Effects of ω-3 polyunsaturated fatty acids on damage of intestinal mucosa of rats with severe burn in early stage and the mechanism
10.3760/cma.j.issn.1009-2587.2017.08.004
- VernacularTitle: ω－3多不饱和脂肪酸对严重烧伤大鼠早期肠黏膜损伤的影响及其机制
- Author:
Chen CAI
1
;
Zhengguo XIA
;
Qinglian XU
;
Xingzhao LI
Author Information
1. Department of Burns, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
- Publication Type:Journal Article
- Keywords:
Burns;
Fatty acids, omega-3;
Intestinal mucosa;
NF-kappa B;
Inflammatory mediators
- From:
Chinese Journal of Burns
2017;33(8):476-480
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To observe the effects of ω-3 polyunsaturated fatty acids (PUFA) on damage of intestinal mucosa of rats with severe burn in early stage and to explore the mechanism.
Methods:One hundred and twenty SD rats were divided into sham injury group, pure burn group, and ω-3 PUFA group according to the random number table, with 40 rats in each group. Rats in sham injury group were sham injured, while rats in pure burn group and ω-3 PUFA group were inflicted with 30% total body surface area full-thickness scald (hereinafter referred to as burn) on the back. Rats in sham injury group and pure burn group were injected with normal saline solution (1 mL/kg) by tail vein, while rats in ω-3 PUFA group were injected with ω-3 PUFA solution (1 mL/kg) by the same way at 5 minutes post injury. At post injury hour (PIH) 3, 6, 12, 24, and 48, abdominal aorta blood and intestinal mucosa were collected from 8 rats in each group, respectively. Serum content of diamine oxidase (DAO) was detected by spectrophotography. Serum content of tumor necrosis factor alpha (TNF-α) and interleukin-6 (IL-6) was determined by enzyme-linked immunosorbent assay. Protein expression of NF-κB-p65 in intestinal mucosa was determined by Western blotting. Data were processed with analysis of variance of factorial design, one-way analysis of variance, chi-square test, LSD test, and Bonferroni correction.
Results:(1) At all time points post injury, serum content of DAO of rats in pure burn group and ω-3 PUFA group was significantly higher than that in sham injury group (with P values below 0.01), and serum content of DAO of rats in ω-3 PUFA group was significantly lower than that in pure burn group (with P values below 0.01). (2) At all time points post injury, serum content of TNF-α and IL-6 of rats in pure burn group and ω-3 PUFA group was significantly higher than that in sham injury group (with P values below 0.01), and serum content of TNF-α and IL-6 of rats in ω-3 PUFA group was obviously lower than that in pure burn group (with P values below 0.01). (3) At all time points post injury, protein expressions of NF-κB-p65 in intestinal mucosa of rats in pure burn group and ω-3 PUFA group were significantly higher than those in sham injury group (with P values below 0.01). At PIH 3, 6, 12, 24, and 48, protein expressions of NF-κB-p65 in intestinal mucosa of rats in ω-3 PUFA group were 1.398±0.016, 1.999±0.948, 2.803±0.065, 1.739±0.602, and 1.484±0.645, obviously lower than 2.096±0.113, 3.402±0.189, 4.183±0.558, 3.618±0.408, and 2.614±0.775 in pure burn group (with P values below 0.01).
Conclusions:The ω-3 PUFA may alleviate intestinal mucosa injury of rats with severe burn in early stage through reducing protein expression of NF-κB-p65 of intestinal mucosa, serum content of DAO, TNF-α, and IL-6, and inhibiting inflammatory response.
