Kazuma Shimanaka

ORCID: 0000-0001-9786-3571
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About
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Research Areas
  • Parkinson's Disease Mechanisms and Treatments
  • Cancer Genomics and Diagnostics
  • Microtubule and mitosis dynamics
  • Alzheimer's disease research and treatments
  • Neuroscience and Neuropharmacology Research
  • Chromosomal and Genetic Variations
  • Advanced biosensing and bioanalysis techniques
  • Genomics and Chromatin Dynamics
  • Neurological disorders and treatments
  • Cholinesterase and Neurodegenerative Diseases
  • RNA Interference and Gene Delivery
  • Microbial Metabolic Engineering and Bioproduction
  • Lipoproteins and Cardiovascular Health
  • Cellular transport and secretion
  • Biotin and Related Studies
  • Dendrimers and Hyperbranched Polymers
  • Neurological diseases and metabolism
  • Nuclear Receptors and Signaling
  • biodegradable polymer synthesis and properties
  • Nerve injury and regeneration
  • Genetics, Bioinformatics, and Biomedical Research
  • Synthesis and Characterization of Heterocyclic Compounds

University of Michigan
2021-2024

Brigham and Women's Hospital
2021-2023

Harvard University
2021-2023

Abstract In Parkinson’s disease and other synucleinopathies, the elevation of α-synuclein phosphorylated at Serine129 (pS129) is a widely cited marker pathology. However, physiological role for pS129 has remained undefined. Here we use multiple approaches to show first time that functions as regulator neuronal activity. Neuronal activity triggers sustained increase in cultured neurons (200% within 4 h). accord, brain elevated environmentally enriched mice exhibiting enhanced long-term...

10.1038/s41531-023-00444-w article EN cc-by npj Parkinson s Disease 2023-01-16

Protein misfolding results in a plethora of known diseases such as Alzheimer’s disease, Parkinson’s Huntington’s transthyretin-related amyloidosis, type 2 diabetes, Lewy body dementia, and spongiform encephalopathy. To provide diverse portfolio therapeutic small molecules with the ability to reduce protein misfolding, we evaluated set 13 compounds: 4-(benzo[d]thiazol-2-yl)aniline (BTA) its derivatives containing urea (1), thiourea (2), sulfonamide (3), triazole (4), triazine (5) linker. In...

10.1021/acsomega.3c02668 article EN cc-by ACS Omega 2023-05-23

Increasing evidence has shown that Parkinson's disease (PD) impairs midbrain dopaminergic, cortical and other neuronal subtypes in large part due to the build-up of lipid- vesicle-rich α-synuclein (αSyn) cytotoxic inclusions. We previously identified stearoyl-CoA desaturase (SCD) as a potential therapeutic target for synucleinopathies. A brain-penetrant SCD inhibitor, YTX-7739, was developed entered Phase 1 clinical trials. Here, we report efficacy YTX-7739 reversing pathological αSyn...

10.1007/s13311-022-01199-7 article EN cc-by Neurotherapeutics 2022-04-01

Alzheimer's disease (AD) is a multifactorial, chronic neurodegenerative characterized by the presence of extracellular β-amyloid (Aβ) plaques, intraneuronal neurofibrillary tangles (NFTs), activated microglial cells, and an inflammatory state (involving reactive oxygen species production) in brain. NFTs are comprised misfolded hyperphosphorylated forms microtubule-binding protein tau. Interestingly, trimeric form 2N4R splice isoform tau has been found to be more toxic than 1N4R neuron...

10.1016/j.rechem.2023.100938 article EN cc-by Results in Chemistry 2023-01-01

Alzheimer's disease (AD) is the most prevalent neurodegenerative disorder underlying dementia in geriatric population. AD manifests by two pathological hallmarks: extracellular amyloid-β (Aβ) peptide-containing senile plaques and intraneuronal neurofibrillary tangles comprised of aggregated hyperphosphorylated tau protein (p-tau). However, more than half cases also display presence α-synuclein (α-syn)-containing Lewy bodies. Conversely, bodies disorders have been reported to concomitant Aβ...

10.1021/acschemneuro.3c00464 article EN cc-by-nc-nd ACS Chemical Neuroscience 2023-10-11

Abstract The centromere, defined by the enrichment of CENP-A (a Histone H3 variant) containing nucleosomes, is a specialised chromosomal locus that acts as microtubule attachment site. To preserve centromere identity, levels must be maintained through active loading during cell cycle. A central player mediating this process Mis18 complex (Mis18α, Mis18ý and Mis18BP1), which recruits specific chaperone HJURP to centromeres for deposition. Here, using multi-pronged approach, we characterise...

10.1101/2021.11.08.466737 preprint EN cc-by bioRxiv (Cold Spring Harbor Laboratory) 2021-11-08

The neuronal protein α‐synuclein is centrally involved in the neurodegeneration occurring Parkinson's disease and related synucleinopathies. α‐Synuclein's membrane‐induced 3–11 helix conformation has a hydrophobic membrane‐embedded half hydrophilic cytosolic half. Here, we studied significance of (a) surprising hydrophobicity amino‐acids at cytosol‐exposed position 8; (b) absence positively charged lysine/arginine from all positions (1‐5‐8‐9). We found that further increasing or adding...

10.1002/1873-3468.14773 article EN FEBS Letters 2023-11-21
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