摘要:
An ultrasound-mediated gene transfer method named Ultrasound Targeted Microbubble Destruction (UTMD) for the delivery of human vascular endothelial growth factor (hVEGF) gene to transplanted islets and the surrounding tissue is described herein. The delivery of hVEGF promotes islet revascularization and survival. The inventors, first transplanted human islets were transplanted into diabetic nude mice liver followed by the induction of non-viral plasmid vectors encoding hVEGF or Green Fluorescent Protein (GFP) gene in the host liver by UTMD. Transplantation without gene delivery was also performed as a control. Blood glucose, serum human insulin, C-peptide levels and the revascularization in graft islets were evaluated. The findings of the method of the present invention indicated that hVEGF gene delivery to host liver using UTMD promoted islet revascularization after islet transplantation and improved the restoration of euglycemia.
摘要:
The introduction of the human NeuroD1 gene into human non-endocrine pancreatic epithelial cells (NEPECs) for producing insulin producing cells in vitro is described herein. Cytokeratin19 (CK19) positive NEPECs were transfected with plasmids encoding human NeuroD1 gene under human CK19 promoter. On characterization following the induction it was found that NEPEC+ND strongly expressed NeuroD1 and insulin mRNA. The ratio of NeuroD1 and human insulin positive cells in NEPEC+ND was significantly higher than NEPEC. Human insulin and C-peptide levels in culture media in NEPEC+ND were significantly higher than NEPEC. The findings demonstrate that human NeuroD1 under control of the CK19 promoter induces the differentiation of CK19 positive NEPECs into insulin producing cells.
摘要:
The present invention includes a method of isolating pancreatic islets by density centrifugation wherein the pancreatic islets are loaded in a solution comprising pancreatic islets with the density gradient and the islets are isolated by centrifuging the vessel wherein the pressure on the pancreatic islets is less than 50 Pa and wherein the pancreatic islets are isolated from the gradient, the improvement comprising creating a continuous density gradient in a vessel comprising at least 100 milliliters with a bend tube that reduces convection currents that disrupt the gradient.
摘要:
A power-driven grass mower includes an operation division having a grass cutter; a motor division having an electric motor and a power-source division having a battery, wherein the operation division is provided with a first means for watching if the motor division is locked for some reason or other, and a second means for putting the motor division into the inching operation in response to any signal from the first means indicating that the motor division is in a locking condition.
摘要:
A power-driven grass mower includes an operation division having a grass cutter; a motor division having an electric motor and a power-source division having a battery, wherein the operation division is provided with a first means for watching if the motor division is locked for some reason or other, and a second means for putting the motor division into the inching operation in response to any signal from the first means indicating that the motor division is in a locking condition.