p(HGNC:CASP3)
However, C31, a short form of AICD generated by caspase cleavage, has been reported to directly activate caspase 3 in the tumor cell death process (Lu et al. 2000; Bertrand et al. 2001; Nishimura et al. 2002; Madeira et al. 2005) PubMed:22122372
Spermidine inhibits the acetylation of ATG7 and histone H3, while induc- ing beclin 1 via blockade of its cleavage by caspase 3 (REF.168) . PubMed:30116051
Thrombin signaling can also activate caspases (36). Proteasomal impairment appears to be upstream of caspase activation, as inhibiting the proteasome with epoxomicin (EPX) led to activation of caspase-3 in primary neurons (63) and in a neuroblastoma cell line expressing wild-type tau (64). PubMed:24027553
In order for caspase to cleave tau in the AD brain, it needs to be present in its active form. The active forms of both caspase-3 and caspase-6 are elevated in AD-specific brain regions (temporal and frontal lobes) compared to unaffected regions (cerebellum) and control brains (57, 58). PubMed:24027553
MB is a phenothiazine that crosses the blood brain barrier and acts as a redox cycler. Moreover, besides its beneficial properties as being able to improve energy metabolism and to act as an antioxidant, it is also able to reduce tau protein aggregation PubMed:26751493
Overexpression of wild-type UNC5C causes low-grade death, intensified by an AD-linked mutation T835M inhibited by a AD-linked survival factor, calmodulin-like skin protein (CLSP), and a natural ligand of UNC5C, netrin1. T835M-UNC5C-induced neuronal cell death is mediated by an intracellular death-signaling cascade, consisting of DAPK1/protein kinase D/apoptosis signal-regulating kinase 1 (ASK1)/JNK/NADPH oxidase/caspases, which merges at ASK1 with a death-signaling cascade, mediated by amyloid ß precursor protein (APP). PubMed:27068745
Overexpression of wild-type UNC5C causes low-grade death, intensified by an AD-linked mutation T835M inhibited by a AD-linked survival factor, calmodulin-like skin protein (CLSP), and a natural ligand of UNC5C, netrin1. T835M-UNC5C-induced neuronal cell death is mediated by an intracellular death-signaling cascade, consisting of DAPK1/protein kinase D/apoptosis signal-regulating kinase 1 (ASK1)/JNK/NADPH oxidase/caspases, which merges at ASK1 with a death-signaling cascade, mediated by amyloid ß precursor protein (APP). PubMed:27068745
NO can also bring about apoptosis of hippocampal neurons via caspase- 3 activity [50] whereas astrocyte-secreted IL-1 beta can increase the production of APP and A beta from neu- rons [51–53] (Fig. 1). PubMed:27314526
In another study, neurons from Tg mAPP/ABAD mice were shown to exhibit decreased activity of cyclooxygenase (COX) enzyme, spontaneous release of ROS, loss of mitochondrial membrane potential, a decrease in ATP production and release of cytochrome c from mitochondria with subsequent induction of caspase-3-like activity followed by apoptotic cell death. PubMed:30444369
To address this question, we first applied the oligomers directly after the purification of the protein eluting from the Butyl FF 16/ 10 column (without buffer exchange; 1, 5, and 10 mM) to SHSY5Y cells and observed a variety of toxic effects, including pronounced reduction in the cell viability (by MTT assay, Fig. 3A), increase in apoptotic cells (by Hoechst staining, Supplementary Fig. 4A), loss of mitochondrial membrane potential (by JC1 assay, Supplementary Fig. 4B), caspase 3/7 activation (Supplementary Fig. 4C-D), and cytochrome-c release (Supplementary Fig. 4), within 5 hours of incubation. PubMed:28528849
CHIP is also implicated in regulation of Caspase 3 activity PubMed:25374103
Tau overexpression increased active caspase 3 levels, and co-expression of CHIP reduced cleaved caspase 3 levels compared to tau expression alone (Fig. 3). PubMed:25374103
Tau overexpression increased active caspase 3 levels, and co-expression of CHIP reduced cleaved caspase 3 levels compared to tau expression alone (Fig. 3). PubMed:25374103
Spermidine inhibits the acetylation of ATG7 and histone H3, while induc- ing beclin 1 via blockade of its cleavage by caspase 3 (REF.168) . PubMed:30116051
There is significant evidence that tau is a caspase substrate and that caspase-mediated tau cleavage may play a role in AD pathology. Early in vitro studies demonstrated that tau is cleaved in the C-terminus by several caspases including caspase-3 and caspase-6 (21–23). PubMed:24027553
There may be reciprocity with the apoptosis pathway as activating caspase-3 by inducing apoptosis in cortical neuronal culture led to tau cleavage (22), and selectively expressing tauC3 led to apoptosis in NT2 and COS cells (21). This might represent a feed-forward loop of neurotoxicity. PubMed:24027553
There may be reciprocity with the apoptosis pathway as activating caspase-3 by inducing apoptosis in cortical neuronal culture led to tau cleavage (22), and selectively expressing tauC3 led to apoptosis in NT2 and COS cells (21). This might represent a feed-forward loop of neurotoxicity. PubMed:24027553
Caspase cleavage of tau may play a role in stimulating the tau aggregation seen in AD. Indeed, in vitro polymerization assays demonstrate that caspase-cleaved tau has a greater propensity to aggregate compared to full-length tau (23, 55). PubMed:24027553
In order for caspase to cleave tau in the AD brain, it needs to be present in its active form. The active forms of both caspase-3 and caspase-6 are elevated in AD-specific brain regions (temporal and frontal lobes) compared to unaffected regions (cerebellum) and control brains (57, 58). PubMed:24027553
Furthermore, caspase-3 cleavage at D421 increases tau release PubMed:29238289
Overexpression of wild-type UNC5C causes low-grade death, intensified by an AD-linked mutation T835M inhibited by a AD-linked survival factor, calmodulin-like skin protein (CLSP), and a natural ligand of UNC5C, netrin1. T835M-UNC5C-induced neuronal cell death is mediated by an intracellular death-signaling cascade, consisting of DAPK1/protein kinase D/apoptosis signal-regulating kinase 1 (ASK1)/JNK/NADPH oxidase/caspases, which merges at ASK1 with a death-signaling cascade, mediated by amyloid ß precursor protein (APP). PubMed:27068745
Overexpression of wild-type UNC5C causes low-grade death, intensified by an AD-linked mutation T835M inhibited by a AD-linked survival factor, calmodulin-like skin protein (CLSP), and a natural ligand of UNC5C, netrin1. T835M-UNC5C-induced neuronal cell death is mediated by an intracellular death-signaling cascade, consisting of DAPK1/protein kinase D/apoptosis signal-regulating kinase 1 (ASK1)/JNK/NADPH oxidase/caspases, which merges at ASK1 with a death-signaling cascade, mediated by amyloid ß precursor protein (APP). PubMed:27068745
Overexpression of wild-type UNC5C causes low-grade death, intensified by an AD-linked mutation T835M inhibited by a AD-linked survival factor, calmodulin-like skin protein (CLSP), and a natural ligand of UNC5C, netrin1. T835M-UNC5C-induced neuronal cell death is mediated by an intracellular death-signaling cascade, consisting of DAPK1/protein kinase D/apoptosis signal-regulating kinase 1 (ASK1)/JNK/NADPH oxidase/caspases, which merges at ASK1 with a death-signaling cascade, mediated by amyloid ß precursor protein (APP). PubMed:27068745
NO can also bring about apoptosis of hippocampal neurons via caspase- 3 activity [50] whereas astrocyte-secreted IL-1 beta can increase the production of APP and A beta from neu- rons [51–53] (Fig. 1). PubMed:27314526
For example, levels of Beclin 1, a key component of the class III type phosphoinositide 3-kinase/VPS34 complex essential to the pre-autophagosomal structure (PAS), has been suggested to be reduced in AD brains [16,17], with Rohn et al. demonstrating the cleavage of Beclin 1 by caspase-3 in the AD brain and colocalization of the cleaved product with NFTs [16]. PubMed:29758300
Tau overexpression increased active caspase 3 levels, and co-expression of CHIP reduced cleaved caspase 3 levels compared to tau expression alone (Fig. 3). PubMed:25374103
Tau overexpression increased active caspase 3 levels, and co-expression of CHIP reduced cleaved caspase 3 levels compared to tau expression alone (Fig. 3). PubMed:25374103
For instance, the phosphorylation of tau at Ser422 inhibits the cleavage of tau by caspase 3 at Asp421 PubMed:26631930
In human AD brains and in the Tg4510 tauopathy mouse model, full-length tau is cleaved by caspase 3 behind Asp421 to generate tau1–421, which is prone to aggregation and subsequent formation of NFTs PubMed:26631930
BEL Commons is developed and maintained in an academic capacity by Charles Tapley Hoyt and Daniel Domingo-Fernández at the Fraunhofer SCAI Department of Bioinformatics with support from the IMI project, AETIONOMY. It is built on top of PyBEL, an open source project. Please feel free to contact us here to give us feedback or report any issues. Also, see our Publishing Notes and Data Protection information.
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.