Objective To investigate and evaluate the efficacy of elastic stable intramedullary nailing (ESIN) and bone plate set (BPS) in the treatment of femoral shaft fractures in children. Methods The study involved 39 children with femoral shaft fractures, of whom 18 children were treated with ESIN (ESIN group) and the other 21 with BPS (BPS group). In ESIN group, the nails were insert-ed through a micro incision in the medial and lateral epicondyle after closed reduction under C - arm ob-servation. In BPS group, the plates were placed on the lateral side of femur by means of open reduction and internal fixation. Results All the patients were followed up for 4-20 months (mean 10 months), which showed fracture healing in all the patients. The mean operation time, incision length, perioperative blood loss, length of hospital stay, time of fracture healing and time of weight bearing were (40.0±17.0) minutes, (2.0±0.6) cm, (30.0±8.0) ml, (7.0±1.5) days, (8.0±1.2) weeks and (6.0 ±1.0) weeks respectively in ESIN group, and (70.0±25.0) minutes, (12.0±1.1) cm, (150.0±30.0) ml, (14.0±5.2) days, (13.0±1.9) weeks and (4.0±1.3) weeks respectively in BPS group, with statistical difference between two groups (P < 0.05). Conclusions Compared with BPS, ESIN has the advantages of less operation wound, less perioperative blood loss and shorter time for fracture healing. ESIN can protect the microenvironment important for the fracture healing, and is one of ideal op-tions for treatment of femoral shaft fracture in children.

OBJECTIVETo explore whether the mesenchymal stem cells (MSCs) of rats can be induced into hepatocytes and the condition of differentiation in vitro.

METHODSMesenchymal stem cells were collected from the femora of SD rats by density gradient centrifugation and identified by flow cytometric analysis and alkaline phosphatase (AKP) staining. MSCs were divided into 4 groups to induce differentiation with the different concentration of hepatocyte growth factor (HGF) in culture medium. The concentration of each group was group A 0 ng/ml, group B 10 ng/ml, group C 20 ng/ml and group D 40 ng/ml, respectively. The morphological changes of MSCs were observed by phase-contrast microscope. On day 1, 3, 7, 14, 21 and 28, mRNA of albumin, AFP and CK18 of MSCs of each group were examined by reverse transcription polymerase chain reaction (RT-PCR), and the expressions of them were also detected with immunohistochemistry technique.

RESULTSMesenchymal stem cells collected from the femora of SD rats expressed antigens of CD29, CD44 and CD90, but not CD34 and CD45. AKP staining was negative for all of MSCs. On day 7, AFP mRNA of MSCs in group C and D could be detected by RT-PCR, and increased on day 14, and then directed on day 21. Albumin and CK18 mRNA of MSCs in group C and D could also be detected from day 14 to day 28 by RT-PCR. On the contrary, mRNA of AFP, CK18 and albumin was not detected in group A and B of culture. Immunocytochemical analysis for CK18, albumin and AFP showed positive staining reaction for AFP on day 7, for CK18 and albumin on day 14 in group C and D, and negative staining reaction both in group A and B of culture.

CONCLUSIONMSCs of adult rats cultured in high concentration of HGF can differentiate into hepatocytes.

Animals ; Cell Differentiation ; drug effects ; Dose-Response Relationship, Drug ; Female ; Hepatocyte Growth Factor ; administration & dosage ; pharmacology ; Hepatocytes ; cytology ; In Vitro Techniques ; Male ; Mesenchymal Stromal Cells ; cytology ; drug effects ; Rats ; Rats, Sprague-Dawley

OBJECTIVETo explore whether rat mesenchymal stem cells (MSCs) can be induced to develop into hepatocytes and the role of the microenvironment of hepatocytes growth in inducing MSCs differentiating into hepatocytes in vitro.

METHODSMesenchymal stem cells were collected from the aspirates from femurs of SD rats by density gradient centrifugation and identified by flow cytometric analysis and alkaline phosphatase (ALP) staining. Rat hepatocytes were isolated by the modified two-step method described by Seglen. Two 6-well culture plates were piled up after the chambers' bottoms of the upper plate was removed. Then the upper and lower chambers were separated by a semi-permeable membrane. MSCs and hepatocytes of rats were plated separately in the upper and lower chambers of the two 6-well culture plates for co-culturing. MSCs cultured alone without co-culturing with hepatocytes served as controls. On days 1, 3, 7, 14, 21 and 28, mRNA of cytokeratin 18 (CK-18), alpha-fetoprotein (AFP) and albumin were detected by reverse transcriptase-polymerase chain reaction (RT-PCR), and immunocytochemistry staining of CK-18 AFP and albumin were also examined.

RESULTSThe shapes of MSCs co-cultured with hepatocytes changed and their sizes and numbers increased in the course of the culturing. When MSCs were co-cultured with hepatocytes for 2 weeks, colonies composed of polygonal cells resembling mature hepatocytes were found. In the controls, shapes of cells also changed and their sizes and numbers increased, but colonies composed of polygonal cells resembling mature hepatocytes were not found. Of the MSCs co-cultured with hepatocytes, on day 7, the mRNA of AFP was detected by RT-PCR, and it increased on day 14, and then decreased on day 21. mRNA of albumin and CK-18 were detected by RT-PCR from day 14 to day 28 in the co-cultured cells, but mRNA of AFP and CK-18 and albumin were not detected in the controls in the course of the culturing. Immunocytochemical analysis for CK-18, albumin, and AFP, showed positive staining reaction for AFP on day 7, for CK-18 and AFP on day 14 in the co-cultured cells but not in the controls.

CONCLUSIONSRat MSCs co-cultured with hepatocytes can differentiate into hepatocytes.

Animals ; Bone Marrow Cells ; cytology ; Cell Differentiation ; Cells, Cultured ; Coculture Techniques ; Hepatocytes ; cytology ; Male ; Mesenchymal Stromal Cells ; cytology ; Rats ; Rats, Sprague-Dawley

Adenoma ; pathology ; Brain Neoplasms ; secondary ; Chromogranin A ; metabolism ; Diagnosis, Differential ; Follow-Up Studies ; Humans ; Magnetic Resonance Imaging ; Male ; Middle Aged ; Neoplasm Recurrence, Local ; Pituitary Neoplasms ; diagnosis ; metabolism ; pathology ; surgery ; Reoperation ; Synaptophysin ; metabolism ; Temporal Lobe ; pathology

BACKGROUND:Deep vein thrombosis and pulmonary embolism are certainly related to seasons.
OBJECTIVE:To analyze whether there is a seasonal pattern for deep venous thrombosis (DVT) after total hip and knee arthroplasty.
METHODS:We retrospected 866 patients (1 114 joints) underwent total hip and knee arthroplasty. There were 506 cases of total hip arthroplasty, including 287 male cases and 219 female cases, and 608 cases of total knee arthroplasty, including 133 male cases and 475 female cases. The average age was (60.98±0.87) years. After arthroplasty, patients were given color Doppler ultrasound in the deep veins of the lower limbs and pelvis to analyze the correlation between occurrence of deep vein thrombosis and seasons.
RESULTS AND CONCLUSION:There was a significant difference in the incidence of deep vein thrombosis in summer and winter (χ2=7.190, P=0.007), in summer and spring (χ2=6.995, P=0.008), as wel as in summer and autumn (χ2=5.663, P=0.017). No statistical differences were tested in spring and autumn, in autumn and winter, and in spring and winter (P>0.05). These findings indicate that there is a seasonal variation of deep venous thrombosis after arthroplasty, and the highest incidence of deep vein thrombosis is in winter.

Objective To explore the practical ways on establishing fine course of oral and maxillofacial surgery effectively. Methods Relying on the advantages of the discipline,great efforts had been made in step-by-step enhancement of the quality of teachers,teaching contents,teaching methods and administration. Results Through the establishing of fine course,we could improve the curriculum system,enhance the force of education team,and improve the quality of education. Conclusion Establishing fine course of oral and maxillofacial surgery depends on the environment of sharing educational resources,adjusting the curriculum system and establishing an excellent educational team.

Objective:To study the different Ku80 mRNA expression in normal lung tissue group, lung cancer group(non small cell lung cancer) without chemotherapy, lung cancer group with multiple chemotherapy(n≥2),to evaluate the relationship of tumor drug resistance with Ku80 mRNA expression in human lung cancer.Methods:The lung tissue gene level of Ku80 mRNA was measured by reverse transcription polymerase chain reaction(RT-PCR) in 25 normal lung tissues, 51 lung cancer tissue,taking ?-actin as inner reference.The data were analyzed by SPSS software.Results:Ku80 mRNA expression in normal lung tissue compared to lung cancer group without chemotherapy, lung cancer group with multiple chemotherapy(n≥2) had statistic significant meaning,respectively P

LB.

In order to find the cardiotonic constituents of lateral roots of Aconitum carmichaelii Debx., the investigation was carried out. Silica gel column chromatography, Sephadex LH-20, medium-pressure MCI and reverse phase ODS column chromatography were used to separate the 90% EtOH extract of the lateral roots of Aconitum carmichaelii Debx. The structures of the isolated compounds have been identified by chemical properties and spectroscopic analyses. Ten compounds were isolated and their structures were elucidated as benzoic acid-5-hydroxy-2-benzoyl-amino methyl ester (1), honokiol (2), pinoresinol (3), salicylic acid (4), p-hydroxy-cinnamic acid (5), songorine (6), karakoline (7), mesaconitine (8), hypaconitine (9) and 14-benzoylhypaconitine (10), separetely. Compound 1 is a new compound and its structure has been established by NMR, HR-ESI-MS, UV, IR and X-Ray. Compound 2-5 are isolated from the lateral roots of Aconitum carmichaelii Debx. for the first time.
Aconitum ; chemistry ; Cardiotonic Agents ; chemistry ; isolation & purification ; Plant Roots ; chemistry

ATP-Binding Cassette, Sub-Family B, Member 1 ; metabolism ; Antineoplastic Combined Chemotherapy Protocols ; pharmacology ; Cell Line, Tumor ; Drug Resistance, Multiple ; Drug Resistance, Neoplasm ; Humans ; Lung Neoplasms ; metabolism ; pathology ; Multidrug Resistance-Associated Proteins ; metabolism ; Proto-Oncogene Proteins c-mdm2 ; metabolism ; Vault Ribonucleoprotein Particles ; metabolism