MORPHOLOGICAL AND FUNCTIONAL OBSERVATIONS ON THE CYCLIC CORPUS LUTEUM IN EGYPTIAN BUFFALOES (BUS BUBALIS) | ||
| Assiut Veterinary Medical Journal | ||
| Article 1, Volume 40.2, Issue 80, January 1999, Pages 1-16 PDF (5.72 M) | ||
| Document Type: Research article | ||
| DOI: 10.21608/avmj.1999.182320 | ||
| Authors | ||
| A.E. Zayed1; G.A. Megahed2 | ||
| 1Dept. of Anatomy and Histology Fac. Vet. Med., Assiut Univ. | ||
| 2Dept. of Theriogenology, Fac. Vet. Med., Assiut Univ | ||
| Abstract | ||
| This study was conducted on 50 Egyptian buffalo-cows aging 3-6 years. The material employed for this study was obtained from Mosha slaughter house near Assiut. Corpora lutea were collected and used for studying the histomorphological picture of corpus luteum during different phases of luteal regression. Blood samples were obtained before slaughtering and used for hormonal assay. The corpus luteum was made up of luteal and non-luteal constituents. The latter represented an increasing volume percentage of the total CL mass during luteal regression (about 13% in CL; to about 20% in CL1). There was difficulty to differentiate between granulosa and theca luteal cells because of their structural similarity. The present investigation ascertained a positive correlation between the histomorphologically active luteal cells in CL; and the level of progesterone in the blood as well as the weight of corpus luteum. Well developed SER, abundant mitochondria and many dense granules accompanied high progesterone level and low estradiol-17B in the blood during the stage of CLz. Luteal regression was revealed by reduced activity of luteal cells, decrease weight of corpus luteum, decrease progesterone hormone with an increase in estradiol-17B levels in the blood. In CLT, dark cells were demonstrated displaying the features of protein secretion (well developed RER). These cells were junctioned with normal luteal cells and may play a role in formation of collagen and production of proteolytic enzymes to help in disintegration of luteal cells. | ||
| Keywords | ||
| Keywords: Corpus luteum; morphology; Luteal cells; Progesterone; Estradiol | ||
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