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Related Concept Videos

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Indirect-acting cholinergic agonists are agents that interact with the acetylcholinesterase enzyme in the synaptic cleft, preventing the breakdown of acetylcholine into choline and acetate. Consequently, the concentration of acetylcholine in the synaptic cleft increases. These agonists can be classified into reversible and irreversible inhibitors based on their duration of action.
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Bacterial cell walls are typically rigid structures composed mainly of peptidoglycan, a mesh-like polymer that provides mechanical strength and maintains cell shape. The synthesis of peptidoglycan is a crucial process in bacterial growth and serves as a primary target for many antibiotics.Mechanism of Action of Beta-Lactam AntibioticsBeta-lactam antibiotics, such as penicillin, inhibit peptidoglycan synthesis in actively growing cells. These antibiotics share a characteristic four-membered...
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Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
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Alzheimer's Disease (AD), a neurodegenerative disorder, is pathologically identified by amyloid plaques and neurofibrillary tangles composed of tau protein. AD pharmacotherapy aims to manage cognitive symptoms, delay disease progression, and treat behavioral symptoms. The treatment is primarily symptomatic and palliative, with no definitive disease-modifying therapy available. Cholinesterase inhibitors, including donepezil (Aricept), rivastigmine (Exelon), and galantamine (Razadyne), are...
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Indirect-acting cholinergic agonists work by interacting with an enzyme called acetylcholinesterase (AChE) in the synaptic cleft. They can be reversible or irreversible inhibitors and have different effects on the enzyme.
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Ligand-gated ion channels are transmembrane proteins with a channel for ions to pass through and a binding site for a ligand. The channel opens only when a ligand attaches to the binding site.
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Related Experiment Video

Updated: May 6, 2026

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γ-AApeptide-based small-molecule ligands that inhibit Aβ aggregation.

Haifan Wu1, Yaqiong Li, Ge Bai

  • 1Department of Chemistry, University of South Florida, 4202 E. Fowler Ave, Tampa, FL 33620, USA. jianfengcai@usf.edu.

Chemical Communications (Cambridge, England)
|October 26, 2013
PubMed
Summary

Researchers developed a new library of gamma-amino acid peptides (γ-AApeptides) to combat Alzheimer's disease. A specific γ-AApeptide was found to prevent and break down amyloid-beta (Aβ) protein clumps.

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Selection of Aptamers for Amyloid &#946;-Protein, the Causative Agent of Alzheimer's Disease
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Area of Science:

  • Medicinal Chemistry
  • Neuroscience
  • Biochemistry

Background:

  • Amyloid-beta (Aβ) aggregation is a hallmark of Alzheimer's disease, contributing to neurodegeneration.
  • Developing effective inhibitors of Aβ aggregation is crucial for therapeutic intervention.

Purpose of the Study:

  • To design, synthesize, and evaluate a novel class of γ-AApeptide one-bead-one-compound (OBOC) library.
  • To identify a specific γ-AApeptide with the ability to prevent and disassemble Aβ aggregation.

Main Methods:

  • Construction of a diverse γ-AApeptide OBOC library.
  • Screening of the library to identify active compounds.
  • Characterization of the identified γ-AApeptide's structure and function.
  • Evaluation of the γ-AApeptide's efficacy in preventing and disassembling Aβ aggregation.

Main Results:

  • Successful design, synthesis, and characterization of a novel γ-AApeptide OBOC library.
  • Identification of a small γ-AApeptide that effectively inhibits Aβ aggregation.
  • Demonstration of the identified γ-AApeptide's ability to disassemble pre-formed Aβ aggregates.

Conclusions:

  • The developed γ-AApeptide OBOC library is a valuable tool for discovering novel therapeutic agents.
  • The identified γ-AApeptide shows significant potential for preventing and treating Alzheimer's disease by targeting Aβ aggregation.