ESTABLISHMENT OF A MODEL OF TRANSPLANTABLE MYELOCYTIC LEUKEMIA (L_(801)) IN LACA MICE

A transplantable myelocytic leukemia model of LACA mice, designated by the name of L_(801), was established by intravenous injection of spleen cell suspension from mice with radiation-induced myclocytic leukemia into mice of the same strain.Until now, for more than three years, the L_(801) has maintained stable and rapid growth and has been reproduced for over 130 serial passages. The incidence of leukemia in inoculated animals was approximately 100% and mean survival time was 10.9±2.1 days. The L_(801) is of myelocytic type which has been determined by cytological, cytochemical, pathological and ultrastructural observations. Its karyotype was hypodiploid, characterized by modal number of 39, loss of Y chromosome and an abnormal huge marker chromosome. The cell cycle duration of the L_(801) was 16 h. C-type viral particles were observed under the electron-microscope. The L_(801) was sensitive, to varying extents, to various anti-tumor agents.We presume that the L_(801) is a useful tool in studies on me     

ESTABLISHMENT AND BIOLOGICAL PROPERTIES OF MOUSE GRANULOCYTIC LEUKEMIC CELL LINE-L_(833)

A granulocytic Leukemic cell line, called L_(833), has been established through culturing in vitro frommouse bone marrow of transplantable granulocytic leukemia. More than 280 passages have been performedin 3 years. Cell growth has been rapid and stable. Incidence of tumour formation was 100% with variousroutes of inoculation. The nature of granulocytic leukemia was confirmed by examination of cytology,cytochemistry, pathology and ultrastructural changes. Analysis proved chromosomes to be hypodiploid with model number of 39, loss of chromosomes, andpresence of a marker. Besides the chromosomal change as mentioned above, both L_(883-A) and L_(833-B)derived from colonies formed from the L_(833) cells cultuerd in semi-solid agar medium, have their ownmarker. The cell line was sensitive to various types of antitumour agents in varying degrees. It was alsosensitive to ionizing radiation. D_0 values of L_(833) and L_(833-A) cells were 98.8 and 104.9 rad, respec-tively. The results were similar to that of L_(8     

一些含TMCPDA抗癌铂配合物的研究

本文根据大量的抗癌铂配合物的构效关系研究结果,合成及表征了八种含TMCPDA的新铂配合物(TMCPDA=1,2,2’—三甲基—1,3—环戊二胺),测定了八种配合物对小鼠淋巴白血病L—1210及S—180肉瘤的抑制作用,并研究了配合物的电子结构。结果指出,该系列的配合物有较高的抗癌活性,特别是[Pt(TMCPDA)(Ac—Cl)_2]配合物对L—1210及S—180的抑制作用在此系列配合物中尤为突出。经进一步的临床前的药理研究表明,该配合物的活性较高、毒性较低。配合物的电子结构与抗癌活性的关系的研究结果与以前所得到的抗癌铂配合物的构效关系较一致,表明配合物的电子结构确实与其抗癌活性密切相关。