[Effect of total flaveos of Gymostemma pentaphyllum on protein expression of Fas/FasL genes and TNF-alpha concentration in cultured neonatal rat cardiomyocytes with hypoxia-reoxygenation].
OBJECTIVE
To study the effect of total flaveos of Gymostemma pentaphyllum on the protein expression of apoptosis-associated Fas/FasL gene and tumor necrosis factor-alpha (TNF-alpha) concentration in cultured neonatal rat cardiomyocytes with hypoxia-reoxygenation (H/R).


METHODS
A cultured primary neonatal rat cardiomyocytes model with H/R was erected, experiments were divided into six groups, (1)control group, (2)H/R group, (3)15 mg x L(-1) TFG plus H/R group, (4)45 mg x L(-1) TFG plus H/R group, (5) 105 mg x L(-1) TFG plus H/R group, (6)105 mg x L(-1) TFG group. TNF-aconcentration in cultured cardiomyocytes with H/R, was determined by ELISA method, the protein expression of Fas/FasL genes were estimated by immunohisto-chemistry.


RESULTS
After cardiomyocytes were made with H/R, Compared with control group, the positive expression index (PEI) of Fas/FasL proteins in cardiomyocytes increased significantly, Compared with H/R groups, the PEI of Fas/FasL proteins were lower significantly in groups with different dosages of TFG (P < 0.05). TFG inhibited the secretion of TNF-alpha from myocardial cells and increased the survival rate of myocardial cells.


CONCLUSIONS
The protein expression of apoptosis-associated Fas/FasL genes increased during H/R. The TFG can protect myocardium against H/R injury by decreasing the production of TNF-alpha, downregulating the protein expression of Fas/FasL genes, and then inhibiting myocyte apoptosis.
School of Pharmacy, Zhejiang University of Technology, Hangzhou 310014, China. lala-1856@126.com
Li
L
Le
Xiao-Li
XL
Gao
Bao-Xing
BX
Ding
Bin-Xiang
BX
Yuan
D000818:Animals; D000831:Animals, Newborn; D017209:Apoptosis / Q000187:drug effects; D015687:Cell Hypoxia; D002478:Cells, Cultured; D004365:Drugs, Chinese Herbal / Q000302:isolation & purification / Q000494:pharmacology; D004797:Enzyme-Linked Immunosorbent Assay; D053222:Fas Ligand Protein / Q000378:metabolism*; D047309:Flavones / Q000302:isolation & purification / Q000494:pharmacology*; D029774:Gynostemma / Q000737:chemistry*; D007150:Immunohistochemistry; D032383:Myocytes, Cardiac / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D010101:Oxygen Consumption / Q000187:drug effects / Q000502:physiology; D010946:Plants, Medicinal / Q000737:chemistry; D051381:Rats; D017207:Rats, Sprague-Dawley; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism*
D004365:Drugs, Chinese Herbal; D053222:Fas Ligand Protein; D047309:Flavones; D014409:Tumor Necrosis Factor-alpha