title: Analysis of the expression of estrogen and progesteron receptors, and of PCNA and Ki67 proliferation antigens, in uterine myomata cells in relation to the phase of the menstrual cycle.
abstract: BACKGROUND
  The purpose of this study was to provide an immunocytochemical evaluation of the expression of receptors for estrogens (ER) and progesterone (PgR), and of Ki67 and PCNA (proliferating cell nuclear antigen) proliferation antigens in uterine myomata cells in three groups of patients operated in various phases of the menstrual cycle, and to determine the relationship between the expression of the receptors, the proliferative activity of myoma cells, and the phase of the menstrual cycle during which the tumor was excised.
  
  
  METHODS
  The studies were performed on samples of uterine 85 leiomyomata. Twelve of the patients were operated in the follicular phase of menstrual cycle, 50 in the luteal phase, and 27 in the post-menopausal period. The receptors and proliferating antigens were detected immunocytochemically. The intensity of the immunocytochemical reaction was evaluated using the ImmunoReactive Score (IRS).
  
  
  RESULTS
  In all three groups of patients the expression of PgR significantly exceeded that of ER. Also, in all the patients the mean expression of PCNA significantly exceeded the expression of Ki76.
  
  
  CONCLUSIONS
  The expression of the studied antigens did not depend upon the phase of the menstrual cycle, and was similar in the postmenopausal period.
authors.affiliation: Department of Obstetrics and Gynaecology, Voivodeship Hospital, Legnica, Poland.
authors.forename: R
authors.initials: R
authors.lastname: Zasławski
authors.forename: P
authors.initials: P
authors.lastname: Surowiak
authors.forename: P
authors.initials: P
authors.lastname: Dziegiel
authors.forename: L
authors.initials: L
authors.lastname: Pretnik
authors.forename: M
authors.initials: M
authors.lastname: Zabel
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D019394:Ki-67 Antigen / Q000378:metabolism*; D007889:Leiomyoma / Q000378:metabolism; D008597:Menstrual Cycle / Q000502:physiology*; D008875:Middle Aged; D018809:Proliferating Cell Nuclear Antigen / Q000378:metabolism*; D011960:Receptors, Estrogen / Q000378:metabolism*; D011980:Receptors, Progesterone / Q000378:metabolism*; D013223:Statistics as Topic; D014594:Uterine Neoplasms / Q000378:metabolism*
chemical_list: D019394:Ki-67 Antigen; D018809:Proliferating Cell Nuclear Antigen; D011960:Receptors, Estrogen; D011980:Receptors, Progesterone