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DDR1 and MT1-MMP Expression Levels Are Determinant for Triggering BIK-Mediated Apoptosis by 3D Type I Collagen Matrix in Invasive Basal-Like Breast Carcinoma Cells
In conclusion, and in agreement with the other studies (Ford et al., 2007; Koh et al., 2015; Toy et al., 2015; Takai et al., 2018), our data suggest that during the acquisition of mesenchymal features, the level of full-length DDR1 expression should be considered, in addition to the other markers, as an important biomarker in the prognosis of aggressive breast carcinomas. As summarized in Figure 9, the regulation of cell proliferation and apoptosis by the collagen/DDR1 axis involves a differential activation of DDR1 signaling pathway and thus BIK expression. In the case of the basal-like bre...
Source: Frontiers in Pharmacology - May 2, 2019 Category: Drugs & Pharmacology Source Type: research

Modulation of A-type K(+) channels by the short-chain cobrotoxin through the protein kinase C-delta isoform decreases membrane excitability in dorsal root ganglion neurons.
In this study, we identified the functional role of cobrotoxin, the short-chain α-neurotoxin isolated from Naja atra venom, which acts in the regulation of the transient A-type K(+) currents (I(A)) and membrane excitability in dorsal root ganglion (DRG) neurons via the activation of the muscarinic M3 receptor (M3R). Our results showed that cobrotoxin increased I(A) in a concentration-dependent manner, whereas the sustained delayed rectifier K(+) currents (I(DR)) were not affected. Cobrotoxin did not affect the activation of I(A) markedly, however, it shifted the inactivation curve significantly in the depolarizing directi...
Source: Biochemical Pharmacology - February 19, 2013 Category: Drugs & Pharmacology Authors: Guo Q, Jiang YJ, Jin H, Jiang XH, Gu B, Zhang YM, Wang JG, Qin ZH, Tao J Tags: Biochem Pharmacol Source Type: research