Immimohistochemically-determined changes in the distribution of insulin-like growth factor-I (IGF-I) and epidermal growth factor (EGF) in the bovine endometrium during the estrous cycle

Shintaro Ohtani, Kiyoshi Okuda, Masayuki Ohtani, Junzo Yamada

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12 Citations (Scopus)

Abstract

The aims of this study were to investigate whether there are cell-specific distributions of insulin-like growth factor I (IGF-I) and epidermal growth factor (EGF) in the endometrium, and to determine whether or not the expression of these factors varies with the stage of the estrous cycle. Fifty-four endometrial biopsy specimens were collected from normal cycle Holstein-Friesian heifers. The endometrial specimens were divided into nine groups (at least five different animals per group) corresponding to the following days of the cycle: days 20-0, 1-3, 4-5, 6-7, 8-10, 11-13, 14-15, 16-17 and 18-19 (day 0=estrus). IGF-I and EGF were localized by immunohistochemistry in the intact heifer endometrium throughout the estrous cycle. Throughout the estrous cycle, IGF-I was localized in the luminal epithelium and stroma with a little staining in the glandular epithelium (P<0.01). In the luminal epithelium, the number of IGF-I-positive cells increased on days 1-3, 6-7, 11-13 and 16-17. In the stroma, the number of IGF-I-positive cells increased on days 8-10 and 20-3. The number of positively stained cells in the glandular epithelium increased around the estrous period. EGF stained intensely in the stroma but very little in the luminal and glandular epithelia (P<0.01). In the stroma, three peaks in the number of EGF-positve cells were observed on days 1-3, 6-7 and 11-13. These results demonstrate cyclical changes in the endometrial cell types localization of IGF-I and EGF.

Original languageEnglish
Pages (from-to)1211-1217
Number of pages7
JournalJournal of Veterinary Medical Science
Volume58
Issue number12
DOIs
Publication statusPublished - Dec 1996

Keywords

  • Bovine endometrium
  • Epidermal growth factor
  • Immunohistochemistry
  • Insulin-like growth factor I

ASJC Scopus subject areas

  • veterinary(all)

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