严重烧伤大鼠血清总抗氧化能力与NO、IL-6水平相关性研究

The relationship between the total plasma antioxidant capacity and the production of NO, IL-6 in severely burned rats

目的 :观察烧伤休克大鼠血清总抗氧化能力水平 (TAC)、一氧化氮 (NO)和白介素 6 (IL 6 )的变化 ,探讨血清中NO、IL 6与TAC的相关性。 方法 :选用SD大鼠制成 30 %三度烫伤后 ,根据分组在各时相点取颈动脉血 5～ 8ml,分离血清 ,用生化方法测定TAC和NO代谢产物 ,用放免法测定IL 6水平。 结果 :TAC在烧伤后即有明显的下降 ,而NO和IL 6水平则相应增高 ,以烧伤后 6h为最显著。相关分析可见NO与IL 6均与TAC的下降有负相关性 (r=- 0 .839,r =- 0 .785 )。 结论 :严重烧伤可导致血清总抗氧化能力水平的降低 ,与随后的炎症介质NO和IL 6的大量释放有明显相关性。提示在临床上提高TAC水平 ,以及阻断或中和活性氧 (OFRs)的产生可能会降低烧伤后全身炎症反应水平。

Objectives: To study the alteration of total plasma antioxidant capacity(TAC), NO and IL 6 in severely burned rats, and evaluate the relationship between TAC and NO or IL 6 production. Methods: Full thickness scald burn covering 30%TBSA was produced on SD rats. At different time the blood were collected for isolating the plasma. The TAC and NO were measured according to the protocols of kits. The IL 6 was measured by radioimmunoassay. Results:TAC decreased significantly after burns, following by the increasing production of NO and IL 6. The lowest TAC level and highest production of NO and IL 6 appeared at 6 h after burns. The correlation analysis showed that TAC and NO or IL 6 had negative correlation( r=-0.839, r =-0.783). Conclusions: The low TAC level might be the cause of the high production of inflammatory mediate such as NO and IL 6. It hints that enhancing TAC level might inhibit the production of NO and inflammatory cytokines.