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Pancreatitis AND microRNA

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https://www.readbyqxmd.com/read/28438662/never-let-it-go-stopping-key-mechanisms-underlying-metastasis-to-fight-pancreatic-cancer
#1
REVIEW
E Giovannetti, C L van der Borden, A E Frampton, A Ali, O Firuzi, G J Peters
Pancreatic ductal adenocarcinoma (PDAC) is an extremely aggressive neoplasm, predicted to become the second leading cause of cancer-related deaths before 2030. This dismal trend is mainly due to lack of effective treatments against its metastatic behavior. Therefore, a better understanding of the key mechanisms underlying metastasis should provide new opportunities for therapeutic purposes. Genomic analyses revealed that aberrations that fuel PDAC tumorigenesis and progression, such as SMAD4 loss, are also implicated in metastasis...
April 21, 2017: Seminars in Cancer Biology
https://www.readbyqxmd.com/read/28434388/microrna-221-3p-is-up-regulated-and-serves-as-a-potential-biomarker-in-pancreatic-cancer
#2
Feng Li, Jian-Wei Xu, Lei Wang, Han Liu, Ye Yan, San-Yuan Hu
It has been demonstrated that circulating MicroRNAs (miRNAs) could be potential biomarkers for cancer diagnosis and prognosis. For pancreatic cancer (PCa), little is known about miR-221-3p biological function or its prognostic value. In the current study, we profiled miR-221-3p expression in PCa cell lines. Compared with normal pancreases ductal epithelial cells, miR-221-3p is up-regulated in all PCa cell lines analysed. In SW1990 cells, overexpression of miR-221-3p increased cell proliferation and inhibited apoptosis, while inhibition of miR-221-3p decreased cell growth rate and promoted apoptosis...
April 21, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28425921/plasma-micro-rna-alterations-appear-late-in-pancreatic-cancer
#3
Oskar Franklin, Pär Jonsson, Ola Billing, Erik Lundberg, Daniel Öhlund, Hanna Nyström, Christina Lundin, Henrik Antti, Malin Sund
OBJECTIVES: The aim of this research was to study whether plasma microRNAs (miRNA) can be used for early detection of pancreatic cancer (PC) by analyzing prediagnostic plasma samples collected before a PC diagnosis. BACKGROUND: PC has a poor prognosis due to late presenting symptoms and early metastasis. Circulating miRNAs are altered in PC at diagnosis but have not been evaluated in a prediagnostic setting. METHODS: We first performed an initial screen using a panel of 372 miRNAs in a retrospective case-control cohort that included early-stage PC patients and healthy controls...
January 3, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28418924/rna-sequencing-analyses-reveal-novel-differentially-expressed-genes-and-pathways-in-pancreatic-cancer
#4
Yixiang Mao, Jianjun Shen, Yue Lu, Kevin Lin, Huamin Wang, Yanan Li, Ping Chang, Mary G Walker, Donghui Li
Gene expression microarrays have identified many tumor markers and therapeutic targets for pancreatic ductal adenocarcinoma (PDAC). However, microarray profilings have limited sensitivity and are prone to cross-hybridization between homologous DNA fragments. Here, we perform a transcriptome analysis of paired tumor and adjacent benign pancreatic tissues from 10 patients who underwent resection for PDAC. We identify a total of 2736 differentially expressed genes (DEGs) with false discovery rate less than 0.05, including 1554 upregulated, 1182 downregulated, and 6 microRNAs (miR-614, miR-217, miR-27b, miR-4451, miR-3609, and miR-612)...
March 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28415794/micrornas-of-the-mir-17-92-cluster-regulate-multiple-aspects-of-pancreatic-tumor-development-and-progression
#5
Brian Quattrochi, Anushree Gulvady, David R Driscoll, Makoto Sano, David S Klimstra, Christopher E Turner, Brian C Lewis
Pancreatic ductal adenocarcinoma (PDAC) is a lethal malignancy characterized by resistance to currently employed chemotherapeutic approaches. Members of the mir-17~92 cluster of microRNAs (miRNAs) are upregulated in PDAC, but the precise roles of these miRNAs in PDAC are unknown. Using genetically engineered mouse models, we show that loss of mir-17~92 reduces ERK pathway activation downstream of mutant KRAS and promotes the regression of KRASG12D-driven precursor pancreatic intraepithelial neoplasias (PanINs) and their replacement by normal exocrine tissue...
March 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28415631/lncrna-hotair-acts-a-competing-endogenous-rna-to-control-the-expression-of-notch3-via-sponging-mir-613-in-pancreatic-cancer
#6
Huihua Cai, Jie Yao, Yong An, Xuemin Chen, Weibo Chen, Di Wu, Boyang Luo, Yong Yang, Yong Jiang, Donglin Sun, Xiaozhou He
Pancreatic cancer is one of the most deadly cancers with a poor prognosis. Though studies have implicated the roles of microRNAs in pancreatic cancer progression, little is known about the role of miR-613 in pancreatic cancer. In the present study, the expression of miR-613 was down-regulated in pancreatic cancer tissues and cancer cell lines. Down-regulation of miR-613 was positively correlated with tumor differentiation, advanced TNM stage, nodal metastasis and shorter overall survival in patients with pancreatic cancer...
March 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28397402/micrornas-can-effectively-induce-formation-of-insulin-producing-cells-from-mesenchymal-stem-cells
#7
Chunyu Bai, Yuhua Gao, Xiangchen Li, Kunfu Wang, Hui Xiong, Zhiqiang Shan, Ping Zhang, Wenjie Wang, Weijun Guan, Yuehui Ma
MicroRNAs regulate insulin secretion, pancreatic development and beta cell differentiation. However, the function of microRNAs in the formation of insulin-producing cells (IPCs) from adult stem cells is poorly understood. We examine the microRNA expression profile in nestin-positive umbilical cord-derived mesenchymal stem cells (N-UCMSCs) and nestin-positive pancreatic mesenchymal stem cells using a deep sequencing approach. We also selected specific microRNAs for overexpression in N-UCMSCs and found that miR-375 and miR-26a induced IPCs differentiation from N-UCMSCs by downregulating target genes including mtpn, sox6, bhlhe22 and ccnd1...
April 10, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28389707/the-race-of-10-synthetic-rnai-based-drugs-to-the-pharmaceutical-market
#8
REVIEW
Ricardo Titze-de-Almeida, Catherine David, Simoneide Souza Titze-de-Almeida
Ten years after Fire and Melo's Nobel Prize for discovery of gene silencing by double-stranded RNA, a remarkable progress was achieved in RNA interference (RNAi). Changes in the chemical structure of synthetic oligonucleotides make them more stable and specific, and new delivery strategies became progressively available. The attention of pharmaceutical industry rapidly turned to RNAi, as an opportunity to explore new drug targets. This review addresses nine small-interfering RNAs (siRNAs) and one unique microRNA (miRNA) inhibitor, which entered the phase 2-3 clinical trials...
April 7, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28382422/the-role-of-exosomes-in-pancreatic-cancer-microenvironment
#9
Avner Friedman, Wenrui Hao
Exosomes are nanovesicles shed by cells as a means of communication with other cells. Exosomes contain mRNAs, microRNAs (miRs) and functional proteins. In the present paper, we develop a mathematical model of tumor-immune interaction by means of exosomes shed by pancreatic cancer cells and dendritic cells. Cancer cells' exosomes contain miRs that promote their proliferation and that inhibit immune response by dendritic cells, and by CD4+ and CD8+ T cells. Dendritic cells release exosomes with proteins that induce apoptosis of cancer cells and that block regulatory T cells...
April 5, 2017: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/28381166/downregulation-of-microrna-181d-had-suppressive-effect-on-pancreatic-cancer-development-through-inverse-regulation-of-knain2
#10
Guopeng Zhang, Dongbo Liu, Guoxian Long, Lei Shi, Hong Qiu, Guangyuan Hu, Guoqing Hu, Shunfang Liu
We explored the expression and function of miR-181d (microRNA-181d) in human pancreatic cancer. Quantitative real-time polymerase chain reaction was used to probe miR-181d expression in both pancreatic cancer cell lines and human pancreatic carcinoma. Pancreatic cancer cell lines, PANC-1 and AsPC-1 cells, were engineered to stably downregulate endogenous miR-181d through lentiviral transduction. The mechanistic effects of miR-181d downregulation on pancreatic cancer development were tested by proliferation, migration, fluorouracil chemosensitivity assays in vitro, and explant assay in vivo...
April 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28377226/aquaporin-3-facilitates-tumor-growth-in-pancreatic-cancer-by-modulating-mtor-signaling
#11
Xunwei Huang, Li Huang, Minhua Shao
Aquaporins (AQP) have been demonstrated to be dysregulated in many human cancers and is thought to be involved in pancreatic carcinogenesis and progression. However, the oncogenic roles and underlying mechanism of AQP in pancreatic ductal adenocarcinoma (PDAC) remain largely unknown. In this study, by data mining of TCGA dataset and CCLE database, we identified that AQP3 is the major AQP expressed in PDAC. Then, the microRNA-874, was demonstrated to be a key regulator of AQP3 expression in PDAC cells. Genetic silencing of AQP3 expression had pronounced effects on cell proliferation and apoptosis of the PDAC cell lines BXPC3 and HPAFII...
May 13, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28373667/bone-marrow-derived-mesenchymal-stem-cells-bmscs-repair-acute-necrotized-pancreatitis-by-secreting-microrna-9-to-target-the-nf-%C3%AE%C2%BAb1-p50-gene-in-rats
#12
Daohai Qian, Ge Wei, Chenglei Xu, Zhigang He, Jie Hua, Jian Li, Qili Hu, Shengping Lin, Jian Gong, Hongbo Meng, Bo Zhou, Hongfei Teng, Zhenshun Song
Acute pancreatitis (AP) is a common acute abdominal disease, 10-20% of which can evolve into severe AP (SAP) causing significant morbidity and mortality. Bone marrow-derived mesenchymal stem cells (BMSCs) have the potential of repairing SAP, but the detailed mechanism remains unknown. We demonstrate here that microRNA-9 (miR-9) modified BMSCs (pri-miR-9-BMSCs) can significantly reduce the pancreatic edema, infiltration, hemorrhage, necrosis, the release of amylase and lipase. Meanwhile, decreased local/systemic inflammatory response (TNF-α↓, IL-1β↓, IL-6↓, HMGB1↓, MPO↓, CD68↓, IL-4↑, IL-10↑, and TGF-β↑) and enhanced regeneration of damaged pancreas (Reg4↑, PTF1↑, and PDX1↑) are also promoted...
April 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28351024/evaluating-the-prognostic-value-of-microrna-203-in-solid-tumors-based-on-a-meta-analysis-and-the-cancer-genome-atlas-tcga-datasets
#13
Yingjie Shao, Wendong Gu, Zhonghua Ning, Xing Song, Honglei Pei, Jingting Jiang
BACKGROUND: It has been reported that miR-203 expression was aberrant in various types of cancers, and it could be used as a prognostic biomarker. Therefore, in this study, we aimed to evaluate the prognostic value of miR-203 expression in solid tumors by using meta-analysis and The Cancer Genome Atlas (TCGA) datasets. METHODS: By doing a literature research in PubMed, Embase and the Cochrane Library (last update by December 2016), we were able to identify the studies assessing the prognostic role of miR-203 in various tumors...
March 24, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28346520/downregulation-of-mir-139-5p-contributes-to-the-antiapoptotic-effect-of-liraglutide-on-the-diabetic-rat-pancreas-and-ins-1-cells-by-targeting-irs1
#14
Jin Li, Lei Su, Ying-Ying Gong, Mei-Lin Ding, Shu-Bin Hong, Shuang Yu, Hai-Peng Xiao
Liraglutide is administered as glucagon-like peptide-1 (GLP-1) receptor agonist for diabetic patients and can protect pancreatic β-cells by inhibiting their apoptosis. MicroRNA-139-5p (miRNA-139-5p) participates in the regulation of cancer cell apoptosis. However, it is not clear whether miR-139-5p contributes to the anti-apoptotic effect of liraglutide in β-cells. The objective of the present study was to investigate the role of miR-139-5p on apoptosis of pancreatic β-cells. MicroRNA levels in pancreatic tissue from diabetic rats and INS-1 cells treated with liraglutide were measured by real-time quantitative RT-PCR...
2017: PloS One
https://www.readbyqxmd.com/read/28343174/mirna-analysis-in-pancreatic-cancer-the-dartmouth-experience
#15
REVIEW
Francine B de Abreu, Xiaoying Liu, Gregory J Tsongalis
Pancreatic cancer is considered one of the most lethal cancers being the fourth leading cause of cancer deaths in adults in the United States because of the lack of early signs and symptoms and the lack of early detection. Pancreatic ductal adenocarcinoma (PDAC) is the most common histological type among pancreatic cancers, representing 80%-90% of all solid tumors of the pancreas. The majority of PDAC develops from three precursor lesions: pancreatic intraepithelial neoplasia, intraductual papillary mucinous neoplasm and mucinous cystic neoplasm...
May 1, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28338957/regulation-of-tgf-%C3%AE-mediated-endothelial-mesenchymal-transition-by-microrna-27
#16
Hiroshi I Suzuki, Akihiro Katsura, Hajime Mihira, Masafumi Horie, Akira Saito, Kohei Miyazono
Multiple microRNAs (miRNAs) regulate epithelial-mesenchymal transition and endothelial-mesenchymal transition (EndMT). Here we report that microRNA-27b (miR-27b) positively regulates transforming growth factor-β (TGF-β)-induced EndMT of MS-1 mouse pancreatic microvascular endothelial cells. TGF-β induced miR-23b/24-1/27b expression, and inhibition of miR-27 suppressed TGF-β-mediated induction of mesenchymal genes. Genome-wide miRNA target analysis revealed that miR-27 targets Elk1, which acts as a competitive inhibitor of myocardin-related transcription factor-serum response factor signalling and as a myogenic repressor...
March 13, 2017: Journal of Biochemistry
https://www.readbyqxmd.com/read/28338182/microrna-199a-5p-mediates-high-glucose-induced-reactive-oxygen-species-production-and-apoptosis-in-ins-1-pancreatic-%C3%AE-cells-by-targeting-sirt1
#17
N Lin, X-Y Li, H-M Zhang, Z Yang, Q Su
OBJECTIVE: Hyperglycemia-induced pancreatic β-cell loss is a pathologic hallmark of type 2 diabetes mellitus (T2DM). This study was conducted to clarify the function of microRNA (miR)-199a-5p in high glucose-elicited β-cell toxicity and associated molecular mechanisms. MATERIALS AND METHODS: INS-1 rat pancreatic β-cells were cultured under normal (11 mM) or high (30 mM) glucose for 16-72 h and examined for miR-199a-5p expression. Gain and loss-of-function studies were performed to determine the role of miR-199a-5p in high glucose-induced apoptosis and reactive oxygen species (ROS) production...
March 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28338171/-advances-of-circulating-biomarkers-in-gastroenteropancreatic-neuroendocrine-neoplasms
#18
Luohai Chen, Minhu Chen, Jie Chen
Gastroenteropancreatic neuroendocrine neoplam (GEP-NEN) is a rare group of tumors with its incidence rising significantly in recent decades. Because of the late presentation of the disease and limitations in conventional biomarkers, about 50% of GEP-NEN patients manifests advanced disease when diagnosed. Therefore, it is vital to identify circulating biomarkers which can not only be used for early diagnosis but also accurately evaluating the biological behavior of GEP-NEN. This review summarizes the advances of circulating biomarkers in diagnosing and evaluating efficacy of treatment in GEP-NEN...
March 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28332581/elevated-mir-130a-mir130b-mir-152-expression-reduces-intracellular-atp-levels-in-the-pancreatic-beta-cell
#19
Jones K Ofori, Vishal A Salunkhe, Annika Bagge, Neelanjan Vishnu, Mototsugu Nagao, Hindrik Mulder, Claes B Wollheim, Lena Eliasson, Jonathan L S Esguerra
MicroRNAs have emerged as important players of gene regulation with significant impact in diverse disease processes. In type-2 diabetes, in which impaired insulin secretion is a major factor in disease progression, dysregulated microRNA expression in the insulin-secreting pancreatic beta cell has been widely-implicated. Here, we show that miR-130a-3p, miR-130b-3p, and miR-152-3p levels are elevated in the pancreatic islets of hyperglycaemic donors, corroborating previous findings about their upregulation in the islets of type-2 diabetes model Goto-Kakizaki rats...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28321160/mir-1181-inhibits-invasion-and-proliferation-via-stat3-in-pancreatic-cancer
#20
Jie Wang, Xing-Jun Guo, You-Ming Ding, Jian-Xin Jiang
AIM: To examine the role of microRNA 1181 (miR-1181) in invasion and proliferation in pancreatic cancer. METHODS: We analyzed the expression of miR-1181 in several pancreatic cancer cell lines and generated stable MIA-PaCa-2 and PANC-1 cell lines with up-regulated miR-1181 expression using an adenovirus delivery system. We then investigated miR-1181's effect on invasion and proliferation of pancreatic cancer cells by transwell assay, wound healing assay, cell counting kit-8 assay and colony-forming assay, and explored any underlying mechanisms by western bolt...
March 7, 2017: World Journal of Gastroenterology: WJG
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