Objective To explore the short-term clinical outcome of percutaneous posterior lumbar interbody fusion using B-twin stand-alone expandable spinal spacer in the degenerative lumbar diseases.Methods From January 2006 to March 2009,41 consecutive patients with lumbar degenerative disc diseases were enrolled and 44 intervertebral spaces were observed in this study.There were 20 males and 21 females,with an average age of 57.51(ranging from 31 to 77 years old).Indications for treatment included degenerative lumbar disc herniation(LDH) with intervertebral instability or Ⅰ? spondylolisthesis(25 cases),LDH with intervertebral space collapse(15 cases) and lumbar discogenic pain(1 case).Fusion segments included 3 cases of L3,L4 and L5,3 cases of L3 and L4,27 cases of L4 and L5,and 8 cases of L5 and S1.After percutaneous discectomy and endplate,curettage were meticulously carried out.A B-twin expandable spinal spacer was introduced into the intervertebral space and then expanded and an allograft cancellous bone of 4 to 5 g was implanted around the B-twin in the intervertebral space.The whole operation was monitored by C-arm fluoroscopy.The clinical outcome was evaluated by JOA scale and X-rays and CT examination before the operation,and 1 week,3 and 12 months after the operation.Results After follow-up of 3 to 38 months(mean 16 months),all the patients were evaluated,and excellent was obtained in 13 cases,good in 21 cases,fair in 5 cases,and poor in 2 cases.The excellent and good rate was 82.93% according to the JOA scale.X-rays and CT showed that the subsidence of the B-twin was found in 3 cases,and 1 case was significantly subsided by more than 20%.Cage shift was seen in 1 case.Conclusion Percutaneou posterior lumbar interbody fusion with B-twin is efficient with minimal surgical trauma,blood loss,better rehabilitation and reliable short-term outcome.Strict indications and pinpoint skills for surgery are the precondition to obtain satisfactory outcome in the treatment of degenerative disc disease.

Objective To characterize the feasibility, key technology, indications and clinical outcome of percutaneous lumbar interbody fusion. Methods Clinical data from 32 cases [16 made, 16 female, age range 31-77 years, average disease duration (5.0±2.0) years ] underwent percutaneous nucleotomy and endplate curettage was retrospectively analyzed. After percutaneous nucleotomy and endplate curettage, one expandable spinal spacer B-twin was introduced into the intervertebral space and some allograft cancellous bone implanted around the B-twin. Indications for treatment included degenerative lumbar disc herniation (LDH) with intervetebral distability or Ⅰ degree spondylolythesis (21 cases), LDH with intervetebral space collapse (10 cases) and lumbar discogenic pain (1 case). The symptoms and function of all patients were evaluated before, 3 months and 12 months after the operation by clinical outcome judgment criterion of surgical treatment for low back pain formulated by JOA, and the rate of clinical improvement and treatment efficacy were calculated. The JOA scales preoperatively, postoperatively and on the final follow-up was compared using ANOVA in SPSS. The changes before and after surgery with the JOA score and the the rate of clinical improvement between 3 months and 12 months after the operation was also compared using χ~2 test. Results The average operation time 1 hour and blood loss < 20 ml, Surgical site: L3-4 4 cases, L4-5 19 cases, I5-S1 6 cases, L3-4 and L4-5 3 cases, B-TWIn were implanted fusion cage 35, in three cases of intervertebral space with two implantso Average in Hospital time was (10.0±2.1) d . Complication included 1 case with displacement and 1 case with secondary instability of next intervertebral space. All the patients were evaluated after a follow-up of 3-36 months (average 13 months) 32 cases of patients with low back pain JOA score: before surgery is(4.1±1.8), 3 months after surgery is (11.9±3.9), 1 year after surgery of the 22 cases is (12.0±3.2). Score before and after surgery were statistically significant differences (F = 5.67, P < 0.01). The rate of clinical improvement After surgery there was no significant difference (F = 4.18, P > 0.05). Conclusions Percutaneous posterior lumbar interbody fusion with B-twin expandable fusion cage could lead to satisfactory outcome in the treatment of degenerative disc disease and intervertebral instability,which minimize surgical soft tissue and trauma spinal damage, does not destroy the structure of spinal stability. The technique The long-term outcome, complications and fusion rate need further observing.

Objective To search for the gene encoding specific antigen of Ancylostoma caninum that induces host′s protective immunity. \ Methods\ A lambda ZAPⅡ cDNA library of A.canium was screened with sera from dogs \{immunized\} subcutaneously with hookworm larvae(L3). After sequencing, insert gene (AcAg) from positive clones was \{ligated\} into PUC18 and PET28C. Recombinant pET28C plasmid was induced to expressed protein in the E.coli BL21. The \{characteristic\} of recombinant protein is analyzed by SDS\|PAGE and Western bloting assay. \ Results \ Five positive \{clones\} were obtained, and proved to be the same. The insert gene (AcAg) in pET28C vector expressed a recombinant \{protein\} of about 43 kDa. Using Western bloting assay, this protein was recognized by the sera from dog immunized with \{Ancylostoma\} caninum third\|stage infected larvae and used for screening library. \ Conclusion \ The AcAg, which \{exhibits\} 35% homologous to Caenorhabditis elegans gene unc\|89, is a novel specific antigen of A.caninum. Its ability to elicit the \{protective\} immunity and the probability of the recombinant protein as a vaccine need to be further evaluated.

Objective To observe the protective effect of ghrelin on hippocampal injury induced by global cerebral ischemia/reperfusion (I/R) and explore its effect mechanisms.Methods The male Sprague-Dawley (SD) rats were randomly divided into four groups,namely sham group,I/R group,normal saline (NS)+I/R group and Ghrelin+I/R group,with 42 rats in each group.The model of I/R was reproduced by clipping bilateral carotid artery of rats 15 minutes and then releasing them for 60 minutes.There were no challenges for rats in sham group,just exposed their carotid artery.Ghrelin+I/R group and NS+I/R group were challenged by injecting 1 μ.L ghrelin or NS into lateral ventricle before I/R.Some of brain tissue in the rats was harvested after experiment to determine the levels of malonaldehyele (MDA),myeloperoxidase (MPO) and glutathione (GSH) in hippocampus by using chemical colorimetry and observe infarct sizes and histopathology.Single extracellular neuron discharge in other rats was recorded to observe the activity of glutamic sensitive neurons (Glu-N) and γ-aminobutyric acid (GABA) sensitive neurons (GABA-N) in hippocampus CA1 region of rats suffered I/R.Results Compared with sham group,the levels of MDA and MPO in hippocampus of rats in the I/R group were raised markedly,the level of GSH was decreased significantly,the infarct sizes was increased significantly and pycnosis neurons were increased markedly.All sorts of indexes between NS+I/R group and I/R group showed no significantly statistical significance.Compared with NS+I/R group,the levels of MDA and MPO in hippocampus of rats in the Ghrelin+I/R group were decreased significantly [MDA (nmol/g):16.4 ± 4.2 vs.24.5 ± 6.7,MPO (nmol/g):6.4 ± 1.8 vs.10.2 ± 2.9,both P ＜ 0.05],the activity of GSH was risen remarkably (μmol/g:2.65 ± 0.72 vs.1.66 ± 0.50,P ＜ 0.05),the infarct sizes of hippocampus were reduced markedly [(43.9 ± 9.5)％ vs.(77.0 ± 12.7)％,P ＜ 0.01],the number of pycnosis neuron was reduced markedly (cells:36.2±4.5 vs.47.1 ±6.1,P ＜ 0.01).The results of electrophysiology showed that the discharge frequency of Glu-N and GABA-N in hippocampus CA1 region of rats in I/R group increased markedly as compared with sham group,and no significant difference in the discharge frequency of Glu-N and GABA-N between NS+I/R group and I/R group.Compared with NS+I/R group,injected ghrelin could make the discharge frequency of Glu-N in hippocampus CA1 region of rats decreased markedly (Hz:3.81 ±0.67 vs.4.98±0.33 at ischemia,3.01 ±0.37 vs.3.77 ± 0.41 at reperfusion,both P ＜ 0.05),and the discharge frequency of GABA-N increased markedly (Hz:5.62 ± 0.54 vs.3.62±0.39 at ischemia,4.81±0.48 vs.3.71±0.21 at reperfusion,both P ＜ 0.05).Conclusion Ghrelin might protect hippocampal neuron after I/R iniury,and neuron excitability decrease might be related.

Objective:This study aimed to explore the effects ofnesfatin-1 on gastric distension (GD)-sensitive neurons in the basomedial amygdala (BMA) and the potential mechanism for nesfatin-1 to regulate gastric motility through the arcuate nucleus (Arc).Methods:The projection of nerve fiber and expression of nesfatin-1 were observed by retrograde tracing and fluo-immunohistochemistry staining;The nuclei microinjection and nuclei electrical stimulation,extracellular discharges of single unit neuron were used to observe the effects ofnesfatin-1 on the GD neurons;Gastric motility recording in vivo were used to monitor the effects ofnesfatin-1 on the amplitude of constriction and frequency of gastric motility in conscious rats.Results:NUCB2/Nesfatin-1/fluorogold-double labeled neurons were from ARC to BMA;Nesfatin-1 could excited the firing rate of most of the GD-E neurons (4.25± 1.02 Hz vs.5.32± 1.17 Hz,P＜0.01) and decreased the firing rate of most of the GD-I neurons (3.73± 0.92 Hz vs.2.64± 0.86 Hz,P＜0.01),inhibited the gastric motility,amplitude and frequency,SHU9119 could weaken the responses induced by nesfaton-1;Electrical stimulation of the Arc,the firing rate of nesfatin-1-induced GD-response neurons (GD-E:5.14± 1.32 Hz vs.6.75± 1.84 Hz,P＜0.05;GD-I:2.84± 0.86 Hz vs.4.05± 1.12 Hz,P ＜0.05) and the gastric amplitude and frequency were increase.Conclusion:It was suggested that nesfatin-1 in the BMA plays an important role in decreasing gastric motility and the Arc may be involved in this regulation process.

Objective:To investigate the effects of Orexin peptides on feeding and energy metabolism in mice.Methods:The mice were divided into two groups:feeding group and metabolic group.The feeding group were injected with different doses (1,3 and 10 nmol) of orexin-A and orexin-B to observe their effects on feeding and the activity of tyrosine hydroxylase in liver.We used the metabolic cages and observed the changes of respiration rate and respiration rate of mice were under light condition,dark condition and fasting condition.Results:Compared with the control group,1 nmol and 10 nmol orexin-A significantly stimulated mice to feed (P ＜0.05) within 4 hours after injection,and the effect of 3 nmol orexin-A on feeding was not obvious,but increase the activity of tyrosine hydroxylase.Any dose of orexin-B did not show a stimulating effect on mice feeding.(P ＞0.05).In the light cycle,orexin-A could significantly reduce the respiration rate (RQ),the metabolic rate was significantly increased (P ＜0.05);In the dark cycle,orexin-A had no effect on RQ,but the metabolic rate was significantly rised (P ＜0.05);But the injection of orexin-A in fasting mice induced a brief increase in RQ and a significant increase in metabolic rate (P ＜0.05).Conclusion:Orexins may play an important role in regulating feeding and energy metabolism in mice.

Objective To research the functional role of thyroidal motilin and the effects of electric excitation of the paraventricular nuclei(PVN) on gastric motility and the levels of motilin in thyroid and plasma.Methods The expression of motilin in rat and human thyroid was detected by immunofluorescence staining.A phase Ⅲ-like contraction was recorded before and after thyroidectomy and after PVN excitation.The changes in concentrations of plasma FT3,FT4 and motilin were determined via radioimmunoassay (RIA).c-Fos expression of PVN after thyroidectomy and motilin expression in thyroid after PVN excitation were observed by immunohistochemical staining.Results There were motilin immunoreactive cells in rat and human thyroid.The phase Ⅲ-like contraction and concentration of motilin in plasma decreased significantly when measured on the second and fourth days after thyroidectomy(2d,P＜0.01 ;4d,P＜0.05).The expression of c-Fos in PVN after thyroidectomy was significantly increased(P＜0.05).An electric excitation of PVN could increase the concentration of motilin in plasma and thyroid and increase corresponding gastric motility in rats (P ＜0.05).The increased phase Ⅲ-like contraction by PVN excitation could be partially inhibited by administration of motilin receptor antagonist,GM-109 (P＜0.05).Excitation of PVN in thyroidectomized rats resulted in lower plasma motilin and less intense phase Ⅲ-like contraction of stomach,as compared with the sham operated control group(P＜0.05).Conclusion Motilin from the thyroid may be secreted into the peripheral plasma to affect gastric motility and PVN may modulate gastric motility and motilin expression in the thyroid.

Objective:To evaluate the cytotoxicity of different dental bonding agents to human dental pulp cells. Methods:Four dental bonding agents(Prime & Bond NT,Single Bond,Xeno Ⅲ and iBond) were diluted with the culture medium by a ratio of 1∶1 000,1∶2 000 and 1∶4 000(v/v), and the fourth passage of dental pulp cells were then exposed to agent dilutions for 12, 24 and 48 h respectively, then the morphological changes of pulp cells were observed with microscopy and cytotoxicity was analyzed with modified 3-(4,5-dimethyl-thiazol-2-yl)-2,5-diphenyl-tetrazolium bromide (MTT) assay.Results:There was significant influence of the type of dental bonding agents,exposure time and concentration on the cell morphology. Total-etch system was more toxic than self-etch system.Conclusion:Dental bonding agents are toxic to pulp cells,Single Bond is the strongest cytotoxic agent among the 4 adhesive agents.

Objective To explore the expression of transient receptor potential channel 6(TRPC6)in human breast cancer cells, and to clarify the correlation of TRPC6 with the invasion potential of breast cancer cells. Methods The human breast cancer cell strains MCF-7 (hypo-invasion group)and MDA-MB-231 (hyper-invasion group)were cultured.The expressions of TRPC6 mRNA and protein in in two groups were detected by RT-PCR and Western blotting methods.Then the MDA-MB-231 cells were divided into control group and SKF96365 group, the effects of SKF96365 on the invasion ability of MDA-MB-231 cells invitro were explored by wound healing assay and Transwell experiment.Results The results of Western blotting and RT-PCR showed that the expression levels of TRPC6 mRNA and protein in MDA-MB-231 cells were higher than that in MCF-7 cells(P<0.05).The wound healing assay showed the numbers of migrating cells in 5,25 and 40μmol·L-1 SKF96365 groups (76.24±7.54, 45.33±4.50,25.12±1.57)were lower than those in control group (130.48±9.55)(P<0.05).The Transwell experiment results indicated that the invasiveness of MDA-MB-231 cells were inhibited significantly by SKF96365 compared with control group (P<0.05).Conclusion The invasion ability of human breast cancer MDA-MB-231 cells is promoted by upregulating the TRPC6 expression, which indicates that the TRPC6 may play role in the metastasis of human breast cancer.

Objective:To evaluate the nutritional status before and after chemotherapy in patients with colon cancer by measuring energy metabolism and body composition.Methods:Fifty-one patients with colon cancer were included and were investigated using self-control method (before and after chemotherapy).Resting energy expenditure (REE) was determined by bed metabolic instrument,and body composition was measured by body composition analyzer.Results:For all patients,the REE on the 2nd day after chemotherapy was decreased significantly compared with that before chemotherapy (P ＜ 0.05).After chemotherapy,body fat percentage and body moisture percentage were increased significantly (P ＜ 0.05),and lean body mass percentage was decreased significantly (P ＜ 0.05).Conclusion:After chemotherapy,the REE and lean body mass percentage of the patients with colon cancer were decreased,and body fat percentage and body moisture percentage were increased.