It has been reported in animal experimental system that Platelet Aggregating Material (PAM) of cancer cell play important role in cancer metastasis. Many human cancer cell lines has been also studied the platelet aggregation activity of PAM. But correlation between the platelet aggregation activity and metastatic potential of human cancer cells were usually unkncwn. We established a human lung adenocarcinoma cell line KUM-LK-2 which produce spontaneous lung metastasis when cells implanted into subcutaneous of nude mice. PAM was extracted from KUM-LK-2 cells following the method of D.Mbhanty and P.Hilgard. Platelet aggregation study of PAM was performed by human Heparinized platelet rich plasma useing NIKO Hematracer PACT2D. Character of PAM were examined by physical and chemical treatment. KUM-LK-2 PAM shew 80% of platelet aggregation in maximum after 150 sec lag time, and aggregation was not found by Citrated PRP.It is concluded that PAM is high moleculer protein and contain Phospholipid and aggregation activity is concerning with ATP composition of platelet. PAM dose not contain Fibrinogen and Sialic acid, and not concern with Throrriboxan composition. This study is first case of platelet aggregation activity of PAM extracted human canoer cells which contain metastatic potential.
In vitro and in vivo studies on the inhibitory effects of myocardial cell culture medium on growth of a human lung adenocarcinoma cell line, A549
