Aim To investigate the bio-affinities of ligustilide and butylidenephthalide to rat aortic smooth muscle cells and the inhibitory effects of them on bFGF-stimulated proliferation of rat vascular smooth muscle cell (VSMC). Methods VSMCs were cultured from rat aorta pectoralis and identified by an immunohistochemical method. The bio-affinities between solute (ligustilide or butylidenephthalide) and cell membrane were measured by rat aortic cell membrane chromatography (CMC). The inhibitory effects of ligustilide and butylidenephthalide on bFGF-stimulated VSMC proliferation were evaluated by MTT colorimetric method. Results Both ligustilide and butylidenephthalide had selective affinities to rat aortic smooth muscle cell as the same as verapamil, one of the calcium ion antagonists. They could potently separately (P ＜ 0.05 ), but had no effects on the normal VSMC growth. Conclusion Both ligustilide and butylidenephthalide can inhibit the abnormal proliferation of VSMC induced by bFGF.

Objective: To build an extraction method of coumarins from Radix Angelicae Dahuricae. Methods: The solvent varieties, polarities, and extraction methods were systematically studied by TLC with imperatorin as marker.Results: The more effective way to extract coumarins from Radix Angelicae Dahurica was refluent extraction with 4 times amount of 95% alcohol twice (one hour each time).Conclusion: The Solvent varieties and extraction method showed greater effects than others on the extraction efficiency of imperatorin.

Objective:To study the mutation frequencies of the exon 5 and the exon 8 of PTEN (phosphatase and tensin homology deleted on chromosome ten) gene in gastric carcinoma and investigate the relationship of the gene mutation and pathological differentiation and clinical stage.Methods:The mutation of exon 5 and exon 8 of PTEN gene was detected in 42 gastric carcinoma samples and the matched adjacent normal gastric mucosa with polymerase chain reaction-single strand conformation polymorphism(PCR-SSCP) method.The PCR products of mutant samples were analysed by DNA sequencing technique.Results:The mutation of PTEN was shown in 3 of the 42 gastric carcinoma tissues and in none of the adjacent normal tissues.The mutation rates of PTEN gene in poorly differentiated and well differentiated samples were 12.00% and 0,respectively (P0.05).The mutation rates of PTEN gene in clinical stage Ⅰand Ⅱ (5.88%) had no significant difference with that in clinical stage Ⅲand Ⅳ (8.00%) (P0.05).Conclusion:PTEN gene mutation occurs mainly in poorly differentiated gastric carcinoma tissues,and the mutation rate is not related to pathological differentiation and clinical stage.

Objective: To build an extraction method of ferulic acid from Ligusticum Chuanxiong Hort.Methods: The solvent varieties, polarities, and extraction methods were systematically studied by HPLC with ferulic acid as marker.Results: The more effective way to extract ferulic acid from Ligusticum Chuanxiong Hort was effluent extraction with 8 times amount of 40% alcohol under reflux for three hours.Conclusion: The solvent varieties and extraction method showed greater effects than others on the extraction efficiency of ferulic acid.

OBJECTIVE:To investigate the effects of intra-articular injection of tranexamic acid on joint swelling,pain and recovery of joint function in patients with simple meniscus injury. METHODS:A total of 62 patients with simple meniscus injury receiving arthroscopic surgery of the knee in orthopedics department of Chongqing people's hospital during Oct. 2016-Apr. 2017 were selected and divided into control group and observation group according to random table,with 31 cases in each group. Both groups received meniscus excision or trimming under knee arthroscopy. Control group was given intra-articular injection of 0.9%Sodium chloride injection 10 mL after wound suture. Observation group was given intra-articular injection of Tranexamic acid for injection 2.0 g added into 0.9% Sodium chloride injection 10 mL after wound suture. The drainage tube was not placed in all the patients,The tourniquet was loosened after the pressurized dressing of wound. Circumferential diameter of the knee and VAS scores of 2 groups were observed before surgery,1,3,5 and 7 d after surgery. Lysholm scores were observed before and one month after surgery. The occurrence of ADR was recorded. RESULTS:There was no statistical significance in circumferential diameter of the knee,VAS score or Lysholm score between 2 groups before surgery(P>0.05). 1,3,5 and 7 d after surgery,circumferential diameter of the knee in 2 groups was significantly bigger than before surgery,but the observation group was significantly smaller than the control group 1,3 d after surgery,with statistical significance(P<0.05). There was no statistical significance in circumferential diameter of the knee between 2 groups 5 and 7 d after surgery(P>0.05). VAS score of observation group 1,3 d after surgery and control group 1,3 and 5 d after surgery were significantly higher than before surgery,but the observation group was significantly lower than the control group 1,3,5 d after surgery,with statistical significance(P<0.05). There was no statistical significance in observation group 5,7 d after surgery and control group 7 d after surgery,compared to before surgery and 7 d after surgery(P>0.05).One month after surgery,Lysholm scores of 2 groups were significantly higher than before surgery,and the observation group was significantly higher than the control group,with statistical significance(P<0.05). No severe ADR was found in 2 groups during medication,and there also was not deep venous thrombosis after surgery. CONCLUSIONS:Intra-articular injection of tranexamic acid can effectively reduce the degree of early knee swelling after knee arthroplasty,relieve postoperative early pain.It promotes the recovery of knee function with good safety.

Objective To investigate the differences in expression of Mohawk (MKX) transcription factors and collagen of types Ⅰ and Ⅲ in anterior cruciate ligament (ACL) gratis between 2 remodeling outcomes under arthroscopy.Methods Enrolled for this study were 17 patients who had undergone arthroscopic single-bundle ACL reconstruction with autogenous hamstring tendons and secondary arthroscopic exploration 48 to 131 months (average,83.1 months) after removal of tibial internal fixator at Department of Sports Medicine,The First Affiliated Hospital to Shenzhen University from March 2017 to December 2017.They were divided into a good remodeling group (11 cases) and a fair remodeling group (6 cases) according to the graft quality under arthroscopy (synovial and vascular coverage,and apparent tension,thickness and retear of the grafts).During the secondary arthroscopic procedures,biopsy of the central ACL grafts was performed.Moreover,normal ACL tissues were harvested from 8 contemporary controls of ＜ 60 years old who underwent total knee replacement.Immunohistochemical assay and quantificational real-time polymerase chain reaction were conducted to detect the expression of transcription factors and collagen of types Ⅰ and Ⅲ in all the samples.Results In the samples from good remodeling and control groups,there were abundant well-arranged collagen fibers of types Ⅰ and Ⅲ and MKX-positive cells;in the fair remolding group,the collagen fibers of types Ⅰ and Ⅲ and MKX-positive cells were much decreased in number and the fibers were not well arranged.The former 2 groups scored in immunohistochemical assay significantly higher than the latter one (P ＜ 0.05).qRT-PCR showed that the expression levels of MKX gene (0.44 ± 0.30),COL1A1 gene (0.52 ± 0.27) and COL3A1 gene (0.60 ± 0.22) in the fair remolding group were significantly lower than in the control group (1.00 ± 0.00,1.00 ± 0.00 and 1.00 ± 0.00) and than in the good remolding group (0.97 ± 0.67,0.99 ±0.38 and 1.00 ± 0.35) (P ＜ 0.05).Conclusion Good remodeling ACL grafts with histological maturation under arthroscopy are more similar to normal ACL than fair remodeling ACL grafts in expression of MKX transcription factors and collagen of types Ⅰ and Ⅲ.

Objective:To develop an efficient and robust method based on three dimensional facial landmarks for evaluating chin region asymmetry at the soft tissue level and to compare it with the tradi-tional mirror-overlap analysis method in order to test its availability.Methods:Standard symmetrical face was used for mental tubercle coordinate transformation so as to filter soft tissue three dimensional spatial angle and construct corresponding three dimensional spatial angle wireframe template.Ten patients aged 12-32 years with clinical chin region asymmetry diagnosis at the Department of Orthodontics of Peking University Hospital of Stomatology from November 2020 to November 2021 were randomly selected.Three dimensional soft tissue face scan data of the patients were collected by three dimensional face scanner and the landmark points were automatically determined by the Meshmonk non-rigid registration algorithm pro-gram,and in this way,the asymmetric three dimensional spatial angle wireframe template and corre-sponding spatial angle parameters were generated.Mirror-overlap analysis of face scan data was also per-formed in Geomagic Studio 2015 software and deviation color maps were generated.This study took mirror-overlap analysis as the gold standard method,the response rate of chin region asymmetry was eva-luated by the outcomes of the mirror-overlap analysis and three dimensional spatial angle wireframe tem-plate analysis.Results:Nine three dimensional spatial angle indicators were selected through coordinate transformation,and the response rate was calculated using mirror-overlap analysis as the gold standard method.Among these ten selected patients,the response rate of the total chin region asymmetry was 90％(9/10).Using the deviation value of mirror-overlap analysis as a reference,the response rate of chin region asymmetry in the X dimension was 86％,the response rate of chin region asymmetry in the Y dimension was 89％,and the response rate of chin region asymmetry in the Z dimension was 100％.Conclusion:The three dimensional soft tissue spatial angle wireframe template proposed in this study has some feasibility in evaluating chin region asymmetry at the soft tissue level,and its ability to recognize asymmetry separately in the three dimensional direction is better than the mirror-overlap analysis method,and the indicators recognition rate still needs to be further improved.

ObjectiveTo investigate the mental health condition of college students during the Corona Virus Disease 2019 （COVID-19） ， and to provide accurate basis for their psychological intervention. MethodsThrough the way of electronic questionnaire， questionnaire star as tools， random investigation of college students in a university in Sichuan. Self-rating Anxiety Scale （SAS）， Self-rating Depression Scale （SDS） and Somatization Symptom Scale （SSS） were used to evaluate their anxiety， depression and somatization symptoms. At the same time， a self-made questionnaire was used to investigate their styles of help seeking， and the relationships between them. ResultsA total of 551 valid questionnaires were collected， including 4.90% of anxiety symptoms， 28.68% of depression and 17.97% of somatization symptoms. In terms of somatization， the detection rate was higher in urban college students than those in rural （23.35% vs. 13.27%， P<0.05）， non-medical students was higher than medical students （21.40% vs. 13.89%， P<0.05）. Women's SSS score was higher than men's ［（26.51 ± 5.44） vs. （25.27 ± 5.78）］， urban college students' SSS score were higher than rural ［（26.69 ± 5.98） vs. （25.38 ± 5.12）］， and non-medical students’ SSS score were higher than medical students ［（26.65 ± 5.59） vs. （25.21 ± 5.45）］， and the differences were statistically significant （P<0.05）. Partial correlation analysis showed that SSS score was positively correlated with SAS score （r=0.110， P=0.010） and negatively correlated with SDS score （r=-0.087， P=0.042）. The top three common ways of help-seeking pattern among college students were self-regulation （81.85%）， talking to family or friends （70.78%） and offline psychological counseling （28.31%）. ConclusionUnder the COVID-19 epidemic， the detection rate of depressive symptoms and somatization symptoms of college students is high. The detection rate of somatization symptoms of female， urban and non-medical college students is high. Self-regulation and talking to family or friends are the main psychological styles of help seeking for college students.

OBJECTIVE: To investigate the clinical efficacy of continuous irrigation combined with closed thoracic drainage for esophagojejunal anastomotic fistula (EJAF) complicated with mediastinal, thoracic and abdominal infection after total gastrectomy. METHODS: Clinical data of 22 EJAF patients complicated with mediastinal, thoracic and abdominal infection after radical gastrectomy at Department of General Surgery of the 901th Hospital of PLA from June 2012 to May 2018 were retrospectively analyzed. Case inclusion criteria:(1) gastric adenocarcinoma confirmed by preoperative endoscopic pathology undergoing radical total gastrectomy without severe organ dysfunction;(2)EJAF complicated with mediastinal, thoracic and abdominal infections diagnosed by postoperative radiography, the presence of pleural effusion confirmed by CT and ultrasound. Among them, 10 cases were treated with simple thoracic closed drainage (single drainage group); 12 cases received same closed thoracic drainage, and a rubber catheter was placed next to the closed thoracic drainage tube in the same sinus. A 0.9% sodium chloride solution was applied in continuous drip irrigation with drip velocity at 50 to 100 ml/h(continuous flushing plus drainage group). Infection indicators, anastomotic fistula healing time and related clinical indicators were compared between the two groups. RESULTS: In the simple drainage group, 5 cases were males, age was (61.9±10.7) years old, 4 cases received laparoscopic surgery, 6 cases received open surgery, 6 cases were EJAF grade III, 4 cases were EJAF IV. In continuous flushing and drainage group, 6 cases were males, age was (61.7±11.0) years old, 7 cases received laparoscopic surgery, 5 cases received open surgery, 6 cases were EJAF grade III, and 6 cases were EJAF grade IV. Baseline data including gender, age, underlying diseases, preoperative hematological examination indexes, surgical methods, tumor TNM stage and EJAF grade were not significantly different between the two groups (all P>0.05). When postoperative EJAF was complicated with mediastinal, thoracic and abdominal infection, biochemical parameters including white blood cell, procalcitonin, C-reactive protein were not significantly different between two groups (all P>0.05). All patients of both groups achieved clinical cure without death. Compared with the simple drainage group after closed thoracic drainage, the continuous irrigation plus drainage group had significantly shorter duration of infection parameters returning to normal levels [white blood cell count: (6.8 ± 2.0) days vs.(10.5±3.0) days, t=4.062, P<0.001; procalcitonin: (7.5±1.0) days vs. (9.2±1.9) days, t=3.236, P=0.040; C-reactive protein: (8.8±1.0) days vs. (11.2±1.5) days, t=5.177, P<0.001], meanwhile time in surgical ICU [(4.9±2.5) days vs. (9.9±6.7) days, t=2.935, P=0.006], healing time of fistula [(42.9±12.5) days vs. (101.8±53.2) days, t=4.187, P=0.001] and total postoperative hospital stay [(62.3±15.8) days vs. (119.7 ±59.4) days, t=3.634, P=0.002] were significantly shorter, and total hospitalization cost was significantly lower (median 86 000 yuan vs. 124 000 yuan, Z=2.063, P=0.040) in the continuous irrigation plus drainage group. CONCLUSION The continuous closed thoracic drainage with 0.9% sodium chloride solution can accelerate infection control and remission of EJAF patients complicated with mediastinal, thoracic and abdominal infections, and shorten the healing time of anastomotic fistula.
Aged ; Anastomosis, Surgical ; Bacterial Infections ; complications ; therapy ; Digestive System Fistula ; complications ; therapy ; Drainage ; Gastrectomy ; Humans ; Laparoscopy ; Male ; Middle Aged ; Postoperative Complications ; therapy ; Retrospective Studies ; Therapeutic Irrigation