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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.
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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.
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