title: [Study on estrogen receptors alpha and beta in the hippocampus of premenstrual syndrome model rats of gan-qi depression syndrome].
abstract: OBJECTIVE
  To study the distribution pattern, the protein expressions, and changes of functional activities of estrogen receptor (ER) alpha and beta in the hippocampus of premenstrual syndrome (PMS) rats of Gan-qi depression syndrome (GDS), and to find out corresponding effect targets of Jingqianshu Granule (JG), thus providing clues for exploring the pathogenesis of PMS of GDS and the mechanisms of JG.
  
  
  METHODS
  SD rats were randomly divided into three groups, i. e., the normal group, the model group, and the medication group, 7 in each. Resident intruder stress was used to establish the model in the model group and the medication group. JG was given to rats in the medication group at the dose of 10 mL/kg by gastrogavage while modeling. Equal volume of sterilized water was given to rats in the model group and the normal group, once daily, for 5 successive days. Then the location, protein levels, and ligand-binding capacities of ERalpha and ERbeta in the hippocampus of rats in three groups were detected using immunohistochemical assay, Western blot, and dextran-active carbon binding assay.
  
  
  RESULTS
  There was no difference in the distribution pattern of ERalpha and ERbeta in the hippocampus of the three groups. In aspects of protein levels and estrogen-binding capacities of ERalpha and ERbeta in the hippocampus, CA1 and CA3 regions, they increased more obviously in the model group than in the normal group (P < 0.05), while they decreased more significantly in the medication group than in the model group (P < 0.05).
  
  
  CONCLUSIONS
  Higher estrogen levels and enhanced expressions and activities of ERalpha and ERbeta in the hippocampus might be important mechanisms for PMS of GDS, which might also be the effect targets for JG.
authors.affiliation: School of Basic Medicine, Shandong University of Traditional Chinese Medicine, Jinan.
authors.forename: Jie
authors.initials: J
authors.lastname: Gao
authors.forename: Chun-hong
authors.initials: CH
authors.lastname: Song
authors.forename: Kai-yong
authors.initials: KY
authors.lastname: Xu
mesh_terms: D000818:Animals; D004195:Disease Models, Animal; D004365:Drugs, Chinese Herbal / Q000627:therapeutic use; D047628:Estrogen Receptor alpha / Q000378:metabolism*; D047629:Estrogen Receptor beta / Q000378:metabolism*; D005260:Female; D006624:Hippocampus / Q000378:metabolism*; D008516:Medicine, Chinese Traditional; D011293:Premenstrual Syndrome / Q000175:diagnosis / Q000188:drug therapy / Q000378:metabolism*; D019413:Qi; D051381:Rats
chemical_list: D004365:Drugs, Chinese Herbal; D047628:Estrogen Receptor alpha; D047629:Estrogen Receptor beta