Effect of enteral diet supplemented with arginine on anti-inflammatory cytokines after thermal injury in rats

  • Cui X
  • Iwasa M
  • Morisawa K
 et al. 
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Male Wistar rats weighing about 200g underwent catheter jejunostomy and received scald bums covering 30% of the whole-body surface area. Animals were divided into two groups: a control group (no supplemental arginine, n = 8) and an arginine group (supplemental arginine: 7.7 g/L, n = 8), both of whom received continuously total enteral nutrition for 7 days (250 kcal/kg/day, 1.72 gN/kg/day). The mRNA expression of interleukin-2 (IL-2), IL-10, and transforming growth factor-betal (TGF-β1) in the spleen, thymus, lungs, and liver was measured by a semiquantitative reverse transcription-polymerase chain reaction method. The concentration of the cytokines in plasma and supernatant of the cultured splenic lymphocytes was determined by enzyme-linked immunosorbent assay. The enteral diet supplemented with arginine significantly decreased the messenger RNA expression for IL-2 and TGF-β1 in the spleen (p < 0.05, p < 0.01), and for IL-2 in the lungs (p < 0.05) in burned rats when compared with the control diet. Moreover, the level of IL-2 in the supernatant from the cultured splenic lymphocytes was significantly suppressed in animals fed the arginine-supplemented diet (p < 0.05). These results suggest that dietary arginine supplementation decreases the mRNA expression and production of anti-inflammatory cytokines after thermal injury. © 2001 Elsevier Science rfInc. All rights reserved.

Author-supplied keywords

  • Arginine
  • Burned rat
  • Cytokine
  • Enteral nutrition
  • Thermal injury

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  • Xue Lin Cui

  • Masato Iwasa

  • Keiko Morisawa

  • Shiro Sasaguri

  • Shohei Ogoshi

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