BACKGROUND:Bioglass has good biocompatibility and biological activity, which can be combined with calcium phosphate bone cement to form an absorbable bioglass that has the advantages of both materials and is expected to have a better use of space. OBJECTIVE:To explore the mechamism of the new type of absorbable bioglass injection for vertebral body supporting and osteogenic induction in osteoporosis rats. METHODS:Twenty-seven female Sprague-Dawley rats were selected to make osteoporosis models by bilateral ovariectomy, and after 1 month, the rats were randomized into three groups. Bone defect models were established in the lumbar L4 segment of al the rats. Rats in the experimental group were subjected to absorbable bioglass injection; rats in the control group 1 underwent polymethylmethacrylate bone cement injection; and rats in the control group 2 were given injectable calcium phosphate. Twelve weeks after implantation, the compressive strength, degradation and osteogenesis of the implant materials were detected, and levels of serum bone morphogenetic protein-2 and transforming growth factor-β were measured. RESULTSAND CONCLUSION: The compressive strength, hydroxyapatite deposition amount, and weight loss ratio in the experimental group were significantly higher than those in the two control groups (P < 0.05); the relative volume, thickness and number of bone trabeculae in the experimental group were significantly higher than those in the control groups (P < 0.05); the bone morphogenetic protein-2 and transforming growth factor-β protein levels in the experimental group were significantly higher than those in the two control groups (P < 0.05). These findings indicate that the new-type absorbable bioglass can greatly strengthen the vertebral body supporting and promote osteogenic effect in osteoporosis by enhancing the bone morphogenetic protein-2 and transforming growth factor-β protein levels.

Objective To investigate the relationship between acute myocardial ischemia and abnormal motions of left ventricular wall using tissue velocity imaging (TVI) combined with dipyridamole stress echocardiography and evaluate the significance of the new technology in detecting myocardial ischemia. Methods Several grades of constriction on left circumflex coronary artery(LCX) were produced in 13 open-chest canine models. Dipyridamole was added in two steps,first 0.56 mg/kg,then 0.28 mg/kg after four minutes. Views of apical four chambers,two chambers and left ventricular long axis were observed and analyzed. Results In basal condition,the systolic peak velocity(SPV) on different part of wall was various and decreased from cardiac base to apex on each view of long axis. When flow of LCX was decreased 25% and large dosage of dipyridamole was added,the decreasing tendency along the long axis was destructed and SPV of corresponding blood-supply area decreased sharply compared with that of basal condition( P

BACKGROUND:Bony and structural feature often cause pulout strength decrease of pedicle screw, which induces loosening and pulout, and finaly results in fixation failure. Thus, it is very important to elevate the stability of pedicle screw.
OBJECTIVE:To detect the biomechanical stability of bone cement injectable canulated pedicle screw, and to provide reference for bone cement dosage.
METHODS: We selected T11-L4 samples of seven fresh adult corpses, containing 40 vertebral bodies. They were randomly divided into bone cement injectable canulated pedicle screw group and DTPSTM pedicle screw group (n=20). After screw implantation, 1, 2, 3 and 5 mL bone cement was injected. The diffuse distribution of bone cement was observed by imaging. The maximum axial pulout strength was measured.
RESULTS AND CONCLUSION:When the dose of bone cement was 1-3 mL, the average maximum axial pulout strength was significantly greater in the bone cement injectable canulated pedicle screw group than in the DTPSTM pedicle screw group (P < 0.05). When the bone cement dosage was 5 mL, no significant difference in the maximum axial pulout strength was detected between the two groups (P > 0.05). The regression equation was Y=25.269X+133.681 (R2=0.837) in the bone cement injectable canulated pedicle screw, and Y=32.039X+99.251 (R2=0.936) in the DTPSTM pedicle screw group. When the dosage of bone cement was 1-5 mL, the maximum axial pulout strength was highly positively correlated with bone cement dosage (|R| > 0.8). These results suggested that bone cement augmentation pedicle screw could apparently elevate the stability of the screw. The maximum axial pulout strength of the pedicle screw was positively correlated with bone cement dosage. After reaching the satisfactory fixation effects, the bone cement injectable canulated pedicle screw can reduce bone cement dosage, diminish the risk of bone cement leakage, and have more advantages than DTPSTM pedicle screw.

Objective To study the expression of insulin like growth factor binding proteins 3 (IGFBP-3) during inhi-bition of resveratrol (Res) on cell proliferation. Methods The inhibitory effect of Res on BGC-823 cells was determined by MTT method; Real-time qRT-PCR and western blot were applied to detect the expression of IGFBP-3 in Res-treated BGC-823 cells. In addition, cytometry was used to determine the proliferation and apoptosis of Res-treated BGC-823 after knockdown of IG-FBP-3 by siRNA. Results Upon Res (20,40, 80 and 160 μmol · L-1 ) treatment,the viability of BGC-823 cells was (82. 35±10. 65)% ,(74. 30±12. 36)% ,(62. 80±14. 66)% and (50. 75±11. 14)% , respectively. The mRNA and protein ex-pression of IGFBP-3 elevated as high as 2. 96-fold compared to the control group (P<0. 05). The cell viability of BGC-823 cells with IGFBP-3 knockdown was significantly higher than that of the wild type ( P < 0. 05 ) only at high Res concentration (160 μmol·L-1 ). Meanwhile,IGFBP-3 knockdown led to a significant decrease on cell apoptotic rate by Res (160 μmol·L-1 ) [(20. 13±9. 12)% vs (35. 48±11. 12)% ,P<0. 05)]. Conclusion Res can inhibit BGC-823 cell proliferation and promote cell apoptosis, the underlying mechanism of which may be related to the overexpression of IGFBP-3 in BGC-823 cells.

Objective To introduce and evaluate an improved technique of vertical mammaplasty for correction of severe breast ptosis. Methods Vertical mammaplasty that was first reported by Ma-deleine Lejour in Brussels is a technique that uses adjustable markings, an upper pedicle for the areola, and a central breast reduction with lower skin undermining. To shorten vertical scar, it was important to locate new nipple position and move up new inframammary fold. The shape of the breast was crea-ted by suturing the gland and did not rely on the skin. No scar was produced in submammary fold. Re-sults 36 cases were treated with vertical mammaplasty in our department since August 1999. The shape of the new breast was satisfactory in all patients after 3-24 months following-up. Areora necro-sis was not found in all the cases. Conclusion The vertical mammaplasty is an optical technique for correction of severe breast ptosis, Stable results are produced because the gland is strongly sutured.

ABSTRACT:Objective To evaluate the expressions of cell adhesion molecules CD146 and transferrin receptor 1 (TfR1)in ovarian epithelial cancer and investigate their relationship with clinical pathological features of patients with ovarian epithelial cancer (OEC ) so as to further explore the pathogenesis of OEC. Methods Immunohistochemistry was employed to determine the expressions of CD146 and TfR1 in normal,benign and ovarian cancer tissues.Results The immunohistochemical results showed that the positive expressions of CD146 and TfR1 gradually increased with the changes of normal,benign and malignant tissues in OEC.There were significant differences between all the groups (P<0.05).The advanced the clinical stage,the higher the expression rate (P<0 .0 5 ).The lower the histopathological differentiation,the higher the expression rate (P<0 .0 5 ).The expressions of CD146 and TfR1 were not correlated with age or pathological patterns (P>0.05).There was a significant correlation between expressions of CD146 and TfR1 in OEC (P<0.05,rs=0.532).Combined detection sensitivity and specificity were 82.4% and 75.0%.Conclusion The high expressions of CD146 and TfR1 may play a key role in the occurrance,progression and metastasis of OEC.They may be used as potential markers for diagnosis,postoperative follow-up and targeted therapy.

Objective To investigate the protective effect of RLN revealed for RLN in high -risk thyroid surgery,and the clinical value of detecting nerve,thus to provide a reference for clinical treatment.Methods 132 patients of thyroid high -risk surgery were selected,according to whether to explode recurrent laryngeal nerve,they were divided into exposed group (80 cases)and non -exploded group(52 cases).The recurrent laryngeal nerve damage rate,clinical indicators of operation time were compared between the two groups.In the explode group,80 patients according to whether implementation of the nerve monitoring,were divided into the monitored group (36 cases)and non -monitored group(44 cases).The hours to find the nerve,recurrent laryngeal nerve injury rates and other indicators were compared.Results The operative time of the exploded group was (133.66 ±21.48)min,which was significantly longer than the non -exploded group,difference was statistically significant (t =3.994,P =0.025 ).The exposed group had similar incidence of hypocalcemia compared with the other groups,there was no statistically significant difference (P >0.05).The revealing recurrent laryngeal nerve injury rate of the exposed group was 2.50%,which was significantly lower than the non -exploded group,difference was statistically significant (χ2 =5.794,P =0.008).The recurrent laryngeal nerve positioning time of the monitoring group was (4.78 ±0.94)min,which was significantly shorter than the unmonitored group,difference was statistically significant (t =7.168,P =0.001).The recurrent laryngeal nerve injury rate of the monitoring group was 2.78%,showed no significant difference (χ2 =0.911,P =0.338).Conclusion In a high risk thyroid surgery,explode recurrent laryngeal nerve can reduce the rate of recurrent laryngeal nerve damage,nerve monitoring can effectively speed up the nerve localization time,but has no significant effect on reduce the rate of recurrent laryngeal nerve injury.

Objective To evaluate the effect of deep and moderate neuromuscular blockade on surgical conditions during minor laparoscopic gynecologic surgery.Methods Sixty-five patients,with expected surgery time ＜ 3 h,aged 18-60 yr,with body mass index＜30 kg/m2,of American Society of Anesthesiologists physical status Ⅰ orⅡ,scheduled for elective laparoscopic gynecological surgery,were allocated into deep neuromuscular blockade group (group D,n =33) and moderate neuromuscular blockade group (group M,n=32) using a random number table.After induction of anesthesia,the patients were tracheally intubated and mechanically ventilated.Cisatracurium was continuously infused to maintain the degree of neuromuscular blockade in both groups to achieve the target degree post-tetanic count of 1 or 2 in group D and train-of-four (TOF) count of 1 or 2 in group M.Surgical conditions were assessed and scored after surgery.The recovery index,time for TOF ratio returning to 0.7 and 0.9,surgery time,mean intra-abdominal pressure,extubation time and TOF ratio at extubation were recorded.Results Compared with group M,the mean intra-abdominal pressure was significantly decreased,and the extubation time and time for TOF ratio returning to 0.7 and 0.9 were prolonged in group D (P＜0.05).There was no significant difference in the other parameters between the two groups (P＞0.05).Conclusion Moderate neuromuscular blockade can provide better surgical conditions for minor laparoscopic gynecological surgery with shorter recovery time.

Salvia miltorrhiza Bge. is a perennial deciduous flowering plant. Its medicinal root and rhizomes part is widely used in the treatment of various diseases. In this study, bioinformatics analysis was performed to identify 4832 genome SSR loci with length longer than or equal to 40 bp from the draft genome assembly of S. miltorrhiza. The re-sults showed that the dinucleotide repeat motifs and trinucleotide repeat motifs constitute the main types of genome SSR loci, accounting for 37.3% and 61.3% respectively. SSR types enriched with A/T bases showed significantly higher abundance than other types, including AT/TA AAT/ATT, ATA/TAT, TAA/TTA, accounting for 30.5%, 21.6%, 17.1%, 20.4% of the total number of SSR loci, respectively. 1079 primer pairs were designed for these genome SSR loci. These primers can be used for genomic diversity analysis, genetic map construction, genetic marker screening. These data could lay the foundation for population genetics and genomics research of S. miltorrhiza.

Objective To establish an HPLC method for the determination of ginsenosides Rg1 and Re in Shenqi Granula.Methods Chromasil C18 column(250 mm?4.6 mm)was used with acetonitrile-0.05% phosphoric acid solution(21∶79)as mobile phase.The flow rate was 1 mL/min and the detected wavelength was 203 nm.Results Ginsenosides Rg1 and Re could be baseline separated with in 30 min.The average recovery rates were 99.60% and 98.5%,corresponding RSD were 1.93% and 2.31% for ginsenoside Rg1 and Re,respectively(n=5).Conclusion This method is fast and accurate and can be used for quality control of Shenqi Granula.