Since the endotoxic fever is mediated essentially by endogenous pyrogen (EP), we have examined the possibility that the central cAMP is involved in the mechanism of biphasic fever induced by endotoxin, as in the case of biphasic fever induced by EP. The results showed that administration of endotoxin in rabbits elicited typical biphasic fever. The fluctuation of concentration of cAMP in cerebrospinal fluid (CSF) paralleled with the change of the rectal temperature, similar to that of the bipbasic fever caused by EP. Raised level of cAMP in plasma was observed only in the first phase. The cAMP concentration in CSF correlated positively with the febrile response. The correlation of cAMP levels in CSF and plasma was observed only in the first phase but not in all the febrilic periods. These findings indicated that the mechanism of endotoxic biphasic fever is associated with the Change of central cAMP. Content. The raised level of cAMP in CSF during fever is likely to represent the biosynthsis in brain regions. However, the possibility that the raised cAMP in plasma enters CSF in the first phase is not excluded.

The signals of body temperature from 4 different febrile patterns were sampled for power spectral analysis. The results showed that the spectrums had no difference between their distribution in frequency domain, only a low frequency peak has been seen. The values of the power spectrum varied directly to the intensity of the febrile responses. A high degree of relationship was found between the power spectral density and thermal response index (TRI).

AIM: To study the mechanism of the inhibitory effect of human polymorphonuclear leukocytes (PMN) on the production of tumor necrosis factor-? (TNF-?) in U937 cells. METHODS: PMA differentiated U937 cells were cocultured with PMN in the presence of lipopolysaccharide. Sodium azide was added in the culture. The supernatants of cell culture were collected and TNF-? was assayed with ELISA. RESULTS:The inhibitory effect of PMN on the production of TNF-? in U937 cells was observed. Sodium azide restored the TNF-? production in U937 cells/PMN coculture to the extent of 45% in concentration of about 10～15 ?mol/L. These concentrations of sodium azide did not affect TNF-? production by U937 cells. The restoration effect of sodium azide on PMN inhibition was not related to blocking of myeloperoxidase (MPO) activity. The MPO inhibitors 3-amino-1,2,4,-triazole and 4-aminobenzoyl hydrazide had few effect on PMN inhibition. CONCLUSION: These results indicated that PMN inhibition depended on the cell-cell interactions. Sodium azide may be a useful reagent for further studying this mechanism.

ObjectiveTo explore the role of psychological capital in psychological stress and mental maladjustment in recruits.Methods405 recruits were sampled and investigated using the psychological stress selfevaluation test( PSET),the psychological capital questionnaires(PCQ),and military mental maladjustment scale (MMMS).ResultsPsychological stress had significant positive correlation with each factor of mental maladjustment ( r =0.164 ～ 0.438,P ＜ 0.01 ),and psychological capital had significant negative correlation with each factor of mental maladjustment ( r=-0.312 ～ -0.463,P＜ 0.001 ).The hierarchical regression analysis indicated that psychological capital,confidence,hoping,resiliency and optimism had the positive prediction of all the four factors of mental maladjustment,the variance contribution rates were 27.2％,20.1％,25.8％ and 15.9％,respectively; the main effect of psychological capital(β1 =-0.406,P＜0.01 ;β2 =-0.351,P＜0.01 ) and psychological stress(β1 =0.304,P ＜ 0.01 ;β2 =0.267,P ＜ 0.01 ) on recruits'behavioral problem and interpersonal relationship maladjustment was significant,the interaction effect of psychological capital and psychological stress on recruits' behavioral problem (β =- 0.098,P ＜ 0.05 ) and interpersonal relationship maladjustment (β =- 0.087,P ＜ 0.05 ) was significant.ConclusionPsychological capital is a moderator in interaction between mental maladjustment and psychological stress.The PCQ score may predict the variation of recruits'mental status.

Objective To study the current status of morning blood pressure peak in elderly masked hypertension patients and study the correlation between morning blood pressure peak and cognitive function.Methods A total of 72 elderly masked hypertension patients were selected in this study,.Morning blood pressure peak was measured by ABPM examination.The patients were divided into three groups according to the morning blood pressure peak.Morning blood pressure peak ≤ 30 mmHg were divided into non-Morning blood pressure surge group ( NMS group),morning blood pressure peak ＞30 mmHg were divided into Morning blood pressure surge group ( MS group).The cognitive function scale was determined (MMSE and MoCA).T-test and linear regression analysis were performed.Results MMSE score(27.69±2.04) and MoCA scores(24.85 ± 1.52) in MS group were lower than NMS group (28.87 ± 1.34,26.54± 1.53) ( P ＜0.01 ).MMSE and MoCA scores were negatively correlated with the morning blood pressure peak ( r =- 0.308,- 0.447,P ＜ 0.01 ).Conclusions Elderly masked hypertension patients remained the phenomenon of the morning blood pressure peak,the morning blood pressure peak could lead to cognitive impairment.

Objective To study the association of SNP of the AdipoR1 gene with T2DM in Xi’an population. Methods The amplification refractory mutation system(ARMS) analysis and gene sequencing were used to investigate the AdipoR1 gene polymorphism in 100 type 2 diabetics and 84 normal control subjects. Results (1) The genotype and allele frequencies of -106A/G, 5843A/G were not significantly different between type 2 diabetics and normal control subjects. (2) The diagnosis age of diabetics was significantly younger in AdipoR1 5843GG genotype group than in other genotype groups. Conclusions The data implicate that the AdipoR1 gene -106A/G and 5843A/G polymorphism may be not associated with pathogenesis of T2DM. AdipoR1 5843 GG genotype may be associated with the earlier diagnosis of T2DM

Objective To evaluate the prevalence of aspirin resistance in old-aged patients with cerebral infarction and to analyze the mechanisms and clinical predictors of aspirin resistance. Methods 300 old-aged patients with cerebra] infarction were selected and the platelet aggregation ratio was determined by nephelometry with CHRONO-LOG PA-meter. And some information of these patients, such as age, sex, smoking, taking non-steroid anti-inflammatory drug (NSAD)or proton pump inhibitor (PPI), obesity, coronary artery disease (CAD), peripheral vascular disease, hyperpiesia, diabetes and hyperlipemia were recorded. Results 112 cases (37.33%) were aspirin sensitiveness, 108 cases(36.0%) were aspirin semi-resistance and 80 cases (26.67%) were aspirin resistance. These cases were divided into two groups. One was aspirin sensitive (AS) group, which included 112 patients of aspirin sensitiveness. The other was aspirin resistant (AR) group, which consisted of 188 patients of aspirin semi-resistance and aspirin resistance. The prevalence of CAD, hypercho]esteremia and RBC count in AR group was higher than that in AS group The percentage of patients who took NSAD, PPI and smoke in AR group was also higher than that in AS group. Conclusion Aspirin resistance existed in old-aged patients with cerebral infarction to great extent, and which was correlated with CAD, hypercholesteremia, smoking, RBC count, taking NSAD and PPI.

Objective To investigate the variations of serum levels of visfatin in pregnant women with different types of glucose intolerance and the associations with insulin resistance.metabolic parameters and newborn birth weight.Methods Totally,120 pregnant women in late trimester were divided into 3 groups according to the results of 50 g glucose challenge test(GCT)and 75 g oral glucose tolerance test:GDM group(n=45),GCT(+)group(n=20),and NGT group(n=55).Fasting levels of visfatin,insulin,total cholestrol and triglyceride were measured and the newborn birth weight was recorded.Results The serum visfatin level was significantly elevated in GDM group compared with the NGT group[(374.9±23.1)ng/ml vs(308.9±16.8)ng/ml,P＜0.05],but no significant difference was shown when compared with the GET(+)group[(346.5±23.1)ng/ml].Furthermore,serum visfatin levels had no relationship with insulin resistance,metabolic parameter and newbom birth weight.Conclusions Visfatin is elevated in GDM women and closely related with GDM,but not with insulin resistance,metabolic parameters and newborn birth weight.

Objective To acknowledge the incidence of sharp- appliance wound of trainee nurses and explore the relative countermeasures. Methods A retrospective investigation was carried out in 140 trainee nurses of grade 2003 about the incidence of sharp- appliance wounds, then the corresponding pre-ventive countermeasures were formulated and applied in the clinical practice of trainee nurses of grade 2004 and the incidence of sharp- appliance wound was investigated and compared with the results of those grade 2003.X2 test was adopted. Results The incidence rate of sharp- appliance wound in trainee nurses of grade 2004 was obviously lower than that of grade 2003. Conclusions Due to the weak safety con-sciousness, unfamiliar with operation and lack of clinical experience, the sharp- appliance wound will easily occur among trainee nurses. If the relative professional preventive knowledge is strengthened, the opera-tional procedures are observed strictly and the sense of responsibility of tutor teachers is facilitated, then the incidence of sharp- appliance wound of trainee nurses will drop.

Objective To investigate the relativity between morning blood pressure surge (MBPS) and carotid atheresclerosis. Methods Noninvasive ambulatory blood pressure monitor (ABPM) was per-formed on 97 patients with the first and second stage of essential hypertension and according the ABPM re-suits, the patients were classified into MP+ group (31 cases) and MP-group (66 cases). In the meantime, the carotid intima-media thickness (IMT) and the carotid atheresclerotic plaque was examined by the color Doppler ultrasound. The relationship among MBPS, carotid atherosclerotic plaque and IMT was analyzed.Results The IMT of common carotid artery (CCA), carotid artery bifurcation (CAB)and internal carotid artery (ICA) in MP+ group was significantly higher than that in MP- group [ (1.02±0.36)mm vs (0.86±0.22) mm, (1.14±0.39 ) mm vs(0.96±0.26) mm, (0.94±0.30 )mm vs ( 0.82±0.18 mm ), P<0.05 ]. The ratio of carotid atherosclerotie plaque in MP+ group was significantly higher than that in MP- group (64.5% vs 42.4%,P<0.05). Conclusions The MBPS is related to carotid atheroselerotie plaque and the carotid IMT. The MBPS may accelerate the forming and developing of atherosclerosis.