The relationship of peroxisome proliferator activated receptor γ ligands activity in nucleated cell and interleukin-6 level in septic rate

Objective To observe the relationship between activity of peroxisome proliferator activated receptor γ (PPARγ) in nucleated cell and level of pro-inflammatory mediator interleukin-6 (IL-6) in plasma of rats with sepsis. Methods According to the random number table, 90 male Sprague-Dawley (SD)rats were randomly divided into three groups, namely control group, sham operation group and sepsis group.Each group was further divided into three subgroups according to postoperative time points, i.e. 12, 24 and 48-hour subgroups. Each subgroup consisted of 10 rats. Sepsis was reproduced by cecal ligation and puncture (CLP). The PPARγ activity in nucleated cells and IL-6 level in plasma were detected by enzyme-linked immunosorbent assay (ELISA). Results The PPARγ activity in nucleated cells was significantly decreased at 12, 24 and 48 hours in sepsis group (A value: 0. 279±0. 004, 0. 264±0. 009, 0. 245±0. 012) compared with control group (0. 292 ± 0. 007, 0.293 ±0.004, 0.293 ±0.005) and sham operation group (0. 295 ±0.008, 0.295 ±0.006, 0. 294 ± 0. 007), while the IL-6 level was significantly increased in sepsis group (ng/L; 365. 25 ±15. 53, 507.16 ±20. 86, 437. 89 ±25.09) compared with control group (43. 54 ± 11.10,48. 82±10. 62, 42. 96±9. 52) and sham operation group (42. 43±6. 77, 40. 32±6. 48, 44.10±9. 36, all P＜0. 05). When septic condition became worse, the PPARγ activity in nucleated cells of sepsis group lowered,and IL-6 level was gradually elevated after operation, reaching the peak at 24 hours, and then gradually lowered, and the difference of the value between any two time points was all statistically significant (all P＜0. 05). There was a negative correlation between the PPARγ activity in nucleated cells and IL-6 level in 12-hour subgroup of sepsis group (r=-0. 703, P=0. 023). Conclusion In septic rats, the PPARγ activity in nucleated cells was lowered while the pro-inflammatory mediator IL-6 level in plasma elevated, and there was a negative correlation between PPARγ activity and IL-6 level.