ObjectiveTo determine the levels of 8-iso-prostaglandin F2α (PGF2α) in sera and lesions as well as antioxidant capacity in sera of psoriatic patients,and to assess their correlations with disease severity.MethodsSerum and skin tissue samples were collected from 15 healthy controlsand 50 patients with psoriasis vulgaris.Spectrophotometry was performed to determine the levels of total antioxidant capacity (T-AOC) and the activities of antioxidant enzymes such as superoxide dismutase (SOD),catalase (CAT) and glutathione peroxidase (GSH-Px) in serum samples.Enzyme-linked immunosorbent assay (ELISA) and immunohistochemical SP method were carried out to detect the expression level of 8-iso-PGF2α in the serum and tissue specimens respectively.ResultsThe psoriatic patients showed a significant decrease in the serum level of TAOC((12.78 ± 7.75) U/ml vs. (23.17 ± 8.81) U/ml,P＜ 0.01) as well as the activities of SOD((28.91 ±9.35) U/ml vs.(51.36 ± 7.92) U/ml,P＜ 0.01) and GSH-Px ((180.64 ± 47.70) U vs.(244.20 ± 66.68) U,P ＜ 0.01 ) compared with the healthy controls.The serum T-AOC level and SOD activity were lower in patients with severe psoriasis than those with mild or moderate psoriasis ((9.06 ± 5.30) U/ml vs. (15.27 ± 8.18) U/ml,(21.63 ± 5.28) U/ml vs. (33.76 ± 8.28) U/ml,both P＜ 0.01 ),while there was no significant difference in the activity of GSH-Px between patients with severe and mild or moderate psoriasis.The serum CAT activity was significantly higher in patients with mild or moderate psoriasis than in the healthy controls and patients with severe psoriasis ( (36.92 ± 11.31 ) U/ml vs.( 28.55 ± 8.51 ) U/ml and (24.15 ± 9.36 ) U/ml,P ＜ 0.05 and 0.01 ).Increased serum and lesional 8-iso-PGF2α levels were observed in psoriatic patients compared with the healthy controls ( (88.77 ± 25.27) ng/L vs.(38.34 ± 8.94) ng/L,0.0186 ± 0.0082 vs.0.0027 ± 0.0014,both P ＜ 0.01),as well as in patients with severe psoriasis compared with those with mild or moderate psoriasis(( 114.24 ±13.93) ng/L vs.(71.78 ± 14.35) ng/L,0.0279 ± 0.0027 vs.0.0125 ± 0.0030,both P＜ 0.01 ).The psoriasis area and severity index(PASI) score was negatively correlated with T-AOC level,SOD and CAT activities(r =-0.384,-0.573 and -0.444,all P ＜ 0.01 ),positively correlated with serum and lesional 8-iso-PGF2α levels (r =0.710,0.783,both P ＜ 0.01 ),and uncorrelated with GSH-Px activity.None of the parameters was correlated with the course of disease.ConclusionThe serum and lesional levels of 8-iso-PGF2α may be a more sensitive marker for oxidative damage and disease severity.

Objective To observe the effect of Jiaotai Pills ( JP) on hypothalamic neurotransmitters of Orexin A and gamma-aminobutyric acid ( GABA) in rapid eye movement ( REM) sleep deprivation rats. Methods Rat model of REM-sleep deprivation was established by water small platform method. The rats were randomized into 6 groups, namely normal control group, model group, Diazepam group (3 mg/kg), and high-, medium-and low-dose JP groups ( JP in the dosage of 18.6, 9.3 and 4.6 g/kg respectively) . Enzyme-labeled instrument was used to detect the absorbance ratio of rat hypothalamic Orexin A content, and high performance liquid phase electrochemical detection method was adopted for the detection of hypothalamic GABA content. Results Compared with the normal control group, all of the rats in the model group suffered from insomnia, and the Orexin A content was increased ( P<0.05) . Compared with the model group, insomnia in rats of high-, medium- and low-dose JP groups was markedly relieved, and Orexin A was decreased (P<0.05) . The difference of GABA was insignificant between model group and JP groups (P>0.05) . Conclusion The sedative and hypnic mechanism of JP is probably related with the inhibition of hypothalamic Orexin A.

Objective To provide authors with more quality services,so as to improve management efficiency,reduce management time and manpower cost,ultimately achieve the expected delicacy management of scientific papers.Methods Indicators of traditional management pattern and "double track parallel" management mode of the scientific papers management process were compared through retrospective study.Such indicators include authors' operation,data error rate,average working cycle,management cost,user experience,data barriers,self-management consciousness and others.Resuits Significant improvements were shown in the data accuracy,management cost savings,user satisfaction,and data sharing in the "double track parallel" management model.Conclusions 5 years of practice demonstrated that the "double track parallel" management model not only effectively connects hospital policy and technical method,but also solves the key problems of data barriers,disjointed management and low efficiency.Scientific paper management is expected to be more refined and effective.

OBJECTIVE: To investigate the association of myocardial blood flow (MBF) quantified by dynamic computed tomography (CT) myocardial perfusion imaging (MPI) with troponin level and left ventricle (LV) function in patients with ST-segment elevated myocardial infarction (STEMI). MATERIALS AND METHODS: Thirty-five STEMI patients who successfully had undergone reperfusion treatment within 1 week of their infarction were consecutively enrolled. All patients were referred for dynamic CT-MPI. Serial high-sensitivity troponin T (hs-TnT) levels and left ventricular ejection fraction (LVEF) measured by echocardiography were recorded. Twenty-six patients with 427 segments were included for analysis. Various quantitative parameters derived from dynamic CT-MPI were analyzed to determine if there was a correlation between hs-TnT levels and LVEF on admission and again at the 6-month mark. RESULTS: The mean radiation dose for dynamic CT-MPI was 3.2 ± 1.1 mSv. Infarcted territories had significantly lower MBF (30.5 ± 7.4 mL/min/100 mL versus 73.4 ± 8.1 mL/min/100 mL, p < 0.001) and myocardial blood volume (MBV) (2.8 ± 0.9 mL/100 mL versus 4.2 ± 1.1 mL/100 mL, p = 0.044) compared with those of reference territories. MBF showed the best correlation with the level of peak hs-TnT (r = −0.682, p < 0.001), and MBV showed a moderate correlation with the level of peak hs-TnT (r = −0.437, p = 0.026); however, the other parameters did not show any significant correlation with hs-TnT levels. As for the association with LV function, only MBF was significantly correlated with LVEF at the time of admission (r = 0.469, p = 0.016) and at 6 months (r = 0.585, p = 0.001). CONCLUSION: MBF quantified by dynamic CT-MPI is significantly inversely correlated with the level of peak hs-TnT. In addition, patients with lower MBF tended to have impaired LV function at the time of their admission and at 6 months.
Blood Volume ; Echocardiography ; Heart Ventricles ; Humans ; Infarction ; Myocardial Infarction ; Myocardial Perfusion Imaging ; Reperfusion ; Stroke Volume ; Troponin T ; Troponin

Objective To make good use of the incentive function of the reward policy of scientific research achievements in hospitals ,shorten the reward cycle of scientific and technological achievements ,reduce the management cost ,achieve the ul-timate goal of details management of scientific and technological achievements .Methods Through retrospective analysis of the incentive process to identify possible barriers ,reconstruct the rewarding procedures of scientific and technological achievements by bringing in informatization and publicity strategy ,compare the bonus distribution cycle with the traditional model .Results The results show that the reward model based on the scientific research management system reduces the bonus arrival waiting period by about 62％ ,saves management costs and improves staff compliance .Conclusions According to the 4-year practice experiences ,the new management model has further released the positive impact of the hospital award policy ,solved the key problem of restricting the rewarding effect by technological means in the process of rewarding scientific research achievements .

OBJECTIVE: To assess the feasibility of calcification characterization by coronary computed tomography angiography (CCTA) to predict the use of rotational atherectomy (RA) for coronary intervention of lesions with moderate to severe calcification. MATERIALS AND METHODS: Patients with calcified lesions treated by percutaneous coronary intervention (PCI) who underwent both CCTA and invasive coronary angiography were retrospectively included in this study. Calcification remodeling index was calculated as the ratio of the smallest vessel cross-sectional area of the lesion to the proximal reference luminal area. Other parameters such as calcium volume, regional Agatston score, calcification length, and involved calcium arc quadrant were also recorded. RESULTS: A total of 223 patients with 241 calcified lesions were finally included. Lesions with RA tended to have larger calcium volume, higher regional Agatston score, more involved calcium arc quadrants, and significantly smaller calcification remodeling index than lesions without RA. Receiver operating characteristic curve analysis revealed that the best cutoff value of calcification remodeling index was 0.84 (area under curve = 0.847, p < 0.001). Calcification remodeling index ≤ 0.84 was the strongest independent predictor (odds ratio: 251.47, p < 0.001) for using RA. CONCLUSION: Calcification remodeling index was significantly correlated with the incidence of using RA to aid PCI. Calcification remodeling index ≤ 0.84 was the strongest independent predictor for using RA prior to stent implantation.
Angiography ; Atherectomy, Coronary* ; Calcium ; Coronary Angiography ; Humans ; Incidence ; Percutaneous Coronary Intervention ; Phenobarbital ; Retrospective Studies ; ROC Curve ; Stents

OBJECTIVE: To assess the feasibility of calcification characterization by coronary computed tomography angiography (CCTA) to predict the use of rotational atherectomy (RA) for coronary intervention of lesions with moderate to severe calcification. MATERIALS AND METHODS: Patients with calcified lesions treated by percutaneous coronary intervention (PCI) who underwent both CCTA and invasive coronary angiography were retrospectively included in this study. Calcification remodeling index was calculated as the ratio of the smallest vessel cross-sectional area of the lesion to the proximal reference luminal area. Other parameters such as calcium volume, regional Agatston score, calcification length, and involved calcium arc quadrant were also recorded. RESULTS: A total of 223 patients with 241 calcified lesions were finally included. Lesions with RA tended to have larger calcium volume, higher regional Agatston score, more involved calcium arc quadrants, and significantly smaller calcification remodeling index than lesions without RA. Receiver operating characteristic curve analysis revealed that the best cutoff value of calcification remodeling index was 0.84 (area under curve = 0.847, p < 0.001). Calcification remodeling index ≤ 0.84 was the strongest independent predictor (odds ratio: 251.47, p < 0.001) for using RA. CONCLUSION: Calcification remodeling index was significantly correlated with the incidence of using RA to aid PCI. Calcification remodeling index ≤ 0.84 was the strongest independent predictor for using RA prior to stent implantation.
Angiography ; Atherectomy, Coronary* ; Calcium ; Coronary Angiography ; Humans ; Incidence ; Percutaneous Coronary Intervention ; Phenobarbital ; Retrospective Studies ; ROC Curve ; Stents

OBJECTIVE: To study the predictive value of transluminal attenuation gradient (TAG) derived from diastolic phase of coronary computed tomography angiography (CCTA) for identifying systolic compression of myocardial bridge (MB). MATERIALS AND METHODS: Consecutive patients diagnosed with MB based on CCTA findings and without obstructive coronary artery disease were retrospectively enrolled. In total, 143 patients with 144 MBs were included in the study. Patients were classified into three groups: without systolic compression, with systolic compression < 50%, and with systolic compression ≥ 50%. TAG was defined as the linear regression coefficient between intraluminal attenuation in Hounsfield units (HU) and length from the vessel ostium. Other indices such as the length and depth of the MB were also recorded. RESULTS: TAG was the lowest in MB patients with systolic compression ≥ 50% (−19.9 ± 8.7 HU/10 mm). Receiver operating characteristic curve analysis was performed to determine the optimal cutoff values for identifying systolic compression ≥ 50%. The result indicated an optimal cutoff value of TAG as −18.8 HU/10 mm (area under curve = 0.778, p < 0.001), which yielded higher sensitivity, specificity, positive predictive value, negative predictive value, and diagnostic accuracy (54.1, 80.5, 72.8, and 75.0%, respectively). In addition, the TAG of MB with diastolic compression was significantly lower than the TAG of MB without diastolic compression (−21.4 ± 4.8 HU/10 mm vs. −12.7 ± 8 HU/10 mm, p < 0.001). CONCLUSION: TAG was a better predictor of MB with systolic compression ≥ 50%, compared to the length or depth of the MB. The TAG of MB with persistent diastolic compression was significantly lower than the TAG without diastolic compression.
Angiography ; Coronary Artery Disease ; Humans ; Linear Models ; Myocardial Ischemia ; Retrospective Studies ; ROC Curve ; Sensitivity and Specificity

OBJECTIVE: To investigate the morphological changes of coronary chronic total occlusion (CTO) as determined by coronary computed tomography angiography (CCTA) follow-up using semi-automated quantitative analysis. MATERIALS AND METHODS: Thirty patients with 31 CTO lesions confirmed by invasive coronary angiography and baseline/follow-up CCTA were retrospectively included. CTOs were quantitatively analyzed by a semi-automated coronary plaque analysis software (Coronary Plaque Analysis, version 2.0, Siemens) after manually determining the lesion border. Recanalized lumen was defined as the linear-like enhanced opacity traversing the non-opacified occluded segment. Other parameters, such as total occlusion length, total occlusion volume, volume with low attenuation component (< 30 Hounsfield unit [HU]), volume with middle to high attenuation component (30–190 HU) as well as the calcification volume, were also recorded. RESULTS: Recanalized lumen was found within 48.4% (15/31) occlusions on the follow-up CCTA, compared to 45.2% (14/31) occlusions on the baseline CCTA. Eleven of 14 lesions (78.6%) with CT-visible recanalized lumen within CTOs had a shorter occlusion length on follow-up compared to only 3 of 17 lesions (17.6%) without CT-visible recanalized lumen (odds ratio, 17.1, p < 0.001). The percentage of low attenuation component of occlusions was smaller on follow-up CCTA compared to baseline value (18.1 ± 20.1% vs. 22.6 ± 19.6%, p = 0.033). CONCLUSION: Coronary computed tomography angiography enables non-invasive characterization of natural progression of untreated CTO lesions. Recanalized lumen within CTOs observed at baseline CCTA was associated with shortening of occlusion length on follow-up. Compared to their earlier stage, occlusions of later stage were presented with higher density of non-calcified components.
Angiography* ; Coronary Angiography ; Follow-Up Studies* ; Humans ; Natural History* ; Percutaneous Coronary Intervention ; Retrospective Studies

OBJECTIVE: To study the prevalence and clinical characteristics of decreased myocardial blood flow (MBF) quantified by dynamic computed tomography (CT) myocardial perfusion imaging (MPI) in symptomatic patients without in-stent restenosis. MATERIALS AND METHODS: Thirty-seven (mean age, 71.3 ± 10 years; age range, 48–88 years; 31 males, 6 females) consecutive symptomatic patients with patent coronary stents and without obstructive de novo lesions were prospectively enrolled to undergo dynamic CT-MPI using a third-generation dual-source CT scanner. The shuttle-mode acquisition technique was used to image the complete left ventricle. A bolus of contrast media (50 mL; iopromide, 370 mg iodine/mL) was injected into the antecubital vein at a rate of 6 mL/s, followed by a 40-mL saline flush. The mean MBF value and other quantitative parameters were measured for each segment of both stented-vessel territories and reference territories. The MBFratio was defined as the ratio of the mean MBF value of the whole stent-vessel territory to that of the whole reference territory. An MBFratio of 0.85 was used as the cut-off value to distinguish hypoperfused from non-hypoperfused segments. RESULTS: A total of 629 segments of 37 patients were ultimately included for analysis. The mean effective dose of dynamic CT-MPI was 3.1 ± 1.2 mSv (range, 1.7–6.3 mSv). The mean MBF of stent-vessel territories was decreased in 19 lesions and 81 segments. Compared to stent-vessel territories without hypoperfusion, the mean MBF and myocardial blood volume were markedly lower in hypoperfused stent-vessel territories (77.5 ± 16.6 mL/100 mL/min vs. 140.4 ± 24.1 mL/100 mL/min [p < 0.001] and 6.4 ± 3.7 mL/100 mL vs. 11.5 ± 4 mL/100 mL [p < 0.001, respectively]). Myocardial hypoperfusion in stent-vessel territories was present in 48.6% (18/37) of patients. None of clinical parameters differed statistically significantly between hypoperfusion and non-hypoperfusion subgroups. CONCLUSION: Decreased MBF is commonly present in patients who are symptomatic after percutaneous coronary intervention, despite patent stents and can be detected by dynamic CT-MPI using a low radiation dose.
Angiography ; Blood Volume ; Contrast Media ; Coronary Artery Disease ; Heart Ventricles ; Humans ; Male ; Multidetector Computed Tomography ; Myocardial Perfusion Imaging ; Percutaneous Coronary Intervention ; Prevalence ; Prospective Studies ; Stents ; Veins