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Type: Artigo de periódico
Title: Evaluation Of Five Dna Extraction Methods For Detection Of H. Pylori In Formalin-fixed Paraffin-embedded (ffpe) Liver Tissue From Patients With Hepatocellular Carcinoma.
Author: Rabelo-Gonçalves, Elizabeth
Roesler, Bruna
Guardia, Ana Carolina
Milan, Arlete
Hara, Natalicia
Escanhoela, Cecília
Almeida, Jazon
Boin, Ilka
Zeitune, José Murilo
Abstract: Since Helicobacter spp. DNA was identified in liver tissue resected from patients with hepatocelullar carcinoma (HCC), researchers have suggested a role of this bacterium in hepatic carcinogenesis. Archives of formalin-fixed, paraffin-embedded (FFPE) tissues represent an extraordinary source for clinical studies providing many advantages. However, DNA extraction from FFPE tissues is laborious, time-consuming and still remains a challenge. The aim of this study was to evaluate five protocols for DNA extraction from FFPE liver obtained from patients with HCC in order to detect Helicobacter pylori DNA. These methods were: (1) QIAamp FFPE Tissue Kit, (2) QIAamp DNA Mini Kit, (3) Wizard SV Genomic DNA Purification System, (4) RealiaPrep FFPE gDNA Miniprep System and (5) phenol-chloroform. H. pylori detection was performed using 16S rRNA gene amplification by PCR. The highest total amount of DNA was obtained using the phenol-chloroform method. Analyses of 16S rRNA gene amplification did not show statistically significant differences among the methods (p=0.466), although the highest percentage of positive cases (70%) was found in samples extracted with phenol-chloroform. We suggest that of the five methods evaluated, phenol/chloroform is the most suitable for detection of H. pylori in FFPE liver from patients with HCC.
Subject: Carcinoma, Hepatocellular
Dna, Bacterial
Helicobacter Infections
Helicobacter Pylori
Liver Neoplasms
Middle Aged
Paraffin Embedding
Rna, Ribosomal, 16s
Retrospective Studies
Specimen Handling
Tissue Fixation
16s Ribosomal Rna
Helicobacter Pylori
Paraffin Embedded
Rights: fechado
Identifier DOI: 10.1016/j.prp.2013.11.003
Date Issue: 2014
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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