To investigate the changes in nitric oxide (NO) and angiotensin (AⅡ) in rat with spontaneous hypertension (SHR) and the effect of benazepril on production of NO/AⅡ. The animals were divided into three groups: normotensive (WKY) group, SHR control group and benazepril group. Blood pressure was measured by the tail-cuff method. NO - 3 concentration in serum was assayed by activated cadmium reduction method; cGMP and AⅡ levels in vascular tissue were assayed by RIA (radioimmunoassay). The results showed that blood NO - 3 concentration and vascular cGMP level were all lower in SHR group compared with WKY rats(P

Objective To investigate the relationship between of the serum homocysteine (Hcy) level and the occurrence and severity of diseased coronary arteries in patients. Methods The total serum Hcy content was determined in sixty-seven patients with diseased coronary arteries and forty-three normal subjects. They were all subjected to coronary artery angiography for evaluation. Using the Gensini's scoring system the degree of severity of of pathology the coronary arteries were assessed. Other risk factors were analyzed in addition to Hcy and Gemini's scores. Results The total serum level of Hcy in patients with diseased coronary artery was significantly higher compared with the normal controls (P

ObjectiveTo investigate the mechanism on endothelial dysfunction of spontaneous hypertensive rats (SHR).MethodsThe animals were divided into two groups: SHRs (n=8) and Wistar-Kyoto (WKY) rats (n=7) all aged 17 months. Blood pressure was measured by the tail-cuff method. NO3- concentration in serum was assayed by activated cadmium reduction method; endothelin (ET) and cGMP levels were assayed by RIA.ResultsCompared with WKY rats, blood NO3- concentration, ET level and vascular cGMP level of SHRs were all reduced significantly (P<0.01); vascular ET level was only uplifted slightly with no significant difference (P>0.05).ConclusionIt indicates that the vascular endothelial dysfunction in SHR is induced possibly by a diminished synthesis or release of NO, not by changes of ET level.

Background and objective The value of D-dimer in the risk stratification of patients with coronary artery diseas(CAD)and the relationship between D-dimer and the diseased coronary arteries remains controversial or unclear.especially in the elderly.Thisstudy was to evaluate the usefulness of D-djmer as a biomarker in assessing the vuinerable blood in the elderly patients with coronarydisease.Methods Sixty elderly (≥60 years old)male patients with suspected CAD were enrolled in this prospective study.Patients were divided into CAD group(n=41,10 with stable angina and 31 with unstable angina)and control group(n=19)according to their coronary angiography Results Clinicalinformation including age,body mass index(BMI),smoking index,and thecomplications of Primary hypertension or diabetes.and CAD family history was collected.Venous blood was sampled serially for thedetermination of total cholesterol,HDL cholesterol,LDL cholesterol,triglycerides,apoAl,apoB,glucose,uric acid,homocysteine(Hey),hs-CRP,soluble thrombomodulin(sTM),and marker of fibrinolytic system and hypercoagulability,such as D-dimer,fibrinogen,etc.The extent of coronary atherosclerosis was assessed.using the Gensini scoring system on the basis of coronary angiography.Results Compared with the controls.the patients with CAD had significantly higher levels of D-dimer.D-dimer level wassignificantly correlated to age.hs-CR P.Hcy,and PAI-1.Patients with D-dimer levels in the top triplicate of D-dimer level hadsignificantly higher prevalence of unstable angina compared with patients in the lowest triplicate(OR=4.8,Z=3.28,P=0.001).In anordinal logistic regression.the OR value ofdeveloping more serious CAD augmented 3.1-foid with each increasing triplicate of D-dimer.Patients with unstable angina had a significantly higher level of D-dimer than the controls(P=0.005),and an increasing trend comparedwith patients with stable angina (P=0.059).whereas there was no difference between the patients with stable angina and the controls(P=0.885).D-dimer was significantly correlated with Gensini scores(r=0.3930,P=0.0019).Ordinal logistic regression showed that theOR value ofincreasing one or two triplicates of Gensini's scores augmented 1.44.fold with each increasing triplicate of D-dimer(OR=2.44,Z=2.87,P=0.004). Conclusions D-dimer may be a helpful biomarker in identifying the severity of vulnerable blood in elderlypatients with CAD.

Objective:To explore the status and correlates of sleep quality in hospitalized patients with schizophrenia.Methods:A total number of 269 schizophrenia inpatients were recruited from 7 hospitals including Peking University Sixth Hospital, Zhumadian Second People′s Hospital and Liaocheng Fourth People′s Hospital from August 2019 to March 2021. The Brief Psychiatric Rating Scale (BPRS), the Pittsburgh Sleep Quality Index (PSQI), the 9-item Patient Health Questionnaire (PHQ-9), the 7-item Generalized Anxiety Disorder Scale (GAD-7) and the suicide module of Mini-International Neuropsychiatric Interview were evaluated. Poor sleep quality was determined by the score of more than 5 according to PSQI, all patients were divided into groups of poor and normal sleep quality. The general demographic data and clinical characteristics of two groups were compared, and the correlates of sleep quality were obtained by Spearman correlations and multiple logistic regression.Results:The prevalence of poor sleep quality in schizophrenia inpatients was up to 44.6% (120/269). Compared with normal sleep quality group, inpatients with poor sleep quality had higher rates of alcohol consumption history, use of benzodiazepines (BZDs) and current suicide risk, and BPRS total score, factor scores (thinking disorders, anxious-depression, hostile-suspiciousness and activation), PHQ-9 and GAD-7 scores were also higher (all P<0.05). Spearman correlation analyses showed that PSQI total score were significantly positively correlated with BPRS total score ( r=0.323), PHQ-9 score ( r=0.553), GAD-7 score ( r=0.456) and current suicide risk level ( r=0.320) (all P<0.001). Multiple logistic regression showed that history of alcohol consumption ( OR=2.897, 95% CI: 1.002-8.372), use of BZDs ( OR=3.181, 95% CI: 1.548-6.534), thinking disorders ( OR=1.563, 95% CI: 1.015-2.406), comorbidity with depression ( OR=4.968, 95% CI: 1.869-13.202), and current suicide risk ( OR=2.496, 95% CI: 1.360-4.581) were independently correlated with poor sleep quality (all P<0.05). Conclusion:Poor sleep quality is common in hospitalized patients with schizophrenia, and history of alcohol consumption, use of BZDs, thinking disorders, comorbidity with depression and current suicide risk are independent correlates of poor sleep quality.