ObjectiveTo observe the expression of mCD14 and human leucocyte antigen (HLA)-DR on peripheral blood mononuclear cell( PBMC ) and cytokine in severe sepsis and its significance.MethodsThirty-five patients with severe sepsis (patients group) and 15 healthy volunteers (control group)were selected in this study.The expression of mCD14,HLA-DR on PBMC,serum tumor necrosis factor (TNF)- α,interleukin(IL)-10,the total score of acute physiology and chronic health evaluation(APACHE Ⅱ )and sepsis-related organ failure assessment (SOFA) score of the patients were measured at the 1st,3rd,5th day after admission.ResultsThe expression of mCD14 and HLA-DR on PBMC,the levels of serum TNF- α and IL-10 were ( 2.61 ± 1.59 )％,( 10.25 ± 5.35 )％,(96.66 ± 45.38) ng/L,( 149.74 ± 77.15 ) ng/L in patients group,(5.57 ± 1.53)％,(59.28 ± 14.76)％,(0.12 ±0.00) ng/L,(5.67 ±2.16) ng/L in control group,there were significant differences between two groups (P ＜ 0.05 or ＜ 0.01 ).In patients group,the mortality of 28 days was 28.6％(10/35).The expression of mCD14 and HLA-DR on PBMC,SOFA score and APACHE Ⅱ at the 1st,3rd day showed no statistical significance between non-survivor patients and survivor patients (P ＞ 0.05 ),but at 5th day the expressions of mCD14 and HLA-DR on PBMC in survivor patients were significantly higher than those in non-survivor patients [ (5.12 ± 2.03 )％ vs.(2.75 ± 0.67 )％; (35.12 ±9.29)％ vs.(13.06 ±5.87) ％](P＜0.01 or ＜ 0.05),SOFA score and APACHE Ⅱ were significantly lower than those in non-survivor patients[ (4.48 ± 1.71 ) scores vs.( 10.70 ± 3.16 ) scores; (9.36 ± 5.57 ) scores vs.(25.60 ± 10.88) scores](P＜ 0.01 ).The levels of serum TNF- α and IL-10 at the 1st,3rd,5th day showed no statistical significance between non-survivor patients and survivor patients(P ＞ 0.05).Conclusions The expressions of mCD14 and HLA-DR on PBMC in severe sepsis show closely related to the outcome.The changes of serum TNF- α and IL- 10 can not reflect the prognosis of severe sepsis in 5 days.

Objective To investigate the effect of acetyl-L-carnitine (ALC) preconditioning on the PC12 cell apoptosis induced by oxygen-glucose deprivation.Methods PC12 cells were seeded in 96-well plates and randomly divided into 5 groups ( n =6 each):control group (group C),cell injury group (group Ⅰ) and preconditioning with different concentrations of ALC groups (groups A1-3 ).In group C,the cells were incubated with DMEM liquid culture medium containing glucose 0.5 g/L for 3 h.In groups Ⅰ and A1-3 the cells were incubated with DMEM liquid culture medium containing sodium hydrosulfite (Na2S2O4) 3 mmol/L and glucose 0.5 g/L for 3 h,and in addition the cells were pre-incubated with ALC 0.2,0.4 and 0.6 mmol/L for 24 h in groups A1-3 respectively.Cell viability was evaluated by MTF assay,while the apoptosis in cells was detected using TUNEL.The activities of ATPase and SOD and MDA content were also detected.Results Oxygen-glucose deprivation significantly increased the number of apoptotic cells and the content of MDA,and decreased the cell viability and activities of SOD and ATPase in group Ⅰ compared with group C ( P ＜ 0.05).Preconditioning with ALC significantly increased the cell viability and the activities of SOD and ATPaes,and decreased the number of apoptotic cells and the content of MDA in groups A1-3 compared with group Ⅰ ( P ＜ 0.05).Conclusion ALC preconditioning can attenuate PC12 cell injury induced by oxygen-glucose deprivation through inhibition of apoptosis in cells.