Molecular detection of host cytokine expression in Helicobacter pylori infected patients via semi-quantitative RT-PCR.
Indian J Med Microbiol
;
2010 Jan-Mar; 28(1): 40-44
Article
in English
| IMSEAR
| ID: sea-143644
ABSTRACT
Background:
Helicobacter pylori (Hp) is a bacterium recognised as a main causative agent for the development of chronic active gastritis, peptic ulcer disease, gastric adenocarcinoma and primary gastric lymphoma.Objective:
Determination of the levels of IFN-γ (pro-inflammatory) and IL-4 (anti inflammatory) cytokine expression as indicators of Th1 and Th2 immune responses in gastric cancer (GC) and non gastric cancer (Non GC) dyspeptic patients by gene specific RT-PCR. Materials andMethods:
Biopsy specimens were collected from three groups of gastric cancer (GC=18), non ulcer dyspepsia (NUD = 38) and peptic ulcer patients (PUD=20). Total RNA was extracted and complementary DNA was synthesised. PCR amplification was performed for HPRT, IFN-γ and IL-4 cytokines and the intensity of each band was measured by densitometry and normalized against HPRT expression as a house keeping gene.Results:
Comparison of the results from different groups of patients indicated that IFN-γ gene expression was similar in nonGC dyspeptic patients (NUD and PUD groups; 3.38 ± 0.57,3.43 ± 0.41, respectively) whereas, in GC patients, it was significantly higher than others (5.52 ± 0.59; P < 0.0001). On the other hand, IL-4 gene expression showed no significant difference between NUD and GC patients (2.81 ± 0.43,2.3 ± 0.12 respectively), whereas the expression rate of this cytokine was significantly higher in PUD patients (3.7 ± 0.1; P 0.05). Our data indicate an association between Th1 and Th2 immune responses and the development of gastric cancer and peptic ulcer disease respectively.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Type of study:
Diagnostic study
Language:
English
Journal:
Indian J Med Microbiol
Journal subject:
Microbiology
Year:
2010
Type:
Article
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