Selective In Vitro and Ex Vivo Staining of Brain Neurofibrillary Tangles and Amyloid Plaques by Novel Ethylene Ethynylene-Based Optical Sensors.

Autor: Monge FA; Biomedical Engineering Graduate Program, University of New Mexico, Albuquerque, NM 87131, USA.; Center for Biomedical Engineering, University of New Mexico, Albuquerque, NM 87131, USA., Fanni AM; Biomedical Engineering Graduate Program, University of New Mexico, Albuquerque, NM 87131, USA.; Center for Biomedical Engineering, University of New Mexico, Albuquerque, NM 87131, USA., Donabedian PL; Center for Biomedical Engineering, University of New Mexico, Albuquerque, NM 87131, USA.; Nanoscience and Microsystems Engineering Graduate Program, University of New Mexico, Albuquerque, NM 87131, USA., Hulse J; Molecular Genetics and Microbiology, University of New Mexico, Albuquerque, NM 87131, USA., Maphis NM; Molecular Genetics and Microbiology, University of New Mexico, Albuquerque, NM 87131, USA.; Department of Neuroscience, University of New Mexico, Albuquerque, NM 87131, USA., Jiang S; Department of Neuroscience, University of New Mexico, Albuquerque, NM 87131, USA.; Sartorius, Bohemia, NY 11716, USA., Donaldson TN; Department of Psychology, University of New Mexico, Albuquerque, NM 87131, USA., Clark BJ; Department of Psychology, University of New Mexico, Albuquerque, NM 87131, USA., Whitten DG; Center for Biomedical Engineering, University of New Mexico, Albuquerque, NM 87131, USA.; Department of Chemical and Biological Engineering, University of New Mexico, Albuquerque, NM 87131, USA., Bhaskar K; Department of Neuroscience, University of New Mexico, Albuquerque, NM 87131, USA., Chi EY; Center for Biomedical Engineering, University of New Mexico, Albuquerque, NM 87131, USA.; Department of Psychology, University of New Mexico, Albuquerque, NM 87131, USA.
Jazyk: angličtina
Zdroj: Biosensors [Biosensors (Basel)] 2023 Jan 18; Vol. 13 (2). Date of Electronic Publication: 2023 Jan 18.
DOI: 10.3390/bios13020151
Abstrakt: The identification of protein aggregates as biomarkers for neurodegeneration is an area of interest for disease diagnosis and treatment development. In this work, we present novel super luminescent conjugated polyelectrolyte molecules as ex vivo sensors for tau-paired helical filaments (PHFs) and amyloid-β (Aβ) plaques. We evaluated the use of two oligo-p-phenylene ethynylenes (OPEs), anionic OPE 1 2- and cationic OPE 2 4+ , as stains for fibrillar protein pathology in brain sections of transgenic mouse (rTg4510) and rat (TgF344-AD) models of Alzheimer's disease (AD) tauopathy, and post-mortem brain sections from human frontotemporal dementia (FTD). OPE 1 2- displayed selectivity for PHFs in fluorimetry assays and strong staining of neurofibrillary tangles (NFTs) in mouse and human brain tissue sections, while OPE 2 4+ stained both NFTs and Aβ plaques. Both OPEs stained the brain sections with limited background or non-specific staining. This novel family of sensors outperformed the gold-standard dye Thioflavin T in sensing capacities and co-stained with conventional phosphorylated tau (AT180) and Aβ (4G8) antibodies. As the OPEs readily bind protein amyloids in vitro and ex vivo, they are selective and rapid tools for identifying proteopathic inclusions relevant to AD. Such OPEs can be useful in understanding pathogenesis and in creating in vivo diagnostically relevant detection tools for neurodegenerative diseases.
Databáze: MEDLINE
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