Blog of Signaling Pathways

Calcineurin and GSK-3 inhibition sensitizes T-cell acute lymphoblastic leukemia cells to apoptosis through X-linked inhibitor of apoptosis protein degradation

807 views | Sep 04 2017

Tosello V et al. showed that dual Cn and GSK-3 inhibitor treatment in vitro and in vivo is effective against available models of T-ALL, indicating an insofar untapped therapeutic opportunity. [Read the Full Post]

The Role of the Active Oxygen Produced from Gp91phox NADPH Oxidase on the Newborn Weight of Mouse Pups

1200 views | Sep 03 2017

Keiichi Hiramoto et al. indicated that gp91phox NADPH oxidase produces ROS during graviditas. The ROS activate NLRP3, and NLRP3 leads to the production of caspase-1, which subsequently increases IL-1, thereby finally inducing IGF-1. Because the newborn weight is determined by IGF-1, gp91phox appears to be important for promoting fetal growth during graviditas. [Read the Full Post]

IGF/STAT3/NANOG/Slug Signaling Axis Simultaneously Controls Epithelial-Mesenchymal Transition and Stemness Maintenance in Colorectal Cancer

749 views | Sep 01 2017

Yao C et al. defined the crucial functions of IGF/STAT3/NANOG/Slug signaling axis in the progression of CRC by operating EMT and CSCs properties, which make them served as potential therapeutic targets for treatment of CRC. [Read the Full Post]

Synergistic effects of selective inhibitors targeting the PI3K/AKT/mTOR pathway or NUP214-ABL1 fusion protein in human Acute Lymphoblastic Leukemia

2375 views | Sep 01 2017

Simioni C et al. showed that dephosphorylation of pAkt and pS6 showed the cytotoxicity of these compounds. Either single or combined administration of drugs against the different targets displayed inhibition of cellular viability associated with a concentration-dependent induction of apoptosis, cell cycle arrest in G0/G1 phase and autophagy, having the combined treatments a significant synergistic cytotoxic effect. Co-targeting NUP214-ABL1 fusion gene and PI3K/Akt/mTOR signaling pathway could represent a new and effective pharmacological strategy to improve the outcome in NUP214-ABL1 positive T-ALL. [Read the Full Post]

Anticancer effects of the engineered stem cells transduced with therapeutic genes via a selective tumor tropism caused by vascular endothelial growth factor toward HeLa cervical cancer cells

1032 views | Aug 31 2017

Kim HS et al. showed that GESTECs transduced with CD gene and IFN-β may provide a potential of a novel gene therapy for anticervical cancer treatments via their selective tumor tropism derived from VEGF and VEGFR2 expressions between HeLa cells and the GESTECs. [Read the Full Post]

Oncogene swap as a novel mechanism of acquired resistance to epidermal growth factor receptor-tyrosine kinase inhibitor in lung cancer

1397 views | Aug 31 2017

Mizuuchi H et al. analyzed multiple lesions from a patient who died of acquired resistance to gefitinib, then found a clinical example of an oncogene swap in which the EGFR mutation was lost and a MET gene copy was gained. In conclusion, an "oncogene swap" from EGFR to MET is a novel resistant mechanism to the EGFR-TKI. This novel mechanism should be considered in order to avoid futile inhibition of the original oncogene. [Read the Full Post]

Neuronal Soluble Fas Ligand Drives M1-Microglia Polarization after Cerebral Ischemia

0 views | Aug 30 2017

Meng HL et al. involved the activation of JAK2/STAT3 and NF-κB signaling pathways. [Read the Full Post]

Targeting of Survivin Pathways by YM155 Inhibits Cell Death and Invasion in Oral Squamous Cell Carcinoma Cells

0 views | Aug 30 2017

Zhang W et al. suggested that survivin could be further developed as a potential therapeutic agent for the treatment of survivin-rich expressed OSCC. [Read the Full Post]

Inhibition of PRMT5 suppresses osteoclast differentiation and partially protects against ovariectomy-induced bone loss through downregulation of CXCL10 and RSAD2

576 views | Aug 29 2017

Dong Y et al. found that PRMT5 is an activator of osteoclast differentiation and inhibition of PRMT5 partially suppressed osteoclastogenesis through downregulation of CXCL10 and RSAD2. [Read the Full Post]

Rhein Inhibits AlkB Repair Enzymes and Sensitizes Cells to Methylated DNA Damage

860 views | Aug 28 2017

Li Q et al. revealed that rhein binds to AlkB repair enzymes in vitro and promotes thermal stability in vivo In addition, we have determined a new structural complex of rhein bound to AlkB, which shows that rhein binds to a different part of the active site in AlkB than it binds to in fat mass and obesity-associated protein (FTO). [Read the Full Post]

Leptin-STAT3-G9a Signaling Promotes Obesity-Mediated Breast Cancer Progression

705 views | Aug 28 2017

Chang CC et al. showed how targeting STAT3-G9a signaling regulates CSC plasticity during obesity-related breast cancer progression, suggesting a novel therapeutic paradigm to suppress CSC pools and limit breast malignancy. [Read the Full Post]

Identification of cytotoxic agents disrupting synovial sarcoma oncoprotein interactions by proximity ligation assay

1385 views | Aug 27 2017

Laporte AN et al. report use of the proximity ligation assay to confirm the oncogenic association of SS18-SSX with its co-factor TLE1 in multiple human synovial sarcoma cell lines and in surgically-excised human tumor tissue. SS18-SSX/TLE1 interactions are disrupted by class I HDAC inhibitors and novel small molecule inhibitors. This assay can be applied in a high-throughput format for drug discovery in fusion-oncoprotein associated cancers where key effector partners are known. [Read the Full Post]

Liraglutide attenuates the osteoblastic differentiation of MC3T3‑E1 cells by modulating AMPK/mTOR signaling

2275 views | Aug 27 2017

Hu XK et al. study demonstrate that liraglutide attenuates osteoblastic differentiation of MC3T3‑E1 cells via modulation of AMPK/mTOR signaling. The present study revealed a novel function of liraglutide, which contributes to the understanding of its pharmacological and physiological effects in clinical settings. [Read the Full Post]

miR-18a promotes cell proliferation of esophageal squamous cell carcinoma cells by increasing cylin D1 via regulating PTEN-PI3K-AKT-mTOR signaling axis

0 views | Aug 25 2017

Zhang W et al. demonstrated the upregulation of miR-18a promoted cell proliferation by increasing cylin D1 via regulating PTEN-PI3K-AKT-mTOR signaling axis, suggesting that small molecule inhibitors of AKT-mTOR signaling are potential agents for the treatment of ESCC patients with upregulation of miR-17-92 cluster. [Read the Full Post]

Visfatin attenuates the ox-LDL-induced senescence of endothelial progenitor cells by upregulating SIRT1 expression through the PI3K/Akt/ERK pathway

0 views | Aug 25 2017

Ming GF et al. suggested that the treatment of EPCs with visfatin markedly attenuates the ox-LDL-induced senescence of EPCs by upregulating SIRT1 expression through the PI3K/Akt/ERK pathway. [Read the Full Post]

Brain-Penetrating Histone Deacetylase Inhibitor RG2833 Reduces the Viability of Human Malignant Melanoma Cell Lines SK-MEL-5 and SK-MEL-28 in vitro

1363 views | Aug 24 2017

Lauren Green found that concentrations of RG2833 that effectively inhibited HDAC activity also resulted in reduced melanoma cell growth and viability. These results demonstrate the effectiveness of RG2833 in reducing the growth and viability of malignant melanoma cells in vitro and warrant further investigation of the potential therapeutic use of RG2833 and related compounds in the battle against cancer. [Read the Full Post]

Differential compensation mechanisms define resistance to PI3K inhibitors in PIK3CA amplified HNSCC

634 views | Aug 24 2017

Michmerhuizen NL et al. suggestED that inhibition of the PI3K and Ras-MEK-ERK pathways might be effective in some HNSCC patients; however, it also prompts the study of additional resistance mechanisms to identify synergistic combination therapies for tumors resistant to these di-therapies. [Read the Full Post]

Sodium phenylbutyrate antagonizes prostate cancer through the induction of apoptosis and attenuation of cell viability and migration

1461 views | Aug 23 2017

Xu Y et al. found that the viability of PCa cells was significantly inhibited by SPB treatment. As illustrated by flow cytometry, for DU145 cell line the average apoptotic rate of SPB-treated cells was significantly lower than that of the control group (P<0.05); similar results were also seen for PC3 (P<0.05). SPB administration also attenuated the colony formation and migration abilities in both cell lines. The expression level of survivin in SPB-treated cells was significantly downregulated, while the phosphorylation of p-38 and ERK was enhanced. Furthermore, in vivo tumor formation of both cell lines was suppressed by SPB as well. [Read the Full Post]

Acetylation of p53 Protein at Lysine 120 Up-regulates Apaf-1 Protein and Sensitizes the Mitochondrial Apoptotic Pathway

1588 views | Aug 23 2017

Yun T et al. found that histone deacetylase (HDAC) inhibitors, including butyrate, augment Lys-120 acetylation of p53 and thus Apaf-1 expression by inhibiting HDAC1. In p53-null cells, transfection of wild-type but not K120R mutant p53 can restore the p53-dependent sensitivity to butyrate. Strikingly, transfection of acetylation-mimicking K120Q mutant p53 is sufficient to up-regulates Apaf-1 in a manner independent of butyrate treatment. Therefore, HDAC inhibitors can induce p53 acetylation at lysine 120, which in turn enhances mitochondrion-mediated apoptosis through transcriptional up-regulation of Apaf-1. [Read the Full Post]

Targeted knockdown of polo-like kinase 1 alters metabolic regulation in melanoma

794 views | Aug 22 2017

Gutteridge RE et al. suggested that PLK1 may be an important regulator of metabolism maintenance in melanoma cells. [Read the Full Post]