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Extraction of Non-Protein Amino Acids from Cyanobacteria for Liquid Chromatography-Tandem Mass Spectrometry Analysis
Published on: December 9, 2022
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NAP alpha-aminoisobutyric acid (IsoNAP).
Illana Gozes1, Yulie Schirer, Anat Idan-Feldman
1The Adams Super Center for Brain Studies and Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, 69978, Israel, igozes@post.tau.ac.il.
Journal of Molecular Neuroscience : MN
|January 25, 2014
Summary
A new analog of NAP (davunetide), called IsoNAP, shows promise in protecting against neurodegeneration and cognitive decline. This novel peptide reduces amyloid-beta toxicity and tau aggregation, key factors in Alzheimer's disease.
Area of Science:
- Neuroscience
- Pharmacology
- Biochemistry
Background:
- NAP (davunetide) is a drug candidate demonstrating neuroprotective effects and cognitive benefits in mild cognitive impairment and schizophrenia.
- Protein misfolding, particularly amyloid-beta and tau pathology, is central to Alzheimer's disease (AD) pathogenesis.
- Previous analogs like D-NAP have shown efficacy, prompting further exploration of NAP derivatives.
Purpose of the Study:
- To design and evaluate a novel NAP analog, IsoNAP, with enhanced beta-sheet breaker characteristics to reduce protein misfolding.
- To assess IsoNAP's neuroprotective effects against amyloid-beta toxicity and its ability to inhibit tau aggregation.
- To investigate IsoNAP's cognitive protective potential in a mouse model relevant to ADNP deficiency and tau pathology.
Main Methods:
- Cell culture studies to evaluate protection against amyloid-beta (Aβ1-42) toxicity.
- In vitro assays to assess inhibition of tau aggregation using the VQIVYK peptide.
- Cognitive testing in a mouse model with deficiencies in activity-dependent neuroprotective protein (ADNP), exhibiting tau pathology.
Main Results:
- IsoNAP demonstrated significant neuroprotection against Aβ1-42 toxicity in cell cultures.
- IsoNAP effectively inhibited the in vitro aggregation of the tau-derived peptide VQIVYK.
- IsoNAP provided cognitive protection in a mouse model characterized by tau pathology and neurodegeneration.
Conclusions:
- The novel NAP analog, IsoNAP, exhibits potent neuroprotective and anti-aggregation properties relevant to Alzheimer's disease.
- IsoNAP's ability to reduce tau pathology and protect cognitive function highlights its potential as a therapeutic agent for tauopathies.
- Further development of IsoNAP is warranted for its potential clinical application in neurodegenerative disorders like Alzheimer's disease.
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