These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Loss of anti-Bax function in Gerstmann-Sträussler-Scheinker syndrome-associated prion protein mutants.
    Author: Jodoin J, Misiewicz M, Makhijani P, Giannopoulos PN, Hammond J, Goodyer CG, LeBlanc AC.
    Journal: PLoS One; 2009 Aug 14; 4(8):e6647. PubMed ID: 19680558.
    Abstract:
    Previously, we have shown the loss of anti-Bax function in Creutzfeldt Jakob disease (CJD)-associated prion protein (PrP) mutants that are unable to generate cytosolic PrP (CyPrP). To determine if the anti-Bax function of PrP modulates the manifestation of prion diseases, we further investigated the anti-Bax function of eight familial Gerstmann-Sträussler-Scheinker Syndrome (GSS)-associated PrP mutants. These PrP mutants contained their respective methionine ((M)) or valine ((V)) at codon 129. All of the mutants lost their ability to prevent Bax-mediated chromatin condensation or DNA fragmentation in primary human neurons. In the breast carcinoma MCF-7 cells, the F198S(V), D202N(V), P102L(V) and Q217R(V) retained, whereas the P102L(M), P105L(V), Y145stop(M) and Q212P(M) PrP mutants lost their ability to inhibit Bax-mediated condensed chromatin. The inhibition of Bax-mediated condensed chromatin depended on the ability of the mutants to generate cytosolic PrP. However, except for the P102L(V), none of the mutants significantly inhibited Bax-mediated caspase activation. These results show that the cytosolic PrP generated from the GSS mutants is not as efficient as wild type PrP in inhibiting Bax-mediated cell death. Furthermore, these results indicate that the anti-Bax function is also disrupted in GSS-associated PrP mutants and is not associated with the difference between CJD and GSS.
    [Abstract] [Full Text] [Related] [New Search]