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Isolation and Th17 Differentiation of Naïve CD4 T Lymphocytes
Published on: September 26, 2013
Interleukin-17 serum levels and TLR4 polymorphisms in ulcerative colitis
Mojgan Mohammadi1, Mohammad Javad Zahedi, Amin Reza Nikpoor
1Physiology Research Centre, Kerman University of Medical Sciences, Kerman, Iran,
This study found elevated Interleukin-17 (IL-17) serum levels in ulcerative colitis (UC) patients, but no link to Toll-like receptor 4 (TLR-4) gene polymorphisms. Anemia in UC patients was inversely correlated with IL-17 levels.
Area of Science:
- Immunology
- Genetics
- Gastroenterology
Background:
- Inflammatory bowel disease (IBD), including ulcerative colitis (UC), is an autoimmune condition.
- Interleukin-17 (IL-17) is a key cytokine in autoimmune diseases.
- Toll-like receptor 4 (TLR-4) gene polymorphisms have been implicated in IL-17 production in UC.
Purpose of the Study:
- To investigate the association between TLR-4 gene polymorphisms (Asp299Gly, Thr399Ile) and IL-17 serum levels in UC patients.
- To examine the influence of these TLR-4 polymorphisms on IL-17 levels in UC patients and healthy controls.
Main Methods:
- Genotyping of TLR-4 Asp299Gly and Thr399Ile polymorphisms using PCR-RFLP.
- Quantification of IL-17 serum levels via ELISA.
- Study included 85 UC patients and 256 healthy controls.
Main Results:
- No significant difference in TLR-4 gene polymorphism frequencies between UC patients and controls.
- Significantly higher IL-17 serum levels were observed in UC patients compared to controls (p=0.003).
- No significant association was found between IL-17 levels and specific TLR-4 genotypes.
- A significant inverse correlation between hemoglobin levels and IL-17 serum levels in UC patients (p=0.039).
Conclusions:
- Elevated IL-17 in UC patients may result from IL-17/IL-23 axis activity, contributing to severe clinical outcomes.
- The inverse correlation between hemoglobin and IL-17 suggests a link between anemia, iron metabolism, and inflammation in UC.
- The study did not find an association between TLR-4 polymorphisms and UC in the studied Caucasian population.
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