ABSTRACT
Objective To detect the expressions of BMPR Ⅰa of BMPs/BMPR/Smads signaling transduction pathway in human brain glioma ,to research the role of its in tumorigenesis and progression of brain glioma and its correlation to clinical pathology . Methods The mRNA and protein expressions of BMPR Ⅰa was detected in 20 normal brain tissues and 40 samples with human glioma by RT-PCR and SABC immunohistochemical methods ,repectively ,and analyzed the correlation with the patient′s age ,gender and pathological grade .Results Compared with normal brain tissues ,BMPR Ⅰa mRNA and protein expressions in human glioma were reduced significantly ,especially in Ⅲ and Ⅳ stage tumor tissues .The difference was not related with the patient′s age and gender .Conclusion In progression of glioma ,BMPR Ⅰa may play a role in restraining ,and has nothing to do with age and sex .
ABSTRACT
BACKGROUND:The transplanted bone marrow stem cells (BMSCs) survive,migrate to the injury site and differentiate into neurons and astrocytes.Transplantation of BMSCs following spinal cord injury (SCI) may improve the recovery of spinal function and may be an effect way for treating spinal cord injury.The treatment of spinal cord injury by autologous BMSCs mobilization and surgical transplantation has a wide prospect of clinic application.However,it is still unclear whether outcomes and mechanisms of them are different.OBJECTIVE:To compare the efficacy of treating SCI in rats by mobilization and surgical transplantation of autologous BMSCs,and assess the two methods by qualitative indexes.DESIGN,TIME AND SETTING:A randomized controlled animal experiment was conducted at the Henan Province People's Hospital from June 2007 to April 2008.MATERIALS:A total of 90 healthy Sprague Dawley rats aged 10 wees old,half male and half female,weighing (240±10) g,were subjected to make spinal cord injury models.MATHODS:After 3 days injection with bromodeoxyuridine 50 mg/kg per day,BMSCs were isolated from bone marrow of healthy rats.All the rats were underwent spinal cord injury by NYU impactor.All 90 rats were randomly divided into 3 groups,with 30 for each group.Rats in the mobilization group were subcutaneously injected with grenulocyte-colony stimulating factor for 7 days,20 mg/kg per day.In surgical transplantation group,a total of 0.3 mL (1×10~(10)/L) BMSCs were transplanted into injured area of spinal cord.Rats in control group were given the same volume of saline (0.3 mL) into injured area of spinal cord.All the rats were injected with 50 mg/kg bromodeoxyuridine daily at day 3 before surgery for 10 days in each group.MAIN OUTCOME MEASURES:The Basso-Beattie-Brasnahan (BBB) locomotor score was used to evaluate functional recovery in rat hindlima at 3 days,1,2,4 and 8 weeks after SCI.Motion evoked potential (MEP) and somatosensory evoked potential (SEP) tests were performed to defect the neural pathway so as to evaluate recovery of injured spinal cord.The cell structural changes and the expression and distribution of Brdu,glial fibrillary acidic protein (GFAP),and neuron specific enolase (NSE) were observed by pathological and immunohistochemical methods.and 8 weeks after injury (P ＜ 0.05),but there was no significant difference between the mobilization group and surgical was increased in the mobilization group and surgical transplantation group compared with the control group (P ＜ 0.05-0.01),but Histopathology showed that there were less empty,necrosis and GFAP-positive glial scar tissue,more Brdu-positive cells and NSE-positive cells in the mobilization group and surgical transplantation group than in the control group.CONCLUSION:Autologous BMSCs mobilization transplantation and surgery transplantation could significantly reduce the degree of SCI,and promote the recovery of the spinal cord function after injury for treating SCI.Compared between the two,mobilization of autologous BMSCs are more convenient,non-invasive,more likely to seize the opportunity to treatment.
ABSTRACT
OBJECTIVE: In recent years, in the field of neurosurgery, people have tried to study the mesenchymal stem cells(MSCs) transplantation for treatment of spinal cord injury and review its related studies.DATA SOURCES: We did a computer-search of Medline for spinal cord injury related articles published in English from January 1990 to November 2004, with the key words of "mesenchymal stem cells, transplantation,spinal cord injury". Meanwhile, We also searched Chinese Biomedical Literature Database (CBM) for bone marrow-derived mesenchymal stem cells for transplantation of spinal cord injury related articles published from January 1990 to November 2004, with the key words of "mesenchymal stem cells, transplantation, spinal cord injury" in Chinese.STUDY SELECTION: All articles were selected firstly, and those relevant to progression of mesenchymal stem cells transplantation in spinal cord injury therapy were collected. The full texts of the rest literatures were looked up and the latest evolutional articles were enrolled.DATA EXTRACTION: A total of 32 articles about the mesenchymal stem cells transplantation in spinal cord injury therapy were collected. After the exclusion of repetitive or similar studies, 19 articles met our criteria.DATA SYNTHESIS: Aiming at the spinal cord injury therapy by means of mesenchymal stem cells transplantation, the viewpoints of collected articles were summarized. We found bone marrow derived mesenchymal stem cells could supply lesioned part as filler. Directional regeneration accomplishes the construction of the function that transfers up and down for the nerve cell anchor through surrounding structure. The microenvironment which can inhibit the regeneration of the glial cell, protect the survival of nerve cell body, promote the regeneration of autogenic nerve cells shall be created in transplant. The international successful experience was introduced emphatically, and the most hopeful outlook was suggested.CONCLUSION: The transplanted MSCs survive, migrate to the injury site and differentiate into neurons and astrocytes. Transplantation of MSCs following spinal cord injury may improve the recovery of spinal function and may be an effect way in treating spinal cord injury.