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Objective:To investigate the application value of esophagogastric anastomosis with double muscle flap plasty in total laparoscopic radical resection of proximal gastric cancer.Methods:The retrospective and descriptive study was conducted. The clinicopathological data of 5 patients undergoing radical resection of proximal gastric cancer in Cancer Hospital of China Medical University from January to December 2020 were collected. All 5 cases were male, aged from 57 to 72 years, with a median age of 65 years. All 5 patients underwent total laparoscopic radical resection of proximal gastric cancer combined with esophagogastric anastomosis with double muscle flap plasty. Observation indicators: (1) operative situations; (2) postoperative situations; (3) follow-up. Follow-up was conducted using outpatient examination and telephone interview to detect postoperative anastomosis, esophageal reflux, nutritional status, quality of life, tumor recurrence and metastasis of patients up to February 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) Operative situations: all 5 patients underwent surgery successfully. The operation time, time of esophagogastric anastomosis with double muscle flap plasty, number of lymph node dissected, volume of intraoperative blood loss, length of surgical incision of 5 patients were (316±41)minutes,(109±11)minutes, 26±4, (48±12)mL, (3.4±0.4)cm, respectively. Results of intraoperative rapid frozen section pathological examination showed negative of esophageal margin. (2) Postoperative situations: the time to postoperative initial flatus, time to postoperative initial food intake, during of postoperative hospital stay, cost of treat-ment of 5 patients were (4.8±1.5)days, (5.8±1.5)days, (11.6±2.1)days and (5.5±0.4)×10 4 yuan, respectively. Results of postoperative pathological examination of 5 patients showed gastric adeno-carcinoma in all 5 patients including 4 cases with moderately and poorly differentiated adeno-carcinoma and 1 case with highly differentiated adenocarcinoma, with the TNM staging of pT1a-3N0-1 M0 stage. Of the 5 patients, 1 case underwent postoperative mild pneumonia and was cured by conservative treatment such as anti-infection and promotion of sputum evacuation. (3) Follow-up: all 5 patients were followed up for 2 to 12 months, with a median follow-up time of 6 months. Of the 5 patients, 4 cases underwent anastomotic patency and 1 case underwent mild anastomotic stenosis who was improved after endoscopic treatment. None of the 5 patients underwent reflux esophagitis. The body mass index, the score of nutritional risk screening 2002, the score of patient-generated subjective global assessment and the score of tumor patient quality of life of 5 patients were 21 kg/m 2(range, 19-27 kg/m 2), 2(range, 1-2), 2(range, 1-3) and 47(range, 42-52), respectively. None of the 5 patients underwent tumor recurrence or metastasis. Conclusion:Esophagogastric anas-tomosis with double muscle flap plasty can be used in total laparoscopic radical resection of proximal gastric cancer which will lead to satisfactory short-term efficacy.
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Objective:To explore and optimize the teaching content of clinical case discussion course based on clinical pathophysiology and therapy (CPPT), and to improve the teaching quality of this course.Methods:Self-compiled evaluation form was sent to all the students who participated in this course in 2016-2017 school year, and the teaching satisfaction and teaching characteristics were evaluated. The differences of evaluation results from students with different educational programs or teachers with different seniority were compared, and the correlation between evaluation results and teachers' seniority was analyzed.Results:The students had a high evaluation on the course, but students from different programs had significant different comments on thinking inspiring, speech encouraging, questions guiding, process holding and effective feedback, as well as the self-evaluation of mastery degree. For teachers with different seniority, there were significant differences in scores in all aspects except speech encouraging, but no differences in mastery degree. Spearman analysis showed that there was a certain correlation between scores and teachers' seniority.Conclusion:The overall situation of the CPPT case discussion course in our school is worthy of recognition, but it needs to be improved in many aspects.
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Objective To screen and prepare a broad-spectrum monoclonal antibody against Strep-tococcus pneumoniae ( S. pneumoniae) surface protein A ( PspA) and to evaluate its potential in clinical prac-tice. Methods Hybridoma cells were screened and inoculated into the abdominal cavities of BALB/c mice to prepare antibodies in ascites. Monoclonal antibodies were obtained by ammonium sulfate precipitation and protein A affinity chromatography and then identified by SDS-PAGE and Western blot. Their specificity, iso-forms and killing activities in vitro were analyzed. Results A broad-spectrum monoclonal antibody that rec-ognized PspA subclasses 2, 3 and 4 was obtained. Its in vitro killing rate against S. pneumoniae reached 40. 3％. Conclusions A broad-spectrum monoclonal antibody that could specifically bind to PspA was suc-cessfully prepared with a strong in vitro killing activity. This study provided reference for clinical diagnosis of S. pneumoniae-related diseases, quality assessment of S. pneumoniae vaccines and further research on mono-clonal antibody therapeutics.
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Objective@#To investigate the clinical value of endoscopic ultrasonography (EUS) and Multi-slice Spiral CT (MSCT) in the preoperativestaging of tumor(T) and lymph node (N) metastasis in patients with SiewertⅡand Ⅲ typeadenocarcinoma of esophagogastric junction(AEG).@*Methods@#Clinical data of 145 Siewert Ⅱ and Ⅲ type AEG patientswithout preoperative chemoradiotherapy were retrospectively reviewed. Theyall received preoperative EUS and MSCT examination and underwent surgical resection, and the results of EUS and MSCT were compared with their postoperative pathologic staging.@*Results@#The sensitivity, specificity, and accuracy of EUS for T stage in Siewert Ⅱ and Ⅲ type AEG were higher than those of MSCT. The total accuracy of EUS and MSCT were 90.3% and 63.5%, respectively, and the difference was statistically significant (χ2=29.52, P<0.01). The sensitivity of EUS for T1, T2 and T3 were 89.5%, 91.1% and 85.2%, respectively, which were significantly higher than 42.1%, 66.7% and 29.6% of MSCT (χ2=9.47, P<0.01 for T1; χ2=8.07, P<0.01 for T2; χ2=17.40, P<0.01 for T3). In addition, the total accuracy of EUS and MSCT for lymph node metastasis status of Siewert Ⅱ and Ⅲ type AEG were 75.9% and 64.8%, respectively, showing a statistically significant difference(χ2=4.23, P=0.04). The sensitivity of EUS for N1 and N2 were 82.1% and 79.2%, respectively, which were significantly higher than 53.6% and 60.4% of MSCT (χ2=5.24, P=0.02; χ2=4.48, P=0.03). There was no statistical significance for sensitivity of EUS and MSCT in N0 and N3 (P>0.05).@*Conclusion@#EUS diagnosis of T and N staging in Siewert Ⅱ/Ⅲ type AEG showed significantly greater performance than MSCT.
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Objective To investigate the expressions of ATPase family AAA domain-containing protein 2 (ATAD2) and β-catenin,and to analyze their correlations with clinicopathological features and prognostic significance in patients with hepatocellular carcinoma (HCC).Methods The HCC tissues of 40 patients were tested by real-time PCR to study the expressions of ATAD2 and β-catenin.Real-time PCR and Western blot were performed to detect the proteins and mRNA levels of ATAD2,APC,β-catenin and wnt signaling pathway downstream.The HCC tissues of 80 patients and 20 peritumoral tissues were tested by immunohistochemistry (IHC).The cumulative survival-rate was analyzed by the Kaplan-Meier method,and univariate and multivariate were analyzed by the Cox proportional hazards model.Results ISH:The positive rates of ATAD2 and β-catenin were 65.0％ and 55.0％,respectively.These rates were significantly higher than those in the peritumoral tissues (30.0％ and 25.0％,respectively).The ATAD2 expression was related to tumor size (P ＜ 0.05),metastasis (P ＜ 0.05),serum AFP level (P ＜ 0.05) and TNM stag ing (P ＜ 0.05).The β-catenin expression was only significantly related to metastasis (P ＜ 0.05).Correlation analysis showed that the ATAD2 expression was positively related to the β-catenin expression (Pearson =0.578,P ＜ 0.01,R2 =0.3607,Spearman =0.495).This positive relationship was also found in the remaining 4 cell lines except the SK-hep1.Depleting ATAD2 up-regulated APC and down-regulated β-catenin protein and mRNA expression.Univariate and multivariate analyses showed that ATAD2 and β-catenin expressions,tumor size,metastasis,serum AFP,and TNM staging were poor prognostic factors for HCC,and ATAD2 and β-catenin expressions,metastasis,serum.AFP were independent prognostic factors.Patients whose ATAD2 and β-catenin were both positive had worse survival than those with only one positive expression or both negative expressions (P ＜ 0.05).Depleting ATAD2 down-regulated survivin,cyclinD1,c-myc,MMP7,Vimentin in wnt signaling pathway and EMT related proteins.Conclusions ATAD2 and β-catenin expressions were positively related in patients with HCC.Abnormal expressions between ATAD2 and β-catenin might participate in the wnt signaling pathway.
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Objective To investigate the clinical efficacy of the procedure for prolapse and hemorrhoids (PPH) plus external dissection and internal ligation in small incisions in the treatment of circumferential mixed hemorrhoids.Methods From January 2015 to January 2017,168 patients with annular mixed hemorrhoids in the People's Hospital of Qingzhou were selected.All cases were treated with PPH combined with small incision exfoliation and internal ligation.The clinical data of 168 patients were analyzed.Results Average operation time was 25 minutes;average hospital stay time was 6 days;168 cases were all cured,2 cases suffered from anal margin edema,7 cases urinary retention.There was no complications such as anal stricture,fecal incontinence etc.Conclusion PPH plus external dissection and internal ligation in small incisions in the treatment of circumferential mixed hemorrhoids has such multiple advantages as small incision,minor trauma,exact efficacy,less complications after operation and shorter hospital stay.
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Objective To systematically analyze the relevant literatures of problem-based learning (PBL) and to provide reference for further improvement and innovation. Methods Using bibliometric method and the package "tm" in R, we searched web of science database for PBL relevant literatures from inception to March 19 of 2018. Results A total of 5710 articles published in 77 journals had been collected. The results showed that PBL relevant literatures were increasing from 1976 to 2018. Most papers were published as article, with first authors from 84 countries of the world. The total citation of 5710 articles is 54768 and the average referenced times is 9.59. The research in those articles focused on medical education, health care sciences and engineering. Conclusions PBL has been widely used in various disciplines, especially in medical education. The research involves a wide range but the quality and depth of the study is still need to be improved.
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Objective To investigate the changes of visual acuity,fundus changes,and serum vitamin D concentration in diabetic retinopathy patients treated with metformin,and to evaluate its clinical efficacy.Methods Totally 80 cases (160 eyes) patients with background diabetic retinopathy were included in the study,and were divided into observation group (metformin + Pancreatic Kininogenase Enteric-coated Tablets) and control group (Pancreatic Kininogenase Enteric-coated Tablets) according to the different treatment methods used for 3 months.Fundus fluorescein angiography was used to evaluate the improvement of the fundus lesions.The serum levels of vitamin D were measured with electrochemiluminescence immunoassay (ECLIA).Results After 3 months of treatment,serum vitamin D concentration of the observation group increased,and the differences were statistically significant (P ＜ 0.05) when compared to before treatment.However,3 months after treatment,serum vitamin D levels of the control group increased slightly,but the difference was not statistically significant (P ＞ 0.05).The total effective rate of fundus improvement in the observation group and the control group was 70％ and 55％,respectively.There was significant difference between the two groups in the improvement of fundus (P ＜ O.05).Conclusions Metformin has an adjunctive effect on background diabetic retinopathy,and the increase of serum vitamin D may be one of the mechanisms of metformin in improving diabetic retinopathy.
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OBJECTIVE:To observe the effects of insulin glargine in type 2 diabetes mellitus patients with poor glucose con-trol by rosiglitazone and metformin. METHODS:A total of 90 patients with type 2 diabetes mellitus with poor glucose control by rosiglitazone and metformin admitted to our hospital from Aug. 2013 to Dec. 2015 were divided into control group and observation group according to random number table,with 45 cases in each group. Control group was given Acarbose tablets 50 mg orally be-fore meal,tid,with maximal dose of 300 mg/d. Observation group was given Insulin glargine injection subcutaneously,qd,with initial dose of 0.15 u/kg,adjusted according to blood glucose monitoring,with maximal dose of 40 u/d. Both group were treated for 24 weeks. The levels of fasting blood glucose,2 h postprandial blood glucose,HbA1c,fasting C peptide and 2 h postprandial C peptide were compared between 2 groups before and after treatment. The time of blood glucose reaching target and the occur-rence of adverse events were recorded,and the incidence of adverse events was calculated. RESULTS:Before treatment,there was no statistical significance in above indexes between 2 groups(P>0.05). After treatment,The levels of fasting blood glucose and 2 h postprandial blood glucose in 2 groups were significantly lower than before treatment,and the levels of fasting C peptide,2 h postprandial C peptide and HbA1c were significantly higher than before treatment;except for fasting blood glucose,above indexes of observation group were significantly better than those of control group,with statistical significance (P<0.05). The time of blood glucose reaching target in observation group was significantly shorter than control group,the incidence of nocturnal hypogly-cemia,severe hypoglycemia,edema and gastrointestinal reactions and total adverse events in observation group were significantly lower than control group,with statistical significance(P<0.05). CONCLUSIONS:The application of insulin glargine in type 2 di-abetes mellitus patients with poor glucose control by rosiglitazone and metformin can effectively reduce the levels of blood glucose and HbA1c,and improve islet function with good safety.
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Objective To evaluate the efficacy and safety of surgery combined with intraperitoneal chemotherapy for advanced gastric cancer (AGC). Methods The related randomized controlled trials were searched in the following databases such as Cochrane Library, PubMed, Web of Science from database establishment to April 2017. Data extraction and quality assessment by means of NOS were completed by two researchers.The survival rate,recurrence rate,mortality and morbidity were analyzed by RevMan 5.3 software. Results Seventeen literatures which were strictly filtrated from the original 2 383 literatures were included for Meta-analysis and the NOS score was 6-8. A total of 2 302 AGC cases were included to divide for 1 175 undergoing surgery with intraperitoneal chemotherapy and 1 127 undergoing surgery alone. Meta-analysis results showed that compared with surgery alone, surgery with intraperitoneal chemotherapy could improve the 1-year(OR=1.93,95 % CI 1.41-2.66,P<0.000 1),2-year(OR=1.82,95 % CI 1.41-2.35,P<0.000 01) and 3-year (OR= 1.93, 95 % CI 1.54 - 2.42, P< 0.000 01) survival rate of ACG cases, while the overall mortality was reduced (OR=0.47, 95 % CI 0.34-0.64, P<0.000 01). In terms of recurrence rate, the overall(OR=0.46,95 % CI 0.32-0.68,P<0.000 1)and peritoneal(OR=0.47,95 % CI 0.29-0.76,P=0.002) recurrence rates of surgery with intraperitoneal chemotherapy were both lower than those of surgery alone. There were not significantly differences between surgery with intraperitoneal chemotherapy and surgery alone in lymph nodes and liver metastasis rate. However, surgery with intraperitoneal chemotherapy had more high occurrence rates than surgery alone (OR= 1.47, 95 % CI 1.16 - 1.85, P= 0.001), especially the bone suppression (OR= 3.07, 95 % CI 1.70 - 5.54, P= 0.002) and bleeding (OR= 3.00, 95 % CI 1.09- 8.27, P= 0.03), and there were no differences in other complications. Subgroup results indicated that the overall mortalities were obviously decreased in surgery with intraperitoneal chemotherapy + MMC (OR= 0.35, 95 % CI 0.20-0.62,P=0.000 3)or CDDP+5-Fu(OR=0.32,95 % CI 0.17-0.61,P=0.000 5)compared with surgery alone. Conclusions Surgery with intraperitoneal chemotherapy can improve survival rate of AGC cases over a period of time and reduce mortality and peritoneal recurrence, but it is likely to cause the morbidities.The safety needs to be improved in the future.
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BACKGROUND:Scholars around the world have attributed to establish the animal models of intervertebral disc degeneration (IVD) to imitate the IVD pathological manifestations by changing mechanical properties of the intervertebral disc, annulus fibrosus injury, and enzymatic method. OBJECTIVE:To establish the IVD model by nucleus aspiration and partial annulus incision, and to compare the modeling effects of the two methods.METHODS:Twenty 6-month-old New Zealand white rabbits were selected, in which the IVD models were then induced by nucleus aspiration (group A) or partial annulus resection (group B) of surgical y exposed L3-4, L4-5:group A, subjected to annulus puncture with a 16-gauge needle and 10-second negative pressure sunction;group B, about 1/2 part of the annulus (1 mm×2 mm) was cut under microscope, careful not to make a ful-thickness incision. MRI, X-ray examinations and Masson staining were performed at 1, 3, 5, 9, and 13 weeks after modeling. RESULTS AND CONCLUSION:X-ray examination:in the group B, the intervetebral space height began to decline in varying degrees at the 1st week postoperatively;in the group A, the intervetebral space height was decreased slightly at postoperative 1 and 3 weeks, and this reduction became obvious since the 5th week. The percentage of intervetebral space height in the group B was significantly higher than that in the group A at 3, 5 and 9 weeks postoperatively (P<0.05). MRI examination:the IVD could be induced by these two methods, and became severer with time, which was classified as grade 4 according to the modified Thompson grading criteria at the 9th week. The IVD degree in the group A was significantly severer than that in the group B at postoperative 1, 3 and 5 weeks (P<0.05). Masson staining showed that the IVD degree became severe with time in both two groups (P<0.05). Both two methods can induce the IVD. Besides, the IVD degree caused by the partial annulus incision is slighter than that of the nucleus aspiration within 5 weeks, and the incision site is a potential target of annulus repair.
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Objective:To study daily maintenance and quality control of high pressure steam sterilizer in the hospital to provide effective methods and suggestions for medical equipment maintenance.Methods: 6 high-pressure steam sterilizers were selected and divided into three groups according to the brands and the departments which use them, in order to compare the data, analyze equipment failure, improve the maintenance process and control the risks.Results:The equipment failure rate reduced lower than 21% through the improvement of maintenance. And the equipment utilization rate was above 95% through improving personnel training. Conclusion: The pertinence of the medical equipment maintenance and training is of great significance to carrying out effective regular maintenance of equipment by the office personnel, and it can reduce the failure rate and ensure the equipment operate safely.
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Objective To assess the prevalence of AIDS-related sexual behaviors and HIV infection status in young men who have sex with men (YMSM) in China.Methods Literature retrieval was conducted to obtain the related literature indexed by CNKI,Wangfang and PubMed databases from January 2005 to February 2015.Two reviewers independently screened the literature according to the inclusion and exclusion criteria,extracted data and assessed the methodological quality.Meta-analysis was performed by the R software.Results Thirty seven studies involving 32 110 YMSM were included.75.5％ (95％ CI:68.8％-81.2％) YMSM sought sexual partners through Internet and 65.5％ (95％CI:60.0％-70.6％) had more than 2 sexual partners.In the last 6 months,89.1％ (95％ CI:84.2％-92.6％) YMSM had anal intercourse and 42.0％ (95％ CI:37.4％-46.6％) used condom consistently;11.4％ (95％CI:8.4％-15.4％) had vaginal intercourse and 36.9％ (95％CI:32.4％-41.6％) used condom consistently.The pooled prevalence of HIV infection was 5.0％ (95％CI:3.9％-6.5％),sub-group analysis showed that the prevalence of HIV infection in the eastern,central and western China were 4.2％ (95％CI:2.6％-6.6％),1.9％ (95％C1:0.8％-4.6％),6.3％ (95％ CI:4.7％-8.5％),respectively,and there were significant differences among different areas.Conclusion The prevalence of AIDS-related risk sexual behaviors and incidence of HIV infection in YMSM were high in China,it is necessary to conduct AIDS intervention in this population.
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Objective To assess the prevalence of AIDS-related sexual behaviors and HIV infection status in young men who have sex with men (YMSM) in China.Methods Literature retrieval was conducted to obtain the related literature indexed by CNKI,Wangfang and PubMed databases from January 2005 to February 2015.Two reviewers independently screened the literature according to the inclusion and exclusion criteria,extracted data and assessed the methodological quality.Meta-analysis was performed by the R software.Results Thirty seven studies involving 32 110 YMSM were included.75.5％ (95％ CI:68.8％-81.2％) YMSM sought sexual partners through Internet and 65.5％ (95％CI:60.0％-70.6％) had more than 2 sexual partners.In the last 6 months,89.1％ (95％ CI:84.2％-92.6％) YMSM had anal intercourse and 42.0％ (95％ CI:37.4％-46.6％) used condom consistently;11.4％ (95％CI:8.4％-15.4％) had vaginal intercourse and 36.9％ (95％CI:32.4％-41.6％) used condom consistently.The pooled prevalence of HIV infection was 5.0％ (95％CI:3.9％-6.5％),sub-group analysis showed that the prevalence of HIV infection in the eastern,central and western China were 4.2％ (95％CI:2.6％-6.6％),1.9％ (95％C1:0.8％-4.6％),6.3％ (95％ CI:4.7％-8.5％),respectively,and there were significant differences among different areas.Conclusion The prevalence of AIDS-related risk sexual behaviors and incidence of HIV infection in YMSM were high in China,it is necessary to conduct AIDS intervention in this population.
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Objective To investigate the correlation and clinicopathological features of ATAD2 and E-cadherin expression in human hepatocellular carcinoma (HCC),and role of ATAD2 in HCC cells invasion and metastases.Methods The expressions of ATAD2 and E-cadherin in 90 HCC specimens and 16 specimens collected from peritumoral tissue were detected by immunohistochemistry (IHC) test.The correlations between ATAD2 and E-cadherin expression and clinicopathological features were analyzed.The lentiviral vector of sh-ATAD2 RNA was used to interfere with ATAD2 expression.Western blot was performed to evaluate the changes of E-cadherin and Vimentin expression in HCC cells after ATAD2 expression interference.The role of ATAD2 in HCC cells invasion and metastasis was assessed by Transwell analysis.Results ATAD2 protein expression was obviously upregulated in HCC tissue compared to peritumoral tissue (56.7％ vs.31.3％,P ＜ 0.05).Meanwhile,E-cadherin expression was significantly downregulated in HCC tissue (43.3％ vs.68.7％,P ＜0.05).ATAD2 and E-cadherin expressions were both correlated with HCC metastasis (P ＜ 0.05).Correlation analysis demonstrated that the ATAD2 expression was negatively correlated with E-cadherin (r =-0.263,P ＜ 0.05).After interfering ATAD2 expression,cell migration and invasion of HCCLM3 cells were suppressed (migration,42.5 ± 2.6 vs.78.1 ± 3.8,P ＜ 0.05;invasion,33.0 ± 4.7 vs.72.7 ± 5.6,P ＜ 0.05).Meanwhile,the E-cadherin expression was remarkably upregulated (P ＜ 0.05).However,the Vimentin expression downregulated (P ＜ 0.05).Conclusions ATAD2 expression was upregulated in HCC,and silencing ATAD2 could upregulate E-cadherin expression and downregulate Vimentin expression,and inhibit the invasion and metastasis of HCC cells.Modulating E-cadherin expression may be the potential mechanism of ATAD2 in HCC invasion and metastasis.
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BACKGROUND:In recent years, animal models of lumbar disc degeneration have been popularized to explore the effect of tissue engineering, cel engineering and genetic engineering technologies on intervertebral disc degeneration. OBJECTIVE: To investigate the influence of biological patches on rabbit anulus fibrosus repair. METHODS:L3-4, L4-5, L5-6 segments from rabbits were randomly divided into normal control group (the intervertebral disc was exposed correspondingly), control group (the annulus fibrosus was only cut with a surgical scalpel) and experimental group (the annulus fibrosus was cut and sutured with the surgical biomaterial). Six rabbits were selected randomly to take the lumbar X-ray and MRI preoperatively and 1, 2, 4, 8, 12 weeks postoperatively; one rabbit was chosen preoperatively and three rabbits selected respectively at 1, 2, 4, 8, 12 weeks postoperatively to execute hematoxylin-eosin and type II colagen immunohistochemistry. RESULTS AND CONCLUSION:At postoperative 1, 2 and 4 weeks, the disc height index decreased significantly in the control and experimental groups. MRI and histopathological examination showed that the T2WI signal intensity and hematoxylin-eosin grading were both increased significantly in the control and experimental groups at 2 weeks after surgery (P < 0.05). With time, the number of nucleus pulposus cels gradualy reduced in the control and experimental groups. Annulus fibrosus defects were filed with granulation and fibrous tissues, and the biofilm was tightly fused with the annulus fibrosus. Findings from the type II colagen immunohistochemical staining showed that the histological staining of the nucleus pulposus was gradualy changed from positive to negative in the experimental and control groups. Therefore, cutting the annulus fibrosus can lead to severe disc degeneration at early period, and surgical biomaterials can be integrated with the annulus fibrosus wel to seal annulus fibrosus defects and further prevent nucleus pulposus protrusion. However, this approach cannot restrain the continuous process of disc degeneration.
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BACKGROUND:So far, the pathogenesis of discogenic low back pain is poorly understood. A great diversity of therapeutic means is developed for discogenic low back pain, but the therapeutic outcomes are mixed. OBJECTIVE:To review the research progress in mechanisms and repair of intervertebral disc degeneration in recent years. METHODS: The first author retrieved the PubMed and CNKI databases for relevant articles published before November 2014 using the keywords of “disc degeneration factor, discogenic low back pain, disc degeneration therapy” in English and Chinese, respectively. Initialy, 78 relevant articles were retrieved, but only 30 articles were included in result analysis folowing elimination of duplicate studies. RESULTS AND CONCLUSION:The relatively respected factors for intervertebral disc degeneration include changes in morphology, inflammatory neurotransmitters and the extracelular matrix as wel as role of growth factors. The treatment for intervertebral disc degeneration stil focuses on the morphological restoration. Some surgical therapies, including percutaneous disc decompression, interbody fusion, artificial disc replacement, dynamic stabilization system, have the exact effects on the symptoms due to intervertebral disc degeneration.
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BACKGROUND:The pathogenesis of intervertebral disc degenerative disease has not been determined. To establish the ideal animal model of intervertebral disc degeneration is an important approach to study the pathogenesis or treatment of the disease. OBJECTIVE:To review model selection, modeling method and the advantages and disadvantages of the studies concerning various animal models of intervertebral disc degeneration. METHODS:We retrieved Wanfang database, China National Knowledge Infrastructure database, PubMed database and FMJS database for articles on animal models of intervertebral disc degeneration in vivo and in vitro published in recent five years al over the world. RESULTS AND CONCLUSION:The present literature shows that smal and medium-sized animals are now commonly used animal model. Building methods can be divided into two major categories of in vivo and in vitro models. The in vitro model revealed mechanism of intervertebral disc degeneration by the cel or tissue culture from the cel ular and molecular levels. In vivo model, different kinds of physical or chemical methods are used to intervene intervertebral disc, causing the intervertebral disc degeneration, proving the mechanism of intervertebral disc degeneration by the process of intervention. However, pathogenesis of human intervertebral disc degenerative disease is complex and has not been determined, so the current animal models are not comprehensive simulation of human intervertebral disc degenerative disease.
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To explore the therapeutic effect of micro-traumatic surgery of loose seton and cutting seton by rubber bands in the treatment of high anorectal fistulae.Application of cutting seton (truss rubber bands) implemented the high part of fistulae and loose seton (ligation rubber band but non-fastened) for the low part of fistulae.133/136 patients undergoing micro-traumatic surgery were cured by one operation,2 cases had pseudo-healing and there was 1 recurrent case.And the curative rate was 97.8％.The microtraumatic surgery of loose seton and cutting seton by rubber bands in the treatment of high anorectal fistula has such multiple advantages as small incision,minor trauma,lesser pain,faster healing and a shorter course of treatment.And it may preserve the proper anal function and the integrity of anal skin.And its clinical efficacy is satisfactory.
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Objective To investigate the effects of 810 nm semi-conductor laser irradiation on the proliferation of olfactory ensheathing cells in vitro. Methods Olfactory ensheathing cells obtained from adult rat olfactory mucosa using the method based on different rates of attachment were irradiated with a semi-conductor laser ( wave length 810 nm; power density 10.3 mW/cm2) for 30, 60 or 120 seconds. Laser irradiation was performed 3 times with a 24 h interval. After the last irradiation, the cells were cultured. At the 3rd, 5th and 8th day of cell culture,cell proliferation was assessed with cell counts and a methylthiazoletetrazolium ( MTT) colorometric method. Results After 3 days of cell culture, the number of cells and average MTT values showed no statistically significant difference between the irradiated and control groups. At the Sth and 8th day, the differences among all the laser exposure groups and with the control group were significant, except for the average MTT values of the control group and the 30 s exposure group. Maximal effect was achieved with a 60 s exposure. Conclusions Low power laser irradiation can stimulate the proliferation of olfactory ensheathing cells in vitro, and the effect is time-dose dependent. The optimal irradiation time was found to be 60 s daily for 3 times, with a 24 h interval.