Adhesive properties of hepatoma cells to collagen IV coated surfaces.
OBJECTIVE
To quantitatively study the adhesive properties of hepatoma cells to collagen IV coated artificial basement membrane and to investigate the relevance of cell adhesive forces to the concentration of collagen IV.


METHODS
Synchronous G1 and S phase cells were achieved using thymine-2-desoxyriboside and cochicine sequential blockage method and double thymine-2-desoxyriboside blockage method respectively. The adhesive forces of hepatoma cells were investigated by micropipette aspiration technique.


RESULTS
The adhesive forces of hepatoma cells to artificial basement membrane were (107.78+/-65.44)x10(-10)N, (182.60+/-107.88)x10(-10)N, (298.91+/-144.13)x10(-10)N when the concentration of the membrane coated by 1, 2, 5 microg/ml collagen IV respectively (P<0.001). The adhesive forces of G1 and S phases hepatoma cells to artificial basement membrane were (275.86+/-232.80)x10(-10)N and (161.16+/-120.40)x10(-10)N respectively when the concentration of the membrane coated by 5 microg/ml collagen IV (P<0.001).


CONCLUSIONS
The adhesive forces of hepatoma cells to artificial basement membrane in direct proportion to the concentration of collagen IV suggests that the increase of basement membrane might be conducive to the chemotactic motion and adhesiveness of tumor cells. G1 phase cells are more capable of adhering to basement membrane than S phase cells. Hepatoma cells, especially G1 phase cells, may survive in blood circulation, and sequest and adhere in microcirculation, and get through basement membrane for remote metastasis.
Zhao
Ting
T
Department of Surgery, Zhejiang Provincial Hospital, Hangzhou 310014, China.
Ling
Zhi-Qiang
ZQ
Yu
Wei-Qun
WQ
Long
Mian
M
Cai
Shao-Xi
SX
D000818:Animals; D001485:Basement Membrane; D006528:Carcinoma, Hepatocellular / Q000473:pathology / Q000503:physiopathology*; D002448:Cell Adhesion; D002453:Cell Cycle; D020099:Coated Materials, Biocompatible; D024141:Collagen Type IV; D016193:G1 Phase; D008113:Liver Neoplasms / Q000473:pathology / Q000503:physiopathology*; D008567:Membranes, Artificial; D009994:Osmolar Concentration; D051381:Rats; D016196:S Phase; D013997:Time Factors; D014407:Tumor Cells, Cultured
D020099:Coated Materials, Biocompatible; D024141:Collagen Type IV; D008567:Membranes, Artificial