A miR-146a-5p/TRAF6/NF-kB p65 axis regulates pancreatic cancer chemoresistance: functional validation and clinical significance

: Dysregulated microRNA (miRNA) expression in cancer can act as a key factor that modifies biological processes, including chemoresistance. Our study aimed to identify the miRNAs associated with gemcitabine (GEM) resistance in pancreatic ductal adenocarcinoma (PDAC) and to explore the potential mech...

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Veröffentlicht in:Theranostics 2020-01, Vol.10 (9), p.3967-3979
Hauptverfasser: Meng, Qingcai, Liang, Chen, Hua, Jie, Zhang, Bo, Liu, Jiang, Zhang, Yiyin, Wei, Miaoyan, Yu, Xianjun, Xu, Jin, Shi, Si
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container_end_page 3979
container_issue 9
container_start_page 3967
container_title Theranostics
container_volume 10
creator Meng, Qingcai
Liang, Chen
Hua, Jie
Zhang, Bo
Liu, Jiang
Zhang, Yiyin
Wei, Miaoyan
Yu, Xianjun
Xu, Jin
Shi, Si
description : Dysregulated microRNA (miRNA) expression in cancer can act as a key factor that modifies biological processes, including chemoresistance. Our study aimed to identify the miRNAs associated with gemcitabine (GEM) resistance in pancreatic ductal adenocarcinoma (PDAC) and to explore the potential mechanisms. : The miRNA microarray was used to identify miRNAs associated with GEM resistance. Quantitative real-time PCR was used to examine miR-146a-5p expression in paired PDAC and adjacent normal tissues. Bioinformatics analysis, luciferase reporter assays, and chromatin immunoprecipitation assays were used to confirm tumor necrosis factor receptor-associated factor 6 (TRAF6) as a direct target of miR-146a-5p and to explore the potential transcription factor binding and regulation by miR-146a-5p. and experiments were performed to investigate the mechanisms. : MiR-146a-5p expression was significantly decreased in PDAC tissues compared with adjacent normal tissues, and miR-146a-5p expression correlated with prognosis in PDAC patients. Functional studies indicated that miR-146a-5p suppressed PDAC cell proliferation and sensitized PDAC cells to GEM chemotherapy by targeting the 3'-untranslated region (3'-UTR) of TRAF6. MiR-146a-5p was also observed to downregulate the TRAF6/NF-κB p65/P-gp axis, which regulates PDAC cell growth and chemoresistance. : Taken together, the results indicate that the miR-146a-5p/TRAF6/NF-κB p65 axis drives pancreatic chemoresistance by regulating P-gp, suggesting that miR-146a-5p may be utilized as a new therapeutic target and prognostic marker in PDAC patients.
doi_str_mv 10.7150/thno.40566
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Our study aimed to identify the miRNAs associated with gemcitabine (GEM) resistance in pancreatic ductal adenocarcinoma (PDAC) and to explore the potential mechanisms. : The miRNA microarray was used to identify miRNAs associated with GEM resistance. Quantitative real-time PCR was used to examine miR-146a-5p expression in paired PDAC and adjacent normal tissues. Bioinformatics analysis, luciferase reporter assays, and chromatin immunoprecipitation assays were used to confirm tumor necrosis factor receptor-associated factor 6 (TRAF6) as a direct target of miR-146a-5p and to explore the potential transcription factor binding and regulation by miR-146a-5p. and experiments were performed to investigate the mechanisms. : MiR-146a-5p expression was significantly decreased in PDAC tissues compared with adjacent normal tissues, and miR-146a-5p expression correlated with prognosis in PDAC patients. Functional studies indicated that miR-146a-5p suppressed PDAC cell proliferation and sensitized PDAC cells to GEM chemotherapy by targeting the 3'-untranslated region (3'-UTR) of TRAF6. MiR-146a-5p was also observed to downregulate the TRAF6/NF-κB p65/P-gp axis, which regulates PDAC cell growth and chemoresistance. : Taken together, the results indicate that the miR-146a-5p/TRAF6/NF-κB p65 axis drives pancreatic chemoresistance by regulating P-gp, suggesting that miR-146a-5p may be utilized as a new therapeutic target and prognostic marker in PDAC patients.</description><identifier>ISSN: 1838-7640</identifier><identifier>EISSN: 1838-7640</identifier><identifier>DOI: 10.7150/thno.40566</identifier><identifier>PMID: 32226532</identifier><language>eng</language><publisher>Australia: Ivyspring International Publisher Pty Ltd</publisher><subject>Animals ; Antibodies ; Apoptosis ; Cancer therapies ; Carcinoma, Pancreatic Ductal - drug therapy ; Carcinoma, Pancreatic Ductal - metabolism ; Cell growth ; Cell Line, Tumor ; Cell Proliferation ; Clinical significance ; Drug Resistance, Neoplasm ; Gene Expression Regulation, Neoplastic ; Glycoproteins ; Humans ; Intracellular Signaling Peptides and Proteins - metabolism ; Kinases ; Laboratory animals ; Medical prognosis ; Medical research ; Mice ; Mice, Inbred BALB C ; Mice, Nude ; MicroRNAs ; MicroRNAs - physiology ; Mutagenesis ; Pancreatic cancer ; Pancreatic Neoplasms - drug therapy ; Pancreatic Neoplasms - metabolism ; Protein expression ; Proteins ; Reagents ; Research Paper ; Software ; Survival analysis ; Transcription Factor RelA - metabolism ; Tumorigenesis ; Tumors</subject><ispartof>Theranostics, 2020-01, Vol.10 (9), p.3967-3979</ispartof><rights>The author(s).</rights><rights>2020. 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Our study aimed to identify the miRNAs associated with gemcitabine (GEM) resistance in pancreatic ductal adenocarcinoma (PDAC) and to explore the potential mechanisms. : The miRNA microarray was used to identify miRNAs associated with GEM resistance. Quantitative real-time PCR was used to examine miR-146a-5p expression in paired PDAC and adjacent normal tissues. Bioinformatics analysis, luciferase reporter assays, and chromatin immunoprecipitation assays were used to confirm tumor necrosis factor receptor-associated factor 6 (TRAF6) as a direct target of miR-146a-5p and to explore the potential transcription factor binding and regulation by miR-146a-5p. and experiments were performed to investigate the mechanisms. : MiR-146a-5p expression was significantly decreased in PDAC tissues compared with adjacent normal tissues, and miR-146a-5p expression correlated with prognosis in PDAC patients. Functional studies indicated that miR-146a-5p suppressed PDAC cell proliferation and sensitized PDAC cells to GEM chemotherapy by targeting the 3'-untranslated region (3'-UTR) of TRAF6. 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Our study aimed to identify the miRNAs associated with gemcitabine (GEM) resistance in pancreatic ductal adenocarcinoma (PDAC) and to explore the potential mechanisms. : The miRNA microarray was used to identify miRNAs associated with GEM resistance. Quantitative real-time PCR was used to examine miR-146a-5p expression in paired PDAC and adjacent normal tissues. Bioinformatics analysis, luciferase reporter assays, and chromatin immunoprecipitation assays were used to confirm tumor necrosis factor receptor-associated factor 6 (TRAF6) as a direct target of miR-146a-5p and to explore the potential transcription factor binding and regulation by miR-146a-5p. and experiments were performed to investigate the mechanisms. : MiR-146a-5p expression was significantly decreased in PDAC tissues compared with adjacent normal tissues, and miR-146a-5p expression correlated with prognosis in PDAC patients. Functional studies indicated that miR-146a-5p suppressed PDAC cell proliferation and sensitized PDAC cells to GEM chemotherapy by targeting the 3'-untranslated region (3'-UTR) of TRAF6. MiR-146a-5p was also observed to downregulate the TRAF6/NF-κB p65/P-gp axis, which regulates PDAC cell growth and chemoresistance. : Taken together, the results indicate that the miR-146a-5p/TRAF6/NF-κB p65 axis drives pancreatic chemoresistance by regulating P-gp, suggesting that miR-146a-5p may be utilized as a new therapeutic target and prognostic marker in PDAC patients.</abstract><cop>Australia</cop><pub>Ivyspring International Publisher Pty Ltd</pub><pmid>32226532</pmid><doi>10.7150/thno.40566</doi><tpages>13</tpages><oa>free_for_read</oa></addata></record>
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subjects Animals
Antibodies
Apoptosis
Cancer therapies
Carcinoma, Pancreatic Ductal - drug therapy
Carcinoma, Pancreatic Ductal - metabolism
Cell growth
Cell Line, Tumor
Cell Proliferation
Clinical significance
Drug Resistance, Neoplasm
Gene Expression Regulation, Neoplastic
Glycoproteins
Humans
Intracellular Signaling Peptides and Proteins - metabolism
Kinases
Laboratory animals
Medical prognosis
Medical research
Mice
Mice, Inbred BALB C
Mice, Nude
MicroRNAs
MicroRNAs - physiology
Mutagenesis
Pancreatic cancer
Pancreatic Neoplasms - drug therapy
Pancreatic Neoplasms - metabolism
Protein expression
Proteins
Reagents
Research Paper
Software
Survival analysis
Transcription Factor RelA - metabolism
Tumorigenesis
Tumors
title A miR-146a-5p/TRAF6/NF-kB p65 axis regulates pancreatic cancer chemoresistance: functional validation and clinical significance
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