1
|
Bai Y, Qiao L, Xie N, Li Y, Nie Y, Pan Y, Shi Y, Wang J, Liu N. TOB1 suppresses proliferation in K-Ras wild-type pancreatic cancer. Cancer Med 2019; 9:1503-1514. [PMID: 31891232 PMCID: PMC7013073 DOI: 10.1002/cam4.2756] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Revised: 11/20/2019] [Accepted: 11/21/2019] [Indexed: 12/25/2022] Open
Abstract
TOB1 participates in various kinds of cancers. However, its role in pancreatic cancer has rarely been reported. In this study, we explored the expression and mechanisms of TOB1 in regulating the malignant phenotype of pancreatic cancer cells. TOB1 expression was determined by data mining and immunohistochemistry (IHC), and its localization was observed by immunofluorescence. CCK‐8 cell proliferation, colony formation, flow cytometric, transwell migration, and Western blot (WB) assays were used to examine how it impacts the malignant phenotype of pancreatic cancer. Furthermore, Foxa2 binding to TOB1 was tested by dual‐luciferase reporter assays, and RNA‐Seq was performed to identify signaling pathways. We found TOB1 was downregulated in pancreatic cancer tissues and was mainly located in the cytoplasm. TOB1 overexpression reduced the proliferation of K‐Ras wild‐type pancreatic cancer cells but made no difference to cell migration and invasion. Foxa2 overexpression significantly enhanced TOB1 promoter activity. Moreover, overexpressing TOB1 substantially enriched the calcium pathway in K‐Ras wild‐type pancreatic cancer cells. In conclusion, TOB1 may suppress the proliferation of K‐Ras wild‐type pancreatic cancer cells by regulating calcium pathway genes.
Collapse
Affiliation(s)
- Yuru Bai
- Department of Gastroenterology, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.,Shaanxi Key Laboratory of Gastrointestinal Motility Disorders, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.,Department of Geriatric Respiratory and Endocrinology (The Third Unit of Cadre's Ward), the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Lu Qiao
- Department of Gastroenterology, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.,Shaanxi Key Laboratory of Gastrointestinal Motility Disorders, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Ning Xie
- Department of Gastroenterology, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.,Shaanxi Key Laboratory of Gastrointestinal Motility Disorders, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Yan Li
- Department of Gastroenterology, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.,Shaanxi Key Laboratory of Gastrointestinal Motility Disorders, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Yongzhan Nie
- State Key Laboratory of Cancer Biology, the Fourth Military Medical University, Xi'an, Shaanxi, China.,Xijing Hospital of Digestive Diseases, Xijing Hospital, the Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Yan Pan
- State Key Laboratory of Cancer Biology, the Fourth Military Medical University, Xi'an, Shaanxi, China.,Xijing Hospital of Digestive Diseases, Xijing Hospital, the Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Yupeng Shi
- State Key Laboratory of Cancer Biology, the Fourth Military Medical University, Xi'an, Shaanxi, China.,Xijing Hospital of Digestive Diseases, Xijing Hospital, the Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Jinhai Wang
- Department of Gastroenterology, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.,Shaanxi Key Laboratory of Gastrointestinal Motility Disorders, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Na Liu
- Department of Gastroenterology, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.,Shaanxi Key Laboratory of Gastrointestinal Motility Disorders, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| |
Collapse
|
2
|
Zhou ZR, Yang ZZ, Yu XL, Guo XM. Highlights on molecular targets for radiosensitization of breast cancer cells: Current research status and prospects. Cancer Med 2018; 7:3110-3117. [PMID: 29856131 PMCID: PMC6051209 DOI: 10.1002/cam4.1588] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2017] [Revised: 05/09/2018] [Accepted: 05/10/2018] [Indexed: 12/16/2022] Open
Abstract
In the past, searching for effective radiotherapy sensitization molecular targets and improving the radiation sensitivity of malignant tumors was the hot topic for the oncologists, but with little achievements. We will summarize the research results about breast cancer irradiation sensitization molecular targets over the past two decades; we mainly focus on the following aspects: DNA damage repair and radiation sensitization, cell cycle regulation and radiation sensitization, cell autophagy regulation and radiation sensitization, and radiation sensitivity prediction and breast cancer radiotherapy scheme making. And based on this summary, we will put forward some of our viewpoints.
Collapse
Affiliation(s)
- Zhi-Rui Zhou
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Zhao-Zhi Yang
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Xiao-Li Yu
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Xiao-Mao Guo
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| |
Collapse
|
3
|
Yuan XS, Wang ZT, Hu YJ, Bao FC, Yuan P, Zhang C, Cao JL, Lv W, Hu J. Downregulation of RUVBL1 inhibits proliferation of lung adenocarcinoma cells by G1/S phase cell cycle arrest via multiple mechanisms. Tumour Biol 2016; 37:10.1007/s13277-016-5452-9. [PMID: 27722820 DOI: 10.1007/s13277-016-5452-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 09/23/2016] [Indexed: 02/08/2023] Open
Abstract
Lung cancer remains a leading cause of cancer-related mortality and morbidity worldwide, of which non-small cell lung cancer (NSCLC) accounts for 80 %. RUVBL1 is a highly conserved eukaryotic AAA+ adenosine 5'-triphosphatase (ATPase) that has many functions highly relevant to cancer. We therefore attempted to determine the potential role of RUVBL1 in the biogenesis of lung adenocarcinoma and obtained some interesting results. Our study revealed that RUVBL1 expression was higher in lung adenocarcinoma specimens than in those of adjacent non-tumor tissues and in lung cancer cell lines than in normal lung cell lines. RUVBL1 knockdown via siRNA reduced proliferation and caused G1/S phase cell cycle arrest in lung adenocarcinoma cell lines. The G1/S phase cell cycle arrest triggered by RUVBL1 downregulation could be attributed, at least in part, to repression of the AKT/GSK-3β/cyclin D1 pathway and probably to the activation of IRE1α-mediated endoplasmic reticulum (ER) stress. We thus demonstrated for the first time that a knockdown of RUVBL1 could effectively inhibit the proliferation of lung adenocarcinoma A549 and H292 cells through the induction of G1/S phase cell cycle arrest via multiple mechanisms. These observations strongly suggested that RUVBL1 should be considered a promising target for the prevention or therapy of lung adenocarcinoma.
Collapse
Affiliation(s)
- Xiao-Shuai Yuan
- Department of Thoracic Surgery, First Affiliated Hospital of Zhejiang University, No.79, Qingchun Road, Hangzhou, China
| | - Zhi-Tian Wang
- Department of Thoracic Surgery, First Affiliated Hospital of Zhejiang University, No.79, Qingchun Road, Hangzhou, China
| | - Ye-Ji Hu
- Department of Thoracic Surgery, First Affiliated Hospital of Zhejiang University, No.79, Qingchun Road, Hangzhou, China
| | - Fei-Chao Bao
- Department of Thoracic Surgery, First Affiliated Hospital of Zhejiang University, No.79, Qingchun Road, Hangzhou, China
| | - Ping Yuan
- Department of Thoracic Surgery, First Affiliated Hospital of Zhejiang University, No.79, Qingchun Road, Hangzhou, China
| | - Chong Zhang
- Department of Thoracic Surgery, First Affiliated Hospital of Zhejiang University, No.79, Qingchun Road, Hangzhou, China
| | - Jin-Lin Cao
- Department of Thoracic Surgery, First Affiliated Hospital of Zhejiang University, No.79, Qingchun Road, Hangzhou, China
| | - Wang Lv
- Department of Thoracic Surgery, First Affiliated Hospital of Zhejiang University, No.79, Qingchun Road, Hangzhou, China
| | - Jian Hu
- Department of Thoracic Surgery, First Affiliated Hospital of Zhejiang University, No.79, Qingchun Road, Hangzhou, China.
| |
Collapse
|
4
|
Lee HS, Kundu J, Kim RN, Shin YK. Transducer of ERBB2.1 (TOB1) as a Tumor Suppressor: A Mechanistic Perspective. Int J Mol Sci 2015; 16:29815-28. [PMID: 26694352 PMCID: PMC4691146 DOI: 10.3390/ijms161226203] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 11/22/2015] [Accepted: 12/08/2015] [Indexed: 01/06/2023] Open
Abstract
Transducer of ERBB2.1 (TOB1) is a tumor-suppressor protein, which functions as a negative regulator of the receptor tyrosine-kinase ERBB2. As most of the other tumor suppressor proteins, TOB1 is inactivated in many human cancers. Homozygous deletion of TOB1 in mice is reported to be responsible for cancer development in the lung, liver, and lymph node, whereas the ectopic overexpression of TOB1 shows anti-proliferation, and a decrease in the migration and invasion abilities on cancer cells. Biochemical studies revealed that the anti-proliferative activity of TOB1 involves mRNA deadenylation and is associated with the reduction of both cyclin D1 and cyclin-dependent kinase (CDK) expressions and the induction of CDK inhibitors. Moreover, TOB1 interacts with an oncogenic signaling mediator, β-catenin, and inhibits β-catenin-regulated gene transcription. TOB1 antagonizes the v-akt murine thymoma viral oncogene (AKT) signaling and induces cancer cell apoptosis by activating BCL2-associated X (BAX) protein and inhibiting the BCL-2 and BCL-XL expressions. The tumor-specific overexpression of TOB1 results in the activation of other tumor suppressor proteins, such as mothers against decapentaplegic homolog 4 (SMAD4) and phosphatase and tensin homolog-10 (PTEN), and blocks tumor progression. TOB1-overexpressing cancer cells have limited potential of growing as xenograft tumors in nude mice upon subcutaneous implantation. This review addresses the molecular basis of TOB1 tumor suppressor function with special emphasis on its regulation of intracellular signaling pathways.
Collapse
Affiliation(s)
- Hun Seok Lee
- Research Institute of Pharmaceutical Science, Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Juthika Kundu
- Research Institute of Pharmaceutical Science, Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Ryong Nam Kim
- Research Institute of Pharmaceutical Science, Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
- Tumor Microenvironment Global Core Research Center, Seoul National University, Seoul 08826, Korea.
| | - Young Kee Shin
- Research Institute of Pharmaceutical Science, Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
- Tumor Microenvironment Global Core Research Center, Seoul National University, Seoul 08826, Korea.
- The Center for Anti-cancer Companion Diagnostics, School of Biological Science, Institutes of Entrepreneurial BioConvergence, Seoul National University, Seoul 08826, Korea.
| |
Collapse
|
5
|
Recursive Random Lasso (RRLasso) for Identifying Anti-Cancer Drug Targets. PLoS One 2015; 10:e0141869. [PMID: 26544691 PMCID: PMC4636151 DOI: 10.1371/journal.pone.0141869] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 10/14/2015] [Indexed: 02/06/2023] Open
Abstract
Uncovering driver genes is crucial for understanding heterogeneity in cancer. L1-type regularization approaches have been widely used for uncovering cancer driver genes based on genome-scale data. Although the existing methods have been widely applied in the field of bioinformatics, they possess several drawbacks: subset size limitations, erroneous estimation results, multicollinearity, and heavy time consumption. We introduce a novel statistical strategy, called a Recursive Random Lasso (RRLasso), for high dimensional genomic data analysis and investigation of driver genes. For time-effective analysis, we consider a recursive bootstrap procedure in line with the random lasso. Furthermore, we introduce a parametric statistical test for driver gene selection based on bootstrap regression modeling results. The proposed RRLasso is not only rapid but performs well for high dimensional genomic data analysis. Monte Carlo simulations and analysis of the "Sanger Genomics of Drug Sensitivity in Cancer dataset from the Cancer Genome Project" show that the proposed RRLasso is an effective tool for high dimensional genomic data analysis. The proposed methods provide reliable and biologically relevant results for cancer driver gene selection.
Collapse
|
6
|
Wu D, Zhou W, Wang S, Zhou Z, Wang S, Chen L. Tob1 enhances radiosensitivity of breast cancer cells involving the JNK and p38 pathways. Cell Biol Int 2015; 39:1425-30. [PMID: 26377349 DOI: 10.1002/cbin.10545] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Accepted: 09/12/2015] [Indexed: 01/02/2023]
Affiliation(s)
- Dapeng Wu
- Department of Radiotherapy; Huaihe Hospital of Henan University; Kaifeng Henan 475000 China
| | - Weijie Zhou
- Department of Breast and Thyroid Surgery; Huaihe Hospital of Henan University; Kaifeng Henan 475000 China
| | - Shunchang Wang
- Department of Breast and Thyroid Surgery; Huaihe Hospital of Henan University; Kaifeng Henan 475000 China
| | - Zhenyu Zhou
- Department of Breast and Thyroid Surgery; Huaihe Hospital of Henan University; Kaifeng Henan 475000 China
| | - Sheng Wang
- Department of Breast and Thyroid Surgery; Huaihe Hospital of Henan University; Kaifeng Henan 475000 China
| | - Lei Chen
- Department of Radiotherapy; Huaihe Hospital of Henan University; Kaifeng Henan 475000 China
| |
Collapse
|
7
|
JIAO YANG, LIU CHANG, CUI FENGMEI, XU JIAYING, TONG JIAN, QI XIAOFEI, WANG LILI, ZHU WEI. Long intergenic non-coding RNA induced by X-ray irradiation regulates DNA damage response signaling in the human bronchial epithelial BEAS-2B cell line. Oncol Lett 2015; 9:169-176. [PMID: 25435953 PMCID: PMC4247013 DOI: 10.3892/ol.2014.2622] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Accepted: 09/26/2014] [Indexed: 12/24/2022] Open
Abstract
Long non-coding RNAs (lncRNAs) have been regarded as the primary genetic regulators of several important biological processes. However, the biological functions of lncRNAs in radiation-induced lung damage remain largely unknown. The present study aimed to investigate the potential effects of lncRNAs on radiation-induced lung injury (RILI). Female C57BL/6 mice were exposed to 12 Gy single doses of total body irradiation (TBI). LncRNA microarray screening was conducted at 24 h post-irradiation (IR) to investigate the differentially-expressed lncRNAs during RILI. Following the subsequent bioinformatics analysis and reverse transcription-polymerase chain reaction (RT-PCR) validation, one of the verified differentially-expressed long intergenic radiation-responsive ncRNAs (LIRRs), LIRR1, was selected for further functional study. The normal human bronchial epithelial BEAS-2B cell line was used as the cell model. The recombinant eukaryotic expression vector for the lncRNA was designed, constructed and transfected using lipofectamine. RT-PCR, clonogenic and flow cytometry assays, immunofluorescence detection and western blot analysis were performed to reveal the role of the lncRNA in the radiosensitivity regulation of the RILI target cells. In lung tissues 24 h after 12 Gy TBI, six of the identified differentially-expressed LIRRs near the coding genes were validated using quantitative (q)PCR. The upregulation of two LIRRs was observed and confirmed using qPCR. LIRR1 was chosen for further functional study. Following the stable transfection of LIRR1, identified through G418 screening, increased radiosensitivity, evident cell cycle G1 phase arrest and increased γ-H2AX foci formation were observed in the bronchial epithelial BEAS-2B cell line subsequent to IR. LIRR1 overexpression also led to decreased expression of the KU70, KU80 and RAD50 DNA repair proteins, marked activation of p53, decreased mouse double minute 2 homolog (MDM2) expression, and substantially induced p21 and suppressed cyclin-dependent kinase 2 in BEAS-2B following IR. Subsequent to the use of Pifithrin-α, a specific inhibitor of p53 activation, increased MDM2 expression was observed in the LIRR1-overexpressing cells, suggesting that LIRR1 could mediate the DNA damage response (DDR) signaling in a p53-dependent manner. The present study provides a novel mechanism for RILI, using the concept of lncRNAs.
Collapse
Affiliation(s)
- YANG JIAO
- Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, Jiangsu 215123, P.R. China
| | - CHANG LIU
- Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, Jiangsu 215123, P.R. China
| | - FENG-MEI CUI
- Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, Jiangsu 215123, P.R. China
| | - JIA-YING XU
- Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, Jiangsu 215123, P.R. China
| | - JIAN TONG
- School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu 215123, P.R. China
| | - XIAO-FEI QI
- Department of Radiotherapy, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - LI-LI WANG
- Department of Urology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - WEI ZHU
- Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, Jiangsu 215123, P.R. China
| |
Collapse
|
8
|
WU XIAOYANG, CHE JUN, SUN KEKANG, SHEN XIAOJUN, YANG DONG, ZHONG NING, ZHAO HUA. Cyclopamine increases the radiosensitivity of human pancreatic cancer cells by regulating the DNA repair signal pathway through an epidermal growth factor receptor-dependent pathway. Mol Med Rep 2013; 8:979-83. [DOI: 10.3892/mmr.2013.1605] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2012] [Accepted: 07/05/2013] [Indexed: 11/05/2022] Open
|
9
|
Che J, Lu YW, Sun KK, Feng C, Dong AJ, Jiao Y. Overexpression of TOB1 confers radioprotection to bronchial epithelial cells through the MAPK/ERK pathway. Oncol Rep 2013; 30:637-42. [PMID: 23756562 DOI: 10.3892/or.2013.2536] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2012] [Accepted: 03/06/2013] [Indexed: 11/06/2022] Open
Abstract
The aim of this study was to investigate the effects and mechanisms of antiproliferative transducer of erbB2, 1 (TOB1) on the radiosensitivity of the normal human bronchial epithelial cell line HBE. After exposure to different doses of irradiation or a certain dose for different time intervals, the expression of TOB1 mRNA and protein in HBE cells was determined by semi-quantitative RT-PCR and western blot analysis. Liposome-induced recombinant plasmid transfection and G418 selection were performed to establish a stably transfected TOB1-overexpressing HBE cell line. A clonogenic assay was used to determine the radiosensitivity of the HBE cells with different TOB1 expression statuses. The cell cycle distribution was detected by flow cytometry. The ionizing radiation (IR)-induced γ-H2AX foci formation was detected by immunofluorescence assay. The related mechanism was explored by western blot analysis. TOB1 expression in the HBE cells was not induced by IR, neither dose-dependently nor time-dependently. Compared to the parental or 'mock' transfected HBE cells, the radiosensitivity of HBE cells overexpressing TOB1 was significantly decreased (P<0.05). Exogenous TOB1 prevented HBE cells from apoptosis after IR, in contrast to the control cells (P<0.05), and significantly decreased the IR-induced γ-H2AX foci formation. After IR, the expression of DNA damage repair proteins such as XRCC1, MRE11, FEN1 and ATM was increased in the TOB1‑overexpressing HBE cells when compared with the expression levels in the control cells. HBE/TOB1 cells presented a much higher phosphorylated ERK1/2 and phosphorylated p53 when compared with the levels in the control cell lines when receiving 6 Gy of X-rays. Notably, the increased expression of phosphorylated p53 in HBE/TOB1 cells after IR was sufficiently blocked by U0126, a specific inhibitor of MEK1/2. Different from its functions in several lung cancer cell lines, TOB1 demonstrated a radioprotective function in the immortalized normal human bronchial epithelial cell line HBE via the MAPK/ERK signaling pathway.
Collapse
Affiliation(s)
- Jun Che
- Department of Head and Neck Radiotherapy, the Fourth People's Hospital of Wuxi, Wuxi 214062, PR China
| | | | | | | | | | | |
Collapse
|
10
|
SUN KEKANG, ZHONG NING, YANG YANG, ZHAO LIN, JIAO YANG. Enhanced radiosensitivity of NSCLC cells by transducer of erbB2.1 (TOB1) through modulation of the MAPK/ERK pathway. Oncol Rep 2013; 29:2385-91. [DOI: 10.3892/or.2013.2403] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Accepted: 02/26/2013] [Indexed: 11/06/2022] Open
|
11
|
Sun KK, Ji C, Li X, Zhang L, Deng J, Zhong N, Wu XY. Overexpression of high mobility group protein B1 correlates with the proliferation and metastasis of lung adenocarcinoma cells. Mol Med Rep 2013; 7:1678-82. [PMID: 23467607 DOI: 10.3892/mmr.2013.1362] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Accepted: 02/27/2013] [Indexed: 11/06/2022] Open
Abstract
High mobility group protein B1 (HMGB1) plays an important role in a number of clinical conditions, such as autoimmunity, cardiovascular disease and cancer. Evidence suggests that HMGB1 is critical in the development and progression of numerous types of tumor. However, the underlying molecular mechanisms for the HMGB1-mediated progression and metastasis of lung cancer have not yet been elucidated. In this study, we investigated the role of HMGB1 in lung adenocarcinoma and the mechanisms by which it contributes to carcinogenesis and metastasis. We demonstrated that there was an increase in the expression of HMGB1 in primary cancer tissues compared to the matched adjacent non-cancerous tissues. The expression levels of TOB1 in the normal human bronchial epithelial (HBE) cell line and 10 lung cancer cell lines were determined by reverse transcription-PCR (RT-PCR). The results revealed that HMGB1 expression increased in 8 cell lines compared with the HBE cell line. The A549 and NCI-H1975 cells were transfected with HMGB1 recombinant plasmid. We discovered that the overexpression of HMGB1 promoted cell growth and metastasis in the 2 cell lines. Further investigation revealed that exogenously expressed HMGB1 enhanced the activation of p38 and Erk1/2, in addition to the expression of nuclear factor (NF)-κB. We propose that HMGB1 functions as a tumor promoter and that it regulates the proliferation and invasion of lung cancer cells by modulating the activation of the Erk1/2 and p38 mitogen-activated protein kinase (MAPK) signaling pathways.
Collapse
Affiliation(s)
- Ke-Kang Sun
- Department of Gastrointestinal Surgery, Thoracic Surgery Division, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, Jiangsu 215300, PR China
| | | | | | | | | | | | | |
Collapse
|
12
|
Che J, Zhang FZ, Zhao CQ, Hu XD, Fan SJ. Cyclopamine is a novel Hedgehog signaling inhibitor with significant anti-proliferative, anti-invasive and anti-estrogenic potency in human breast cancer cells. Oncol Lett 2013; 5:1417-1421. [PMID: 23599805 PMCID: PMC3629107 DOI: 10.3892/ol.2013.1195] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Accepted: 02/04/2013] [Indexed: 01/22/2023] Open
Abstract
Stimulation of Hedgehog (Hh) signaling induces carcinogenesis or promotes cell survival in cancers of multiple organs. In epithelial cancer with aberrant Hedgehog activation, abrogation of Hedgehog signaling by cyclopamine, a naturally occurring Hedgehog-specific small-molecule inhibitor, causes profound inhibition of tumor growth. In the present study, cyclopamine displayed a significant potency in suppressing the proliferation of both estrogen-responsive (MCF-7) and estrogen-independent (MDA-MB-231) human breast cancer cells. Cyclopamine induced a robust G1 cell cycle arrest and elicited notable effects on the expression of cyclin D1 through modulation of the MAPK/ERK signaling pathway. Cyclopamine also inhibited the invasive ability of both breast cancer cell lines by suppressing the expression levels of NF-κB, MMP2 and MMP9 protein. Furthermore, in estrogen-responsive MCF-7 cells, cyclopamine significantly downregulated the production of estrogen receptor-α protein. Our results implicate cyclopamine as a novel, potent inhibitor of human breast cancer proliferation and estrogen responsiveness that could potentially be developed into a promising therapeutic agent for the treatment of breast cancer.
Collapse
Affiliation(s)
- Jun Che
- Key Laboratory of Radiation Biology, School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, Jiangsu 215123; ; Department of Radiation Oncology, The Fourth Hospital Affiliated to Soochow University, Wuxi, Jiangsu 214062, P.R. China
| | | | | | | | | |
Collapse
|
13
|
Oh JH, Wong HP, Wang X, Deasy JO. A bioinformatics filtering strategy for identifying radiation response biomarker candidates. PLoS One 2012; 7:e38870. [PMID: 22768051 PMCID: PMC3387230 DOI: 10.1371/journal.pone.0038870] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Accepted: 05/15/2012] [Indexed: 02/06/2023] Open
Abstract
The number of biomarker candidates is often much larger than the number of clinical patient data points available, which motivates the use of a rational candidate variable filtering methodology. The goal of this paper is to apply such a bioinformatics filtering process to isolate a modest number (<10) of key interacting genes and their associated single nucleotide polymorphisms involved in radiation response, and to ultimately serve as a basis for using clinical datasets to identify new biomarkers. In step 1, we surveyed the literature on genetic and protein correlates to radiation response, in vivo or in vitro, across cellular, animal, and human studies. In step 2, we analyzed two publicly available microarray datasets and identified genes in which mRNA expression changed in response to radiation. Combining results from Step 1 and Step 2, we identified 20 genes that were common to all three sources. As a final step, a curated database of protein interactions was used to generate the most statistically reliable protein interaction network among any subset of the 20 genes resulting from Steps 1 and 2, resulting in identification of a small, tightly interacting network with 7 out of 20 input genes. We further ranked the genes in terms of likely importance, based on their location within the network using a graph-based scoring function. The resulting core interacting network provides an attractive set of genes likely to be important to radiation response.
Collapse
Affiliation(s)
- Jung Hun Oh
- Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, New York, United States of America
| | - Harry P. Wong
- Department of Infectious Diseases, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Xiaowei Wang
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Joseph O. Deasy
- Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, New York, United States of America
| |
Collapse
|
14
|
Kundu J, Wahab SMR, Kundu JK, Choi YL, Erkin OC, Lee HS, Park SG, Shin YK. Tob1 induces apoptosis and inhibits proliferation, migration and invasion of gastric cancer cells by activating Smad4 and inhibiting β‑catenin signaling. Int J Oncol 2012; 41:839-48. [PMID: 22710759 PMCID: PMC3582759 DOI: 10.3892/ijo.2012.1517] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Accepted: 05/08/2012] [Indexed: 01/24/2023] Open
Abstract
Transducer of ErbB-2.1 (Tob1), a tumor suppressor protein, is inactivated in a variety of cancers including stomach cancer. However, the role of Tob1 in gastric carcinogenesis remains elusive. The present study aimed to investigate whether Tob1 could inhibit gastric cancer progression in vitro, and to elucidate its underlying molecular mechanisms. We found differential expression of Tob1 in human gastric cancer (MKN28, AGS and MKN1) cells. The overexpression of Tob1 induced apoptosis in MKN28 and AGS cells, which was associated with sub-G1 arrest, activation of caspase-3, induction of Bax, inhibition of Bcl-2 and cleavage of poly (ADP-ribose) polymerase (PARP). In addition, Tob1 inhibited proliferation, migration and invasion, which were reversed in MKN1 and AGS cells transfected with Tob1 siRNA. Overexpression of Tob1 in MKN28 and AGS cells induced the expression of Smad4, leading to the increased expression and the promoter activity of p15, which was diminished by silencing of Tob1 using specific siRNA. Tob1 decreased the phosphorylation of Akt and glycogen synthase kinase-3β (GSK3β) in MKN28 and AGS cells, resulting in the reduced protein expression and the transcriptional activity of β‑catenin, which in turn decreased the expression of cyclin D1, cyclin-dependent kinase-4 (CDK4), urokinase plasminogen activator receptor (uPAR) and peroxisome proliferator and activator receptor-δ (PPARδ). Conversely, silencing of Tob1 induced the phosphorylation of Akt and GSK-3β, and increased the expression of β‑catenin and its target genes. Collectively, our study demonstrates that the overexpression of Tob1 inhibits gastric cancer progression by activating Smad4- and inhibiting β‑catenin-mediated signaling pathways.
Collapse
Affiliation(s)
- Juthika Kundu
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | | | | | | | | | | | | | | |
Collapse
|
15
|
Jiao Y, Sun KK, Zhao L, Xu JY, Wang LL, Fan SJ. Suppression of human lung cancer cell proliferation and metastasis in vitro by the transducer of ErbB-2.1 (TOB1). Acta Pharmacol Sin 2012; 33:250-60. [PMID: 22158108 DOI: 10.1038/aps.2011.163] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
AIM To investigate the effects of the transducer of ErbB-2.1 (TOB1) on the proliferation, migration and invasion of human lung cancer cells in vitro. METHODS Human lung cancer cell lines (95-D, A549, NCI-H1299, NCI-H1975, NCI-H661, NCI-H446, NCI-H1395, and Calu-3) and the normal human bronchial epithelial (HBE) cell line were tested. The expression levels of TOB1 in the cells were determined with Western blot and RT-PCR analyses. TOB1-overexpressing cell line 95-D/TOB1 was constructed using lipofectamine-induced TOB1 recombinant plasmid transfection and selective G418 cell culture. The A549 cells were transcend-transfected with TOB1-siRNA. MTT assay, flow cytometry and Western blot analysis were used to examine the effects of TOB1 on cancer cell proliferation and wound healing. Transwell invasive assay was performed to evaluate the effects of TOB1 on cancer cell migration and invasion. The activity of MMP2 and MMP9 was measured using gelatin zymography assay. RESULTS The expression levels of TOB1 in the 8 human lung cancer cell lines were significantly lower than that in HBE cells. TOB1 overexpression inhibited the proliferation of 95-D cells, whereas TOB1 knockdown with TOB1-siRNA promoted the growth of A549 cells. Decreased cell migration and invasion were detected in 95-D/TOB1 cells, and the suppression of TOB1 enhanced the metastasis in A549 cells. TOB1 overexpression not only increased the expression of the phosphatase and tensin homolog (PTEN), an important tumor suppressor, but also regulated the downstream effectors in the PI3K/PTEN signaling pathway, including Akt, ERK1/2, etc. In contrast, decreased expression of TOB1 oppositely regulated the expression of these factors. TOB1 also regulates the gelatinase activity of MMP2 and MMP9 in lung cancer cells. CONCLUSION The results demonstrate that the PI3K/PTEN pathway, which is essential for carcinogenesis, angiogenesis, and metastasis, may be one of the possible signaling pathways for regulation of proliferation and metastasis of human lung cancer cells by TOB1 in vitro.
Collapse
|
16
|
Ye J, Ren Z, Gu Q, Wang L, Wang J. Ku80 is differentially expressed in human lung carcinomas and upregulated in response to irradiation in mice. DNA Cell Biol 2011; 30:987-94. [PMID: 21663524 DOI: 10.1089/dna.2010.1196] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Based on the role of Ku80 in mediating radiation-induced DNA repair, we investigated Ku80 expression in human lung cancers of different pathological types and evaluated the effect of radiotherapy on Ku80 expression levels in a mouse model. We used immunohistochemistry and real-time PCR to determine Ku80 protein and mRNA levels, respectively. We inoculated nude mice with A549 cells and subjected the tumor-bearing mice to varying doses of irradiation. Lung carcinoma tissue exhibited higher Ku80 mRNA and protein levels when compared with normal tissue. Among the tumor subtypes, lung adenocarcinoma and lung squamous carcinoma showed higher levels of Ku80 protein and mRNA, compared with small-cell lung carcinoma. There was a dose-dependent and time-dependent increase in Ku80 mRNA levels in nude mice that were inoculated with A549 cells and exposed to varying doses of irradiation. Ku80 may play an important role in the DNA damage response pathway. Higher Ku80 levels in lung squamous carcinoma and adenocarcinoma may explain their lower radiosensitivity when compared with small-cell lung carcinoma. Ku80 expression levels could be useful in predicting radiosensitivity of lung tumors and inhibition of Ku80 may be an interesting target to improve radiosensitivity in lung cancer patients.
Collapse
Affiliation(s)
- Jian Ye
- Department of Pneumology, The First People's Hospital, Hangzhou, China.
| | | | | | | | | |
Collapse
|
17
|
Abe S, Okuda K, Ura T, Kondo A, Yoshida A, Yoshizaki S, Mizuguchi H, Klinman D, Shimada M. Adenovirus type 5 with modified hexons induces robust transgene-specific immune responses in mice with pre-existing immunity against adenovirus type 5. J Gene Med 2009; 11:570-9. [PMID: 19391169 PMCID: PMC7385988 DOI: 10.1002/jgm.1332] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND Adenovirus type 5 (Ad5) is widely used as a vehicle for vaccine delivery in the treatment of infectious disease and cancer. However, the efficacy of Ad5 vectors has been limited in humans because exposure to Ad5 infections results in most adults having neutralizing antibodies against Ad5. To overcome this limitation, the hexon epitope present in the fifth hypervariable region of Ad5 was modified. METHODS To evaluate the ability of Ad5 vectors encoding the HIV env protein to induce Ag-specific immune responses in the face of pre-existing anti-Ad5 immunity, mice were administrated intramuscularly with the Ad-Luc vector, and then vaccinated with parental or hexon-modified Ad5 vectors (Ad-HisHIV, Ad-END/AAAHIV or Ad-HIV) at week 8. HIV-specific cell-mediated immune responses were detected through a combination of tetramer assays and intracellular cytokine staining from weeks 8-23. RESULTS The hexon-modified Ad vector was able to escape from anti-Ad5 neutralizing antibody, and mice with the modified vector generated significantly lower individual neutralizing antibody than those immunized with the parental vector. Furthermore, mice with pre-existing anti-Ad immunity immunized with the modified vector generated significantly stronger cell-mediated anti-env responses than those immunized with the parental vector. CONCLUSIONS These data demonstrate that Ad5 vector with hexon modification reduce their sensitivity to pre-existing anti-Ad immunity and improve their clinical utility.
Collapse
Affiliation(s)
- Shinya Abe
- Department of Molecular Biodefense Research, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Kenji Okuda
- Department of Molecular Biodefense Research, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Takehiro Ura
- Department of Molecular Biodefense Research, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Asami Kondo
- Department of Molecular Biodefense Research, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Atsushi Yoshida
- Department of Molecular Biodefense Research, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Shinji Yoshizaki
- Department of Molecular Biodefense Research, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Hiroyuki Mizuguchi
- Laboratory of Gene Transfer and Regulation, National Institute of Biomedical Innovation, Osaka, Japan
| | - Dennis Klinman
- National Cancer institute, National Institute of Health, Frederick, MD, USA
| | - Masaru Shimada
- Department of Molecular Biodefense Research, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| |
Collapse
|
18
|
Li XL, Meng QH, Fan SJ. Adenovirus-mediated expression of UHRF1 reduces the radiosensitivity of cervical cancer HeLa cells to gamma-irradiation. Acta Pharmacol Sin 2009; 30:458-66. [PMID: 19270723 DOI: 10.1038/aps.2009.18] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
AIM An in vitro study was carried out to determine the effect of UHRF1 overexpression on radiosensitivity in human cervical cancer HeLa cells using adenovirus-mediated UHRF1 gene transfer (Ad5-UHRF1). METHODS Cell survival was evaluated using the clonogenic survival assay and the MTT assay; apoptosis and cell cycle distribution were monitored by flow cytometry. Protein levels were measured by Western blotting. Silencing XRCC4 expression was performed by transfection of small interfering RNA (siRNA). RESULTS Increased expression of UHRF1 by Ad5-UHRF1 significantly reduced the radiosensitivity of HeLa cells. The UHRF1-mediated radioresistance was correlated with increased DNA repair capability and increased expression of the DNA damage repair protein, XRCC4. Knocking down XRCC4 expression in the cells using XRCC4 siRNA markedly reduced the UHRF1-mediated radioresistance. CONCLUSION These results provide the first evidence for revealing a functional role of UHRF1 in human cervical cancer cells as a negative regulator of radiosensitivity.
Collapse
|
19
|
Okoh AI, . MKB, . OOO, . EO. The Culturable Microbial and Chemical Qualities of Some Waters Used for Drinking and Domestic Purposes in a Typical Rural Setting of Southwestern Nigeria. ACTA ACUST UNITED AC 2005. [DOI: 10.3923/jas.2005.1041.1048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|