Biomaterial Database

[Regulatory effect of antisense VEGF121 cDNA transfection on angiogenesis and metastasis of human lung giant cell carcinoma]. 2000

X Wu, and J Zheng, and J Fu

Department of Pathology, Peking University, Beijing 100083, China.

OBJECTIVE To study the regulatory effect of antisense VEGF121 cDNA transfection on endogenous VEGF secretion and angiogenesis of human metastatic lung carcinoma cell line PG and explore the significance of microvessel density (MVD) in tumor growth and metastasis. METHODS The eukaryotic expression vectors bearing antisense VEGF121 cDNA was transfected into PG cells. Human umbilical vein endothelial cells (HUVEC) were cultured in conditioned mediums from transfected cells, and proliferation was determined by methyl thiazolyl tetrazolium (MTT) and 3H thymidine incorporation (3H TdR) assays in vitro. Microvessel density (MVD) in xenografted tumors in nude mice was analyzed by immunohistochemistry. RESULTS The transfectant of antisense VEGF121 cDNA exhibited a reduction in VEGF secretion. HUVEC grown in conditioned medium from the antisense VEGF transfected cells exhibited a decrease in capacities of DNA syntheses and cell proliferation. MVD of tumor with transfected antisense VEGF gene was significantly lower than that in control vector. CONCLUSIONS Antisense VEGF gene transfection can inhibit vascular endothelial cell proliferation in vitro and tumor angiogenesis in vivo, which may explain its inhibitory effects on tumor growth and metastasis.

UI	MeSH Term	Description	Entries
D008175	Lung Neoplasms	Tumors or cancer of the LUNG.	Cancer of Lung,Lung Cancer,Pulmonary Cancer,Pulmonary Neoplasms,Cancer of the Lung,Neoplasms, Lung,Neoplasms, Pulmonary,Cancer, Lung,Cancer, Pulmonary,Cancers, Lung,Cancers, Pulmonary,Lung Cancers,Lung Neoplasm,Neoplasm, Lung,Neoplasm, Pulmonary,Pulmonary Cancers,Pulmonary Neoplasm
D008222	Lymphokines	Soluble protein factors generated by activated lymphocytes that affect other cells, primarily those involved in cellular immunity.	Lymphocyte Mediators,Mediators, Lymphocyte
D008819	Mice, Nude	Mutant mice homozygous for the recessive gene "nude" which fail to develop a thymus. They are useful in tumor studies and studies on immune responses.	Athymic Mice,Mice, Athymic,Nude Mice,Mouse, Athymic,Mouse, Nude,Athymic Mouse,Nude Mouse
D009368	Neoplasm Transplantation	Experimental transplantation of neoplasms in laboratory animals for research purposes.	Transplantation, Neoplasm,Neoplasm Transplantations,Transplantations, Neoplasm
D009389	Neovascularization, Pathologic	A pathologic process consisting of the proliferation of blood vessels in abnormal tissues or in abnormal positions.	Angiogenesis, Pathologic,Angiogenesis, Pathological,Neovascularization, Pathological,Pathologic Angiogenesis,Pathologic Neovascularization,Pathological Angiogenesis,Pathological Neovascularization
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D014162	Transfection	The uptake of naked or purified DNA by CELLS, usually meaning the process as it occurs in eukaryotic cells. It is analogous to bacterial transformation (TRANSFORMATION, BACTERIAL) and both are routinely employed in GENE TRANSFER TECHNIQUES.	Transfections
D016228	Endothelial Growth Factors	These growth factors are soluble mitogens secreted by a variety of organs. The factors are a mixture of two single chain polypeptides which have affinity to heparin. Their molecular weight are organ and species dependent. They have mitogenic and chemotactic effects and can stimulate endothelial cells to grow and synthesize DNA. The factors are related to both the basic and acidic FIBROBLAST GROWTH FACTORS but have different amino acid sequences.	Endothelial Cell-Derived Growth Factors,alpha-Endothelial Growth Factor,beta-Endothelial Growth Factor,ECDGF,Endo-GF,Endothelial Growth Factor,Endothelial Growth Factor Polypeptides,Endothelial Cell Derived Growth Factors,Growth Factor, Endothelial,Growth Factor, alpha-Endothelial,Growth Factor, beta-Endothelial,Growth Factors, Endothelial,alpha Endothelial Growth Factor,beta Endothelial Growth Factor
D016375	Antisense Elements (Genetics)	Nucleic acids which hybridize to complementary sequences in other target nucleic acids causing the function of the latter to be affected.	Antisense Probes,Anti-Sense Elements,Anti-Sense Probes,Anti Sense Elements,Anti Sense Probes,Elements, Anti-Sense,Probes, Anti-Sense,Probes, Antisense