BACKGROUND: Hydroxyapatite-geltin composite has good biocompatibility and osteoinductivity, and can used be as tissue engineering scaffold to repair bone defects. OBJECTIVE: To observe the effect of three-dimensional (3D) printed hydroxyapatite/gelatin scaffold combined with bone marrow mesenchymal stem cells and umbilical vein endothelial cells in repairing rabbit skull defects. METHODS: Nine male New Zealand white rabbits were taken to establish a skull defect model with a diameter of approximately 0.8 cm, and randomly divided into three groups: blank group: no any treatment; control group: only 3D printed hydroxyapatite-geltin scaffold; experimental group: 3D printed hydroxyapatitegeltin scaffold and bone marrow mesenchymal stem cells and bone marrow mesenchymal stem cells complex group, with three rabbits in each group. At 8 weeks after the operation, CT scan of the skull pyramid beam and histological observation of the skull defect were performed on the white rabbits of each group. Animal experiments were approved by the Ethics Committee of Jining Medical College. RESULTS AND CONCLUSION: (1) CT scan of pyramidal tract: Blank group showed obvious bone defects, and the defect area was slightly radiopaque with the edges of the surrounding normal bone tissue. Control group showed some new bone formation, which was discontinuous and inconsistent with the surrounding bone tissue. Experimental group showed that the new bone tissue was linear and continuous; the thickness was thin; and the defect area merged with the adjacent bone tissue edge. (2) Histological observation: Hematoxylin-eosin staining and Masson trichrome staining showed that fibrous connective tissue formation and a small amount of free bone cells were seen in the defect area of the blank group. A small amount of bone formation was seen in the control group. Bone matrix was deposited at the edge of the material, replacing the material to form small bone trabeculae. The material space of the experimental group was gradually replaced by new bone, and the defect area was filled with new bone and trabecular bone structure-like tissue. (3) The results show that the 3D bionic printing hydroxyapatite-geltin scaffold combined with bone marrow mesenchymal stem cells and bone marrow mesenchymal stem cells can effectively promote the growth of bone tissue and accelerate the repair of bone defects.

China ; Congresses as Topic ; Fatty Liver ; Humans

OBJECTIVETo observe the changes of behavior and amino acids in brain tissue of rats with adjuvant arthritis, and effects of Xinfeng Capsule (XFC) on them.

METHODSAA model was induced by complete Freund's adjuvant in rats. Five groups including the normal control group, the model group, the XFC group, the methotrexate (MTX) group and the Tripterygium wilfordii polysaccharide (TPT) group were set up. The changes of behavior, amino acids in brain tissue, swelling degree of joints, and arthritis index (AI) were observed and the correlation analysis on these indexes was performed.

RESULTSCompared with those in the normal control, the frequency of independent activity obviously decreased in the model rats, accompanied with increased number of step-down errors, shortened step down latency (SDL) and prolonged escape latency (EL), also the level of gamma-aminobutyric acid (GABA) in brain tissue elevated and glutamic acid (GLU)/GABA reduced (P <0.05). Compared with those in the model group, all the above indexes were improved significantly in the XFC group after treatment (P <0.05), while they changed insignificantly in the MTX and TPT groups (P> 0.05), the degree of joint swelling and AI were obviously lower in the 3 treated groups (P< 0.05). Correlation analysis showed the frequency of independent activity and SDL were negatively correlated to the swelling degree of joint, and levels of AI, glycine (GLY) and GABA respectively, but positively correlated with GLU/GABA (P<0.05); while EL and number of step-down errors were positively correlated to AI, GLY and GABA respectively, but negatively correlated to GLU/GABA (P < 0.05).

CONCLUSIONImmune stress could lead to the changes of rat behavior and amino acids in brain tissue. XFC treatment could improve the behavior of AA rats through regulating the levels of amino acids in brain tissue.

Amino Acids ; metabolism ; Animals ; Arthritis, Experimental ; physiopathology ; Behavior, Animal ; drug effects ; physiology ; Brain ; drug effects ; metabolism ; Capsules ; Drugs, Chinese Herbal ; pharmacology ; Male ; Random Allocation ; Rats ; Rats, Wistar ; Treatment Outcome

Objective To discuss the value and experience of the percutaneous vertebroplasty (PVP)in the treatment of vertebral body compression fracture(VCF)in aged osteoperosis.Methods PVP was performed in 44 cases with VCF including 28 with single vertebral compressed fracture,12 with double compressed fracture and four with triple compressed fracture,with 67 vertebrae,for clinical and radiologieal evaluation.Results The mean follow-up was 15 months(4-23 months).There could be seen immediate relief of pain in 40 cases,out-of-bed activities at operation day in 19 and out-of-bed activ- ities at second day after operation in 25.Postoperative X-ray showed uniformly distributed bone cement in the vertebral,without leakage.Conclusion PVP is a recommendable method for VCF,for it has ad- vantages of pain relief,vertebrae stabilization,minimal invasion and minor complications.

OBJECTIVETo isolate and identify the pathogen of Dengue fever from Shenzhen city in 2005 - 2006, and to analyze the molecular characteristics of the isolated Dengue virus strain as well as to explore its possible origin.

METHODSIgM and IgG of serum samples taken from 60 suspected Dengue fever patients were detected by ELISA and immunochromatography, and 9 specimens were positive. Nine samples from patients with early stage Dengue fever were used to isolate virus with C6/36 cell line and the positive cell cultures were identified by MGB fluorescent PCR. The type of isolated virus strain was determined by RT-semi-nested-PCR and fluorescent PCR. E gene of isolated virus strain was amplified by RT-PCR and sequenced. Homology and phylogenetic tree of E gene of Shenzhen Dengue virus with the strains isolated from other areas were constructed.

RESULTSOf nine antibody-positive serum samples, one strain of Dengue virus was successfully isolated. The isolated virus strain was confirmed as Dengue virus type 2 and designated as DEN2-SZ0521. The homology of nucleotide sequence and the deduced amino acid sequence of E gene of SZ0521 with standard type 2 Dengue virus NGC strain was 94.2% and 98.2%, but the homology with standard Dengue virus 1, 3, 4 in the same fragment were 59.1%, 57.2%, 58.5% and 68.1%, 66.7%, 63.2%, respectively. The phylogenetic tree indicated that SZ0521 had the greatest similarity with the Malay0412a/Tw strain and they lied in the same branch of the phylogenetic tree. The corresponding homology of nucleotide sequence and amino acid sequence was 99.8% and 100%, respectively. The isolated Dengue virus type 2 belonged to genotype IV with Indonesia-76, Somalia-84 and Sri Lanka-90.

CONCLUSIONDengue virus was isolated from Shenzhen for the first time, and it was classified as type 2. It was confirmed that the type 2 Dengue virus may come from the epidemic area in Malaysia.

Aedes ; virology ; Animals ; China ; Dengue ; virology ; Dengue Virus ; classification ; genetics ; isolation & purification ; Genes, Viral ; Humans ; Phylogeny ; Sequence Analysis, Protein ; Sequence Analysis, RNA

OBJECTIVETo study the chemical constituents of an active fraction (DSS-A-N-30) from Danggui Shaoyao San.

METHODDSS-A-N30 was prepared by macroporous resin chromatography, the compound was isolated by column chromatography on silica gel and RPC-18, the structure was elucidated by spectroscopic methods.

RESULTA new monoterpene glycoside was isolated and identified from DSS-A-N-30.

CONCLUSIONThe new monoterpene glycoside was identified as 4"-hydroxyl-albiflorin.

Bridged-Ring Compounds ; analysis ; isolation & purification ; Chromatography, Gel ; Drugs, Chinese Herbal ; chemistry ; Magnetic Resonance Spectroscopy ; Monoterpenes ; analysis ; isolation & purification

Objective To study the routine examination of Aconitum sinomontanum Nakai and determine the contents of lappacontine and ranaconitine; To provide basis for establishing the quality standard of Aconitum sinomontanum Nakai.Methods Aconitum sinomontanum Nakai were collected from different areas.A method of TLC was used for qualitative discrimination. The methods in the Chinese Pharmacopoeia were adopted for the determination of moisture content, ash content and extractives. Determination of lappacontine and ranaconitine were performed by HPLC. Results The TLC showed that the spots were clear and the separation was good. Individual provisional standards:the moisture,total ash and acid-insoluble ash content of Aconitum sinomontanum Nakai were not more than 11.0%, 12.0%, and 7.0%, respectively; water soluble and alcohol soluble extractives were not less than 18.2% and 10.6%,respectively.The content of ranaconitine and lappacontine in Aconitum sinomontanum Nakai were not less than 0.125% and 0.815%, respectively. Conclusion The method established by the study is accurate and reliable,and can be used for quality evaluation of Aconitum sinomontanum Nakai.

Objective To provide technical support for market supervision of TCM decoction pieces in Beijing, Tianjin and Hebei districts; To facilitate the medical treatment of people in the three districts. Methods A comparative study and analysis on processing procedures of TCM decoction pieces in Beijing, Tianjin and Hebei districts was conducted. Results There were some differences in TCM decoction pieces in Beijing, Tianjin and Hebei districts. The quality of TCM decoction pieces is easy to be contradictory according to different standards. Conclusion It is badly in need of a unified standard for the preparation of TCM decoction pieces.

OBJECTIVETo evaluate the efficacy and safety of docetaxel (Taxotere) (DTX) and oxaliplatin (OXA) for treatment of recurrent epithelial ovarian cancer.

METHODSThirty-six patients with histologically confirmed recurrent epithelial ovarian cancer received chemotherapy with DTX and OXA. DTX at the dose of 75 mg/m(2) was administered on day 1 by intravenous infusion in 60 min, followed by OXA at 100 mg/m(2) given by a 2 h infusion. The chemotherapy cycles were repeated every 21 days, and the patients received at least 2 cycles.

RESULTSAll the patients were available for response evaluation, among whom 3 (8.3%) showed complete responses and 17 (47.2%) showed partial responses, with an overall response rate of 55.6%. The main adverse effects included hematological toxicities and peripheral neuropathy.

CONCLUSIONCombination of DTX and OXA produces good therapeutic effect with tolerable toxicity profile for treatment of recurrent epithelial ovarian cancer.

Adult ; Aged ; Antineoplastic Combined Chemotherapy Protocols ; therapeutic use ; Cystadenoma, Mucinous ; drug therapy ; Cystadenoma, Serous ; drug therapy ; Female ; Humans ; Middle Aged ; Neoplasm Recurrence, Local ; drug therapy ; Organoplatinum Compounds ; administration & dosage ; Ovarian Neoplasms ; drug therapy ; Taxoids ; administration & dosage

Action Potentials ; Animals ; Electromyography ; Environmental Exposure ; Hypothermia ; Rats ; Rats, Wistar ; Seawater ; Thigh ; physiology ; physiopathology