in a 24 hour-period. While there are reports on changes in adenosine and dopamine receptors during sleep deprivation, we found no changes in the investigated adenosine, dopamine, and serotonin receptors during regular and undisturbed day-night cycles.
Collapse
Affiliation(s)
- A Oskamp
- a Institute for Neuroscience and Medicine (INM-2) , Forschungszentrum Jülich , Jülich , Germany
| | - F Wedekind
- a Institute for Neuroscience and Medicine (INM-2) , Forschungszentrum Jülich , Jülich , Germany
| | - T Kroll
- a Institute for Neuroscience and Medicine (INM-2) , Forschungszentrum Jülich , Jülich , Germany
| | - D Elmenhorst
- a Institute for Neuroscience and Medicine (INM-2) , Forschungszentrum Jülich , Jülich , Germany.,b Psychiatry and Psychotherapy, Medical Psychology , Rheinische Friedrich-Wilhelms-University Bonn , Bonn , Germany
| | - A Bauer
- a Institute for Neuroscience and Medicine (INM-2) , Forschungszentrum Jülich , Jülich , Germany.,c Neurological Department , Heinrich-Heine-University Düsseldorf , Düsseldorf , Germany
| |
Collapse
|
8
|
Elmenhorst D, Mertens K, Kroll T, Oskamp A, Ermert J, Elmenhorst EM, Wedekind F, Beer S, Coenen HH, Bauer A. Circadian variation of metabotropic glutamate receptor 5 availability in the rat brain. J Sleep Res 2016; 25:754-761. [PMID: 27357735 DOI: 10.1111/jsr.12432] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [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: 12/15/2015] [Accepted: 05/02/2016] [Indexed: 12/20/2022]
Abstract
The metabotrophic subtype 5 glutamate receptor (mGluR5) plays a critical role in synaptic plasticity besides its involvement in numerous neurological disorders, such as depression. As mGluR5 availability in humans is altered in sleep deprivation, we hypothesized that mGluR5 availability underlies a circadian variation. To investigate whether mGluR5 underlies potential circadian changes we measured its density in a randomized fashion at six different daytimes in 11 adult Sprague-Dawley rats. mGluR5 density was quantified by positron emission tomography (PET) using the radioactive ligand [11 C]ABP688. [11 C]ABP688 uptake was quantified in nine regions of interest with a reference tissue model. Significant differences in the binding potential (BPND ) and therefore mGluR5 availability between the different circadian times were found in cortex, cingulate cortex, amygdala, caudate putamen and nucleus accumbens. Further post-hoc statistical analysis (Tukey-Kramer test) of the different time-points revealed significant changes in BPND between 07:00 hours (start of light-on phase) and 15:00 hours (last time-point of the light-on phase) in the caudate putamen. This study shows that mGluR5 availability is increased during the light-on, or sleep phase, of rodents by approximately 10%. Given that altered mGluR5 densities play a role in psychiatric disorders, further investigation is warranted to evaluate their circadian involvement in mood changes in humans.
Collapse
Affiliation(s)
- David Elmenhorst
- Institute of Neuroscience and Medicine, INM-2, Forschungszentrum Jülich, Jülich, Germany
| | - Kristina Mertens
- Institute of Neuroscience and Medicine, INM-2, Forschungszentrum Jülich, Jülich, Germany
| | - Tina Kroll
- Institute of Neuroscience and Medicine, INM-2, Forschungszentrum Jülich, Jülich, Germany
| | - Angela Oskamp
- Institute of Neuroscience and Medicine, INM-2, Forschungszentrum Jülich, Jülich, Germany
| | - Johannes Ermert
- Institute of Neuroscience and Medicine, INM-5, Forschungszentrum Jülich, Jülich, Germany
| | | | - Franziska Wedekind
- Institute of Neuroscience and Medicine, INM-2, Forschungszentrum Jülich, Jülich, Germany
| | - Simone Beer
- Institute of Neuroscience and Medicine, INM-2, Forschungszentrum Jülich, Jülich, Germany
| | - Heinz H Coenen
- Institute of Neuroscience and Medicine, INM-5, Forschungszentrum Jülich, Jülich, Germany
| | - Andreas Bauer
- Institute of Neuroscience and Medicine, INM-2, Forschungszentrum Jülich, Jülich, Germany
| |
Collapse
|