Objective:To explore the effect of bFGF on the viability of the free skin with subdermal vascular plexus.Methods:Twenty-six patients with the diagnosis of scar deformity and needed scar excision were divided into two groups with 13 patients in each group.150AU/cm 2 of bFGF with the concentration of 2400AU/ml was sprayed on the base of the wounds after excision of scar in bFGF group.The free skin with subdermal vascular plexus were soaked in the bFGF solution with the concentration of 2400AU/ml for 15 minutes.NS were employed as control agents.The viable rate of these free skin with subdermal vascular plexus were investigated.Results:The results indicated significant difference in the viable rates between bFGF group and the control group on the 14 th postoperation day, T=2.39 P

Objective To investigate the application value of low dose high pitch dual source CT angiography technique in diagno-sis of acute aortic dissection.Methods 21 cases of critically ill patients with suspected aortic dissection underwent total aortic angiog-raphy without using ECG by adopting the second generation dual source CT Flash Technology (pitch 3 .2 ,1 0 0 kV and 1 0 0 mAs), using a lower contrast dose (60 mL).Results All subjects accepted as low as possible radiation doses and iodine intake;at the same time,accurate information including aortic intimal tear position,intimal flap,true and false lumen,and lesions involving the range vessel signs and anatomic relationship were received,2 cases of Stanford type A,type B 1 9 cases (2 cases of aortic rupture).Average scan time 2.6 s,average effective radiation dose cm 270 mGy·cm.Conclusion High quality images by using high pitch dual source CT low dose angiography with lower contrast dose provide safe,reliable,real-time screening method for critically ill patients with aor-tic dissection caused by systemic severe compound injury.

Objective To investigate the possibility of auricle reconstruction assisted by an expander using porous silicon auricle frame.Methods An adult male with average sized,normal ears was selected.The spiral CT scan was used to acquire primitive data of his external ear.Mimics 8.1 and Geomagic studio 12 were used for 3D reconstruction and image processing.Three-dimensional model of auricle 1.4 mm in thickness was created according to the anterior auricular surface data.Finally,a metal model was made according to the 3D model of auricle.By the extrusion method,silicon auricle frame was formed from the metal model.Multiple perforations,1 mm in diameter and 1 mm internal from each other,were then made by a puncher.50 ml kidney tissue expanders were implanted between the panniculus carnosus and the fascia through an incision on the backs of 10 New Zealand white rabbits.The expander was inflated with 20 ml saline weekly,to a total of 160 ml.Maintenance of expansion lasted for a month.The expander was then removed through an incision along the expander near the back.Silicon auricle frame was inserted into the pocket.The reconstructed ears were observed for 6 months postoperation.Whether there were deformations,contractures and extrusions were observed.Results The reconstructed ears were elastic and compressible.No deformation,contracture or extrusion were observed 6 months postoperation.Scaphoid fossa,triangular fossa,helix,antihelix were legible.Conclusions The silicon frame,1.4 mm in thickness manufacted by computer aided design,could stand up to contraction of the overlying expanded flap,and it thus is possible to be used for auricle reconstruction assisted by the expander.

Objective To evaluate the effect of one-visit endodontic treatment for infected root canals with combination of nickel-titanium instruments and ultrasonic technique and warm vertical technique.Methods According to treatment,90 teeth were randomly divided into experimental and control groups.Two groups were used nickel titarlium root canal preparation.Experimental group:51 teeth for ultrasonic root canal irrigation,and warm vertical technique was employed to fill the root canal.Control group:39 teeth for rinse syringes,and warm vertical technique was employed to fill the root canal.Washing fluid was 2％ sodium hypochlorite.The root canal filling was observed after a week and one year of postoperative pain response.Results A week later,two groups of post-operative pain showed that there was significant difference in responses (x2 =15.525,P ＜ 0.05).One year later,the two groups showed no significant difference in efficacy(x2 =0.085,P ＞ 0.05).Conclusion The combination of nickel-titanium instruments and ultrasonic irrigation technique and warm vertical obturation,for the treatment of infected root canals was a method to complete the root canal filling,could reduce both the number of patients subsquent visits and the postoperative pain response,while it could improve the quality of root canal filling.

Objective To analyze locations of acantholysis in pemphigus vulgaris (PV) and pemphigus foliaceus (PF),so as to explain why acantholysis in pemphigus occurs in different locations of the epidermis.Methods Clinical data,histopathological and immunopathological findings,and pemphigus antibody level values were collected from 43 patients with PV and 28 with PF,and retrospectively analyzed.Results Of the 43 patients with PV,35 showed acantholysis in the upper basal layer,8 in the middle-to-upper epidermis.Of the 28 patients with PF,25 showed acantholysis in the granular layer and the upper prickle cell layer,3 in the middle-to-lower epidermis.Patients with PF showed significantly higher levels of anti-Desmoglein 1 (Dsg1) antibody compared with patients with PV (P =0.047).However,there were no significant differences in the levels of anti-Dsg1 and anti-Dsg3 antibodies between PV patients who had acantholysis in the middle-to-upper epidermis and those in the upper basal layer.Conclusion Histopathological examinations of PV and PF lesions show that acantholysis can occur in the middle-to-upper epidermis,as well as in the middle-to-lower epidermis,and locations of acantholysis may be associated with levels of anti-Dsg1 and anti-Dsg3 antibodies.

Objective To detect ret mutations in two Chinese families with multiple endocrine neoplasia type 2A(MEN2A).Methods In our study,9 members from these two families including 3 patients were recruited.Polymerase chain reaction(PCR)and direct gene sequencing of PCR products by an automated DNA sequencer were applied to scan the entire 21 exons of ret proto-oncogene in the leukocyte DNA of the subjects.Results Two missense mutations were detected in exon11 of the ret proto-oncogene.One was C634R in the 2 patients from a family and the other was C634Y in 2 subjects from another family(one was the patient).Two heterozygous variants(A45A and L769L)in these 4 subjects were revealed.Conclusion Two mutations(C634R and C634Y)are detected in two families with MEN2A.Direct DNA sequencing analysis can diagnose MEN2A at gene level,which is helpful in making clinical management of the disease and in diagnosing earlier in their offspring.

Objective To observe the therapeutic effect of Jingganquzhi decoction(JQ,净肝祛脂汤) in treating non-alcoholic fatty liver.Methods Eighty patients with non-alcoholic fatty liver were randomly divided into treatment group to receive JQ and control group to receive Dongbaogantai(DG,东宝肝泰) orally for 3 months.The changes of liver function,blood lipids,B ultrasonic examination were observed.Results After the treatment,the liver function criteria: alanine aminotransferase(ALT),aspartate aminotransferase(AST),alkaline phosphatase(ALP),?-glutamyltransferase(?-GGT) and blood lipids of triglycerides(TG),total cholesterol(TC) were lower than those before the treatment,while the high-density lipoprotein cholesterol(HDL-C) was higher than that before the treatment in both groups(all P

Objective To investigate the protevtive effect and mechanism of early using selective digestive decontamination (SDD) on severe acute pancreatitis(SAP) in rats.Methods Sixty rats were randomly assigned into SAP group and SAP+SDD group after SAP model was set up.Rats in the SAP+SDD group underwent SDD immediately after the model was established and last for 3 days. The peripheral and portal vein serum endotoxin, tumor necrosis factor -a (TNF-a) and interleukin -1 (IL-1) at 24 hours, 48 hours, and 72 hours and the mortality, average living time and the degree of pancreatic necrosis were observed and compared in the 2 groups. Results The levels of peripheral and portal vein serum endotoxin, TNF-? , IL-1,and the mortalities in SAP+SDD group were significantly lower than those in SAP group(all P

Objective To evaluate the possibility of AG490 as a potential immunosuppressor and to explore its basic mechanism. Methods Human peripheral blood lymphocytes (both T and B) isolated from healthy donors were cultured with PHA or IL 2 separately for MLC to induce the proliferation of human lymphocytes. The inhibitory rate of human lymphocyte proliferation, the release of cytokines (IL 2, IL 6 and IFN ?) and the changes in differentiation of lymphocyte subsets were observed under different immunosuppressors of AG490, CsA and FK506. Results In vitro experiment, AG490 could suppress the proliferation of lymphocytes induced by various mechanisms (especially the CD3 + and CD4 + cells), obviously inhibit the IL 2 and IFN ? production, but could not inhibit the IL 6 production. Conclusion AG490 is a potential immunosuppressor.

Objective: To establish a quality control method for Gene-Viral Therapy system CNHK200-hEndostatin. Methods: According to "The Guideline on Quality Control Methods of Human Gene Therapy Products", a quality control method for adenovirus was set up, which consisted of adenovirus protein identification, genomic identification, hEndostatin gene identification, hEndostatin protein quantitation, adenovirus particle quantitation, virus titer quantitation, determination of particle to PFU ratio, purity detection, AdWT detection, host cell DNA residue detectiong bovine serum protein residue detection, etc. The purified adenovirus product of CNHK200-hEndostatin was subjected to the above process. Results: We set up a SDS-PAGE method to identify the adenovirus protein and identified adenovirus genomic DNA by restriction endonuclease enzyme analysis. Human endostatin gene was identified by PCR method and its expression product was quantitated by ELISA. The number of adenovirus particle was quantitated by D260 method and HPLC method. The purity of adenovirus was determined by D260/D280 method and HPLC method. A PCR reaction was introduced to detect AdWT and hybridization method was used in host cell DNA residue detection. Bovine serum protein residue was detected by reverse indirect hemagglutination assay. All these methods were confirmed feasible in adenovirus quality control and our purified adenovirus sample was eligible in all test items. Conclusion: A series of basic methods have been successfully established for quality control of gene-viral therapy system CNHK200-hEndostatin. Our modified method for adenovirus particle quantitation by HPLC is more rapid and accurate than traditional method. The established methods have been approved in testing the purified adenovirus samples.