Objective To explore the changes of hepatocyte proliferation in rats during the progression of nonalcoholic fatty liver disease (NAFLD). Methods Rat models of NAFLD were established by giving a fat-rich diet. The rats fed with normal diet were taken as normal control at the same stage during the study. These rats were sacrificed at week 4, 8, and 12 respectively and collected the liver tissues. The cell cycle and the changes of the S-phase cell fraction (SPF), proliferation index (PI) was measured by flow cytometry. The expression of proliferating cell nuclear antigen (PCNA) was detected by immunohistochemistry. Results There was no significant difference between NAFLD group and the control group at week 4, 8. But as compared with the control group, SPF and PI of 12-week group were significantly increased and PCNA labeling index were also higher. Conclusion Hepatic hyperplasia occurred after the nonalcoholic steatohepatitis was established in the rat models of NAFLD. Hepatic hyperplasia probably was the reaction of inflammation and necrosis, but whether it was the early incident of hepatocarcinoma should be paid attention.

To study the characteristic of the metacarpal fracture and the forensic investigation of severity of the injury.52 cases with metacarpal fracture were reviewed.The incidence and the location as well as the patterns of fracture were analyzed.The severity of the fracture were different with different mechanism.

ObjectiveTo establish an effective method for F9 gene mutation detection by using high resolution melting ( HRM ) curve analysis.Methods Peripheral blood samples of 55 hemophilia B (HB) patients were collected from Shanghai Ruijin Hospital during January 2005 to June 2010.Genomic DNA was extracted from the peripheral blood.PCR amplification combined with sequencing was used to identify the F9 gene mutations in 40 patients.HRM assay was established on the 21 DNA samples with known mutations in exonl to exon7 of F9 gene.Mutation scanning of exonl to exon7 by HRM combined with direct sequencing of exon8 was used in the molecular diagnosis of 15 HB patients with unknown F9 gene mutations.ResultsF9 gene mutation was detected in each of the 40 HB patients by direct sequencing.By HRM,the different melting curve patterns were identified in 19 out of 21 cases.The detection rate was about 90％.Through mutation scanning of exonl to exon7 by HRM combined with direct sequencing of exon8,F9 gene mutations were detected in all the 15 HB patients with unknown F9 gene mutations.Thirty-four F9 gene mutations had been identified in the 55 HB patients.ConclusionsA new strategy of HB genetic diagnosis,scanning mutations of exonl to exon7 combined with DNA sequencing of exon8 of F9 gene,is established in this study.The new strategy is efficient and reliable.

Objective To investigate current status and problems of coagulation factor Ⅷ and Ⅸ assay in domestic laboratories so as to provide the reference for implementing the standardization and quality improvement.Methods A questionnaire survey was carried out in 76 laboratories,and quality control materials were distributed to 54 laboratories for activity assay.The questionnaire information was analyzed statistically.Test results of quality control materials were classified into three groups according to the reagents and the ranked grading analysis were used to evaluate the performance.Results This research was investigative study.The amount of sample was less than 30 per month in 72％ (52/72)of laboratories.The frequencies of calibration were different,and 33％ (24/72) of laboratories did not perform calibration in a different assay batch.39％ (28/72)of laboratories did not run internal quality control,and about 21％ (15/ 72) of laboratories just performed the normal level quality control.Individual laboratories showed a high cumulative CV (＞ 30％) of intemal quality control.For normal FⅧ and FⅨ control materials,the CV of results were 11.3％-18.2％ and 11.3％-17.9％ respectively as well as 15.3％-20.3％ and 19.5％-21％ for abnormal.Of the three groups,the proportions of laboratories which the FⅧ test results out with consensus were18％,24％ and 22％ as well as 20％,24％ and 28％ for FⅨ.Conclusions The key requirements for quality control of coagulation factors active assay remain to be addressed and implemented.The repeatability and comparability in some laboratories are not satisfactory to meet the clinical needs.With the purpose of promoting quality improvement,we need to develop guidelines,organize related training and establish a national external quality assessment scheme.

Objective To study two new factor Ⅸ mutations Cys82Ser and Ile288Ser in vitro and research the molecular mechanism of haemophilia B. Methods PcDNA3. 1 ( - ) FⅨwt expression plasmid was prepared. The mutated FⅨcDNA expression plasmids, PcDNA3.1 ( - ) FⅨM1 (Cys82Ser) and PcDNA3. 1 ( - ) F Ⅸ M2 (Ile288Ser) were constructed by megaprimer method respectively. Transient expression experiments were performed using HEK293 cells transfected with the expression vectors containing the wild-type or the mutation recombinant cDNA. PcDNA3. 1 ( - ) was used as a blank control. The expression proteins were detected by ELISA, factor activity assay and flourescence stain. Results The results suggested that the two FⅨ gene mutations did not induce the reduction of the mutant FⅨ mRNA compared with the wild-type FⅨ mRNA. The FⅨ:Ag in culture media and cell lysate of wild type conduct were assigned as 100. 0%. The results of PcDNA3.1 ( - ) FⅨ M1 mutation protein were (27. 1 ± 5. 2)% and (99.4 ±4. 1)% respectively. For PcDNA3. 1( - )FⅨM2, the results were (5.3 ± 1.8)% and (31.7 ±2. 5)% respectively. The FⅨ: C in culture media of wild type conduct was also assigned as 100. 0%. Then the two types of mutant protein were ( 8. 5 ± 3.2 ) % and ＜ 1%, respectively. Immunofluorescence microscopy result suggested that the intensity of perinuclear spot was reduced in cells transfected with PcDNA3.1 ( - ) FⅨM2 while staining for PcDNA3. 1 ( - ) FⅨM1 was predominantely diffuse without perinnclear enhancement. Conclusions These results strongly suggest that the FⅨ Cys82Ser mutation protein is not been correctly folded, by any possibility. The mutation protein has secretion defect. The secretion dysfunction and the protein degradation intracellular are possiblely the molecular pathology of Ile288Ser mutant protein.

Objective To evaluate the effect and tolerance of late-course three dimensional conformal radiotherapy(LC3DCRT) combined with concurrent chemotherapy for stage Ⅲ non-small cell lung cancer(NSCLC).Methods From May 2000 to May 2003,48 such patients were entered into this study.The patient's characteristics were: 38 male and 10 female,with median age of 62 years(range 40 to 74);Karnovsky performance score ≥70;stage ⅢA 16 and ⅢB 32,squamous cell carcinoma 38 and adenocarcinoma 10.The treatment regimen consisted of conventional radiotherapy first(40Gy/20f/4W),followed by 3DCRT(24-30Gy/4-5f/2W) combined with concurrent chemotherapy.Conventional irradiation field encompassed the primary lesion,ipsilateral hilum and mediastinal lymph drainage region.LC3DCRT focused on the primary lesion only,with the 80%-90% isodose curve covering the planning target volume(PTV) and the target dose was prescribed to PTV.Supraclavicular metastatic lymph node was treated by mixed 6MV X-ray and electron beam to a total dose of 65-70Gy.Chemotherapy treatment regimen consisted of isophosfomide(25mg/m~2,d1、8,iv) and cisplatin(30mg/d,d1-3,iv) in the 1st and 5th week.Results Before the end of the second month after treatment,the complete response(CR)and partial response(PR) rate was 16.7% and 75.0%,respectively,with a CR+PR rate of 91.7%.The 1-,2-and 3-year local control and overall survival rates as monitored by the Kaplan-Meier method was 87.5%,50.0%,35.7% and 87.5%,46.7%,28.6%,respectively.All patients completed the planned treatment without interruption.Hematological toxicity and radiation-induced pneumonitis as shown by the WHO staging system were the most common acute toxicities but they were tolerable,with 8.3% of grade 3 leukopenia and 4.2% of grade 3 radiation-induced pneumonitis.The severity of the other acute toxicities such as nausea,fever,hemoglobin decrease,and radiation-induced esophagitis were mainly grade 1 or grade 2.Conclusions Late course three dimensional radiotherapy combined with concurrent chemotherapy shows a promising results with tolerable acute toxicities.Long-term survival and late toxicities need further observation.

Objective To study the effects of bone marrow mesenchymal stem cells(BMSCs) transplantation combined with artesunate(Art) on rat model of liver fibrosis.Methods 20 rats from 120 SD rats were selected randomly as normal control group.10 rats from those were executed and extracted marrow to culture BMSCs.The other 90 rats were injected intraperitoneally with CCl4 to make liver fibrosis rat models.10 rats from the 90 rats were selected randomly to ensure the liver fibrosis model was made successfully after 10 weeks.Then,the rest 80 rats were divided randomly into 4 groups:model group,Art treated group,BMSCs transplantation group and Art + BMSCs transplantation group.Fibrous degeneration of the hepatic tissue was detected by Masson stain.The mRNA expression of α-SMA,TGF-β1 in liver were detected by RT-PCR.The hydroxyproline(Hyp) level in liver was detected by enzyme digestion method.Serum TNF-αand TGF-β1 were detected by ELISA.Serum hepatic fibrosis parameters were detected by chemiluminescence and serum liver functional parameters were detected by biochemistry method.Results Liver functional parameters of Art + BMSCs transplantation group were better than those of the other groups.ALB in Art + BMSCs transplantation group was (29.13 ± 3.48) g/L,which was significantly higher than (26.31 ± 2.42) g/L in Art treated group (24.35 ±3.12)g/L in BMSCs transplantation group and (20.14 ±2.86) g/L in model group.There were significant differences among the 4 groups(q =6.27 ～ 19.01,all P ＜ 0.05).Liver fibrosis parameters of Art + BMSCs transplantation group were better than other groups.Hyp in Art + BMSCs transplantation group was (1.03 ±0.16) μg/L,which was significantly lower than (1.56 ± 0.19) μg/L in Art treated group,(1.45 ± 0.24) μg/L in the BMSCs transplantation group and (3.57 ±0.91) μg/L in the model group.There were significant differences among the 4 groups (q =20.47 ～ 27.70,all P ＜ 0.05).The expression of TGF-β1 mRNA of Art + BMSCs transplantation group was lower than other groups.The index of TGF-β1 mRNA expression in Art + BMSCs transplantation group was (20.16 ± 5.21),which was lower than (58.15 ±9.16) in Art treated group,(46.31 ±6.82) in the BMSCs transplantation group and (97.08 ± 14.23) in the model group.There were significant differences among the 4 groups (q =20.35 ～ 44.93,all P ＜ 0.05).Conclusion There're synergistic effects between Art and BMSCs in the treatment of liver fibrosis.

BACKGROUND:Human periodontal ligament stem cels are a kind of mesenchymal stem cels that have self-renewal and multidifferentiation potential. Previous studies have showed that human periodontal ligament stem cels can differentiate into osteoblast-like cels or adipocyte-like cels under appropriate induction. Yet few studies have focused on the expression level of parathyroid hormone 1 receptor which wil affect the osteogenic potential of Human periodontal ligament stem cels. OBJECTIVE:To examine the expression level of parathyroid hormone 1 receptor between human periodontal ligament stem cels and human periodontal ligament cels and to discuss the role of parathyroid hormone 1 receptor in osteogenic differentiation. METHODS:By using magnetic-bead cel sorting, we separated and identified the human periodontal ligament stem cels and human periodontal ligament cels. We examined and compared the mRNA expression level of parathyroid hormone 1 receptor in human periodontal ligament stem cels and human periodontal ligament cels by Real-Time PCR. Osteoblastic differentiation was examined throughin vitro matrix mineralization by alizarin red staining and alkaline phosphatase assay. RESULTS AND CONCLUSION: Positive immunomagetic sorted cels were positive for STRO-1, CD146, Vimentin, indicating that they were periodontal ligament stem cels. Parathyroid hormone 1 receptor was expressed in human periodontal ligament stem cels and mainly located in cel membrane and cytoplasm which were similar to human periodontal ligament cels and MG63 cels. The expression of parathyroid hormone 1 receptor in human periodontal ligament stem cels was 3.7 times higher than that in human periodontal ligament cels, which was similar to that in MG63 cels. After osteogenic induction, human periodontal ligament stem cels showed a higher expression of parathyroid hormone 1 receptor and osteoblast-related genes as wel as the activity of osteoblast alkaline phosphatase and mineralization compared to human periodontal ligament cels. Our data showed that parathyroid hormone 1 receptor was higher in human periodontal ligament stem cels than human periodontal ligament cels and the expression was related with osteogenic differentiation, suggesting that human periodontal ligament stem cels display a higher potency of osteogenic differentiation and act as seed cels with a vast application prospect in oral tissue engineering.

Objective To test synchronization of cardiac mechanical contraction by means of advanced echocardiography and investigate the correlation of left ventricular ejection fraction (LVEF) and the indexes of mechanical dyssynchrony, and the relationship between DTI, STI and RT-3DE.Methods Control group (20 cases), chronic heart failure with a widened QRS complex (12 cases) and chronic heart failure with a shortened QRS duration (10 cases) were selected. We evaluated mechanical dyssynchrony with the DTI, the STI and the RT-3DE, and analyzed the correlation between the improvement degree of cardiac function and indexes of mechanical dyssynchrony, and the correlation between DTI, STI and RT-3DE. Results (1) In CHF groups (including shortened QRS group and widened QRS group), the indexes of synchronization of cardiac mechanical contraction were higher than control group ( <0.05) . (2) However, the indexes of mechanical dyssynchrony before operation showed no statistically significant difference between the widened QRS group and the shortened QRS group (>0.05) . (3) In CHF groups (including shortened QRS group and widened QRS group), the indexes of mechanical dyssynchrony before operation were higher more than after operation ( <0.05) . (4) In postoperation, the indexes of mechanical dyssynchrony showed no statistically significant difference between the widened QRS group and the shortened QRS group ( >0.05) . (5) There was a significant negative correlation between the LVEF and the indexes of mechanical dyssynchrony (<0.01) . (6) .In the indexes of synchronization of cardiac mechanical contractions, there are significant positive correlations between the DTI, the STI and the RT-3DE ( <0.01) . Conclusion Echocardiography can be used to screen CHF patients,and patients with left ventricular synchronous (including shortened QRS duration) can also be benefited from CRT.

Objective To study the ralationship of arrhythmias and heart electrical parameters changes after transcatheter closure of ventricular septal defect (VSD) .Method 50 patients had been successfully finnished the transcatheter closure of ventricular septal defect,and then we observed ralationship of arrhythmias and heart electrical parameters changes. Results (1) Compared with the situation of VSD occluder preoperative and postoperative, during follow-up there were 20 arrhythmia cases, including bundle branch block 16 cases, including the complete left bundle branch block 2 cases,complete right bundle branch block 4 cases,a transient third-degree trioventricular conduction block 1 case, most return to normal in the follow-up. 2 Intracavitary electrogram showed before and after transcatheter closure:A-V conduction parameters A-H,H-V value of (75.10 ± 14.34) ms vs (80.67±23.03) ms and (47.9±12.61) ms vs (50.07±15.23) ms,the difference was not statistically significant ( >0.05) . Conclusions (1) Some patients with new ECG changes after transcatheter closure of VSD, manifested as an increase in bundle branch block in a week, but most return to normal,the prognosis is good. (2) Intraoperative A-H,H-V extension is not related with with postoperative slow arrhythmia;(3) Arrhythmia is a common complication after VSD transcatheler closure, to strictly selecte indications,and to avoid too large diameter are the effective measures to reduce the arrhythmias after transcatheter closure of ventricular septal defect (VSD) .