Immunohistochemical analysis of estrogen receptors, progesterone receptors and Ki-67 in leiomyoma and myometrium during the menstrual cycle and pregnancy

Immunohistochemical distribution of oestrogen receptors (ER), progesterone receptors (PR), and the cell proliferation-associated antigen Ki-67 was investigated in leiomyomas and the myometrium during the menstrual cycle and pregnancy. In the myometrium, ER expression was observed in the proliferativ...

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Bibliographic Details
Published in:Virchows Archiv A Pathological Anatomy and Histopathology 1991-01, Vol.419 (4), p.309-315
Main Authors: KAWAGUCHI, K, FUJII, S, KONISHI, I, IWAI, T, NANBU, Y, NONOGAKI, H, ISHIKAWA, Y, MORI, T
Format: Article
Language:English
Subjects:
Adult
Biological and medical sciences
Female
Female genital diseases
Gynecology. Andrology. Obstetrics
Humans
Immunohistochemistry
Ki-67 Antigen
Leiomyoma - chemistry
Medical sciences
Menstruation
Middle Aged
Myometrium - chemistry
Nuclear Proteins - chemistry
Pregnancy
Pregnancy Complications, Neoplastic - metabolism
Receptors, Estrogen - chemistry
Receptors, Progesterone - chemistry
Uterine Neoplasms - chemistry
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Summary:Immunohistochemical distribution of oestrogen receptors (ER), progesterone receptors (PR), and the cell proliferation-associated antigen Ki-67 was investigated in leiomyomas and the myometrium during the menstrual cycle and pregnancy. In the myometrium, ER expression was observed in the proliferative phase, but was suppressed in the secretory phase and during pregnancy. In leiomyomas, ER expression was observed throughout the menstrual cycle, but was suppressed during pregnancy. However, PR was expressed both in the myometrium and leiomyomas throughout the menstrual cycle and pregnancy. In both the myometrium and leiomyomas, a higher number of Ki-67-positive cells was observed during pregnancy than in the secretory phase, and Ki-67 was negative during menopause. The Ki-67-positive cell count in leiomyomas was significantly higher than that in the myometrium throughout the menstrual cycle and pregnancy. Thus both myometrium and leiomyomas have high growth activity under the hormonal milieu of high progesterone levels. The growth potential of leiomyomas is apparently higher than that of myometrium throughout the menstrual cycle and during pregnancy.
ISSN:0174-7398
1432-2307
DOI:10.1007/BF01606522