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Objective:To observe the effects of TCM compounds for eliminating phlegm and removing blood stasis on the ultrastructure of atrial myocardium in atrial fibrillation (AF) rats; To explore its possible mechanism.Methods:Totally 60 male SD rats were divided into blank group (10 rats) and model group (50 rats) according to random number table method. The atrial fibrillation model was established by tail vein injection of ACh-CaCl 2 mixture for 7 consecutive days, and then the rats with successful modeling were divided into model group, verapamil group, TCM compounds high-, medium- and low-dosage groups according to random number table method, with 10 rats in each group. TCM compounds high-, medium- and low-dosage groups were given Chinese herbal decoction 41.25, 20.63, 10.31 g/(kg?d) by gavage, respectively, and the verapamil group was given verapamil solution 25 g/(kg?d). The blank group and the model group were given an equal volume of normal saline by gavage for consecutive 14 days. After 14 consecutive days, electrophysiological recorder was used to measure the duration of atrial fibrillation in each group of rats; the changes of ultrastructure of atrial myocytes in each group were observed under transmission electron microscope; serum ROS, SOD and GSH-Px levels of rats were detected by ELISA. Results:Compared with the model group, the duration of atrial fibrillation in TCM compounds high-, medium- and low-dosage groups and verapamil group decreased ( P<0.05); the ultrastructural damage of atrial myocytes was improved; the content of ROS [(139.20±3.34) ng/ml,(139.00±3.28) ng/ml, (139.25±3.82) ng/ml vs. (155.60±7.32) ng/ml] in TCM compounds high- and medium-dosage groups and verapamil group decreased; the contents of SOD [(2.41±0.26) ng/ml, (2.40±0.12) ng/ml, (2.37±0.06) ng/ml vs.(2.12±0.21) ng/ml] increased ( P<0.05); the content of GSH-Px [(3.61±0.06) ng/ml, (3.60±0.08) ng/ml, (3.47±0.15) ng/ml, (3.51±0.19) ng/ml vs.(3.27±0.12) ng/ml] in TCM compounds high-, medium- and low-dosage groups and verapamil group increased ( P<0.05). Conclusion:TCM compounds for eliminating phlegm and removing blood stasis can shorten the duration of atrial fibrillation in rats, reduce the damage of ultrastructure of atrial myocytes in AF rats, regulate the expressions of serum ROS, SOD and GSH-Px in AF rats, and inhibit oxidative stress, which may be one of its mechanisms of action in the treatment of atrial fibrillation.
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Objective@#To observe the impacts of Xinnaoning capsules on the aortic intimal structure, serum levels of diponectin (APN) and calcium sensing receptor (CaSR) expression in rats with myocardial infarction, and explore the endothelial protection mechanisms of Xinnaoning.@*Methods@#15 male Sprague Dawley (SD) rats in sham operation group were randomly selected from 60 rats, the rest 45 rats were fed with high fat diet for 6 weeks and received coronary artery ligation operation. The successful modeling rats were randomly divided into model group, western medicine group and traditional Chinese medicine(TCM) group, and fed with high fat diet for 8 weeks. The sham operation group fed with normal diet. The western medicine group and TCM group received atorvastatin and Xinnaoning capsules, respectively; the sham operation group and model group received same amount of distilled water. After treatment of 4 weeks, the aortic intimal structure was observed by hematoxylin-eosin (HE); the serum levels of triacylglycerol (TG), total cholesterol (TC), low density lipoprotein (LDL) and high density lipoprotein (HDL) were measured by microplate test; serum levels of APN and CaSR expression were determined by enzyme linked immunosorbent assay (ELISA) and Western blot, respectively.@*Results@#Compared with sham operation group, aortic intimal structure derangement and plaque formation in intima in model group, and serum levels of TG, TC, LDL and CaSR expression were increased; HDL and APN were decreased (P<0.05). Compared with model group, the endarterium was more smooth in the western medicine group and TCM group, serum levels of TG, TC, LDL and CaSR expression were decreased; HDL and APN were increased (P<0.05). And there were no significant differences between western medicine group and TCM group (P>0.05).@*Conclusions@#Xinnaoning capsules are effective for myocardial infarction.
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Objective To observe the impacts of Xinnaoning capsules on the aortic intimal structure,serum levels of diponectin (APN) and calcium sensing receptor (CaSR) expression in rats with myocardial infarction,and explore the endothelial protection mechanisms of Xinnaoning.Methods 15 male Sprague Dawley (SD) rats in sham operation group were randomly selected from 60 rats,the rest 45 rats were fed with high fat diet for 6 weeks and received coronary artery ligation operation.The successful modeling rats were randomly divided into model group,western medicine group and traditional Chinese medicine (TCM) group,and fed with high fat diet for 8 weeks.The sham operation group fed with normal diet.The western medicine group and TCM group received atorvastatin and Xinnaoning capsules,respectively;the sham operation group and model group received same amount of distilled water.After treatment of 4 weeks,the aortic intimal structure was observed by hematoxylin-eosin (HE);the serum levels of triacylglycerol (TG),total cholesterol (TC),low density lipoprotein (LDL) and high density lipoprotein (HDL) were measured by microplate test;serum levels of APN and CaSR expression were determined by enzyme linked immunosorbent assay (ELISA) and Western blot,respectively.Results Compared with sham operation group,aortic intimal structure derangement and plaque formation in intima in model group,and serum levels of TG,TC,LDL and CaSR expression were increased;HDL and APN were decreased (P ＜ 0.05).Compared with model group,the endarterium was more smooth in the western medicine group and TCM group,serum levels of TG,TC,LDL and CaSR expression were decreased;HDL and APN were increased (P ＜0.05).And there were no significant differences between western medicine group and TCM group (P ＞0.05).Conclusions Xinnaoning capsules are effective for myocardial infarction.
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Objective To summarize the experience of diagnosis and treatment of occult spontaneous pneumothorax in young adults.Methods To review and summarize the imaging data and treatment process of 22 cases of occult spontaneous pneumothorax.Results Surgical treatment was performed in 22 patients.Among them,VATS operation in 18 cases,VATMoperation in 4 cases.Operation difficulty was severe adhesion free existed in the apex of lung and pleural top.22 patients with the successful completion of the operation,no major bleeding during the operation,no open chest surgery.1 -3 years follow -up without recurrence.Conclusion Surgical treatment is the first choice for occult spontaneous pneumothorax in young adults.Often due to severe adhesion of the chest,surgery is difficult,the surgeon should be fully prepared before surgery.Patients with good prognosis,due to the difficulty of early diagnosis,clinicians should pay attention to.
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Objective To explore the nursing cooperation in use of lung inflation system for video-assisted thoracoscopic surgery (VATS) for spontaneous pneumothorax. Method The key nursing points in nursing 42 patients with spontaneous pneumothorax undergoing VATS were analyzed. Results The operations were all successful. One patient contracted lower left atelectasis but it was cured after the tracheal tube was re-adjusted. On day one, there were two cases of gas leakage during thoracic closed drainage:one was of diffuse pulmonary bulla, and the gas leakage stopped on the second day; In the other cases, the gas leakage stopped 2 days after the tube was withdrawn by 3cm probably because the drainage tube was inserted too deep at the beginning. 6-30 months follow-ups showed no recurrence of pneumothorax in the operated site. Conclusions The lung inflation system is safe during VATS for spontaneous pneumothorax. Careful preoperative preparation of the equipment and skillful nursing cooperation at all procedures are critical for the success of VATS.
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Objective By investigating the effects of AT1 and ERK2 signaling pathway in CHF,to study the effect of Guanxin-Shutong capsule on AT1,ERK2 expression in rats with chronic heart failure (CHF).Methods The CHF rat models were setup by coronary artery ligation,exhausting swimming and reducing feeding.Divided CHF rat methods into a model group,a lisinopril group,Qi-benefiting with Chinese medicine group,blood activating with Chinese medicine group,Qi benefiting and blood activating with Chinese medicine group(QBBA group) and Guanxin-Shutong capsule group.Rats without left coronary artery ligation were set for sham operated group.Real-time quantitative PCR technique and immunohistochemical method were adopted to detect AT1,ERK2 changes of CHF rats.Results AT1,ERK2 expression increased obviously in the model group compared with the sham operated group,and differences were statistically significant (P＜0.01).After treatment,AT1,ERK2 expression reduced significantly in QBBA group and Guanxin-Shutong capsule group than the lisinopril group.(P＞0.05).And therapeutic effect of Guanxin-Shutong capsule group was much better than other Chinese medicine treated group (P＜0.01).Conclusion Guanxin-Shutong capsule would achieve the goal of treating chronic heart failure By inhibiting the expression of AT1 and ERK2 in organizations,and inhibiting or reversing ventricular remodeling process.
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Stilbene glycoside (TSG) has been shown to have many beneficial properties. It is therefore essential to understand the absorption and metabolism of TSG in detail. We determined the recovery of TSG and its metabolites (TSG sulfate/glucuronides) in rat gastric contents, gastric mucosa, portal vein plasma, celiac arterial plasma, bile, and urine after administration of 15mg of TSG in 0.5mL physiological saline or incubation for 20min in situ in the stomach of rats. Within 20min, (64.0±9.8)% of the administered TSG disappeared from the stomach; later, TSG was recovered in both free and conjugated forms in plasma and bile, but not in urine. On the other hand, only free TSG was detected in the gastric contents and mucosa; it was also detected in the portal vein plasma as (48.1±3.5)% of the total TSG (all forms of TSG). However, the proportion of free TSG in the celiac arterial plasma and bile decreased to 4%-10%. In addition, the proportion of free TSG to total TSG in the liver microsome incubation mixture after TSG was incubated in liver microsome at 37℃ for 30min was very low [(10.6 ± 2.6)%]. These results indicate that TSG could be quickly absorbed from the rat stomach, conjugated in liver and excreted in bile. Such novel information would be helpful for the use of TSG as a beneficial natural product which may improve its proposed efficacy in preventing chronic diseases.
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Nowadays more and more medical study fields need mathematics knowledge.The mathematics abilities of medical students include the ability of basic logic thought,changing medical problems into mathematics ones,understanding and applying mathematics knowledge as well as solving mathematics problems with computers.
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In organic chemistry teaching,we discuss with our colleagues some aspects such as how to stimulate students'interest in learning to make them have a sense of innovation,how to create the environment of question to form innovative thinking,how to establish the concept of space and develop their innovative thinking,how to conduct exploring experiment to foster their capacity of innovation.