SP600125

Cell viability was quantified using a tetrazolium-based colorimetric assay and apoptosis was evaluated by the Muse® Annexin V & Dead Cell assay based on Annexin V and 7-amino-actinomycin D staining; the expression levels of JNK, p38, ERK, beclin-1, microtubule-associated protein 1 light chain 3B (LC3B), p62/sequestosome 1 (SQSTM1) and poly (ADP-ribose) polymerase (PARP) were assessed by western blotting. Pharmacological inhibition with SP600125 attenuated JNK phosphorylation, reduced apoptotic responses and diminished autophagy-associated marker accumulation, supporting the notion that JNK signaling contributes, at least in part, to these effects. These findings indicate that RTA-408 exerts nanomolar antiproliferative activity in both hormone receptor-positive and triple-negative BC cells through a JNK-dependent mechanism that simultaneously engages apoptosis and autophagy, supporting further in vivo and translational investigation.

Cucurbitacin B-induced TNF-R1 shedding was attenuated by TNF-α protease inhibitor 2 and the mitogen-activated protein kinase (MAPK)/extracellular signal-regulated kinase (ERK) kinase (MEK) inhibitor U0126, but not by the p38 MAPK inhibitor SB203580 or the c-Jun N-terminal kinase (JNK) inhibitor SP600125. Consistent with these results, cucurbitacin B promoted the rapid phosphorylation of rapidly accelerated fibrosarcoma 1 (RAF1) and ERK, but exerted minimal effects on the phosphorylation of p38 MAPK and JNK. Collectively, these results demonstrate that cucurbitacin B selectively activated the RAF1-MEK-ERK pathway, which was essential for TNF-R1 ectodomain shedding.

Collectively, these findings demonstrate that CD30L critically regulates asthma airway remodeling via the JNK/p38 MAPK pathway, strongly suggesting its therapeutic potential as a target for airway remodeling in asthma.

Pretreatment with the specific JNK inhibitor SP600125 reversed the increases cleaved PARP and caspase-3/-7 caused by gelsemine...The results of the present study collectively suggested that gelsemine induces apoptosis through a ROS- and JNK1/2 -co-regulated pathway. To the best of our knowledge, this study is the first to demonstrate that gelsemine may be a potential therapeutic agent for tongue SCC.

In addition, HM specifically inhibited uPAR expression levels, which were also decreased by the pharmacological mitogen-activated protein kinase (MAPK) kinase (MEK) inhibitor UO126 and Jun N-terminal kinase (JNK) inhibitor SP600125, in both CRC cell lines, including metastatic CRC (mCRC) SW620 cell line. Addition of HM to cells pretreated with JNK and MEK inhibitors attenuated the blockade of JNK and ERK phosphorylation and alleviated HM-downregulated uPAR expression and HM-inhibited mCRC cell migration. In conclusion, our in vitro studies demonstrate that HM exhibits an inhibitory effect on CRC migration and invasiveness, associated with uPAR downregulation through JNK and ERK pathways.

Specific inhibitors (SP600125, SB203580, NAC, Z-vad-fmk) were employed to validate the underlying mechanisms...Sch A selectively induces apoptosis in ESCC cells through ROS-JNK/p38-mediated pathways, mitochondrial dysfunction, and cell cycle arrest. These findings indicate that Sch A is a promising therapeutic candidate for treating ESCC.

This study demonstrates that YFBP exerts significant anti-OC therapeutic effects by modulating the inflammatory TME and activating the JNK/c-Jun pathway. Our findings provide a pharmacological basis for the traditional use of YFBP and highlight its potential as a promising candidate phytomedicine for OC therapy.

Pharmacological inhibition of integrin α2β1 (BTT-3033), FAK (PF573228) and JNK (SP600125) effectively abrogated PDA-induced malignant phenotypes and restored chemosensitivity to cabazitaxel, cisplatin, docetaxel, curcumin, and enzalutamide. Collectively, these findings identify PDA-coated surfaces as a simple, efficient, and reductionist in vitro platform for studying adhesion-mediated signaling and phenotypic plasticity in PC cells, while acknowledging that further validation in three-dimensional (3D) and patient-derived models will be required to establish in vivo relevance.

As the nuclear translocation of RB1CC1 was promoted by the JNK signaling pathway, SP600125, a JNK inhibitor, prevented the MPD-induced RB1CC1 nuclear translocation. In summary, MPD induced the dissociation of RB1CC1 from DRMs and its subsequent nuclear translocation, contributing to ferroptosis of prostate cancer cells.

The autophagy inhibitor chloroquine enhanced the pro-apoptotic effect of B. rynchopetera. Additionally, the c-Jun N-terminal kinase(JNK) inhibitor(SP600125) suppressed the activation of the JNK pathway as well as B. rynchopetera-induced apoptosis and autophagy. In conclusion, B. rynchopetera activates the MAPK/JNK pathway to induce apoptosis and autophagy, thereby exerting the therapeutic effect on LUAD.

WB was used to assess activation of the c-Jun N-terminal kinase (JNK)/p38 mitogen-activated protein kinase (MAPK) pathway, and pathway dependence was examined using the ROS scavenger N-Acetylcysteine (NAC) and the JNK inhibitor SP600125. It exerts anti-tumor effects by inducing oxidative stress and activating the JNK/p38 MAPK pathway in a ROS-dependent manner. These findings suggest that CSRNP1 may serve as a potential therapeutic target in the management of HCC.

Inhibition of JNK with SP600125 reversed PPD-induced apoptosis, indicating that JNK signaling plays a critical role...Our findings revealed that PPD exerts potent anti-melanoma effects by directly targeting MLK3 and activating the MLK3-JNK signaling pathway, leading to apoptosis. These results provide novel insights into the molecular mechanism of PPD and suggest its potential as a therapeutic agent for melanoma treatment.