title: Thalidomide inhibits leukemia cell invasion and migration by upregulation of early growth response gene 1.
abstract: Thalidomide has been shown to exert its antitumor activity through the significant effects on microenvironment and immunomodulatory properties. In this study, 10 microM thalidomide treatment markedly increased the expression of the early growth response gene 1 (Egr-1) at both mRNA and protein levels in HL-60 leukemic cells. Thalidomide treatment significantly decreased the invasive cells number through Matrigel and human umbilical vein endothelial cells when compared with the controls. Moreover, the inhibitory effects could be markedly abolished by Egr-1 gene silencing with siRNA technology. Our data indicated thalidomide could suppress leukemia cell invasion and migration by upregulation of Egr-1, suggesting a novel mechanism of thalidomide in the treatment of leukemia. Further investigations are needed to explore the detailed mechanism of Egr-1 induction by thalidomide and the downstream pathways involved in the regulation of leukemia cell invasion.
authors.affiliation: Department of Hematology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, PR China. liupeng8888@yahoo.com.cn
authors.forename: Peng
authors.initials: P
authors.lastname: Liu
authors.forename: Jianyong
authors.initials: J
authors.lastname: Li
authors.forename: Hua
authors.initials: H
authors.lastname: Lu
authors.forename: Bei
authors.initials: B
authors.lastname: Xu
mesh_terms: D002465:Cell Movement / Q000187:drug effects*; D051766:Early Growth Response Protein 1 / Q000235:genetics / Q000378:metabolism*; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects* / Q000235:genetics; D018922:HL-60 Cells; D006801:Humans; D007938:Leukemia / Q000235:genetics / Q000378:metabolism* / Q000473:pathology*; D009361:Neoplasm Invasiveness / Q000473:pathology; D034741:RNA, Small Interfering / Q000235:genetics; D013792:Thalidomide / Q000494:pharmacology*; D015854:Up-Regulation / Q000187:drug effects* / Q000235:genetics
chemical_list: C497325:EGR1 protein, human; D051766:Early Growth Response Protein 1; D034741:RNA, Small Interfering; D013792:Thalidomide