Analysis on the Rationale and Path for Integrating the Great Anti-epidemic Spirit into Medical Students’ Professional Ethics Education / 中国医学伦理学

The great anti-epidemic spirit formed in the practice of fighting against the COVID-19 epidemic is a vivid embodiment of the national spirit and zeitgeist, an important part of the spiritual spectrum of the Communist Party of China, and an important content of professional ethics education for medical students in the new era. In the context of the new era, it is of great significance to integrate the great anti-epidemic spirit into the professional ethics education of medical students and explore its theoretical basis and existing problems. Based on the empirical investigation, this paper proposed the practical path of integrating the great anti-epidemic spirit into medical students’ professional ethics education from three dimensions:subject’s cognitive consciousness, school education practice, and hospital clinical training, to effectively exert the nurturing function of the great anti-epidemic spirit and improve the timeliness of professional ethics education for medical students.

Preparation, physicochemical characterization and cytocompatibility study of self-assembled silk fibroin nanoparticles / 药学学报

This study aimed to prepare silk fibroin nanoparticles (SF-NPs) and assess the physicochemical properties and biocompatibility of the formulation. An optimized and simplified solvent displacement method was employed to obtain SF-NPs. Single-factor prescription screening, such as silk fibroin (SF) solution concentration, the ratio of SF solution to organic solvent, ultrasonication power and time, and different types of organic phases, was used to optimize the formulation. The characterization of the optimal formulation included particle size, polydispersity index (PDI), zeta potential, morphology, and stability. The in vitro cell compatibility of the nanoparticles was evaluated using CCK-8 and Calcein-AM/PI cell viability staining. The results showed that when SF concentration was 20 mg·mL-1, volume ratio of aqueous phase to acetone was 1∶6, ultrasonic power was 80 W and ultrasonic time was 3 min, the best SF-NPs was obtained. The nanoparticles prepared in this study exhibit a near-spherical shape, with a uniform size distribution, having an average size of 144.8 nm, a PDI of 0.174, and a zeta potential of -27.35 mV. Results from in vitro cell experiments demonstrate excellent cell compatibility of SF-NPs, showing the ability to promote cell proliferation. The SF-NPs which were successfully prepared in this study exhibit uniform particle size and excellent biocompatibility.

Research progress on the relationship between pancreatic exocrine insufficiency and intestinal microbiota in aging individuals / 中华肝胆外科杂志

Pancreatic exocrine insufficiency (PEI) refers to insufficient or non-synchronous secretion of trypsin caused by various reasons, resulting in dyspepsia and other symptoms. Intestinal microbiota is a large number of microbiota on the surface of intestinal mucosa. Its main functions include intestinal immune function, forming intestinal biological barrier and participating in the regulation of nutrition and metabolism. Due to aging, some elderly people often have unexplained chronic pancreatic insufficiency, which is often characterized by unexplained weight loss and malnutrition. Several studies have shown that the composition of intestinal microbiota changes significantly with age. This article focuses on aging and its related PEI and then reviews its possible effects on intestinal microbiota, in order to provide a reference basis for individualized prevention and treatment strategies according to the changes of pancreatic exocrine function and microbiota in the elderly.

Laparoscopic combined with multi-video debridement in treatment of complicated infectious pancreatic necrosis / 中华肝胆外科杂志

Objective:To study the clinical application of laparoscopic combined with multi-video debridement in treatment of complicated infectious pancreatic necrosis (CIPN).Methods:The clinical data of 34 patients with CIPN who were treated at the Department of General Surgery, Xuanwu Hospital, Capital Medical University from August 2017 to December 2019 were retrospectively studied. Based on the different video methods used, these patients were divided into 3 groups: the laparoscopic combined with intraoperative ultrasound group, the laparoscopic combined with choledochoscopy group and the laparoscopic group. The number of operations, operation time, blood loss, postoperative complication rates, mortality rates and total length of hospital stay were compared.Results:There were 13 patients in the laparoscopic combined with intraoperative ultrasound group, with age of (56.4±13.4) years. There were 7 patients in the laparoscopic combined with choledochoscopy group, with age of (48.0±8.4) years. There were 14 patients in the laparoscopic group with age of (51.4±15.6) years. The number of operations of the laparoscopic combined with intraoperative ultrasound group, the laparoscopic combined with choledochoscopy group and the laparoscopic group were (2.2±1.1), (1.6±0.8), (2.9±1.4), respectively. The number of operations of the laparoscopic combined with choledochoscopy group were significantly less than that of the laparoscopic group ( P<0.05), but there were no significant differences among the other groups ( P>0.05). The operation time of the laparoscopic combined with intraoperative ultrasound group, the laparoscopic combined with choledochoscopy group and the laparoscopic group were (70.5±22.9) min, (65.7±19.9) min, (51.5±15.4) min, respectively. The operation time of the laparoscopic combined with intraoperative ultrasound group was significantly longer than that of the laparoscopic group ( P<0.05), but there were no significant differences among the other groups ( P>0.05). There were no differences in blood loss, postoperative complication rate, mortality rates and total lengths of hospital stay among the three groups ( P>0.05). Conclusion:Laparoscopic combined with multi-video debridement after making full use of the advantages of each of the video methods, can be used to improve treatment outcomes of patients with CIPN.

CT features and diagnosis and treatment of emphysema pancreatitis / 中华消化外科杂志

Objective:To investigate the computed tomography (CT) features and diagnosis and treatment of emphysema pancreatitis (EP).Methods:The retrospective and descriptive study was conducted. The clinical and imaging data of 12 patients with EP who were admitted to Xuanwu Hospital of Capital Medical University from January 2017 to June 2020 were collected. There were 10 males and 2 females, aged from 25 to 71 years, with a median age of 42 years. All patients received CT examination. Step-up treatment or one-step surgical treatment was performed on patients according to their conditions. Observation indicators: (1) CT features; (2) bacteriological characteristics; (3) treatment and follow-up. Follow-up using outpatient examination was conducted at postoperative 1, 3, 6 months to detect survival of patients up to January 2021. Measurement data with normal distribution were represented as Mean± SD, and measurement data with skewed distribution were represented as M (range). Count data were described as absolute numbers. Results:(1) CT features: 1 of the 12 patients underwent abdominal+pelvic CT plain scan, and 11 cases underwent abdominal+pelvic CT plain scan and enhanced scan of arterial and portal venous phase. CT examination of 12 patients showed diffuse enlargement of the pancreas, unclear borders and a large amount of exudation around the pancreas. Pancreatic necrotic tissues accounted for >30% of the total pancreatic volume; the Balthazar CT score was 10 (range, 8-10). Of the 12 patients, 5 cases showed that the exudation or necrosis involved bilateral prerenal fascia, 7 cases only involved the left prerenal fascia; the necrotic infection area of 11 patients formed obvious wraps. The distribution of pancreatic, peripancreatic infection and gas in 12 patients: 6 cases had pancreatic, peripancreatic infection and gas located in Ⅰ+Ⅱa area, 3 cases located in Ⅰ+Ⅱa+Ⅲ area, 2 cases located in Ⅰ+Ⅲ area, and 1 case located in Ⅰ area. There was gas in the pancreatic parenchyma in 12 patients, with fluid in the abdominal cavity and pelvic cavity. (2) Bacteriological characteristics: the culture results of peripancreatic necrotic issues in 12 patients were all positive for the pathogenic specimens, and 27 strains were cultured. Klebsiella pneumoniae was the most common in the culture of necrosis from 12 patients, followed by Escherichia coli and Enterococcus bacteria. Fungus was found in the culture of necrosis from 1 patient. Of the 12 patients, 5 had negative blood cultures and 7 had positive blood cultures. A total of 14 strains were cultured, with Klebsiella pneumoniae being the most common; fungus was found in the blood culture from 4 patients. (3) Treatment and follow-up: 1 patient underwent percutaneous catheter drainage, 7 underwent step-up surgical treatment, 4 underwent one-step surgical treatment; 11 patients undergoing surgical treatment received laparoscopic-assisted removal of pancreatic necrotic tissue, including 1 case with exploratory laparotomy due to abdominal hemorrhage. Of the 11 patients undergoing surgical treatment, 7 cases received the left retroperitoneal approach surgery (including 1 case combined with the upper abdominal median approach), 2 cases received the upper abdominal median transomental sac approach surgery, 1 case received the right retroperitoneal approach surgery, and 1 case received the left rectus abdominis approach surgery. The number of operations of all the 11 patients were (3.1±0.9)times, the number of step-up treatments was (3.6±0.8)times, and the number of one-step surgery was (2.3±0.5)times. Nine of 12 patients had organ dysfunction that lasted for more than 48 hours during the treatment, which received surgical treatment after organ support and anti-infection therapy. All the 12 patients were followed up for 6 months after operation, of which 9 cases were cured after treatment and 3 cases died including 1 case dying of bleeding and 2 cases dying of septic shock combined with multiple organ failure.Conclusions:Emphysema pancreatitis is complicated by pancreatic necrosis, which is characterized by pancreatic and peripancreatic gas accumulation on CT. Most patients with EP have organ failure. Surgery is an important treatment for EP.

Evaluation of the efficacy of balloon pulmonary angioplasty in patients with chronic thromboembolic pulmonary hypertension by echocardiography / 中华超声影像学杂志

Objective@#To evaluate the cardiac hemodynamics and function before and after balloon pulmonary angioplasty (BPA) treatment in patients with chronic thromboembolic pulmonary hypertension (CTEPH) using echocardiography, and to discuss the clinical value of the treatment.@*Methods@#A total of 36 CTEPH patients with medium-high risk stratification underwent BPA during the period of September 2016 to January 2019 in Beijing Chao-Yang Hospital, Capital Medical University were recruited. The following conventional echocardiographic parameters including right ventricular basal diameter (RVD), left ventricular basal diameter (LVD), right atrial diameter (RAD), left atrial diameter (LAD), main pulmonary artery diameter (DMPA), left ventricular eccentricity index (LVEI), left ventricular ejection fraction (LVEF) and pulmonary artery systolic pressure (PASP) were recorded.Echocardiographic parameters of right ventricular (RV) function including tricuspid annular plane systolic excursion (TAPSE), right ventricular fractional area change (RVFAC), tissue Doppler–derived tricuspid lateral annular systolic velocity (S′), RV index of myocardial performance (RIMP) and right ventricular free wall longitudinal strain (GLS) were measured. The patients were divided into 2 groups according to the threshold value of postoperative SPAP of 50 mmHg (group Ⅰ: SPAP ≤ 50 mmHg, group Ⅱ: SPAP>50 mmHg). Changes between each parameter before and after BPA were analyzed.@*Results@#①The frequency of BPA treatment for CTEPH patients ranged from 1 to 6 times. After BPA treatment, SPAP decreased significantly, and the measurements of RV function including TAPSE, RVFAC, RIMP and GLS improved significantly (all P<0.05). ②Patients in group Ⅰ showed significantly better RV function including TAPSE, RVFAC and GLS compared with group Ⅱ before BPA (P<0.05). ③Univariate logistic regression showed that parameters of preoperative RV function TAPSE, RVFAC and GLS had certain effects on the curative effect of interventional surgery.@*Conclusions@#Echocardiography can evaluate the hemodynamics and RV function in CTEPH patients with BPA.After BPA, pulmonary artery pressure decreases and RV function improves to some extent, suggesting that the treatment of BPA has certain clinical application and popularization value.

Evaluation of the efficacy of balloon pulmonary angioplasty in patients with chronic thromboembolic pulmonary hypertension by echocardiography / 中华超声影像学杂志

Objective To evaluate the cardiac hemodynamics and function before and after balloon pulmonary angioplasty ( BPA ) treatment in patients with chronic thromboembolic pulmonary hypertension ( CTEPH) using echocardiography ,and to discuss the clinical value of the treatment . Methods A total of 36 CT EPH patients with medium‐high risk stratification underwent BPA during the period of September 2016 to January 2019 in Beijing Chao‐Yang Hospital ,Capital M edical University were recruited . T he following conventional echocardiographic parameters including right ventricular basal diameter ( RVD ) ,left ventricular basal diameter ( LVD) ,right atrial diameter ( RAD) ,left atrial diameter ( LAD) ,main pulmonary artery diameter ( DM PA ) , left ventricular eccentricity index ( LVEI ) , left ventricular ejection fraction ( LVEF) and pulmonary artery systolic pressure ( PASP ) were recorded .Echocardiographic parameters of right ventricular ( RV ) function including tricuspid annular plane systolic excursion ( T APSE ) , right ventricular fractional area change ( RVFAC ) ,tissue Doppler – derived tricuspid lateral annular systolic velocity ( S′) ,RV index of myocardial performance ( RIM P ) and right ventricular free wall longitudinal strain ( GLS) were measured . T he patients were divided into 2 groups according to the threshold value of postoperative SPAP of 50 mmHg (group Ⅰ :SPAP ≤ 50 mmHg ,group Ⅱ :SPAP＞50 mmHg) . Changes between each parameter before and after BPA were analyzed . Results ① T he frequency of BPA treatment for CT EPH patients ranged from 1 to 6 times . After BPA treatment ,SPAP decreased significantly ,and the measurements of RV function including T APSE ,RVFAC ,RIM P and GLS improved significantly ( all P ＜0 .05) . ②Patients in group Ⅰ showed significantly better RV function including T APSE ,RVFAC and GLS compared with group Ⅱ before BPA ( P ＜0 .05) . ③Univariate logistic regression showed that parameters of preoperative RV function T APSE , RVFAC and GLS had certain effects on the curative effect of interventional surgery . Conclusions Echocardiography can evaluate the hemodynamics and RV function in CT EPH patients with BPA .After BPA ,pulmonary artery pressure decreases and RV function improves to some extent ,suggesting that the treatment of BPA has certain clinical application and popularization value .

Application of echocardiography in percutaneous interventional treatment of pulmonary hypertension / 中华超声影像学杂志

Objective@#To evaluate and compare cardiac structure and function pre- and post-percutaneous interventional treatment of pulmonary hypertension (PH) using echocardiography.@*Methods@#Eight female patients received percutaneous interventional treatment in our hospital were enrolled. All of them were suffered moderate to severe PH. Echocardiographic parameters included: right ventricular diameter (RVD), left ventricular diameter (LVD), right atrial diameter (RAD), left atrial diameter (LAD), main pulmonary arterial diameter (DMPA), left ventricular eccentric index (EI), left ventricular ejection fraction (LVEF), right ventricular systolic pressure (RVSP), tricuspid annular plane systolic excursion (TAPSE), right ventricular fractional area change (RVFAC), tissue Doppler-derived tricuspid lateral annular systolic velocity (s′), right ventricular index of myocardial performance (RIMP) and right ventricular free wall longitudinal strain (RVLSFW). The median time for follow-up after interventional treatment was 98 d.@*Results@#①In our study, 8 patients had no significant serious complications, and only one patient had mild intimal avulsion during stenting. ②RVSP and RVD/LVD increased significantly before intervention in patients with PH (P<0.05). After interventional treatment, RVSP (P<0.01) and RVD/LVD decreased significantly (P<0.05). ③The result of follow-up showed that RVFAC, RIMP, s′and RVLSFW improved significantly(P<0.05).@*Conclusions@#Echocardiography could evaluate the recent effect of interventional treatment and illustrates that the interventional treatment for pulmonary artery stenosis is effective and safe.

Rosmarinic acid derivative RAD-9 induces apoptosis in gastric cancer MGC-803 cells via PI3K/Akt and p38 MAPK signaling pathway / 中国药理学通报

Aim To study the apoptosis-inducing effect of rosmarinic acid derivative RAD-9 on gastric cancer MGC-803 cells and the underlying mechanisms.Methods MTT assay was taken to detect the survival of gastric cancer MGC-803 cells effected by RAD-9.Cell apoptosis was detected by flow cytometry.The apoptotic morphology of MGC-803 cells was observed by Hoechst 33258 staining.The protein expression levels of Bcl-2,Bax,caspase-3,Akt,p-Akt,p38 MAPK and p-p38 MAPK were measured by Western blot.Results The results of MTT assay showed that RAD-9 inhibited the viability of gastric cancer MGC-803 cells in a time and concentration-dependent manner.Flow cytometry showed that RAD-9 significantly promoted apoptotic cell percentage in gastric cancer MGC-803 cells (P ＜ 0.01).Hoechst 33258 staining showed that the nucleus of MGC-803 cells could be observed with typical apoptotic morphological changes after RAD-9 administration.Compared with the control group,the protein expression levels of Bcl-2,Akt,p-Akt were significantly down-regulated (P ＜ 0.01),while those of Bax,caspase-3,p38 MAPK,p-p38 MAPK were significantly up-regulated (P ＜ 0.01).Conclusion RAD-9 can inhibit the growth and further induce apoptosis in gastric cancer MGC-803 cells,which may involve inhibiting PI3K/Akt and activating p38 MAPK signaling pathway.

Family Resilience:Concept and Application in Families with a Cancer Patient (review) / 中国康复理论与实践

Family resilience explores the positive resources of a family under adversity. This paper expounded the origin, concept, relat-ed factors, framework and implications of family resilience, especially the family resilience in families with a cancer patient.

Family Resilience: Concept and Application in Families with a Cancer Patient (review) / 中国康复理论与实践

@#Family resilience explores the positive resources of a family under adversity. This paper expounded the origin, concept, related factors, framework and implications of family resilience, especially the family resilience in families with a cancer patient.

Effect of early intervention of liver-smoothing and blood-activating decoction combined with acupuncture on patients with post-stroke depression / 中国中药杂志

To study the effect of early intervention of liver-soothing and Blood-activating decoction combined with acupuncture in improving neurological functions, depressive symptom and life quality of patients with post-stroke depression, and compare with fluoxetine hydrochloride. Specifically, 63 patients with post-stroke depression were randomly divided into the traditional Chinese medicine (TCM) acupuncture group (31 cases) and the western medicine group (32 cases). On the basis of the conventional treatment of the primary disease, the TCM acupuncture group was treated with liver-soothing and blood-activating decoction and acupuncture, while the western medicine group was treated with fluoxetine hydrochloride for four weeks. In the follow-up visit six months later, scores of HAMD, NIHSS and SS-QOL were observed. The scores of HAMD and NIHSS of both groups were significantly decreased (P < 0.01), while the scores of SS-QOL increased significantly, with a notable difference compared with that before the treatment (P < 0.01). Specifically, the TCM acupuncture group's was superior to the western medicine group (P < 0.05). The study suggests that the early intervention of liver-soothing and blood-activating decoction combined with acupuncture on patients with post-stroke depression has the effect in relieving depression symptom and improving neurological functions, thereby improving their quality of life and prognosis.

Antitumor effect of capsaicin on colorectal carcinoma xenograft in nude mice / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To evaluate the effect of capsaicin on nude mice xenografted with colorectal carcinoma cells, and to explore its mechanism of action.</p><p><b>METHODS</b>A nude mouse model of colorectal cancer was established by subcutaneous inoculation of human colorectal carcinoma HT-29 cells. Terminal deoxynucleotidyl transferase-mediated nicked labeling assay (TUNEL) was undertaken to detect the cell proliferation and apoptosis in the xenograft tissue in nude mice. Immunohistochemical (IHC) staining and Western blot were used to detect the expression of HSP27, Cyt-C and active caspase-3.</p><p><b>RESULTS</b>The tumor growth of the groups C10 and C20 was significantly slower than that of the group NS. The integrated optical density (IOD) of both the group C5 (2532.14 ± 578.11) and group C10 (6364.03 ± 1137.98) was significantly higher than that of the group NS (760.12 ± 238.05), (P < 0.05). The integrated optical density (IOD) of the group C20 was (15743.96 ± 1855.95), significantly higher than that of the groups C10, C5 and NS (all were P < 0.01). Immunohistochemistry showed that the cytoplasmic expression of HSP27 was strongly positive in the group NS, and significantly reduced with the increasing dose of capsaicin in the treated groups. The expression of active caspase-3 and Cyt-C in the group NS was weakly positive, and was significantly increased with the increasing dose of capsaicin in the groups C5 and C10 (P < 0.05), and the expression of active caspase-3 and Cyt-C of the group C20 was significantly higher than that of the groups C5, C10 and NS (P < 0.01). Western blot analysis showed that both the expressions of HSP27 of the group C5 (0.73 ± 0.05) and the group C10 (0.41 ± 0.03) were significantly lower than that of the group NS (P < 0.05). The expression of HSP27 of the group C20 (0.22 ± 0.06) was significantly lower than that of the groups C5, C10 and NS (P < 0.01). The expressions of active-caspase-3 and Cyt-C in the group C5 were (2.57 ± 0.34) and (2.03 ± 0.38), significantly higher than those of the group NS (P < 0.05). The expressions of active-caspase-3 and Cyt-C in the group C10 were (4.23 ± 0.45) and (3.13 ± 0.44), also significantly higher than those of the group NS (P < 0.05). The expressions of active-caspase-3 and Cyt-C in the group C20 were (5.78 ± 0.48) and (4.92 ± 0.52), significantly higher than those of the group C5, C10 and NS (P < 0.01). TUNEL analysis showed that there was a significant difference of cell apoptosis in comparison of each two groups. The higher dose of capsaicin was used, the more apoptosis was observed.</p><p><b>CONCLUSIONS</b>Capsaicin can significantly inhibit the tumor growth and induce cell apoptosis in the colorectal carcinoma xenograft in nude mice. Its mechanism of action is possibly related with the down-regulation of HSP27 expression and up-regulation of expression of active caspase-3 and Cyt-C in the colorectal carcinoma xenograft in nude mice.</p>

Progress on suxamethonium chloride analysis / 法医学杂志

Abstract: Suxamethonium chloride is a depolarizing muscle relaxant used in general anesthesia. In overdose, it causes adverse reactions such as bradycardia, arrhythmia, cardiac arrest, and death. The article reviews the progress on testing methods of suxamethonium chloride such as infrared spectroscopy, chemical color reaction, chemical titration, enzyme electrode, chromatography and mass spectrometry.

Effect of gastric bypass surgery on mRNA expression level of hepatic phosphoenolpyruvate carboxykinase in type 2 diabetic Goto-Kakizaki rats / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To investigate the effects of gastric bypass surgery(GBP) on hepatic phosphoenolpyruvate carboxykinase(PEPCK) mRNA expression in type 2 diabetic Goto-Kakizaki rats.</p><p><b>METHODS</b>Male GK rats were randomized into three groups: gastric bypass surgery(n=10), sham operation with diet restriction(n=10), and sham operation alone(n=10). Liver specimens of GK rats were collected during the intraoperative period for self-control study and 8 weeks after surgery. Fasting blood glucose, food intake, and body weight were recorded before surgery and 1, 2, 4, 8 weeks after surgery. The expression of PEPCK mRNA was measured by real-time PCR.</p><p><b>RESULTS</b>The fasting plasma glucose level decreased from(17.6±2.1) mmol/L before surgery to(7.5±0.9) mmol/L 8 weeks after surgery in GBP group. The level of PEPCK mRNA decreased from 1.08±0.38 before surgery to 0.41±0.10 8 weeks after surgery, significantly lower than that in sham operation alone group(1.04±0.12)(P<0.01). The level of PEPCK mRNA in diet restriction group increased from 1.15±0.16 before surgery to 2.54±0.82 8 weeks after surgery(P<0.01). The expression of PEPCK mRNA in diet restriction was significantly higher than that in CBP group(P<0.01).</p><p><b>CONCLUSIONS</b>GBP can significantly improve hyperglycemia in type 2 diabetic GK rat models, which may be associated with the decrease of hepatic PEPCK mRNA level.</p>

Bond strength evaluation of four adhesive systems to dentin in vitro / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To compare the adhesive strength and observe the bonding interface. According to statistic analysis and scanning electron microscope (SEM) observation, the resistance capacity of four adhesive systems is evaluated.</p><p><b>METHODS</b>Prime & Bond NT (PBNT), Tetric N-Bond (TNB), Clearfil SE Bond (CSEB), G Bond (GB) were bonded to the occlusal surfaces and mesial surfaces of third molars respectively. The mesial resins received shear force experiment and the fracture load were recorded. The tensile bond strength (TBS) of the remaining parts were tested. The interfacial configuration were observed under SEM.</p><p><b>RESULTS</b>In the shear bond strength (SBS) experiment, PBNT and TNB showed the best result, but there was no significant difference between them (P>0.05). The SBS of PBNT was stronger than that of CSEB and GB (P<0.05). The SBS of TNB was stronger than that of GB (P<0.05). There was no significant difference between TNB and CSEB (P>0.05). In accordance with the shear force result, the TBS of PBNT and TNB was larger than CSEB and GB (P<0.05). Under SEM, resin tags of PBNT and TNB were longer and slender, the bonding layer was thick. Resin tags of CSEB were shorter, the ones of GB were the fewest and shortest.</p><p><b>CONCLUSION</b>Compared to self-etching system, total-etching system could reach better bonding strength. There is some connection between the interfacial configuration of adhesives and bond strength of them.</p>

The significance of intraoperative computed tomograph scan for complex acetabular fractures / 中华骨科杂志

ObjectiveTo investigate the application of intraoperative Computed Tomograph (CT) using in surgery for complex acetabular fractures.MethodsFrom June 2008 to December 2010,14 patients (9 males,5 females; with the mean age of 45.1 years; range,28-62 years) with complex acetabular fractures were operated using intraoperative CT.Preoperative radiotherapy and CT scan were adopted to evaluate the fractures.Three dimensional reconstruction based on CT scan was used to mimic surgery.The surgery approach and the type of internal fixators were noted.Intraoperative C-arm and CT scan were used to evaluate the fractures reduction respectively.Decision of additional reduction was made by surgeons according to above mentioned methods respectively and the results were noted.Comparing to preoperative design,the change of surgery plan were noted.Overall time,frequency and radiation dose of intraoperative CT scan were also noted.ResultsAll patients in this study received average 2.7 times of intraoperative CT scan.Mean time of CT scan was 40.4 min and the overall dose of radiation was 47.2 mGy.Decision of additional reduction was made in 3 cases according to C-arm radiography and 4 cases according to CT scan (above mentioned 3 cases were included).The change of surgery plan was made in one case.In postoperative radiography evaluation according to Matta's score system,anatomical reduction were achieved in 8 cases,imperfect reduction in 3 cases and poor reduction in 3 cases.ConclusionIntraoperative CT scan increases the radiation time and dose of patients dramatically.When used to evaluate fracture reduction intraoperatively,it can't take the advantage of traditional C-arm radiography.When delicate preoperative plan is made with radiography and three dimensional reconstruction based on CT data,the efficiency of intraoperative CT scan for complex acetabular fractures are to be discussed.

Effect of Qingxin Kaiqiao fang on learning and memory ability and morphology of hippocampal nerve cells in AD mice / 中国中药杂志

<p><b>OBJECTIVE</b>To study the effect of the Qingxin Kaiqiao fang on learning and memory ability and shape hippocampal nerve cells in Alzheimer disease (AD).</p><p><b>METHOD</b>One handred and fifty mice were divid into five groups: blank group, model group, two groups of treatment by Qingxin Kaiqiao fang (14.82, 7.41 g x kg(-1)), piracetan comparison group (0.42 g x kg(-1)). The model group was orally given AlCl3 (200 mg x kg(-1)) every day. For Qingxin Kaiqiaofang and piracetan groups, AlCl3 treatment was given for 6 days at the beginning, followed by giving orally AlCl3 in the morning and drug in the afternoon for 8 weeks. Then, learning and memory aility, the contents of nitric oxide (NO), NO synthase (NOS) and acetylcholinesterase (AchE) in brain, and morphology of hippocampal nerve cells were investigated.</p><p><b>RESULT</b>Learning and memory ability of Qingxin Kaiqiaofang groups was improved, compared with comparison group; the difference was significant (P < 0.05, P < 0.01). The drug could prevent hippocampal nerve cells from damaged obviously. The contents of NO, NOS and AchE in mice of treatment groups were lower than those of comparison group; the difference was significant (P < 0.05, P < 0.01).</p><p><b>CONCLUSION</b>Qingxin Kaiqiaofang can improve learning and memory ability of AD mice, prote chippocampal nerve cells, and treat Alzheimer disease.</p>

Effect of cedemex on cAMP and cGMP levels of different brain areas in morphine withdrawal rats / 中国中药杂志

<p><b>OBJECTIVE</b>To investigate the effect of Cedemex on cAMP and cGMP contents in different brain regions in morphine withdrawal rats precipitated by naloxone.</p><p><b>METHOD</b>A physical morphine dependent model of rats was established by subcutaneous injection of morphine in gradually increasing dosage within 7 days. cAMP and cGMP contents of VTA, cortex and hippocampus of the rat brains were determined by radioimmunoassay.</p><p><b>RESULT</b>The morphine withdrawal symptoms of rats were relieved significantly by ig Cedemex. Compared with the controls, cAMP content in the region of VTA, cortex and hippocampus of the morphine dependent rats were significantly higher (P < 0.05), while cGMP contents in those regions were significantly lower (P < 0.05). cAMP contents in the area of VTA, cortex and hippocampus of the morphine dependent rats were significantly reduced, while cGMP contents were significantly increased by ig Cedemex.</p><p><b>CONCLUSION</b>Cedemex may significantly attenuate the morphine withdrawal symptoms in rats. The mechanism of this effect may be related to adjusting the contents of cAMP and cGMP in some brain regions.</p>

Morphological changes of autologous red bone marrow and periosteum graft in articular cartilage defect repair / 中国组织工程研究

BACKGROUND: Evidence from in vitro study indicates that bone marrow stromal cells and undifferentiated mesenchymal cells can different into chondrocytes.OBJECTIVE: To observe the morphological changes of red bone marrow and periosteum allograft and its capability of chondrogenesis after transplantation in rabbits for repair of articular cartilage defects.DESIGN: Randomized controlled experiment with rabbits.SETTING: Department of Human AnatomY, Medical College of Yanbian University.MATERIALS: Fourteen Chinese rabbits of either sex with body mass of (2.15±0.30) kg.METHODS: This experiment was carried out in the Department of Human Anatomy, Medical College of Yanbian University between April 2001 and February 2002. Full thickness articular cartilage defect of 3.0 mm×6.0 mm was produced in the rabbits on the patellar surface of the femur in the 28knee joints, which were then randomized to receive either transplantation with autologous red bone marrow and periosteum graft into the bone defect (20 knees) or no grafts (8 knees). The morphological changes of graft were evaluated 7 days and 2, 4, 8, and 12 weeks after the operation by gross,optical microscopic, and electron microscopic observations with also assistance of image analysis.drocyte area of two groups.RESULTS: In the 12th week after the operation, the morphology, distribution and arrangement of the regenerated tissues were similar to normal cartilage in the knees with graft transplantation, and the regenerated tissues grew to be integrated with the surrounding normal cartilage with obscure boundary between them. But the boundary between the bone defect and surrounding normal cartilage was clearly observed in the ungrafted knees,and most of the defect was replaced by fibroblasts and collagen fibers with only some small chondrocytes seen in the superficial layer. Microscopic observation in the 4th week revealed the presence of chondrocytes in the superficial layer of the graft, and imaging analysis displayed greater single cell surface in the grafted than in the ungrafted knees in the 4th, 8th and 12th weeks [(248.70±16.62) vs (168.23 ±6.14) μm2, (267.79±28.88) vs (172.93±17.18) μm2, (175.75±13.24) vs (145.35±13.54) μm2, P ＜ 0.05].CONCLUSION: The chondrogenesis in autologous complex tissue graft of red bone marrow and periosteum occurs 8 weeks after the operation, and the morphology, distribution and arrangement of the newly generated cells are similar to that of the normal cartilage, with good mutual compatibility and complementarity in the regeneration activity between the two graft tissues.