Abstract:
:Human G93A-superoxide dismutase-1 (G93AhSOD1) mutation causes amyotrophic lateral sclerosis (ALS) in rodents and humans. Recent observations indicate gain of interaction of G93AhSOD1 with cytosolic malate dehydrogenase (MDH1) and subsequent impairment in the malate aspartate shuttle which is vital to neurons. Using fluorescence resonance energy transfer (FRET), we screened an MDH1 derived peptide library for a decoy that would interrupt the G93AhSOD1-MDH1 interaction. A specific 23 amino acid blocker of this interaction was thus discovered, and interruption of interaction was confirmed by pull-down immunoprecipitation studies. A cell permeable 5-carboxytetramethylrhodamine derivative of the decoy peptide improved ATP content of motor neuron derived NSC-34 cells expressing G93AhSOD1 and enhanced cell survival under rotenone and low glucose challenges. Decoy agents capable of interrupting the gain of toxic interaction of G93AhSOD1 with MDH1 provide further evidence for the role of malate aspartate shuttle inhibition in G93AhSOD1 toxicity and a promising new route in ALS drug research.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Mali Y,Zisapel Ndoi
10.1021/jm900631msubject
Has Abstractpub_date
2009-09-10 00:00:00pages
5442-8issue
17eissn
0022-2623issn
1520-4804journal_volume
52pub_type
杂志文章abstract::A critical early event in the inflammatory cascade is the induced expression of cell adhesion molecules on the lumenal surface of vascular endothelial cells. These adhesion molecules include E-selectin, ICAM-1, and VCAM-1, which serve to recruit circulating leukocytes to the site of the inflammation. These adhesive in...
journal_title:Journal of medicinal chemistry
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