title: Activated protein C inhibits amyloid β production via promoting expression of ADAM-10.
abstract: Inhibition of Aβ production and clearance of senile plaques have been considered as potential strategies in the treatment of Alzheimer's disease (AD). Activated protein C (APC) is an important factor in the anticoagulant system. However, whether APC can influence the condition of a chronic neurodegenerative process, such as that present in AD, is unknown. In this study, we found that administration of APC on AD Tg2576 mice significantly reduced amyloid β production and helped to facilitate cognitive improvement. APC could also reduce levels of Aβ40 and Aβ42 produced in APPswe cells, an AD cell model. Further results demonstrated that APC did not change the levels of Aβ-degrading enzymes, insulin-degrading enzyme (IDE), or neprilysin (NEP). Next, we found that APC promoted sAPPα and CTFα release and inhibited sAPPβ and CTFβ release, thereby indicating that APC could regulate Aβ secretion by shifting APP processing from the amyloidogenic pathway toward the nonamyloidogenic pathway. Correspondingly, further study revealed that ADAM-10 expression was increased by APC, suggesting that APC inhibits Aβ secretion through stimulating activity of α-secretase. These findings support the idea that APC could hold therapeutic potential in the treatment of AD.
authors: Department of Neurology, The Affiliated Yantai Yuhuangding Hospital of Medical School of Qingdao University, Yantai, Shandong 264000, China.
authors: Bing
authors: B
authors: Li
authors: Department of Cardiology, Yantaishan Hospital, Yantai, Shandong 264000, China.
authors: Dawei
authors: D
authors: Yu
authors: Department of Cardiology, Yantaishan Hospital, Yantai, Shandong 264000, China. Electronic address: zyxu0115@hotmail.com.
authors: Zhiying
authors: Z
authors: Xu
mesh_terms: D051722:ADAM Proteins / Q000378:metabolism*; D000072197:ADAM10 Protein; D000544:Alzheimer Disease / Q000188:drug therapy / Q000378:metabolism*; D053829:Amyloid Precursor Protein Secretases / Q000378:metabolism*; D016229:Amyloid beta-Peptides / Q000378:metabolism*; D016564:Amyloid beta-Protein Precursor / Q000378:metabolism; D000818:Animals; D000925:Anticoagulants / Q000494:pharmacology*; D004195:Disease Models, Animal; D006801:Humans; D007339:Insulysin / Q000378:metabolism; D018782:Maze Learning / Q000187:drug effects; D008565:Membrane Proteins / Q000378:metabolism*; D051379:Mice; D008810:Mice, Inbred C57BL; D008822:Mice, Transgenic; D015260:Neprilysin / Q000378:metabolism; D011486:Protein C / Q000378:metabolism / Q000494:pharmacology*
chemical_list: D016229:Amyloid beta-Peptides; D016564:Amyloid beta-Protein Precursor; D000925:Anticoagulants; D008565:Membrane Proteins; D011486:Protein C; D053829:Amyloid Precursor Protein Secretases; D051722:ADAM Proteins; D015260:Neprilysin; D007339:Insulysin; D000072197:ADAM10 Protein; C491236:ADAM10 protein, human; C491234:Adam10 protein, mouse
keywords: ADAM-10; APP processing; Activated protein C; Alzheimer's disease; Amyloid beta