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- W1999550851 abstract "Treatment of serum-free grown HL60 cells with certain combined amounts of retinoic acid (9-cis or all-trans RA) and 1 alpha 25 dihydroxyvitamin D3 (D3) results in differentiation of 71-77% of cells towards either neutrophils or monocytes. Studies of the differentiation of HL60 cells in flask cultures does not reveal: (i) the extent to which selective growth of cells might have occurred; and (ii) the overall level of cell survival. This information can be obtained by monitoring the effects of differentiative agents on individual cells. Serum-free grown HL60 cells were cultured as single cells in microtitre wells in conditioned medium obtained from exponentially growing and serum-free cultures of HL60. This resulted in a cloning efficiency of 85% and HL60 cells doubled every 24 h. During a period of exponential growth < 0.5 to 2% of the cells generated died. Single HL60 cells were treated with 9-cis and all-trans RA (5 x 10(-7) M) together with a small amount of D3 (3.9 x 10(-14) M) to promote neutrophil differentiation. D3 alone (10(-7) M) and D3 (5 x 10(-9) M) in combination with 9-cis RA (10(-8) M) were used to promote monocyte differentiation. The growth kinetics of HL60 cell cultures that were differentiating to neutrophils and to monocytes were similar. Single-cell experiments have revealed that: (i) differentiating HL60 cells undergo a variable number of divisions (two to five) prior to arresting their growth; and (ii) up to 33% of the cells that are generated (by day 5) die. Seventy to eighty per cent of the cells in each of the wells had matured. These findings have important implications in regard to whether retinoids and D3 provide signals that determine the choice of maturation pathway or that merely facilitate selective survival and/or expansion of cells that have independently determined their differentiation fates." @default.
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- W1999550851 date "1996-10-01" @default.
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- W1999550851 title "Growth of single HL60 cells in liquid culture: Analysis of the influences of differentiative agents" @default.
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- W1999550851 doi "https://doi.org/10.1016/s0145-2126(96)00040-9" @default.
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