Objective To establish a rat model of polycystic ovary syndrome (PCOS),and to study the changes in glucose metabolism by isotope tracer.Methods Female SD rats aged 21 days were divided into control group and PCOS group (made by means of testosterone propionate and high-fat diet).After 8 weeks of molding,glucose tolerance test and rat tail vein perfusion experiment was conducted,by application of the principle of stable isotope tracer technique,rate of glucose appearance was compared in two groups and thus glucose metabolism was measured.Results Compared with control group,PCOS group showed polycystic ovarian changes and significantly elevated serum testosterone levels.After 8 weeks of molding,fasting blood glucose showed no significant difference,while glucose tolerance was impaired and rate of appearance of 6,6-d2-glucose increased significantly in PCOS rats.Conclusions The testosterone propionate combined with high-fat diet could induce PCOS rat model,and the PCOS rats demonstrated a significant increase of glucose rate of appearance despite of normal blood glucose level.Therefore it is suggested that during the early stage of PCOS,change in the glucose metabolism has appeared,and early intervention may be beneficial.

15 oocytes group than in the ≤15 oocytes group. All parients with the acute abdmen caused by ectopic and heterotopic pregnancy had tubal factor causing infertility. The misdiagnostic rate was significantly lower of reproductive-specialty doctors than non-reproductivespecialty doctors. Conclusion Excessive oocytes induced by ovarian hyperstimulation and tubal damage were main risk factors of acute abdomen. To reduce the misdiagnosis, non-reproductive-specialty doctors should know about IVF-ET and patients should be informed about the occurrence of these procedure related complications.

This paper studies the effect of personnality, motivation, environment, and professional skills on doctor's innovative ability,aimed to provide reference for personnel recruitment and assessment in tertiary hospitals and for improvement of doctors innovative ability. This research was based on a questionnaire that was conducted in 599 doctors from three tertiary hospitals in Guangzhou. The results indicate that four factors affect doctors' innovative ability with different degrees. Relevant measures are suggested

Aim: Exploration of ways to train young surgical teachers' teaching ability Method: organizing medical training courses;establishing expert training commission;establishing subject teaching group to give guidance;Improving the estimating quality systems of internet education.Result:To relieve the tension of the shortage of teachers caused by enlarged enrollment and heavy teaching tasks in order to adapt to the current rapid development of medical education Conclusion:Pertinent training will be an effective way to improve the young teachers' teaching consciousness,mental diathesis and ability.

Objective To understand the vibrio vulnificus pollution condition in marine products in Zhuhai region and the drug resistance situation to provide the basis for further study of vibrio vulnificus and clinical medication .Methods 89 samples were col-lected from the marine products wholesale market ,pedlars′market and supermarkets in Zhuhai region and the method published by the US Food and Drug Administration (FDA) was adopted to perform the qualitative detection of vibrio vulnificus .The identifica-tion of bacteria and the drug sensitivity test were performed by using the ATB instrument .Results In 89 samples of marine prod-ucts ,vibrio vulnificus was detected in 39 samples ,the total positive rate was 43 .82% .The detection rate of oyster was as high as 60 .87% (28/46) ,followed by marine fish (39 .13% ,9/23) and marine shrimp (20 .00% ,2/10) .The drug sensitive test showed that vibrio vulnificus had the resistant strains to cephalosporins and aminoglycoside drugs .Conclusion The seafood vibrio vulnificus pollution in Zhuhai region can not be ignored .The monitoring of vibrio vulnificus in the marine products and the drug resistance a-nalysis should be strengthened for effectively preventing the outbreak of vibrio vulnificus .

BACKGROUND: Cervical lymph nodes are draining region of cornea. It is believed that aqueous fluid goes through a minor pathway named uveoscleral drainage, which will allow passage of antigen-presenting cells (APC) directly to the draining lymph nodes and induce allograft rejection after keratoplasty.OBJECTIVE: To explore the inhibitory effects of cervical lymphadenectomy in alkali induced high-risk corneal transplantation.DESIGN: A randomized controlled animal experiment.SETTING: State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University.MATERIALS: The experiment was performed in the State Key Laboratory of Ophthalmology (No. 2006DA105054), Zhongshan Ophthalmic Center, Sun Yat-sen University from May 2005 to February 2007. 144 male animals (1-2 months old) including 104 SD rats and 40 Wistar rats were provided by the animal experimental center of Sun Yat-sen University. Sandwich enzyme-linked immunosorbent assay (ELISA) kits for interleukin-2 (IL-2) and interferon-γ (IFN-γ) were brought from BioSource International company (USA). The animal treatment in the experiment was accorded with the statement in Association for Research in Vision and Ophthalmology (ARVO) for animals.METHODS: With the SD rats as recipients, and Wistar rats as donors, all rats were subjected to corneal allografting. The recipient rats were randomly divided into 4 groups (n=20): group A (control group) which underwent corneal transplantation; group B which was subjected to bilateral cervical lymphadenectomy; group C, corneal transplantation 21 days after the alkali burn injury; group D, cervical lymphadenectomy following group C. The immune rejection of grafts was evaluated by detecting the expression of IFN-γ and IL-2 using ELISA. The time when allograft rejection occurred was recorded and mean survival time (MST) was compared among the groups. The development of corneal inflammation and new vessels was examined by slit lamp microscope and histopathological examination.MAIN OUTCOME MEASURES: ①The development of corneal inflammation after corneal alkaline burns. ②MST of rats in each group following transplant. ③The expression of IL-2 and IFN-γ in grafts of each group. RESULTS: ①Normal rat cornea was transparent without inflammation or neovascularization. There were many inflammatory cells invading to stroma on day 3 after burn. Then, the inflammation of cornea resolved gradually 3 weeks after the burn, but corneal neovascularization reached the peak at that time. Corneal blood vessels regressed completely at the end of 8 weeks after the burn. ②The MST of group A, B, C, and D was (10.40±1.14), (46.30±9.46), (7.00±1.58), and (15.00±3.39) days, respectively. Compared with the group A, the MST of group B was significantly longer (P < 0.05), and the MST of grafts in group D was also significantly longer than group C (P < 0.05). ③The expression of IFN-γ and IL-2 proteins was absent in group B. Compared with group C, the expression of IL-2 and IFN-γ proteins in group D significantly decreased on days 3, 7, 10, and 14 after keratoplasty (P < 0.05). CONCLUSION: Cervical lymphadenectomy therapy can effectively inhibit corneal allograft rejection in normal and high-risk corneal beds after alkali burn injury.

BACKGROUND: Obesity is serious complex disease determined by multiple genetic factors. Body mass index (BMI) is a common phenotype for obesity. Although some candidate genes have been shown to be related with BMI variation, the underlying substantial relationship remains poorly understood.OBJECTIVE: To investigate whether estrogen receptor-α (ER-α) Pvull genetic polymorphism is associated with BMI variation.METHODS: In total 390 premenopausal women from a local population of Nanchang City in Jiangxi Province People's Hospital.Body weight and height were measured. All participants were genotyped at the ER-α Pvull locus using polymerase chain reaction-restriction fragment length polymorphism.RESULTS AND CONCLUSION: The ER-α Pvull genotype frequencies of PP, Pp and pp were 0.133, 0.485 and 0.382,respectively. The distribution of ER-Pvull genotypes was in accordance with Hardy-Weinberg equilibrium (HWE) (P ＞ 0.05).There was no significant correlation between ER-α Pvull genetic polymorphism and BMI variation (P = 0.338). These findings indicate that ER-α Pvull genetic polymorphism does not greatly affect BMI variation of premenopausal women in Nanchang region.

As a novel fluorescent nanomaterial,quantum dots (QDs) have a prospect for wide application. However , the adverse effects of QDs have become a concern among and more researchers. The toxic actions of QDs in vivo are closely associated with the biotransport and bio?transformation of QDs,which can be affected by the exposure pathways,exposure dose,surface modification and the particle size. Among them,the exposure pathways can affect the absorption and distribution of QDs in vivo,the exposure dose can affect the metabolism and excretion,thus influencing the distribution of QDs in vivo ,the surface modification can affect the distribution ,metabolism and excretion of QDs in vivo,the particle size can affect the absorption,distribution and excretion of QDs in vivo,and larger QDs are more likely to remain in the body and difficult to remove. QDs can enter the body through the circulatory system,get accumulated and degraded in the liver,kidney and other organs. The degraded products can be excerted through excrement and urine under the metabolism in the liver,spleen and kidneys. In addition,QDs can interact with biological macromolecules in the body,causing DNA damage,affecting the function and gene expression level of the liver,kidney,nervous system and other organs,and resulting in pathological and functional damage to tissues and organs.

Objective To study the relation between Tiam1 gene(T lymphoma invasion/metastasis 1)and carcinomas of larynx metastasized to lymph node.Method Using reverse transcription polymerase chain (RT-PCR) mRNA overexpression of Tiam1 gene in 30 cases of carcinoma of larynx tissue,12 lymph nodes and 10 cases of normal larynx tissue was studied.Result The frequency of TIAM1 overexpression was 75% (6/8) in primary carcinomas of larynx with metastasis but only 18.7%(4/22) in those without metastasis(P=0.0072).Overexpression of TIAM1 in metastasized lymph nodes was observed in 100% (8/8) of lymph nodes with metastasis but in only 25%(1/4) of the lymph nodes without metastasis of carcinoma(P=0.0182).The frequency of TIAM1 overexpression was 33.3% (10/30) in primary carcinomas of larynx.Conclusion Our data suggest that the overexpression of the TIAM1 gene correlates with lymph node metastasis of carcinomas of larynx.

Objective To investigate the epidemiological characteristic of influenza in children in Guangzhou ,and provide the sci-entific basis for prevention .Methods A total of 20 throat swabs were collected from children with influenza-like illness(ILI) each week from 2014 to 2015 .A total of 2080 samples were obtained .The virus was isolated with MDCK cell line and virus type identi-fication were detected by real-time PCR .The relevant data was collected and analyzed epidemiologically .Results A total of 244 were detected positive in 2080 ILI cases in Guangzhou from 2014 to 2015 .The positive rate was 11 .7% .The positive rate of influ-enza virus reached peak in February and June in 2014 ,and the major type of influenza virus was new type H1N1 in February and H3N2 in June .The positive rate of influenza virus reached peak in March and June in 2015 ,and the major type of influenza virus were B type in March and H3N2 in June .Only one case of new H1N1 was detected in 2015 .The positive rate of influenza virus was 25 .6% in 3 to 6 years old ILI children which took larger part than other groups .Conclusion In Guangzhou ,the influenza virus epi-demic is more active in 2015 .The major type of influenza virus in the epidemic is seasonal type H 3N2 and B .Type A and type B appeared in the epidemic alternatively .The 3-6 year-old children are the high-risk group of influenza infection ,and should be monitored .