Memories are remarkably persistent, but rely on transient signaling. The prion-like properties of CPEB suggested a solution to this problem. The paper by Krüttner et al. (2012) in this issue of Neuron demonstrates that the prion-like domain of Drosophila CPEB functions independently of its RNA-binding domain for memory.
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http://dx.doi.org/10.1016/j.neuron.2012.10.001 | DOI Listing |
ACS Chem Neurosci
June 2024
Department of Biochemistry & Cell Biology, Boston University Chobanian & Avedisian School of Medicine, Boston, Massachusetts 02118, United States.
Prion diseases are invariably fatal neurodegenerative diseases of humans and other animals for which there are no effective treatment options. Previous work from our laboratory identified phenethylpiperidines as a novel class of anti-prion compounds. While working to identify the molecular target(s) of these molecules, we unexpectedly discovered ten novel antiprion compounds based on their known ability to bind to the sigma receptors, σR and σR, which are currently being tested as therapeutic or diagnostic targets for cancer and neuropsychiatric disorders.
View Article and Find Full Text PDFPrion diseases are invariably fatal neurodegenerative diseases of humans and other animals for which there are no treatment options. Previous work from our laboratory identified phenethyl piperidines as novel class of anti-prion compounds. While working to identify the molecular target(s) of these molecules, we unexpectedly discovered ten novel anti-prion compounds based on their known ability to bind to the sigma receptors, σ R and R, which are currently being tested as therapeutic or diagnostic targets for cancer and neuropsychiatric disorders.
View Article and Find Full Text PDFMol Cell
November 2022
Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany; Munich Cluster for Systems Neurology (SyNergy), Munich, Germany. Electronic address:
Manifestation of aggregate pathology in Huntington's disease is thought to be facilitated by a preferential vulnerability of affected brain cells to age-dependent proteostatic decline. To understand how specific cellular backgrounds may facilitate pathologic aggregation, we utilized the yeast model in which polyQ-expanded Huntingtin forms aggregates only when the endogenous prion-forming protein Rnq1 is in its amyloid-like prion [PIN] conformation. We employed optogenetic clustering of polyQ protein as an orthogonal method to induce polyQ aggregation in prion-free [pin] cells.
View Article and Find Full Text PDFMolecules
January 2022
Department of Cellular and Structural Biology, UT Health San Antonio, San Antonio, TX 78229, USA.
The unique ability to adapt and thrive in inhospitable, stressful tumor microenvironments (TME) also renders cancer cells resistant to traditional chemotherapeutic treatments and/or novel pharmaceuticals. Cancer cells exhibit extensive metabolic alterations involving hypoxia, accelerated glycolysis, oxidative stress, and increased extracellular ATP that may activate ancient, conserved prion adaptive response strategies that exacerbate multidrug resistance (MDR) by exploiting cellular stress to increase cancer metastatic potential and stemness, balance proliferation and differentiation, and amplify resistance to apoptosis. The regulation of prions in MDR is further complicated by important, putative physiological functions of ligand-binding and signal transduction.
View Article and Find Full Text PDFInt J Mol Sci
August 2021
LSU Neuroscience Center, Louisiana State University Health Science Center, New Orleans, LA 70112, USA.
The human brain and central nervous system (CNS) harbor a select sub-group of potentially pathogenic microRNAs (miRNAs), including a well-characterized NF-kB-sensitive microRNA hsa-miRNA-146a-5p (miRNA-146a). miRNA-146a is significantly over-expressed in progressive and often lethal viral- and prion-mediated and related neurological syndromes associated with progressive inflammatory neurodegeneration. These include ~18 different viral-induced encephalopathies for which data are available, at least ~10 known prion diseases (PrD) of animals and humans, Alzheimer's disease (AD) and other sporadic and progressive age-related neurological disorders.
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