A multicenter survey of antibiotic use in very and extremely low birth weight infants in Hunan Province / 中国当代儿科杂志

OBJECTIVE@#To investigate the current status of antibiotic use for very and extremely low birth weight (VLBW/ELBW) infants in neonatal intensive care units (NICUs) of Hunan Province.@*METHODS@#The use of antibiotics was investigated in multiple level 3 NICUs of Hunan Province for VLBW and ELBW infants born between January, 2017 and December, 2017.@*RESULTS@#The clinical data of 1 442 VLBW/ELBW infants were collected from 24 NICUs in 2017. The median antibiotic use duration was 17 days (range: 0-86 days), accounting for 53.0% of the total length of hospital stay. The highest duration of antibiotic use was up to 91.4% of the total length of hospital stay, with the lowest at 14.6%. In 16 out of 24 NICUs, the antibiotic use duration was accounted for more than 50.0% of the hospitalization days. There were 113 cases with positive bacterial culture grown in blood or cerebrospinal fluid, making the positive rate of overall bacterial culture as 7.84%. The positive rate of bacterial culture in different NICUs was significantly different from 0% to 14.9%. The common isolated bacterial pathogens Klebsiella pneumoniae was 29 cases (25.7%); Escherichia coli 12 cases (10.6%); Staphylococcus aureus 3 cases (2.7%). The most commonly used antibiotics were third-generation of cephalosporins, accounting for 41.00% of the total antibiotics, followed by penicillins, accounting for 32.10%, and followed by carbapenems, accounting for 13.15%. The proportion of antibiotic use time was negatively correlated with birth weight Z-score and the change in weight Z-score between birth and hospital discharge (r=-0.095, -0.151 respectively, P<0.01), positively correlated with death/withdrawal of care (r=0.196, P<0.01).@*CONCLUSIONS@#Antibiotics used for VLBW/ELBW infants in NICUs of Hunan Province are obviously prolonged in many NICUs. The proportion of routine use of third-generation of cephalosporins and carbapenems antibiotics is high among the NICUs.

Effect of cell penetrating peptide TAT-modified liposomes loaded with salvianolic acid B on proliferation,migration and cell cycle of human skin fibroblasts / 中国中药杂志

Hypertrophic scar( HS) is a very common skin fibrosis disorder after human skin injury and wound healing. The objective of this study was to investigate the efficacy of cell penetrating peptide TAT-modified liposomes loaded with salvianolic acid B( SAB-TAT-LIP) on proliferation,migration and cell cycle of human skin fibroblasts( HSF),and preliminarily evaluate its effect on prevention and treatment of HS. HSF were cultured in vitro,and MTT assay was used to detect the inhibitory effect of SAB-TAT-LIP on cell proliferation. Cell migration was assessed by Transwell chamber method and scratch method; and cell cycle change was detected by flow cytometry. In vitro cell studies showed that blank liposome basically had no toxic effect on HSF. Different concentrations of SABTAT-LIP inhibited proliferation on HSF in varying degrees after intervention for different periods in a dose and time dependent manner;meanwhile,SAB-TAT-LIP significantly inhibited the migration and invasion of HSF. At the same time,SAB-TAT-LIP could block the cell cycle at G0/G1 phase after intervention for 48 h,P<0.01 as compared with the blank control group. Conclusively,our experimental data quantitatively demonstrate that SAB-TAT-LIP has significant inhibitory effect on cells proliferation,invasion and migration,with blocking effect on G0/G1 phase. This may offer a promising therapeutic strategy for transdermal delivery in prevention and treatment of HS.

Serum epidemiology of five strong pathogenicity human adenoviruses natural infection in Tupaia belangeri / 中国人兽共患病学报

In order to explore the possibility of human adenovirus infection with tree shrews,the neutralizing antibody ti-ters of five kinds of human adenoviruses (HAdv)in the serum of tree shrews were analyzed.The levels of Ad3,Ad4,Ad7, Ad14 and Ad55 neutralizing antibody were detected by virus neutralization test.The results showed that the positive rate of four adenoviruses in group B were higher than Ad4 in group E,and the positive rates respectively were Ad14 (55.88%),Ad3 (47.06%),Ad55 (29.71%),Ad7 (14.71%)and Ad4 (8.82%).The antiserum mainly mixed with Ad3,Ad14 and Ad55 anti-body.Five species of human adenovirus can be naturally infected with tree shrews.Tree shrews are used as experimental ani-mals to establish human adenovirus infection model is alternative.

Discussion on the Remote Medical Service Mode Based on Medical Alliance / 医学信息学杂志

The paper analyzes the remote consultation medical service mode based on medical alliance with SWOT analysis method from the aspects like advantages,disadvantages,opportunities and threats,and expounds on its organizing structure and specific service mode to integrate remote medical service into medical alliance better,which will contribute to the medical career.

Design and Implementation of Performance Management Information System of Traditional Chinese Medicine Project / 医学信息学杂志

The paper introduces the rebuilding target of the performance management information system for Traditional Chinese Medicine (TCM) project.By expounding on system architecture,function realization,security design and its application of virtual private channel and electronic signature technology based on secure socket layer,it points out that the system helps promote the informatization building of performance management for TCM project.

The effect of radical gastrectomy plus Roux-en-Y digestive tract reconstruction on accompanying type 2 diabetes mellitus / 中华普通外科杂志

Objective To evaluate the curative effect of laparoscopic radical gastrectomy combined with Roux-en-Y reconstruction of the digestive tract in treatment of advanced gastric cancer complicated with type 2 diabetes mellitus.Methods 73 advanced gastric cancer complicated with type 2 diabetes mellitus patients between May 2014 to May 2016 underwent distal partial gastrectomy or total gastrectomy with Rouxen-Y GI reconstruction.Results Compared with preoperative data,postoperative level at after 1 month and 3 months were respectively for FPG (14.9 ± 1.9 vs.8.7 ± 0.9,8.8 ± 0.9) mmol/L,OGTT 2 h PG (15.4±1.8 vs.8.68±0.9,8.7 ±0.9) mmol/L,HbA1 (10.4％ ±0.8％ vs.7.4％ ±0.6％,7.4± 0.6),BMI (29.9±1.2vs.25.4±0.7,25.2±0.6) kg/m2,TC (8.4±0.6 vs.6.7±0.6,6.7±0.4) mmol/LandTG (2.53±0.53 vs.1.86±0.27,1.91±0.33) mmol/L(withallP＜0.05).Conclusion Laparoscopic radical gastrectomy combined with Roux-en-Y reconstruction of the digestive tract for advanced gastric cancer significantly improves patients' co-occurring.

The modified restriction of amino acids of HVR1, HVR2, HVR5, HVR7 in human adenovirus serotype 3 hexon / 病毒学报

The limitation of traditional Ad vectors result in wide application of capsid-incorporation of antigens into adenovirus capsid proteins, but usually it can't rescue virus successfully when we engineered the hypervariable regions (HVRs) of hexon in adenovirus serotype 3(Ad3) vector. So we deleted or retained some amino acids in HVR1, HVR2, HVR5, HVR7 predicted by bioinformatics, constructed recombinant Ad3 vector pBRAddeltaE3GFP-mHexon, and transfected it into AD293 cell to confirm the influence on the virus rescue. These data of amino acids that can be deleted or retained in the HVRs of Ad3 vector should provide operating foundation for antigen capsid-incorporation strategy in human adenovirus serotype 3, and also lay the groundwork for application of expressing foreign antigens in the hexon of human adenovirus serotype 3 as a platform of multivalent vaccine vectors.

Population intervention of thalassemia relying on family planning service system / 中华医学遗传学杂志

<p><b>OBJECTIVE</b>To set up thalassemia population intervention model in order to decrease the birth of thalassemia major, relying on population and family planning service system.</p><p><b>METHODS</b>Pregnant women and their husbands were educated about thalassemia, and participated in screening and prenatal diagnosis if the couple were carriers of thalassemia in the areas of Huangpu, Panyu, Zengcheng and Tianhe districts of Guangzhou.</p><p><b>RESULTS</b>The network of thalassemia intervention mainly dependent on family planning service system was set up in these regions. A total of 10 695 families participated in thalassemia screening and 16 thalassemia major fetuses were diagnosed in the last two years. No one was thalassemia major in the 8360 newborn.</p><p><b>CONCLUSION</b>Thalassemia population intervention model was set up relying on family planning service system and it significantly decreased the birth of thalassemia major.</p>

Experience of the diagnosis and treatment of primary small intestine lymphoma / 中华外科杂志

<p><b>OBJECTIVE</b>To report the experiences of the diagnosis and treatment of primary lymphoma of the small intestine (PSIL).</p><p><b>METHODS</b>The clinical data of 15 patients with PSIL treated from January 2003 to July 2007 was investigated retrospectively. Of the 15 cases, 9 patients were male and 6 were female, the average age was 51.6 years (range, 18 - 73 years). Data of gender, age, clinical manifestation, laboratory examination, imageology examination, diagnosis and treatment of the patients was reviewed.</p><p><b>RESULTS</b>The most common clinical manifestations were as follow: abdominal pain, abdominal lump, bowel obstruction, gastrointestinal hemorrhage and athrepsy. Serum tumor markers were checked normal. All the 15 cases were found with tumor by spiral CT, and 12 cases were diagnosed as PSIL. Eleven cases were given Ba-meal examinations, and positive results was found in 4 cases, and only 1 case was considered to be PSIL. All the 15 patients received operation. All the patients were diagnosed as non-Hodgkin lymphoma (NHL) by postoperative pathology (8 patients as diffuse large B-cell lymphoma, 5 as mucosa associated lymphoid tissue type B cell lymphoma and 2 as enteropathy-type intestinal T cell lymphoma). No perioperative death occurred. Ten patients received adjuvant chemotherapy with the regimen of CHOP (cyclophosphamide + epirubicin + vincristine + prednisone) after the operation. Fourteen cases were followed-up for a mean time of 30 months (range, 6 - 52 months). The 1- and 3-years survival rate was 85.7% and 57.1%, respectively.</p><p><b>CONCLUSIONS</b>PSIL has no specific clinical manifestations, the diagnostic rate with barium study is low, spiral CT scan is a promising diagnostic method for PSIL. Operation combined with chemotherapy is important for PSIL.</p>

Experimental study of NK4 gene targeted therapy mediated by human telomerase reverse transcriptase promoter for colon cancer / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To investigate anti-tumor effect of the recombined adenovirus encoding NK4 gene regulated by human telomerase reverse transcriptase (HTERT) promoter (Ad HTERTp-NK4) on human colon cancer.</p><p><b>METHODS</b>Colon cell line HCT116 was infected with Ad HTERTp-NK4. NK4 expression was determined by RT-PCR and Western blot. The cell-growth inhibition rate and the invasive capacity of cells were evaluated by MTT method and reconstituted basement membrane invasion assay. The model of subcutaneous tumor was generated by injection of HCT116 cells into the dorsum of nude mice. Ad HTERTp-NK4 was injected around the tumor tissues, and tumor growth was observed.</p><p><b>RESULTS</b>NK4 gene was highly expressed in infected HCT116 cells. The cell growth inhibition rate and the invasive inhibition rate in Ad HTERTp-NK4 cells were 47.14% and 40.63% respectively, which were significantly higher than those in the control cells (2.75% and 2.31%, P<0.05). Tumor growth was significantly inhibited in mice injected with Ad HTERTp-NK4, and the tumor growth inhibition rate was 47.3%, which was significantly higher than that in the controls (4.6%, P<0.05).</p><p><b>CONCLUSION</b>Ad HTERTp-NK4 can inhibit tumor growth and decrease the invasive capacity of tumor cells, which makes it an ideal candidate for new gene therapy for colon carcinoma.</p>

Preparation and characterization of specific monoclonal antibodies against hexon of HAdV 3 / 南方医科大学学报

<p><b>OBJECTIVE</b>To obtain the monoclonal antibody against hexon protein of human adenovirus.</p><p><b>METHODS</b>BALB/c mice were immunized with purified recombinant hexon protein, and the spleen cells of the mice were isolated and fused with myloma cells. Four hybridoma cell strains were screened by indirect ELISA and cultured, and the sensitivity, specificity and virus neutralizing activity were analyzed with ELISA, Western blotting and neutralizing test.</p><p><b>RESULTS</b>The mouse ascites produced by these hybridoma cells contained specific monoclonal antibodies against hexon protein of human adenovirus as identified by ELISA and Western blot, and the antibody generated by 4C6 strain showed human adenovirus type 3-neutralizing activity.</p><p><b>CONCLUSION</b>The monoclonal antibodies against hexon protein with high specificity have been successfully obtained, and these antibodies can be useful in developing assays for early diagnosis of HAdV3 infection and also in study of therapeutic drugs of the infection.</p>

Cloning, expression and immunocharacterization of the capsid protein of human Norwalk virus Guangzhou strain NVgz01 / 南方医科大学学报

<p><b>OBJECTIVE</b>To clone, express and characterize the capsid protein of human Norwalk virus Guangzhou strain NVgz01.</p><p><b>METHODS</b>On the basis of successful construction of full-genome clones and sequence analysis of human norovirus Guangzhou strain NVgz01, the full capsid gene was ligated into pET28a (+) for expression. After IPTG induction, the recombinant protein was purified through metal (Ni(2+)) chelating affinity chromatography. Western blotting and enzyme-linked immunosorbent assay (ELISA) were used to determine the antigenicity of the recombinant protein.</p><p><b>RESULTS</b>The recombinant capsid gene was overexpressed in E.coli, yielding the recombinant protein with relative molecular mass of 62x10(3) that was highly purified through metal (Ni(2+)) chelating affinity chromatography. IDEIA Norovirus Kit and immunoassay showed that the recombinant protein had good antigenicity.</p><p><b>CONCLUSION</b>The capsid gene of norovirus Guangzhou strain has been cloned and expressed, which can be useful for developing diagnostic reagents or vaccine of norovirus.</p>