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Pancreatitis AND microRNA

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https://www.readbyqxmd.com/read/29145206/microrna-expression-profiling-of-pancreatic-cancer-cell-line-l3-6p1-following-b7-h4-knockdown
#1
Yun Qian, Limin Feng, Weigen Wu, Tianhao Weng, Chenyu Hu, Bo Hong, Frederick X C Wang, Lingwei Shen, Qi Wang, Xin Jin, Hangping Yao
BACKGROUND/AIMS: Co-stimulating molecule B7-H4 regulates T cell-mediated immune responses, participates in tumor immune escape, and promotes the proliferation and metastasis of pancreatic cancer cells. However, the specific mechanisms are unclear. MicroRNAs (miRNAs) participated in the pathogenesis and progression of cancer. METHODS: In this study, a microarray technique was used to screen B7-H4-related differentially expressed miRNAs in a pancreatic cancer cell line find those associated with pancreatic cancer...
November 17, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29141872/mir-23a-acts-as-an-oncogene-in-pancreatic-carcinoma-by-targeting-foxp2
#2
Hongliang Diao, Zhou Ye, Renyi Qin
MicroRNAs have been reported to play an important role in tumor development and progression by targeting oncogenes and tumor suppressors. miR-23a has been described as significantly upregulated in multiple cancers and involved in tumorigenesis. The aim of this study was to evaluate the potential roles of miR-23a in pancreatic ductal adenocarcinoma (PDAC). We found that miR-23a level was significantly increased in tissues of PDAC compared with that in the control by real-time PCR. FOXP2 expression was downregulated and inversely correlated with miR-23a...
November 14, 2017: Journal of Investigative Medicine: the Official Publication of the American Federation for Clinical Research
https://www.readbyqxmd.com/read/29137308/microrna-23a-promotes-pancreatic-cancer-metastasis-by-targeting-epithelial-splicing-regulator-protein-1
#3
Guo Wu, Zhonghu Li, Peng Jiang, Xi Zhang, Yingqiang Xu, Kai Chen, Xiaowu Li
miR-23a plays vital roles in various cancer metastases. Here, we found that miR-23a expression was significantly up-regulated in pancreatic cancer tissues compared with adjacent normal tissues. miR-23a up-regulation was significantly associated with differentiated degree, lymphoid nodal status, tumor invasion and poor survival rate in pancreatic cancer patients. We also found that miR-23a expression was significantly up-regulated in lymph node metastatic tissues and in pancreatic cancer cells that underwent epithelial-mesenchymal transition (EMT)...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29137251/exportin-1-xpo1-inhibition-leads-to-restoration-of-tumor-suppressor-mir-145-and-consequent-suppression-of-pancreatic-cancer-cell-proliferation-and-migration
#4
Asfar S Azmi, Yiwei Li, Irfana Muqbil, Amro Aboukameel, William Senapedis, Erkan Baloglu, Yosef Landesman, Sharon Shacham, Michael G Kauffman, Philip A Philip, Ramzi M Mohammad
Pancreatic ductal adenocarcinoma (PDAC) is the third leading cause of cancer related deaths in the United States with a majority of these patients dying from aggressively invasive and metastatic disease. There is growing evidence that suggests an important role for microRNAs (miRNAs) in the pathobiology of aggressive PDAC. In this study, we found that the expression of miR-145 was significantly lower in PDAC cells when compared to normal pancreatic duct epithelial cells. Here we show that inhibition of the nuclear exporter protein exportin 1 (XPO1; also known as chromosome maintenance region 1 [CRM1]) by siRNA knockdown or by the Selective Inhibitor of Nuclear Export (SINE) compound (KPT-330; selinexor) increases miR-145 expression in PDAC cells resulting in the decreased cell proliferation and migration capacities...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29130611/usefulness-of-exosome-encapsulated-microrna-451a-as-a-minimally-invasive-biomarker-for-prediction-of-recurrence-and-prognosis-in-pancreatic-ductal-adenocarcinoma
#5
Kunihiko Takahasi, Hisae Iinuma, Keita Wada, Shunryo Minezaki, Sachiyo Kawamura, Masahiko Kainuma, Yutaka Ikede, Makoto Shibuya, Fumihiko Miura, Keiji Sano
BACKGROUND: MicroRNAs (miRNAs) encapsulated in the exosomes of plasma is of interest as stable and minimally invasive biomarkers for recurrence and prognosis in cancer patients. The aim of this study was to clarify the predictive and prognostic value of plasma exosomal microRNA-451a (miR-451a) in patients with pancreatic ductal adenocarcinoma (PDAC). METHODS: Microarray-based expression profiling of miRNAs derived from exosomes in the plasma of 6 PDAC patients with UICC stage II was employed to identify a biomarker to distinguish between patients with and without recurrence...
November 11, 2017: Journal of Hepato-biliary-pancreatic Sciences
https://www.readbyqxmd.com/read/29122960/mir-335-overexpression-impairs-insulin-secretion-through-defective-priming-of-insulin-vesicles
#6
Vishal A Salunkhe, Jones K Ofori, Nikhil R Gandasi, Sofia A Salö, Sofia Hansson, Markus E Andersson, Anna Wendt, Sebastian Barg, Jonathan L S Esguerra, Lena Eliasson
MicroRNAs contribute to the maintenance of optimal cellular functions by fine-tuning protein expression levels. In the pancreatic β-cells, imbalances in the exocytotic machinery components lead to impaired insulin secretion and type 2 diabetes (T2D). We hypothesize that dysregulated miRNA expression exacerbates β-cell dysfunction, and have earlier shown that islets from the diabetic GK-rat model have increased expression of miRNAs, including miR-335-5p (miR-335). Here, we aim to determine the specific role of miR-335 during development of T2D, and the influence of this miRNA on glucose-stimulated insulin secretion and Ca(2+)-dependent exocytosis...
November 2017: Physiological Reports
https://www.readbyqxmd.com/read/29120411/alternative-polyadenylation-of-zeb1-promotes-its-translation-during-genotoxic-stress-in-pancreatic-cancer-cells
#7
Ilaria Passacantilli, Valentina Panzeri, Pamela Bielli, Donatella Farini, Emanuela Pilozzi, Gianfranco Delle Fave, Gabriele Capurso, Claudio Sette
Pancreatic ductal adenocarcinoma (PDAC) is characterized by extremely poor prognosis. The standard chemotherapeutic drug, gemcitabine, does not offer significant improvements for PDAC management due to the rapid acquisition of drug resistance by patients. Recent evidence indicates that epithelial-to-mesenchymal transition (EMT) of PDAC cells is strictly associated to early metastasization and resistance to chemotherapy. However, it is not exactly clear how EMT is related to drug resistance or how chemotherapy influences EMT...
November 9, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/29115476/prognostic-micrornas-and-their-potential-molecular-mechanism-in-pancreatic-cancer-a-study-based-on-the-cancer-genome-atlas-and-bioinformatics-investigation
#8
Liang Liang, Dan-Ming Wei, Jian-Jun Li, Dian-Zhong Luo, Gang Chen, Yi-Wu Dang, Xiao-Yong Cai
Although certain biomarkers that are directly associated with the overall survival (OS) of patients with pancreatic adenocarcinoma (PAAD) have been identified, the efficacy of a single factor is limited to predicting the prognosis. The aim of the present study was to identify a combination micro (mi)RNA signature that enhanced the prognostic prediction for PAAD. Following analysis of the data available from The Cancer Genome Atlas (TCGA), 175 PAAD samples were selected for the present study, and the associations between 494 miRNAs and OS were investigated...
November 3, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29111166/deregulated-expression-of-mir-107-inhibits-metastasis-of-pdac-through-inhibition-pi3k-akt-signaling-via-caveolin-1-and-pten
#9
Junjie Xiong, Dan Wang, Ailin Wei, Huimin Lu, Chunlu Tan, Ang Li, Jie Tang, Yichao Wang, Sirong He, Xubao Liu, Weiming Hu
Pancreatic ductal adenocarcinoma (PDAC) displays a highly aggressive malignancy and is considered to be an incurable and rapidly lethal disease. MicroRNAs (miRNAs) are small non-coding RNAs of approximately nucleotides that regulate several aspects of tumors pathogenesis, including migration, invasion, metastasis and epithelial-mesenchymal transition. We have found that miR-107 was significantly high expression in PDAC tissues and cells. High miR-107 expression is associated with poor clinicopathological parameters and prognosis in PDAC patients...
October 27, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/29105385/punica-granatum-l-fruit-aqueous-extract-suppresses-reactive-oxygen-species-mediated-p53-p65-mir-145-expressions-followed-by-elevated-levels-of-irs-1-in-alloxan-diabetic-rats
#10
Ehsan Gharib, Shideh Montasser Kouhsari, Maryam Izad
OBJECTIVES: Reactive oxygen species (ROS) is an apoptosis inducer in pancreatic β-cells that stimulates p53/p65 mediated microRNA (miR)-145 expression. Punica granatum L. (pomegranate) is an antioxidant fruit that attenuates ROS generation. This study examines the effects of pomegranate fruit aqueous extract (PGE) on the levels of ROS, p53, p65, miR-145, and its target insulin receptor substrate 1 (irs-1) mRNA in Alloxan-diabetic male Wistar rats. MATERIALS AND METHODS: In this experimental study, diabetic rats received different doses of PGE...
January 2018: Cell Journal
https://www.readbyqxmd.com/read/29101219/mir-204-controls-glucagon-like-peptide-1-receptor-expression-and-agonist-function
#11
SeongHo Jo, Junqin Chen, Guanlan Xu, Truman B Grayson, Lance A Thielen, Anath Shalev
Glucagon-like peptide 1 receptor (GLP1R) agonists are widely used to treat diabetes. However, their function is dependent on adequate GLP1R expression, which is downregulated in diabetes. GLP1R is highly expressed on pancreatic beta cells and activation by endogenous incretin or GLP1R agonists increases cAMP generation, which stimulates glucose-induced beta cell insulin secretion and helps maintain glucose homeostasis. We now have discovered that the highly beta cell-enriched microRNA, miR-204, directly targets the 3'UTR of GLP1R and thereby downregulates its expression in the beta-cell-derived rat INS-1 cell line and primary mouse and human islets...
November 3, 2017: Diabetes
https://www.readbyqxmd.com/read/29078789/mir-92b-3p-acts-as-a-tumor-suppressor-by-targeting-gabra3-in-pancreatic-cancer
#12
Manmei Long, Ming Zhan, Sunwang Xu, Ruimeng Yang, Wei Chen, Shilei Zhang, Yongheng Shi, Qiao He, Man Mohan, Qiang Liu, Jian Wang
BACKGROUND: MicroRNAs (miRNAs) can act as oncogenes or tumor suppressors by controlling cell proliferation, differentiation, metastasis and apoptosis, and miRNA dysregulation is involved in the development of pancreatic cancer (PC). Our previous study demonstrated that Gabra3 plays critical roles in cancer progression. However, whether Gabra3 is regulated by miRNAs in PC remains unknown. METHODS: The expression levels of miR-92b-3p and Gabra3 were measured by quantitative PCR (qPCR), immunoblotting, in situ hybridization (ISH) and immunohistochemistry (IHC)...
October 27, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/29069873/prognostic-value-of-microrna-expression-levels-in-pancreatic-adenocarcinoma-a-review-of-the-literature
#13
REVIEW
Patrick Wald, X Shawn Liu, Cory Pettit, Mary Dillhoff, Andrei Manilchuk, Carl Schmidt, Evan Wuthrick, Wei Chen, Terence M Williams
BACKGROUND: Clinical and pathologic markers of prognosis and patterns of failure help guide clinicians in selecting patients for adjuvant therapy after surgical resection for pancreatic adenocarcinoma (PDAC). Recent studies have reported the prognostic utility of microRNA profiling in numerous malignancies. Here, we review and summarize the current literature regarding associations between microRNA expression and overall survival in PDAC patients. MATERIALS AND METHODS: We conducted a systematic search in the PubMed database to identify all primary research studies reporting prognostic associations between tumor and/or serum microRNA expression and overall survival in PDAC patients...
September 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/29063045/kras-related-noncoding-rnas-in-pancreatic-ductal-adenocarcinoma
#14
REVIEW
Shuang-Ni Yu, Yi-Hui Ma, Wu-Gan Zhao, Xiang-Lan Jin, Hai-Yan Yang, Ping-Ping Liu, Jie Chen
Pancreatic ductal adenocarcinoma (PDAC) is a lethal disease with a poor overall prognosis. However, curative resection during the early stages of the disease can greatly improve survival rates, highlighting the importance of early screening and detection. Studies of noncoding RNAs, primarily microRNAs (miRNAs) and long noncoding RNAs (lncRNAs), provide important insights into strategies for the early detection of KRAS-driven PDAC. Here, we summarize our studies and review current reports on research investigating KRAS-related miRNAs and lncRNAs, emphasizing their aberrant expression, mechanisms, carcinogenic effects, and prognostic and predictive capacities in PDAC...
December 2016: Chronic Dis Transl Med
https://www.readbyqxmd.com/read/29054965/adenovirus-mediated-artificial-microrna-targeting-fibrinogen-like-protein-2-attenuates-the-severity-of-acute-pancreatitis-in-mice
#15
Xiaohua Ye, Jin Ding, Yanping Chen, Jiayue Dong
Severe acute pancreatitis (SAP) remains to be challenging for its unpredictable inflammatory progression from acute pancreatitis to SAP. Apoptosis is an important pathology of SAP. Fibrinogen-like protein 2 (FGL2) has been reported to be involved in apoptosis. The present study aimed to explore the therapeutic effect of an adenovirus-mediated artificial microRNA targeting FGL2 (Ad-FGL2-miRNA) in taurocholate-induced murine pancreatitis models. Sodium taurocholate was retrogradely injected into the biliopancreatic ducts of the C57/BL mice to induce SAP...
October 20, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/29050264/the-microrna-expression-signature-of-pancreatic-ductal-adenocarcinoma-by-rna-sequencing-anti-tumour-functions-of-the-microrna-216-cluster
#16
Keiichi Yonemori, Naohiko Seki, Tetsuya Idichi, Hiroshi Kurahara, Yusaku Osako, Keiichi Koshizuka, Takayuki Arai, Atsushi Okato, Yoshiaki Kita, Takaaki Arigami, Yuko Mataki, Yuko Kijima, Kosei Maemura, Shoji Natsugoe
We analysed the RNA sequence-based microRNA (miRNA) signature of pancreatic ductal adenocarcinoma (PDAC). Aberrantly expressed miRNAs were successfully identified in this signature. Using the PDAC signature, we focused on 4 clustered miRNAs, miR-216a-5p, miR-216a-3p, miR-216b-5p and miR-216b-3p on human chromosome 2p16.1. All members of the miR-216 cluster were significantly reduced in PDAC specimens. Ectopic expression of these miRNAs suppressed cancer cell aggressiveness, suggesting miR-216 cluster as anti-tumour miRNAs in PDAC cells...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29048402/mir-3656-expression-enhances-the-chemosensitivity-of-pancreatic-cancer-to-gemcitabine-through-modulation-of-the-rhof-emt-axis
#17
Rui-Meng Yang, Ming Zhan, Sun-Wang Xu, Man-Mei Long, Lin-Hua Yang, Wei Chen, Shuai Huang, Qiang Liu, Jun Zhou, Jun Zhu, Jian Wang
The highly refractory nature of pancreatic cancer (PC) to chemotherapeutic drugs is one of the key reasons contributing to the poor prognosis of this disease. MicroRNAs (miRNAs) are key regulators of gene expression and have been implicated in a variety of processes from cancer development through to drug resistance. Herein, through miRNA profiling of gemcitabine-resistant (GR) and parental PANC-1 cell lines, we found a consistent reduction of miR-3656 in GR PANC-1 cells. miR-3656 overexpression enhanced the antitumor effect of gemcitabine, whereas silencing of miR-3656 resulted in the opposite effect...
October 19, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/29040320/circulating-microrna-375-as-biomarker-of-pancreatic-beta-cell-death-and-protection-of-beta-cell-mass-by-cytoprotective-compounds
#18
Imane Song, Sarah Roels, Geert A Martens, Luc Bouwens
OBJECTIVE: Previous studies demonstrated that circulating microRNA-375 (miR-375) is a suitable plasma biomarker for real-time detection of beta cell death. The present study evaluated the use of this biomarker to assess the beta cytoprotective effect of phenylpropenoic acid glucoside (PPAG), which was previously demonstrated to protect beta cells against various types of injury, and of exendin-4, which is an established antidiabetic drug. METHODS: PPAG or exendin-4 were administered in mice treated with streptozotocin (STZ) to acutely induce beta cell death...
2017: PloS One
https://www.readbyqxmd.com/read/29039566/microrna-217-inhibits-cell-proliferation-invasion-and-migration-by-targeting-tpd52l2-in-human-pancreatic-adenocarcinoma
#19
Qiuyang Chen, Peng Wang, Yue Fu, Xinchun Liu, Wenbin Xu, Jishu Wei, Wentao Gao, Kuirong Jiang, Junli Wu, Yi Miao
MicroRNAs (miRNAs) play important roles in the regulation of various tumor biological processes including proliferation and apoptosis. miR-217 has been implicated in many types of cancer, whereas its expression and potential biological function in human pancreatic adenocarcinoma (HPAC) remain unclear. We aimed to investigate the clinical significance of miR-217 in patients with pancreatic carcinoma and its role and underlying molecular mechanism in HPAC. We collected 15 pairs of pancreatic cancer and normal pancreas tissues to evaluate the expression of miR-217 and tumor protein D52-like 2 (Tpd52l2)...
October 16, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29035444/circulating-micrornas-expressions-as-genetic-biomarkers-in-pancreatic-cancer-patients-continuous-non-invasive-monitoring
#20
REVIEW
Mihai Sandesc, Anca Dinu, Alexandru F Rogobete, Ovidiu H Bedreag, Dorel Sandesc, Marius Papurica, Lavinia M Bratu, Silvius Negoita, Corina Vernic, Sonia E Popovici, Dan Corneci
BACKGROUND: Pancreatic cancer is one of the most important causes of death worldwide. The main cause is late detection. Also, an important factor playing a role in altering the clinical status of these patients is the lack of methods for the evaluation of therapeutic response. A marker that can be useful, both in early diagnosis and in evaluating and monitoring non-invasive treatment response, is analyzing the expression of miRNAs. In this paper, we summarize genetic and epigenetic aspects of miRNAs in pancreatic cancer...
October 1, 2017: Clinical Laboratory
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