Analyzing miRNAs in ductal adenocarcinomas of the pancreas
Standard
Analyzing miRNAs in ductal adenocarcinomas of the pancreas. / Mees, Soeren Torge; Schleicher, Christina; Mardin, Wolf Arif; Senninger, Norbert; Colombo-Benkmann, Mario; Haier, Joerg.
in: J SURG RES, Jahrgang 169, Nr. 2, 08.2011, S. 241-6.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
Harvard
APA
Vancouver
Bibtex
}
RIS
TY - JOUR
T1 - Analyzing miRNAs in ductal adenocarcinomas of the pancreas
AU - Mees, Soeren Torge
AU - Schleicher, Christina
AU - Mardin, Wolf Arif
AU - Senninger, Norbert
AU - Colombo-Benkmann, Mario
AU - Haier, Joerg
N1 - Copyright © 2011 Elsevier Inc. All rights reserved.
PY - 2011/8
Y1 - 2011/8
N2 - BACKGROUND: MicroRNAs (miRNAs) have gained attention as an epigenetic component involved in the development of pancreatic ductal adenocarcinoma (PDAC). Several methods for miRNA profiling are in common use, but the validity of these methods is not defined. The aim of this study was to define the optimal method for miRNA detection in PDAC.METHODS: miRNA expression was determined using different and partially redundant methods (miRNA microarray, TaqMan low density array (TLDA), single tube quantitative RT-PCR). The data from different methods were statistically evaluated and tested for intermethodic consistency and reliability of the results. Finally, the miRNA expression status and the cell lines' ability to metastasize were correlated.RESULTS: Comparing low and high metastatic cells, miRNA-microarrays identified fewer differentially expressed and only upregulated miRNAs (n=27; 27 up-regulated) compared with TLDAs (n=54; 19 up- and 35 down-regulated). Evaluating miRNAs that target tumor suppressor genes, expression of all single tube quantitative real-time reverse transcriptase PCR (qRT-PCR) validated miRNAs was detected to be significantly altered in TLDA analysis (100%). MiRNA microarrays detected only 25% of qRT-PCR validated miRNAs. Furthermore, results from TLDA analysis correlated well with data from qRT-PCR and presented ΔΔCt values from 3.5±1.86 (range 0.8-5.62) compared with 3.74±1.86 (range 0.78-5.95) in qRT-PCR.CONCLUSION: Notable differences comparing data obtained from different screening methods were found. While TLDA and qRT-PCR correlated well in quantity and quality of the measured miRNAs, several tumor suppressor gene targeting and down-regulated miRNAs were not detected by miRNA-microarrays. This heterogeneity shows that care must be exercised when comparing results from different methods in PDAC.
AB - BACKGROUND: MicroRNAs (miRNAs) have gained attention as an epigenetic component involved in the development of pancreatic ductal adenocarcinoma (PDAC). Several methods for miRNA profiling are in common use, but the validity of these methods is not defined. The aim of this study was to define the optimal method for miRNA detection in PDAC.METHODS: miRNA expression was determined using different and partially redundant methods (miRNA microarray, TaqMan low density array (TLDA), single tube quantitative RT-PCR). The data from different methods were statistically evaluated and tested for intermethodic consistency and reliability of the results. Finally, the miRNA expression status and the cell lines' ability to metastasize were correlated.RESULTS: Comparing low and high metastatic cells, miRNA-microarrays identified fewer differentially expressed and only upregulated miRNAs (n=27; 27 up-regulated) compared with TLDAs (n=54; 19 up- and 35 down-regulated). Evaluating miRNAs that target tumor suppressor genes, expression of all single tube quantitative real-time reverse transcriptase PCR (qRT-PCR) validated miRNAs was detected to be significantly altered in TLDA analysis (100%). MiRNA microarrays detected only 25% of qRT-PCR validated miRNAs. Furthermore, results from TLDA analysis correlated well with data from qRT-PCR and presented ΔΔCt values from 3.5±1.86 (range 0.8-5.62) compared with 3.74±1.86 (range 0.78-5.95) in qRT-PCR.CONCLUSION: Notable differences comparing data obtained from different screening methods were found. While TLDA and qRT-PCR correlated well in quantity and quality of the measured miRNAs, several tumor suppressor gene targeting and down-regulated miRNAs were not detected by miRNA-microarrays. This heterogeneity shows that care must be exercised when comparing results from different methods in PDAC.
KW - Adenocarcinoma
KW - Carcinoma, Pancreatic Ductal
KW - Cell Line, Tumor
KW - Epigenesis, Genetic
KW - Gene Expression Profiling
KW - Humans
KW - MicroRNAs
KW - Microarray Analysis
KW - Pancreatic Neoplasms
KW - Reproducibility of Results
KW - Reverse Transcriptase Polymerase Chain Reaction
U2 - 10.1016/j.jss.2009.10.005
DO - 10.1016/j.jss.2009.10.005
M3 - SCORING: Journal article
C2 - 20080250
VL - 169
SP - 241
EP - 246
JO - J SURG RES
JF - J SURG RES
SN - 0022-4804
IS - 2
ER -