Objective To investigate the effect of estrogen on regression of vascular calcification in rats induced by vitamin D3 plus nicotine.Methods Ninety-six female SD rats were divided randomly into control group (n=24) and calcification group (n=72).Vascular calcification of 72 rats was induced by vitamin D3 and nicotine (VDN).On the day 1,the VDN group rats were injected with vitamin D3(300 000 U/kg,i.m),and were intragastric administrated with nicotine (25 mg/kg),after 9 hours,another dosage of nicotine was given again.After 4 weeks,the VDN group rats were subdivided randomly into 4 groups:VDN group(n=16),Sham operation group (n=16),ovariotomy group (n=16),estrogen group(after ovariotomy,17β-estrogen was subcutaneously injected,50 μg· kg-1· d-1,n=16).Results After 4 weeks,the VDN group showed obvious vascular calcification,and calcium content of the vessel wall was significantly higher than that of control group (P＜0.01).Extensive calcification was witnessed on the aortic tunica media of the VDN group.After 12 and 8 weeks,the calcium content of the vessel wall in each subdivided groups was significantly lower than that at 4 weeks point(P＜0.01),and the lowest calcinm content was in estrogen group,meanwhile the reduction of previously accumulated arterial calcium precipitate in each group was different.Conclusions It is a reversible process that vascular calcification induced by vitamin D plus nicotine in rats.Estrogen can promote the regression of vascular calcification.

Objective To explore the relationship between ULI43 sequence variability and clini-cal disease. Methods UL143 from samples obtained from suspected congenitally human cytomegalovirus (HCMV) infected symptomatic infants were PCR amplified and sequenced. Results There were not too much sequence variability of UL143 compared with Toledo. But no one was completely identical to Toledo, and all UL143 ORFs were shorter than Toledo for frame-shift. Conclusion HCMV-UL143 existed in moat of low passage isolates and sequences were variable. No obvious linkage was observed between UL143 poly-morphisms and outcome of suspected congenital HCMV infection.

Oral and maxillofacial microsurgery has its own characteristics, including high precision, complicated operation, and long learning curve. It is important for young oral and maxillofacial surgeons to master the basic operation skills through standardized and systematic training.Department of Oral & Maxillofacial-Head & Neck Oncology of Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine gives systemic teaching course for senior resident doctors or young attending surgeons. The teaching teams make an intensive course organization and focus on the practical training. They integrat theoretical teaching, basic skill training, gross anatomy training as well as operation observation into a systematic "four-stage ladder approach" , which make a better teaching effect in promoting the oral and maxillofacial surgeons to master the practical and correct microsurgery technique.

Oral and maxillofacial microsurgery has its own characteristics, including high precision, complicated operation, and long learning curve. It is important for young oral and maxillofacial surgeons to master the basic operation skills through standardized and systematic training.Department of Oral & Maxillofacial-Head & Neck Oncology of Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine gives systemic teaching course for senior resident doctors or young attending surgeons. The teaching teams make an intensive course organization and focus on the practical training. They integrat theoretical teaching, basic skill training, gross anatomy training as well as operation observation into a systematic "four-stage ladder approach" , which make a better teaching effect in promoting the oral and maxillofacial surgeons to master the practical and correct microsurgery technique.

Oral and maxillofacial microsurgery has its own characteristics, including high precision, complicated operation, and long learning curve. It is important for young oral and maxillofacial surgeons to master the basic operation skills through standardized and systematic training.Department of Oral & Maxillofacial-Head & Neck Oncology of Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine gives systemic teaching course for senior resident doctors or young attending surgeons. The teaching teams make an intensive course organization and focus on the practical training. They integrat theoretical teaching, basic skill training, gross anatomy training as well as operation observation into a systematic "four-stage ladder approach" , which make a better teaching effect in promoting the oral and maxillofacial surgeons to master the practical and correct microsurgery technique.

Oral and maxillofacial microsurgery has its own characteristics, including high precision, complicated operation, and long learning curve. It is important for young oral and maxillofacial surgeons to master the basic operation skills through standardized and systematic training.Department of Oral & Maxillofacial-Head & Neck Oncology of Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine gives systemic teaching course for senior resident doctors or young attending surgeons. The teaching teams make an intensive course organization and focus on the practical training. They integrat theoretical teaching, basic skill training, gross anatomy training as well as operation observation into a systematic "four-stage ladder approach" , which make a better teaching effect in promoting the oral and maxillofacial surgeons to master the practical and correct microsurgery technique.

Objective To identify the peptide that have strong ability binding to HCMV-UL149 encoded protein,and to analyze the characteristics of the amino acid sequence of UL149-binding peptides.Methods Expressed UL149 proteins of three genotypes were used to screen the binding peptide in the random peptide display library,then the encoding sequence of binding peptides in the selected clones were sequenced.The amino acid sequences of the binding peptides were analyzed for their homology,and were com pared with those of the known protein in protein banks.Results The homologous amino acid sequence W/A/F/V-D/E-D/E-G-W/F/I/L were found within the binding peptides selected by proteins of all the three UL149 genotypes proteins,and no difference between three groups was found.The alignment with amino acid sequences of the known proteins in protein banks showed that the binding peptides of UL149 putative protein have homologous amino acid sequences with immunoglobulin heavy chain variable region(IgHV),the serine/threonine protein kinases,compliment factor H,zinc finger protein,MHC Ⅰ molecule,eukaryotic translation initiation factor,nuclear factor and so on.Conclusion The UL149 encoding proteins have binding ability to proteins mentioned above,and might interfere with the immunity responds to HCMV infection through multiple mechanisms.

Objective To explore the prevalence of parenteral nutrition-associated liver disease (PNALD) and its risk factors in elderly people after gastrointestinal operation. Methods Seventy-five patients received parenteral nutrition (PN) after gastrointestinal operation were retrospectively analyzed. Age, height, body mass index, suftering diseases, history of diseases, time of therapy, total calorie, nonprotein calorie, the kind and amount of fat emulsion and amino acid, the amount of glucose, non-protein energy to nitrogen ratio, ratio of glucose to lipid, liver function, renal function and blood routine were collected. Results The prevalence of PNALD was 25.3% (19/75). The total calorie, nonprotein calorie, the amount of protein, the amount of glucose and ratio of glucose to lipid were obviously higher in PNALD group than in non-PNALD group [(24.0±6.5) vs. (20.7±5.4)kcal·kg-1·d-1, (20.5±5.5)vs. (17.2±4.8)kcal·kg-1·d-1, (1.0±0.3)vs. (0.9±0.2)g ·kg-1·d-1, (2.9±0.9)vs.(2.3±0.9)g·kg-1·d-1, 1.5±0.7 vs. 1.1±0.5; all P<0.05], while the hemoglobin was lower in PNALD group [(97.4±15.1)vs. (110.1±19.1)g/L, P<0.05]. The kind of fat emulsion and amino acid, gender, history of diseases, suftering diseases, body mass index, serum albumin, leukocyte levels and renal function were comparable between the two groups (χ2=0.114,0.843,0.116,0.531,0.344,1.588,0.006,0.063 and 0.549, all P>0.05). Conclusions The prevalence of PNALD is 25.3% in 75 elderly patients after gastrointestinal operation. Total calorie, the amount of glucose and the ratio of glucose to lipid should be reduced in these patients for preventing PNALD.

Objective To study the iodine nutritional status of population living in Tibetan pastoral areas,in order to provide a scientific basis for prevention and control of iodine deficiency disorders.Methods Drinking water samples were collected to test iodine content in agricultural town(Kajiaman) and pastoral area(Zuogaiduoma town) of Hezuo in Gannan Tibetan autonomous prefecture.Thirty of child-bearing age,pregnant and breastfeeding women were selected,respectively,and 90 male adults aged 20-50 from these families(1 from each family) and 90 children aged 8-10 (30 people in each age group) from local schools were randomly sampled at the same time,and urinary iodine (UI) was measured randomly.Edible salt and main food samples were collected to test iodine content from the 10 families of the three types of women,respectively,and they were asked to recall its family intake of food species in the past 24 h excluding spices.The water iodine was determined using arseniccerium redox method (GB/T 5750.1-2006) ; UI with ammonium persulfate digestion-arsenic cerium catalytic spectrophotometric method (WS/T 107-2006) ; salt iodine used direct determination method(GB/T 13025.7-1999); and food iodine with alkali the gray arsenic cerium contact colorimetry.All these work were done in May,2011.Results The average of water iodine was (1.63 ± 0.14)μg/L in agricultural areas and (2.08 ±1.90)μg/Lin pastoral areas of the 10 water samples tested,respectively.The median urinary iodine(MUI) among women of pregnant,lactating and child-bearing age,male adults and children was 141.99,126.65,253.33,258.07,191.0μg/L,respectively,in agricultural areas and 137.26,97.36,126.16,159.48,285.07 μg/L,respectively,in pastoral areas.The difference of MUI in lactating,male adults and children between pastoral and agricultural areas was statistically significant.The proportion of UI ＜ 50 μg/L was less than 20％,and ＜ 100 μg/L was less than 50％ among all population except lactating woman and pregnant women in pastoral areas.The iodized salt coverage rate was 100％(30/30) in agricultural areas and 90％(27/30) in pastoral areas,and the salt iodine was (32.1 ± 7.8)mg/kg in agricultural areas and (32.3 ± 6.0)mg/kg in pastoral areas,respectively.The food structure in agricultural areas was mainly potato,naked oat fruit,cabbage and so on,the average dietary iodine content was 285.7 μg/kg,and in pastoral areas was mainly chow mein,wheat flour,ghee,yogurt,barley and so on,the average dietary iodine content was 51.1 μg/kg.Conclusions There is no iodine deficiency in general in the population in Tibetan areas with low water iodine.However,iodine nutrition of pregnant women can not be guaranteed.It is recommended that classified guidance measures be taken to ensure the sustainable elimination of iodine deficiency disorders in the Tibetan minority areas.

AIM: To further investagate the mechanism of thrombus formation and develop a new remedy of anti-thrombus formation. METHODS: The amplified DNA fragment of vWF-A1 domain was inserted into expression vector with 6?his taq (pQE-31), the recombinant expression vect or was transformed into E coli (strain M15) and induced by IPTG. The recombinant fragment, comprising residues 449-728 of mature vWF subunit, designate rvWF-A1. It was purified by Ni-NTA agarose column and renatured by Tris buffer containin g GSH and GSSG. FACS and platelet aggregometer were employed to analyse the rvWF -A1 function of binding to platelet glycoprotein Ib and inhibiting ristocetin-in duced platelet aggregation. RESULTS: The rvWF-A1 was expressed successfully in E coli, comin g up to 30% of total bacterial protein. Its purify was over 95% through Ni-NTA a garose. It was identified to have ability to bind to GPIb, its biologic activity to inhibit ristocetin-induced platelet aggregation was observed, and the inhibi tive rate was 84 7%. CONCLUSION: The above results indicated that high-level expressi on of rvWF-A1 was successfully achieved in E coli and rvWF-A1 may be an effectiv e antithromotic agent in preventing thrombus formation.