title: [Low-dose nonylphenol promotes the proliferation of DU-145 cells and expression of membrane estrogen receptor GPR30 in DU-145 cells].
abstract: OBJECTIVE
  To observe the effects of low-dose exogenous estrogen nonylphenol (NP) on the proliferation of human prostate cancer cell lines DU-145 and the expression of the membrane estrogen receptor GPR30 in the DU-145 cells.
  
  
  METHODS
  We exposed DU-145 cells to different concentrations of NP for 24 hours, followed by measurement of the half maximal inhibitory concentration (IC50) of the cells by cell proliferation assay and determination of the concentration of exposure to low-dose NP. We also observed the expressions of 3 estrogen receptors (ER), including ER-alpha, ER-beta and membrane estrogen receptor GPR30, in the DU-145 cells exposed to low-dose NP by RT-PCR.
  
  
  RESULTS
  Cell proliferation assay showed that within a certain range of doses, NP inhibited the proliferation of the DU-145 cells with an IC50 of 46 micromol/L, a much lower dose of NP than IC50, 0.01, 0.1.1 micromol/l NP, that can promote the proliferation of DU-145 cells. The results of RT-PCR indicated that the expressions of the three ERs in the DU-145 cells were similar to those in prostate epithelial cells, and that low-dose NP promoted the expression of GPR30.
  
  
  CONCLUSIONS
  Membrane estrogen receptor GPR30 may play a role in low-dose NP promoting the proliferation of DU-145 cells.
authors.forename: Wei-Dong
authors.initials: WD
authors.lastname: Gan
authors.forename: Ming
authors.initials: M
authors.lastname: Zhou
authors.forename: Yang
authors.initials: Y
authors.lastname: Hu
authors.forename: Dong-Mei
authors.initials: DM
authors.lastname: Li
authors.forename: Rui-Peng
authors.initials: RP
authors.lastname: Jia
mesh_terms: D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects* / Q000502:physiology; D047628:Estrogen Receptor alpha / Q000378:metabolism; D047629:Estrogen Receptor beta / Q000378:metabolism; D004967:Estrogens; D006801:Humans; D008297:Male; D010636:Phenols / Q000008:administration & dosage / Q000494:pharmacology*; D011471:Prostatic Neoplasms / Q000378:metabolism / Q000473:pathology*; D011960:Receptors, Estrogen / Q000378:metabolism*; D043562:Receptors, G-Protein-Coupled / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D047628:Estrogen Receptor alpha; D047629:Estrogen Receptor beta; D004967:Estrogens; C109584:GPER1 protein, human; D010636:Phenols; D011960:Receptors, Estrogen; D043562:Receptors, G-Protein-Coupled; C025256:nonylphenol