Objective To investigate the effects of ovariectomy and cholesterol rich diet on the change of estrogen receptor content of vascular endothelial cells and hearts of female rats. Methods The receptor binding assay (RBA) was adopted to measure the content of estrogen receptors, and the serum levels of estradiol and lipids were measured. Results The content of ER was much lower in hearts and VEC of ovariectomy〔(0.51?0.09) fmol/mg pro,(6.73 ? 0.52) fmol/106 cell〕and cholesterol rich rats〔(0.97?0.12) fmol/mg pro,(9.15 ?0.53) fmol/106 cell〕than pseudo-operation rats 〔(2.08?0.15) fmol/mg pro ,(17.66?1.26) fmol/106 cell , P

Objective To observe the onset of vascular smooth muscle cell (VSMC) senescence induced by tert-butyl hydroperoxide (t-BHP) and the intervention effect of dehydroepiandrosterone (DHEA). Methods The VSMCs were divided into four groups: blank control group, t-BHP group (incubated with 80 μmol/L t-BHP for 72 h), 10 nmol/L DHEA intervention group (pretreated with 10 nmol/L DHEA 30 min before t-BHP) and 100 nmol/L DHEA intervention group (pretreated with 100nmol/L DHEA 30 min before t-BHP). Two ageing markers of ageing associated β-galactosidase activity and cell proliferation activity were adopted as main indexes. β-galactosidase activity was measured with immunocytochemical method and cell proliferation activity was measured with flowcytometry. Results After continuous treatment with 80 mmol/L t-BHP for 72 h, the ratios of G0/G1 phase cells and SA-β-galactosidase staining positive cells increased as compared with blank controlgroup [(89.4±3.4)% vs. (49.5±5.5)%, (3.5±1.2)% vs. (75.3±4.3)%], which indicated that VSMCs senescence were successfully induced by t-BHP. While the above changes were smaller in 100 nmol/L DHEA intervention group than in t-BHP group. Conclusions With ageing,accumulation of damage produced by reactive oxygen species may be an important mechanism causing the onset of VSMCs senescence. DHEA may be able to retard the progression of VSMCs senescence through antioxidant effect.

Objective To investigate the relationship between CYP2J2*7 mutation(G-76T) and coronary heart disease (CHD) in Chinese Hanpopulation and to study the effects of CYP2J2 geneover-expressionon the proliferation and migrationof aortic smooth muscle cells of ApoE-/- mice. Methods CYP2J2*7 genotype was detectedin 500 patients with CHD and 478 controlsubjects by the Polymerase Chain Reaction-Restriction Frag-ment Length Polymorphism (PCR-RFLP). Culturedaortic smooth muscle cells of ApoE-/- mice were divided into control group, sham transfectiongroup and CYP2J2 over-expression group. Cell proliferation and migration were investigated after CYP2J2 over-expressionby MTS and Transwell assay. Results The frequency of CYP2J2*7 in CHD group was significantly higher than that incontrol group (10.00% vs. 6.49%, P = 0.046). Same is the case in female cases(P = 0.026). Compared with these of aortic smooth muscle cells incontrol group and sham trans-fectiongroup, the cell proliferation in 24, 48, 72 h, and the cell migration in 48 h after CYP2J2 over-expression in CYP2J2 group were significantly suppressed. Conclusions CYP2J2*7 mutation might increase the risk of CHD in Chinese Han population. CYP2J2 over-expression can suppress the proliferation and migration of aortic smooth muscle cells and CYP2J2 might have the effect of anti-atherosclerosis.

Objective To explore the association of resting heart rate (RHR) and coronary artery lesions with left ventricular function in coronary heart disease for secondary prevention of this disorder.Methods We collected data on 239 patients with coronary heart disease confirmed by coronary angiography or coronary CTA examination in Military General Hospital of Guangzhou Command from January 2016 to August 2017.The clinical data and results of selective coronary angiography were studied.According to baseline RHR,the patients were divided into 4 groups with RHR ＜ 60 min (group A,32 cases),60 to 69 min (group B,60 cases),70 to 79 min (group C,68 cases),and ≥ 80 min (group D,79 cases) for analyzing the relationship of RHR with coronary artery lesions and left ventriculai function,and investigating the association of RHR and left ventricular indexes with severity of coronary artery lesions by ordinal Logistic regression analysis.Results Coronary artery lesions differed significantly among the 4 groups (P ＜ 0.05).the difference of LVDs、LVDd、LAs and EF was statistically significant (P ＜ 0.05),but there was no difference of LAd (P ＞ 0.05).Smoking、diabetes、the index of EF and LVDs were found to correlate with the degree of coronary lesion by Logistic regression analysis (P ＜ 0.05).Conclusions RHR can affect the severity of coronary artery disease and left ventricular function in patients with coronary heart disease,and good control of RHR is beneficial for the prognosis of patients with coronary heart disease.Smoking、diabetes、the index of EF and LVDs were found to correlate with the degree of coronary lesion by Logistic regression analysis (P ＜ 0.05).

Objective To explore the anatomic positional relationship of bronchial artery(BA)with esophagus and main bronchus on 320-detector CTA.Methods Original and post-processed images of 142 patients were observed.Type,origin,opening direction of BA as well as its concomitant relationship with esophagus were recorded.The positional relationship of BA with main bronchus was also recorded by fusing the images of BA and bronchial tree together.Results In 122 patients,273 BA were identified (146 on the right and 127 on the left).Right BA mainly ran simultaneously along the right and posterior edge of the esophagus (49.3%),while left BA mainly ran far gradually on the left side of the esophagus (82.7%).The left and right BA mainly ran along the middle thoracic esophagus, accounting for 58.3% and 42.5% respectively.45.2% of the right BA ran across the posterior edge of the right main bronchus and 60.6% of left BA ran simultaneously on the posterior and up edge of the esophagus.The most dividing direction of BA from the tho-racic aorta was 9 to 12 o’clock with a frequency of 74.2%.Conclusion The concomitant relationship with esophagus of the BA and the positional relationship with main bronchus of the BA could clearly be demonstrated on 320-detector CTA,thus providing availa-ble information and help for pulmonary and mediastinal sugery.

OBJECTIVETo investigate the impact of establishing regional collaborative network on reperfusion time and prognosis of patients with ST-segment elevated myocardial infarction (STEMI) admitting to community hospitals without percutaneous coronary intervention (PCI) capacity (Non-PCI hospital).

METHODSA regional collaborative network was developed, consisting of a PCI center and over 30 Non-PCI hospitals and connected by a tele-transmitted real-time 12-lead electrocardiogram system. This system enables the cardiologists on duty in PCI center to help the physicians in the Non-PCI hospitals (network hospital) to confirm the diagnosis and choose a reperfusion strategy for STEMI patients. All cardiologists in PCI center and physicians in Non-PCI hospitals were trained to follow the flowchart of reperfusion strategies for STEMI patients to shorten the reperfusion time. The mean time from door of Non-PCI hospital to needle of thrombolysis (D-to-N), the mean time from door of PCI center to balloon (D-to-B) and the mean time from the first medical contact to balloon (FMC-to-B) and the 1-year mortality were compared between the 20 months before and the 20 months after establishment of the regional collaborative network for patients with the first medical contact in three network hospitals.

RESULTSAfter establishment of the regional collaborative network, the mean D-to-N time was significantly shortened from (71 ± 62) min to (28 ± 9) min (P < 0.05), the rate of D-to-N below 30 min was increased from 11% (2/18) to 74% (26/35); the mean FMC-to-B and the mean D-to-B time were remarkably reduced in both complementary percutaneous coronary intervention and transfer percutaneous coronary intervention patients (all P < 0.05), the 1-year mortality post reperfusion was reduced from 15.1% (8/53) to 7.0% (10/142) (P < 0.05).

CONCLUSIONThe establishment of regional collaborative network could shorten the perfusion time and reduce the 1-year mortality for STEMI patients presenting to Non-PCI hospitals.

Angioplasty, Balloon, Coronary ; Electrocardiography ; Hospitalization ; Hospitals, Community ; Humans ; Myocardial Infarction ; mortality ; therapy ; Myocardial Reperfusion ; Patient Transfer ; Percutaneous Coronary Intervention ; Prognosis ; Time Factors