Dual effect of heparin and low molecular weight heparin on cultured smooth muscle cells.
The effects of heparin and low molecular weight heparin (LMWH) on the growth of cultured human aortic smooth muscle cells (hASMCs) were studied. The fourth-passage hASMCs were planted onto a 24-well plate (5 wells for each concentration of heparin or LMWH) and cultured by DMEM containing 5% either old or fresh human serum (HS), 10% fetal calf serum (FCS), and differing concentrations of heparin or LMWH (heparin and LMWH were presented as hexuronic acid) together with corresponding control groups (without heparin or LMWH) for 24h. hASMCs growth was estimated both morphologically and by 3H-TdR incorporation. The results revealed that both heparin and LMWH inhibited the proliferation of healthy growth hASMCs, but promoted the proliferation of weak growth hASMCs. These results suggest for the first time that heparin and LMWH have a dual regulative role (inhibition and promotion) in hASMCs growth and indicate that they may play an important role in controlling the proliferation of vascular smooth muscle cells and maintaining the integrity of vascular structure.
Division of Biochemistry, Cardiovascular Institute and Fu Wai Hospital, CAMS and PUMC, Beijing, PR China.
X F
XF
Cong
X W
XW
Liu
Y
Y
Peng
Y S
YS
Chang
D001011:Aorta / Q000166:cytology / Q000378:metabolism; D002455:Cell Division / Q000187:drug effects; D002478:Cells, Cultured; D004247:DNA / Q000037:antagonists & inhibitors; D004305:Dose-Response Relationship, Drug; D006493:Heparin / Q000494:pharmacology*; D006495:Heparin, Low-Molecular-Weight / Q000494:pharmacology*; D006801:Humans; D009131:Muscle, Smooth, Vascular / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D009994:Osmolar Concentration; D012016:Reference Values; D016196:S Phase / Q000187:drug effects
D006495:Heparin, Low-Molecular-Weight; D006493:Heparin; D004247:DNA