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Li J, Tan M, Yang T, Huang Q, Shan F. The paracrine isthmin1 transcriptionally regulated by C/EBPβ exacerbates pulmonary vascular leakage in murine sepsis. Am J Physiol Cell Physiol 2024; 326:C304-C316. [PMID: 38047305 DOI: 10.1152/ajpcell.00431.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 11/22/2023] [Accepted: 11/22/2023] [Indexed: 12/05/2023]
Abstract
It is known that pulmonary vascular leakage, a key pathological feature of sepsis-induced lung injury, is largely regulated by perivascular cells. However, the underlying mechanisms have not been fully uncovered. In the present study, we aimed to evaluate the role of isthmin1, a secretory protein originating from alveolar epithelium, in the pulmonary vascular leakage during sepsis and to investigate the regulatory mechanisms of isthmin1 gene transcription. We observed an elevated isthmin1 gene expression in the pulmonary tissue of septic mice induced by cecal ligation and puncture (CLP), as well as in primary murine alveolar type II epithelial cells (ATII) exposed to lipopolysaccharide (LPS). Furthermore, we confirmed that isthmin1 derived from ATII contributes to pulmonary vascular leakage during sepsis. Specifically, adenovirus-mediated isthmin1 disruption in ATII led to a significant attenuation of the increased pulmonary microvascular endothelial cell (PMVEC) hyperpermeability in a PMVEC/ATII coculture system when exposed to LPS. In addition, adeno-associated virus 9 (AAV9)-mediated knockdown of isthmin1 in the alveolar epithelium of septic mice significantly attenuated pulmonary vascular leakage. Finally, mechanistic studies unveiled that nuclear transcription factor CCAAT/enhancer binding protein (C/EBP)β participates in isthmin1 gene activation by binding directly to the cis-regulatory element of isthmin1 locus and may contribute to isthmin1 upregulation during sepsis. Collectively, the present study highlighted the impact of the paracrine protein isthmin1, derived from ATII, on the exacerbation of pulmonary vascular permeability in sepsis and revealed a new regulatory mechanism for isthmin1 gene transcription.NEW & NOTEWORTHY This article addresses the role of the alveolar epithelial-secreted protein isthmin1 on the exacerbation of pulmonary vascular permeability in sepsis and identified nuclear factor CCAAT/enhancer binding protein (C/EBP)β as a new regulator of isthmin1 gene transcription. Targeting the C/EBPβ-isthmin1 regulatory axis on the alveolar side would be of great value in the treatment of pulmonary vascular leakage and lung injury induced by sepsis.
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Affiliation(s)
- Junxia Li
- State Key Laboratory of Trauma, Burns and Combined Injury, Shock and Transfusion Department, Daping Hospital, Army Medical University, Chongqing, People's Republic of China
| | - Miaomiao Tan
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Army Occupational Disease, Daping Hospital, Army Medical University, Chongqing, People's Republic of China
| | - Tian Yang
- Department of Frigid Zone Medicine, College of High Altitude Military Medicine, Army Medical University, Chongqing, People's Republic of China
| | - Qingyuan Huang
- Department of Frigid Zone Medicine, College of High Altitude Military Medicine, Army Medical University, Chongqing, People's Republic of China
| | - Fabo Shan
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Army Occupational Disease, Daping Hospital, Army Medical University, Chongqing, People's Republic of China
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2
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Fu XF, Zhao HC, Yang CL, Chen CZ, Wang K, Gao F, Tian YZ, Zhao HL. MicroRNA-203-3p inhibits the proliferation, invasion and migration of pancreatic cancer cells by downregulating fibroblast growth factor 2. Oncol Lett 2021; 22:626. [PMID: 34267818 PMCID: PMC8258624 DOI: 10.3892/ol.2021.12887] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 04/23/2021] [Indexed: 12/12/2022] Open
Abstract
Aberrant expression of fibroblast growth factor 2 (FGF2) is a major cause of poor prognosis in patients with pancreatic cancer. MicroRNA (miRNA/miR) miR-203-3p is a newly identified miRNA that can affect the biological behavior of tumors. The present study investigated the function of miR-203-3p on the regulation of FGF2 expression, and its role in pancreatic cancer cell proliferation, apoptosis, invasion and migration. Reverse transcription-quantitative PCR was used to determine the mRNA expression levels of miR-203-3p and FGF2 in vitro. Cell Counting Kit-8, Annexin V-APC/7-AAD double-staining Apoptosis Detection kit, wound healing and Transwell assays were used to determine the proliferation, apoptosis, migration and invasion of pancreatic cancer cells. The binding of miR-203-3p to FGF2 was assessed by a luciferase reporter assay. The results demonstrated that miR-203-3p expression was downregulated in pancreatic cancer cells. Gain- and loss-of-function experiments indicated that miR-203-3p inhibited the proliferation, migration and invasion, and promoted the apoptosis of pancreatic cancer cells in vitro. In addition, it was found that alteration of miR-203-3p abolished the promoting effects of FGF2 on pancreatic cancer cells. The present study demonstrated that FGF2 significantly promoted the proliferation, invasion and migration of pancreatic cancer cells. The mechanism involved the binding of miR-203-3p to the 3′-untranslated region of FGF2 mRNA, resulting in the downregulation of FGF2. In conclusion, miR-203-3p inhibited FGF2 expression, regulated the proliferation and inhibited the invasion and migration of pancreatic cancer cells.
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Affiliation(s)
- Xi-Feng Fu
- Department of Biliary and Pancreatic Surgery, Shanxi Bethune Hospital, Shanxi Medical University, Taiyuan, Shanxi 030032, P.R. China.,Third Clinical College, Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China
| | - Hai-Chao Zhao
- Department of Biliary and Pancreatic Surgery, Shanxi Bethune Hospital, Shanxi Medical University, Taiyuan, Shanxi 030032, P.R. China.,Third Clinical College, Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China
| | - Chuan-Li Yang
- Department of Biliary and Pancreatic Surgery, Shanxi Bethune Hospital, Shanxi Medical University, Taiyuan, Shanxi 030032, P.R. China
| | - Chang-Zhou Chen
- Third Clinical College, Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China
| | - Kang Wang
- Third Clinical College, Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China
| | - Fei Gao
- Department of Biliary and Pancreatic Surgery, Shanxi Bethune Hospital, Shanxi Medical University, Taiyuan, Shanxi 030032, P.R. China
| | - Yang-Zhang Tian
- Department of Biliary and Pancreatic Surgery, Shanxi Bethune Hospital, Shanxi Medical University, Taiyuan, Shanxi 030032, P.R. China
| | - Hao-Liang Zhao
- Department of Biliary and Pancreatic Surgery, Shanxi Bethune Hospital, Shanxi Medical University, Taiyuan, Shanxi 030032, P.R. China.,Third Clinical College, Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China
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3
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Li G, Qi HW, Dong HG, Bai P, Sun M, Liu HY. Targeting deubiquitinating enzyme USP26 by microRNA-203 regulates Snail1's pro-metastatic functions in esophageal cancer. Cancer Cell Int 2020; 20:355. [PMID: 32760222 PMCID: PMC7393868 DOI: 10.1186/s12935-020-01441-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 07/15/2020] [Accepted: 07/20/2020] [Indexed: 12/15/2022] Open
Abstract
Background Esophageal cancer is one of the most common cancers worldwide with poor prognosis and high mortality. The transcription factor SNAI1, encoding Snail1, is important for metastatic progression in esophageal cancer whereas the microRNA (miRNA)-203 has been shown to function as an inhibitor of metastasis in EC. The Snail1 protein is stabilized in EC partially by the deubiquitinating enzyme USP26; however, how USP26 is regulated is not completely known. Methods Expression of SNAI1 and USP26 messenger RNA (mRNA) and miR-203 was performed in datasets within The Cancer Genome Atlas and Gene Expression Omnibus, respectively. Expression of Snail1 and USP26 protein and miR-203 was determined in the normal esophageal cell line HET-1A and EC cell lines Kyse150 and TE-1 using western blot and quantitative polymerase chain reaction, respectively. TargetScan was used for in situ prediction of miR-203 targets and in vitro heterologous reporter assays using the wild-type and miR-203 seed mutant of the 3′ Untranslated region (UTR) of USP26 were used to investigate whether USP26 is a target of miR-203. Effects of increasing miR-203 using MIR203A/5P mimic on USP26 and Snail1 in the HET-1A, Kyse150 and TE-1 cell lines were performed using western blot and cycloheximide-based protein stability analysis. Effects of modulating miR-203 in Kyse150 and TE-1 cell lines on in vitro pro-metastatic effects were analyzed by invasion assay, scratch wound-healing assay, and chemosensitivity to 5-fluoruracil (5-FU). In vivo lung metastasis assay was used to study the effect of modulating miR-203 in Kyse150 cells. Results SNAI1 mRNA and HSA/MIR203 was higher and lower, respectively, in EC patients compared to tumor-adjacent normal tissues. No changes in expression of USP26 mRNA were observed in these datasets. MIR/203 expression was downregulated whereas protein expression of both Snail1 and USP26 were higher in EC cell lines Kyse150 and TE-1 compared to normal esophageal cell line HET-1A. USP26 was predicted as a potential target of miR-203 by TargetScan Release 2.0. Reporter assays confirmed USP26 as a target of miR-203 in the EC cell lines. Transfection of EC cell lines with MIR203 mimic decreased USP26 protein expression and Snail1 protein stability indicating the ability of miR-203 to regulate Snail1 protein levels via USP26. Exogenous increase in miR-203 in the EC cell lines significantly inhibited Snail-1 mediated in vitro pro-metastatic function of invasion, wound-healing, and increased chemosensitivity to 5-FU. Finally, overexpression of miR-203 inhibited in vivo lung metastasis of Kyse150 cells, which was reversed following overexpression of USP26, indicating a direct role of miR-203-mediated regulation of USP26 in metastatic progression of EC. Conclusions Cumulatively, these results establish an important mechanism by which decrease in miR-203 expression potentiates metastatic progression in EC via USP26-mediated stabilization of Snail1. Hence, miR-203 can serve as a biomarker of metastasis in EC and is a potential target for therapeutic intervention in EC.
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Affiliation(s)
- Gang Li
- Department of Surgical Oncology, Taian City Central Hospital, Taian, 271000 Shandong China
| | - Hong-Wei Qi
- Department of Medicine, Taian City Central Hospital, Taian, 271000 Shandong China
| | - He-Gui Dong
- Department of Outpatient, Taian City Central Hospital, Taian, 271000 Shandong China
| | - Ping Bai
- Department of Surgical Oncology, Taian City Central Hospital, Taian, 271000 Shandong China
| | - Ming Sun
- Department of Surgical Oncology, Taian City Central Hospital, Taian, 271000 Shandong China
| | - Hai-Yan Liu
- Department of Oncology, The Second Affiliate Hospital of Shandong First Medical University, No.706, Taishan Street, Taian, 271000 Shandong China
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Xu M, Zhang Y. Morin Inhibits Ovarian Cancer Growth through the Inhibition of NF-κB Signaling Pathway. Anticancer Agents Med Chem 2020; 19:2243-2250. [PMID: 31660844 DOI: 10.2174/1871521409666191014164742] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/27/2019] [Accepted: 09/13/2019] [Indexed: 12/18/2022]
Abstract
Background &Objective:
Ovarian cancer has the highest mortality in gynecological tumors without
effective therapeutic drugs as a result of drug-resistance for long-term utilization. Morin has been reported to
possess powerful anti-tumor effects in several cancers. The present study aims to investigate whether Morin
could influence ovarian cancer growth and underlying mechanisms.
Methods:
Morin was administered to cultured cells in vitro and formed tumors in vivo. MTT and colony formation
assays were performed to explore the effects of Morin on the proliferation and colony formation of
OVCAR3 and SKOV3 ovarian cancer cells. Western blot, RT-qPCR, immunofluorescence as well as ELISA
were used to detect protein and mRNA expression of target factors. Tumor formation was performed to investigate
tumorigenesis ability of drug-treated cells.
Results:
The proliferation and colony size of OVCAR3 and SKOV3 were significantly decreased after Morin
administration. The expression of NF-κB and inflammatory cytokine IL6/8 induced by TNF-α can be inhibited
by Morin. Furthermore, Morin inhibited the volume of ovarian cancer tumors in nude mice.
Conclusion:
Morin effectively alleviates ovarian cancer growth, inhibits the inflammatory response, and reduces
tumor size via modulation of the NF-κB pathway.
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Affiliation(s)
- Meimei Xu
- Department of Gynecology and Obstetrics, Liaocheng People's Hospital, No. 67 of Dongchang West Road, Liaocheng 252000, Shandong, China
| | - Yan Zhang
- Department of Gynecology and Obstetrics, Liaocheng People's Hospital, No. 67 of Dongchang West Road, Liaocheng 252000, Shandong, China
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5
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Mahmoudian RA, Bahadori B, Rad A, Abbaszadegan MR, Forghanifard MM. MEIS1 knockdown may promote differentiation of esophageal squamous carcinoma cell line KYSE-30. Mol Genet Genomic Med 2019; 7:e00746. [PMID: 31090196 PMCID: PMC6625128 DOI: 10.1002/mgg3.746] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 04/01/2019] [Accepted: 04/27/2019] [Indexed: 12/11/2022] Open
Abstract
Background MEIS1 (Myeloid ecotropic viral integration site 1), as a homeobox (HOX) transcription factor, has a dual function in different types of cancer. Although numerous roles are proposed for MEIS1 in differentiation, stem cell function, gastrointestinal development and tumorigenesis, the involved molecular mechanisms are poor understood. Our aim in this study was to elucidate the functional correlation between MEIS1, as regulator of differentiation process, and the involved genes in cell differentiation in human esophageal squamous carcinoma (ESC) cell line KYSE‐30. Methods The KYSE‐30 cells were transduced using recombinant retroviral particles containing specific shRNA sequence against MEIS1 to knockdown MEIS1 gene expression. Following RNA extraction and cDNA synthesis, mRNA expression of MEIS1 and the selected genes including TWIST1, EGF, CDX2, and KRT4 was examined using relative comparative real‐time PCR. Results Retroviral transduction caused a significant underexpression of MEIS1 in GFP‐hMEIS1 compared to control GFP cells approximately 5.5‐fold. While knockdown of MEIS1 expression caused a significant decrease in EGF and TWIST1 mRNA expression, nearly ‐8‐ and ‐12‐fold respectively, it caused a significant increase in mRNA expression of differentiation markers including KRT4 and CDX2, approximately 34‐ and 1.14‐fold, correspondingly. Conclusion MEIS1 gene silencing in KYSE‐30 cells increased expression of epithelial markers and decreased expression of epithelial‐mesenchymal transition (EMT) marker TWIST1. It may highlight the role of MEIS1 in differentiation process of KYSE‐30 cells. These results may confirm that MEIS1 silencing promotes differentiation and decreases EMT capability of ESC cell line KYSE‐30.
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Affiliation(s)
| | - Bahareh Bahadori
- Department of Biology, Damghan Branch, Islamic Azad University, Damghan, Iran
| | - Abolfazl Rad
- Cellular and Molecular Research center, Sabzevar Univeristy of Medical Sciences, Sabzevar, Iran
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Zhang N, Zhu T, Yu K, Shi M, Wang X, Wang L, Huang T, Li W, Liu Y, Zhang J. Elevation of O-GlcNAc and GFAT expression by nicotine exposure promotes epithelial-mesenchymal transition and invasion in breast cancer cells. Cell Death Dis 2019; 10:343. [PMID: 31019204 PMCID: PMC6482138 DOI: 10.1038/s41419-019-1577-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Revised: 04/01/2019] [Accepted: 04/01/2019] [Indexed: 01/10/2023]
Abstract
Cigarette smoking has been shown to be a carcinogenic factor in breast cancer. Nicotine (Nic), an active component of tobacco, has been found to induce epithelial-mesenchymal transition (EMT) in breast cancer cells. However, the alterations in protein O-GlcNAcylation in Nic-mediated tumorigenesis and malignization mechanisms are less well studied. Herein, we found that cellular O-GlcNAcylation dramatically increased in human breast cancer cells with EMT activation induced by Nic. Elevated O-GlcNAcylation subsequently promoted Nic-induced EMT activation and increased cell migratory abbility. In addition, we demonstrated that a differentiation factor for the mammary epithelium, CCAAT/enhancer-binding protein B (CEBPB), was involved in Nic-induced hyper-O-GlcNAcylation via transcriptional regulation of the expression of the key enzyme glutamine: fructose-6-phosphate amidotransferase (GFAT) and thus increased the flux through the hexosamine biosynthetic pathway (HBP). Finally, elevated O-GlcNAcylation of the transcriptional repressor C/EBP homologous protein (CHOP) suppressed its heterodimerization with CEBPB and facilitated the DNA-binding activity of CEBPB, further generating positive feedback that enhanced EMT upon Nic stimulation. In conclusion, our results have revealed a new regulatory mechanism involving CEBPB/GFAT-induced hyper-O-GlcNAcylation that plays a key role in EMT and smoking-mediated breast cancer progression.
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Affiliation(s)
- Nana Zhang
- School of Life Science & Medicine, Dalian University of Technology, Panjin, China
| | - Tong Zhu
- School of Life Science & Medicine, Dalian University of Technology, Panjin, China
| | - Kairan Yu
- School of Life Science & Medicine, Dalian University of Technology, Panjin, China
| | - Meiyun Shi
- School of Life Science & Medicine, Dalian University of Technology, Panjin, China
| | - Xue Wang
- School of Life Science & Medicine, Dalian University of Technology, Panjin, China
| | - Lingyan Wang
- School of Life Science & Medicine, Dalian University of Technology, Panjin, China
| | - Tianmiao Huang
- School of Life Science & Medicine, Dalian University of Technology, Panjin, China
| | - Wenli Li
- School of Life Science & Medicine, Dalian University of Technology, Panjin, China.,School of Life Science & Biotechnology, Dalian University of Technology, Dalian, China
| | - Yubo Liu
- School of Life Science & Medicine, Dalian University of Technology, Panjin, China.
| | - Jianing Zhang
- School of Life Science & Medicine, Dalian University of Technology, Panjin, China.
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7
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Li H, Yang F, Chai L, Zhang L, Li S, Xu Z, Kong L. CCAAT/Enhancer Binding Protein β-Mediated MMP3 Upregulation Promotes Esophageal Squamous Cell Cancer Invasion In Vitro and Is Associated with Metastasis in Human Patients. Genet Test Mol Biomarkers 2019; 23:304-309. [PMID: 30969151 DOI: 10.1089/gtmb.2018.0291] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Aims: Metastasis is a significant obstacle to curing esophageal squamous cell carcinoma (ESCC). The CCAAT/enhancer binding protein β (C/EBPβ) and matrix metalloproteinase 3 (MMP3) are thought to play key roles in cancer invasion and metastasis. In this study, we aimed to detect whether C/EBPβ-mediated tumor invasion was dependent on MMP3. In addition, we determined whether C/EBPβ upregulation was associated with MMP3 levels and metastatic status in patients with ESCC. Materials and Methods: A total of 126 patients with ESCC were recruited for this study. The mRNA and protein levels of C/EBPβ and MMP3 in ESCC cell lines and specimens from ESCC patient were determined by reverse transcription-polymerase chain reaction and western blot, respectively. Tumor cell invasion was analyzed using an in vitro Matrigel Invasion Assay. The correlation between C/EBPβ and MMP3 expression was determined by Pearson's correlation analysis. Results: Both mRNA and protein levels of MMP3 were upregulated by C/EBPβ overexpression and downregulated by C/EBPβ siRNA in KYSE150 cell cultures. The promotion of ESCC cell invasion through C/EBPβ was inhibited by MMP3 siRNA. The level of C/EBPβ was correlated with MMP3 and metastatic status in patients with ESCC. Conclusions: C/EBPβ upregulation promoted tumor cell invasion in an MMP3-dependent manner in vitro and was associated with metastatic status in ESCC.
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Affiliation(s)
- Hong Li
- 1 Department of Oncology, Henan Cancer Hospital, Zhengzhou University, Zhengzhou, Henan Province, People's Republic of China
| | - Fan Yang
- 2 Department of Computer Science, University of Nebraska-Lincoln, Lincoln, Nebraska
| | - Li Chai
- 3 Department of Clinical Laboratory, Tongxu County People's Hospital, Tongxu, Henan Province, People's Republic of China
| | - Liguo Zhang
- 4 Department of Thoracic Surgery, Xinxiang City Center Hospital, Xinxiang, Henan Province, People's Republic of China
| | - Sha Li
- 5 Department of Molecular Laboratory, Zhengzhou Haipu Medical Laboratory, Zhengzhou, People's Republic of China
| | - Ziguang Xu
- 6 Department of Pathology, Henan Provincial People's Hospital, Zhengzhou University, Zhengzhou, People's Republic of China
| | - Lingfei Kong
- 6 Department of Pathology, Henan Provincial People's Hospital, Zhengzhou University, Zhengzhou, People's Republic of China
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8
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Adamo H, Hammarsten P, Hägglöf C, Dahl Scherdin T, Egevad L, Stattin P, Halin Bergström S, Bergh A. Prostate cancer induces C/EBPβ expression in surrounding epithelial cells which relates to tumor aggressiveness and patient outcome. Prostate 2019; 79:435-445. [PMID: 30536410 DOI: 10.1002/pros.23749] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 11/08/2018] [Indexed: 02/04/2023]
Abstract
BACKGROUND Implantation of rat prostate cancer cells into the normal rat prostate results in tumor-stimulating adaptations in the tumor-bearing organ. Similar changes are seen in prostate cancer patients and they are related to outcome. One gene previously found to be upregulated in the non-malignant part of tumor-bearing prostate lobe in rats was the transcription factor CCAAT/enhancer-binding protein-β (C/EBPβ). METHODS To explore this further, we examined C/EBPβ expression by quantitative RT-PCR, immunohistochemistry, and Western blot in normal rat prostate tissue surrounding slow-growing non-metastatic Dunning G, rapidly growing poorly metastatic (AT-1), and rapidly growing highly metastatic (MatLyLu) rat prostate tumors-and also by immunohistochemistry in a tissue microarray (TMA) from prostate cancer patients managed by watchful waiting. RESULTS In rats, C/EBPβ mRNA expression was upregulated in the surrounding tumor-bearing prostate lobe. In tumors and in the surrounding non-malignant prostate tissue, C/EBPβ was detected by immunohistochemistry in some epithelial cells and in infiltrating macrophages. The magnitude of glandular epithelial C/EBPβ expression in the tumor-bearing prostates was associated with tumor size, distance to the tumor, and metastatic capacity. In prostate cancer patients, high expression of C/EBPβ in glandular epithelial cells in the surrounding tumor-bearing tissue was associated with accumulation of M1 macrophages (iNOS+) and favorable outcome. High expression of C/EBPβ in tumor epithelial cells was associated with high Gleason score, high tumor cell proliferation, metastases, and poor outcome. CONCLUSIONS This study suggest that the expression of C/EBP-beta, a transcription factor mediating multiple biological effects, is differentially expressed both in the benign parts of the tumor-bearing prostate and in prostate tumors, and that alterations in this may be related to patient outcome.
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Affiliation(s)
- Hanibal Adamo
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden
| | - Peter Hammarsten
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden
| | - Christina Hägglöf
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden
| | - Tove Dahl Scherdin
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden
| | - Lars Egevad
- Department of Oncology-Pathology, Karolinska University Hospital, Stockholm, Sweden
| | - Pär Stattin
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | | | - Anders Bergh
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden
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9
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Identification of the Transcription Factor Relationships Associated with Androgen Deprivation Therapy Response and Metastatic Progression in Prostate Cancer. Cancers (Basel) 2018; 10:cancers10100379. [PMID: 30314329 PMCID: PMC6210624 DOI: 10.3390/cancers10100379] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 09/25/2018] [Accepted: 10/02/2018] [Indexed: 11/17/2022] Open
Abstract
Background: Patients with locally advanced or recurrent prostate cancer typically undergo androgen deprivation therapy (ADT), but the benefits are often short-lived and the responses variable. ADT failure results in castration-resistant prostate cancer (CRPC), which inevitably leads to metastasis. We hypothesized that differences in tumor transcriptional programs may reflect differential responses to ADT and subsequent metastasis. Results: We performed whole transcriptome analysis of 20 patient-matched Pre-ADT biopsies and 20 Post-ADT prostatectomy specimens, and identified two subgroups of patients (high impact and low impact groups) that exhibited distinct transcriptional changes in response to ADT. We found that all patients lost the AR-dependent subtype (PCS2) transcriptional signatures. The high impact group maintained the more aggressive subtype (PCS1) signal, while the low impact group more resembled an AR-suppressed (PCS3) subtype. Computational analyses identified transcription factor coordinated groups (TFCGs) enriched in the high impact group network. Leveraging a large public dataset of over 800 metastatic and primary samples, we identified 33 TFCGs in common between the high impact group and metastatic lesions, including SOX4/FOXA2/GATA4, and a TFCG containing JUN, JUNB, JUND, FOS, FOSB, and FOSL1. The majority of metastatic TFCGs were subsets of larger TFCGs in the high impact group network, suggesting a refinement of critical TFCGs in prostate cancer progression. Conclusions: We have identified TFCGs associated with pronounced initial transcriptional response to ADT, aggressive signatures, and metastasis. Our findings suggest multiple new hypotheses that could lead to novel combination therapies to prevent the development of CRPC following ADT.
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10
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Li S, Zhou Y, Zheng X, Wu X, Liang Y, Wang S, Zhang Y. Sphk1 promotes breast epithelial cell proliferation via NF-κB-p65-mediated cyclin D1 expression. Oncotarget 2018; 7:80579-80585. [PMID: 27811358 PMCID: PMC5348342 DOI: 10.18632/oncotarget.13013] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 10/22/2016] [Indexed: 12/14/2022] Open
Abstract
Lipid metabolism is crucially involved with the promotion of malignant progression and metastasis in various cancers. Growing evidence suggests that many types of cancers express high levels of sphingosine kinase 1 (Sphk1), which is known to mediate cell proliferation We hypothesized that Sphk1/sphingosine-1-phosphate (S1P) signaling contributes to tumor progression. In MCF10A and MCF10A-Sphk1 breast epithelial cells, we used TNF-α to activate the Sphk1/S1P pathway and the measured expression levels of NF-κBp65 and cyclin D1 mRNA and protein in the presence and absence of an NF-κB-p65 inhibitor. Chromatin immunoprecipitation assays were performed to determine whether NF-κB-p65 binds to the cyclin D1 promoter. We found that overexpression of Sphk1 induced NF-κB-p65 activation, increased expression of cyclin D1, shortened the cell division cycle, and thus promoted proliferation of breast epithelial cells. These findings provide insight into the mechanism by which an Sphk1/NF-κB-p65/cyclin D1 signaling pathway mediates cell proliferation.
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Affiliation(s)
- Shifei Li
- Breast Disease Center, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Yan Zhou
- Breast Disease Center, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Xiaodong Zheng
- Breast Disease Center, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Xiujuan Wu
- Breast Disease Center, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Yueyang Liang
- Breast Disease Center, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Shushu Wang
- Breast Disease Center, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Yi Zhang
- Breast Disease Center, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
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11
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Jiang T, Du F, Qin N, Lu Q, Dai J, Shen H, Hu Z. Systematical analyses of variants in DNase I hypersensitive sites to identify hepatocellular carcinoma susceptibility loci in a Chinese population. J Gastroenterol Hepatol 2017; 32:1887-1894. [PMID: 28321907 DOI: 10.1111/jgh.13790] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Revised: 02/20/2017] [Accepted: 03/16/2017] [Indexed: 12/21/2022]
Abstract
BACKGROUND AND AIM Although several variants located at coding and non-coding regions were evaluated by previous studies, the evidence for associations between variants located in DNase I-hypersensitive sites (DHSs) and hepatocellular carcinoma (HCC) risk was still limited. Recent advances using ENCODE data indicated that genetic variants in DHSs played an important role in carcinogenesis. Therefore, systematically investigating the associations between regulatory variants in DHSs and HCC risk should be put on the agenda. METHODS We conducted a case-control design (1538 HCC cases vs 1465 normal controls) to evaluate the effects on HCC for the variants located at the uniform DNase I hypersensitive sites sequencing peaks in a Chinese population. RESULTS We found two novel single nucleotide polymorphisms rs12309362 (odds ratio = 0.64, P = 5.61 × 10-6 ) and rs9970827 (odds ratio = 0.73, P = 7.23 × 10-6 ) significantly associated with decreased risk of HCC. Conditional analysis proved that both of them independently contributed to the susceptibility of HCC. Expression quantitative trait loci analysis found that A allele of rs12309362 was significantly associated with an elevated expression of phosphatase phosphoglycerate mutase 5 in liver tissues. In addition, gene-based analysis indicated that CEBPB (P = 1 × 10-4 ) was associated with the risk of HCC, and the expression of CEBPB was significantly lower in 50 The Cancer Genome Atlas HCC tumor tissues compared with matched normal tissues. CONCLUSIONS Our results indicated that rs12309362 (G > A), rs9970827 (A > G) in DHSs, and elevated expression of CEBPB were associated with a decreased risk of HCC. These results may contribute us to understand the function of regulatory DNA sequences in HCC development.
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Affiliation(s)
- Tao Jiang
- Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Fangzhi Du
- Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Na Qin
- Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Qun Lu
- Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Juncheng Dai
- Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, China.,Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center of Cancer Medicine, Nanjing Medical University, Nanjing, China
| | - Hongbing Shen
- Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, China.,Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center of Cancer Medicine, Nanjing Medical University, Nanjing, China
| | - Zhibin Hu
- Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, China.,Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center of Cancer Medicine, Nanjing Medical University, Nanjing, China
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12
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Abstract
Increasing evidence suggests that the water/glycerol channel aquaporin-3 (AQP3) plays a pivotal role in cancer metastasis. AQP3 knockout mice were resistant to skin tumor formation and overexpression correlated with metastasis and poor prognosis in patients with breast or gastric cancer. In cultured cancer cells, increased AQP3 expression stimulated several intracellular signaling pathways and resulted in increased cell proliferation, migration, and invasion as well as aggravation of epithelial-to-mesenchymal transition. Besides AQP facilitated water transport at the leading edge of migrating cells, AQP3 signaling mechanisms are beginning to be unraveled. Here, we give a thorough review of current knowledge regarding AQP3 expression in cancer and how AQP3 contributes to cancer progression via signaling that modulates cellular mechanisms. This review article will expand our understanding of the known pathophysiological findings regarding AQP3 in cancer.
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13
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Wang P, Ma M, Zhang S. EGF-induced urokinase plasminogen activator receptor promotes epithelial to mesenchymal transition in human gastric cancer cells. Oncol Rep 2017; 38:2325-2334. [PMID: 28849196 DOI: 10.3892/or.2017.5920] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 08/10/2017] [Indexed: 11/05/2022] Open
Abstract
Epidermal growth factor (EGF) signaling has been shown to induce epithelial to mesenchymal transition (EMT) in many types of cancer cells. However, the molecular mechanism of EGF-induced EMT in gastric cancer remains largely unknown. In the present study, we found that human gastric cancer cell lines SGC-7901 and BGC-823 underwent EMT phenotypic changes upon exposure to EGF. The induction of EMT was consistent with aggressive characteristics such as increased cell migration, invasion and clonogenic growth. Additionally, EGF stimulation also led to the upregulation of urokinase plasminogen activator receptor (uPAR) both at mRNA and protein levels. Knockdown of uPAR by siRNA significantly attenuated EMT induction by EGF in SGC-7901 and BGC-823 cells. Furthermore, EGF increased ERK1/2 activity and blocking ERK1/2 signaling with its inhibitor, U0126, markedly inhibited EGF-induced uPAR expression and consequently EMT. Collectively, the present study demonstrated that EGF induced aggressiveness of gastric cancer cells by activating EMT, which involved the activation of the ERK1/2 pathway and, subsequently, uPAR expression.
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Affiliation(s)
- Pingping Wang
- Department of Clinical Laboratory, Taizhou Second People's Hospital, Taizhou, Jiangsu 225599, P.R. China
| | - Maoyuan Ma
- Department of Gastroenterology, Taizhou Second People's Hospital, Taizhou, Jiangsu 225599, P.R. China
| | - Shanhui Zhang
- Department of Clinical Laboratory, Taizhou Second People's Hospital, Taizhou, Jiangsu 225599, P.R. China
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14
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Li S, Hang L, Ma Y, Wu C. Distinctive microRNA expression in early stage nasopharyngeal carcinoma patients. J Cell Mol Med 2016; 20:2259-2268. [PMID: 27489139 PMCID: PMC5134390 DOI: 10.1111/jcmm.12906] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 05/15/2016] [Indexed: 12/14/2022] Open
Abstract
The goal of this study was to investigate microRNAs (miRs) expression at different stages of nasopharyngeal carcinoma (NPC). MiR expression profiling at various stages of NPC was performed by miR array and further verified using quantitative real-time RT-PCR. Pathway enrichment analysis was carried out to identify the functional pathways regulated by the miRs. The expression of a selected group of identified miRs was verified in stage I NPC by in situ hybridization (ISH). A total of 449 miRs were identified with significantly different expressions between NPC tissues and normal pharyngeal tissues. Eighty-four miRs were dysregulated only in stage I NPC, among which 45 miRs were up-regulated and the other 39 were down-regulated. Pathway enrichment assay revleaed that three significantly down-regulated and three significantly up-regulated miRs involved in 12 pathways associating with tumour formation and progression. Quantitative RT-PCR confirmed the miR array result. In addition, the low expression levels of hsa-miR-4324, hsa-miR-203a and hsa-miR-199b-5p were further validated in stage I NPC by ISH. This present study identifed the miR signature in stage I NPC, providing the basis for early detection and treatment of NPC.
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Affiliation(s)
- Shuna Li
- Department of Otolaryngology and Head-Neck Surgery, Zhenjiang First People's Hospital, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu, China
| | - Lihua Hang
- Department of Anesthesia, Zhenjiang First People's Hospital, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu, China
| | - Yongming Ma
- Department of Otolaryngology and Head-Neck Surgery, Zhenjiang First People's Hospital, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu, China
| | - Chaoyang Wu
- Department of Radiation Oncology, Zhenjiang First People's Hospital, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu, China
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15
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Fang T, Cui M, Sun J, Ge C, Zhao F, Zhang L, Tian H, Zhang L, Chen T, Jiang G, Xie H, Cui Y, Yao M, Li H, Li J. Orosomucoid 2 inhibits tumor metastasis and is upregulated by CCAAT/enhancer binding protein β in hepatocellular carcinomas. Oncotarget 2016; 6:16106-19. [PMID: 25965830 PMCID: PMC4599259 DOI: 10.18632/oncotarget.3867] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 03/31/2015] [Indexed: 12/19/2022] Open
Abstract
Cancer metastasis is a complex process, and the incidence of metastasis is influenced by many biological factors. Orosomucoid 2 (ORM2) is an important glycoprotein that is mainly biosynthesized and secreted by hepatocytes. As an acute-phase protein, ORM2 likely plays important roles in anti-inflammation, immunomodulation and drug delivery. However, little is known regarding the function of ORM2 in hepatocellular carcinoma (HCC). In this study, we determined that ORM2 expression in HCC tissues was negatively associated with intrahepatic metastasis and histological grade. Moreover, the ectopic overexpression of ORM2 decreased HCC cell migration and invasion in vitro and intrahepatic metastasis in vivo, whereas silencing ORM2 expression resulted in increased tumor cell migration and invasion in vitro. The CCAAT/enhancer binding protein β (C/EBPβ) upregulated ORM2 expression, while only the LAP1/2 (C/EBPβ isoforms) possessed transcription-promoting activity on the ORM2 promoter. Subsequently, we found that LAP1 repressed HCC cell migration and invasion via the induction of ORM2 expression. Consistently, the protein expression of C/EBPβ was negatively associated with histological grade and positively correlated with ORM2 protein expression in HCC tissues. Collectively, our findings indicate that ORM2 is a functional downstream target of C/EBPβ and functions as a tumor suppressor in HCC.
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Affiliation(s)
- Tao Fang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Meiling Cui
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Ji Sun
- Shanghai Medical Colloge, Fudan University, Shanghai, China
| | - Chao Ge
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Fangyu Zhao
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Lin Zhang
- Shanghai Medical Colloge, Fudan University, Shanghai, China
| | - Hua Tian
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Lixing Zhang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Taoyang Chen
- Qi Dong Liver Cancer Institute, Qi Dong, Jiangsu Province, China
| | - Guoping Jiang
- Department of General Surgery, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Haiyang Xie
- Department of General Surgery, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Ying Cui
- Cancer Institute of Guangxi, Nanning, China
| | - Ming Yao
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Hong Li
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jinjun Li
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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16
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Wu SM, Lin WY, Shen CC, Pan HC, Keh-Bin W, Chen YC, Jan YJ, Lai DW, Tang SC, Tien HR, Chiu CS, Tsai TC, Lai YL, Sheu ML. Melatonin set out to ER stress signaling thwarts epithelial mesenchymal transition and peritoneal dissemination via calpain-mediated C/EBPβ and NFκB cleavage. J Pineal Res 2016; 60:142-54. [PMID: 26514342 DOI: 10.1111/jpi.12295] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 10/26/2015] [Indexed: 12/11/2022]
Abstract
Peritoneal dissemination of tumor has high mortality and is associated with the loss of epithelial features, acquisition of motile mesenchymal morphology characteristics, and invasive properties by tumor cells. Melatonin is an endogenously produced molecule in all plant species that is known to exert antitumor activity, but to date, its underlying mechanisms and antiperitoneal metastasis efficacy is not well defined. This study determined the antiperitoneal dissemination potential of melatonin in vivo and assessed its association with the inhibition of epithelial-to-mesenchymal transition (EMT) signaling mechanism by endoplasmic reticulum (ER) stress, which may be a major molecular mechanism of melatonin against cancer. The results demonstrate that melatonin inhibited peritoneal metastasis in vivo and activated ER stress in Cignal ERSE Reporter Assay, organelle structure in transmission electron microscopy images, calpain activity, and protein biomarkers like p-elf2α. Moreover, the overexpression of transcription factor C/EBPβ in gastric cancer interacted with NFκB and further regulates COX-2 expression. These were dissociated and downregulated by melatonin, as proven by immunofluorescence imaging, immunoprecipitation, EMSA, and ChIP assay. Melatonin or gene silencing of C/EBPβ decreased the EMT protein markers (E-cadherin, Snail, and Slug) and Wnt/beta-catenin activity by Topflash activity, and increased ER stress markers. In an animal study, the results of melatonin therapy were consistent with those of in vitro findings and attenuated systemic proangiogenesis factor production. In conclusion, C/EBPβ and NFκB inhibition by melatonin may impede both gastric tumor growth and peritoneal dissemination by inducing ER stress and inhibiting EMT.
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Affiliation(s)
- Sheng-Mao Wu
- Institute of Biomedical Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Wan-Yu Lin
- Department of Nuclear Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Chin-Chang Shen
- Institute of Nuclear Energy Research, Atomic Energy Council, Taoyuan, Taiwan
| | - Hung-Chuan Pan
- Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
- Department of Neurosurgery, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Wang Keh-Bin
- Department of Nuclear Medicine, Kuang Tien General Hospital, Taichung, Taiwan
| | - Yi-Ching Chen
- Department of Nuclear Medicine, Kuang Tien General Hospital, Taichung, Taiwan
| | - Yee-Jee Jan
- Department of Pathology and Laboratory Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
| | - De-Wei Lai
- Institute of Biomedical Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Shu-Ching Tang
- Institute of Biomedical Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Hsing-Ru Tien
- Institute of Biomedical Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Chien-Shan Chiu
- Institute of Biomedical Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Tsung-Chih Tsai
- Department of life Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Yi-Liang Lai
- Division of Gastroenterology, Department of Internal Medicine, Armed Forces Taichung General Hospital, Taiping, Taichung, Taiwan
| | - Meei-Ling Sheu
- Institute of Biomedical Sciences, National Chung Hsing University, Taichung, Taiwan
- Department of Medical Research, Taichung Veterans General Hospital, Taichung, Taiwan
- Rong Hsing Research Center for Translational Medicine, National Chung Hsing University, Taichung, Taiwan
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17
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Csak T, Bala S, Lippai D, Kodys K, Catalano D, Iracheta-Vellve A, Szabo G. MicroRNA-155 Deficiency Attenuates Liver Steatosis and Fibrosis without Reducing Inflammation in a Mouse Model of Steatohepatitis. PLoS One 2015; 10:e0129251. [PMID: 26042593 PMCID: PMC4456142 DOI: 10.1371/journal.pone.0129251] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 05/06/2015] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND & AIM MicroRNAs (miRs) regulate hepatic steatosis, inflammation and fibrosis. Fibrosis is the consequence of chronic tissue damage and inflammation. We hypothesized that deficiency of miR-155, a master regulator of inflammation, attenuates steatohepatitis and fibrosis. METHODS Wild type (WT) and miR-155-deficient (KO) mice were fed methionine-choline-deficient (MCD) or -supplemented (MCS) control diet for 5 weeks. Liver injury, inflammation, steatosis and fibrosis were assessed. RESULTS MCD diet resulted in steatohepatitis and increased miR-155 expression in total liver, hepatocytes and Kupffer cells. Steatosis and expression of genes involved in fatty acid metabolism were attenuated in miR-155 KO mice after MCD feeding. In contrast, miR-155 deficiency failed to attenuate inflammatory cell infiltration, nuclear factor κ beta (NF-κB) activation and enhanced the expression of the pro-inflammatory cytokines tumor necrosis factor alpha (TNFα) and monocyte chemoattractant protein-1 (MCP1) in MCD diet-fed mice. We found a significant attenuation of apoptosis (cleaved caspase-3) and reduction in collagen and α smooth muscle actin (αSMA) levels in miR-155 KO mice compared to WTs on MCD diet. In addition, we found attenuation of platelet derived growth factor (PDGF), a pro-fibrotic cytokine; SMAD family member 3 (Smad3), a protein involved in transforming growth factor-β (TGFβ) signal transduction and vimentin, a mesenchymal marker and indirect indicator of epithelial-to-mesenchymal transition (EMT) in miR-155 KO mice. Nuclear binding of CCAAT enhancer binding protein β (C/EBPβ) a miR-155 target involved in EMT was significantly increased in miR-155 KO compared to WT mice. CONCLUSIONS Our novel data demonstrate that miR-155 deficiency can reduce steatosis and fibrosis without decreasing inflammation in steatohepatitis.
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Affiliation(s)
- Timea Csak
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Shashi Bala
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Dora Lippai
- 2nd Department of Medicine, Semmelweis University, Budapest, Hungary
| | - Karen Kodys
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Donna Catalano
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Arvin Iracheta-Vellve
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Gyongyi Szabo
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
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