Journal: Respiratory research
Article Title: Crosstalk between diacylglycerol kinase and protein kinase A in the regulation of airway smooth muscle cell proliferation.
doi: 10.1186/s12931-023-02465-8
Figure Lengend Snippet: Fig. 3 DGK inhibitor-induced COXII production and PKA activation is mediated via PKC-ERK1/2 signaling. Human ASM cells were pretreated with vehicle, Bis I (10 µM), U0126 (1 µM), or Vx11e (1 µM) for 10 min followed by stimulation with vehicle or DGK I (20 µM) for 24 h. Cells were lysed and immunoblotted for COXII, p-CREB, VASP, and β-actin (A). Graphical representation of mean ± SEM (n = 3–5 distinct donors) for COXII (B), p-CREB (C) and VASP (D). The densitometry data for COXII and p-CREB are normalized to basal conditions. Densitometry data for VASP phosphorylation are presented as percent (%) VASP shift (p-VASP/total VASP). *p < 0.05 (compared to vehicle basal) and #p < 0.05 (compared to DGK I basal) using one-way-ANOVA with Bonferroni post-hoc analysis. Please note that the gel images shown are cropped from the full length images
Article Snippet: Human ASM cells were plated in 12-well plates and maintained in HAM’s F-12 + 10% FBS media for 24 h. Cells were then serum-starved with HAM’s F-12 medium containing 1% ITS for 24 h followed by pre-treatment with vehicle or pan-PKC (Bis I), MEK (U0126) or ERK2 (Vx11e) inhibitor for 10 min, and then stimulated with vehicle or DGK I (20 μM) for 24 h. In a subset of experiments, cells were stimulated with vehicle or DGK I (20 μM) for 0, 5, 10, 15 and 30 min, or 24 h. Human ASM cells were lysed in RIPA buffer (CST, USA) supplemented with protease and phosphatase inhibitor (Bimake) at 4 °C for 30 min. Lysates were then mixed with Laemmli buffer (Bio-Rad) containing 10% β-mercaptoethanol and boiled at 95 °C for 5 min.
Techniques: Activation Assay, Phospho-proteomics