The pharmacodynamics of prostaglandin E1 (PGE1) administered by different routes to rats was investigated in this paper. The hypotensive effect of PGE1 was used as an index of drug efficacy, pharmacodynamic parameters such as time to reach peak effect (Tmax), maximal percentage of blood pressure decrease (Emax, %), duration of effect (Td), and the area determined after PGE1 given to rats intranasally, sublingually, intraperitoneally (ip),and intramuscularly (im), separately, and compared with those obtained from intravenous (iv) administration. Similar to iv route, the pharmacodynamic parameters of PGE1 from the other administration routes, Emax, Td and in particular AUC values were all increased with increasing doses, showing dose-efficacy relationship. Tmax was found to be approximately 3-4 min for nasal route, 3-8 min for im, 6-8 min for ip and 12-30 min for sublingual route, separately. Thus, the order of magnitude of absorption rate of the drug was as follows: nasal≈im＞ip＞sublingual. If the pharmacological bioavailability (PF) for each administration route was used as a tentative measure of drug absorption extent, the order of magnitude of absolute bioavailability appeared as follows: nasal＞im≈ip＞sublingual. Furthermore, the interindividual difference was found to be larger for im and ip route than that for nasal and sublingual route. These results indicate nasal and sublingual routes are two promising routes for the systemic delivery of PGE1 in clinical applications.

Objective: To observe influence of different risk factors on prognosis of patients with coronary heart disease (CHD) and normal myocardial perfusion imaging outcome.Methods: A total of 99 CHD patients with normal myocardial perfusion imaging outcome were selected.Left ventricular function indexes were measured by gated resting myocardial imaging in resting and stress state.All patients received telephone follow-up until natural death (died of other causes) or fatal or non-fatal heart attacks, or the termination of the experiment after 45 months.Cox proportion risk regression model was used to analyze risk factors of fatal and non-fatal heart attacks.Results: A total of 15 cases died during the 45-month follow-up.Mean all-cause mortality per year was 5.05%.Fatal heart attacks occurred in nine cases (9.09%), and non-fatal heart attacks occurred in 21 cases (21.21%).Cox proportion risk regression analysis indicated that smoking and left ventricular ejection fraction (LVEF) <50% were risk factors for fatal heart attacks (HR=4.887, 3.365, P=0.043, 0.002), while diabetes mellitus, dyslipidemia, smoking and LVEF<50% were risk factors for non-fatal heart attacks (HR=2.215~4.544, P<0.05 all).Conclusion: Incidence rate of cardiovascular events is higher in CHD patients with normal myocardial perfusion imaging.Smoking and impaired heart function suggest poor prognosis in these patients.

Objective To evaluate the effectiveness of immediate quantitative coronary angiography (QCA) analysis in percutaneous coronary intervention (PCI). Methods The parameters of QCA and conventional methods before and after PCI were compared and statistics was performed by using t test or ANOVA methods. Results One hundred and two patients were enrolled in our study. Significant differences between QCA and conventional methods were found in evaluation of lesion length [ ( 22.9 ± 8.9 ) mm vs (24. 8 ± 10. 6) mm,t = 9. 63, P < 0. 05 ], stenosis diameter [ (3.0 ± 0.4 ) mm vs (2. 9 ± 0. 7) mm, t = 6. 31, P < 0. 05 ] and stenosis area [ ( 87. 8 ± 10. 7 ) mm2 vs ( 85.0 ± 12.9 ) mm2, t = 2. 54, P < 0.05 ], and also in different vessels. Stenosis diameter and stenosis area after stenting in target lesion were lower than the international standards. Conclusion Immediate QCA analysis can be effective in directing stent implantation.

ObjectiveTo investigate the effect of n-butanol extract from Potentilla anserina (NP) intervention on hypoxia-induced Ca2+ overload and SERCA2 expression of rat cardiomyocytes.MethodsPrimary cultured myocardial cell from SD neonatal rat (1-3 d) was used in the establishment of hypoxia model.After hypoxia for 3 h,the Ca2+ concentration of myocardial cells was measured with fura-2/AM fluorescent probe,and the biochemical indicator intracellular Ca2+-ATPase was examined and the mRNA and its protective protein levels of the sarcoplasmic reticulum (SR) Ca2+-ATPases (SERCA2) were assayed with RT-PCR,Western-blotting,and immune-cytochemical staining in each group.ResultsThe results showed that NP decreased Ca2+ concentration,increased the activity of Ca2+-ATPase,and improved the mRNA and protein expression of SERCA2 in hypoxia-injured myocardial cells as compared with the model group.ConclusionThese results indicate that NP could attenuate the Ca2+ overload.The mechanism might be explained as that NP could elevate the SERCA2 level,increase the activity of myocardium in rats,and further enhance the capacity of SR Ca2+ re-uptake.

Objective:To observe the relationship between dynamic blood pressure variability (BPV) and left ventric‐ular diastolic function in patients with essential hypertension (EH) .Methods :A total of 140 newly diagnosed EH pa‐tients were selected .According to total coefficient of variation (CV) of 24h systolic blood pressure BPV ,they were divided into high CV group (n=70 ,CV>12.16% ) and low CV group (n=70 ,CV≤12.16% ) .Another 70 healthy subjects with corresponding gender and age were enrolled as healthy control group simultaneously .Echocardiography was used to measure mitral early diastolic peak flow velocity (E) ,late diastolic peak flow velocity (A) and decelera‐tion time of E peak (DT);meanwhile ,tissue Doppler mode was used to record early diastolic peak velocity (Em) and late diastolic peak velocity (Am) .All above indexes were compared among all groups .Results:Compared with healthy control group ,BPV significantly rose in EH patients (P<0.05 or < 0.01) .All BPV indexes in high CV group were significantly higher than those of low CV group except daytime mean diastolic blood pressure variability (dDBP‐BPV) and nighttime mean diastolic blood pressure variability (nDBP‐BPV) , P<0.05 all .Compared with healthy control group ,there were significant reductions in E and Em/Am ,and significant rise in DT and E/Em in EH patients ,P<0.05 or <0.01 ;compared with low CV group ,there was significant rise in E/Em [(10.32 ± 3.20) vs .(14.22 ± 2.20) ,P=0.033] in high CV group .Conclusion:Left ventricular diastolic dysfunction is more severe in hypertensive patients with higher dynamic blood pressure variability .

Purpose: Although obesity is associated with numerous diseases, the risks of disease may depend on metabolically healthy status. Nevertheless, it is unclear to whether metabolically healthy status affects risk of gastrointestinal (GI) cancer in general Chinese population. Materials and Methods: A total of 114,995 participants who met the criteria were included from the Kailuan Study. The study participants were divided into four groups according to body mass index (BMI)/waist circumference (WC) and metabolic status. Incident of GI cancer (esophageal cancer, gastric cancer, liver cancer, biliary cancer, pancreatic cancer, and colorectal cancer) during 2006-2020 were confirmed by review of medical records. The Cox proportional hazard regression models were used to assess the association metabolically healthy status with the risk of GI cancer by calculating the hazard ratios (HR) and 95% confidence interval (CI). Results: During a mean 13.76 years of follow-up, we documented 2,311 GI cancers. Multivariate Cox regression analysis showed that compared with the metabolically healthy normal-weight group, metabolically healthy obese (MHO) participants demonstrated an increased risk of developing GI cancer (HR, 1.54; 95% CI, 1.11 to 2.13) by BMI categories. However, such associations were not found for WC category. These associations were moderated by age, sex, and anatomical site of the tumor. Individuals with metabolic unhealthy normal-weight or metabolic unhealthy obesity phenotype also have an increased risk of GI cancer. Conclusion MHO phenotype was associated with increased risk of GI cancer. Moreover, individuals who complicated by metabolic unhealthy status have an increased risk of developing GI cancer. Hence, clinicians should consider the risk of incident GI cancer in people with abnormal metabolically healthy status and counsel them about metabolic fitness and weight control.

A case of laryngeal cancer complicated with Hodgkin's lymphoma treated in the Department of Otolaryngology Head and neck surgery of the First Hospital of Jilin University was reported. Under general anesthesia, right vertical partial laryngectomy, bilateral neck lymph node functional dissection and temporary tracheotomy were performed. No recurrence was found in laryngoscope and color Doppler ultrasound of neck lymph nodes 3 and 5 months after operation.
Humans ; Laryngeal Neoplasms/surgery* ; Hodgkin Disease/complications* ; Neck/pathology* ; Neck Dissection ; Lymph Nodes/pathology* ; Laryngectomy ; Carcinoma/pathology*