[Damage effect of hepatocytic growth-promoting substance from neonatal calf on DNA of HL-60 cells].
The present study was aimed to investigate the damage effect of hepatocyte growrh promoting substance (HGS) on the HL-60 cell DNA in vitro and to explore the possible mechanism underlying the effect. Experiment was divided into 3 groups: one was control group, in which 0.9% NaCl solution was added, and other two were experimental group 1 and group 2, where 22.5 microg/ml and 40 microg/ml HGS were added, respectively. HL-60 cell growths were compared between groups with and without HGS. Single cell gel electrophoresis (SCGE) was used to detect DNA damage of HL-60 cell. DNA electrophoresis was used to detect the apoptosis of HL-60 cells caused by HGS. The results showed that the inhibitory effects of HGS on growth of HL-60 cells were observed in group with 22.5 microg/ml and group with 40 microg/ml after culture for 2 days, the DNA ladder and the apoptosis of HL-60 cells occurred in these 2 groups on day 2 after addition of HGS, the counts of HL-60 cells with comet tail in these experimental groups were found to be more increased in comparison with control group. In conclusion, the HGS can inhibit the growth of HL-60 cell and the apoptosis of HL-60 cells should be induced through pathway of DNA damage caused by HGS.
Department of Gerontological Hematology, General Hospital of PLA, Beijing 100853, China.
Hong-Li
HL
Zhu
Xue-Chun
XC
Lu
Hui
H
Fan
Hong
H
Xin
Xiao-Meng
XM
Zhuang
Yang
Y
Yang
Shan-Qian
SQ
Yao
D000818:Animals; D000831:Animals, Newborn; D017209:Apoptosis / Q000187:drug effects* / Q000235:genetics; D002417:Cattle; D049109:Cell Proliferation / Q000187:drug effects; D020552:Comet Assay; D004249:DNA Damage; D004273:DNA, Neoplasm / Q000032:analysis / Q000235:genetics; D018922:HL-60 Cells; D006801:Humans; D036341:Intercellular Signaling Peptides and Proteins; D010455:Peptides / Q000494:pharmacology*
D004273:DNA, Neoplasm; D036341:Intercellular Signaling Peptides and Proteins; D010455:Peptides; C073456:hepatic stimulator substance