BACKGROUND:Swan-like memory connector (SMC) can form a three-dimensional fixation on long bone shaft,ensure the stability of fracture ends,and produce a continuous dynamic compressive stress on the fracture ends.Insulin-like growth factorⅠ (IGF-Ⅰ) regulates bone development and metabolism,cell differentiation,as well as mitosis.During the union process of fracture,IGF-I is effective to promote cellular proliferation,stimulate bone formation and result in chondrogenesis.OBJECTIVE:To quantitatively determine the effect of SMC and conventional dynamic compression plate (DCP) on the concentration of local IGF-Ⅰ in the union duration of rabbit humerus fracture.DESIGN,TIME AND SETTING:A controlled observational animal study was performed in the laboratory,Department of Orthopaedics,Changhai Hospital,the Second Military Medical University of Chinese PLA from January to May in 2007.MATERIALS:SMC was Ni-Ti alloy panel,comprising 50%-53% Ni,was customized by Lanzhou Seemine Shape Memory Alloy Co.,Ltd.The temperature of shape recovery was (33±2) ℃.METHODS:Thirty adult New Zealand rabbits were used in this study and were processed into osteotomy.The experiment sides of rabbit humerus were cut and fixed with SMC at random,serving as SMC group,and the other sides were cut at the same position and fixed with DCP,serving as DCP group.Each five animals were put to death at the time points of 2,3,4,6,8,and 12 weeks after internal fixation.Specimens were obtained from the areas that were 0.5 cm besides the fracture line.MAIN OUTCOME MEASURES:Following internal fixation,the contents of local IGF-Ⅰ in the specimens of different time points (2,3,4,6,8,and 12 weeks) were determined in both SMC group and DCP group.RESULTS:In the SMC-treated group,the contents of IGF-I increased 2 weeks after internal fixation,reached the maximum at 6 weeks,and then decreased at 8-12 weeks.In the DCP-treated group,the contents of IGF-Ⅰincreased 2 weeks after internal fixation,reached the maximum at 8 weeks,and then decreased at 12 weeks.No significant differences were found between the SMC group and the DCP group at 2,8,12 weeks after internal fixation (P ＞ 0.05).Compared with the DCP group,the SMC group had a remarkably higher content of IGF-Ⅰ at the time points of 3,4 and 6 weeks (P ＜ 0.05).The difference was the most statistically significant at 4 weeks.CONCLUSION:Compared with conventional DCP,the SMC could better promote the secretion of IGF-Ⅰin fracture and facilitate the fracture union due to the continuous dynamic compressive stress and three-dimensional fixation.

Genomics ; Medicine, Chinese Traditional

Produced by bone cells and stored in the matrix.bone ceil growth factor can contribute to the regulation of bone growth.Gene regulation has its role in bone development.Many factors of this kind have been founded recently.They play their role during the bone formation and absorption processes in the way of autocrine and paracrine.The genes of core binding factor α_1(Cbfα_1)and estrogen receptor α(Erα)have been the recent years'hot factors that are related to the bone development,Gene polymorphism refers to variation on gene level which often occurs in the non-coding domain or the domain bearing no important regulatory function in gene order.This article reviewed the research status of the relation between Cbfα_1 and Erα gene polymorphism with bone development.

Objective To explore the correlation between axon guidance factor Semaphorin 5A and clinicopathological features and its role in the invasion and metastasis of gastric cancer.Methods The expression of Semaphorin 5A in gastric cancer tissues of 171 patients with different gender,age,histological type and TNM stage was detected with immunohistochemistry assay.The expression of Semaphorin 5A was determined by Western blotting assay in gastric cancer cell lines SGC7901 and MKN-45 with metastatic ability and gastric cancer cell lines SNU-1 and AGS without metastatic ability.With RNA interfere technique(RNAi),Semaphorin 5A siRNA expression vector was constructed and transfected into gastric cancer cell line SGC7901.The stable gastric cancer cell line down-expressing Semaphorin 5A was established.The effect of Semaphorin 5A gene silencing on the adhesion,migration and invasion of gastric cancer cell was examined by cell adhesion test,wound healing test and transwell chamber assays.Results The expression level of Semaphorin 5A was correlated with the differentiation degree of gastric cancer(x2 =6.32,P =0.01),lymphnode metastasis(x2 =7.68,P=0.01)and distant metastasis of gastric cancer(x2 =13.67,P =0.00),not correlated with age(x2 =0.21,P=0.79),gender(x2=1.79,P=0.15)and the depth of gastric cancer invasion(x2=1.34,P=0.55).The expression of Semaphorin 5A in cell lines SGC7901 and MKN-45 was significantly higher than that of cell lines SNU-1 and AGS(P＜0.01).Semaphorin 5A gene silencing significantly suppressed the adhesion,migration and invasion abilities of gastric cancer cells.Conclusion Semaphorin 5A may play a catalytic role in the invasion and metastasis of gastric cancer through increasing the adhesion,migration and invasion abilities of gastric cancer cell.

OBJECTIVE:To promote the safety and effectiveness of clinical medication.METHODS:In drug dispension process,operation procedure was carried out strictly and different dispensing methods were adopted according to the characteristics of drugs.RESULTS & CONCLUSIONS:Dispensing guidelines for common injection,insoluble drug and chemotherapy drugs were summarized and improved to promote quality of intravenous drugs dispension.

Objective: To understand their appearance and microscopic characteristics, as well as their differences by studying the pharmacognosy of Yi medicine Elsholtzia rugulosa and Elsholtzia bodinieri, in order to provide a basis for identification and improvement of quality standards.
Methods: Stereo microscopy and optical microscopy and the macroscopic and microscopic identification methods were adopted to compare identification and digital representation for Elsholtzia rugulosa and Elsholtzia bodinieri from overall character, local characteristics, the microscopic identification characteristics, the transverse section and the powder.
Results:There were significant differences in the the macroscopic and the microscopic identification characteristics of Elsholtzia rugulosa and Elsholtzia bodinieri.
Conclusion: This study summarized the exclusive and practical features in pharmacognosic identification of Elsholtzia rugulosa and Elsholtzia bodinieri, it provides a useful reference for supervision the clinical medication,inspection,and standard drafting.

Objective To determine the difference of macrophage RAW264.7 apoptosis induced by Brucella melitensis virulent strain 16M and attenuated strain M5-90 and elucidate the regulatory role of caspases 3,8 and 9.Methods The best multiplicity of infection (MOI) was determined through kinetic analysis of Brucella melitensis strain 16M and M5-90 induced mouse macrophages apoptosis(bacterium ∶ cell =100 ∶ 1,50 ∶ 1,10 ∶1).The infection model was established using the best MOI =50 ∶ 1.The numbers of in vivo bacteria by colony formation units were calculated after macrophages were infected for different times,including 2,4,8,12,24 and 48 h,and the infected cells were collected.The ratios of apoptosis were detected and the regulation of caspases 3,8 and 9 in apoptosis pathway was elucidated by flow cytometry.Results The numbers of 16M in vivo bacteria were 105.4,104.8,105.8,106.5,108.0 and 109.0,respectively and of M5-90 were 106.1,106.2,106.4,106.3,106.1 and 105.0,respectively.The number of in vivo bacteria of 16M was significantly increased than that of M5-90 after infected for 24 h to 48 h.The ratios of apoptosis induced by 16M after infected for 2,4,8,12,24 and 48 h was (2.67 ± 0.09)％,(13.13 ± 0.30)％,(6.56 ± 0.42)％,(6.49 ± 0.28)％,(16.07 ± 0.86)％ and (24.23 ± 1.67)％,respectively,and by M5-90 was (3.62 ± 0.02)％,(32.01 ± 2.59)％,(17.58 ± 0.44)％,(16.09 ± 0.10)％,(62.53 ± 2.70)％ and (85.53 ± 0.15)％,respectively,and by control group was [(1.90 ± 0.20)％,(1.92 ±0.16)％,(1.99 ± 0.03)％,(2.48 ± 0.11)％,(3.56 ± 0.07)％,(5.26 ± 0.33)％].The differences were statistically between groups in same time.The Brucella melitensis vaccine strain M5-90 was more powerful than virulent strain 16M in respect of inducing macrophage apoptosis after infected for 24 to 48 h.Twenty-four hours after infection,the expression of caspases 3,8 and 9 was (1.47 ± 0.05)％,(1.52 ± 0.02)％ and (2.47 ± 0.12)％,respectively,in control group and the expression was (9.70 ± 0.46)％,(6.08 ± 0.56)％ and (35.08 ± 1.64)％,respectively,after infected for 24 h induced by M5-90.The expression of caspases 3,8 and 9 was significantly higher than that control group (P ＜ 0.01).Twenty-four hours after given caspases 3,8 and 9 inhibitor,apoptosis rate in control group was (66.72 ± 1.28)％,in M5-90 group was (22.58 ± 0.55)％,(53.15 ± 1.85)％ and (29.18 ± 0.23)％,respectively,and compared with control group,apoptosis rate of caspases 3,8 and 9 was significantly lower(P ＜ 0.01).Conclusions Apoptosis of macrophage can be induced by Brucella melitensis virulent vaccine strain 16M and attenuated strain M5-90.M5-90 is stronger than that of strain 16M.Caspases 3,8 and 9 can regulate macrophage apoptosis after M5-90 infection.

Objective: To investigate the changes of peripheral cardiotrophin-1 (CT-1) and brain natriuretic peptide (BNP) concentrations in patients undergoing off-pump coronary artery bypass grafting (OPCABC), and the clinical significance of peripheral CT-1 and BNP in cardiac surgery thereof. Methods:Fifty elective OPCABG patients were included in the study. The concentrations of CT-l and BNP were measured before surgery, and at 6 hours, 72 hours, 1 week and 10 months after the operation respectively. The clinical data of the heart function were also collected in patients . Results:(1 )The peripheral CT-1 levels were significantly higher at 10 months after OPCABC than those before operation. (2 )The concentration of peripheral BNP increased at 6 hours after operation. The peak level was found at 72 hours, and remained higher level until the 1 week after operation. The BNP concentration was returned to the normal level at 10 months after OPCABG. (3 )The baseline levels of CT-1 and BNP were both positively correlated with NYHA rank and the diameter of the left ventricular end-diastolic dimension (LVEED), but negatively correlated with left ventricular ejection fraction (LVEF). However, no correlations were found between CT-1 and BNP and NYHA rank, LVEF or LVEED at 10 months after OPCAB. Conclusion:The perioperative blood BNP levels were increased significantly by OPCABG, while perioperative level of CT-1 increased slowly compared with that of BNP. In cardiac surgery,perioperative concentrations of CT-1 and BNP may reflect the cardiac function in patients before OPCABG. The further studies are warranted to assess the prognosis.

Objective To evaluate the reliability of serum catecholamine concentrations in reflecting the depth of dexmedetomidine-based general anesthesia.Methods Forty patients,aged 30-45 yr,of American Society of Anesthesiologists physical status Ⅰ-Ⅱ,undergoing elective laparoscopic hysterectomy under general anesthesia,were divided into 2 groups (n =20 each) using a random number table:dexmedetomidine-based general anesthesia group (group Ⅰ) and general anesthesia group (group Ⅱ).Dexmedetomidine was intravenously infused as a loading bolus of 1 μg/kg over 10 min before induction of anesthesia,followed by an infusion of 0.5 μg · kg-1 · h-1 until 30 min before the end of operation in group Ⅰ.The equal volume of normal saline was given instead of dexmedetomidine in group Ⅱ.Anesthesia was induced with iv midazolam 0.05 mg/kg,propofol 1 mg/kg,cisatracurium 0.15 mg/kg and sufentanil 0.4 μg/kg.Anesthesia was maintained with iv infusion of remifentanil 0.1-0.3 μg · kg-1 · min 1,1％-2％ sevoflurane inhalation and intermittent iv boluses of cisatracurium.Before administration of dexmedetomidine,at the end of administration of the loading dose,at the end of intubation,at the end of skin incision,after establishment of pneumoperitoneum and at the end of operation (T0-5),venous blood samples were taken from the peripheral vein for determination of concentrations of epinephrine (E) and norepinephrine (NE) in serum (by enzyme-linked immunosorbent assay).Results Compared with group Ⅱ],the serum NE and E concentrations were significantly decreased at T1-4 in group Ⅰ (P＜0.05).Compared with the baseline at T0,the serum NE and E concentrations were significantly decreased at T1 in group Ⅰ,and increased at T2-4 in group Ⅱ (P＜0.05).Conclusion The serum catecholamine concentration produces poor reliability in reflecting the depth of dexmedetomidine-based general anesthesia,and thus it is not a suitable monitoring index.

Objective To study the biological activities of Synechococcus sp.PCC7942 with trans-mutated hCu,Zn-SOD-gene.Methods Synechococcus sp.PCC7942 with trans-mutated hCu,Zn-SOD were administered orally for 20d to mice,then the activities of glutathione peroxidase(GSH-Px),catalase(CAT),superoxide dismutase(SOD) and the content of malondialdehyde(MDA) were determined.Results The activities of GSHPx in serum and the activities of CAT in blood increased obviously;the activity of SOD in serum and liver increased markedly;the content of MDA in serum and liver decreased obviously.Conclusion Synechococcus sp.PCC7942 with trans-mutated hCu,Zn-SOD-gene had obvious antioxidant effect in vivo.