Objectives Through analyzing the published scientific papers by the professionals of the Center for Disease Control and Prevention of Guangdong Province(GDCDC) from 2001 to 2006,to put forward some suggestions for the research management,the discipline development and the personnel training.Methods Literature quantitative analysis and health statistics methods were used to analyze these papers.Results The professionals of GDCDC published a total of 924 papers with an annual average of 154 in 114 kinds of periodicals from 2001 to 2006 of the 924 papers.264 papers(28.6%) were published in the key Chinese periodicals,320 papers(34.6%)in the South China Journal of Preventive Medicine,68 papers (7.4%)in the Chinese Journal of Health Laboratory Technology and 51 papers(5.5%)in the China Public Health.Of the 924 papers,433 papers(46.9%)belonged in the field of health laboratory technology,354 papers(38.3%)in the field of disease prevention and control,and 70 papers(7.6%)in the field of public health.During the six years,79.2% of the total professionals Published at least one paper,58professionals published at least six papers.Of the 924 corresponding authors.56.8% aged 30～40 years old.48.9% had a bachelor degree,and 45.9% had a senior professional title.Conclusions In recent years,the quantity and quality of papers published by the professionals of GDCDC were improved.The professional's ability to conduct scientific research was enhanced and the research level of GDCDC wag raised year by year.The predominant specialties of the academic research were in the field of health laboratory technology and disease prevention and control.But the professional work and discipline development of Public health should be sirengthened further.

Objective To explore the clinical efficacy of minimally invasive posterior reconstructive plating by parallel Kirschner wires in the treatment of unstable posterior pelvic fractures.Methods From January 2013 to December 2016,29 patients with unstable posterior pelvic fracture were treated at Trauma Center,Liuzhou Workers' Hospital.They were 22 men and 7 women,aged from 19 to 65 years (mean,44.2 years).By the Tile classification,10 cases were classified as type B and 19 as type C.The delay from injury to surgery ranged from 4 to 14 days (mean,8.7 days).All the patients received minimally invasive posterior fixation with a U-shaped reconstructive plate and parallel Kirschner wires.The length of incision,intraoperative bleeding,operation time,quality of fracture reduction,curative effects and complications at the last follow-up were recorded.Results The length of intraoperative unilateral incision ranged from 2.3 to 3.4 cm (average,2.99 cm);the volume of intraoperative bleeding ranged from 47 to 88 mL (average,69.9 mL);the average operation time ranged from 17 to 34 min (average,25.2 min).One patient was lost to the follow-up.The other 28 patients were followed up for 14 to 26 months (average,18.3 months).The fracture healing time ranged from 8 to 15 months (average,10.1 months).According to the Matta criteria for fracture reduction,17 cases were rated as excellent at the last follow-up,9 as good,one as fair and one as poor,giving an excellent to good rate of 92.9％.According to the Pohlemann functional scoring,14 cases were rated as excellent,11 as good,2 as fair and one as poor,giving an excellent to good rate of 89.3％.Conclusion In the treatment of unstable posterior pelvic fractures,minimally invasive posterior reconstructive plating by parallel Kirschner wires presents advantages of high security,limited surgical trauma,good curative effects and limited postoperative complications.

After an overall introduction of the novel functions of the CMCI institutional knowledge version developed by Medical Library of Chinese PLA , its coverage of institutions, authors, funds, journals and literature was de-scribed in terms of RDE semantics.The contents in literature were mined and analyzed in depth based on the litera-ture-marked information with the institutions database, funds database, journals database and literature database as their cores, the association of information resources in biomedical field was thus realized.The CMCI institutional knowledge version can be used to search published papers and citations, write citation reports, enforce bibliometric visualization analysis, issue different top-ranked statistical data, push associated information, increase institutional literature management modules, and provide personal literature management and assessment service for different in-stitutions.

Objective To investigate the incidence of enteric pathogens causing acute gastroenteritis (AGE) among children to measure the incidence of coinfections,and to compare the clinical characteristics of those infected with one versus multiple agents.Methods A retrospective study was conducted from January 2014 to December 2014.All patients between 1 month and 14 years of age admitted to the Pediatric department with a diagnosis of AGE were eligible for enrollment.Two stool samples for each patient were tested for gastrointestinal pathogens.We summarized the clinical severity of episodes,describing the duration of diarrhea,duration and frequency of vomiting,fever.All patients underwent medical evaluation with estimation of dehydration.Results One or more etiological agents were detected in 3595 out of 4728 patients(76.0％),while we did not detect any etiological agent in 1133 (24.0％).Rotavirus was detected in 1889 (40.0％),adenovirus in 412 (8.7 ％),norovirus in 309 (6.5 ％),verotoxigenic Escherichia coli (VTEC) in 274 (5.8 ％),Salmonella spp.in 276(5.8％),Klebsiella pneumoniae in 123 (2.6％),Shigella spp.in 78 (1.6％),Staphylococcus aureus in 70 (1.5％),C.perfringens in 126(2.7％).In 1370 children out of 4728(29.0％),we found evidence of coinfection.with rotavirus and norovirus was the most common 150 (3.2％),rotavirus and C.perfringens was also common 127(2.7％).Children with coinfection had a more severe clinical presentation.The difference has statistical significance.Conclusion Rotavirus is still the most common pathogen in children with acute diarrhea,followed by NV,adenovirus,Salmonella spp.and VTEC.Rotavirus with norovirus infection was the most common.VTEC combined with three kinds of virus infection had the highest incidence.Children with multiple viral infections were more severe than those of single virus infection in the duration of vomiting and dehydration.There was no significant difference in the duration of fever and diarrhea and the frequency of diarrhea.Children infected by viruses and bacteria had a more severe clinical presentation such as fever,vomiting and diarrhea lasting for a long time,more serious diarrhea and dehydration than those with single bacteria and single virus infection.The difference has no significant difference in degree and duration of diarrhea.

Objective To explore specific variables related to cisplatin induced acute kidney injury ,serum metabonomics techniques were applied and simultaneously the value of intervention effects of L-carnitine were appraised .Methods 19 mice were divided into the normal control group ,model group ,and intervention group ,After a three day accommodation period ,the intervention group was given L-carnitine (400 mg/kg ,ip) .Two days later ,cisplatin (20 mg/kg ,ip) was given to the model and intervention groups .The body weight of every mouse in each group was measured daily .Two days after the serum sample of each mice was collected and analyzed by LC-MS ,pattern recognition analysis of metabolomics differences among the groups , and the effectiveness of L-carnitine intervention were evaluated .Results A total of 28 metabolites were identified through ser-um metabolomics analysis .Our data shows that there is a possible mechanism that cisplatin induced AKI was mainly involved in changing phospholipids ,amino acid and fatty acid metabolic pathways and L-carnitine mitigates the damage of acute kidney in-jury induced by cisplatin .Conclusion L-carnitinecan alleviates cisplatin induced acute kidney injury by regulating tryptophan metabolism ,glutamate metabolism ,and energy metabolism .

Astragali Radix(AR)is a clinically used herbal medicine with multiple immunomodulatory activities that can strengthen the activity and cytotoxicity of natural killer(NK)cells.However,owing to the complexity of its composition,the specific active ingredients in AR that act on NK cells are not clear yet.Cell membrane chromatography(CMC)is mainly used to screen the active ingredients in a complex system of herbal medicines.In this study,a new comprehensive two-dimensional(2D)NK-92MI CMC/C18 column/time-of-flight mass spectrometry(TOFMS)system was established to screen for potential NK cell acti-vators.To obtain a higher column efficiency,3-mercaptopropyltrimethoxysilane-modified silica was synthesized to prepare the NK-92MI CMC column.In total,nine components in AR were screened from this system,which could be washed out from the NK-92MI/CMC column after 10 min,and they showed good affinity for NK-92MI/CMC column.Two representative active compounds of AR,isoastragaloside Ⅰ and astragaloside Ⅳ,promoted the killing effect of NK cells on K562 cells in a dose-dependent manner.It can thus suggest that isoastragaloside Ⅰ and astragaloside Ⅳ are the main immunomodulatory compo-nents of AR.This comprehensive 2D NK-92MI CMC analytical system is a practical method for screening immune cell activators from other herbal medicines with immunomodulatory effects.

Therapeutic drug monitoring(TDM)has played an important role in clinical medicine for precise dosing.Currently,chromatographic technology and immunoassay detection are widely used in TDM and have met most of the needs of clinical drug therapy.However,some problems still exist in practical appli-cations,such as complicated operation and the influence of endogenous substances.Surface plasmon resonance(SPR)has been applied to detect the concentrations of small molecules,including pesticide residues in crops and antibiotics in milk,which indicates its potential for in vivo drug detection.In this study,a new SPR-based biosensor for detecting chloramphenicol(CAP)in blood samples was developed and validated using methodological verification,including precision,accuracy,matrix effect,and extraction recovery rate,and compared with the classic ultra-performance liquid chromatography-ultraviolet(UPLC-UV)method.The detection range of SPR was 0.1-50 ng/mL and the limit of detec-tion was 0.099±0.023 ng/mL,which was lower than that of UPLC-UV.The intra-day and inter-day ac-curacies of SPR were 98％-114％and 110％-122％,which met the analysis requirement.The results show that the SPR biosensor is identical to UPLC-UV in the detection of CAP in rat blood samples;moreover,the SPR biosensor has better sensitivity.Therefore,the present study shows that SPR technology can be used for the detection of small molecules in the blood samples and has the potential to become a method for therapeutic drug monitoring.

Objective To explore the feasibility and clinical value of Ilizarov bone transport technique combined with bone graft and internal fixation at the docking site in the treatment of large segmental bone defect of the lower limbs.Methods Thirty patients with large lower limbs bone defects were prospectively divided into two groups according to the random number table:pure bone transport group (Ilizarov bone transport technique alone,n=lS,10 males and 5 females,average age 34.4±4.6 years old,2 cases bone defect of femur,13 cases tibia,and the length of bone defect 6.2±2.4 cm),and combined bone transport group (Ilizarov bone transport technique with bone graft and internal fixation at the docking site,n=lS,12 males and 3 females with the average age of 33.8±5.2 years,1 case of bone defect and 14 tibia,and the length of bone defect 6.5±2.2 cm).The preoperative hospital for special surgery (HSS) knee functional scores,Baird-Jackson ankle function scores,external fixation time,external fixation index,bone union time,bone union index,postoperative ASAMI scores and incidence of complications were compared between the two groups.Results All patients were followed up for 9 to 24 months (mean 16.2 months).Pure bone transport group was followed up for 9 to 24 months (mean 16.2 months),and combined bone transport group was 10 to 24 months (mean 16.4 months).In pure bone transport group,the external fixation time was 17.6±5.4 months,and the bone union time was 11.2±3.1 months with the average bone union index 42.4±4.6 d/cm.While in combined bone transport group,the external fixation time of group B was 8.4± 2.1 months,and the bone union time was 7.2±2.1 months with the average bone union index 21.1±2.7 d/cm.The external fixation index of pure bone transport group was 32.4±2.1 d/cm,while in combined bone transport group it was 32.1±2.5 d/cm,and there was no significant difference between these two groups (t=0.812,P=0.884).According to the bone and function score of the ASAMI,in pure bone transport group,bone healing:excellent 6 cases,good 6 cases,fair 2 cases,poor 1 case,excellent rate was 80％.While in combined bone transport group:excellent in 8 cases,good 6 cases,fair 1 case,excellent rate was 93.3％.The difference between the two groups was statistically significant (X2=10.6,P=0.032).The lower limb function in pure bone transport group:excellent in 5 cases,good in 5,fair in 4,poor in 1,excellent rate was 66.7％;while in combined bone transport group:excellent in 6 cases,good in 7,fair in 2,excellent rate was 86.7％.There was also a significant difference in the incidence of complications between the two groups.Conclusion Both the pure Ilizarov bone transport technique and the Ilizarov technique with bone graft and internal fixation at the docking site could satisfactorily treat the large bone defect and shortening of the lower limb.But the latter technique had shorter healing time,higher healing rates,better limb function and fewer complications.

Objective:To investigate the feasibility and clinical efficacy of percutaneous screw fixation for acetabular anterior column fracture with laser-assisted axial fluoroscopy.Methods:Data of 20 patients (22 sided) with acetabular anterior column fracture treated by percutaneous screw fixation with laser-assisted axial fluoroscopy from January 2017 to December 2018 were retrospectively analyzed. There were 11 males and 9 females with an average of 42.1±3.2 years (range, 24-68 years). There were 7 cases of unilateral acetabular anterior column fracture, 2 cases of bilateral acetabular anterior column fracture (4 sides), 7 cases of anterior column with ipsilateral sacral fracture, and 4 cases of anterior column with sacroiliac joint injury. There were 3 hips of Area I, 6 Area II, 13 Area III of acetabular anterior column fractures according to Nakatani partition. The time from injury to surgery was 5 days (range, 3-11 days). All patients with acetabular anterior column fractures were fixed by percutaneous screw fixation with laser-assisted axial fluoroscopy, and patients with sacral fracture or sacroiliac joint injury were fixed by percutaneous sacroiliac screws with Starr frame-assisted reduction. The time of operation, the number of intraoperative fluoroscopy and the amount of intraoperative bleeding were recorded. Matta scoring criteria were used to assess fracture reduction quality, and hip function was assessed at the last follow-up according to the modified Merle D' Aubigné and Postel scoring system.Results:The average operative time was 22±10 min (range, 20-40 min) with an average times of intraoperative fluoroscopy of 30±8 times (range, 21-45 times), and the amount of intraoperative blood loss was 20±5 ml (range, 10-40 ml). 20 patients were followed up after operation for a period of 14±3.1 months (range, 12-18 months). The quality of postoperative fracture reduction was assessed according to the Matta acetabular fracture reduction criteria: anatomical reduction in 18 hips, satisfactory reduction in 2 hips, unsatisfactory reduction in 2 hips, with an excellent and good rate of 91% (20/22). The fracture healing time was 13±2.2 weeks (range, 11-16 weeks). At the lastest follow-up, hip function was assessed according to the modified Merle D' Aubigné and Postel scoring system: excellent 18, good 3, fair 1, and the satisfactory rate was 95%(21/22). No major neurological, vascular injury, wound infection and ectopic ossification were found during follow-up.Conclusion:Using laser-assisted axial fluoroscopy percutaneous screw to treat acetabular anterior column fracture, the operation is simple. And there is low risk to damage important blood vessels and nerves. This method can shorten the operation time of acetabular anterior column fracture, reduce the amount of blood loss during the operation, and the outcome is satisfactory.

P-glycoprotein (P-gp) highly expressed in cancer cells can lead to multidrug resistance (MDR) and the combination of anti-cancer drugs with P-gp inhibitor has been a promising strategy to reverse MDR in cancer treatment. In this study, we established a label-free and detergent-free system combining surface plasmon resonance (SPR) biosensor with styrene maleic acid (SMA) polymer membrane proteins (MPs) stabilization technology to screen potential P-gp inhibitors. First, P-gp was extracted from MCF-7/ADR cells using SMA polymer to form SMA liposomes (SMALPs). Following that, SMALPs were immobilized on an SPR biosensor chip to establish a P-gp inhibitor screening system, and the affinity between P-gp and small molecule ligand was determined. The methodological investigation proved that the screening system had good specificity and stability. Nine P-gp ligands were screened out from 50 natural products, and their affinity constants with P-gp were also determined. The in vitro cell verification experiments demonstrated that tetrandrine, fangchinoline, praeruptorin B, neobaicalein, and icariin could significantly increase the sensitivity of MCF-7/ADR cells to Adriamycin (Adr). Moreover, tetrandrine, praeruptorin B, and neobaicalein could reverse MDR in MCF-7/ADR cells by inhibiting the function of P-gp. This is the first time that SMALPs-based stabilization strategy was applied to SPR analysis system. SMA polymer can retain P-gp in the environment of natural lipid bilayer and thus maintain the correct conformation and physiological functions of P-gp. The developed system can quickly and accurately screen small molecule ligands of complex MPs and obtain affinity between complex MPs and small molecule ligands without protein purification.