It has been developed in this laboratory that a serum-free medium, designated asDMI,is adaptive for long-term culture,freezing and resurgence in liquid nitrogen,and cloningof hybridoma and parental myelomas as well as...It has been developed in this laboratory that a serum-free medium, designated asDMI,is adaptive for long-term culture,freezing and resurgence in liquid nitrogen,and cloningof hybridoma and parental myelomas as well as for cell fusions.In this report,it is describedthat the myeloma cells grown in DMI for more than 3 months maintained their biological charac-teristics such as induction of aseites and subcutaneous somatic tumor in BALB/c mice and toler-ance toward 8-azaguanine,ete..However,the ability of the tumor cells to attach to glass wallwas decreased.The selecting assay of these cells in HAT medium(medium containing hypoxan-thine,aminopterin and thymidine)showed that the death time in DMI was similar to that in theconventional 15％ newborn calf serum-supplemented medium(RPS15).The hybridoma cellsadapted in DMI secrete monoclonal antibodies in quantities comparable to those produced inRPS15.展开更多
Cholesterol,a major lipid component of plasma membrane,is thoughtto have profound effects on the structure and function of cells.Mostanimal tis-sues are capable of synthesizing cholesterol de novo from acetate;however...Cholesterol,a major lipid component of plasma membrane,is thoughtto have profound effects on the structure and function of cells.Mostanimal tis-sues are capable of synthesizing cholesterol de novo from acetate;however,thereare relatively few mammalian cells in vitro expressing an absolute requirement foran exogenous source of cholesterol.In this paper,it was shown that IR983F(983)rat myeloma cells and P3X63-AgS-U1(P3U1)and P3X63-Ag8.653(653)mousemy eloma cells which had been cultivated in serum-free medium for more than 6months required cholesterol in vitro for growth in serum-free medium.Optimalgrowth of P3U1,653 and 983 occurred in cholesterol concentration of 5,10 and15μg/ml,respectively.Moreover,it was demonstrated that the cholesterol couldbe replaced by human low density lipoprotein in a concentration of 10μg/ml butnot by mevalonic acid lactone.In contrast to the parental myeloma cells,hybridoma cells derived from the mouse myeloma cells which had been cultivatedin serum-free medium for more than 6 months did not require cholesterol.展开更多
基金Partially supported by grants from the National Natural Science Foundation of China(No.3880715)General Logistics Department of PLAand the President Foundation of the First Military Medical University
文摘It has been developed in this laboratory that a serum-free medium, designated asDMI,is adaptive for long-term culture,freezing and resurgence in liquid nitrogen,and cloningof hybridoma and parental myelomas as well as for cell fusions.In this report,it is describedthat the myeloma cells grown in DMI for more than 3 months maintained their biological charac-teristics such as induction of aseites and subcutaneous somatic tumor in BALB/c mice and toler-ance toward 8-azaguanine,ete..However,the ability of the tumor cells to attach to glass wallwas decreased.The selecting assay of these cells in HAT medium(medium containing hypoxan-thine,aminopterin and thymidine)showed that the death time in DMI was similar to that in theconventional 15％ newborn calf serum-supplemented medium(RPS15).The hybridoma cellsadapted in DMI secrete monoclonal antibodies in quantities comparable to those produced inRPS15.
基金This project was partially supported by National Natural Science Foundation of China No. 3880715General Logistics Department of PLA
文摘Cholesterol,a major lipid component of plasma membrane,is thoughtto have profound effects on the structure and function of cells.Mostanimal tis-sues are capable of synthesizing cholesterol de novo from acetate;however,thereare relatively few mammalian cells in vitro expressing an absolute requirement foran exogenous source of cholesterol.In this paper,it was shown that IR983F(983)rat myeloma cells and P3X63-AgS-U1(P3U1)and P3X63-Ag8.653(653)mousemy eloma cells which had been cultivated in serum-free medium for more than 6months required cholesterol in vitro for growth in serum-free medium.Optimalgrowth of P3U1,653 and 983 occurred in cholesterol concentration of 5,10 and15μg/ml,respectively.Moreover,it was demonstrated that the cholesterol couldbe replaced by human low density lipoprotein in a concentration of 10μg/ml butnot by mevalonic acid lactone.In contrast to the parental myeloma cells,hybridoma cells derived from the mouse myeloma cells which had been cultivatedin serum-free medium for more than 6 months did not require cholesterol.
