Objective:To investigate the present situation, methods, advantages and problems of bilingual teaching in medical cytobiology for medical undergraduates. Methods: The bilingual teaching project of medical cytobiology was considered comprehensively from various angles, such as the teaching aim, methodology, teacher training, teaching material selection and examination in specialized course. Conclusion: It is a very important strategic project to develop bilingual education in China. The course of bilingual teaching for medical undergraduates should be student-oriented and carried out step by step.

Objective To evaluate the value of real time three-dimensional ultrasound in differentiating benign and malignant breast tumors. Methods One hundred and fifty-three patients with breast tumors were examined with real time three-dimensional ultrasound. The results were compared with post-operative pathological results. Results A sign of malignancy on the coronal plane was observed by three-dimensional ultrasonography,named “sun-like symptom”,because the sign looked like a shining sun:striated hyperechoic or iso-echoic images scattered radially around cancers,together with the distortion of normal tissue.The accuracy of the sign in differentiating benign and malignant breast tumors was 86.93 %( 133/153 ), the sensitivity was 78.38 %( 58/74 ), and the specificity was 94.94 %( 75/79 ). Conclusions Real time three-dimensional ultrasound is a valuable and new technique in differentiating benign and malignant breast tumors.

23 cases were treated with immediate full denture.The second base-remodeling or re-prosthodontic treatment was given 3 months later based on the oral condition.Masticatory efficiency (ME)was measured at each stage.About 30% patients participated in the second base-remodeling procedure with ME of 52.63%.

Objective To measure the expression of activin receptor-like kinases 1(ALK1)in dermal fibroblasts from patients with systemic scleroderma(SSc)and to estimate its role in the production of fibronectin and plasminogen activator inhibitor-1(PAI-1).Methods Dermal fibroblasts were isolated from the lesions of 12 patients with SSc as well as the normal skin of 14 healthy controls,and subjected to a primary culture.The third-passage fibroblasts were used in the next experiment.Western blot and indirect immunofluorescence technique were utilized to quantify the expression of ALK1.A specific siRNA targeting ALK1 was designed,constructed,and transiently transfected into the control dermal fibroblasts,which were then classified into 2 groups to be cultured with or without the presence of transforming growth factor(TGF)-β1 for 72 hours followed by the detection of fibronectin and PAI-1 expression with Western blot.Results As Western blot and direct immunofluorescence technique showed,both control and SSc fibroblasts showed an expression of ALK1 in the cytoplasm and membrane,and the expression intensity of ALK1 in SSc fibroblasts was significantly higher than that in the control fibroblasts(1.97 ± 0.05 vs.1.12 ± 0.03,t =50.96,P ＜ 0.05).The expression of ALK1,fibronectin and PAI-1 was decreased by 90％,58％ and 31％ respectively in specific siRNA-transfected SSc fibroblasts compared with the control siRNA-transfected fibroblasts.TGFβ1 significantly increased the expression of ALK1,fibronectin and PAI-1 in the control siRNA-transfected fibroblasts,but the increase was markedly inhibited by the siRNA-targeting ALK1.Conlusion TGFβ1 can promote the production of fibronectin and PAI-1 via ALK1 in fibroblasts,and ALK1 may be involved in the development of sclerosis in SSc.

Objective To isolate and purify Thy 1 low Lin Sca 1 + bone marrow stem subset cells by magnetic activated cell sorting(MACS). Methods Thy 1 low Lin Sca 1 + cells from mouse bone marrow were collected through three processes by MACS.After Lin + cells were removed,Thy 1 low Lin Sca 1 + bone marrow stem cell subsets were harvasted.The purity of the cells was analysed by FACS and the reclaimation rate was counted. Results The purity and reclaimation rate of Thy 1 low Lin Sca 1 + cells were 72.36% and 82.43% respectively, which equaled to the level of isolation and purification of CD34 + cells by MACS. Conclusions It is effective to isolate and purify Thy 1 low Lin Sca 1 + bone marrow stem cell subsets by MACS, and the purity and reclaimation rate of the cells are high.

Actinobacillus succinogenes A3 was mutagenized by ultra high hydrostatic pressure for improving the production ability of succinic acid.The effects of pressure,rate of pressure changes and growth periods on the lethality rate of the strain were investigated.The strain in stationary phase was mutagenized at 200 MPa with the pressure changes at the rate of 50 MPa/min.As a result,a mutation strain Actinobacillus succinogenes B19 was obtained,and the concentration of succinic acid could reach 32.2 g/L,which was 17.9%higher than that of the original strain,and in the meanwhile the concentration of acetic acid was decreased by 11.5%.After six generation,the mutant also has good stability of descendiblity for succinic acid production.

A rapid LAMP detection method with primers designed on genus-specific region identified in the gyrA gene was established in this assay. All four Campylobacter jejuni from different sources were detected positive and fourteen non Campylobacter bacteria were negative, which shows excellent specificity of the primers. Compared with plate count and PCR method, the LAMP method and the PCR method had equal sensitivity, which were three orders of magnitude higher than plate count. In this assay, we also found out that the treatment of DNase could reduce the dead bacteria DNA effectively. The LAMP detection on chicken indicated relatively good result on detection of Campylobacter jejuni combining with treatment of DNase.

Objective To discuss the value of double-row allograft bone suture anchor in repair of rotator cuff injury. Methods Under assistance of arthroseope, 16 cases of rotator cuff lesions were repaired by using double-row allograft bone suture anchors. There were 10 males and 6 females at average age of 44 years (32-58 years). According to Bigliani classification, there were 6 cases of small ruptures, 8 medial ruptures and 2 large ruptures. After rotator cuff was trimmed and acromial bone was re-shaped under arthroscopy, 2 bone anchors attached to suture lines were implanted in the attachment point of rotate cuff of humerus greater tuberosity side by side. Then, the 4 ends of the 2 suture lines were vertically sutured through tendon of supraspinatus mnscle and tied separately, crossing the 4 ends of 2 knots and penetrated each 2 ends into one bone anchor. Finally, these 2 bone anchors were embedded into 2 predrilled bone holes which were parallel to the former 2 anchors and lower in humerus greater tuberosity. Thus, a web was formed and overlapped on the ruptured rotator cuff. The number of bone anchors was according to the size of rupture. Results All cases were followed up for average 14 months (6-23 months). The mean UCLA score was (21.30±5.6) points preoperatively and (32.4±5.8) points postoperatively. The function of shoulders recovered well, with no pain, recurrence or pulling out of bone anchor. Function was excellent in 10 cases, good in 5 and fair in 1. Conclusions As for repair of rotator cuff injury, double-row bone-anchors under arthroscope can provide a tendon-bone interface better suited for biologic healing of rotator cuff. Bone suture anchor can not leave any foreign object residual and costs less.

Objective To explore the short‐term effect of chronic periodontitis patients after implant treatment .Methods Selected 60 cases of tooth loss in chronic periodontitis patients as research group ,a total of 75 implants were placed ,and 50 cases of periodontal healthy teeth missing patients as control group ,a total of 67 implants were placed .Compared two groups of modification sulcus bleeding index(mBII) ,papilla index score(PIS) ,modification plaque index(mPLI) and probing depth(PD) 6 months after op‐eration ,and detected implant sulcular fluid IL‐2 ,IL‐8 content in two groups before and after operation .Results Research group 75 implants had 2 off on their own ,implant loosening degrees 0 ,implant survival rate was 97 .3% ;the control group had no implant failure ,implant loosening of implant survival rate was 100% ,two groups of implant survival rate was no significant difference(χ2 =2 .737 ,P= 0 .098) .The mSBI ,PIS ,mPLI ,PD in research group and control group had no statistically significant(P > 0 .05) .Re‐search group sulcular fluid IL‐2 ,IL‐8 content was significantly higher than those in control group before and after the operation (P< 0 .05) .Conclusion The short‐term effect of implant treatment in chronic periodontitis patients is satisfactory ,without increas‐ing the risk of peri‐implantitis ,and worth of clinical promotion .

Objective To measure vitamin D levels in newborn cord blood inorder to ascertain appropriate supplementation regimes.Methods A total of 6420 newborn umbilical cordblood 25-hydroxyvitamin D [ 25-( OH ) D ] concentrations were measured by enzyme linked immunosorbent assay, and the correlation between 25-( OH ) D and gestational or birth weight or season was retrospectively analyzed.Results There were 5358(83.5℅)of the 6420,had umbilical cord blood concentrations of 25-(OH)D <50. 0 nmol/L. The 25-(OH)D levels M(Q1,Q3)increased from very preterm births, moderately preterm, later preterm, full-term infants to post-term infants [ 29. 0 ( 22. 5, 38.9),33.4(26.3,41.6),35.1(26.9,43.3),35.7(28.1,45.0),43.3(33.5,52.8)nmol/L, P <0. 001]. The 25-(OH) D levels M(Q1,Q3) increased from very low birth weight infants, low birth weight, normal birth weight infants to macrosomia [29. 0(22. 4,38. 8),34. 6(27. 5,44. 2),35. 1(28. 1, 44. 7),35. 7(28. 0,47. 5), P<0. 001]. The 25- (OH)D levels were positively correlated respectively in gestational ages and body weights ( r =0. 619 , 0. 180 , P <0. 05 ) . Newborn umbilical cord blood concentration of 25- ( OH ) D levels varied with season ( P all <0. 001 ) , the lowest in spring [ 30. 4 (24.1,38.3)]and highest in autumn[39.3(31.6,50.9)].Conclusions Premature and low birth weight infants are especially at high risk of vitamin D deficiency and should receive appropriate vitamin D supplementation. In addition, there should be an ongoing promotion of vitamin D supplements to pregnant women and the awareness of sun exposure to achieve vitamin D sufficiency.