Ethical Dilemma of "Virus Sovereignty" / 中国医学伦理学

The concept of "virus sovereignty" proposed by Indonesia in 2007 challenges the international tradition of virus sharing. In the context of the global outbreak of coronavirus disease 2019, the issue of virus sharing has become an important topic in the reform of the global health governance mechanisms. Virus sharing is an important guarantee of dealing with major global infectious diseases. However, the emergence of the concept of "virus sovereignty" shows that there are defects in the operation of virus sharing mechanism in the international community. The "virus sovereignty" problem is an ethical issue essentially, involving asymmetric interests hindering unity and cooperation, intellectual property rights expansion challenging the principle of solidarity, and excessive self-defense amplifying utility risks. "Community of common health for mankind" provides a constructive and feasible option to solve the dilemma of "virus sovereignty".

Enhancing cancer chemo-immunotherapy by biomimetic nanogel with tumor targeting capacity and rapid drug-releasing in tumor microenvironment

In the development of chemo-immunotherapy, many efforts have been focusing on designing suitable carriers to realize the co-delivery of chemotherapeutic and immunotherapeutic with different physicochemical properties and mechanisms of action. Besides, rapid drug release at the tumor site with minimal drug degradation is also essential to facilitate the antitumor effect in a short time. Here, we reported a cancer cell membrane-coated pH-responsive nanogel (NG@M) to co-deliver chemotherapeutic paclitaxel (PTX) and immunotherapeutic agent interleukin-2 (IL-2) under mild conditions for combinational treatment of triple-negative breast cancer. In the designed nanogels, the synthetic copolymer PDEA-co-HP-β-cyclodextrin-co-Pluronic F127 and charge reversible polymer dimethylmaleic anhydride-modified polyethyleneimine endowed nanogels with excellent drug-loading capacity and rapid responsive drug-releasing behavior under acidic tumor microenvironment. Benefited from tumor homologous targeting capacity, NG@M exhibited 4.59-fold higher accumulation at the homologous tumor site than heterologous cancer cell membrane-coated NG. Rapidly released PTX and IL-2 enhanced the maturation of dendritic cells and quickly activated the antitumor immune response in situ, followed by prompted infiltration of immune effector cells. By the combined chemo-immunotherapy, enhanced antitumor effect and efficient pulmonary metastasis inhibition were achieved with a prolonged median survival rate (39 days).

Effects of meditation therapy on fear of disease progress and mental health among acute myocardial infarction patients / 中国实用护理杂志

Objective:To investigate the effects of meditation therapy on fear of disease progress and mental health among acute myocardial infarction (AMI) patients.Methods:Totally, 120 cases of acute myocardial infarction patients admitted to Affiliated Hospital of Jiangnan University were divided into experimental group and control group according to the enrolled time. 60 patients with AMI treated from June to November 2018 served as the control group and 60 patients with AMI treated from January to May 2019 served as the experimental group. The patients in the control group received routine nursing, the experimental group carried out 4-week meditation therapy based on the routine nursing. Before and after intervention, the effect was assessed by Fear of Progression Questionnaire-Short Form (FoP-Q-SF) and Symptom Checklist-90 (SCL-90), respectively.Results:After intervention, the physical health and social family function dimension scores in FoP-Q-SF as well as total FoP-Q-SF scores were (12.78±3.47), (10.45±2.44), (23.24±4.25) points, significantly lower than in the control group (14.33±2.72), (11.59±2.82), (25.91±3.89) points, the difference was statistically significant ( t values were 2.623, 2.277, 3.499, P<0.05); the scores of somatization, compulsion, anxiety, depression and total SCL-90 were (1.26±0.19), (1.42±0.23), (1.19±0.28), (1.20±0.16) and (121.81±9.59) points, significantly lower than (1.83±0.25), (1.68±0.37), (1.82±0.41), (1.71±0.33) and (145.85±9.12) points in the control group, the difference was statistically significant ( t values were from 4.580 to 13.659, P<0.001). Conclusion:Meditation therapy can effectively decrease disease progress and promote mental health in patients with acute myocardial infarction.

Nanomedicine for acute respiratory distress syndrome: The latest application, targeting strategy, and rational design

Acute respiratory distress syndrome (ARDS) is characterized by the severe inflammation and destruction of the lung air-blood barrier, leading to irreversible and substantial respiratory function damage. Patients with coronavirus disease 2019 (COVID-19) have been encountered with a high risk of ARDS, underscoring the urgency for exploiting effective therapy. However, proper medications for ARDS are still lacking due to poor pharmacokinetics, non-specific side effects, inability to surmount pulmonary barrier, and inadequate management of heterogeneity. The increased lung permeability in the pathological environment of ARDS may contribute to nanoparticle-mediated passive targeting delivery. Nanomedicine has demonstrated unique advantages in solving the dilemma of ARDS drug therapy, which can address the shortcomings and limitations of traditional anti-inflammatory or antioxidant drug treatment. Through passive, active, or physicochemical targeting, nanocarriers can interact with lung epithelium/endothelium and inflammatory cells to reverse abnormal changes and restore homeostasis of the pulmonary environment, thereby showing good therapeutic activity and reduced toxicity. This article reviews the latest applications of nanomedicine in pre-clinical ARDS therapy, highlights the strategies for targeted treatment of lung inflammation, presents the innovative drug delivery systems, and provides inspiration for strengthening the therapeutic effect of nanomedicine-based treatment.

Investigations of two poisoning incidents caused by Omphalotus guepiniformis from Nanping, Fujian Province, China / 中华急诊医学杂志

Objective:To describe a systematic approach on identification of poisonous mushroom by investigating two cases of Omphalotus guepiniformis poisoning in Jianyang district, Nanping, Fujian province. Methods:Two incidents of food poisoning on 10 migrant workers were investigated. The remaining suspected mushroom samples were collected and the same fresh mushroom specimens were also collected in the following field investigations from the same dead tree and fallen trunk. These mushroom specimens were identified based on morphological and phylogenetic analyses.Results:On November 24 and 26, 2018, 8 and 2 migrant workers from Jianyang District, Nanping ate wild mushrooms and developed acute nausea, vomiting, abdominal pain and other symptoms within 10 to 90 min after consumption. They were diagnosed as mushroom poisoning, with gastroenteritis as the main manifestation. Further analysis showed that the more poisonous mushroom were consumed, the shorter latency and longer duration of nausea and vomiting were resulted. After admission, gastric lavage, catharsis, acid preparation, gastric protection, fluid replenishment and other symptomatic support treatments were given in time, all patients were discharged in 1-3 d. Based on morphological and phylogenetic analyses, the samples were identified as O. guepiniformis. Conclusions:The two incidents were caused by accidental consumption of O. guepiniformis. Awareness education about poisonous mushroom should be provided to migrant workers to prevent more such poisoning incidents in the future.

knocking out mediated by CRISPR-Cas9 genome editing for PD-L1 attenuation and enhanced antitumor immunity

Blocking the programmed death-ligand 1 (PD-L1) on tumor cells with monoclonal antibody therapy has emerged as powerful weapon in cancer immunotherapy. However, only a minority of patients presented immune responses in clinical trials. To develop an alternative treatment method based on immune checkpoint blockade, we designed a novel and efficient CRISPR-Cas9 genome editing system delivered by cationic copolymer aPBAE to downregulate PD-L1 expression on tumor cells specifically knocking out Cyclin-dependent kinase 5 () gene . The expression of PD-L1 on tumor cells was significantly attenuated by knocking out , leading to effective tumor growth inhibition in murine melanoma and lung metastasis suppression in triple-negative breast cancer. Importantly, we demonstrated that aPBAE/Cas9-Cdk5 treatment elicited strong T cell-mediated immune responses in tumor microenvironment that the population of CD8 T cells was significantly increased while regulatory T cells (Tregs) was decreased. It may be the first case to exhibit direct PD-L1 downregulation CRISPR-Cas9 genome editing technology for cancer therapy. It will provide promising strategy for preclinical antitumor treatment through the combination of nanotechnology and genome engineering.

Recent progress in drug delivery

Drug delivery systems (DDS) are defined as methods by which drugs are delivered to desired tissues, organs, cells and subcellular organs for drug release and absorption through a variety of drug carriers. Its usual purpose to improve the pharmacological activities of therapeutic drugs and to overcome problems such as limited solubility, drug aggregation, low bioavailability, poor biodistribution, lack of selectivity, or to reduce the side effects of therapeutic drugs. During 2015-2018, significant progress in the research on drug delivery systems has been achieved along with advances in related fields, such as pharmaceutical sciences, material sciences and biomedical sciences. This review provides a concise overview of current progress in this research area through its focus on the delivery strategies, construction techniques and specific examples. It is a valuable reference for pharmaceutical scientists who want to learn more about the design of drug delivery systems.

Clinical characters, treatment and prognosis in 26 children with optic pathway gliomas / 中南大学学报(医学版)

To explore the clinical characters, treatment and prognosis for pediatric optic pathway gliomas (OPGs).
 Methods: A total of 26 patients with OPGs, who were diagnosed and treated at Neurosurgery of Xiangya Hospital of Central South University between June 2010 and November 2017, were retrospectively reviewed, and their average age was 5.5 years old. The influential factors for patients' progression-free survival (PFS) and overall survival (OS) were analyzed.
 Results: All patients were classified into Type II and Type III based on Dodge classification and received surgery treatment. Vision was improved after surgery in 20 patients. Twenty-four patients (92.3%) were continually followed up, and 14 patients (58.3%) received post-radiation treatment. Twenty-one patients were still alive and 15 patients' symptoms were not progressed. The PFS and OS in patients received radiation therapy were better than those without radiation therapy (PFS: P<0.01; OS: P<0.05). The postoperative visual prognosis might be related to the choice of surgical approach.
 Conclusion: Treatment of children with OPGs should include surgery and postoperative radiotherapy. The eyesight protection in surgery is as important as tumor resection.

Serosal and muscular layers incision and use of submucosal layers exfoliation technique in laparoscopic surgery for gastric gastrointestinal stromal tumors / 中华普通外科杂志

Objective To explore the feasibility and clinical efficacy of serosal muscular layers incision and submucosal layers exfoliation technique in laparoscopic surgery for gastric gastrointestinal stromal tumors(GIST).Methods 28 patients with gastric GIST underwent serosal muscular layers incision and submucosal layers exfoliation technique under laparoscopic surgery.Patients' clinicopathologic characteristics,operative outcomes,postoperative complications,and follow up results were analyzed retrospectively.Results Surgery was successfully completed in all patients,and no one was converted to open surgery.The average operation time was (66 ± 15) min,and the intra operative blood loss was (16 ± 10) ml,the time of passage of gas by anus after operation was (20 ± 10)h,the time starting liquid diet was (2.5 ± 1.6) d,and the length of postoperative hospital stay was (7 ± 3) d.One patient had delayed gastric emptying,one had incisional infection.All the specimen had complete pseudocapsule and negative margin.pathology was all gastric GIST.After a median 22 months followed up,no recurrence or metastasis were found.Conclusion Serosal muscular layers incision and submucosal layers exfoliation under laparoscopic surgery is a safe and feasible procedure for treating gastric GIST.

Fructose metabolism and tumors / 国际肿瘤学杂志

Increasing sugar intake can be considered as a risk factor for some tumors,such as breast cancer,lung cancer,endometrial cancer,ovarian cancer,gallbladder cancer,pancreatic cancer,etc.Fructose can promote tumor formation and progression by several mechanisms,resulting in poor prognosis and increased chemotherapy resistance.Limitation of fructose consumption can reduce the risk of tumor,delay tumor progression and improve drug resistance,playing an auxiliary role in tumor treatment.

Serosal and muscular layers incision and use of submucosal layers exfoliation technique in laparoscopic surgery for gastric gastrointestinal stromal tumors / 中华普通外科杂志

Objective@#To explore the feasibility and clinical efficacy of serosal muscular layers incision and submucosal layers exfoliation technique in laparoscopic surgery for gastric gastrointestinal stromal tumors(GIST).@*Methods@#28 patients with gastric GIST underwent serosal muscular layers incision and submucosal layers exfoliation technique under laparoscopic surgery. Patients′clinicopathologic characteristics, operative outcomes, postoperative complications, and follow up results were analyzed retrospectively.@*Results@#Surgery was successfully completed in all patients, and no one was converted to open surgery.The average operation time was (66±15) min, and the intra operative blood loss was (16±10) ml, the time of passage of gas by anus after operation was (20±10)h, the time starting liquid diet was(2.5±1.6)d, and the length of postoperative hospital stay was (7±3)d. One patient had delayed gastric emptying, one had incisional infection. All the specimen had complete pseudocapsule and negative margin. pathology was all gastric GIST. After a median 22 months followed up, no recurrence or metastasis were found.@*Conclusion@#Serosal muscular layers incision and submucosal layers exfoliation under laparoscopic surgery is a safe and feasible procedure for treating gastric GIST.

Value of CT signs in predicting Fuhrman grading of clear cell renal carcinoma / 实用放射学杂志

Objective To investigate the predictive value of CT signs in the pathological Fuhrman grading of clear cell renal carcinoma (ccRCC).Methods The clinicopathological features and CT findings of 72 patients with ccRCC which confirmed by operation and pathology were analyzed retrospectively.According to the WHO Fuhrman grading,all patients were divided into low-grade(Fuhrman gradeⅠorⅡ)or high-grade (Fuhrman gradeⅢorⅣ).ChiG square test and t-test were used to compare the clinical data and CT findings between the two groups,including morphological features (site,whether the renal medulla invasion,morphology,growth pattern,border,pseudo-envelope,lobulation sign,interface,perirenal fascia and the same lateral adrenal invasion,renal sinus and perirenal fat invasion,venous invasion,lymphadenopathy, maximum diameter),density (bleeding,necrosis ratio,calcification,fat)and enhancement characteristics (the degree of enhancement, strengthening method).And the pathological Fuhrman grading was the gold standard.The ROC was used to analyze the diagnostic efficacy of CT signs on Fuhrman grading.The Delong test was used to compare the AUC of different CT signs.Results There were significant differences in tumor maximum diameter,the renal medulla invasion,and lobulation sign between the Fuhrman low-grade and high-grade group(χ2/t＝－4.31 7,9.794,7.325,P＜0.05).There were no differences in gender,age,location sign,morphology,growth pattern, border,pseudo-envelope,interface,perirenal fascia and ipsilateral adrenal invasion,renal sinus and perirenal fat invasion,necrosis ratio,degree of enhancement,strengthening method between two groups (P＞0.05). The largest diameter of the tumor,the renal medulla invasion and the lobulation sign were useful for Fuhrman diagnosis.The AUC was 0.778,0.647 and 0.644,respectively.And there were significant differences between the maximum diameter and the renal medulla invasion or lobulation sign (P＜0.05).Conclusion The maximum diameter,medulla and lobular sign can predict the Fuhrman grading of ccRCC,and the maximum diameter prediction is the most accurate.

Fructose metabolism and tumors / 国际肿瘤学杂志

Increasing sugar intake can be considered as a risk factor for some tumors, such as breast cancer, lung cancer, endometrial cancer, ovarian cancer, gallbladder cancer, pancreatic cancer, etc. Fructose can promote tumor formation and progression by several mechanisms, resulting in poor prognosis and increased chemotherapy resistance. Limitation of fructose consumption can reduce the risk of tumor, delay tumor progre-ssion and improve drug resistance, playing an auxiliary role in tumor treatment.

Application value of secondary splenic pedicle separation technology through superior posterior approach of the pancreatic tail in laparoscopic partial splenectomy / 中华消化外科杂志

Objective To investigate the application value of secondary splenic pedicle separation technology through superior posterior approach of the pancreatic tail in laparoscopic partial splenectomy.Methods The retrospective cross-sectional study was conducted.The clinicopathological data of 13 patients who underwent laparoscopic partial splenectomy in the Ningbo First Hospital from March 2016 to October 2017 were collected.After preoperative assessment using computed tomography(CT) angiography,13 patients underwent laparoscopic partial splenectomy using secondary splenic pedicle separation technology through superior posterior approach of the pancrcatic tail.Observation indicators:(1) intra-and post-operative recovery situations;(2) follow-up situations.Follow-up using outpatient examination was performed to detect postoperative changes of peripheral blood platelet (PLT),thrombosis of splenic vein,lesions residual or recurrence up to November 2017.Measurement data were represented as average (range).Results (1) Intra-and post-operative recovery situations:13 patients underwent successful laparoscopic partial splenectomy using secondary splenic pedicle separation technology through superior posterior approach of the pancreatic tail,without conversion to open surgery,including 6 with laparoscopic partial splenectomy of inferior pole of the spleen and 7 with laparoscopic partial splenectomy of upper pole of the spleen.Operation time was 42-93 minutes,with an average of 61 minutes;volume of intraoperative blood loss was 30-260 mL,with an average of 92 mL;postoperative gastrointestinal function recovery time was 22-47 hours,with an average of 34 hours;postoperative drainage tube removal time was 3.0-6.0 days,with an average of 4.2 days.The postoperative pathological examination of 13 patients:7,2,2,1 and 1 patients were respectively confirmed with splenic cysts,splenic hemangiomas,vascular hemangiomas,splenic hamartoma and splenic lymphangioma.Of 13 patients,1 was complicated with splenic recess effusion and fever,and was improved with B ultrasound-guided percutaneous catheter drainage.Duration of hospital stay of 13 patients was 7.0-16.0 days,with an average of 9.6 days.(2) Follow-up situations:13 patients were followed up for 1.0-19.5 months,with a median time of 8.5 months.During the follow-up,PLT level of 13 patients was normal.Color Doppler ultrasound examination showed no venous embolism,and CT angiography showed good vascular perfusion.There was no recurrence of splenic cysts in 7 patients and no tumor residual or recurrence in 6 patients.Conclusion Laparoscopic partial splenectomy using secondary splenic pedicle separation technology through superior posterior approach of the pancreatic tail is safe and effective,and it can precisely dissect splenic hilum,preserve blood supply and function of the remnant spleen,and reduce surgical injury.

Clinical value of circulating tumor cell detection in evaluating the prognosis of patients with gastric cancer / 中华普通外科杂志

Objective To evaluate circulating tumor cells (CTC) in prognosis prediction of gastric cancer.Method Peripheral blood samples were obtained from 65 patients with gastric cancer and 20 normal volunteers.CTC were detected by using CellSearch(R) CTC Detecting System.Postoperative progress-free survival (PFIS) and overall survival (OS) were evaluated against CTC status and clinicopathological factors.Result CTC were positive in 35 out of 65 (53％) patients compared to 1 out of 20 (5％) healthy controls,P ＜ 0.05.CTC were not statistically corelated with patients' age,sex and lymph node status or distal metastasis,vascular invasion and tumor markers (all P ＞ 0.05).CTC positive patients had poorer OS (P ＜ 0.05) and PFS (P ＜ 0.05) compared with those with negative CTC.Conclusion Positive CTC in gastric cancer patients predict poor prognosis after radical gastrectomy.

Prospective cohort study on the risks of pre-pregnancy overweight, excessive gestational weight gain on macrosomia / 中华流行病学杂志

Objective To investigate the risks of pre-pregnancy overweight,excessive gestational weight gain on macrosomia.Methods We conducted one hospital-based cohort study,focusing on pregnant women from January 2015.All pregnant women attending to this hospital for maternal check-ups,were included in our cohort and followed to the time of delivery.Data related to general demographic characteristics,pregnancy and health status of those pregnant women,was collected and maternal pre-pregnant BMI and maternal weight gain were calculated.Logistic regression was used to explore the risk difference of pre-pregnancy BMI,excessive gestational weight gain on macrosomia.Results The overall incidence of macrosomia in our cohort appeared as 6.6％ (149/2 243).After adjusting the confounding factors including age and histories on pregnancy,prepregnancy overweight/obesity was associated with higher risks of macrosomia (OR=3.12,95％ CI:1.35-7.22,P=0.008;OR=2.99,95％CI:1.17-7.63,P=0.022) when comparing to those with normal pre-pregnancy weight.Cesarean delivery and sex of the offspring were associated with higher risk of macrosomia,while excessive gestational weight gain showed no significant difference (OR=1.41,95％CI:0.96-2.09,P=0.084).Our data showed that Macrosomia was statistically associated with gestational weight gain (P=0.002).After controlling parameters as age,history of pregnancy and related complications of the pregnant women,results from the logistic regression showed that women with gestational inadequate weight gain having reduced risks to deliver macrosomia,when compared to those pregnant women with adequate weight gain (OR=0.52,95％ CI:0.30-0.90,P=0.019).Conclusion Pre-pregnancy overweight and obesity were on higher risks to macrosomia.

Prospective cohort study on the risks of pre-pregnancy overweight, excessive gestational weight gain on macrosomia / 中华流行病学杂志

Objective To investigate the risks of pre-pregnancy overweight,excessive gestational weight gain on macrosomia.Methods We conducted one hospital-based cohort study,focusing on pregnant women from January 2015.All pregnant women attending to this hospital for maternal check-ups,were included in our cohort and followed to the time of delivery.Data related to general demographic characteristics,pregnancy and health status of those pregnant women,was collected and maternal pre-pregnant BMI and maternal weight gain were calculated.Logistic regression was used to explore the risk difference of pre-pregnancy BMI,excessive gestational weight gain on macrosomia.Results The overall incidence of macrosomia in our cohort appeared as 6.6％ (149/2 243).After adjusting the confounding factors including age and histories on pregnancy,prepregnancy overweight/obesity was associated with higher risks of macrosomia (OR=3.12,95％ CI:1.35-7.22,P=0.008;OR=2.99,95％CI:1.17-7.63,P=0.022) when comparing to those with normal pre-pregnancy weight.Cesarean delivery and sex of the offspring were associated with higher risk of macrosomia,while excessive gestational weight gain showed no significant difference (OR=1.41,95％CI:0.96-2.09,P=0.084).Our data showed that Macrosomia was statistically associated with gestational weight gain (P=0.002).After controlling parameters as age,history of pregnancy and related complications of the pregnant women,results from the logistic regression showed that women with gestational inadequate weight gain having reduced risks to deliver macrosomia,when compared to those pregnant women with adequate weight gain (OR=0.52,95％ CI:0.30-0.90,P=0.019).Conclusion Pre-pregnancy overweight and obesity were on higher risks to macrosomia.

Comparison of CT manifestations of primary colorectal mucinous adenocarcinoma and signet ring cell carcinoma / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To compare the difference in CT manifestations between primary colorectal mucinous adenocarcinoma and signet ring cell carcinoma in order to improve radiologic diagnosis.</p><p><b>METHODS</b>Clinicopathological data and CT findings of 109 patients with colorectal mucinous adenocarcinoma and 46 patients with primary colorectal signet-ring cell carcinoma confirmed by surgery and pathology from March 2008 to February 2015 in the Tumor Hospital of Yunnan Province were retrospectively collected. Differences in age, gender, tumor location, length and thickness of the involved intestinal wall, thickening pattern of the intestinal wall, lesion density, calcification, contrast-enhanced form, peri-intestinal invasion, occurrence of intestinal obstruction and metastasis of other organs were compared between the two groups.</p><p><b>RESULTS</b>Among 109 patients with colorectal mucinous adenocarcinoma, 68 were men and 41 were women with a mean age of (56.8±15.4) years. Among 46 patients with primary colorectal signet-ring cell carcinoma, 26 were men and 20 were women with a mean age of (42.9±15.6) years. Compared with mucinous adenocarcinoma group, signet-ring cell carcinoma group showed more concentric bowel-wall thickening[93.5%(43/46) vs. 81.6%(89/109), χ=9.19, P=0.030], higher lesion density [(42.0±3.0) Hu vs. (28.5±1.5) Hu, t=37.30, P=0.000], more marked enhancement [54.3%(25/46) vs. 12.8%(14/109), χ=35.21, P=0.000], less vast-low-density region in enhanced CT imaging[2.2%(1/46) vs. 45.0%(49/109), χ=73.31, P=0.000] and more severe peri-intestinal invasion [41.3% (19/46) vs. 17.4%(19/109), χ=10.25, P=0.006]. Calcification was found in 18.3%(20/109) of mucinous adenocarcinoma cases, but was not found in signet-ring cell carcinoma cases (χ=9.69, P=0.002). Target ring sign in contrast-enhanced scan was observed in 15.2%(7/46) of signet-ring cell carcinoma cases, while in none of mucinous adenocarcinoma cases (χ=17.37, P=0.000). There were no statistically significant differences in lesion location, length and thickness of the involved intestinal wall, occurrence of intestinal obstruction, lymph node metastasis, liver or peritoneum metastasis between two groups(all P>0.05).</p><p><b>CONCLUSIONS</b>Signet-ring cell carcinoma is often found in younger patients, whose CT manifestation is characterized by the target ring sign in contrast-enhanced scan, while primary colorectal mucinous adenocarcinoma is often in older patients, whose CT manifestation is characterized by calcification in unenhanced scan and low density region in enhanced CT show.</p>

Effects of different clipping time of aneurysm clips on common carotid artery wall in rabbits / 中国脑血管病杂志

Objective To investigate the effects of different clipping time of first time using permanent aneurysm clips on common carotid artery wall in rabbitsMethods Sixty healthy male Japanese white rabbits were selected.The first time permanent aneurysm clips were used to clip common carotid artery for 30 min or 60 min respectively according to the random number method (n=30 in each group).Thirty segments of common carotid artery specimens clipped by aneurysm clips were collected respectively.Mean-Whitney U test was used to conduct the comparison of histopathological damage grade of vascular wall.Results The aneurysm clips were use to clip 30 min and 60 min caused vascular wall injury could observe the middle elastic plastic plate deformation and endothelial denudation.The vascular walls in the clipping 60 min group had local necrosis with inflammatory response,and even rupture of vascular wall.There were significant differences in overall damage degree of vascular wall (U=324.00,P=0.045) and severe injury rate (0%[0/30] vs.20.0%[6/30],P=0.031) between the clipping 30 min group and the clipping 60 min group (all P<0.05).Conclusion The vascular wall injury of using disposable permanent aneurysm clips for clipping 60 min was more severe than 30 min.Attention should be paid to shortening the time of carotid artery occlusion in operation.

Optimization of Methanol Extraction Technology for Tripterine in the Fruit of Celastrus monospermus by Orthogonal Design / 中国药房

OBJECTIVE:To optimize the methanol extraction technology of tripterine in the fruit of Celastrus monospermus. METHODS:HPLC was adopted to determine the content of tripterine. Using extraction time,extraction times,solid-liquid ratio as investigation factors,extraction rate of tripterine as investigation index,orthogonal test was designed,and verification test was con-ducted. RESULTS:The optimal methanol extraction technology was as follow as 45% methanol extracting 2 h each time with sol-id-liquid ratio of 1:8 for 3 times. In the verification test,the average extraction rate of tripterine was 0.917 mg/g(RSD=2.85%, n=3). CONCLUSIONS:The optimized methanol extraction technology is stable and feasible with high extraction rate,and is suit-able for the extraction of tripterine in the fruit of C. monospermus.