Integrins Mediating Adhesion and Proliferation of ADP-stimulated Vascular Smooth Muscle Cells
Korean Circulation Journal
;
: 409-419, 2003.
Article
in Korean
| WPRIM
| ID: wpr-49602
ABSTRACT
BACKGROUND AND OBJECTIVES:
Adenosine diphosphate (ADP), which is usually secreted from activated platelets, may activate integrins on vascular smooth muscle cells, resulting in adhesion and proliferation. Integrins, mediating the ADP-stimulated adhesion and proliferation of vascular smooth muscle cells, was investigated in this study. MATERIALS ANDMETHODS:
Prothrombin (PT) and bone sialoprotein (BSP) were used as activation-dependent ligands in an adhesion assay. The adhesion of human aortic smooth muscle cells (HASMC) were measured after ADP stimulation, using ligand-coated 24-well plates. The 3-[4, 5-dimethylthiazol-2-yl]-2, 5-diphenyltetrazolium bromide (MTT) assay was used to evaluate the ADP-stimulated proliferation of the HASMC.RESULTS:
ADP activated the HASMC to increase their adhesion to the PT or BSP, and their proliferation in a dose-dependent manner. The adhesion of the ADP-stimulated HASMC to the PT was completely blocked by P5H9, a blocking monoclonal Ab (mAb) to integrin alphavbeta5 (92% inhibition), but was only slightly inhibited by LM609, a blocking mAb to integrin alphavbeta3 (30% inhibition). The adhesion of the ADP-stimulated HASMC to the BSP was partially inhibited by both P5H9 (46% inhibition) and JBS5, a blocking mAb to integrin alpha5beta1 (75% inhibition), but was not affected by c7E3, a blocking mAb to integrin beta3. The ADP-stimulated proliferation of the HASMC was inhibited by both c7E3 and LM609 (98% and 93% inhibition, respectively), but not by either P1F5, a blocking mAb to integrin alphavbeta5 or JBS5.CONCLUSION:
These results indicate the different roles of integrins on vascular smooth muscle cells after ADP stimulation; the integrins alphavbeta5 and alpha5beta1 for adhesion, and the integrin alphavbeta3 for proliferation.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Prothrombin
/
Integrins
/
Adenosine Diphosphate
/
Negotiating
/
Myocytes, Smooth Muscle
/
Integrin alpha5beta1
/
Integrin alphaVbeta3
/
Integrin beta3
/
Integrin-Binding Sialoprotein
/
Ligands
Limits:
Humans
Language:
Korean
Journal:
Korean Circulation Journal
Year:
2003
Type:
Article
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