Persistence after hypothalamectomy of a tamoxifen-like effect in the ovary of quail embryos exposed cyclically in ovo to low incubation temperatures
- Author
- M Callebaut, Katharina D'Herde (UGent) , L van Nassauw and F Harrisson
- Organization
- Abstract
- Three days old quail embryos were hypothalamectomized in ovo by the decapitation technique according to Callebaut (1993). Half of these embryos was exposed to day cyclically repeated prolonged low subnormal incubation temperatures (25 degrees C). The other half of these decapitated embryos was normally continuously incubated. As is the case for not decapitated embryos the ovaries of the first group presented a tamoxifen like effect: cortical rim atrophy with proportional hypertrophy of the medulla and a pronounced decrease in the number of oogonia and oocytes. By contrast the ovaries of the second group of decapitated embryos presented a normal aspect without sterilization of the ovigerous sex cords. It was concluded that: 1. the hypophysis, the hypothalamus or other prosencephalic tissues play no intermediary role in the establishment of a tamoxifen like effect in the ovary; 2. the early embryonic development of the quail ovary during the considered period takes place without the intervention of the hypothalamus.
- Keywords
- hypothalamectomy, quail embryonic ovary, cyclical cold exposure, tamoxifen
Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-187085
- MLA
- Callebaut, M., et al. “Persistence after Hypothalamectomy of a Tamoxifen-like Effect in the Ovary of Quail Embryos Exposed Cyclically in Ovo to Low Incubation Temperatures.” EUROPEAN JOURNAL OF MORPHOLOGY, vol. 33, no. 5, 1995, pp. 485–90.
- APA
- Callebaut, M., D’Herde, K., van Nassauw, L., & Harrisson, F. (1995). Persistence after hypothalamectomy of a tamoxifen-like effect in the ovary of quail embryos exposed cyclically in ovo to low incubation temperatures. EUROPEAN JOURNAL OF MORPHOLOGY, 33(5), 485–490.
- Chicago author-date
- Callebaut, M, Katharina D’Herde, L van Nassauw, and F Harrisson. 1995. “Persistence after Hypothalamectomy of a Tamoxifen-like Effect in the Ovary of Quail Embryos Exposed Cyclically in Ovo to Low Incubation Temperatures.” EUROPEAN JOURNAL OF MORPHOLOGY 33 (5): 485–90.
- Chicago author-date (all authors)
- Callebaut, M, Katharina D’Herde, L van Nassauw, and F Harrisson. 1995. “Persistence after Hypothalamectomy of a Tamoxifen-like Effect in the Ovary of Quail Embryos Exposed Cyclically in Ovo to Low Incubation Temperatures.” EUROPEAN JOURNAL OF MORPHOLOGY 33 (5): 485–490.
- Vancouver
- 1.Callebaut M, D’Herde K, van Nassauw L, Harrisson F. Persistence after hypothalamectomy of a tamoxifen-like effect in the ovary of quail embryos exposed cyclically in ovo to low incubation temperatures. EUROPEAN JOURNAL OF MORPHOLOGY. 1995;33(5):485–90.
- IEEE
- [1]M. Callebaut, K. D’Herde, L. van Nassauw, and F. Harrisson, “Persistence after hypothalamectomy of a tamoxifen-like effect in the ovary of quail embryos exposed cyclically in ovo to low incubation temperatures,” EUROPEAN JOURNAL OF MORPHOLOGY, vol. 33, no. 5, pp. 485–490, 1995.
@article{187085,
abstract = {{Three days old quail embryos were hypothalamectomized in ovo by the decapitation technique according to Callebaut (1993). Half of these embryos was exposed to day cyclically repeated prolonged low subnormal incubation temperatures (25 degrees C). The other half of these decapitated embryos was normally continuously incubated. As is the case for not decapitated embryos the ovaries of the first group presented a tamoxifen like effect: cortical rim atrophy with proportional hypertrophy of the medulla and a pronounced decrease in the number of oogonia and oocytes.
By contrast the ovaries of the second group of decapitated embryos presented a normal aspect without sterilization of the ovigerous sex cords. It was concluded that:
1. the hypophysis, the hypothalamus or other prosencephalic tissues play no intermediary role in the establishment of a tamoxifen like effect in the ovary;
2. the early embryonic development of the quail ovary during the considered period takes place without the intervention of the hypothalamus.}},
author = {{Callebaut, M and D'Herde, Katharina and van Nassauw, L and Harrisson, F}},
issn = {{0924-3860}},
journal = {{EUROPEAN JOURNAL OF MORPHOLOGY}},
keywords = {{hypothalamectomy,quail embryonic ovary,cyclical cold exposure,tamoxifen}},
language = {{eng}},
number = {{5}},
pages = {{485--490}},
title = {{Persistence after hypothalamectomy of a tamoxifen-like effect in the ovary of quail embryos exposed cyclically in ovo to low incubation temperatures}},
volume = {{33}},
year = {{1995}},
}