Objective To study the expression patterns of neuropeptide Y(NPY)and vasoactive intestine peptide(VIP)during the bone development,and its possible relationship with angioge nesis and osteoblast differ-entiation.Methods The bones of low extremity of SD embry o and new -born rats were taken,fixed in formalin and packed by paraffin wax.The developmental stages of bone were determi ned by HE stain The representative specimen were picked out and within t he same layer the sections were taken immunohistochemical stain respective to anti-NPY,VIP,vasoepithelial grow th factor(VEGF)and alkaline phosphatatase(AP).The location and intensity of stain were compared by microscopi c observation.Results During the earliest stage of osteoge nesis,there was no sign of angiogenesis while osteob last began to differentiate and it parallels the intensity of ossificati on activity.At the first ossification center,the l ocation and pattern of NPY expressio n are similar to those of VEGF.Conclusions Due to VIP expression at the earliest stage of osteogenesis,the bone tissue may have the independent nerve control before angiogenesis.The expression similarity of timing and lo cation between NPY and VEGF suggests there is certain relationship between NPY-energetic nerve and angiogenesis.

Objective:To investigate the present conditions and prospects of chitin and its derivatives use for tissue engineering. Methods:The literatures about the use in tissue engineering of chitin and its derivatives were widely reviewed, at one time, analysed the present conditions of them. ResultSrThere are two aspects about the major use of chitin and its derivatives for tissue engineering, one is act as a sustained release agent, the other is act as a biology scaffold material, and it had made an importan role in reconstruction of many kinds of tissues. Conclusion:Chitin and its derivatives were a kind of nature high polymer material which have distinctive biologic activity. It will be a wide prospect in study of tissue engineering. The focal point of chitin and its derivatives will focus on the compound materials.

In recent years, translational medicine, which is characterized by advanced concepts and methods, developes rapidly and playes a strategic role in the development of TCM acupuncture and moxibustion. Therefore, it is worth studying by acupuncturists. Through the background, development, features and research model of translational medicine, the present situation and problems of TCM acupuncture research are analyzed. Several cases of translational Chinese medicine and acupuncture are listed with the consideration of the concept of translational medicine. Studies and thoughts on translational acupuncture are expounded as well. Thus, it is suggested that combined with characteristics of acupuncture, the concept of translational medicine should be utilized to instruct the clinical treatment and research of acupuncture, foster researchers of translational medicine as well as establish the related research teams.
Acupuncture Therapy ; trends ; Humans ; Moxibustion ; trends ; Translational Medical Research ; trends

Objective To evaluate the clinical application of transrecral ultrasound in the treatment of prostate cancer.Methods 23 cases of prostate cancer treated with PSA,CT,MRI and postoperative pathological confirmation were analysed respectively and the results of transrectal ultrasound were compared.Results The diag- nostic match rate of transrectal ultrasound for prostate cancer was 77%.Transrectal ultrasound showed hypoecho nodes in prostate.Conclusion Transrecral ultrasound could detect prostate cancer.

BACKGROUND: Recently, there are some researches show that the nutrition and control of nervous system play an important role in the growth of bone and healing of bone fracture.OBJECTIVE: To probe into the effects of brain-derived neurothophic factor on bone fracture healing and its biomechanic features.DESIGN: Randomized controlled study of experiment animals.SETTING: Traumatic orthopaedic and hematology department of a military medical university.MATERIALS: There were 16 SD rats with transverse fracture of shin,which were set up as intramedullary nail internal fixation. They were randomly divided into experiment group and control group with each of 8 mice.INTERVENTIONS: Rats in the experiment group were taken subcutaneous injection of brain derived neurotrophic factor(BDNF) every other day while control group was injected of saline. The shin of mice was collected to observe in the 2nd, 3rd, 4th and 5th weeks.MAIN OUTCOME MEASURES: Gross comparison of fracture healing of each group, biomechanical test and electro microscopic observation.RESULTS: It can be seen by gross observation 2 weeks after operation that the fracture area was linked by connective tissue in both groups and there was obvious movement. In the 3rd week, woven like bone healing could be seen in the experiment group whereas there was obvious fracture end movement in the control group. In the 4th week, bone healing could be seen in both groups, but the bone callus in the experiment group was much smaller with mild angled malformation. In the 5th week, the fracture line in the experiment group already disappeared and the molding of bone fracture was good while there was bigger bone callus in fracture end of the control group. The angle formed by sagittal planes of fracture in the 3rd, 4th and 5th week was(25.00 ± 1.82)°, (24.75 ± 2.50)°, (23.25 ± 3.77)° respectively in the experiment group and(32.00 ±2.45)°, (33.00 ±5.72)°, (29.25± 2.22)° respectively in the control group( P ＜ 0. 05) . The anti-fracture stress in each stage of the experiment group was better than that of the control group( P ＜ 0.05).CONCLUSION: Applying BDNF early and incessantly can stimulate all the stages of bone fracture healing.

Objective To evaluate the migrating regulation and ultrastructure of the corneal epithelial stem cells in human fetuses. Methods We examined the corneal cryosections of 14-38 weeks of gestation. Hematoxylin-eosin staining showed the stratified corneal epithelium and the corneal epithelial stem cells were localized by mouse monocolonal antibody against human 64-kilodalton keratin (mAE5), and the ultrastructure of the corneal epithelial stem cells was observed. Results At 14 weeks of gestation, the corneal epithelium was composed of a single basal cells layer and 1-2 superficial squamous cells layers. Some superficial squamous cells were mAE5 positive in the limbus as well as the central and peripheral cornea. At 17-29 weeks of gestation, the limbus epithelium developed from 3 to 5 cells layers and the central region from 2 to 3 cells layers. mAE5 positive cells were found in the suprabasal layers of all 3 regions examined but not in the basal layer. At 33-38 weeks of gestation, the corneal epithelium consisting of 4-6 cells layers was morphologically mature. mAE5 immunoreaction showed the negative cells were confined to limbus basal layer. The ultrastructure of basal layer cells showed they had more heterochromatin in the nucleus, less organells in the cytoplasm and less desmosomes among them. Conclusion The migration of corneal epithelial stem cells in the human fetuses was from the whole layers to basal layer and confined to limbus region finally, and their ultrastructure was immature.

Objective To evaluate the biocompatibility between bone morphogenetic protein(BMP) composition and bone marrow stem cell (BMSc).Methods Microspheres were prepared with chitosan and sodium alginate, and BMP was enwrapped in the microspheres. The biocompatibility of the composition was examined using cell-culturing method. The BMSc was cultured in combination with microspheres. The extending speed of the cells, the proliferation and alkaline phosphatase activity were tested.Results There were no inhibition on cellular proliferation of BMSc when it was cultured in combination with microspheres in vitro, but ALP activity increased significantly.Conclusion BMP microspheres possessed satisfactory biocompatibility, and could increase the osteogenic capability of BMSc in vitro.

Objective To observe the effect of the active ingredient present study curcumol impact on human glioma cell line U251 proliferation and apoptosis,its effect on the detection of apoptosis-related gene expression in glioma,and explore the possible mechanism of its anti-glioma,Chinese herbal medicine for the treatment of glioma accumulation of experimental data.Methods In cultured human glioma cell line U251 as a model to medium dilution Curcumol different concentrations,observation and detection following:MTT assay at different times,different concentrations curcumol on U251 cell proliferation;microscope Effect of different concentrations of curcumol U251 cell morphology;affected by flow cytometry curcumol different concentrations on apoptosis in U251;RT-PCR method to detect different concentrations curcumol on U251 cell apoptosis-related gene bcl-2 and COX-2 expression levels of influence.Results Curcumol U251 human glioma cell proliferation inhibition effect and showed concentration-dependent and time-dependent manner (P ＜ 0.05).Conclusions Curcumol U251 human glioma cell proliferation clear.Induce apoptosis and inhibit proliferation of glioma should be an important mechanism of inhibition of proliferation effect of curcumol.Curcumol down on U251 cells bcl-2 gene expression levels and COX-2should be its induction of apoptosis,an important mechanism of inhibition of proliferation.

Objective To discuss the effect of von willebrand factor (vWF) antibody on idiopathic thrombotic thrombocytopenic purpura(TTP) .Methods 28 cases of idiopathic thrombotic thrombocytopenic purpura were selected in our hospital from January 2011 to June 2013 ,and 30 healthy persons as control group ,ADAMTS13 and vWF of two groups were detected .Results 3 cases of patients were detected with positive vWF antibody ,vWF antibody negative in the remaining patients .3 patients with positive vWF antibody ADAMTS13 antibodies were negative ,ADAMTS13 levels were lower than the normal value .The levels of ADAMTS13 in vWF antibody positive patients was significantly lower than that of vWF antibody negative patients and the control group ,(P<0 .01) .vWF antibody positive patients plasma vWF antibody A was higher than vWF antibody negative and the control group (P<0 .01) .In idiopathic TTP after PE ADAMTS13 antigen increased significantly ,vWF antibody and A levels decreased significantly (P<0 .05) .Conclusion vWF antibodies in idiopathic thrombotic thrombocytopenic plays an important role in the pathogenesis of purpura ,vWF antibody may affect patients ADAMTS13 ,promote vWF complex formation ,effect of disease .

Focusing on the poor mechanical strength of porous bioceramics bone scaffold, and taking into account of the good mechanical properties of biodegradable magnesium alloy, we proposed a novel method to fabricate magnesium alloy/bioceramics composite bone scaffold with stereolithography double channels. Firstly, a scaffold structure without mutually connected double channels was designed. Then, an optimized bioceramics scaffold was fabricated according to stereolithography and gel-casing. Molten AZ31 magnesium alloy was perfused into the secondary channel of scaffold by low-pressure casting, and magnesium alloy/bioceramics composite bone scaffold was obtained when magnesium alloy was solidified. The compression test showed that the strength of bioceramics scaffold with only one channel and without magnesium alloy was (9.76 ± 0.64) MPa, while the strength of magnesium alloy/bioceramics composite scaffold with double channels was (17.25 ± 0.88) MPa. It can be concluded that the magnesium alloy/bioceramics composite is obviously able to improve the scaffold strength.
Alloys ; Biomechanical Phenomena ; Bone and Bones ; Ceramics ; Humans ; Magnesium ; Materials Testing ; Porosity ; Tissue Scaffolds