a(MESH:Cathepsins)
Acid hydrolases, including cathepsins, are delivered from the trans-Golgi network (TGN) to MVBs/late endosomes by either of two mannose-6- phosphate receptors: cation-dependent 46 kDa MPR (CD-MPR) and cation-independent 215 kDa MPR (CI-MPR; Mullins et al. 2001). PubMed:22908190
Acid hydrolases, including cathepsins, are delivered from the trans-Golgi network (TGN) to MVBs/late endosomes by either of two mannose-6- phosphate receptors: cation-dependent 46 kDa MPR (CD-MPR) and cation-independent 215 kDa MPR (CI-MPR; Mullins et al. 2001). PubMed:22908190
Beyond its role as a component of g-secretase, Presenilin 1 (PS1) is required for lysosome acidification, which is needed to activate cathepsins and other hydrolases that carry out digestion during autophagy (Lee et al. 2010). PubMed:22908190
Although less well studied as “Ab degrading proteases” than the zinc metallopeptidase family (Guenette 2003; Eckman et al. 2005), cathepsins are considered an important route for Ab/amyloid clearance (Mueller-Steiner et al. 2006; Nixon 2007; Butler et al. 2011) and human neurons may be particularly dependent on this mechanism (LeBlanc et al. 1999; reviewed in Saido and Leissring 2011). PubMed:22908190
Cataclysmic disruption of lysosomal membranes releases hydrolases that act as both the trigger and executioner in rapid necrosis (Syntichaki et al. 2003; Kroemer et al. 2005), whereas slow release of cathepsins more likely operates through signaling pathways to trigger apoptosis (Kroemer et al. 2005). PubMed:22908190
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