Objective: To investigate the influence of intermittent cold stress on collagen content of atherosclerotic plaque in experimental ApoE-/-mice.
Methods: A total of 20 male ApoE-/-mice at 8 weeks of age were divided into 2 groups:Experimental group, the mice had intermittent cold exposure at (4 ± 1)°C from 8am to 12noon and Control group, the mice were living at (24 ± 2) °C. All animals were treated for 12 weeks, n=10 in each group. The collagen content of atherosclerotic plaque at the aortic root in ApoE-/-mice was observed by Masson staining, the protein expressions of aortic MMP-2, MMP-9 and TIMP-1 were examined by Western blot analysis.
Results: Compared with Control group, the Experimental group presented the lower collagen content of atherosclerotic plaque at the aortic root, higher protein expressions of MMP-2, MMP-9 and lower protein expression of TIMI 1.
Conclusion: Intermittent cold stress may disturb the balance of MMP/TIMP and decrease collagen content of atherosclerotic plaque to form vulnerable plaque in experimental ApoE-/-mice which may cause acute coronary syndrome.

Objective To explore the effect of childhood abuse on suicidal ideation and the influencing factors among recruits.Methods Through stratified sampling,505 recruits in Nanjing were tested by childhood Trauma Questionnaire (CTQ),Simplified Coping Style Questionnaire (SCSQ),Social Support Rating Scale (SSRS),Self-rating Idea of Suicide Scale(SIOSS) and Beck Hopelessness Scale (BHS).Results 1.The scores of suicidal ideation and hopelessness in recruits who had childhood abuse were significantly higher than those in control group ((5.56±4.58) vs (2.11±2.79),(5.93±3.01)vs (3.10±2.27),P＜0.01).2.The score of positive coping in recruits who had childhood abuse was significantly lower than that in control group(18.98±6.16 vs 23.27±7.45; P＜0.05).The score of negative coping in recruits who had childhood abuse was significantly higher than that in control group(9.27±5.04 vs 23.27±7.45; P＜0.01).3.The scores of social support in recruits who had childhood abuse were significantly lower than that in control group ((69.38± 10.43),(20.16±3.97),(25.73±3.68),(22.82±5.52) vs(75.55±9.67),(23.25±2.50),(27.56±3.51),(24.67±5.33) ; P＜0.05).4.The score of total CTQ was positively correlated with suicidal ideation,hopelessness,negative coping(r=0.379,0.402,0.228; P＜0.01),but negatively correlated with active coping style,social support(r=-0.285,-0.302; P＜0.01).Conclusion The recruits who had childhood abuse are susceptible to suicidal ideation.The negative coping style and lacking of social support may be the main factors to the suicidal ideation.

Objective To explore the feasibility and efficiency of the treatment of lumbar degenerative diseases after transforaminal lumbar interbody fusion(TLIF)and posterolateral fusion(PLF)procedures in which unilateral pedicle screw fixation was used.Methods From December 2006 to August 2008,78 cases with the lumbar degenerative diseases who received lumbar posterolateral fusion were analyzed.There were 48 cases of which underwent TLIF and PLF procedures with unilateral pedicle screw fixation(unilateral group),including 25 males and 23 females with an average of 47.6 years;and 30 cases of which underwent TLIF and PLF procedures with bilateral pedicle screw fixation(bilateral group),including 21 males and 9 females with an average of 50.5 years.The clinical effects between the two groups were evaluated with Oswestry disability index and visual analogue score(VAS)index.The operation time,blood loss,fusion rates and intervertebral collapse rates were also compared.Results Oswestry disability index,low back pain VAS index and skelalgia VAS index in both groups showed statistical significance between preoperation and 3 months,or 3 months and 1 year postoperatively.There was no difference in score improvement between the two groups.There were difference in operation time,blood loss and cost of hospitalization between unilateral and bilateral group.The former was lower.There was no difference in postoperative length of stay between the two groups.The fusion rate of unilateral group and bilateral group were 91.7%(44/48)and 93.3%(28/30),respectively.Conclusion Auto graft combined with unilateral pedicle screw fixation provids better spinal instant stability.TLIF and PLF with unilateral pedicle screw fixation was a satisfactory method in treating degenerative disease of lumbar vertebrae.