title: Cyclic changes in expression of mRNA of vascular endothelial growth factor, its receptors Flt-1 and KDR/Flk-1, and Ets-1 in human corpora lutea.
abstract: OBJECTIVE
  To evaluate the expression of mRNA of vascular endothelial growth factor (VEGF), its receptors Flt-1 and KDR/Flk-1, and Ets-1 in human corpora lutea.
  
  
  METHODS
  Prospective laboratory study.
  
  
  METHODS
  University hospital in Japan.
  
  
  METHODS
  Women with regular menstrual cycles who underwent hysterectomy.
  
  
  METHODS
  Fifteen corpora lutea were obtained during hysterectomy (5 in the early luteal phase, 5 in the mid-luteal phase, and 5 in the late luteal phase).
  
  
  METHODS
  Expression of VEGF, Flt-1, KDR/Flk-1, and Ets-1 in human corpora lutea on northern blot analysis or immunohistochemistry.
  
  
  RESULTS
  Human corpora lutea in early luteal phase and mid-luteal phase had high VEGF mRNA expression. Expression of VEGF mRNA was significantly reduced in the late luteal phase. Immunohistochemistry showed that VEGF protein was expressed mainly in granulosa lutein cells and faintly in thecal lutein cells. Staining of VEGF protein was decreased in human corpora lutea in the late luteal phase. Expression of Flt-1 and KDR/Flk-1 mRNA was increased in the early luteal phase and mid-luteal phase and decreased in the late luteal phase. Immunohistochemistry showed that Flt-1 and KDR/Flk-1 proteins were expressed mainly in granulosa lutein cells and faintly in thecal lutein cells and endothelial cells in the early luteal phase and mid-luteal phase; their protein staining was reduced in the late luteal phase. Expression of Ets-1 mRNA changed similarly to VEGF and its receptor mRNA in human corpora lutea during the luteal phase.
  
  
  CONCLUSIONS
  Levels of mRNA of VEGF and its receptors Flt-1 and KDR/Flk-1 in human luteal cells may be related to luteal function.
authors.affiliation: Department of Obstetrics and Gynecology, Sapporo Medical University School of Medicine, Sapporo, Japan. endot@sapmed.ac.jp
authors.forename: T
authors.initials: T
authors.lastname: Endo
authors.forename: Y
authors.initials: Y
authors.lastname: Kitajima
authors.forename: A
authors.initials: A
authors.lastname: Nishikawa
authors.forename: K
authors.initials: K
authors.lastname: Manase
authors.forename: M
authors.initials: M
authors.lastname: Shibuya
authors.forename: R
authors.initials: R
authors.lastname: Kudo
mesh_terms: D015152:Blotting, Northern; D003338:Corpus Luteum / Q000378:metabolism*; D016228:Endothelial Growth Factors / Q000235:genetics* / Q000378:metabolism; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008222:Lymphokines / Q000235:genetics* / Q000378:metabolism; D008597:Menstrual Cycle / Q000502:physiology*; D011446:Prospective Studies; D050784:Proto-Oncogene Protein c-ets-1; D011518:Proto-Oncogene Proteins / Q000235:genetics* / Q000378:metabolism; D050783:Proto-Oncogene Proteins c-ets; D012333:RNA, Messenger / Q000378:metabolism*; D020794:Receptor Protein-Tyrosine Kinases / Q000235:genetics* / Q000378:metabolism; D017978:Receptors, Growth Factor / Q000235:genetics* / Q000378:metabolism; D040262:Receptors, Vascular Endothelial Growth Factor; D014157:Transcription Factors / Q000235:genetics*; D042461:Vascular Endothelial Growth Factor A; D040281:Vascular Endothelial Growth Factor Receptor-1; D042442:Vascular Endothelial Growth Factors
chemical_list: C494041:ETS1 protein, human; D016228:Endothelial Growth Factors; D008222:Lymphokines; D050784:Proto-Oncogene Protein c-ets-1; D011518:Proto-Oncogene Proteins; D050783:Proto-Oncogene Proteins c-ets; D012333:RNA, Messenger; D017978:Receptors, Growth Factor; D014157:Transcription Factors; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors; D020794:Receptor Protein-Tyrosine Kinases; D040262:Receptors, Vascular Endothelial Growth Factor; D040281:Vascular Endothelial Growth Factor Receptor-1