Detailed Information on Publication Record
2023
Verification of diagnosis using CDX2 gene expression in esophageal fresh frozen tissue
MAJER, Adam, Natálie MLČŮCHOVÁ, Zdeněk PAVLOVSKÝ, Lumír KUNOVSKÝ, Radek KROUPA et. al.Basic information
Original name
Verification of diagnosis using CDX2 gene expression in esophageal fresh frozen tissue
Name (in English)
Verification of diagnosis using CDX2 gene expression in esophageal fresh frozen tissue
Authors
MAJER, Adam (203 Czech Republic), Natálie MLČŮCHOVÁ (203 Czech Republic), Zdeněk PAVLOVSKÝ (203 Czech Republic), Lumír KUNOVSKÝ (203 Czech Republic), Radek KROUPA (203 Czech Republic), Zdeněk KALA (203 Czech Republic) and Petra BOŘILOVÁ LINHARTOVÁ (203 Czech Republic, guarantor, belonging to the institution)
Edition
Setkání biochemiků a molekulárních biologů, 2023
Other information
Language
Czech
Type of outcome
Konferenční abstrakt
Field of Study
10608 Biochemistry and molecular biology
Country of publisher
Czech Republic
Confidentiality degree
není předmětem státního či obchodního tajemství
RIV identification code
RIV/00216224:14310/23:00133553
Organization unit
Faculty of Science
Keywords in English
gene expression; immunohistochemistry; CDX2; Barrett’s esophagus; adenocarcinoma
Změněno: 16/2/2024 13:19, Mgr. Terezie Slámová
V originále
Introduction The fresh frozen tissue (FFT) is preferably used for some molecular analyses, such as metagenomics and metatranscriptomics. In general, an examination should be performed to determine whether the bioptic tissue is pathological. CDX2 is expressed by intestinal cells and is already used as a diagnostic marker for Barrett’s esophagus (BE) and esophageal adenocarcinoma (EAC). This study aims to evaluate CDX2 gene expression in esophageal FFT from patients with gastroesophageal reflux disease (GERD) and to compare findings with histopathological diagnosis of parallel samples. Methods In 23 patients with GERD, endoscopic examination was carried out and 92 esophageal and 3 duodenal biopsies were taken. Two parallel bioptic tissues were obtained from two different sites of esophageal mucosa – site with the main pathology and adjacent site with macroscopically normal mucosa. 46 paired formalin-fixed paraffin-embedded (FFPE) samples were examined by pathologist and CDX2-staining immunohistochemistry (IHC) was performed. RNA was extracted from 46 paired esophageal FFT and 3 duodenum samples (served as positive controls) using the AllPrep DNA/RNA Mini Kit. Reverse transcription was performed using High-Capacity cDNA Reverse Transcription Kit and CDX2 mRNA levels were assessed using qPCR and Taqman Gene Expression Assays. Results All BE and EAC FFPE specimens revealed immunoreactivity for CDX2, while all esophageal FFPE samples from adjacent site were IHC-negative for CDX2. The CDX2 was expressed in 91 % of esophageal FFT with the main pathology from BE patients, in 58 % of esophageal FFT with the main pathology from EAC patients, as well as in 4.3 % of esophageal FFT taken from the macroscopically normal esophageal mucosa. Conclusion This study shows that a percentage of esophageal biopsies taken for molecular analyses has different diagnosis based on the CDX2 gene expression than parallel biopsies examined histopathollogically. For further metagenome or metatranscriptome studies, there is a need to find out a suitable marker, such as CDX2 in the case of BE and EAC, and to examine whether the tissue really represents the pathological or physiological condition.
In English
Introduction The fresh frozen tissue (FFT) is preferably used for some molecular analyses, such as metagenomics and metatranscriptomics. In general, an examination should be performed to determine whether the bioptic tissue is pathological. CDX2 is expressed by intestinal cells and is already used as a diagnostic marker for Barrett’s esophagus (BE) and esophageal adenocarcinoma (EAC). This study aims to evaluate CDX2 gene expression in esophageal FFT from patients with gastroesophageal reflux disease (GERD) and to compare findings with histopathological diagnosis of parallel samples. Methods In 23 patients with GERD, endoscopic examination was carried out and 92 esophageal and 3 duodenal biopsies were taken. Two parallel bioptic tissues were obtained from two different sites of esophageal mucosa – site with the main pathology and adjacent site with macroscopically normal mucosa. 46 paired formalin-fixed paraffin-embedded (FFPE) samples were examined by pathologist and CDX2-staining immunohistochemistry (IHC) was performed. RNA was extracted from 46 paired esophageal FFT and 3 duodenum samples (served as positive controls) using the AllPrep DNA/RNA Mini Kit. Reverse transcription was performed using High-Capacity cDNA Reverse Transcription Kit and CDX2 mRNA levels were assessed using qPCR and Taqman Gene Expression Assays. Results All BE and EAC FFPE specimens revealed immunoreactivity for CDX2, while all esophageal FFPE samples from adjacent site were IHC-negative for CDX2. The CDX2 was expressed in 91 % of esophageal FFT with the main pathology from BE patients, in 58 % of esophageal FFT with the main pathology from EAC patients, as well as in 4.3 % of esophageal FFT taken from the macroscopically normal esophageal mucosa. Conclusion This study shows that a percentage of esophageal biopsies taken for molecular analyses has different diagnosis based on the CDX2 gene expression than parallel biopsies examined histopathollogically. For further metagenome or metatranscriptome studies, there is a need to find out a suitable marker, such as CDX2 in the case of BE and EAC, and to examine whether the tissue really represents the pathological or physiological condition.
Links
| LM2023069, research and development project |
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| NU20-03-00126, research and development project |
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