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【Objective】 To analyze the status of HBV infection in blood donors reactive to jointed NAT but non-reactive to primary discriminatory tests (NRR), so as to provide suggestions and data support for subsequent studies on NRR samples. 【Methods】 HCV RNA and HIV RNA repeat differential detection, HBV DNA viral load detection and HBV pgRNA copy volume detection were performed in the plasma of 60 blood donors with negative ELISA results in routine blood screening and NRR in NAT. HBsAg, HBsAb, HBcAb, HBeAg and HBeAb serological tests were performed on the NRR samples with positivity in HBV DNA viral load and HBV pgRNA virus copy detection, so as to analyze the serological infection status and occult hepatitis B (OBI) infection. 【Results】 The HCV RNA and HIV RNA repeat discrimination results of 60 NRR samples were negative. The quantitative detection results of HBV DNA in 60 NRR samples were positive in 9 cases (15%), and the HBV DNA concentration was less than 10IU/mL. Nine cases (15%) were positive for HBV pgRNA quantitative detection, and the virus copy volume ±SD was (289±58.25) copies/mL. Two NRR samples (3.33%) were HBV DNA positive and HBV pgRNA positive. Among the 9 HBV-DNA positive samples, the highest positive rate of HBcAb was 66.67%, and 7 (77.78%) of them were confirmed to be seropositive for OBI. Among the 9 HBV pgRNA positive samples, the copy amount of pgRNA in HBcAb positive samples was slightly higher than that in negative samples, while the copy amount of pgRNA in HBsAb and HBeAb positive samples was lower than that in corresponding negative samples. In recent 6 years, the proportion of NRR samples in the single NAT system of the center fluctuated from 0.09% to 0.13%. 【Conclusion】 HBV DNA and HBV pgRNA exist in NRR samples. HBV DNA and/or HBV pgRNA positive samples can be detected in the relevant serological infectious markers. NRR samples have a certain potential risk of OBI infection. HBV DNA detection plus HBV pgRNA can better confirm the status of virus infection in NRR and improve the safety of blood transfusion.
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BACKGROUND: The most current application of compound porcine cerebroside and gangiioside injection (CPCGI) focuses on the clinical therapeutic efficacy in some craniocerebral injuries and neonatal hypoxic ischemic encephalopathy, but the molecular mechanism of CPCGI involved in the recovery of nerve function is rarely reported. OBJECTIVE: To study the protective effect and mechanism of CPCGI in a neonatal mouse model of intrauterine hypoxia-induced brain injury. METHODS: Fifteen Kunming mice were randomly divided into control group, hypoxia group and treatment group. At the 14th day after pregnancy, mice in hypoxia group and treatment group were put into a 10% oxygen incubator to make the model of intrauterine hypoxia. After delivery, neonatal mice were intraperitoneally injected with CPCGI and PBS respectively, and mouse development in each group was observed after treatment. Mice in the control group were not hypoxic and treated. The expression of glial fibrillary acidic protein, Neurocan, SynDIGI and collagen IV were observed by immunofluorescence staining and western blot assay. A step-down test was used to test animal memory function. The study protocol was approved by the Animal Ethic Committee of Luohe Medical College in China. RESULTS AND CONCLUSION: Compared with the control group, the expressions of glial fibrillary acidic protein and Neurocan in the hypoxia group were significantly increased, while the expressions of SynDIGI and collagen IV were significantly decreased. The expression of SynDIGI and collagen IV in the treatment group was significantly increased than that in the hypoxia group, while the expression of glial fibrillary acidic protein and Neuroncan was significantly decreased than that in the hypoxia group. The learning and memory ability of mice in the hypoxia group was significantly decreased compared with the control group, but was significantly improved after CPCGI treatment. These results suggest that CPCGI can alleviate brain injury and improve learning and memory ability after hypoxic ischemic encephalopathy. The detailed mechanism might be related to inhibiting activation of astrocytes, down-regulating Neuroncan expression, up-regulating collagen IV expression, promoting synaptic reconstruction and reducing cerebrovascular injury.
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Objective:To evaluate the bactericidal effects of nano-silver against Enterococcus faecalis(E.faecalis) growing in multi-species biofilm.Methods:85 biofilms were established using MBECTM P&G Assay with E.faecalis together with Fusobacterium nucleatum and P.melaninogenica.Thereafter,10 specimens were used as the controls,75 were randomly divided into 3 groups(n=25),and treated with 0.1% nano-silver (12-15 nm) solution,0.1% nano-silver (100 nm) solution and 2% hypochlorite solution,respectively.Each sample was then separated into 2 different tubes.PMA was added to one of the tubes,and the other was left untreated.Then,DNA extraction and qPCR were performed.The cycle threshold(Ct) values between samples were compared by paired t test.Results:The Ct values of the samples treated with PMA were higher than that without PMA(P=0.000) in the group of 0.1% nano-silver solution(12-15 nm)was higher than that in the group of 0.1% nano-silver solution(100 nm)and 2% sodium hypochlorite solution.(P<0.05);the value in the group of 0.1% nano-silver solution(100 nm)was larger than that in 2% sodium hypochlorite solution(P<0.05).Conclusion:0.1% nano silver solution might have a strong bactericidal effect against against E.faecalis growing in multi-species biofilm.The bactericidal effect may be enhanced with the small size of silver particles.
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Objective:To analyse viable Enterococcus faecalis(E.faecalis)in root-well-filled teeth associated with failed endodontic treatment by using propidium monoazide (PMA)in combination with real time qPCR.Methods:Bacterial samples were extracted from 34 root-canal-treated teeth with post-treatment apical periodontitis.Each sample was separated into 2 different tubes.PMA was added to one of the tubes,and the other was left untreated.Then,DNA extraction and qPCR were performed.Results:E.faecalis was found in 20 of the 34 samples(58.8%).In PMA treated and none-treaten samples the Ct value of E.faecalis was 25.1 2 ±2.04 and 24.62 ± 2.02 respectively(P =0.001 ).Conclusion:PMA may be feasible in differentiating viable and dead Enterococcus faecalis cells.
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Objective To investigate the expression of Notch1,Delta-like ligand 4 (DLL4),hairy and enhancer of split-1 (HES-1),microvessel density (MVD),lymphatic vessel density (MLD) in gastric carcinoma,so as to discuss their roles in the development of gastric carcinoma.Methods Gastric carcinoma,paracancer tissues which was apart from the edge of cancer tissue ＞ 60 mm obtained during operation and normal gastric mucosa obtained during gastroscopy were used as controls.All specimens were made tissue microarray.The expressions of Notchl,DLL4,HES-1 were detected by immunohistochemistry.Immunohistochenical double taining was used to detect MVD and MLD.The relationships between Notch1,DLL4,HES-1 expression and angiogenesis,lymphangiogenesis and their significances were analyzed.Results The positive rate of Notch1 in gastric carcinoma was 48.30％,significantly higher than that of paracancerous (25.00％,x2 =6.38,P ＜ 0.05) and control group (16.67％,x2 =10.18,P ＜0.05).The differences of the positive rate of DLL4 in gastric carcinoma (55.94％),paracancerous (45.70％) and control group (56.67％) were not significant (x2 =1.18,P ＞0.05 ; x2 =0.005,P ＞ 0.05).The differences of the positive rate of HES-1 in gastric carcinoma (36.64％),paracancerous (34.40％) and control group (33.33％) were not significant (x2 =0.05,P ＞ 0.05 ;,x2 =0.11,P ＞ 0.05).The mean of MVD in gastric carcinoma group was 28.84 ± 14.17,which was significantly higher than that in paracancerous group (17.02 ±8.54,t =4.03,P＜0.05) and control group (16.69 ±7.21,t =5.01,P＜0.05).The mean of MLD in gastric carcinoma group was 8.55 ±4.98,which was significantly higher than that in paracancerous group (4.05 ± 2.48,t =9.30,P ＜ 0.05) and control group (3.99 ± 1.56,t =10.32,P ＜ 0.05).The expression of DLL4 was correlated with MVD (t =2.77,P ＜ 0.05),but wasn't correlated with MLD (t =1.89,P ＞0.05).There were no correlations between the expression of Notch1,HES-1 and tissues MVD,MLD (P ＞0.05).Conclusion Notch1 plays important roles in the development of gastric carcinoma.There are many angiogenesis and lymphangiogenesis in gastric carcinoma.The expression of DLL4 in gastric carcinoma has certain effect in the formation of microvessel.
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On the basis of ‘ cooperation between schools and hospitals’,teaching of specialized course of clinical medicine in the second academic year was arranged in affiliated hospitals and teaching hospitals.According to the teaching content and features of specialized courses,flexible teaching methods were adopted,including theoretical instruction,bedside teaching,case studies,situational teaching,integration of teaching,practicing and studying and clinical internships etc.Through selecting and training qualified teachers,establishing practical training base and strengthening teaching management and quality control,the quality of teaching was effectively guaranteed and satisfactory teaching effect was received.
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[Objective]To investigate the treatment of fractuees of distal end of humerus with open reduction and internal fixation with anatomical plate.[Method]From February 2001 to April 2006,open reduction and anatomical plate internal fixation were performed in 22 cases with distal end of humerus fracture,of which olecranon osteotomy approach was carried out in 11 while musculus triceps brachii linguiform flap approach in other 11.All the patients received combined therapy including fumigation and rinsing with Chinese herbs,CPM(continuous passive motion) and manipulation.[Result]All the cases were followed up for 13 to 22 months.All the fractures got union.The postoperative elbow functions were excellent in 9 cases,good in 7 cases according to Mayo standards.The satisfactory rate was 72.71%.[Conclusion]Open reduction and internal fixation with anatomical plate can provide stable fixation and allow early postoperative elbow functional training in treatment of distal humerua fracture.Good clinical results can be achieved using fumigation and rinsing with Chinese herbs,CPM and manipulation after operation.