Objective To understand the status and administration of Young Scholar Scientific Research Program at China CDC,to analyze the program functioning and raised problems,as well as further discuss administrative strategies internally at institutional level.Methods To review and analyze the archived documents and data materials of Young Scholar Scientific Research Program at China CDC.Results Department of Science and Technology is responsible for the daily management of Young Scholar Scientific Program.The research fields of these projects mainly focused on public health and infectious disease.75 two-year period projects are funded and 55 have been completed so far.Accumulated subsidy amount is up to 6.68 million RMB.146 papers have been published,among which 57 English papers have been published (47 were in SCI journals).And 5 patents were granted.Conclusions The establishment of the Young Scholar Scientific Program has empowered the young fellows for conducting scientific research independently.On the other hand,this program also strengthened technical support for disease prevention and control.It is proposed to go on strengthen the scientific management and further establishing academic communication plat form for young fellows.

Objective This paper aimes to analyze the scientific research development trend,research emphasis and cooperation situation of Chinese Center for Disease Control and Prevention since its establishment,to provide the suggestions for policy making of scientific management and related decisions.Methods Based on GoPubMed,Literature quantitative analysis was used to analyze the publication time and journal distribution,research topics and core authors of the scientific papers from 2002 to 2015.Results A total number of 4 501 research papers had been published in 576 different kinds of periodicals.Research topics were based on population health with special focus on the epidemiological,microbiological and etiological studies of infectious disease.Chronic non-communicable disease and health research were paying more and more attention to.Core author group and the core research team have been formed.Conclusions The capability to conduct scientific research was increased and the international influence was increasing year by year,the ability of infectious disease control was strengthened,and the scientific research team worked together more closely.Thus,the Chinese Center for Disease Control and Prevention should reinforce scientific management,develop advanced disciplines,as well as improve the quality of scientific research in the future.

Objective:To discuss the reconstuctive strategy of the defect of anterior rectus fascia and rectus abdominus muscle in the clinical practice.Methods:Between November 2009 and Janurary 2020, clinical data of 24 female patients that underwent 29 anterior rectus fascia and rectus abdominus muscle reconstructions of defect were reviewed retrospectively. The median age was 42.5 years (range, 35-60 years), including 20 breast reconstructions, 2 pelvic reconstructions, 1 thoracic defect after tumor resection and 1 abdominal defect after tumor resection. According to the location and size of the anterior rectus fascia and rectus abdominus muscle defect, three reconstructive methods were applied: 6 direct clousres were applied if the width of defect was less than half of the anterior rectus fascia, 21 polypropylene mesh onlay reconstructions were applied for which the width of defect was or more than half of the anterior rectus fascia, and 2 direct suture closure were applied for the simple rectus abdominus muscle defect.Results:All the patients healed eventfully without abdominal wound complications, such as infection, hematoma, dehiscence. The patients were followed up for a median period of 30 months (range, 5-126 months). 1 patient died of breast cancer recurrence and matastasis at 36 months postoperatively. No patient developed a mesh infection or required mesh removal secondary to infection or foreign body reaction. There was no abdominal wall hernia, 1 patient developed abdominal bulge without further treatment because of no abdominal wall discomfort.Conclusions:The key of successful operation is different reconstructive methods applied to reconstruct the integrity and stability of abdominal wall, based on the location and size of the anterior rectus fascia and rectus abdominus muscle defect.

Objective To investigate the clinical outcomes of intertrochanteric fracture by the fixation using proximal femoral nail (PFN/PFNA).Methods From Jan.2008 to Dec.2010,56 cases with intertrochanteric fracture,including 18 males and 38 females with an average age of 76 years (range,67 -94 ),were treated by fixation with PFN or PFNA.All patients had closed fractures in the shaft of femur.The average time from injury to operation was 3.2 days (ranging from 2.0 days to 10.0 days).All the patients were followed for 1,2,3,6,12 month after surgery,respectively,and then at least once per year.The clinical outcomes were evaluated according to Harris criteria and radiological examinations.Results The mean operating time of all cases was 55 minutes ( ranging from 40 to 80 minutes),and the mean blood loss during surgery was 80 ml (range,50 - 150 ml).All patients was able to walk with walking aid 3 -7 days after surgery.All the patients with fracture healed after 3.5 - 6.0 months ( mean:4 months ).No complications such as infection,lower limb vein infarction,cut-out or breakage of the implants occurred.Four cases had coxa vara shortening deformation,According to Harris criteria,the clinical results were excellent in 43 cases,good in 9,and moderate in 4,with the rate of patients in excellent and good condition was 92.86％ (52/56).Conclusion PFN/PFNA is an effective and minimally invasive method for intertrochanteric fracture,with minimal invasion,high fixation-strength and optimal biomechanics characteristics.This treatment technique produces a high rate of bone re-union,early functional recovery and less complications.

Objective To explore the effect and injury mechanism of reactive oxygen species (ROS) after spinal cord injury (SCI) through detecting the dynamic changes of malonyldialdehyed (MDA)content in spinal cord and observing neurocyte apoptosis and correlation apoptosis factor expression after SCI. Methods Totally 132 adult SD male rats were randomly divided into three groups: sham group, SCI group, methylprednisolone (MPSS) group. The SCI of SD rats was performed by Allen's weight dropping way to impact on the posteriors of spinal cord T_(10). The contents of MDA were determined by chromatometry, the expression of Caspase-3 and Bcl-2 family in the injured spinal cord was detected by immunohistochemical staining;Apoptotic cells were detected by using fluorometric terminal deoxynucleotidyl transferase mediated dUTP nick end labeling (fluorometric TUNEL) staining. Results The content of MDA in the injured cord increased significantly after SCI;R3eached the peak at 6 hours and 3 days post-injury, then dropped down gradually, then was back to the normal level after 7 days. The number of TUNEL labeling positive cells of SCI group increased at 6 hours post-injury;R3eached the peak at 3 days, then dropped down gradually;Bcl-2, Bax protein began to increase at 6 hours post-injury;R3eached the peak at 5 days after injury, then dropped down gradually. Caspase-3 protein began to increase at 6 hours post-injury;R3eached the peak at 3 days after injury, then dropped down gradually. The content of MDA, the number of TUNEL labeling positive cells, the expression of Caspase-3 and Bax of MPSS group decreased significantly than that of SCI group at the same time;R3espectively, while Bcl-2 protein was up-regulated after administration of MPSS.Conclusion ROS could promote the expression of Caspase-3 and degrade the ratio of Bcl-2/Bax to induce apoptosis of neurocyte, which might play significantly role in the process of secondary SCI. In addition, MPSS exerts neuroprotective effects against ROS toxicity, which might be of importance and might contribute to their clinical efficacy for the treatment of SCI.

OBJECTIVE:To study the metabolites,distribution,metabolic type and the possible activity of harpagide which is the active component from Scrophularia ningpoensis in rats in vivo. METHODS:4 SD rats were divided into blank group (ul-tra-pure water) and administration group (harpagide reference solution),2 in each group,ig,160 mg/kg,twice a day,for 3 d. Urine and feces were collected every 12 h before administration and the first administration;sample blood 8 mL was taken after 0.5,1 h of last administration;heart,liver,spleen,lung,kidney,stomach and small intestine were taken. The blood,urine,fe-ces and other tissue solutions were prepared,HPLC-MS was conducted to detect and identify the harpagide metabolites in rats in vi-vo and presume metabolic pathways,and PharmMapper software was used to predict metabolites activity. RESULTS:12 harpagide metabolites were identified in rats in vivo,the form of prototypes and metabolites were distributed in heart,liver,spleen,lung, kidney,stomach and small intestine. The metabolic type mainly included hydrolysis,dehydration,reduction,methylation,sul-fation,glucuronic acid binding,grade A coumaric acid binding,etc. The 12 compounds may have activities in the treatment of epi-lepsy,amyotrophic lateral sclerosis,diabetes,stroke,etc. CONCLUSIONS:Harpagide may be effective in the form of prototypes and metabolites. The study has provided basis for attributing the origins of metabolite,studying the effective form of S. ningpoensis clarifying its pharmacological mechanism and processing mechanism.

OBJECTIVE:To establish the HPLC characteristic chromatogram of pheretima,and compare the differences of the main ingredient contents of Guangdong pheretima and Shanghai pheretima and the chromatogram differences among pheretima and 3 other animal drugs. METHODS:Pheretima HPLC characteristic chromatogram method was adopted to determine the characteris-tic chromatograms of 16 Guangdong pheretima,8 Shanghai pheretima,3 eupolyphaga,3 hirudo and 3 catharsius. Similarity evalua-tion and t test were used to analyze the differences of chromatogram data of 5 animal drugs. RESULTS:The established HPLC char-acteristic chromatogram method firstly identified 11 common characteristic peaks,including 6 nucleosides,4 nucleobase and 1 ami-no acid;and it could be used for the identification of pheretima from eupolyphaga,hirudo and catharsius;the differences of main ingredient contents in the characteristic chromatogram of Guangdong pheretima and Shanghai pheretima were firstly studied. The contents of xanthine and adenosine in Guangdong pheretima were higher than Shanghai pheretima,while the contents of uridine, guanosine and 2′-deoxy guanosine in Shanghai pheretima were higher than Guangdong pheretima. A new index S,calculated by these 5 constituents,was successfully applied to distinguish the 2 kinds of pheretima. CONCLUSIONS:The characteristic chro-matogram can be used for the identification of pheretima,and can provide reference for the pharmacodynamic differences study of Guangdong pheretima and Shanghai pheretima.

Objective:To evaluate the clinical research papers published in recent years about tuberculosis , to understand the ethical review in biomedical journals in our country .Method:We analyzed clinical papers published in two journals that are famous in the field of tuberculosis since 2010 .Results:There were 33 articles included in our study .The number of informed consent is higher than that of ethical review .The descriptions of informed con-sents were not standardized in 12%articles.9%of articles did not mention the name of the ethics committee .Con-clusion:The attention degree to ethics of some editors and researchers should be improved .Pay more attention to medical ethical education , improve cognitive level of ethical issues , ensure the interests of the participants and im-prove the quality of research .

Objective To research CpG and Al(OH)3 adjuvants enhancing immunogenicity of hepatitis C virus(HCV) recombinant ptotein combined vaccine(TIE).Methods BALB/c mice were immunized with candidate vaccine TFE using CpG,Al(OH)3,Al(OH) 3 + CpG,or freund's adjuvant(FA) as the adjuvant.Five mice were sacrificed after 10 d of the last immunization.Specific antibodies in sera were tested by enzyme-linked immunosorbent assay(ELISA).Splenic cells were isolated and levels of IFN-γ,IL-4 and cytotoxic T lymphocyte(CTL) cytotoxicity assay were messuredin vitro.The remaining mice were subcutaneouly injected with 1 × 106 SP2/0-NS3 cells on the back to investigate the protective effects.The differences of means between groups were compared by LSD-t test.Results The specific CTL activity of TFE + A1(OH) 3 + CpG group was higher than TFE + FA group and TFE + CpG group(P ＜ 0.05).The level of IFN-γsecreting cells in TFE + Al(OH)3 + CpG group was higher than that in TFE + M(OH)3 group or TFE + CpG group(P ＜ 0.05).Conclusion Combining Al(OH) 3 and CpG could enhance specific cellular immunogenicity of candidate HCV vaccine TFE.TFE + M(OH) 3 + CpG could effetively prevent the attack of tumor cell SP2/0-NS3 expressing nonstructural protein NS3 of HCV.