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Shao M, Zhang J, Zhang J, Shi H, Zhang Y, Ji R, Mao F, Qian H, Xu W, Zhang X. SALL4 promotes gastric cancer progression via hexokinase II mediated glycolysis. Cancer Cell Int 2020; 20:188. [PMID: 32489324 PMCID: PMC7247129 DOI: 10.1186/s12935-020-01275-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Accepted: 05/16/2020] [Indexed: 02/11/2023] Open
Abstract
Background The stem cell factor SALL4 is reactivated in human cancers. SALL4 plays diverse roles in tumor growth, metastasis, and drug resistance, but its role in tumor metabolism has not been well characterized. Methods The glycolytic levels of gastric cancer cells were detected by glucose uptake, lactate production, lactate dehydrogenase activity, ATP level, and hexokinase activity. QRT-PCR and western blot were used to detect the changes in the expression of glycolytic genes and proteins. The downstream target genes of SALL4 were identified by microarray. The regulation of hexokinase II (HK-2) by SALL4 was analyzed by luciferase reporter assay and chromatin immunoprecipitation assay. Transwell migration assay, matrigel invasion assay, cell counting assay and colony formation assay were used to study the roles of HK-2 regulation by SALL4 in gastric cancer cells in vitro. The effects of SALL4 on glycolysis and gastric cancer progression in vivo were determined by subcutaneous xenograft and peritoneal metastasis tumor models in nude mice. Results SALL4 knockdown inhibited glucose uptake, lactate production, lactate dehydrogenase activity, ATP level and hexokinase activity in gastric cancer cells, and decreased the expression of glycolytic genes and proteins. Microarray analysis showed that SALL4 knockdown affected glycolysis-related pathway. The regulation of HK-2 gene expression by SALL4 was confirmed by luciferase reporter assay and chromatin immunoprecipitation assay. HK-2 knockdown abrogated the promotion of glycolysis by SALL4 in gastric cancer cells, indicating that HK-2 acts as a downstream effector of SALL4. Moreover, HK-2 knockdown reversed the promoting role of SALL4 in gastric cancer cell proliferation, migration and invasion, suggesting that SALL4 drives gastric cancer progression by upregulating HK-2. Conclusions SALL4 promotes gastric cancer progression through HK-2-mediated glycolysis, which reveals a new mechanism for the oncogenic roles of SALL4 in cancer.
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Affiliation(s)
- Meng Shao
- Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu 212013 China
| | - Jiayin Zhang
- Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu 212013 China
| | - Jiahui Zhang
- Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu 212013 China
| | - Hui Shi
- Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu 212013 China
| | - Yu Zhang
- Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu 212013 China
| | - Runbi Ji
- Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu 212013 China.,Department of Clinical Laboratory Medicine, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu 212002 China
| | - Fei Mao
- Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu 212013 China
| | - Hui Qian
- Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu 212013 China
| | - Wenrong Xu
- Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu 212013 China
| | - Xu Zhang
- Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu 212013 China
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Ma Y, Xue H, Wang W, Yuan Y, Liang F. The miR-567/RPL15/TGF-β/Smad axis inhibits the stem-like properties and chemo-resistance of gastric cancer cells. Transl Cancer Res 2020; 9:3539-3549. [PMID: 35117718 PMCID: PMC8797273 DOI: 10.21037/tcr.2020.04.13] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 03/26/2020] [Indexed: 11/06/2022]
Abstract
BACKGROUND Gastric cancer (GC) is the second most significant contributor to cancer-related mortality in China. GC treatment is often hindered by metastasis and chemoresistance, which leads to poor prognosis. This study set out to investigate the role of miR-567 on the stem-like properties and chemo-resistance of GC cells, as well as its potential molecular mechanism. METHODS The expression of miR-567 in GES-1, AGS, SCG-7901, MGC-803, SUN-16, and MKN1 cell lines was detected by Real-time PCR. AGS cells were transfected with NC or miR-567 mimics and RPL15 3'UTR (wt) or RPL15 3'UTR (mut) using Lipofectamine 2000. CCK-8, 5-ethynyl-2'-deoxyuridine (EdU) assay were detected the effect of miR-567/RPL15/TGF-β/Smad on gastric cancer cell viability and proliferation, respectively. Western blot were used to analyze the effects of miR-567/RPL15/TGF-β/Smad on protein levels of SOX2, NANOG, ALDH1A1, TGF-β1, TGFβ-R1, SMAD1, P-SMAD1, SMAD2 and P-SMAD2. RESULTS The results showed that the expression of miR-567 was down-regulated in GC cell lines. TargetScan and luciferase report assay indicated that RPL15 was the target of miR-567. Functional analysis discovered that the overexpression of miR-567 inhibited the microsphere formation of AGS stem cells, while PRL15 overexpression promoted the formation of microspheres in AGS cells. Through Western blot analysis, miR-567 overexpression was further revealed to inhibit the expression of stem-like marker proteins (SOX2, NANOG, and ALDH1A1). Furthermore, PRL15 overexpression was found to significantly promote the growth of AGS/DDP cells, while miR-567 overexpression reversed the effect of PRL15 on cisplatin-resistant cell growth. The relationship between miR-567 and the TGF-β1/TGFβ-R1/Smad2/Smad3 pathway was also shown. The addition of TGF-β/Smad pathway inhibitor LY 3200882 significantly inhibited the expression of PRL-15, TGF-β1, TGF-R1, p-Smad1, and p-sSmad2, while reversing the effect of miR-567 inhibitor on stem-like properties and chemical resistance. CONCLUSIONS Finally, this study elucidated the effect of miR-567 on the stem-like properties and chemical resistance of GC cells via the RPL15 /TGF-beta/Smad axis.
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Affiliation(s)
- Yuan Ma
- Department of Thoracic Surgery, Xianyang First People's Hospital, Xianyang 712000, China
| | - Hua Xue
- Department of Thoracic Surgery, Xianyang First People's Hospital, Xianyang 712000, China
| | - Weifeng Wang
- Department of Thoracic Surgery, Xianyang First People's Hospital, Xianyang 712000, China
| | - Yaying Yuan
- Department of Thoracic Surgery, Xianyang First People's Hospital, Xianyang 712000, China
| | - Fang Liang
- Department of Thoracic Surgery, Xianyang First People's Hospital, Xianyang 712000, China
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Mechanisms of the Epithelial-Mesenchymal Transition and Tumor Microenvironment in Helicobacter pylori-Induced Gastric Cancer. Cells 2020; 9:cells9041055. [PMID: 32340207 PMCID: PMC7225971 DOI: 10.3390/cells9041055] [Citation(s) in RCA: 103] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 04/16/2020] [Accepted: 04/17/2020] [Indexed: 12/11/2022] Open
Abstract
Helicobacter pylori (H. pylori) is one of the most common human pathogens, affecting half of the world’s population. Approximately 20% of the infected patients develop gastric ulcers or neoplastic changes in the gastric stroma. An infection also leads to the progression of epithelial–mesenchymal transition within gastric tissue, increasing the probability of gastric cancer development. This paper aims to review the role of H. pylori and its virulence factors in epithelial–mesenchymal transition associated with malignant transformation within the gastric stroma. The reviewed factors included: CagA (cytotoxin-associated gene A) along with induction of cancer stem-cell properties and interaction with YAP (Yes-associated protein pathway), tumor necrosis factor α-inducing protein, Lpp20 lipoprotein, Afadin protein, penicillin-binding protein 1A, microRNA-29a-3p, programmed cell death protein 4, lysosomal-associated protein transmembrane 4β, cancer-associated fibroblasts, heparin-binding epidermal growth factor (HB-EGF), matrix metalloproteinase-7 (MMP-7), and cancer stem cells (CSCs). The review summarizes the most recent findings, providing insight into potential molecular targets and new treatment strategies for gastric cancer.
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Kay N, Huang CY, Shiu LY, Yu YC, Chang Y, Suen JL, Tsai EM, Huang SJ. The Effects of Anti-TGF-β1 on Epithelial-Mesenchymal Transition in the Pathogenesis of Adenomyosis. Reprod Sci 2020; 27:1698-1706. [PMID: 32253735 DOI: 10.1007/s43032-020-00139-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Accepted: 01/02/2020] [Indexed: 12/17/2022]
Abstract
Adenomyosis is defined as the presence of endometrial glands and stroma in the myometrium. The mechanisms associated with the pathogenesis of adenomyosis remain unclear. Epithelial-mesenchymal transition (EMT) is characterized by losing cell polarity and cell-cell adhesion together with gaining migratory and invasive properties of stromal cells to become mesenchymal stem cells. Transforming growth factor-β1 (TGF-β1), an anti-inflammatory cytokine secreted by multiple cell types, plays a crucial role in embryogenesis and tissue homeostasis. The induction of EMT and ultimate fibrosis by TGF-β1 is suggested to play a critical role in the pathogenesis of adenomyosis. Thus, this study aims to demonstrate the occurrence of EMT in and the effects of anti-TGF-β1 on the pathogenesis of adenomyosis. ICR mice were fed with 1 μg/g body weight of tamoxifen (TAM) by in the first 4 postnatal days (PNDs). Subsequently, the right and left uterine horns were correspondingly injected with or without 10 μg of anti-TGF-β1 neutralizing antibody on PND42 followed by sacrifice on PND64. E-cadherin, vimentin, and α-smooth muscle actin (α-SMA) expression in the uteri was evaluated by qRT-PCR, Western blot, and immunohistochemistry. Clusters of endometrial glands and increased numbers of vimentin-positive stromal cells in the disrupted α-SMA-positive myometrium were observed in the uteri from TAM-treated mice. Numbers of stromal cells in the myometrium and the disrupted myometrial continuity were reduced by anti-TGF-β1. Moreover, uterine expression of E-cadherin and vimentin/α-SMA was increased and decreased by anti-TGF-β1 treatment, respectively. Anti-TGF-β1 successfully inhibits EMT and the development of adenomyosis in mouse uteri.
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Affiliation(s)
- Nari Kay
- Department of Obstetrics and Gynecology, E-Da Hospital, Kaohsiung, Taiwan.,Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, 100, Tzyou 1st Rd., Kaohsiung, 807, Taiwan
| | - Chun-Yen Huang
- Department of Medical Research, E-Da Hospital, Kaohsiung, Taiwan
| | - Li-Yen Shiu
- Department of Medical Research, E-Da Hospital, Kaohsiung, Taiwan
| | - Ya-Chun Yu
- Department of Medical Research, E-Da Hospital, Kaohsiung, Taiwan
| | - Yu Chang
- Department of Obstetrics and Gynecology, E-Da Hospital, Kaohsiung, Taiwan.,School of Medicine, College of Medicine, I-Shou University, Kaohsiung, Taiwan
| | - Jau-Ling Suen
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, 100, Tzyou 1st Rd., Kaohsiung, 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Eing-Mei Tsai
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, 100, Tzyou 1st Rd., Kaohsiung, 807, Taiwan. .,Department of Obstetrics and Gynecology, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.
| | - S Joseph Huang
- Department of Obstetrics and Gynecology, E-Da Hospital, Kaohsiung, Taiwan. .,School of Medicine, College of Medicine, I-Shou University, Kaohsiung, Taiwan. .,Department of Obstetrics and Gynecology, Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs Blvd., MDC48, Tampa, FL, 33612, USA.
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Overexpression of Sal-like protein 4 in head and neck cancer: epigenetic effects and clinical correlations. Cell Oncol (Dordr) 2020; 43:631-641. [PMID: 32240499 DOI: 10.1007/s13402-020-00509-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/16/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Sal-like protein 4 (SALL4), an embryonic stem cell factor, has been reported to play an essential role in embryogenesis and oncogenesis. As yet, however, the expression and role of this transcription factor in head and neck squamous cell carcinoma (HNSCC) has not been established. METHODS We assessed SALL4 mRNA expression in a well-characterised dataset of 230 HNSCC samples (test cohort 110 cases and validation cohort 120 cases). We also transfected HNSCC cells (FaDu and UM-SCC-6) with SALL4 siRNA and assessed its effects on proliferation and expression of specific epigenetic factors in order to uncover the role of SALL4 in HNSCC. RESULTS Overexpression of SALL4 was detected in tumour samples of both cohorts. HNSCC cells treated with SALL4 siRNA showed a reduction in growth and a decrease in DNA methyltransferase 3 alpha (DNMT3A) expression. In the patient cohorts, SALL4 overexpression was found to significantly correlate with disease recurrence (p < 0.001) and SALL4 methylation status (p = 0.002). We also found that DNMT3A was significantly upregulated upon SALL4 upregulation (p < 0.001). High expression levels of SALL4 correlated with decreases in disease-free survival (DFS) rates (log-rank test, p < 0.001). Multivariate analysis revealed that SALL4 expression served as an independent prognostic factor for DFS (hazard ratio: 2.566, 95% confidence interval: 1.598-4.121; p < 0.001). CONCLUSIONS Our findings indicate that SALL4 upregulation correlates with HNSCC tumour aggressiveness and an adverse patient outcome. Our findings also indicate that DNMT3A may synergistically contribute to the regulatory effects of SALL4. Our findings provide insight into SALL4-mediated HNSCC development via epigenetic modulation.
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The role of contextual signal TGF-β1 inducer of epithelial mesenchymal transition in metastatic lung adenocarcinoma patients with brain metastases: an update on its pathological significance and therapeutic potential. Contemp Oncol (Pozn) 2019; 23:187-194. [PMID: 31992949 PMCID: PMC6978756 DOI: 10.5114/wo.2019.91543] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 11/04/2019] [Indexed: 02/07/2023] Open
Abstract
Lung adenocarcinoma (LA) is the most common cause of cancer-related death worldwide. Despite the advances over last decade in new targeted therapies, cancer genetics, diagnostics, staging, and surgical techniques as well as new chemotherapy and radiotherapy protocols, the death rate from LA remains high. The tumour microenvironment is composed of several cytokines, one of which is transforming growth factor β1 (TGF-β1), which modulates and mediates the expression of epithelial-mesenchymal transition (EMT), correlated with invasive growth in LAs, and exhibits its pleiotropic effects through binding to transmembrane receptors TβR-1 (also termed activin receptor-like kinases – ALKs) and TβR-2. Accordingly, there is an urgent need to elucidate the molecular mechanisms associated with the tumoural spreading process and therapeutic resistance of this serious pathology. In this review, we briefly discuss the current role of contextual signal TGF-β1 inducer of epithelial mesenchymal transition in metastatic lung adenocarcinoma patients with brain metastases, and give an overview of our current mechanistic understanding of the TGF-β1-related pathways in brain metastases progression, TGF-β1 pathway inhibitors that could be used for clinical treatment, and examination of models used to study these processes. Finally, we summarise the current progress in the therapeutic approaches targeting TGF-β1.
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Xu X, Liu M. miR-522 stimulates TGF-β/Smad signaling pathway and promotes osteosarcoma tumorigenesis by targeting PPM1A. J Cell Biochem 2019; 120:18425-18434. [PMID: 31190351 DOI: 10.1002/jcb.29160] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Revised: 05/18/2019] [Accepted: 05/23/2019] [Indexed: 12/19/2022]
Abstract
Osteosarcoma (OS) is identified as an aggressive malignancy of the skeletal system and normally occurs among young people. It is well accepted that microRNAs are implicated in biological activities of diverse tumors. Although miR-522 has been proved to elicit oncogenic properties in a wide range of human cancers, the physiological function and latent mechanism of miR-522 in OS tumorigenesis remain largely to be probed. In the current study, we certified that miR-522 was highly expressed in OS cells and presented carcinogenic function by contributing to cell proliferation, migration, and EMT progression whereas dampening cell apoptosis. In addition, miR-522 provoked TGF-β/Smad pathway through targeting PPM1A. Finally, the results of mechanism experiments elucidated that miR-522 stimulated TGF-β/Smad pathway to induce the development of OS via targeting PPM1A, which exposed that miR-522 may become a promising curative target for OS patients.
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Affiliation(s)
- Xiqiang Xu
- Department of Spine Surgery, Shandong Provincial Hospital affiliated to Shandong University, Jinan, China
| | - Mengmeng Liu
- Department of Anesthesiology, Shandong Provincial Hospital affiliated to Shandong University, Jinan, China
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Ruan JS, Zhou H, Yang L, Wang L, Jiang ZS, Sun H, Wang SM. Ursolic Acid Attenuates TGF-β1-Induced Epithelial-Mesenchymal Transition in NSCLC by Targeting Integrin αVβ5/MMPs Signaling. Oncol Res 2019; 27:593-600. [PMID: 28911340 PMCID: PMC7848462 DOI: 10.3727/096504017x15051723858706] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Transforming growth factor-β1 (TGF-β1)-induced epithelial-mesenchymal transition (EMT) of non-small cell lung cancer (NSCLC) may contribute to tumor metastasis. TGF-β1-induced EMT in H1975 cells (a human NSCLC cell line) resulted in the adoption of mesenchymal responses that were predominantly mediated via the TGF-β1-integrin signaling pathway. Ursolic acid has been previously reported to inhibit tumor growth and metastasis in several cancers. However, whether ursolic acid can attenuate TGF-β1-induced EMT in H1975 cells and its underlying mechanisms remain unknown. In this study, ursolic acid significantly attenuated the TGF-β1-induced decrease in E-cadherin level and elevated the level of N-cadherin. Furthermore, ursolic acid inhibited the mesenchymal-like responses in H1975 cells, including cell migration, invasion, and activity of matrix metallopeptidase (MMP)-2 and -9. Finally, our new findings provided evidence that ursolic acid could inhibit EMT in NSCLC through TGF-β1 signaling pathway-mediated integrin αVβ5 expression, and this might be the potential mechanism of resveratrol on the inhibition of invasion and metastases in NSCLC. We conclude that ursolic acid attenuated TGF-β1-induced EMT in H1975 cells and thus might be a promising therapeutic agent for treating NSCLC.
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Affiliation(s)
- Jun Shan Ruan
- *Fujian Provincial Hospital, Shengli Clinical Medical College of Fujian Medical University, Fujian, P.R. China
- †Molecular Biology Laboratory of Traditional Chinese Medicine, Fujian Provincial Hospital, Fujian, P.R. China
| | - Huan Zhou
- *Fujian Provincial Hospital, Shengli Clinical Medical College of Fujian Medical University, Fujian, P.R. China
| | - Lin Yang
- ‡Fujian Medical University Cancer Hospital, Fujian, P.R. China
| | - Ling Wang
- *Fujian Provincial Hospital, Shengli Clinical Medical College of Fujian Medical University, Fujian, P.R. China
| | - Zong Sheng Jiang
- §The School of Pharmacy, Fujian Medical University, Fujian, P.R. China
| | - Hong Sun
- *Fujian Provincial Hospital, Shengli Clinical Medical College of Fujian Medical University, Fujian, P.R. China
| | - Shao Ming Wang
- *Fujian Provincial Hospital, Shengli Clinical Medical College of Fujian Medical University, Fujian, P.R. China
- †Molecular Biology Laboratory of Traditional Chinese Medicine, Fujian Provincial Hospital, Fujian, P.R. China
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Blockage of TGF- α Induced by Spherical Silica Nanoparticles Inhibits Epithelial-Mesenchymal Transition and Proliferation of Human Lung Epithelial Cells. BIOMED RESEARCH INTERNATIONAL 2019; 2019:8231267. [PMID: 30906781 PMCID: PMC6398060 DOI: 10.1155/2019/8231267] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 01/23/2019] [Indexed: 12/20/2022]
Abstract
Background. Xuanwei City in Yunnan province has been one of the towns with highest lung cancer mortality in China. The high content of amorphous silica in the bituminous coal from Xuanwei of Yunnan is mainly present as irregular and spherical silica nanoparticles (SiNPs). It has been reported that silica nanoparticles in bituminous coal correlated with the high incidence of lung cancer in Xuanwei. To explore the role and mechanism of SiNPs in the tumorigenesis of lung cancer in Xuanwei, human mononuclear cells (THP-1) and human bronchial epithelial cells (BEAS-2B) were cocultured in a transwell chamber. Combined with Benzo[a]pyrene-7, 8-dihydrodiol-9, and 10-epoxide (BPDE), SiNPs could significantly promote the proliferation and Epithelial-Mesenchymal Transition (EMT) and inhibit apoptosis of BEAS-2B cells and induce the release of TGF-α from THP-1 cells. After neutralizing TGF-α with antibody, the proliferation and EMT were decreased and enhanced apoptosis of BEAS-2B cells. Furthermore, the results showed that TGF-α in the sera of patients with lung adenocarcinoma in Xuanwei were significantly higher than in patients with benign pulmonary lesions in Xuanwei and those with lung adenocarcinoma in outside of Xuanwei of Yunnan. Taken together, our study found that SiNPs promoted the proliferation and EMT of BEAS-2B cells by inducing the release of TGF-α from THP-1 cells.
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Structure Identification of ViceninII Extracted from Dendrobium officinale and the Reversal of TGF-β1-Induced Epithelial⁻Mesenchymal Transition in Lung Adenocarcinoma Cells through TGF-β/Smad and PI3K/Akt/mTOR Signaling Pathways. Molecules 2019; 24:molecules24010144. [PMID: 30609689 PMCID: PMC6337427 DOI: 10.3390/molecules24010144] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 12/19/2018] [Accepted: 12/20/2018] [Indexed: 12/24/2022] Open
Abstract
ViceninII is a naturally flavonoid glycoside extracted from Dendrobium officinale, a precious Chinese traditional herb, has been proven to be valuable for cancer treatment. Transforming growth factor-β1 (TGF-β1), promotes the induction of epithelial–mesenchymal transition (EMT), a process involved in the metastasis of cells that leads to enhanced migration and invasion. However, there is no previously evidence that ViceninII has an inhibitory effect on cancer metastasis, specifically on the TGF-β1-induced EMT process in lung adenocarcinoma cells. In this experiment, we used UV, ESIMS, and NMR to identify the structure of ViceninII.A549 and H1299 cells were treated with TGF-β1 in the absence and presence of ViceninII, and subsequent migration and invasion were measured by wound-healing and transwell assays. The protein localization and expressions were detected by immunofluorescence and Western blotting. The results indicated that TGF-β1 induced spindle-shaped changes, increased migration and invasion, and upregulated or downregulated the relative expression of EMT biomarkers. Meanwhile, these alterations were significantly inhibited when co-treated with ViceninII and inhibitors LY294002 and SB431542. In conclusion, ViceninII inhibited TGF-β1-induced EMT via the deactivation of TGF-β/Smad and PI3K/Akt/mTOR signaling pathways.This is the first time that the anti-metastatic effects of ViceninII have been demonstrated, and their molecular mechanisms provided.
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