Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2023 Mar;52(2):336-340.
doi: 10.1111/ahe.12885. Epub 2022 Nov 7.

Histomorphological changes between short and long days in ovary guanacos (Lama guanicoe)

Lina Maria Correa E  1   2 , Ricardo D Moreno  3 , José Luis Riveros  4
Affiliations

Histomorphological changes between short and long days in ovary guanacos (Lama guanicoe)

Lina Maria Correa E et al. Anat Histol Embryol. 2023 Mar.

Abstract

This is the first morpho-histological comparison of guanaco ovaries between reproductive (long-days) and non-reproductive (short-days) seasons, and oestrogen receptor-alpha (ERα) and beta (ERβ) detection. Different stages of follicle development were found in the cortical area, but no corpus luteum was detected. The size and frequency of antral follicles and large atretic follicles were higher in long-day ovaries than short-days, consistent with ovarian activity in this season. Differential expression of ERα and ERβ was observed in follicles at different stages of development between short and long days. These data reveal histological and molecular differences between reproductive and non-reproductive seasons of guanaco ovaries.

Keywords: guanaco; histology; oestrogen receptors; ovary; seasonal breeders.

PubMed Disclaimer

References

REFERENCES

    1. Arias, P., Feder, F. H., Porcel, R., & Cox, J. (1992). Comparative histological study of the reproductive system of the female llama (Lama guanicoe glama). I. Ovary. Anatomia, Histologia, Embryologia, 21(4), 314-323. https://doi.org/10.1111/j.1439-0264.1992.tb00463.x
    1. Bianchi, C. P., Sahlin, L., Meikle, A., Masironi, B., Cavilla, M. V., & Aba, M. A. (2010). Endometrial population of oestrogen receptors alpha and beta and progesterone receptors a and B during the different phases of the follicular wave of llamas (Lama glama). Reproduction in Domestic Animals, 45(5), 872-880.
    1. Chandrasekher, Y. A., Melner, M. H., Nagalla, S. R., & Stouffer, R. L. (1994). Progesterone receptor, but not estradiol receptor, messenger ribonucleic acid is expressed in luteinizing granulosa cells and the corpus luteum in rhesus monkeys. Endocrinology, 135(1), 307-314.
    1. Clark, B. J., Soo, S.-C., Caron, K. M., Ikeda, Y., Parker, K. L., & Stocco, D. M. (1995). Hormonal and developmental regulation of the steroidogenic acute regulatory protein. Molecular Endocrinology, 9(10), 1346-1355.
    1. Davoodian, N., Mesbah, F., & Kafi, M. (2011). Oocyte ultrastructural characteristics in camel (Camelus dromedarius) primordial to large antral follicles. Anatomia, Histologia, Embryologia, 40(2), 120-127.

Substances

LinkOut - more resources