Gene expression profiling of inflammatory cytokines in ...
[Pages:22]ZavalaSolares et al. BMC Gastroenterol (2021) 21:201
RESEARCH ARTICLE
Open Access
Gene expression profiling of inflammatory cytokines in esophageal biopsies of different phenotypes of gastroesophageal reflux disease: a crosssectional study
M?nica R. ZavalaSolares1, Gabriela FonsecaCamarillo2, Miguel Valdovinos3, Julio Granados4, Guido GrajalesFigueroa5, Luis ZamoraNava5, Nancy AguilarOlivos5, Luis R. ValdovinosGarc?a5 and Jes?s K. YamamotoFurusho2*
Abstract
Background: The clinical endoscopic phenotypes of gastroesophageal reflux disease (GERD) are classified as Barrett's esophagus (BE), erosive esophagitis (EE) and non-erosive gastroesophageal reflux disease (NERD). NERD is subclassi fied as abnormal acid exposure (AAE) and normal acid exposure (NAE) based on pH monitoring study results. The aim of this study was to characterize genes involved in the pathophysiology and immune response of GERD.
Methods: This is an observational and cross-sectional study. All patients with BE, EE, AAE, and NAE and a control group were subjected to superior endoscopy (with biopsies of esophageal mucosa). Relative mRNA quantification of cytokine and target genes was conducted by quantitative Polymerase Chain Reaction (RT-qPCR). Changes in the expression of genes associated with inflammation were assessed for each disease phenotype. Statistical analysis of differential gene expression was performed using the Mann?Whitney U non-parametric test. A p value ................
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