[Up-regulation of transcription factors NF-E2, c-jun and c-fos of AP-1 family induced by Panax Notoginosides in hematopoietic cells].
To observe the effects of Panax Notoginosides (PNS) on up-regulation of AP-1 family transcription factors NF-E2, c-jun and c-fos for exploring intracellular signal pathway of PNS in hematopoietic cells, four human hematopoietic cells lines including myeloid HL-60, erythroid K562, megakaryoid CHRF-288 and Meg-01 were incubated in the presence of PNS for 14 days. The nuclear protein of cells were extracted and analyzed by Western blot with antibodies against NF-E2, c-fos and c-jun. Electrophoretic mobility shift assay (EMSA) was performed by using (32)P labeled AP-1 consensus oligonucleotide which contains binding site for NF-E2, c-jun and c-fos. The results showed that the transcription factors NF-E2, c-jun and c-fos of AP-1 family could be induced by PNS. Western blot demonstrated that the nuclear protein of both NF-E2 and c-jun in four cell lines treated by PNS were increased by 1.5-2.5- and 2.0-3.0-fold over untreated cells respectively. The c-fos protein in three cell lines of K562, CHRF-288 and Meg-01 was also elevated by 2.0-3.0-fold respectively, while c-fos protein in HL-60 cells was no detectable difference after PNS treatment. EMSA results in four cell lines indicated that AP-1 binding activity initiated by PNS was apparently elevated to form higher density band of AP-1-DNA complex. In conclusion, the intracellular transcription regulation initiated by PNS was involved in transcription factors NF-E2, c-jun and c-fos of AP-1 family members, which could play an important role in the up-regulation of genes expression related to proliferation and differentiation of hematopoietic cells.
Gao
Rui-Lan
RL
Affiliated Hospital, Zhejiang College of Traditional Chinese Medicine, Hangzhou 310006, China. zphtcmcn@mail.hz.zj.cn
Xu
Wei-Hong
WH
Chen
Xiao-Hong
XH
Qian
Xu-Dai
XD
Wu
Chao-Qun
CQ
D004247:DNA / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000235:genetics*; D050981:Erythroid-Specific DNA-Binding Factors; D005786:Gene Expression Regulation / Q000187:drug effects*; D016762:Genes, fos; D016758:Genes, jun; D036145:Ginsenosides / Q000494:pharmacology*; D018922:HL-60 Cells; D006801:Humans; D020014:K562 Cells; D050983:NF-E2 Transcription Factor; D050984:NF-E2 Transcription Factor, p45 Subunit; D005894:Panax; D018808:Transcription Factor AP-1 / Q000378:metabolism*; D014157:Transcription Factors / Q000235:genetics*; D015854:Up-Regulation
D004268:DNA-Binding Proteins; D050981:Erythroid-Specific DNA-Binding Factors; D036145:Ginsenosides; D050983:NF-E2 Transcription Factor; D050984:NF-E2 Transcription Factor, p45 Subunit; C494692:NFE2 protein, human; D018808:Transcription Factor AP-1; D014157:Transcription Factors; D004247:DNA; C072936:notoginsenoside R1