摘要
ＳＥＭｏｂｓｅｒｖａｔｉｏｎｏｎＬＡＫｃｅｌｌｓｋｉｌｌｉｎｇｔｈｅｈｕｍａｎｒｅｃｔａｌａｄｅｎｏｃａｒｃｉｎｏｍａｃｅｌｌｓｉｎｖｉｔｒｏＤｉｎｇＹａｎｑｉｎｇ（丁彦青）；ＬｉＣｈｕｎｄｅ（李春德）；ＺｈａｎｇＪｉｕｈｕａ（张进华）；ｚｈｕＭｅｉ...
Morphological changes of lymphokine activated killer (LAK) cells and human rectal adenocarcinoma (HR8348) cells were observed under scanning electron microscope (SEM) during the interaction of the two kinds of the cells in vitro. It was showed that the effector and target cells could actively and chemotactically move toward each other. LAK and HR8348 cells contacted with each other through cellular projections and microvilli. The LAK cells simply attached to the HR8348 cells at the early stagr, followed by jigsaw-like binding with them. After conjunction, the target cells' membrane appeared to blister and became perforated. The conjunction of microvilli and projection may act as a physical microbridge in the lysis of the target cells, and killing factors may mediate the lysis by the microbridge. 'Closed chamber' was formed between the conjunctive microvilli, which may play an important role in maintaining local concentration of the killing substances.
