BACKGROUND: Bone defects forming after resection of bone tumor and tumor-like lesion are often packed with autogeneic bone. But sample amount cannot completely meet the clinical demand and different degrees of complications are often left in the bone graft donor region. All these problems remarkably limit the application of autogeneic bone. Allogenic bone is increasingly widely used in the clinical practice due to its structure and biological characteristics similar to autogeneic bone, rich sources, long-term preservation, easy to use and other advantages. OBJECTIVE: To investigate the biocompatibility and clinical application effects of allogeneic bone in filling and repairing benign bone tumor and tumor-like lesion after resection and curettage.DESIGN: A retrospective analysis. SETTING: Department of Pelvis Surgery, Second Affiliated Hospital of Inner Mongolia Medical College. PARTICIPANTS: Totally 230 patients (156 males and 74 females, with age of 5-56 years) were admitted to Department of Bone Tumor, Second Affiliated Hospital of Inner Mongolia Medical College from December 1999 to December 2005 to undergo curettage and hyperthermia inactivation due to benign bone tumor and tumor-like lesion and to receive the treatment by filling and repairing bone defects with lyophilized small-segment allogeneic bone, and were recruited for this study. Written informed consents of treatment were obtained from all the patients. The protocol was approved by the Hospital's Ethics Committee. METHODS: Allogeneic bone grafts (Shanxi Aorui Biomedical Co.,Ltd /Shanxi Provincial Medical Tissue Banking) were used to fill and repair bone defects. Patients who had benign bone tumor, bone cyst or osteofibrous dysplasia underwent cyst curretage. Allogeneic bones were used to pack empty cavity. Therapeutic effects were assessed according to the scoring criteria of allogeneic bone transplantation from Mankin et al, consisting of satisfactory and unsatisfactory two levels. X-ray plain films of surgery sites were taken at postoperative 3, 6 and 12 months. The patients were followed up for 38 months on average in order to observe the therapeutic effects. MAIN OUTCOME MEASURES: Histocompatibility of allogeneic bone in filling and repairing bone tumor defects. RESULTS: All 230 patients participated in the final analysis. ① Biocompatibility of allogeneic bone: Postoperatively, minority of patients had mild immunological rejections. Such allogeneic bone grafts had a good biocompatibility. They could directly fuse with bone tissue in the implantation location of patients, but not inhibit the normal activity of osteocytes on the allogeneic bone grafts or interfere the natural substitution of autogeneic osteocytes, i.e. there were no or less immunological rejections. Bone union was obtained in all the patients at postoperative 6-18 months (6.5 months on average). Thirty-four patients presented exudation of light yellow liquid from incision. Incisions healed in 30 (14.8%) patients at postoperative 2 weeks and in 4 (1.7%) in later time. Altogether 196 (85.2%) patients obtained satisfactory therapeutic effects, but 34 (14.8%) obtained unsatisfactory therapeutic effects. CONCLUSION: Small-segment allogeneic bones have good histocompatibility and osteogenesis, and they are good bone grafts in the bone transplantation.

ObjectiveTo compare the efficacy of 3 internal fixations, locking proximal femoral plate(LPFP), ASIAN IMHS and InterTAN, for intertrochanteric femoral fractures in elderly patients.MethodsA retrospective study was done to analyse 185 elderly patients who had been treated for intertrochanteric femoral fractures from February 2008 to December 2009 in our hospital and fully followed up.They were treated with LPFP (group A, 95 cases), ASIAN IMHS (group B, 52 cases) and InterTAN (group C, 38 cases) . Statistical analyses were conducted to compare the 3 groups in operative time, blood loss,fluoroscopy exposure, hospital charges, intrraoperative complications and functional outcome(Harris hip score).Results The average follow-up was 14. 5 months(from 6 to 28 months). Compared with group A, groups B and C showed significant advantages in operative time, blood 1oss and functional outcome but significant disadvantages in fluoroscopy exposure and hospital charges ( P ＜ 0. 05 ). Compared with group A,groups B and C had significant fewer implant failures ( P ＜ 0. 05).There were no significant differences in all the indexes between groups B and C( P ＞ 0. 05) .Conclusions The ASIAN IMHS and InterTAN appear to be more reliable than LPFP for the treatment of intertrochanteric femoral fractures in the elderly.There appear to be no significant differences between ASIAN IMHS and InterTAN.

Thirty-three patients with bone tumor(malignant in 10 cases and benign in 23 cases)selected from Department of Bone Tumor,the Second Affiliated Hospital of Mongolian Medical College from October 1999 to August 2006 underwent special prostheric replacement at neoplastic segment.The prosthesis was made of stainless steel, alloy of cobalt-chrome-molybdenum,or titanium alloy,which are provided by Beijing Lidakang Technology Company Limited.All patients provided the conftrmed consent.In the follow-up of 6-70 menths,one patient with giant cell tumor of haunch bone,two patients with malignant synovioma,and one patient with malignant fibrous histiocytoma died due to pulITlonary metastasis.In all those patients who survived,none have local recidivation,transferring,or fracture.Among them,one patient had postoperative infection and rigor at knee joint.Three patients had ache at middle part of thigh(junction between prosthesis and femoral bone)after knee joint replacement.According to the Ennekhag scores after reconstruction of surgical oncology,fineness rate of upper limbs was 80%,and that of lower limbs was 86.4%.Odynolysis rate of shoulder ioint was 90%.Active movement was increased and activity of femoral articulation Was generally normal.Extension and flexion of knee joint ranged from 0 to 100 degree.Rejection occurred in stainless steel prosthesis of knee joint in one patient.Junction between prosthesis and femoral bone Was looge in two cases.All other prostheses had great biocompatibillty to tissues.

Objective To testify the screening function of stachyose on soil bacteria by investigating the bacterial culture in ammonium stachyose medium. Methods The turbidimetry was used to determine the absorbance of microbial suspension at 600 nm per 2 h under the same initial concentration of the microbial suspension and to draw their growth curves. Results Most of soil bacteria utilized stachyose ineffectively, while only a few of them grown well in ammonium stachyose medium. Conclusion Since the major soil bacteria can not take stachyose fully as their energy resources, the species and quantity of rhizobacteria may decrease largely and only a few that utilized stachyose better can develop vigorously. Those rhizobateria with better utilization of stachyose may multiply so rapidly as potential ones in the rhizosphere of Rehmannia glutinosa that the disequilibrium of soil microorganism appears.

[Objective] To observe the effect of Allergic Rhinitis Oral Liquid (AROL) on perennial allergic rhinitis (PAR) and to explore its therapeutic mechanism. AROL, composed of modified Guizhi Tang and Yupingfeng San, has the actions of strengthening spleen and lung, replenishing Qi and consolidating superficies and dispelling pathogens and dredging orifices. [Methods] One hundred and twenty-nine cases of confirmed PAR were randomized into Group A (n=43), Group B (n=43) and Group C (n=43). Group A was treated with AROL, Group B with Biyankang Tablets and Group C with normal saline. Three groups were treated for 4 weeks as one treatment course, and another treatment course was carried out one week after interval. Therapeutic effect were observed after treatment and serum levels of interleukin-4 (IL-4) and specific IgE antibody were detected. [Results] The total effective rate was 93.02% in Group A (P

Objective: To explore the false-negative possibility in genetic test of congenital long QT syndrome (LQTS) by next-generation sequencing (NGS). Methods: A total of 28 genomic DNA samples were collected from 4 laboratories including 2 commercial medical laboratories using HiSeq2000 platform as Lab1,n=6 and Lab2,n=8; 1 commercial research service laboratory using Ion-torrent platform as Lab3,n=8 and 1 academic laboratory using HiSeq2000 platform as Lab 4,n=6. Sequencing coverage in the exons of protein-coding region in 3 main LQTS pathogenic genes as KCNQ1, KCNH2, SCN5A and possible pathogenic variants were quantitatively analyzed. Results: In Lab1, Lab 2 and Lab 4 with HiSeq2000 platform, above 98% protein coding regions in 3 pathogenic genes were covered with>10-fold reads and 90%-95% were covered with>30-fold reads. In 2 commercial medical laboratories, 3.63% and 9.84% protein coding regions of KCNQ1 gene in 14 samples were covered with<10-fold reads and with<30-fold reads; lower than 10-fold covering region was focused in the 1st exon including about 2% known or likely pathogenic variants. In 2 commercial medical laboratories, 2.64% and 15.76% protein coding regions of KCNH2 gene in 14 samples were covered with<10-fold reads and with<30-fold reads; low covering region was located in multiple exons. For the data from Lab 1, as high as 28.56% protein coding regions of KCNH2 gene were covered with<30-fold reads including 113 (19.79%) known or likely pathogenic variants. SCN5A gene had the best coverage of protein coding region, with no<10-fold reads in all 4 Labs and no<30-fold reads in 2 commercial medical laboratories. Conclusion: Currently, NGS has low coverage region in both KCNQ1 and KCNH2 genes, pathogenic variants could be missed and false-negative possibility should be highly alert.

Objective To prepare a thrombus-targeted ultrasonic contrast agent and to investigate its targeted ability to fresh blood clots. Methods We first synthesized FITC-KGDS-Palm compound, and then prepared thrombus-targeted microbubbles using "ultrasound & high speed shearing method".Fluorescence labeling thrombus-specific peptides and KGDS,directed at the activated glycoprotein(GP)Ⅱb/Ⅲa receptor of platelets were attached to the surface of lipid microbubbles. The concentration and size of TUCA were measured by Malvern Zeta Sizer Nano-ZS590 and Coulter counter.Immunofluorescence was applied to confirm the conjugation.The conjunct ratio was assessed by flow cytometer (FCM).Results The KGDS-TUCA was straw yellow turbid liquor,and the concentration was 1.5×10~9/mL,and the average size was 1.5 μm. The targeted microbubbles conjugated with the thrombus-specific peptides showed bright green rings by fluorescence microscope.FCM demonstrated that the wavelength of shell of KGDS-TUCA changed greatly,and the conjunct ratio was 90.04%.In vitro study showed KGDS-TUCA remained stable for 48 h at 4 ℃ and target-attached to blood clots and showed good stability.Conclusion The ultrasound & high speed shearing method to prepare TUCA is easy and in favor of purification.KGDS-TUCA has high specific biological activity.The conjunct ratio and stability of KGDS-TUCA are excellent.

BACKGROUND:Mechano growth factor has the potential to activate muscle satelite cels and promote myogenic cel growth, and has dual roles in maintaining bone mass and repairing bone defects.
OBJECTIVE: To explore the mechanism underlying osteogenic differentiation of rabbit bone marrow mesenchymal stem cels promoted by the mechano growth factor.
METHODS:The best concentration and time of mechano growth factor to promote osteogenic differentiation of rabbit bone marrow mesenchymal stem cels were detected by MTT. The mRNA and protein expressions of alkaline phosphatase and osteocalcin were detected by qPCR and western blot, respectively. The phosphorylation level of AKT and mTOR were detected by western blot assay.
RESULTS AND CONCLUSION:The best concentration and time of mechano growth factor was 45 μg/L and 5 days for promoting the osteogenic differentiation of rabbit bone marrow mesenchymal stem cels. The expressions of alkaline phosphatase and osteocalcin at mRNA and protein levels were highest after 4-hour intervention with 45 μg/L mechano growth factor, and meanwhile, the phosphorylation levels of mTOR and AKT were also highest. These findings indicate that the mechano growth factor can promote the differentiation of rabbit bone marrow mesenchymal stem cels into osteoblastsvia PI3K/AKT pathway, and its best concentration and time are 45 μg/L and 4 hours, respectively.

Objective To research and construct dynamic electrocardiograph (ECG) simulation model/algorithm to simulate different kinds of clinical ECG,where the heart rate can be infinitely variable,and to develop one platform for fast-demo and analysis of theoretical wave based on this algorithm which can be implemented in ECG training and teaching. Methods According to different characteristics decoupled one complete ECG wave to 4 parts,including P-wave,PR-section,QT -wave and TP -section. P -wave and QT -wave database were set up accordingly to find the relationship algorithm between PR-section and heart rate,TP-section and heart rate. With the synthesis work of the algorithm and clinical diagnosis theory,ECG simulation mathematical model /algorithm,dynamic link library.(dll) and software interface were developed by C++. Results Through comparing the ECG simulation results with clinical samples,the veracity and validity of the mathematical model/algorithm was verified. Conclusion The software module based on this model/algorithm is very valuable for ECG training and teaching in clinic,and can be implemented in the development of more advanced ECG relative software and devices.

Objective To evaluate application of Steinmenn pins to assist reduction in the treatment of unstable intertrochanteric fractures with proximal femoral nail antirotation(PFNA).Methods From February 2010 to June 2013,38 unstable intertrochanteric fractures were treated by us.There were 23 men and 15 women,aged from 32 to 69 years.By Evans-Jensen classification,18 cases were type Ⅲ,13 type Ⅳ and 7 type Ⅴ.They were divided into 2 groups (n =19).Group A received reduction on a traction bed assisted by Steinmenn pins plus PFNA fixation while group B received reduction only on a traction bed plus PFNA fixation.The 2 groups were compared in terms of fracture reduction,operation time,intro-operative blood loss,fracture healing time,and Harris scores one year postoperation.Results According to the evaluation system modified by Baumgaetner et al.,the postoperative quality of fracture reduction was fine in 15 cases and fair in 4 in group A while it was fine in 9 cases,fair in 8 and poor in 2 in group B,showing a significant difference between the 2 groups (P ＜ 0.05).The operation time in group A (50.7 ± 11.9 min) was significantly shorter than in group B (63.4 ± 15.1 min),and the hip joint Harris score (89.4 ±4.4) one year after operation for group A was significantly higher than that for group B (79.6 ±6.4) (P ＜ 0.05).There were no significant differences between the 2 groups regarding intraoperative blood loss,fracture heeling time and follow-up time (P ＞ 0.05).No cases of refracture,delayed union,nonunion,or avascular necrosis of the femoral head were reported.Conclusion In the treatment of unstable intertrochanteric fractures,compared with reduction only on a traction bed plus PFNA fixation,application of Steinmenn pins to assist reduction on a traction bed plus PFNA fixation may lead to better curative efficacy due to its limited invasion,simplicity and beneficial assistance in reduction.