p(HGNC:ADAM10)
A dramatically reduced ADAM10 protein level in the platelets of sporadic AD patients was also found to correlate with the significantly decreased sAPPalpha levels found in their platlets and cerebrospinal fluid [55] and the reduced alpha-secretase activity in the temporal cortex homogenates of AD patients [56] PubMed:21214928
A dramatically reduced ADAM10 protein level in the platelets of sporadic AD patients was also found to correlate with the significantly decreased sAPPalpha levels found in their platlets and cerebrospinal fluid [55] and the reduced alpha-secretase activity in the temporal cortex homogenates of AD patients [56] PubMed:21214928
Some studies suggest that M1 mAChR stimulation also leads to activation of ERK1/2, which can modulate alpha-secretase activity and APP processing[67, 73], PubMed:24590577
Interestingly, stimulation of M1 mAChR by agonists has been found to enhance sAPPalpha generation and reduce Abeta production[61-70]. Protein kinase C (PKC) is well-known to be activated upon stimulation of M1 mAChR. PKC may promote the activity of alpha-secretase[71] and the traffi cking of APP from the Golgi/ trans-Golgi network to the cell surface PubMed:24590577
Several zinc metallo proteinases such asTACE/ADAM17, ADAM9, ADAM10 and MDC-9 and the aspartyl protease BACE2 can cleave APP at the α-secretase site, located within the Aβ domain between Lys 16 and Leu 17 , essentially precluding the generation of intact Aβ(1). PubMed:18650430
Alternatively, APP can be cleaved by alpha-secretase within the Abeta domain to release soluble APPa and preclude Abeta generation PubMed:21214928
Alternatively, APP can be cleaved by alpha-secretase within the Abeta domain to release soluble APPa and preclude Abeta generation PubMed:21214928
Cleavage of APP by alpha-secretase precludes Abeta generation as the cleavage site is within the Abeta domain (at the Lys16- Leu17 bond), and releases a large soluble ectodomain of APP called sAPPalpha PubMed:21214928
From the TGN, APP can be transported in TGN-derived secretory vesicles to the cell surface where it is either cleaved by alpha-secretase to produce a soluble molecule, sAPPalpha [37], or re-internalized via an endosomal/ lysosomal degradation pathway [38,39] PubMed:21214928
Cleavage of APP by alpha-secretase precludes Abeta generation as the cleavage site is within the Abeta domain (at the Lys16- Leu17 bond), and releases a large soluble ectodomain of APP called sAPPalpha PubMed:21214928
Cleavage of APP by alpha-secretase precludes Abeta generation as the cleavage site is within the Abeta domain (at the Lys16- Leu17 bond), and releases a large soluble ectodomain of APP called sAPPalpha PubMed:21214928
A dramatically reduced ADAM10 protein level in the platelets of sporadic AD patients was also found to correlate with the significantly decreased sAPPalpha levels found in their platlets and cerebrospinal fluid [55] and the reduced alpha-secretase activity in the temporal cortex homogenates of AD patients [56] PubMed:21214928
A dramatically reduced ADAM10 protein level in the platelets of sporadic AD patients was also found to correlate with the significantly decreased sAPPalpha levels found in their platlets and cerebrospinal fluid [55] and the reduced alpha-secretase activity in the temporal cortex homogenates of AD patients [56] PubMed:21214928
APP can also be cleaved by alpha-secretase to form a soluble or secreted APP ectodomain (sAPP-alpha) that has been shown to be mostly neuro-protective PubMed:22122372
As APP was found to be constitutively cleaved at the alpha-site to yield sAPP-alpha (Esch et al. 1990), three members of the a disintegrin and metalloproteinase (ADAMs), ADAM-10,ADAM-17 and ADAM-9 have been proposed as the alpha-secretase (Buxbaum et al. 1998; Koike et al. 1999;Lammich et al. 1999) PubMed:22122372
APP can also be cleaved by alpha-secretase to form a soluble or secreted APP ectodomain (sAPP-alpha) that has been shown to be mostly neuro-protective PubMed:22122372
alpha-cleavage, which cuts APP at the 17th amino acid inside the Abeta peptide sequence (Fig. 1), releases a large secreted extracellular domain (sAPP-alpha) and a membrane-associated C-terminal fragment consisting of 83 amino acids (C83) PubMed:22122372
Moderate neuronal over-expression of human ADAM10 increases sAPP-alpha production while reducing Abeta generation/ plaque formation in mice carrying the human APP V717I mutation, while expression of a catalytically-inactive form of the ADAM10 mutation increases the size and number of amyloid plaques in mouse brains (Postina et al. 2004) PubMed:22122372
Moderate neuronal over-expression of human ADAM10 increases sAPP-alpha production while reducing Abeta generation/ plaque formation in mice carrying the human APP V717I mutation, while expression of a catalytically-inactive form of the ADAM10 mutation increases the size and number of amyloid plaques in mouse brains (Postina et al. 2004) PubMed:22122372
Moderate neuronal over-expression of human ADAM10 increases sAPP-alpha production while reducing Abeta generation/ plaque formation in mice carrying the human APP V717I mutation, while expression of a catalytically-inactive form of the ADAM10 mutation increases the size and number of amyloid plaques in mouse brains (Postina et al. 2004) PubMed:22122372
Abeta, an important player in AD, is derived from beta-amyloid precursor protein (APP) through sequential cleavages by beta- and gamma-secretases: APP is cleaved by beta-secretase (BACE1) to generate the large secreted derivative sAPPbeta and the membrane-bound APP C-terminal fragment-beta; the latter can be further cleaved by gamma-secretase to generate Abeta and APP intracellular domain. Alternatively, APP can be cleaved by alpha-secretase within the Abeta domain, which precludes Abeta production and instead generates secreted sAPPalpha that has been shown to be neuroprotective PubMed:24590577
Abeta, an important player in AD, is derived from beta-amyloid precursor protein (APP) through sequential cleavages by beta- and gamma-secretases: APP is cleaved by beta-secretase (BACE1) to generate the large secreted derivative sAPPbeta and the membrane-bound APP C-terminal fragment-beta; the latter can be further cleaved by gamma-secretase to generate Abeta and APP intracellular domain. Alternatively, APP can be cleaved by alpha-secretase within the Abeta domain, which precludes Abeta production and instead generates secreted sAPPalpha that has been shown to be neuroprotective PubMed:24590577
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If you find BEL Commons useful in your work, please consider citing: Hoyt, C. T., Domingo-Fernández, D., & Hofmann-Apitius, M. (2018). BEL Commons: an environment for exploration and analysis of networks encoded in Biological Expression Language. Database, 2018(3), 1–11.