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Pancreatitis AND microRNA

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https://www.readbyqxmd.com/read/28928875/microrna-216b-5p-functions-as-a-tumor-suppressive-rna-by-targeting-tpt1-in-pancreatic-cancer-cells
#1
Yu You, Jiaxin Tan, Yi Gong, Haisu Dai, Haowei Chen, Xuejun Xu, Aigang Yang, Yujun Zhang, Ping Bie
MicroRNAs (miRNAs) are increasingly recognized as being involved in pancreatic cancer progression by directly regulating the expression of their targets. In this study, we showed that miR-216b-5p expression was significantly decreased in pancreatic cancer tissues and cell lines. In addition, low miR-216b-5p expression was significantly associated with large tumor size and advanced TNM stage. Meanwhile, both Kaplan-Meier and multivariate survival analysis showed that decreased miR-216b-5p expression was associated with overall survival...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28927071/microrna-452-suppresses-pancreatic-cancer-migration-and-invasion-by-directly-targeting-b-cell-specific-moloney-murine-leukemia-virus-insertion-site-1
#2
Hongyan Li, Yan Wu, Peixiu Li
Pancreatic cancer, one of the most common cancers globally, is the fourth most common cause of cancer-associated mortality in the USA. The 5-year relative survival rate for patients with pancreatic cancer is ~5% and the median survival time is only 6 months. The poor prognosis is mainly due to early and aggressive local invasion and metastasis, as well as dissemination of the pancreatic cancer cells. The present study demonstrated that microRNA-452 (miR-452) was markedly downregulated in pancreatic cancer tissues, particularly in metastatic tumors and pancreatic cancer cell lines...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28904340/microrna-196b-inhibits-late-apoptosis-of-pancreatic-cancer-cells-by-targeting-cadm1
#3
Hong-Ling Wang, Rui Zhou, Jing Liu, Ying Chang, Shi Liu, Xiao-Bing Wang, Mei-Fang Huang, Qiu Zhao
Pancreatic cancer (PC), as the leading cause of cancer death worldwide, is one of the deadliest tumors with a very low 5-year survival rate. Therefore, it is urgent to seek new biomarkers of PC for more accurate and reliable treatments. To identify the differentially expressed miRNAs (DEM) in PC tissues, we performed the systematic microarray and qRT-PCR analyses. We found miR-196b was the top dysregulated DEM in PC tissues as compared with the corresponding adjacent tissues, and positively correlated with poor differentiation, tumor size, lymphatic invasion and TNM stage...
September 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28903323/the-pancreatic-tumor-microenvironment-drives-changes-in-mirna-expression-that-promote-cytokine-production-and-inhibit-migration-by-the-tumor-associated-stroma
#4
Song Han, David H Gonzalo, Michael Feely, Daniel Delitto, Kevin E Behrns, Mark Beveridge, DongYu Zhang, Ryan Thomas, Jose G Trevino, Thomas D Schmittgen, Steven J Hughes
The pancreatic adenocarcinoma (PDAC) microenvironment is largely comprised of fibrotic tumor associated stroma (TAS) that contributes to the lethal biology of PDAC. microRNA (miRNA) are small non-coding RNAs that regulate gene expression. We hypothesized that interactions between PDAC cells and TAS cells within the microenvironment modulate miRNA expression and thus, tumor biology. We observed that miR-205 and members of the miR-200 family (miR-200a, -200b, -200c, -141 and miR-429) were exclusively expressed in PDAC cells, consistent with an epithelial miRNA signature, while miR-145 and miR-199 family members (miR-199a and -199b) were solely expressed in TAS cells, consistent with a stromal miRNA signature...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28887583/mir-608-regulating-the-expression-of-ribonucleotide-reductase-m1-and-cytidine-deaminase-is-repressed-through-induced-gemcitabine-chemoresistance-in-pancreatic-cancer-cells
#5
Azam Rajabpour, Ali Afgar, Habibollah Mahmoodzadeh, Jalal-E-Din Radfar, Farzad Rajaei, Ladan Teimoori-Toolabi
PURPOSE: Gemcitabine resistance is the main problem in pancreatic adenocarcinoma patients. Hence, we aimed to identify the correlation between expression of RRM1 and CDA as the resistance genes and their predicted targeting miR-608 in the resistant pancreatic cancer cell lines to gemcitabine. METHODS: Dual luciferase assay was performed to determine whether both RRM1 and CDA are targeted by miR-608 in 293T and pancreatic cancer cell lines. AsPC-1 and MIA PaCa-2 cell lines became gradually resistant to gemcitabine by exposing to the increasing doses of gemcitabine...
September 8, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28881803/regulation-of-actin-binding-protein-anln-by-antitumor-mir-217-inhibits-cancer-cell-aggressiveness-in-pancreatic-ductal-adenocarcinoma
#6
Tetsuya Idichi, Naohiko Seki, Hiroshi Kurahara, Keiichi Yonemori, Yusaku Osako, Takayuki Arai, Atsushi Okato, Yoshiaki Kita, Takaaki Arigami, Yuko Mataki, Yuko Kijima, Kosei Maemura, Shoji Natsugoe
Analysis of our microRNA (miRNA) expression signature of pancreatic ductal adenocarcinoma (PDAC) revealed that microRNA-217 (miR-217) was significantly reduced in cancer tissues. The aim of this study was to investigate the antitumor roles of miR-217 in PDAC cells and to identify miR-217-mediated molecular pathways involved in PDAC aggressiveness. The expression levels of miR-217 were significantly reduced in PDAC clinical specimens. Ectopic expression of miR-217 significantly suppressed cancer cell migration and invasion...
August 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28875433/crucial-micrornas-and-genes-in-metformin-s-anti-pancreatic-cancer-effect-explored-by-microrna-mrna-integrated-analysis
#7
Yilong Li, Le Li, Guangquan Zhang, Yongwei Wang, Hua Chen, Rui Kong, Shangha Pan, Bei Sun
Despite great 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. Therefore, novel therapeutic strategies for the prevention and treatment of pancreatic cancer are urgently needed. The present study aimed to investigate the mechanisms by which metformin exerts its anticancer effects on the microRNA-mRNA interactions in human pancreatic cancer. Microarray and systematic analyses revealed that the anti-pancreatic cancer effects of metformin were correlated with 3 up-regulated microRNAs and 4 of their target mRNAs...
September 5, 2017: Investigational New Drugs
https://www.readbyqxmd.com/read/28822990/%C3%AE-%C3%AE-mangostins-induces-autophagy-and-shows-synergistic-effectwith-gemcitabine-in-pancreatic-cancer-cell-lines
#8
Myoungjae Kim, Young-Won Chin, Eun Joo Lee
Pancreatic cancer is one of the most lethal and aggressive cancers in the world. However, no effective treatment is currently available for pancreatic cancer. The objective of this study was to determine the anti-pancreatic cancer effect of α-mangostin (αM) and γ-mangostin (γM) extracted from the pericarp of Garcinia mangostana L.. Both αM and γM reduced the viability of pancreatic cancer cells MIA PaCa-2 and PANC-1 in a dose-dependent manner. These compounds induced apoptosis by increasing c-PARP and c-Caspase 3 levels...
August 21, 2017: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/28813430/reprogramming-human-gallbladder-cells-into-insulin-producing-%C3%AE-like-cells
#9
Feorillo Galivo, Eric Benedetti, Yuhan Wang, Carl Pelz, Jonathan Schug, Klaus H Kaestner, Markus Grompe
The gallbladder and cystic duct (GBCs) are parts of the extrahepatic biliary tree and share a common developmental origin with the ventral pancreas. Here, we report on the very first genetic reprogramming of patient-derived human GBCs to β-like cells for potential autologous cell replacement therapy for type 1 diabetes. We developed a robust method for large-scale expansion of human GBCs ex vivo. GBCs were reprogrammed into insulin-producing pancreatic β-like cells by a combined adenoviral-mediated expression of hallmark pancreatic endocrine transcription factors PDX1, MAFA, NEUROG3, and PAX6 and differentiation culture in vitro...
2017: PloS One
https://www.readbyqxmd.com/read/28782557/yb-1-expression-promotes-pancreatic-cancer-metastasis-that-is-inhibited-by-microrna-216a
#10
Jingjing Lu, Xiaohong Li, Fei Wang, Yibing Guo, Yan Huang, Hui Zhu, Yao Wang, Yuhua Lu, Zhiwei Wang
Pancreatic cancer is one of the most aggressive cancers. The vast majority of patients are diagnosed with advanced, unresectable disease because of early invasive growth and metastatic spread. The aim of this study was to examine YB-1 expression in pancreatic cancer and determine its effects on cell invasion. YB-1 is overexpressed in pancreatic cancer cell lines and patient tissue samples. In patient tissues, high YB-1 levels correlated with perineural invasion. Silencing of YB-1 significantly reduced cell invasion with decreased expression of MMPs in vitro...
August 3, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28761107/regulatory-t-cells-from-pancreatic-lymphnodes-of-patients-with-type-1-diabetes-express-increased-levels-of-microrna-mir-125a-5p-that-limits-ccr2-expression
#11
Guido Sebastiani, Giuliana Ventriglia, Angela Stabilini, Carlo Socci, Cristina Morsiani, Andrea Laurenzi, Laura Nigi, Caterina Formichi, Bechara Mfarrej, Alessandra Petrelli, Georgia Fousteri, Todd M Brusko, Francesco Dotta, Manuela Battaglia
Autoimmune type 1 diabetes (T1D) is thought to be caused by a defective immune regulation with regulatory T (Treg) cells playing a fundamental role in this process. Tolerance mechanisms depend on tunable responses that are sensitive to minor perturbations in the expression of molecules that can be carried out by multiple epigenetic mechanisms, including regulation by microRNAs. In this study, microRNA expression profile was investigated in Treg cells isolated from peripheral blood (PB) and from pancreatic draining lymph nodes (PLN) of T1D patients and non-diabetic subjects...
July 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28759959/low-serum-mir-373-predicts-poor-prognosis-in-patients-with-pancreatic-cancer
#12
Yongqiang Hua, Hao Chen, Libing Wang, Feng Wang, Peng Wang, Zhouyu Ning, Ye Li, Luming Liu, Zhen Chen, Zhiqiang Meng
BACKGROUND: Circulating microRNAs (miRNAs) are emerging as novel biomarkers for various types of cancer including pancreatic cancer (PC). OBJECTIVE: We aimed to explore the diagnostic and prognostic significance of serum miR-373 in PC. METHODS: In the current study, we recruited a total of 103 PC patients, 30 patients with benign pancreatic tumor, 20 patients with chronic pancreatitis and 50 healthy volunteers. Total RNA was isolated from all the blood samples, and relative miR-373 expression levels were detected by reverse transcription-quantitative polymerase chain reaction (RT-qPCR)...
July 19, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/28753564/exportin-1-xpo1-inhibition-leads-to-restoration-of-tumor-suppressor-mir-145-and-consequent-suppression-of-pancreatic-cancer-cell-proliferation-and-migration
#13
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...
July 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/28749040/retraction-microrna-4656-is-a-prognostic-factor-and-tumor-suppressor-in-human-pancreatic-cancer-through-a-downstream-target-of-trka-by-xianglong-tan-jinyong-lv-guodong-zhao-zhiming-zhao-chenggang-li-yong-xu-and-minggen-hu
#14
https://www.readbyqxmd.com/read/28747214/culturing-and-transcriptome-profiling-of-progenitor-like-colonies-derived-from-adult-mouse-pancreas
#15
Dongshen Ma, Shanshan Tang, Jing Song, Qiong Wu, Fangfang Zhang, Yun Xing, Yi Pan, Yanfeng Zhang, Jingwei Jiang, Yubin Zhang, Liang Jin
BACKGROUND: Transplantation of insulin-producing cells is considered an important diabetes therapy. Many research studies have shown that insulin-producing cells can be derived from the in-vitro cultured pancreatic colonies with self-renewal ability and multilineage potential. Even though these progenitor-like colonies have been prepared from adult pancreas cells, the efficient culture method is hardly established and regulation of the colonies is rarely known. We confirmed previously that single cells acquired from adult mouse pancreas could form cyst-like colonies in a 3D semi-solid system containing Matrigel and methylcellulose...
July 26, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28721656/circrna-a-novel-type-of-biomarker-for-cancer
#16
REVIEW
He-da Zhang, Lin-Hong Jiang, Da-Wei Sun, Jun-Chen Hou, Zhen-Ling Ji
Circular RNAs (circRNAs) are a class of long, non-coding RNAs molecules that shape a covalently closed continuous loop which have no 5'-3' polarity and contain no polyA tail. CircRNAs also possess relatively jarless framework and are highly tissue-specific expressed in the eukaryotic transcriptome. Emerging evidences have discovered that thousands of endogenous circRNAs are present in mammalian cells and they mediate gene expression at the transcriptional or post-transcriptional level by binding to microRNAs or other molecules and then inhibit their function...
July 18, 2017: Breast Cancer: the Journal of the Japanese Breast Cancer Society
https://www.readbyqxmd.com/read/28721157/micrornas-and-metabolic-disorders-where-are-we-heading
#17
Agnieszka Sliwinska, Marta A Kasinska, Jozef Drzewoski
MicroRNAs (miRNAs, miRs) are short, non-coding molecules engaged in normal functioning of eukaryotic cells, as negative regulators of gene expression. Since the first discovery of miRNA in the early 1990s, hundreds of different miRNAs and their targets have been identified. A growing number of studies have aimed to search for microRNAs which have a key role in the regulation of insulin signaling and metabolic homeostasis. Recent evidence indicates that dysregulation of miRNA expression is involved in the development of various diseases, including type 2 diabetes mellitus (T2DM), obesity and cardiovascular diseases...
June 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28720759/depleted-tumor-suppressor-mir-107-in-plasma-relates-to-tumor-progression-and-is-a-novel-therapeutic-target-in-pancreatic-cancer
#18
Taisuke Imamura, Shuhei Komatsu, Daisuke Ichikawa, Mahito Miyamae, Wataru Okajima, Takuma Ohashi, Jun Kiuchi, Keiji Nishibeppu, Hirotaka Konishi, Atsushi Shiozaki, Ryo Morimura, Hisashi Ikoma, Toshiya Ochiai, Kazuma Okamoto, Hiroki Taniguchi, Eigo Otsuji
This study explored decreased tumor suppressor microRNA (miRNA) plasma levels in pancreatic cancer (PCa) patients to clarify their potential as novel biomarkers and therapeutic targets. We used the microRNA array-based approach to select candidates by comparing plasma levels between PCa patients and healthy volunteers. Six down-regulated miRNAs (miR-107, miR-126, miR-451, miR-145, miR-491-5p, and miR-146b-5p) were selected. Small- and large-scale analyses using samples from 100 PCa patients and 80 healthy volunteers revealed that miR-107 was the most down-regulated miRNA in PCa patients compared with healthy volunteers (P < 0...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28713945/mir%C3%A2-433-protects-pancreatic-%C3%AE-cell-growth-in-high%C3%A2-glucose-conditions
#19
Min Wang
Pancreatic β cell dysfunction is a key characteristic in the pathogenesis of diabetes mellitus (DM). MicroRNAs (miRNAs) have been identified to serve a role in DM pathogenesis, but how specific miRNAs regulate glucose‑stimulated β cell functions remain unclear. The present study aimed to explore the effects of miR‑433 on cell growth under high‑glucose culture conditions and to determine the possible mechanisms involved. Reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR) analysis was performed to detect the expression levels of miRNAs in Min‑6 pancreatic β cells cultured in high‑glucose medium, which revealed that miR‑433 was significantly downregulated...
September 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28710412/exosomes-derived-from-pancreatic-cancer-cells-induce-insulin-resistance-in-c2c12-myotube-cells-through-the-pi3k-akt-foxo1-pathway
#20
Lantian Wang, Bo Zhang, Wen Zheng, Muxing Kang, Qing Chen, Wenjie Qin, Chao Li, Yuefeng Zhang, Yingkuan Shao, Yulian Wu
Prospective epidemiological studies have consistently suggested that pancreatic cancer-associated new-onset diabetes mellitus (PC-DM) represents a potential platform for early diagnose of pancreatic cancer (PC). Despite the studies performed, the mechanism behind this phenomenon remains ambiguous. In this study, we explored the effects of two types of exosomes released by murine pancreatic cancer and ductal epithelial cells on murine skeletal muscle cells. The results show that PC-derived exosomes can readily enter C2C12 myotubes, triggering lipidosis and glucose intake inhibition...
July 14, 2017: Scientific Reports
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