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Pancreatic cancer cell, microRNA

Cuiyue Wang, Zhen Feng, Kaitong Jiang, Xiuli Zuo
Our goal was to determine the roles and regulatory mechanism of microRNA-935 (miR-935) in the progression of pancreatic cancer. The results showed that, compared with normal pancreatic tissues and cells, the expression of miR-935 was markedly upregulated while INPP4A expression was obviously downregulated in pancreatic cancer tissues and PANC-1 cells. After transfection with miR-935 inhibitor, miR-935 was significantly suppressed, and suppression of miR-935 significantly inhibited cell proliferation, suppressed cell migration, and induced cell apoptosis of pancreatic cancer cells...
October 11, 2016: Oncology Research
Jana Merhautova, Regina Demlova, Ondrej Slaby
Gastrointestinal cancer accounts for the 20 most frequent cancer diseases worldwide and there is a constant urge to bring new therapeutics with new mechanism of action into the clinical practice. Quantity of in vitro and in vivo evidences indicate, that exogenous change in pathologically imbalanced microRNAs (miRNAs) is capable of transforming the cancer cell phenotype. This review analyzed preclinical miRNA-based therapy attempts in animal models of gastric, pancreatic, gallbladder, and colorectal cancer. From more than 400 original articles, 26 was found to assess the effect of miRNA mimics, precursors, expression vectors, or inhibitors administered locally or systemically being an approach with relatively high translational potential...
2016: Frontiers in Pharmacology
Lijun Zhao, Dongling Zou, Xueju Wei, Lanlan Wang, Yuanyuan Zhang, Siqi Liu, Yanmin Si, Hualu Zhao, Fang Wang, Jia Yu, Yanni Ma, Guotao Sun
Pancreatic cancer is a highly lethal disease due to its rapid dissemination and resistance to conventional chemotherapy. MicroRNAs (miRNAs) are emerging as novel regulators of chemoresistance, which modulate the expression of drug resistance-related genes. MiRNA-221 has been reported to be associated with chemoresistance in various types of cancer. But the detailed molecular mechanism about miR-221-3p regulating 5-fluorouracil (5-FU) resistance in human pancreatic cancer remains to be clarified. In this study, we investigated the association between miR-221-3p expression and 5-FU sensitivity...
October 10, 2016: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
Mateusz Olbromski, Jedrzej Grzegrzolka, Alina Jankowska-Konsur, Wojciech Witkiewicz, Marzena Podhorska-Okolow, Piotr Dziegiel
Recent statistics show that lung cancer is the second most common malignant tumor in the world (14% of all cancers in the USA), both in terms of morbidity and mortality. The mortality of this type of tumor shows an increasing trend (28% for men and 26% for women). Lung squamous cell carcinoma (LSCC) is the second‑largest histological subtype of non‑small cell lung cancers (NSCLCs) after adenocarcinoma. SRY‑related HMG‑box 18 (SOX18) protein is an important transcription factor involved in the development of the cardiovascular system and the lymphatic ducts...
September 19, 2016: Oncology Reports
Sung-Jae Baek, Katsutoshi Sato, Naohiro Nishida, Jun Koseki, Rikako Azuma, Koichi Kawamoto, Masamitsu Konno, Kazuhiko Hayashi, Taroh Satoh, Yuichiro Doki, Masaki Mori, Hideshi Ishii, Kazuhiko Ogawa
In this study, we compared the microRNA (miRNA) profiles of a control and X-ray- and carbon ion beam-resistant cells to identify miRNAs that can be used as radiosensitizers and biomarkers. Mouse squamous cell carcinoma line NR-S1, its X-ray-resistant derivative X60, and its carbon ion beam‑resistant derivative C30 were subjected to miRNA microarray analysis. Expression of miRNAs shown to be upregulated or downregulated in the microarray analysis was confirmed by qRT-PCR. Downregulated miRNAs were overexpressed in human pancreatic cancer cell lines PANC1 and MIA PaCa-2, and the resulting cells were tested for radiosensitivity using colony-forming and sphere-forming assays...
September 22, 2016: Oncology Reports
Weihua Chang, Menggang Liu, Jianhua Xu, Hangwei Fu, Bo Zhou, Tao Yuan, Ping Chen
MicroRNAs (miRNAs) play important roles in the regulation of various tumor biological processes including proliferation and apoptosis. MiR-377 has been implicated in many types of cancer, whereas its expressional feature and potential biological function in pancreatic ductal adenocarcinoma (PDAC) remains unclear. In this study, we scanned the global miRNA expression profiles in PDAC from The Cancer Genome Atlas (TCGA) and found miR-377 was down-regulated significantly in PDAC. Then, its expression was measured in both pancreatic cancer tissues and cells; the data showed that miR-377 was de-regulated and inversely correlated with pathologic parameters of tumor growth or metastasis...
September 16, 2016: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
Hye-In Yoo, Bong-Kyu Kim, Sungjoo Kim Yoon
Colorectal cancer (CRC), one of the most prevalent malignant cancers, has high rates pf incidence and is the fourth leading cause of cancer-related deaths for both men and women worldwide. MicroRNAs (miRNAs) play critical roles in the development of various types of cancers. miRNA‑330-5p has been implicated in the progression of prostate, neuronal and pancreatic cancers by regulating proliferation, migration, invasion and epithelial-mesenchymal transition of cells. The purpose of the present study was to investigate the expression of miR-330-5p in CRC and identify its target gene(s) that may act in CRC tumorigenesis...
September 15, 2016: Oncology Reports
Elena Mogilyansky, Peter Clark, Kevin Quann, Honglei Zhou, Eric Londin, Yi Jing, Isidore Rigoutsos
Breast cancer type 2, early onset susceptibility gene (BRCA2) is a major component of the homologous recombination DNA repair pathway. It acts as a tumor suppressor whose function is often lost in cancers. Patients with specific mutations in the BRCA2 gene often display discrete clinical, histopathological, and molecular features. However, a subset of sporadic cancers has wild type BRCA2 and display defects in the homology-directed repair pathway, which is the hallmark of 'BRCAness.' The mechanisms by which BRCAness arises are not well understood but post-transcriptional regulation of BRCA2 gene expression by microRNAs (miRNAs) may contribute to this phenotype...
2016: Frontiers in Genetics
Ryoichi Tanaka, Mitsuhiro Tomosugi, Toshiyuki Sakai, Yoshihiro Sowa
BACKGROUND: MicroRNAs (miRNAs) are small non-coding RNAs, and the deregulated expression of miRNAs is associated with tumor development. Among these, the miR-17-92 cluster, including six mature miRNAs, is known as an oncogenic miRNA cluster because expression of the miR-17-92 cluster is frequently elevated in a variety of malignant tumors. MATERIALS AND METHODS: We investigated whether a mitogen-activated protein kinase kinase (MEK) inhibitor, PD0325901, suppresses expression of the miR-17-92 cluster in HT-29 human colon cancer cells and MIA PaCa-2 pancreatic cancer cells...
September 2016: Anticancer Research
Yilong Li, Yongwei Wang, Rui Kong, Dongbo Xue, Shangha Pan, Hua Chen, Bei Sun
Despite improvements in surgical procedures and chemotherapy, pancreatic cancer remains one of the most aggressive and fatal human malignancies, with a low 5-year survival rate of only 8%. Therefore, novel strategies for prevention and treatment are urgently needed. Here, we investigated the mechanisms underlying the anti-pancreatic cancer effects dihydroartemisinin (DHA). Microarray and systematic analysis showed that DHA suppressed proliferation, inhibited angiogenesis and promoted apoptosis in two different human pancreatic cancer cell lines, and that 5 DHA-regulated microRNAs and 11 of their target mRNAs were involved in these effects via 19 microRNA-mRNA interactions...
August 23, 2016: Oncotarget
Yuan Yu, Lei Liu, Ruirui Ma, Haibing Gong, Ping Xu, Congjun Wang
Pancreatic carcinoma is one of the most malignant human cancers. In this study, we intended to explore the molecular functional of microRNA-127 (miR-127) in regulating pancreatic cancer development both in vitro and in vivo. Quantitative real-time PCR (qRT-PCR) was performed to evaluate endogenous miR-127 expression in in vitro pancreatic cancer cell lines and in vivo clinical samples of pancreatic carcinoma. Lentiviral technology was applied to overexpress miR-127 in capan-1 and PANC-1 cells. Pancreatic cancer proliferation, cell-cycle progression, and invasion were assessed in vitro, and capan-1-derived tumorigenicity was evaluated in vivo...
August 29, 2016: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
Xiaomin Zhong, Lan Zheng, Jianfeng Shen, Dongmei Zhang, Minmin Xiong, Youyou Zhang, Xinhong He, Janos L Tanyi, Feng Yang, Kathleen T Montone, Xiaojun Chen, Congjian Xu, Andy P Xiang, Qihong Huang, Xiaowei Xu, Lin Zhang
Oncogenic KRAS contributes to malignant transformation, antiapoptosis, and metastasis in multiple human cancers, such as lung, colon, and pancreatic cancers and melanoma. MicroRNAs (miRNAs) are endogenous 18- to 25-nucleotide noncoding small RNAs that regulate gene expression in a sequence-specific manner via the degradation of target mRNAs or inhibition of protein translation. In the present study, using array-based miRNA profiling in IMR90 and MCF10A cells expressing oncogenic KRAS, we identified that the expression of the microRNA 200 (mir-200) family was suppressed by KRAS activation and that this suppression was mediated by the transcription factors JUN and SP1 in addition to ZEB1...
November 1, 2016: Molecular and Cellular Biology
Safieh Ebrahimi, Faezeh Ghasemi, Seyed Mahdi Hassanian, Soodabeh Shahidsales, Ramin Mardani, Hamed Akbarzade, Seyed Mohammad Reza Parizadeh, Sharareh Gholamin, Anvar Soleimani, Majid Ghayour-Mobarhan, Amir Avan
Pancreatic ductal adenocarcinoma (PDAC) is an aggressive malignancy with a very poor prognosis, and excessive resistance to chemotherapy. MicroRNAs have been shown to play important roles in PDAC oncogenesis as they can act as both oncogenes and tumor suppressor molecules. Altered expression of specific microRNAs in PDAC has diagnostic and prognostic implications. There is growing body of evidence showing the important role of miR-486-5p and miR-938 for discrimination of PDAC patients from healthy subjects and those with chronic pancreatitis...
August 16, 2016: Current Pharmaceutical Design
Clifford C Nwaeburu, Natalie Bauer, Zhefu Zhao, Alia Abukiwan, Jury Gladkich, Axel Benner, Ingrid Herr
Pancreatic Ductal Adenocarcinoma (PDA) is a highly malignant tumor with poor prognosis. MicroRNAs (miRs) may offer novel therapeutic approaches to treatment. The polyphenol quercetin, present in many fruits and vegetables, possesses anti-carcinogenic properties. To unravel the effect of quercetin to miR signaling we performed miR profiling in PDA cells before and after quercetin treatment, followed by biostatistical analysis. miR let-7c was among the top up-regulated candidates after quercetin treatment, as measured by qRT-PCR and confirmed in two established and one primary PDA cell lines...
August 8, 2016: Oncotarget
Hui Feng, Yalei Wang, Jiaojiao Su, Hongwei Liang, Chen-Yu Zhang, Xi Chen, Weiyan Yao
OBJECTIVES: ErbB3 (HER3) has been associated with pancreatic cancer progression, but little is known about its regulatory mechanisms. We investigated whether microRNAs (miRNAs) regulate levels of ErbB3 in pancreatic cancer cells. METHODS: We used bioinformatic analyses to search for miRNAs that can potentially target ERBB3. Furthermore, the biological consequences of the targeting of ERBB3 by miR-148a were examined by cell proliferation and migration assays in vitro...
October 2016: Pancreas
Saini Setua, Sheema Khan, Murali M Yallapu, Stephen W Behrman, Mohammed Sikander, Shabia Shabir Khan, Meena Jaggi, Subhash C Chauhan
INTRODUCTION: The functional significance of lost microRNAs has been reported in several human malignancies, including pancreatic cancer (PC). Our prior work has identified microRNA-145 (miR-145) as a tumor suppressor microRNA (miRNA) in pancreatic cancer. The restoration of miR-145 downregulates a number of oncogenes including mucin MUC13, a transmembrane glycoprotein that is aberrantly expressed in pancreatic cancer, thus efficiently inhibiting tumor growth in mice. However, lack of an effective tumor-specific delivery system remains an unmet clinical challenge for successful translation of microRNAs...
August 9, 2016: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
Qian Dong, Ce Li, Xiaofang Che, Jinglei Qu, Yibo Fan, Xiaohan Li, Yue Li, Qian Wang, Yunpeng Liu, Xianghong Yang, Xiujuan Qu
Growing evidence has revealed that microRNAs could regulate the proliferation of pancreatic ductal adenocarcinoma (PDAC) cells and predict the prognosis of PDAC. Here the comparative microRNA expression profiles of the good and poor prognosis groups were performed by microRNA microarray. MicroRNA-891b (miR-891b) was screened and validated to be a prognostic predictor of PDAC in the initial group and further evaluated to be an independent predictor for the overall survival of resectable PDACs in an independent cohort...
August 2, 2016: Oncotarget
Chiranjib Chakraborty, Kok-Yong Chin, Srijit Das
Over the last few years, microRNAs (miRNA)-controlled cancer stem cells have drawn enormous attention. Cancer stem cells are a small population of tumor cells that possess the stem cell property of self-renewal. Recent data shows that miRNA regulates this small population of stem cells. In the present review, we explained different characteristics of cancer stem cells as well as miRNA regulation of self-renewal and differentiation in cancer stem cells. We also described the migration and tumor formation. Finally, we described the different miRNAs that regulate various types of cancer stem cells, such as prostate cancer stem cells, head and neck cancer stem cells, breast cancer stem cells, colorectal cancer stem cells, lung cancer stem cells, gastric cancer stem cells, pancreatic cancer stem cells, etc...
July 28, 2016: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
Hong-Wei Yang, Guang-Hui Liu, Yu-Qiong Liu, Hong-Chao Zhao, Zhen Yang, Chun-Lin Zhao, Xie-Fu Zhang, Hua Ye
Increasing study reports that Wnt/β-catenin signaling pathway plays an essential role in numerous cancers growth, progression and metastasis. Aberrant miR-940 expression has been studied in gastric and breast cancer. However, the molecular mechanism of miR-940 enhancing proliferation and metastatic ability in human pancreatic carcinoma is far from to know. Real-time PCR was used to quantify miR-940 expression. Luciferase reporter assays here were performed to verify the activity of Wnt/β-catenin signaling pathway and targeting gene relationships, and immunofluorescence assay was applied to observe β-catenin expressed intensity...
July 23, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Hai V Nguyen, Jesse Gore, Xin Zhong, Sudha S Savant, Samantha Deitz-McElyea, C Max Schmidt, Michael G House, Murray Korc
Lymph node involvement in pancreatic adenocarcinoma (PAC) predicts postresection survival, but early lymph node metastasis detection is not easily accomplished. We assessed a panel of microRNAs (miRNAs) in a common hepatic artery lymph node (station 8) that is readily accessible during pancreatoduodenectomy (PD) to determine if increased miRNA levels correlate with postresection recurrence. Station 8 lymph nodes overlying the common hepatic artery collected during PD were assayed for miRNA-10b, miRNA-30c, miRNA-21, and miRNA-155 and cytokeratin-19 (CK19), an epithelial cell marker, using quantitative PCR...
October 2016: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
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