OBJECTIVETo study the effects of Jisuikang (Chinese characters) on Nogo-NgR gene expression, and to explore the protective effects and mechanism of Jisuikang (Chinese characters) on spinal cord injury in rats.

METHODSOne hundred eighty female rats were randomly assigned to 6 groups(30 rats per group). Sham group: T10 lamina was resected only and spinal cord was untreated. Model group: spine cord injury (SCI) was created with a modified impinger of Allen's by impacting on the T10 spinal cord. Prednisolone group: Prednisolone (0.06 g/kg) was given by intragastric administration at a time interval of 24 hours after operation. The Jisuikang (Chinese characters) high, moderate and low dose groups: Jisuikang (Chinese characters) was supplied with different dose (50 g/kg, 25 g/kg, 12.5 g/kg) by intragastric administration in rats after operation,for the first time at 30 min after surgery. Animals were killed 3, 7, 14 days after surgery. The expression levels of Nogo-A and NgR were observed by Western Blot and Real-time PCR.

RESULTSThe expression of Nogo-A and NgR was at the basic level at all time points in sham group. Compared with model group, the protein expression levels of Nogo-A and NgR in sham, prednisolone, Jisuikang (Chinese characters) moderate dose groups were statistically significant at all time points (P < 0.05). No difference was found in Jisuikang (Chinese characters) high and low dose groups (P > 0.05). Three days after surgery, the mRNA levels of Nogo-A and NgR in treatment group were significantly lower than that in model group (P < 0.01); 7 days after surgery,Nogo-A and NgR mRNA expression were dramatically upregulated and peaked; 14 days after operation, the expression was decreased, but still significantly higher than that in other treatment groups (P < 0.01). Prednisolone and Jisuikang (Chinese characters) moderate dose groups showed the most significant effects among all groups,but there was no statistically significant difference between two groups (P > 0.05).

CONCLUSIONThe decoction Jisuikang (Chinese characters) can promote the nerve cell regeneration by regulating Nogo-A and NgR gene expression, activating Nogo- NgR signaling pathways after acute spinal cord injury.

Animals ; Female ; GPI-Linked Proteins ; analysis ; genetics ; physiology ; Medicine, Chinese Traditional ; Myelin Proteins ; analysis ; genetics ; physiology ; Nerve Regeneration ; drug effects ; Nogo Proteins ; Nogo Receptor 1 ; Rats ; Rats, Sprague-Dawley ; Receptors, Cell Surface ; analysis ; genetics ; physiology ; Signal Transduction ; drug effects ; Spinal Cord Injuries ; drug therapy ; metabolism

ObjectiveThe aim of this study was to evaluate and compare the surgical outcomes of endoscop ic and conventional open thyroidectomies in patients with thyroid disease.Methods116 patients with tyroid tumor were enrolled.56 patients underwent endoscopic thyroidectomy ( endoscopic group ),and 60 patients underwent conventional open thyroidectomy( conventional group).We analyzed the patients' clinic characteristics,surgical outcomes and complications between the two groups.ResultsThe blood loss was less in the endoscopic group than the open group[( 16.8 ± 9.6) ml vs ( 24.9 ± 14.2 ) ml,t =- 2.427,P ＜ 0.05].The degree of satisfaction for cosmetic outcome in endoscopy group( 96.4％ ) was higher than that in conventional group ( 16.7％ ) ( x2 =74.508,P ＜ 0.01 ).There was no significant difference in the operating time,volume of drainage and postoperative hospital stay between two groups,and there was no significant difference in the skin ecchymosis,redness and swelling and postoperative pain between two groups( all P ＞ 0.05).No severe postoperative complication was encountered,such as injuries of the re current or superior laryngeal nerve,parathyroid gland injury or massive hemorrhage.ConclusionEndoscopic thyroidectomy has less blood loss,mini-open and excellent cosmetic benefits compared with conventional open thyroidectomy.

Objective To investigate the variance of cost-effectiveness when treat acute myocardial infaretion of different severe extents with different pattern.Methods Acute myocardial infarction patients were selected from emergency eommand center of Guangzhou from October 2003 to December 2005.These patients wew assigned by the center to First-Class Hospitals at Grade 3 and First-class Hospital at Grade 2,and were followed up after 6 months after post-discharge.Cost in hospital and mortality in hospital were registered.The health of all patients were quantificated using SF-36.According to the assigned hospitals,the patients were divided into single infarction group and complex infarction group.Cost in hospital,mortality in hospital,short-term quality of life were compared between the them.Results Compared with and First-Class Hospital at Grade 2 (101 cases),the single infarction patients in First-Class Hospitals at Grade 3 had higber costs in hospital (P=0.016),better society function,affection role,mental health and health status (P

OBJECTIVETo establish a finite element model of canine segmental mandibular reconstruction by partial-cortical-cutting distraction osteogenesis.

METHODSThe geometry model was established by Mimics software via reading the data of DICOM format from CT and was cut with Magics software. The finite element model was established and was analyzed by MARC software.

RESULTSA finite element model of canine segmental mandibular reconstruction by partial-cortical-cutting distraction osteogenesis was established. The model was composed of five parts. These five parts were felted via Magics software. The Von Mises stress of the joint region of slice and the slide segment were 34.60 MPa when the slide segment was retained 1.4 mm width during distraction osteogenesis with the force of 12 N.

CONCLUSIONThe biomechanics analysis can be complated through the finite element model of canine segmental mandibular reconstruction by distraction osteogenesis that retains lingual cortical bone.

Finite Element Analysis ; Humans ; Mandible ; Mandibular Reconstruction ; Osteogenesis, Distraction ; Reconstructive Surgical Procedures

OBJECTIVETo evaluate clinical result of the micro-decompression procedure for lumbar spinal stenosis.

METHODSFrom September 2001 to May 2006,87 patients (male 60, female 27) with lumbar spinal stenosis underwent micro-decompression. The age of patients were from 43 to 80 years with an average of 51 years. Among them,2 cases with spinal stenosis occured in L(3,4), 47 in L(4,5), 38 in L5S1.

RESULTSAll patients were followed up for 18-48 months with an average of 26 months. The results were excellent in 52 cases, good in 28, poor in 7, according to Macnab of back leg pain standard. The rate of excellent and good was 92%.

CONCLUSIONOperative treatment for lumbar spinal stenosis is focused at the areas causing symptomatic neural root compression rather than prophylactic decompression at areas of nonsymptomatic disease. The micro-decompression procedures are more likely to be well tolerated by older patients.

Adult ; Aged ; Aged, 80 and over ; Decompression, Surgical ; Female ; Follow-Up Studies ; Humans ; Lumbar Vertebrae ; surgery ; Male ; Middle Aged ; Spinal Stenosis ; surgery ; Treatment Outcome

Objective To compare the efficacy of transplanting bone marrow mesenchymal stem cell (BMSC) or microenvironmental induced BMSC ( iBMSC) into the ischemic myocardium of rats with myocardial infarction. Methods iBMSC was defined as BMSC co-cultured with myocardial cells for 2 weeks. The stem cells or equal volume PBS were injected into ischemic border zone 1 wk after experimental infarction. Cardiac performance was evaluated at 1, 2, and 4 wk after cell transplantation by echocardiography and analyzed histologically at 4 wk after cell transplantations. Results Compared with PBS group, both BMSC and iBMSC transplantations reduced infarct size. iBMSC enhanced the beneficial effects of BMSC on improving cardiac function (FS: 28.5% ±4.3% in PBS, 29.0% ±2.0% in BMSC and 45. 1% ±3. 1% in iBMSC group at 4 weeks post transplantation, iBMSC group vs. PBS group P <0. 05, iBMSC group vs. BMSC group P <0. 05). Immunofluorescence microscopy results revealed co-localization of SPIO-labeled transplanted cells with cardiac markers for cardiomyocytes, indicating regeneration of damaged myocardium. Conclusion Our data suggest that iBMSC implantation is more effective on improving cardiac function than BMSC implantation in this model. iBMSC might serve as a new promising therapeutic cell source for regenerating ischemic myocardium in patients with post-infarction heart failure.

OBJECTIVETo evaluate the epidemiological status of HER2 protein expression in Chinese patients with gastric carcinoma, and to study its clinical and prognostic significance and the association with the clinicopathological features.

METHODSThe clinical data were reviewed in 860 patients with gastric carcinoma admitted to Guangdong General Hospital from 2003 to 2010. The HER2 status was evaluated using immunohistochemistry (IHC). The modified HercepTest scoring criterion was used to assess HER2 protein expression. The association between HER2 expression and clinicopathological features was analyzed by χ(2) test. Kaplan-Meier analysis, log-rank test and Cox regression model were used for the survival analysis.

RESULTSThe median age of the patients was 59 years, and the male-to-female ratio was 2.06:1. Positive expression of HER2 protein (3+) was found in 77 (9.0%) cases of gastric carcinoma, and in 69 (8.9%) advanced gastric cancers. There was significantly positive association between HER2 over-expression and tumor differentiation, Lauren classification and WHO classification. No significant association was observed between HER2 protein expression and patients' age, gender, tumor location and clinical stage. There was no statistically significant difference in survival rate between patients with positive HER2 expression and negative ones.

CONCLUSIONThough there was significantly positive association between HER2 expression status and tumor differentiation, histological type, it may be of limited prognostic value in gastric cancer patients.

Adenocarcinoma ; metabolism ; pathology ; surgery ; Adenocarcinoma, Mucinous ; metabolism ; pathology ; surgery ; Adenocarcinoma, Papillary ; metabolism ; pathology ; surgery ; Adult ; Aged ; Aged, 80 and over ; Asian Continental Ancestry Group ; Carcinoma, Signet Ring Cell ; metabolism ; pathology ; surgery ; Female ; Follow-Up Studies ; Humans ; Kaplan-Meier Estimate ; Male ; Middle Aged ; Neoplasm Staging ; Proportional Hazards Models ; Receptor, ErbB-2 ; metabolism ; Stomach Neoplasms ; metabolism ; pathology ; surgery ; Survival Rate ; Young Adult

Objective To investigate the ability of human bone marrow mesenchymal stem cells (hBMSCs), eocultured with semi-permeable membrane separated neonatal rat ventricular myocytes, to differentiate into cardiomyocytes.Methods hBMSCs were isolated and purified by density gradient centrifugation and adherence screening method.cells were expanded as undifferentiated cells in culture for more than 3 passages and their phenotypes were identified with flow cytometer, hBMSCs were cocuhured with neonatal rat ventricular myocytes in a rate of 1:10 separated by semi-permeable membrane.GATA4 mRNA was detected by RT-PCR; Immunocytochemistry, and Immunostaining were used to detect sarcomeric α-actinin, desmin, cTnT, and cTnI protein level.Results CD29 (98.64% ± 0.80%) and CD44 (96.70% ± 1.50% ) were the major surface markers of hBMSCs.After coculturing with semi-permeable membrane separated neonatal rat ventricular myocytes, the first contraction of single cells was noted at day 7 and GATA4 expression was detected on these cells by RT-PCR after 1 to 3 weeks coculture.Desmin, sacomefic ±-actinin, cTnI and cTnT could be detected by immunocytochemistry and immunostaining on some of these cells.conclusion hBMSCs possess the potential to differentiate into myocardial cell phenotype in the cardiac microenvironment.Direct contact with cardiomyocytes was not necessary required for hBMSCs differentiation.

The acquisition of metastasis potential is a critical point for malignant tumors. Melanoma differentiation associated gene-7/interleukin-24 (mda-7/IL-24) is a potential tumor suppress gene and frequently down-regulated in malignant tumors. It has been implicated that overexpression of MDA-7 led to proliferation inhibition in many types of human tumor. Invasion is an important process which is potential to promote tumor metastasis. However, the role and potential molecular mechanism of mda-7/IL-24 to inhibit the invasion of human melanoma cancer is not fully clear. In this report, we identified a solid role for mda-7/IL-24 in invasion inhibition of human melanoma cancer LiBr cells, including decreasing of adhesion and invasion in vitro, blocking cell cycle, down-regulating the expression of ICAM-1, MMP-2/9, CDK1, the phosphorylation of ERK and Akt, NF-kappaB and AP-1 transcription activity. Meanwhile, there was an increased expression of PTEN in mda-7/IL-24 over-expression LiBr cells. Our results demonstrated that mda-7/IL-24 is a potential invasion suppress gene, which inhibits the invasion of LiBr cells by the down-regulation of ICAM-1, MMP-2/9, PTEN, and CDK1 expression. The molecular pathways involved were the MAPK/ERK, PI3K-Akt, NF-kappaB, and AP-1. These findings suggest that mda-7/IL-24 may be used as a possible therapeutic strategy for human melanoma cancer.
CDC2 Protein Kinase/genetics/metabolism ; Cell Line, Tumor ; Cell Movement ; Down-Regulation ; G2 Phase Cell Cycle Checkpoints ; Humans ; Intercellular Adhesion Molecule-1/genetics/metabolism ; Interleukins/genetics/*metabolism ; M Phase Cell Cycle Checkpoints ; Matrix Metalloproteinase 2/genetics/metabolism ; Matrix Metalloproteinase 9/genetics/metabolism ; Melanoma/metabolism/pathology ; NF-kappa B/genetics/metabolism ; PTEN Phosphohydrolase/genetics/metabolism ; Phosphorylation ; Proto-Oncogene Proteins c-akt/genetics/metabolism ; Transcription Factor AP-1/genetics/metabolism ; Up-Regulation

This study was aimed to investigate the effect of human umbilical vein endothelial cells (HUVEC) on dendritic cell (DC) development. First, HUVEC were isolated from human umbilical cord by collagenase digestion, and then the morphology, immunophenotypes and functions were identified. Furthermore, the HUVEC were cocultured with CD14(+) monocytes under the cytokine condition for detecting the influence of HUVEC on differentiation of CD14(+) cells to DC. The phenotype of dendritic cells derived from CD14(+) cells was analyzed by flow cytometry, the immunoregulatory function of DC was tested by mixed lymphocyte reaction (MLR). The change of IL-6 and VEGF as well as EPK and p38 signal pathway were analyzed by neutral antibody experiment and Western blot. The results showed that HUVEC isolated from human umbilical cord were characterized by spindle-shaped morphology, homogenous immunophenotypes (vWF(+)CD31(+)CD73(+)CD45(-)HLA-DR(-)CD86(-)CD34(low)), Dil-Ac-LDL incorporation ability and forming capillary-like structures. Following stimulation with granulocyte-macrophage colony-stimulating factor (GM-CSF) plus interleukin-4 (IL-4), HUVEC cocultures could inhibit the initial differentiation of CD14(+) monocyte to DC. Interestingly, IL-6 and VEGF enhanced the suppression effect of HUVEC on generation of DC via activation of the ERK or p38 mitogen activated protein kinase pathway. It is concluded that HUVEC are involved in DC development and can suppress the differentiation of monocyte to DC.
Cell Differentiation ; Coculture Techniques ; Dendritic Cells ; cytology ; Human Umbilical Vein Endothelial Cells ; cytology ; Humans ; Monocytes ; cytology