Document Detail

Effects of eukaryotic expression plasmid encoding human tumstatin gene on endothelial cells in vitro.
MedLine Citation:
PMID:  20819678     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Tumstatin is a novel endogenous angiogenesis inhibitor which is widely studied using purified protein. The current study evaluates the antiangiogenic effects of tumstatin-overexpression plasmid in vitro, reveals the mechanism underlying the vascular endothelial cell growth inhibition and searches for a novel method administering tumstatin persistently.
METHODS: The eukaryotic expression plasmid pcDNA-tumstatin encoding tumstatin gene was constructed and transfected to human umbilical vein endothelial cell ECV304 and human renal carcinoma cell ACHN. Expression of tumstatin in the two cell lines was determined by RT-PCR and Western blotting. Vascular endothelial cell proliferation was assessed by CCK-8 assay and cell cycle was analyzed by flow cytometry. To investigate the mechanism by which pcDNA-tumstatin inhibited vascular endothelial cell proliferation in vitro, cyclin D1 protein was detected by Western blotting.
RESULTS: DNA sequence confirmed that pcDNA-tumstatin was successfully constructed. RT-PCR and Western blotting indicated that tumstatin could express in the two cell lines effectively. After tumstatin gene transfer, ECV304 cell growth was significantly inhibited and the cell cycle was arrested in G1 phase. And Western blotting showed that pcDNA-tumstatin decreased the level of cyclin D1 protein.
CONCLUSIONS: Overexpression of tumstatin mediated by pcDNA 3.1 (+) specially inhibited vascular endothelial cells by arresting vascular endothelial cell in G1 phase resulting from downregulation of cyclin D1 and administration of tumstatin using a gene therapy might be a novel strategy for cancer therapy.
Ya-pei Yang; Chun-xiao Xu; Guo-sheng Hou; Jia-xuan Xin; Wei Wang; Xian-xi Liu
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Chinese medical journal     Volume:  123     ISSN:  0366-6999     ISO Abbreviation:  Chin. Med. J.     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-09-07     Completed Date:  2010-12-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7513795     Medline TA:  Chin Med J (Engl)     Country:  China    
Other Details:
Languages:  eng     Pagination:  2269-73     Citation Subset:  IM    
Institute of Biochemistry and Molecular Biology, School of Medicine, Shandong University, Jinan, Shandong 250012, China.
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MeSH Terms
Autoantigens / genetics*,  metabolism*
Blotting, Western
Cell Cycle / genetics,  physiology
Cell Line
Cell Line, Tumor
Cell Proliferation
Collagen Type IV / genetics*,  metabolism*
Endothelial Cells / cytology*,  metabolism*
Flow Cytometry
Plasmids / genetics
Reverse Transcriptase Polymerase Chain Reaction
Reg. No./Substance:
0/Autoantigens; 0/Collagen Type IV; 0/type IV collagen alpha3 chain

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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