Effects of supplemental dietary arginine on the exogenous advanced glycosylation end product-induced interleukin-23/interleukin-17 immune response in rats

Chiu Li Yeh, Ya Mei Hu, Jun Jen Liu, Wei Jao Chen, Sung Ling Yeh

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Objectives: Arginine (Arg) is known to possess numerous useful physiological properties and immunomodulatory effects. Th17 cells are a unique T-helper cell lineage. Regulation of Th17 cells plays a significant role in the pathogenesis of inflammatory disorders. This study investigated the effect of Arg on the exogenous advanced glycosylation end product (AGE)-induced Th17-mediated immune response. Methods: Rats were randomly divided into three groups. The control BSA (CB) group was fed a common diet and given a tail vein injection of non-glycated bovine serum albumin (BSA). The control AGE (CA) group was fed the common diet and injected with 2 mg AGE-BSA. Arg-AGE (AA) group was fed the Arg-supplemented diet and injected with 2 mg AGE-BSA. The experimental diets were identical in energy and nutrient distributions except for the amino acid content. Arg provided 2% of the total energy. Tail vein injections and diets were given daily. After 10 d, all rats were sacrificed, and blood samples were collected for further analysis. Results: The AA group had the highest inducible nitric oxide (NO) synthase expression and plasma NO levels. The percentage of Foxp3 T-regulatory cells in the AA group was lower than those of the CA and CB groups. Transforming growth factor-β1, interleukin (IL)-6, and IL-17A gene expression was higher in the AGE-administered groups. The AA group had higher TGF-β1 and IL-17A expression than did the CA group. Conclusion: These results suggest that in a condition of exogenous AGE administration, supplemental dietary Arg resulted in a more pronounced IL-23/IL-17 immune response, possibly by increasing NO secretion.

Original languageEnglish
Pages (from-to)1063-1067
Number of pages5
JournalNutrition
Volume28
Issue number10
DOIs
Publication statusPublished - Oct 2012

    Fingerprint

Keywords

  • Advanced glycosylation end product
  • Arginine
  • Foxp3 T-regulatory cell
  • Th17

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Nutrition and Dietetics

Cite this