Objective To observe the effect of tuina on glutamate content and synaptic ultrastructure in spinal dorsal horn of rats with chronic sciatic nerve compression injury;To explore the potential mechanism of tuina regulation of the SNAP25/VGLUT2 pathway in alleviating lumbar disc herniation.Methods A chronic sciatic nerve compression injury model was used to simulate neuropathic pain in lumbar disc herniation.24 SD rats were randomly divided into blank group,model group and tuina group,with 8 rats in each group.From the 4th day after modeling,the tuina group was intervened with the tuina method for 10 minutes once a day for 14 consecutive days.The paw withdrawal threshold(PWT)and paw withdrawal latency(PWL)of rats in each group on the day before modeling,and the 4th,10th,14th and 17th days after modeling were detected.The spinal cord tissue of the modeling side was taken,synaptic ultrastructure of spinal dorsal horn neurons was observed using transmission electron microscopy,immunofluorescence staining was used to detect the expression of NR2A in the spinal dorsal horn,Western blot was used to detect the expression of SNAP25 protein in the spinal dorsal horn,immunohistochemistry was used to detect the expression of VGLUT2 in the spinal dorsal horn,ELISA was used to detect the content of glutamate in the spinal dorsal horn.Results Compared with the blank group,PWT and PWL of the model group were significantly reduced on the 4th,10th,14th and 17th days after modeling(P<0.001),with accumulation of vesicles in the presynaptic membrane of the dorsal horn of the spinal cord,increase in the area of the postsynaptic dense zone,and enlargement of the synaptic cleft,while the protein expressions of NR2A,SNAP25 and VGLUT2 in the spinal dorsal horn increased(P<0.05,P<0.001),and the content of glutamate increased(P<0.001).Compared with the model group,PWT and PWL of the tuina group rats significantly increased on the 10th,14th and 17th days after modeling(P<0.001),synaptic vesicles were evenly distributed,the area of the postsynaptic dense zone decreased,and the synaptic cleft decreased,while the protein expressions of NR2A,SNAP25 and VGLUT2 in the spinal dorsal horn decreased(P<0.05,P<0.001),and the content of glutamate decreased(P<0.01).Conclusion Tuina may regulate the content of glutamate through the SNAP25/VGLUT2 pathway in the spinal dorsal horn,improve the synaptic ultrastructure of neurons,and have an analgesic effect on lumbar disc herniation.

Objective To observe the effect of tuina on glutamate content and synaptic ultrastructure in spinal dorsal horn of rats with chronic sciatic nerve compression injury;To explore the potential mechanism of tuina regulation of the SNAP25/VGLUT2 pathway in alleviating lumbar disc herniation.Methods A chronic sciatic nerve compression injury model was used to simulate neuropathic pain in lumbar disc herniation.24 SD rats were randomly divided into blank group,model group and tuina group,with 8 rats in each group.From the 4th day after modeling,the tuina group was intervened with the tuina method for 10 minutes once a day for 14 consecutive days.The paw withdrawal threshold(PWT)and paw withdrawal latency(PWL)of rats in each group on the day before modeling,and the 4th,10th,14th and 17th days after modeling were detected.The spinal cord tissue of the modeling side was taken,synaptic ultrastructure of spinal dorsal horn neurons was observed using transmission electron microscopy,immunofluorescence staining was used to detect the expression of NR2A in the spinal dorsal horn,Western blot was used to detect the expression of SNAP25 protein in the spinal dorsal horn,immunohistochemistry was used to detect the expression of VGLUT2 in the spinal dorsal horn,ELISA was used to detect the content of glutamate in the spinal dorsal horn.Results Compared with the blank group,PWT and PWL of the model group were significantly reduced on the 4th,10th,14th and 17th days after modeling(P<0.001),with accumulation of vesicles in the presynaptic membrane of the dorsal horn of the spinal cord,increase in the area of the postsynaptic dense zone,and enlargement of the synaptic cleft,while the protein expressions of NR2A,SNAP25 and VGLUT2 in the spinal dorsal horn increased(P<0.05,P<0.001),and the content of glutamate increased(P<0.001).Compared with the model group,PWT and PWL of the tuina group rats significantly increased on the 10th,14th and 17th days after modeling(P<0.001),synaptic vesicles were evenly distributed,the area of the postsynaptic dense zone decreased,and the synaptic cleft decreased,while the protein expressions of NR2A,SNAP25 and VGLUT2 in the spinal dorsal horn decreased(P<0.05,P<0.001),and the content of glutamate decreased(P<0.01).Conclusion Tuina may regulate the content of glutamate through the SNAP25/VGLUT2 pathway in the spinal dorsal horn,improve the synaptic ultrastructure of neurons,and have an analgesic effect on lumbar disc herniation.

Objective To observe the effects of tuina on P2Y12/RhoA/ROCK2 pathway and c-Fos protein expression of microglia in spinal dorsal horn of sciatic nerve chronic compressive injury(CCI)rats;To explore the mechanism of tuina in treating lumbar disc herniation.Methods A CCI model of right sciatic nerve was used to simulate neuropathic pain in lumbar disc herniation.24 male SD rats were randomly divided into blank group,model group and tuina group,with 8 rats in each group.After 4 days of modeling,massage intervention was used to in the tuina group for 14 days.The paw withdrawal threshold(PWT)and paw withdrawal latency(PWL)of rats before and on the 4th,10th,and 17th day after modeling were observed,immunofluorescence staining was used to detect the expression of Iba1 and P2Y12 protein in right spinal dorsal horn,Western blot was used to detect the expressions of RhoA and ROCK2 protein in right spinal dorsal horn,immunohistochemistry staining was used to detect the number of c-Fos positive cells in right spinal dorsal horn.Results Compared with the blank group,the PWT and PWL of the model group were significantly reduced on the 4th,10th,and 17th day after modeling(P<0.001),while the expressions of Iba1,P2Y12,RhoA and ROCK2 protein in right spinal dorsal horn significantly increased(P<0.001,P<0.05),the number of c-Fos positive cells significantly increased(P<0.001).Compared with the model group,the PWT and PWL of the tuina group significantly increased on the 10th and 17th day after modeling(P<0.05,P<0.01,P<0.001),and the expressions of Iba1,P2Y12,RhoA and ROCK2 protein in right spinal dorsal horn significantly decreased(P<0.001,P<0.01,P<0.05),and the number of c-Fos positive cells significantly reduced(P<0.001).Conclusion Tuina may inhibit the activation of microglia by regulating P2Y12/RhoA/ROCK2 pathway and c-Fos protein expression in spinal dorsal horn,reduce neuronal excitability,and exert analgesic effects on lumbar disc herniation.

OBJECTIVEIn vivo Micro-PETICT imaging of mouse/rat brain has been widely used to non-invasively monitor brain and provides researchers a better understanding of therapeutic effects in models of human neurological disease. For the need of further processing, extraction of brain tissue from head is required and vital.

METHODSAn automatic multistep combination methods was proposed based on an improved level set framework, which includes (1) Use Fuzzy-C-Means method together with threshold and morphology methods to get the initial level-set surface automatically. (2) Combine gradient vector flow to enhance the gradient contrast and enforce the surface move toward to the object's surface much faster, especially obtain a significantly improvement in the regions of forehead and the joint between brain and neck. (3) introduce an automatic stop condition based on average bandwidth energy maximization to overcome the leakage problem.

RESULTS3 Micro-CT images of rat and 3 of mouse have been tested using the proposed methods and the average accuracy has increased by 33% for rat and 6.7% for mouse. The average processing duration for rat and mouse are about 8 minutes and 4 minutes, respectively.

CONCLUSIONSThe proposed methods were proved that it can be effectively used for Micro-PET/CT imaging of mouse/rat brain segmentation and have a great improvement on accuracy and convenience.

Animals ; Image Processing, Computer-Assisted ; methods ; Imaging, Three-Dimensional ; methods ; Mice ; Neuroimaging ; methods ; Pattern Recognition, Automated ; methods ; Rats ; X-Ray Microtomography ; methods

This paper summerized the surgical treatment of primary bronchogenic carcinoma in 3568 cases between 1957-1991. The resectability rate was 90. 3%, postoperative morbidity rate 8.32% and operative mortality 0. 89%. Pathological diagnoses of the resected specimens included squa-mous cell carcinoma for 48.7%, adenocarcinoma 22.9%, small cell cancer 15. 4%, large cell cancer 1. 3% and squa-mous-adenocarcinoma in 10.1%. The follow-up rate was 93%. The 5-and 10-year survival rates were 34.6% and 22.79% respectively. Analyses of the data demonstratad that the histologic type, pathological stage and metastasis of mediastinal lymph node are the important factors affecting the prognosis. According to UICC P-TNM,42. 6% of the patients in this group were in stage III. The 5 year survival rate was 19% in IIIa patients and 6% in IIIb. According to authors experience, it is recommended that in IIIa patients with nonsmall cell cardinoma, active surgical treatment should be adopted; in patients with small cell carcinoma, chemotherapy and radiotherapy should be given pre-and postoperatively, in IIIb patients with small cell carcinoma, surgical treatment is generally not indicated.