Cellular retinol-binding protein-1 expression in endometrial stromal cells: Physiopathological and diagnostic implications

Augusto Orlandi, A. Ferlosio, A. Ciucci, F. Sesti, B. Lifschitz-Mercer, G. Gabbiani, L. G. Spagnoli, B. Czernobilsky

Research output: Contribution to journalArticlepeer-review

Abstract

Aims: Cellular retinol-binding protein-1 (CRBP-1) contributes to the maintenance of the differentiated state of the endometrium through retinol bioavailability regulation. The aim was to analyse CRBP-1 expression in endometrial stromal cells at eutopic and ectopic sites in different physiopathological conditions. Methods and results: Antibodies to CRBP-1, CD10 and α-smooth muscle actin were applied to proliferative (n = 10), secretory (n = 9) and atrophic (n = 7) endometrium, decidua (n = 4), adenomyosis (n = 5), endometriosis (n = 10), endometrial polyps (n = 9), simple endometrial hyperplasia (n = 6), well-differentiated endometrioid carcinoma (n = 6) and submucosal leiomyomas (n = 5). In some cases, Western blotting and reverse transcription-polymerase chain reaction were also applied. CRBP-1 was expressed by eutopic and ectopic endometrial stromal cells more markedly during the late secretory phase and in decidua of pregnancy. CRBP-1 expression was low in the stroma of atrophic endometrium and absent in myometrium, leiomyomas and cervical stroma. CD10 immunoreactivity was weak in atrophic endometrium and in decidua. Conclusions: CRBP-1 expression characterizes endometrial stromal cells at eutopic and ectopic sites and appears to be more specific than CD10. The level of CRBP-1 varies in intensity according to hormonal variations, reaching its maximum in predecidua and decidua. Thus, immunodetection of CRBP-1 may help to elucidate the physiopathological changes which occur in endometrial stroma and can also be applied as an adjuvant stromal marker.

Original languageEnglish
Pages (from-to)511-517
Number of pages7
JournalHistopathology
Volume45
Issue number5
DOIs
StatePublished - Nov 2004
Externally publishedYes

Keywords

  • Actin
  • Adenomyosis
  • CD10
  • Endometriosis
  • Physiopathology of endometrium

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