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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
Matthew D Whiteside, Victor P J Gannon, Chad R Laing
Summary: Whole genome sequencing (WGS) is being adopted in public health for improved surveillance and outbreak analysis. In public health, subtyping has been used to infer phenotypes and distinguish bacterial strain groups. In silico tools that predict subtypes from sequences data are needed to transition historical data to WGS-based protocols. Phylotyper is a novel solution for in silico subtype prediction from gene sequences. Designed for incorporation into WGS pipelines, it is a general prediction tool that can be applied to different subtype schemes...
July 18, 2017: Bioinformatics
Jin Jiang, Zuguo Yuan, Yiqing Sun, Yuan Bu, Wenfeng Li, Zhenghua Fei
Erlotinib has shown activity in the management of pancreatic cancer. However, the benefit of EGFR blockade is limited due to EGFR independent PI3K/Akt signaling pathway. Studies have reported that Ginsenoside Rg3 strongly inhibited PI3K-Akt signaling pathway of many carcinomas. We aimed to investigate the activity of Ginsenoside Rg3 to sensitize erlotinib in treating pancreatic cancer in vitro and in vivo. Human pancreatic cancer cell lines BxPC-3 and AsPC-1 were used. Cell proliferation and colony formation assay, Annexin V/PI apoptosis analysis, Western blot analysis, immunohistochemistry and in vivo study were carried out...
October 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Ikhyun Jun, Hyung Soon Park, He Piao, Jung Woo Han, Min Ji An, Byeong Gyu Yun, Xianglan Zhang, Yong Hoon Cha, You Keun Shin, Jong In Yook, Jinsei Jung, Heon Yung Gee, Joon Seong Park, Dong Sup Yoon, Hei-Cheul Jeung, Min Goo Lee
BACKGROUND: Anoctamin (ANO)/transmembrane member 16 (TMEM16) proteins mediate diverse physiological and pathophysiological functions including cancer cell proliferation. The present study aimed to identify the role of ANOs in pancreatic cancer. METHODS: In an initial screen of ANOs, ANO9/TMEM16J was overexpressed in pancreatic cancer cells, and its role in the pathogenesis of pancreatic cancer was evaluated using an integrated in vitro and in vivo approach. To determine clinical relevance of the experimental findings, the prognostic value of ANO9 was evaluated in patients with pancreatic cancer...
October 12, 2017: British Journal of Cancer
Eun Jung Sohn, Deok-Beom Jung, HyoJung Lee, In Han, Jihyun Lee, Hyemin Lee, Sung-Hoon Kim
Here the underlying role of CNOT2, a subunit of CCR4-NOT complex, was elucidated in cancer progression. CNOT2 was overexpressed in HIT-T15, ASPC-1, BXPC-3, PC-3, LNCaP, MCF-7 and MDA-MB-231 cell lines, which was confirmed by Tissue array in various human tumor tissues. Also, CNOT2 depletion suppressed proliferation and colony formation of MDA-MB-231 cells. Of note, microarray revealed decreased expression of CNOT2, VEGF-A, HIF2 alpha (<0.5 fold) and increased expression of UMOD1, LOC727847, MMP4, hCG and other genes (>2...
October 9, 2017: Cancer Letters
Krishnendu Pal, Farah Al-Suraih, Roberto Gonzalez-Rodriguez, Shamit Kumar Dutta, Enfeng Wang, H Shaun Kwak, Thomas R Caulfield, Jeffery L Coffer, Santanu Bhattacharya
An astute modification of the plectin-1-targeting peptide KTLLPTP by introducing a C-terminal cysteine preceded by a tyrosine residue imparted a reducing property to the peptide. This novel property is then exploited to fabricate gold nanoparticles (GNP) via an in situ reduction of gold(iii) chloride in a one-pot, green synthesis. The modified peptide KTLLPTPYC also acts as a template to generate highly monodispersed, spherical GNPs with a narrow size distribution and improved stability. Plectin-1 is known to be aberrantly expressed in the surface of pancreatic ductal adenocarcinoma (PDAC) cells while showing cytoplasmic expression in normal cells...
October 9, 2017: Nanoscale
Fernando Martínez de Juan, María Reolid Escribano, Carmen Martínez Lapiedra, Fernanda Maia de Alcantara, María Caballero Soto, Ana Calatrava Fons, Isidro Machado
A 69-year-old woman from a kindred with familial atypical multiple mole melanoma and carrier of a germline mutation in CDKN2A, presented with abdominal pain caused by a solid-cystic pancreatic mass. The patient had an abdominal computed tomography three years before in which there was no evidence of pancreatic lesion. The endoscopic ultrasound guided fine needle aspiration showed adenocarcinoma with squamous component. After surgical resection the final diagnosis was adenosquamous pancreatic carcinoma (ASPC) arising in an intraductal papillar mucinous neoplasm (IPMN)...
September 15, 2017: World Journal of Gastrointestinal Oncology
Xu Han, Hexige Saiyin, Junjie Zhao, Yuan Fang, Yefei Rong, Chenye Shi, Wenhui Lou, Tiantao Kuang
Pancreatic ductal adenocarcinoma (PDAC) is a highly aggressive and malignant neoplasm. The aberrant expression of miR-135b-5p and secreted frizzled-related protein 4 (SFRP4) has been revealed to be involved in various cancers. However, the clinical significance of miR-135b-5p and that of its potential target SFRP4 in PDAC remain to be elucidated. Here, we found that miR-135b-5p was markedly upregulated in pancreatic cancer tissue compared with corresponding adjacent normal tissue, whereas SFRP4 was significantly downregulated...
September 22, 2017: Oncotarget
Feng Ding, Shuang Zhang, Shaoyang Gao, Jian Shang, Yanxia Li, Ning Cui, Qiu Zhao
MORF4-related gene-binding protein (MRGBP), which is also known as chromosome 20 open reading frame 20 (C20orf20), is commonly highly expressed in several types of malignant tumors and tumor progression. However, the expression pattern and underlying mechanism of MRGBP in pancreatic ductal adenocarcinoma (PDAC) remain unknown. In the study, we found that MRGBP was frequently upregulated in PDAC tissues and cell lines. In addition, the upregulation of MRGBP was positively associated with TNM stage, T classification, and poor prognosis...
September 8, 2017: Oncotarget
Hexuan Wang, Michael D Nieskoski, Kayla Marra, Jason R Gunn, Stuart B Trembly, Brian W Pogue, Marvin M Doyley
High tissue pressures prevent chemotherapeutics from reaching the parenchyma of pancreatic ductal adenocarcinoma, which makes it difficult to treat this aggressive disease. Researchers currently use invasive probes to monitor the effectiveness of pressure-reducing therapies, but this practice introduces additional complications. Here, we hypothesize that Young's modulus is a good surrogate for tissue pressure because collagen density and hyaluoronic acid, the key features of the tumor microenvironment responsible for high tissue pressures, also affect modulus elastograms...
September 27, 2017: Ultrasound in Medicine & Biology
Xiaochen Yin, Michelle R Salemi, Brett S Phinney, Velitchka Gotcheva, Angel Angelov, Maria L Marco
We identified the proteins synthesized by Lactobacillus delbrueckii subsp. bulgaricus strain LBB.B5 in laboratory culture medium (MRS) at 37°C and milk at 37 and 4°C. Cell-associated proteins were measured by gel-free, shotgun proteomics using high-performance liquid chromatography coupled with tandem mass spectrophotometry. A total of 635 proteins were recovered from all cultures, among which 72 proteins were milk associated (unique or significantly more abundant in milk). LBB.B5 responded to milk by increasing the production of proteins required for purine biosynthesis, carbohydrate metabolism (LacZ and ManM), energy metabolism (TpiA, PgK, Eno, SdhA, and GapN), amino acid synthesis (MetE, CysK, LBU0412, and AspC) and transport (GlnM and GlnP), and stress response (Trx, MsrA, MecA, and SmpB)...
September 2017: MSystems
Dai Hoon Han, Chang Moo Kang, Sung Whan Lee, Ho Kyoung Hwang, Woo Jung Lee
Alteration and activation of recepteur d'origine nantais (RON) expression is known to be associated with cancer progression and decreased survival in various types of human cancer, including pancreatic cancer. Therefore, in the present study, RON expression levels were determined in resected left-sided pancreatic cancer to evaluate the potential oncological role of RON in the clinical setting of distal pancreatic cancer. From January 2005 to December 2011, a total of 57 patients underwent radical distal pancreatectomy for left-sided pancreatic cancer...
October 2017: Oncology Letters
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
Jieying Li, Qin Jin, Fang Huang, Zhiyuan Tang, Jianfei Huang
OBJECTIVES: Rab family members are key regulatory factors that function as molecular switches in multiple phases of vesicular trafficking. Our previous study demonstrated that Rab27A and Rab27B overexpression may predict a poor outcome of pancreatic ductal adenocarcinoma. The purpose of this study was to investigate the role of Rab27A and Rab27B in the progression of pancreatic cancer. METHODS: We down-regulated Rab27A and Rab27B expression in pancreatic cancer cell lines...
October 2017: Pancreas
Carryn J Chetty, Eloise Ferreira, Katarina Jovanovic, Stefan F T Weiss
The 37kDa/67kDa laminin receptor (LRP/LR) serves various physiological and pathological roles such as enhancing tumour-related processes including metastasis, angiogenesis, cellular viability and telomerase activation in cancerous cell lines. The present study investigates the effect of siRNA mediated downregulation of LRP/LR on pancreatic cancer (AsPC-1) and neuroblastoma (IMR-32) cells. MTT and BrdU assays revealed that siRNA mediated downregulation of LRP resulted in a significant reduction in cell viability and cell proliferation...
September 9, 2017: Experimental Cell Research
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...
October 2017: Cancer Chemotherapy and Pharmacology
Satoshi Owada, Kanako Ito, Hitoshi Endo, Yukari Shida, Chisa Okada, Takahiro Nezu, Masayuki Tatemichi
BACKGROUND/AIM: Pancreatic cancer tissue is a hypoxic environment resistant to anticancer drugs. This study examined the role of autophagy as a response to hypoxic stress in pancreatic cancer. MATERIALS AND METHODS: Pancreatic cell lines (PANC-1, BxPC-3 and AsPC-1) were exposed to hypoxic conditions using cobalt chloride, a hypoxia-mimicking agent. Protein expression and cytotoxicity assays were performed to determine the effect of hypoxia on autophagy. RESULTS: When pancreatic cancer cells were exposed to hypoxia, autophagy was induced...
September 2017: Anticancer Research
Girgis Obaid, Bryan Q Spring, Shazia Bano, Tayyaba Hasan
The emergence of fluorescently labeled therapeutic antibodies has given rise to molecular probes for image-guided surgery. However, the extraneous interstitial presence of an unbound and nonspecifically accumulated probe gives rise to false-positive detection of tumor tissue and margins. Thus, the concept of tumor-cell activation of smart probes provides a potentially superior mechanism of delineating tumor margins as well as small tumor deposits. The combination of molecular targeting with intracellular activation circumvents the presence of extracellular, nonspecific signals of targeted probe accumulation...
August 2017: Journal of Biomedical Optics
Marzieh Moeinifard, Zuhair Mohammad Hassan, Faranak Fallahian, Maryam Hamzeloo-Moghadam, Mohammad Taghikhani
Induction of apoptosis in cancerous cells is considered as a promising treatment option for cancer therapy. The present study was designed to evaluate the anticancer properties of Britannin and its possible mechanisms of action in human pancreatic cancer cells. Apoptosis induction by Britannin was confirmed by annexin V-FITC/PI staining, Hoechst 33258 staining and caspase-3 activity assay in both AsPC-1 and Panc-1 cells. Additionally, by using western blot and Real-time PCR, we observed that Britannin induced apoptosis by decreasing the expression of BCL-2 and increasing the expression of BAX...
October 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Feng Ding, Shuang Zhang, Shaoyang Gao, Jian Shang, Yanxia Li, Ning Cui, Qiu Zhao
MORF4-related gene-binding protein (MRGBP), which is also known as chromosome 20 open reading frame 20 (C20orf20), is commonly highly expressed in several types of malignant tumors and tumor progression. However, the expression pattern and underlying mechanism of MRGBP in pancreatic ductal adenocarcinoma (PDAC) remain unknown. In the study, we found that MRGBP was frequently upregulated in PDAC tissues and cell lines. In addition, the upregulation of MRGBP was positively associated with TNM stage, T classification, and poor prognosis...
July 22, 2017: Oncotarget
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