Objective To determine the effectiveness and safety of antiplatelet and anticoagulant agents in the treatment of extracranial internal carotid artery dissection (eICAD). Methods Antiplatelet and anticoagulant agents were adopted to treat two cases of eICAD in our hospital. The clinical data were retrospectively analyzed and the medical literatures concerning eICAD, which were obtained from Pubmed database, were reviewed. Results Most researches advocated the empirical use of antiplatelet and anticoagulant agents in eICAD. About 30% of occluded eICAD could be reopened in 8 days and about 60% - 80% in 3 months after the onset of the disease. During the period of treatment, the rate of ischemic stroke recurrence, disability or death was 8.3%-14.3% in anticoagulant group, while it was 7% - 23.7% in antiplatelet group. Conclusion Antiplatelet agents can be used in patients with eICAD who are contraindicated to anticoagulants. Anticoagulants should be used as early as possible in patients who are not contraindicated to anticoagulants.

Objective : To learn the awareness of chronic diseases prevention and control and its influencing factors among high school students in regions inhabited by ethnic groups,so as to strengthen the prevention of chronic diseases among adolescents in these regions. Methods: Totally 1 050 high school students in Tuquan County,Hinggan League,Inner Mongolia were selected by cluster sampling method. The general information,family factors,attitude to learning,psychological factors,behavioral styles and awareness of chronic diseases prevention and control were investigated,and the influencing factors for the awareness were analyzed by multivariate logistic regression model. Results: There were 1 001 valid questionnaires recovered,with a response rate of 95.33%. There were 685 Han students,accounting for 68.43%,241 Mongol students,accounting for 24.08%,and 75 students with other ethnic minorities,accounting for 7.49%. The average awareness rate of chronic diseases prevention and control was 53.25%;the awareness rates of hypertension prevention measures,smoking and drinking hazards,food susceptible to aflatoxin pollution and high cholesterol food were high,all more than 70%;while the awareness rates of long-term high lipid hazards,high blood pressure diagnosis standard and diabetes symptoms was low,all less than 40%. There was no significant difference in the awareness rate of chronic diseases prevention and control among different nationalities（P>0.05）. The results of multivariate logistic regression analysis showed that the students who were female（OR=1.309,95%CI：1.008-1.700）,had high achievement（OR=1.509,95%CI：1.055-2.159）,and thought exams were important（OR=1.570,95%CI：1.204-2.046）were more likely to have high awareness,while the students who spent five to less than eight hours a day on screens（OR=0.514,95%CI：0.335-0.789）were less likely to have high awareness. Conclusions The awareness rate of chronic diseases prevention and control of high school students in Tuquan County is 53.25%,and there is no significant difference between Mongol and Han students. Gender,academic performance,attitude to examination and time spent on screens can affect the awareness rate.

Objective: To explore the effect of proprioception combined with core stability training on the static balance ability and dynamic balance ability of college students, and to provide an experimental basis for studying body balance ability and preventing sports injuries. Methods: In August 2019, 112 non sports students from Shandong Institute of Physical Education were recruited, and 52 subjects were selected as the intervention group and 60 as the control group by random number table method. The intervention group was given proprioceptive training combined with core stability training, while the control group was given core stability training. The static and dynamic balance abilities of the two groups of subjects before and after training were compared. Results: The static balance ability of the intervention group was higher than that before the intervention ( F =2.17， P <0.05) at the 5th and 11th weeks, which were 18.31% and 47.37% higher, respectively. The ability to stand on one foot with eyes closed at the 11th week in the intervention group was higher than that in the control group at the 11th week( t =2.25， P <0.05). After training, the equilibrioception of the intervention group was improved, increasingly improved in the 11th week. And compared with that in intervention group in the 5th and 11th week, the ability was also higher than the balance ability of the intervention group before the intervention( F =2.37， P <0.01), 12.01% and 12.99% higher, respectively. Conclusion Proprioception and core stability training can effectively improve the static and dynamic balance ability of college students, and the training effect of proprioceptive training combined with core stability training is better than that of core stability training.

Objective: To investigate the vascular anatomy of the stomach, especially the right gastroepiploic artery for the reconstruc-tion of a gastric tube during esophagectomy. Methods: The vascular anatomy of the stomach was studiing in 28 embalmed human specimens provided by the Department of Anatomy, Shanghai Medical College, Fudan University, included 10 female and 18 male spec-imens. The length and diameter of gastric vessels were measured. The ratio of the length of the right gastroepiploic artery to the length of the greater curvature was calculated. Anastomosis between the left and right gastroepiploic arteries was also assessed. Re-sults: Twenty-five left gastric arteries were observed in the autopsies, with the mean diameter of 3.40 (2.10-6.40) mm. Twenty-one right gastric arteries were measured, with the mean diameter of 1.97 (0.68-3.56) mm. Twenty-six left gastroepiploic arteries were ob-served, with the mean diameter of 1.87 (0.80-2.96) mm. Twenty-eight right gastroepiploic arteries were measured, with the mean di-ameter of 2.82 (1.58-4.80) mm. The mean lengths of the 28 right gastroepiploic arteries and their greater curvatures were 216.71 (120-318) mm and 356.39 (248-487) mm, respectively. The ratio of the length of right gastroepiploic arteries and greater curvatures was 0.61 (0.45-0.82). The anastomosis between the left and right gastroepiploic arteries was observed in 60.7% (17/28) of the specimens. Conclusions: The length and diameter of gastric vessels were calculated. It was assumed that the right gastroepiploic artery provides an average of 61% of the blood supply for the great curvature. In addition, the anastomotic branch of the right and left gastroepiploic arteries was observed in 60.7% specimens. These anatomical data allow surgeons to estimate the blood supply and to choose an opti-mal method of gastric tube reconstruction during esophagectomy.

Strain-resource engineering is often considered as an important infrastructure of microbiology related research and industry. The western developed countries took the lead in establishing the classical microbial resource utilization method, and continuously improved the preservation system, species annotation technology and global sharing mechanism, which realized the expansion and reserve of biological resources since end of the 19th century. The rich and diversified germplasm resources, standard strains and production strains not only have important economic values, but also maintain the advantages of scientific research, bioeconomy (such as antimicrobial agents, vaccines, detection reagent development and standard development, etc.) and national security. Although there has been a lot of progress in related research in recent years, compared with developed countries, there is still a big gap in related fields in China. The investment and top-level design in this area lag far behind the western developed countries, and it is not commensurate with the current level of economic and social development in my country. Drawing lessons from the practice of WFCC and WDCM (World Data Center for Microorganisms, Global microbial data Center, affiliated to WFCC), for the purpose of collecting new clinical species/strains, this paper puts forward some suggestions on the identification, preservation and upload system of isolates.

Objective:To investigate the effects of theta burst stimulation(TBS)mode repeated transcranial magnetic stimulation (r-TMS) in the left prefrontal on negative symptoms and cognitive function in the elderly chronic schizophrenic patients.Methods:Totally 48 patients with stable chronic senile schizophrenia (24 cases in r-TMS treatment group and 24 cases in r-TMS pseudo stimulation control group) were selected. The treatment group was given the TBS mode r-TMS performed in the left dorsolateral prefrontal cortex. The control group was given pseudo stimulation at the same site. Before and after treatment, the brief psychiatric rating scale(BPRS), scale for assessment of negative symptoms(SANS), and positive and negative syndrome scale(PANSS)were used to assess mental symptoms, while Mattis-dementia rating scale(MDRS-2)and social adaptation functioning evaluation(SAFE)were used to assess cognitive function and social function. SPSS 20.0 was used for statistical analysis.Comparisons of the differences between inter groups and intra groups were conducted by independent sample t test and paired t-test. Results:(1)There were significant differences in the total score of PANSS scale((60.17±3.73), (56.67±3.12)), the negative symptom subscale score of PANSS((20.88±2.94), (17.96±2.33)) and the score of SANS((30.67±1.66), (30.25±1.45)) before and after treatment in the treatment group (all P<0.05). The D-value before and after treatment in the scores of BPRS ( t=3.513, P=0.001), PANSS ( t=6.048, P<0.01), negative symptom subscale ( t=6.610, P<0.01) and SANS ( t=8.239, P<0.01) were significantly different between the two groups. (2)There were significant differences in the scores of MDRS-2 and its sub scales before and after treatment in the treatment group (all P<0.05). The D-value before and after treatment in the scores of MDRS-2 ( t=6.216, P<0.01), attention ( t=4.596, P<0.01), start/maintain ( t=6.424, P<0.01), concept formation ( t=3.974, P<0.01), construction( t=2.194, P=0.033) and memory ( t=3.162, P=0.003) were significantly different between the two groups.(3)There was no significant difference in the SAFE score between the treatment group and the control group before and after treatment ( t=0.138, 0.142, both P>0.05). Conclusion:TBS can improve the negative symptoms and cognitive function in patients with the elderly chronic schizophrenic, but the effect of social function is not clear.

OBJECTIVE To investigate the in vitro inhibitory mechanism of berberine on the proliferation of tumor stem cells and evaluate its in vivo safety. METHODS Flow cytometry was used to select tumor stem cells from mouse skin melanoma B16F10 cells； CD44， CD133， Nanog homologous box protein （NANOG） and octamer-binding transcription factor 4 （OCT4） were used as indicators to characterize tumor stem cells. Tumor stem cells were divided into control group， all-trans retinoic acid （ATRA） group， and berberine group， and the CCK-8 method was used to detect the effects of berberine on the viability of tumor stem cells； flow cytometry was adopted to detect cell apoptotic rate， the proportion of CD44+/CD133+ and the positive cell rate of sex determining region Y box protein 2 （SOX2）； the morphological changes of tumor balls were recorded after treatment with berberine； the morphology of cell pyroptosis in each group was recorded， and the release rate of lactate dehydrogenase （LDH） was detected； Western blot assay was adopted to detect the expressions of pyroptosis-related protein gasdermin E （GSDME）， GSDME- N， caspase-3 and cleaved caspase-3. Preliminary evaluation of in vivo safety of berberine was conducted by using zebrafish embryo toxicity experiments. RESULTS Compared with B16F10 cells， the proportion of CD44+/CD133+ cells in tumor stem cells and the fluorescence intensity of NANOG and OCT4 were significantly increased （P＜0.000 1）. The half-inhibitory concentration of berberine to tumor stem cells was 50.98 μmol/L. Compared with the control group， the apoptotic rate of cells in the berberine group was significantly increased， while the proportion of CD44+/CD133+ cells and the rate of SOX2 positive cells were reduced significantly （P＜0.000 1）； tumor stem cell spheroids were atrophied， with partial cell death. After treatment with berberine， tumor stem cells exhibited swelling in their outermost layer， the release rate of LDH of cells was significantly increased and the release rate of LDH increased with increasing dose； the protein expressions of GSDME-N and cleaved-caspase-3 of cells in berberine 20， 40 μmol/L groups were significantly increased， and the protein expressions of GSDME and caspase-3 were significantly reduced （except for berberine 20 μmol/L group， P＜0.05）. The embryonic development of zebrafish treated with berberine was almost unaffected， and the survival rate of embryo reached 100%， with no obvious abnormalities observed. CONCLUSIONS Berberine has good activity against the proliferation of tumor stem cells， and its mechanism of action may be related to activating GSDME and promoting cell pyroptosis； berberine has good in vivo safety.

RNAs are involved in the crucial processes of disease progression and have emerged as powerful therapeutic targets and diagnostic biomarkers. However, efficient delivery of therapeutic RNA to the targeted location and precise detection of RNA markers remains challenging. Recently, more and more attention has been paid to applying nucleic acid nanoassemblies in diagnosing and treating. Due to the flexibility and deformability of nucleic acids, the nanoassemblies could be fabricated with different shapes and structures. With hybridization, nucleic acid nanoassemblies, including DNA and RNA nanostructures, can be applied to enhance RNA therapeutics and diagnosis. This review briefly introduces the construction and properties of different nucleic acid nanoassemblies and their applications for RNA therapy and diagnosis and makes further prospects for their development.