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September 2021
Studies in Health Technology and Informatics
Kusch H, Kossen R, Suhr M, Freckmann L, Weber L, Henke C, Lehmann C, Rheinländer S, Aschenbrandt G, Kühlborn LK, Marzec B, Menzel J, Schwappach B, Zelarayán LC, Cyganek L, Antonios G, Kohl T, Lehnart SE, Zoremba M, Sax U, Nussbeck SY
September 2021
Clinical Genetics
Mikaeel RR, Young JP, Li Y, Poplawski NK, Smith E, Horsnell M, Uylaki W, Tomita Y, Townsend AR, Feng J, Zibat A, Kaulfuß S, Müller C, Yigit G, Wollnik B, Scott H, Rawlings L, Denae H, Vakulin C, Dubowsky A, Price TJ
September 2021
Science Advances
Kerimoglu C, Pham L, Tonchev AB, Sakib MS, Xie Y, Sokpor G, Ulmke PA, Kaurani L, Abbas E, Nguyen H, Rosenbusch J, Michurina A, Capece V, Angelova M, Maricic N, Brand-Saberi B, Esgleas M, Albert M, Minkov R, Kovachev E, Teichmann U, Seong RH, Huttner WB, Nguyen HP, Stoykova A, Staiger JF, Fischer A, Tuoc T
September 2021
Nucleic Acids Research
Aibara S, Dienemann Ch, Cramer P
September 2021
Journal of Neuroscience
Butola T, Alvanos T, Hintze A, Koppensteiner P, Kleindienst D, Shigemoto R, Wichmann C, Moser T
September 2021
Nature
Kokic G, Wagner FR, Chernev A, Urlaub H, Cramer P
September 2021
Nature Structural & Molecular Biology
Bhatta A, Dienemann C, Cramer P, Hillen HS
August 2021
Scientific Reports
Sertel SM, Blumenstein W, Mandad S, Shomroni O, Salinas G, Rizzoli SO
August 2021
Movement Disorders
Thom T, Schmitz M, Fischer AL, Correia A, Correia S, Llorens F, Pique AV, Möbius W, Domingues R, Zafar S, Stoops E, Silva CJ, Fischer A, Outeiro TF, Zerr I

Authors

Thom T, Schmitz M, Fischer AL, Correia A, Correia S, Llorens F, Pique AV, Möbius W, Domingues R, Zafar S, Stoops E, Silva CJ, Fischer A, Outeiro TF, Zerr I

Journal

Movement Disorders

Citation

Mov Disord. 2021 Aug 27.

Abstract

Background
The cellular prion protein (PrPC) is a membrane-bound, multifunctional protein mainly expressed in neuronal tissues. Recent studies indicate that the native trafficking of PrPC can be misused to internalize misfolded amyloid beta and α-synuclein (aSyn) oligomers.

Objectives
We define PrPC’s role in internalizing misfolded aSyn in α-synucleinopathies and identify further involved proteins.

Methods
We performed comprehensive behavioral studies on four transgenic mouse models (ThySyn and ThySynPrP00, TgM83 and TgMPrP00) at different ages. We developed PrPC-(over)-expressing cell models (cell line and primary cortical neurons), used confocal laser microscopy to perform colocalization studies, applied mass spectrometry to identify interactomes, and determined disassociation constants using surface plasmon resonance (SPR) spectroscopy.

Results
Behavioral deficits (memory, anxiety, locomotion, etc.), reduced lifespans, and higher oligomeric aSyn levels were observed in PrPC-expressing mice (ThySyn and TgM83), but not in homologous Prnp ablated mice (ThySynPrP00 and TgMPrP00). PrPC colocalized with and facilitated aSyn (oligomeric and monomeric) internalization in our cell-based models. Glimepiride treatment of PrPC-overexpressing cells reduced aSyn internalization in a dose-dependent manner. SPR analysis showed that the binding affinity of PrPC to monomeric aSyn was lower than to oligomeric aSyn. Mass spectrometry-based proteomic studies identified clathrin in the immunoprecipitates of PrPC and aSyn. SPR was used to show that clathrin binds to recombinant PrP, but not aSyn. Experimental disruption of clathrin-coated vesicles significantly decreased aSyn internalization.

Conclusion
PrPC’s native trafficking can be misused to internalize misfolded aSyn through a clathrin-based mechanism, which may facilitate the spreading of pathological aSyn. Disruption of aSyn-PrPC binding is, therefore, an appealing therapeutic target in α-synucleinopathies. © 2021 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society

DOI

10.1002/mds.28774

Pubmed Link

 

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