TY - JOUR
T1 - Effects of glucocorticoids on nucleic acid synthesis in mouse lymphoma cells growing in vitro and on nuclei isolated from these cells
AU - Gomez, Juanita
AU - Kemper, Byron W.
AU - Pratt, William B.
AU - Aronow, Lewis
PY - 1970/4
Y1 - 1970/4
N2 - Mouse lymphoma 388 cells, growing in vitro, are inhibited in their growth rate by glucocorticoids. Studies with whole cells incorporating thymidine into DNA, uridine into RNA and leucine into protein suggested an early (12 hr) depression of thymidine incorporation, with less effect on uridine or leucine. DNA and RNA polymerase activities in these cells were studied more directly by examining a broken cell system. Washed nuclei isolated from ML-388 cells incorporate nucleoside and deoxynucleoside triphosphates into RNA and DNA. Using a washed nuclear system, we have shown that glucocorticoids have no direct effect on either RNA or DNA polymerase activity. Nuclei taken from cells exposed to glucocorticoids for 12 or 24 hr show no consistent differences when compared to control preparations with respect to their ability to synthesize DNA. RNA synthesis is depressed about 30 per cent in nuclei taken from steroid-treated cells.
AB - Mouse lymphoma 388 cells, growing in vitro, are inhibited in their growth rate by glucocorticoids. Studies with whole cells incorporating thymidine into DNA, uridine into RNA and leucine into protein suggested an early (12 hr) depression of thymidine incorporation, with less effect on uridine or leucine. DNA and RNA polymerase activities in these cells were studied more directly by examining a broken cell system. Washed nuclei isolated from ML-388 cells incorporate nucleoside and deoxynucleoside triphosphates into RNA and DNA. Using a washed nuclear system, we have shown that glucocorticoids have no direct effect on either RNA or DNA polymerase activity. Nuclei taken from cells exposed to glucocorticoids for 12 or 24 hr show no consistent differences when compared to control preparations with respect to their ability to synthesize DNA. RNA synthesis is depressed about 30 per cent in nuclei taken from steroid-treated cells.
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U2 - 10.1016/0006-2952(70)90063-8
DO - 10.1016/0006-2952(70)90063-8
M3 - Article
C2 - 5535184
AN - SCOPUS:0014771602
VL - 19
SP - 1471
EP - 1483
JO - Biochemical Pharmacology
JF - Biochemical Pharmacology
SN - 0006-2952
IS - 4
ER -