Literature DB >> 19299585

gamma-Secretase heterogeneity in the Aph1 subunit: relevance for Alzheimer's disease.

Lutgarde Serneels1, Jérôme Van Biervliet, Katleen Craessaerts, Tim Dejaegere, Katrien Horré, Tine Van Houtvin, Hermann Esselmann, Sabine Paul, Martin K Schäfer, Oksana Berezovska, Bradley T Hyman, Ben Sprangers, Raf Sciot, Lieve Moons, Mathias Jucker, Zhixiang Yang, Patrick C May, Eric Karran, Jens Wiltfang, Rudi D'Hooge, Bart De Strooper.   

Abstract

The gamma-secretase complex plays a role in Alzheimer's disease and cancer progression. The development of clinically useful inhibitors, however, is complicated by the role of the gamma-secretase complex in regulated intramembrane proteolysis of Notch and other essential proteins. Different gamma-secretase complexes containing different Presenilin or Aph1 protein subunits are present in various tissues. Here we show that these complexes have heterogeneous biochemical and physiological properties. Specific inactivation of the Aph1B gamma-secretase in a mouse Alzheimer's disease model led to improvements of Alzheimer's disease-relevant phenotypic features without any Notch-related side effects. The Aph1B complex contributes to total gamma-secretase activity in the human brain, and thus specific targeting of Aph1B-containing gamma-secretase complexes may help generate less toxic therapies for Alzheimer's disease.

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Year:  2009        PMID： 19299585      PMCID： PMC2740474          DOI： 10.1126/science.1171176

Source DB:  PubMed          Journal:  Science        ISSN： 0036-8075            Impact factor:   47.728


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