Genetic cathepsin B deficiency reduces beta-amyloid in transgenic mice expressing human wild-type amyloid precursor protein.

Genetic cathepsin B deficiency reduces beta-amyloid in transgenic mice expressing human wild-type amyloid precursor protein.
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DOI:
10.1016/j.bbrc.2009.05.131
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发表时间:
2009-08-21
影响因子:
3.1
通讯作者:
Hook, Gregory
Hook, Gregory
中科院分区:
生物学4区
文献类型:
--
作者:
Hook, Vivian Y. H.;Kindy, Mark;Reinheckel, Thomas;Peters, Christoph;Hook, Gregory

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Neurotoxic β-amyloid (Aβ) peptides participate in Alzheimer’s disease (AD); therefore, reduction of Aβ generated from APP may provide a therapeutic approach for AD. Gene knockout studies in transgenic mice producing human Aβ may identify targets for reducing Aβ. This study shows that knockout of the cathepsin B gene in mice expressing human wild-type APP (hAPPwt) results in substantial decrease of Aβ40 and Aβ42 by 67% in brain, and decreases levels of the C-terminal β-secretase fragment (CTFβ) derived from APP. In contrast, knockout of cathepsin B in mice expressing hAPP with the rare Swedish (Swe) and Indiana (Ind) mutations had no effect on Aβ. The difference in reduction of Aβ in hAPPwt mice, but not in hAPPSwe/Ind mice, shows that the transgenic model can affect cathepsin B gene knockout results. Since most AD patients express hAPPwt, these data validate cathepsin B as a target for development of inhibitors to lower Aβ in AD.
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