[Effect of TTRAP expression on apoptosis induced by hydroquinone in HL-60 cells in vitro.].
OBJECTIVE
To study the effect of TTRAP expression on apoptosis induced by hydroquinone in HL-60 cells in vitro, and explore the relationship between TTRAP expression and the apoptosis.


METHODS
Apoptotic and necrotic rate was examined by flow cytometer with Anti-AnnexinV/FITC Plus PI staining. The mRNA expression of TTRAP was detected by RT-PCR. The differences in different treated groups were compared.


RESULTS
After different concentrations of hydroquinone to the cells for 0, 4, 8, 12 h culture, were added, the cell apoptotic rate in different concentrations of hydroquinone groups was significantly higher than that in blank control groups. The optimal concentration of hydroquinone was 200 micromol/L, lasting for 8 h. When it was 250 micromol/L, the necrotic rate increased significantly. The apoptosis induced by hydroquinone was associated with the culture time at the concentration of 200 micromol/L, and the peak apoptotic time was 8 h. Then the apoptotic rate decreased and necrotic rate increased. Furthermore, with the concentrations of hydroquinone increased and time lasted for 8 h, the apoptotic rate of cells increased, the amount of TTRAP expression in the mRNA level also increased accordingly. When the concentrations of hydroquinone was above 250 micromol/L, necrotic rate increased sharply, and the amount of TTRAP expression decreased.


CONCLUSIONS
Hydroquinone could induce apoptosis of HL-60 cells. The up-regulation of TTRAP expression may promote hydroquinone to induce HL-60 cells to go into apoptosis in vitro with dose-effect and time-effect relationship.
Zhang
Zheng-Bin
ZB
Department of Occupational and Environmental Health, School of Public Health, Wuhan University, Wuhan 430071, China.
Hu
Jing
J
Bi
Yong-Yi
YY
Zhao
Zhi-Wei
ZW
Tao
Ning
N
Yan
Hong
H
Zhu
Zhong-Ling
ZL
Liu
Yang-Ming
YM
Li
Li
L
D017209:Apoptosis / Q000187:drug effects; D005434:Flow Cytometry; D018922:HL-60 Cells; D006801:Humans; D006873:Hydroquinones / Q000494:pharmacology; D015854:Up-Regulation
D006873:Hydroquinones