Objective To construct models of viral transfection and hypoxia/reoxygenation induced cellular injury in adult mouse cardiomyocytes(AMCMs)isolated using a non-Langendorff method.Methods AMCMs were isolated,extracted,sedimented,and plated using a non-Langendorff method.The morphology and survival rate of the isolated cells were evaluated 2,24,48 and 72 h after plating,and their integrity was observed by immunofluorescence staining for α-actinin.The isolated AMCMs were infected with adenoviruses carrying an RFP-expressing vector and fluorescence images were obtained at 36 and 48 h post-infection and used to calculate transfection efficiency.The cells were cultured under hypoxic conditions for 45 min,reoxygenated for 24 h,and then stained with propidium iodide(PI)to verify establishment of the hypoxia/reoxygenation injury model.Results The survival rates of AMCMs at 2,24 and 48 h after plating were comparable,but survival was significantly reduced at 72 h.The integrity of the AMCMs was good and＞80%of the cells were transfected with adenovirus at 48 h.After hypoxia/reoxygenation treatment,42%of cells were stained by PI,suggesting successful establishment of the AMCM injury model.Conclusions In this study,we developed a non-Langendorff method for the fast and easy isolation of AMCMs with high cell viability.The isolated cells can be efficiently infected with adenovirus and respond to hypoxia/reoxygenation injury.These findings provide a systematic method for isolating AMCMs and for applying gene modification and hypoxia/reoxygenation injury in these cells.

This article has systematically sorted out and verified the name， origin， producing area， quality evaluation， harvesting and processing of Pruni Semen by consulting ancient materia medica， medical books， prescription books and modern literature， in order to provide a basis for the development of famous classical formulas containing Pruni Semen. The results showed that Pruni Semen， as a medicinal material， has been widely used in medical literature of past dynasties since it was collected in Shennong Bencaojing， and also included under the names such as Yuhe， Yuzi and Yuli， and aliases such as Jueli， Queli and Chexiali. The primordial plants mentioned in the past dynasties involve about 12 species of Rosaceae， but with Prunus humilis， P. japonica and P. glandulosa as mainstream varieties used in the past dynasties， while the 2020 edition of Chinese Pharmacopoeia stipulates that the basal plants are P. humilis， P. japonica and P. pedunculata. Most of the ancient records for the origin of Pruni Semen are found everywhere in high mountains， valleys and hills， modern literature records that its origin varies according to its base， for example， P. humilis and P. japonica are mainly produced in Hebei， eastern Inner Mongolia， Liaoning， Shandong and other regions of China， and P. pedunculata is mainly produced in Inner Mongolia. Modern literature summarizes its quality as faint yellow， full and fulfilling， neat and not broken， and non-oiling， and the small Pruni Semen is better than the big Pruni Semen. The ancient processing methods of Pruni Semen mainly include blanching and peeling， blanching and peeling followed by frying， and blanching and peeling followed by pounding， with the common feature of blanching and peeling. The successive editions of Chinese Pharmacopoeia stipulate that it should be pounded when used. Based on the results of the herbal textual research and the writing time of Bianzhenglu， and combined with the market survey of Pruni Semen， it is suggested that P. humilis or P. japonica should be used as the origin of Pruni Semen in Sanpiantang， and it is harvested when the fruits are ripe， the kernels are collected by removing the stones， and processed by blanching， peeling and pounding consulting the decoction method in the current edition of Chinese Pharmacopoeia.

Objective: To systematically evaluate the clinical effect of Xiaoke Decoction in the treatment of type 2 diabetes. Methods: Chinese databases such as CNKI, Wanfang, Weipu Chinese Biomedical Journal Database, and Chinese Medical Biological Literature Database, PubMed, Cochrane Library, Embase, and Web of Science were searched for English language literature from their inception until November 2019. A Meta-analysis was performed using RevMan 5.3 and Stata 12.0. Results: Thirty-eight studies were included in this study, with a total of 3757 patients. It was found that adding Xiaoke Decoction could improve total efficiency. The Xiaoke Decoction groups surpassed the western medicine groups regarding improvement in total efficiency (OR = 3.49; 95% CI: 2.78–4.39, P < 0.00001). Adding Xiaoke Decoction could lower the fasting plasma glucose (FPG) level. The Xiaoke Decoction groups surpassed the western medicine groups regarding reduction in FPG levels (MD = −1.14; 95% CI: −1.36 to 0.92, P < 0.00001). Adding Xiaoke Decoction could lower the 2 h postprandial blood glucose (2hPG) level. The Xiaoke Decoction groups surpassed the western medicine groups regarding reduction in 2hPG (MD = −1.40; 95% CI: −1.61 to 1.19, P < 0.00001). Adding Xiaoke Decoction could lower glycated hemoglobin (HbA1c). The Xiaoke Decoction groups surpassed the western medicine groups regarding reduction in HbA1c (MD = −0.77; 95% CI: −0.95 to 0.58, P < 0.00001). It was found that adding Xiaoke Decoction could lower the traditional Chinese medicine (TCM) syndrome score. The TCM syndrome scores among patients in the Xiaoke Decoction group were lower than those among patients in the control group after treatment (MD = −4.90; 95% CI: −7.22 to 2.57, P < 0.0001). At the same time, we conducted a subgroup and sensitivity analysis of age and intervention duration on the heterogeneity of total efficiency, FPG, 2hPG, HbAlc, and TCM syndrome score outcome indicators. For detecting publication bias, an egger test was conducted. Conclusion: Compared with western medicine alone, Xiaoke Decoction has more advantages for the treatment of type 2 diabetes with respect to total efficiency, FPG, 2hPG, HbAlc, and TCM syndrome score.

Background The association between serum nickel (Ni) and oral cancer incidence is unclear and most of the previous studies were observational studies that did not control for confounding factors between groups. Objective To assess the correlation of serum Ni with oral cancer incidence based on propensity score matching (PSM) and inverse probability of treatment weighting (IPTW). Methods A cohort of 456 newly diagnosed oral cancer patients was recruited from the First Hospital of Fujian Medical University during November 2011 to May 2019, and residents ordered their health check-up in hospitals or local community health centers over the same period were selected as a control group, which included a total of 1410 participants. Serum Ni was evaluated by inductively coupled plasma mass spectrometry. Case-control pairs were selected using a 1:1 PSM (caliper value of 0.02), and the study subjects in the case group and control group were weighted for subsequent analysis by IPTW. The general characteristics of the study subjects were tested for equilibrium before and after matching by chi-square test and standardized mean difference (SMD). This was followed by exploring the potential nonlinear dose-response relationship between serum Ni and oral cancer using restricted cubic splines as well as analyzing the association between serum Ni and oral cancer incidence by conditional logistic regression and weighted logistic regression. Results After controlling for between-group covariates by PSM and IPTW, the dose-response curves demonstrated that the risk of developing oral cancer tended to decline and then increase with the increasing serum Ni level. The outcome of the analysis using PSM demonstrated that as compared to the control group, the risk of developing oral cancer in the 0.09-16.80 μg·L⁻¹ serum Ni group was negatively correlated with serum Ni level (OR=0.36, 95%CI: 0.24-0.54), whereas the risk of developing oral cancer in the >16.80 μg·L⁻¹ serum Ni group was positively correlated with serum Ni level (OR=5.43, 95%CI: 2.76-10.68). After applying IPTW, a negative association was found between the risk of oral cancer and serum Ni concentration within a serum Ni window ranging from 0.09 to 20.55 μg·L⁻¹ (OR=0.39, 95%CI: 0.29-0.52), while a positive association with an OR and 95%CI of 5.54 (3.62-8.49) for the Ni concentration > 20.55 μg·L⁻¹. Conclusion In this study, a J-shaped relationship between serum Ni concentration and the risk of developing oral cancer is found, which shows that high serum Ni concentration (>20.55 μg·L⁻¹) may be a risk factor for oral cancer.

Objective: To analyze the etiology and epidemiological characteristics of influenza in Wenzhou from 2009 to 2014, so as to provide the scientific basis for control and prevention of influenza. Methods: Throat swab specimens of influenza like illness (ILI) were collected from national influenza surveillance sentinel hospitals for nucleic acid detection with real-time PCR and virus isolation, culture and sequencing, and the results were analyzed with statistical methods. Results: During the 8 years, a total of 10 577 089 cases from outpatient and emergency department were monitored in sentinel hospitals. There were 337 896 ILI cases with an average ILI treatment rate of 3.19%. A total of 4 046 ILI samples were detected in children, 511 were positive for influenza, the positive rate was 12.63%. Among the detected influenza types, type B had the highest proportion, followed by H3N2. Among the 6 age groups, the number of flu patients was the highest in 0-3 years old group, the positive rate in 10-12 years old group was the highest (35.03%). There were 28 and 45 amino acid sequence mutations of HA fragment in influenza A and B, respectively, which included multiple mutation of 391 and 145 amino acids. The phylogenetic analysis showed that the strains of type B were different in different years, and Yamagata evolved into Y1 and Y2 two branches. Conclusions The prevalence peaks of influenza in children occurred in winter and spring in Wenzhou city, accompanied by small peaks in summer. Three subtypes of serotypes B, H3N2 and A(H1N1) dominated alternatively in Wenzhou during the 8 years. We should focus on strengthening the prevention and control of influenza in preschool children and primary and secondary school students.

Objective:To develop a new cocrystal form to improve bioavailability and druggability of curcumin. Methods:Solvent crystallization was used to prepare curcumin-lysine cocrystal, and two crystal forms ( a and b) were obtained. The two cocrystal forms were characterized by elemental analysis, differential scanning calorimetry and X-ray diffraction. The dissolution profiles of the two crystal forms were detected and compared with that of curcumin. Results:Curcumin combined with lysine at a stoichiometry of 1: 1 to form the cocrystal with much better solubility than curcumin. Conclusion: Curcumin-lysine cocrystal has ideal druggability, which means the cocrystal can be a new chemical entity used for subsequent development.

Objective To compare the curative effect and biomechanical performance of cannulated compression screw (CCS) and dynamic hip screw-blade (DHS-B) in the treatment of patients with femoral neck fracture.Methods Between February 2010 and February 2014,102 patients with femoral neck fracture were treated with CCS or DHS-B at our department.They were 54 males and 48 females,aged from 15 to 86 years.There were 30 subcapital fractures,51 transcervical ones and 21 base ones.CCS was used in 60 patients and DHS-B in 42.In-hospital data were collected retrospectively to compare the curative effects in 2 groups.Furthermore,femoral neck fracture models were established using 12 adult cadaveric femoral specimens.The 12 models were randomized into 2 equal groups (n =6).Group A was subjected to fixation by 3 CCSs and group B to fixation by DHS-B.The 2 groups were compared in terms of axial loading test,rotation test and destructive axial loading test.Results The operation time (59.4 ± 20.2 min),incision size (4.1 ±0.6 cm) and intraoperative blood loss (25.9 ±9.9 mL) in the CCS group were significantly less than those in the DHS-B group (88.6±22.9 min,12.1 ±1.2cmand 156.7±107.1 mL) (P ＜0.05).The Harris hip score for the DHS-B group (91.9±9.8) was significantly higher than that for the CCS group (87.2 ± 9.2) (P ＜ 0.05).There were no significant differences between the 2 groups in hospital stay,partial weight-bearing time,or postoperative complications (P ＞ 0.05).At 500 N vertical loading,the stress values at both medial and lateral sides of the femur in group A were significantly smaller than those in group B (P ＜ 0.05).There were no significant differences between groups A and B in the average sinking displacement of femoral head or the torque at a torsion angle of 6° (P ＞ 0.05).The maximum load in group A (2,135 ±120 N) was significantly smaller than that in group B (2,986 ± 98 N) (P ＜ 0.05).Conclusion In treatment of femoral neck fracture,DHS-B fixation is obviously superior to CCS fixation,because the former is in better agreement with the femoral biomechanical property,and performs better in anti-rotation and anti-compression,leading to better functional recovery of the affected hip.

OBJECTIVE:To establish a method for the contents determination of 4 ingredients in Ligustrum lucidum decoration piece by reference extract method. METHODS:HPLC was performed on the column of XBridge C18 with mobile phase of acetoni-trile-0.1% formic acid(gradient elution) at flow rate of 1.0 ml/min,detection wavelength was 254 nm,column temperature was 30℃and volume injection was 10μl. RESULTS:The linear range was 0.037-0.598 mg for neonuezhenide,0.006-0.101 mg for ac-teoside,0.189-3.023 mg for nuezhenide and 0.314-5.027 mg for specnuezhenide(r≥0.999 0);RSDs of precision,reproducibility and stability tests were no more than 3.8%;recoveries were 98.46%-104.83%(RSD=2.43,n=6),95.55%-104.57%(RSD=3.63, n=6),100.09%-104.39%(RSD=1.45,n=6)and 98.84%-104.97%(RSD=2.02,n=6). CONCLUSIONS:The method is simple, good reproducibility,and can be used for the contents determination of 4 ingredients in L. lucidum decoration piece.

After the recent studies on virtual learning communities of medical education were described, the per-sonal service of learning resources in virtual learning communities was elaborated in aspects of personal learning re-sources and platform with medical online open learning platform, namely the basic medical teaching resource net-workas an example .

ObjectiveTo evaluate the long-term therapeutic efficacy of muscle-region alignment needling plus dermalneedle therapy in treating post-stroke upper-limb spasticity.MethodTotally 488 patients with post-stroke upper-limb spasticity were randomized into a treatment group and a control group, 244 in each group. Besides theessentialrehabilitation treatment, the treatment group was intervened by muscle-region alignment needling plus dermal needle therapy, while the control group was given regular Western medication.Thetwo groups were intervened for 3 weeks and were followed up for 6 months. The neurologic function, Functional Comprehensive Assessment (FCA), and Stroke Speciality-Quality of Life (SS-QOL) were observed for the follow-up study.ResultThe total effective rate was 93.4% in the treatment group versus 61.5% in the control group, and the difference was statistically significant (P<0.05); the neurologic function, FCA score, and SS-QOL score in the treatment group were significantly superior to that in the control group at the end of the follow-up study (P<0.05).ConclusionMuscle-region alignment needling plus dermal needle therapycan produce a content long-term therapeutic efficacy in treating post-stroke upper-limb spasticity.