scholarly journals Inhibiting endoplasmic reticulum stress decreases tumor burden in a mouse model for hepatocellular carcinoma

2019 ◽  
Author(s):  
Natasa Pavlovic ◽  
Carlemi Calitz ◽  
Kessarin Thanapirom ◽  
Giuseppe Mazza ◽  
Krista Rombouts ◽  
...  
Keyword(s):  
Er Stress ◽  
Stellate Cells ◽  
Tumor Burden ◽  
Tumor Cell Proliferation ◽  
Cell Proliferation And Migration ◽  
Important Mediator ◽  
And Migration ◽  
Stress Pathway ◽  
Hcc Cells ◽  
Proliferation And Migration

ABSTRACTHepatocellular carcinoma (HCC) is a liver tumor that arises in patients with cirrhosis. Hepatic stellate cells are key players in the progression of HCC, as they create a fibrotic micro-environment and produce growth factors and cytokines that enhance tumor cell proliferation and migration. We assessed the role of endoplasmic reticulum (ER) stress in the cross-talk between stellate cells and HCC-cells. Mice with a fibrotic HCC were treated with the IRE1α-inhibitor 4μ8C, which reduced tumor burden and collagen deposition. By co-culturing HCC-cells with stellate cells, we found that HCC-cells induce ER-stress in stellate cells, thereby contributing to their activation. Inhibiting IRE1α blocked stellate cell activation, which inhibited tumor cell proliferation and migration in different in vitro 2D and 3D co-cultures. Our results suggest that IRE1α is an important mediator in the communication between stellate cells and cancer cells and components of the ER-stress pathway may be therapeutically relevant for HCC-patients.Impact statementIRE1α is an important mediator in the communication between stellate cells and cancer cells and components of the ER-stress pathway may be therapeutically relevant for liver cancer.

scholarly journals Inhibiting IRE1α-endonuclease activity decreases tumor burden in a mouse model for hepatocellular carcinoma

eLife ◽  
2020 ◽  
Vol 9 ◽  
Author(s):  
Nataša Pavlović ◽  
Carlemi Calitz ◽  
Kess Thanapirom ◽  
Guiseppe Mazza ◽  
Krista Rombouts ◽  
...  
Keyword(s):  
Hepatocellular Carcinoma ◽  
Tumor Cells ◽  
Cell Activation ◽  
Stellate Cell ◽  
Stellate Cells ◽  
Tumor Burden ◽  
And Migration ◽  
Hcc Cells ◽  
Proliferation And Migration

Hepatocellular carcinoma (HCC) is a liver tumor that usually arises in patients with cirrhosis. Hepatic stellate cells are key players in the progression of HCC, as they create a fibrotic micro-environment and produce growth factors and cytokines that enhance tumor cell proliferation and migration. We assessed the role of endoplasmic reticulum (ER) stress in the cross-talk between stellate cells and HCC cells. Mice with a fibrotic HCC were treated with the IRE1α-inhibitor 4μ8C, which reduced tumor burden and collagen deposition. By co-culturing HCC-cells with stellate cells, we found that HCC-cells activate IREα in stellate cells, thereby contributing to their activation. Inhibiting IRE1α blocked stellate cell activation, which then decreased proliferation and migration of tumor cells in different in vitro 2D and 3D co-cultures. In addition, we also observed cell-line-specific direct effects of inhibiting IRE1α in tumor cells.

Chaperone-mediated Autophagy Governs Progression of Papillary Thyroid Carcinoma via PPARγ-SDF1/CXCR4 Signaling

2020 ◽  
Vol 105 (10) ◽  
pp. 3308-3323
Author(s):  
Hong Zhou ◽  
Xin Xie ◽  
Ying Chen ◽  
Yi Lin ◽  
Zhaogen Cai ◽  
...  
Keyword(s):  
Cell Proliferation ◽  
Papillary Thyroid Carcinoma ◽  
Tumor Cell Proliferation ◽  
Papillary Thyroid ◽  
Cxcr4 Signaling ◽  
Cell Proliferation And Migration ◽  
Underlying Mechanisms ◽  
And Migration ◽  
Chaperone Mediated Autophagy ◽  
Proliferation And Migration

Abstract Context Papillary thyroid carcinoma (PTC) is the most common endocrine malignancy. Chaperone-mediated autophagy (CMA), 1 type of autophagy, is thought to promote or suppress cancer development in different cancer types. However, the effect of CMA on PTC development and the underlying mechanisms remain unknown. Objective To determine whether CMA plays implied critical roles in the development of PTC. Design We investigated the association between CMA and PTC development in PTC tissues and normal thyroid tissues by detecting the key protein of CMA, lysosome-associated membrane protein type 2A (LAMP2A), using quantitative polymerase chain reaction (PCR) and immunohistochemistry, which were further validated in the TGCA dataset. The effect of CMA on PTC development was studied by cell proliferation, migration, and apoptosis assays. The underlying mechanisms of peroxisome proliferator-activated receptor γ (PPARγ)-stromal cell-derived factor 1 (SDF1)/ C-X-C motif chemokine receptor 4 (CXCR4) signaling were clarified by western blotting, quantitative PCR, and rescue experiments. Knockdown and tamoxifen were used to analyze the effect of estrogen receptor (ER) α on CMA. Results Our study confirmed that CMA, indicated by LAMP2A expression, was significantly increased in PTC tumor tissues and cell lines, and was associated with tumor size and lymph node metastasis of patients. Higher CMA in PTC promoted tumor cell proliferation and migration, thereby promoting tumor growth and metastasis. These effects of CMA on PTC were exerted by decreasing PPARγ protein expression to enhance SDF1 and CXCR4 expression. Furthermore, CMA was found positively regulated by ERα signaling in PTC. Conclusion Our investigation identified CMA regulated by ERα promoting PTC tumor progression that enhanced tumor cell proliferation and migration by targeting PPARγ-SDF1/CXCR4 signaling, representing a potential target for treatment of PTC.

scholarly journals Metformin Suppressed CXCL8 Expression and Cell Migration in HEK293/TLR4 Cell Line

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Zhihui Xiao ◽  
Wenjun Wu ◽  
Vladimir Poltoratsky
Keyword(s):  
Cell Proliferation ◽  
Cell Migration ◽  
Tumor Cell ◽  
Nuclear Translocation ◽  
High Dose ◽  
Dependent Manner ◽  
Tumor Cell Proliferation ◽  
Cell Proliferation And Migration ◽  
And Migration ◽  
Proliferation And Migration

Chronic inflammation is associated with cancer. CXCL8 promotes tumor microenvironment construction through recruiting leukocytes and endothelial progenitor cells that are involved in angiogenesis. It also enhances tumor cell proliferation and migration. Metformin, type II diabetes medication, demonstrates anticancer properties via suppressing inflammation, tumor cell proliferation, angiogenesis, and metastasis. This study intended to address the role of metformin in regulation of CXCL8 expression and cell proliferation and migration. Our data indicated that metformin suppressed LPS-induced CXCL8 expression in a dose-dependent manner through inhibiting NF-κB, but not AP-1 and C/EBP, activities under the conditions we used. This inhibitory effect of metformin is achieved through dampening LPS-induced NF-κB nuclear translocation. Cell migration was inhibited by metformin under high dose (10 mM), but not cell proliferation.

scholarly journals MicroRNA-181a-5p Impedes IL-17-Induced Nonsmall Cell Lung Cancer Proliferation and Migration through Targeting VCAM-1

2017 ◽  
Vol 42 (1) ◽  
pp. 346-356 ◽  
Author(s):  
Yang Cao ◽  
Dan Zhao ◽  
Ping Li ◽  
Lanrong Wang ◽  
Bingli Qiao ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Cell Proliferation ◽  
Tumor Cell ◽  
Cell Lung Cancer ◽  
Nonsmall Cell Lung Cancer ◽  
Interleukin 17 ◽  
Tumor Cell Proliferation ◽  
Cell Proliferation And Migration ◽  
And Migration ◽  
Proliferation And Migration

Aim: The contribution of the inflammatory mediator interleukin-17 (IL-17) in nonsmall cell lung cancer (NSCLC) malignancy has been reported in the literature. MicroRNA-181a-5p (miR-181a-5p) acts as a tumor suppressor which can regulate target gene at the posttranscriptional level. Our study aimed to investigate the interaction between IL-17 and miR-181a-5p in NSCLC. Methods: 35 patients with NSCLC and 24 COPD controls were selected and examined in our study. In vitro, H226 and H460 cell lines were exposed to different doses (20, 40, 60, and 80 ng/mL) of IL-17 to examine the effect of IL-17 on miR-181a-5p and vascular cell adhesion molecule 1 (VCAM-1) expression. MiR-181 mimic and miR-181a-5p inhibitor were transfected to explore the regulation of VCAM-1 as well as tumor cell proliferation and migration. Results: miR-181a-5p expression was downregulated, and IL-17 and VCAM-1 expression was upregulated in NSCLC tissues. Furthermore, IL-17 decreased miR-181a-5p expression but increased VCAM-1 expression in H226 and H460 cells. MiR-181 regulated VCAM-1 expression through binding to 3’-UTR sequence. MiR-181 attenuated tumor cell proliferation and migration. IL-17 modulated miR-181a-5p expression through activating NF-κB but not Stat3. Conclusion: Taken together, our data show the regulation of VCAM-1 expression by miR-181a-5p under IL-17 exposure, predicting a potential way for counteracting cancer metastasis.

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