Qualitative and quantitative morphological studies of the cells of the membrana granulosa, theca interna and corpus luteum of the bovine ovary

1968 ◽  
Vol 85 (4) ◽  
pp. 501-520 ◽  
Author(s):  
Janis Priedkalns ◽  
Alvin F. Weber ◽  
Raimunds Zemjanis
Keyword(s):  
Corpus Luteum ◽  
Qualitative And Quantitative ◽  
Morphological Studies ◽  
Bovine Ovary ◽  
Theca Interna

Memoirs: The Structure of the Ovary and the Formation of the Corpus Luteum in Hoplodactylus Maculatus, Gray

1940 ◽  
Vol s2-82 (326) ◽  
pp. 337-374
Author(s):  
MARY M. M. BOYD
Keyword(s):  
Corpus Luteum ◽  
Zona Pellucida ◽  
Single Layer ◽  
Small Cells ◽  
Follicular Epithelium ◽  
Male And Female ◽  
Physiological Importance ◽  
Egg Membrane ◽  
Theca Externa ◽  
Theca Interna

The structure of the ovary, including stages in the ripening of the oocytes, is described. A prolonged diplotene stage with ‘lamp-brush’ chromosomes is shown to occur in reptiles, as in other classes of vertebrates with large yolky eggs. The striated layer of the egg membrane is shown to be composed of the same cuticular substance as the zona pellucida. A follicular epithelium composed of three types of cells, later reduced to a single layer of small cells, agreeing with Loyez's observations, is described. A discontinuous theca interna, comparable with that of mammalia, is noted outside the membrana propria of the nearly ripe oocyte. A thin, soft, fibrous shell membrane is formed round the uterine egg and polyspermy occurs. The latebra, and the male and female pronuclei in apposition, are described. The corpus luteum is shown to consist of luteal cells invested by fibroblasts from the theca externa. Septa of fibroblasts are also present, but no blood-vessels. The theca is rich in capillaries. The theca interna plays no part in the development of the corpus luteum. A lipoid secretion, which may be of physiological importance, is formed in it. It is compared with that in Monotremes and Marsupials.

Embryo mortality and its prevention

1995 ◽  
Vol 1995 ◽  
pp. 8-8
Author(s):  
A R Peters
Keyword(s):  
Dairy Cows ◽  
Corpus Luteum ◽  
Early Pregnancy ◽  
Cycle Length ◽  
Ovarian Follicle ◽  
Biological Significance ◽  
Prostaglandin E ◽  
Embryo Mortality ◽  
Embryonic Loss ◽  
Theca Interna

The economic and biological significance of embryo mortality in cattle is well recognised. About 90% or more ova are fertilised at oestrus but only about 55% of dairy cows calve to first insemination (reviewed by Sreenan and Diskin, 1985). Of this 35% post fertilisation loss, most (25-30%) occurs within a cycle length therefore not affecting the time of return to the subsequent oestrus. It is also accepted that the maintenance of early pregnancy requires the secretion of progesterone by a viable corpus luteum and that premature luteolysis is the major cause of embryonic loss during these early days of pregnancy.The corpus luteum forms after ovulation from the cells of the granulosa and theca interna layers of the ovarian follicle. These are thought to differentiate into the large and small luteal cells respectively (Smith et al., 1994). The large cells secrete progesterone and oxytocin and are responsive to prostaglandin E whilst the small ones secrete progesterone and are responsive to LH (reviewed by Wiltbank, 1994).

scholarly journals The development and vascularisation of the corpus luteum in the mouse and rabbit

1930 ◽  
Vol 107 (748) ◽  
pp. 60-76 ◽  
Keyword(s):  
Connective Tissue ◽  
Corpus Luteum ◽  
Species Differences ◽  
Reasonable Doubt ◽  
Corpora Lutea ◽  
Functional Elements ◽  
Early Stages ◽  
Complete Series ◽  
The Subject ◽  
Theca Interna

The development of the corpus luteum from the ruptured follicle has been the subject of a very large number of memoirs. Of these the most important have been summarised by Van der Stricht (1912) up to 1912 and more recently by Hill and Gatenby (1926) and Corner (1919), so that no useful purpose would be served by recapitulating in detail the controversial discussions contained in them. Many of the older papers are not based on a complete series of early stages of early stages of corpora lutea, since either the material was not available, or else the writers were unable to diagnose accurately the time of œstus. Sobotta (1890, 1897), Cohn (1903), Marshall (1904, 1925), and van der Stricht 91912), however, drew their conclusions from a series of accurately dated ovaries, as have more recent workers (Cornern 1919; Drips, 1919; Hill and Gatenby, 1926; Kurashige, 1927; Long and Evans, 1922; and Watrin, 1924). It is now generally agreed-and has been shown conclusively in the work of Hill and Gatenby (1926)-that the lutein cells are formed by the enlargement of the follicullar epithelium. The fate of the theca interna cells, which surround the mature follicle prior to ovulation, is still a matter of dispute, and the problem is complicated by histological species differences. There seems no reasonable doubt, however, that these elements take part in the formation of the corpus luteum, since, in numerous cases, the typical fat containing cells, closely associated with the vascular connective tissue, can be distiguished among the follicular lutein cells after ovulation. It remains to be decided whether or not they persist as functional elements, and retain their individuality.

Do Macrophages Have Any Role In Corpus Luteum Formation In Bovine Ovary?

2017 ◽  
Vol 41 (5) ◽  
pp. S37
Author(s):  
Moafaq Samir ◽  
Dareen Mattar ◽  
Pillip Knight
Keyword(s):  
Corpus Luteum ◽  
Bovine Ovary

Embryo mortality and its prevention

1995 ◽  
Vol 1995 ◽  
pp. 8-8
Author(s):  
A R Peters
Keyword(s):  
Dairy Cows ◽  
Corpus Luteum ◽  
Early Pregnancy ◽  
Cycle Length ◽  
Ovarian Follicle ◽  
Biological Significance ◽  
Prostaglandin E ◽  
Embryo Mortality ◽  
Embryonic Loss ◽  
Theca Interna

The economic and biological significance of embryo mortality in cattle is well recognised. About 90% or more ova are fertilised at oestrus but only about 55% of dairy cows calve to first insemination (reviewed by Sreenan and Diskin, 1985). Of this 35% post fertilisation loss, most (25-30%) occurs within a cycle length therefore not affecting the time of return to the subsequent oestrus. It is also accepted that the maintenance of early pregnancy requires the secretion of progesterone by a viable corpus luteum and that premature luteolysis is the major cause of embryonic loss during these early days of pregnancy.The corpus luteum forms after ovulation from the cells of the granulosa and theca interna layers of the ovarian follicle. These are thought to differentiate into the large and small luteal cells respectively (Smith et al., 1994). The large cells secrete progesterone and oxytocin and are responsive to prostaglandin E whilst the small ones secrete progesterone and are responsive to LH (reviewed by Wiltbank, 1994).

scholarly journals Expression and localization of members of the thrombospondin family during final follicle maturation and corpus luteum formation and function in the bovine ovary

2016 ◽  
Vol 62 (5) ◽  
pp. 501-510 ◽  
Author(s):  
Bajram BERISHA ◽  
Dieter SCHAMS ◽  
Daniela RODLER ◽  
Fred SINOWATZ ◽  
Michael W. PFAFFL
Keyword(s):  
Corpus Luteum ◽  
Bovine Ovary ◽  
And Function ◽  
Follicle Maturation

scholarly journals Histochemical and immunohistochemical detection of neurons that produce nitric oxide: effect of different fixative parameters and immunoreactivity against non-neuronal NOS antisera.

1996 ◽  
Vol 44 (12) ◽  
pp. 1399-1413 ◽  
Author(s):  
T Gonzalez-Hernandez ◽  
M A Perez de la Cruz ◽  
B Mantolan-Sarmiento
Keyword(s):  
Nitric Oxide ◽  
Staining Pattern ◽  
Brain Perfusion ◽  
Immunohistochemical Detection ◽  
Experimental Conditions ◽  
Double Labeling ◽  
Qualitative And Quantitative ◽  
Morphological Studies ◽  
Quantitative Changes ◽  
Oxide Synthase

This study focused on two points concerning the histochemical and immunohistochemical detection of neurons that produce nitric oxide (NO): (a) the effect of fixation and other methodological parameters on the staining pattern of both NADPH-diaphorase (NADPH-d) histochemistry and nitric oxide synthase (NOS) immunohistochemistry, and (b) the possibility that neurons display immunoreactivity against NOS antisera obtained from non-neuronal sources. Frontal sections of rat brains, fixed with 4% paraformaldehyde according to different protocols, were processed for single and double labeling using NADPH-d histochemistry and neuronal (nNOS), macrophagic (macNOS), and endothelial (eNOS) NOS immunohistochemistry. Our results show that variations in the fixative schedule, even within standard parameters, produce qualitative and quantitative changes in NADPH-d labeling. The effect of fixative on weakly stained neurons is different from that on heavily stained neurons. In subfixed brains, a large number of NOS-positive neurons lose their NADPH-d activity, whereas NOS immunolabeling remains unaltered. This finding may be particularly interesting in morphological studies that compare NADPH-d activity under experimental conditions that can affect brain perfusion. On the other hand, many cortical and subcortical neurons show macNOS immunoreactivity, most of it colocalized with nNOS.

Immunohistochemical localization of 17α-hydroxylase/C17–20 lyase and aromatase cytochrome P-450 in the human ovary during the menstrual cycle

1992 ◽  
Vol 135 (3) ◽  
pp. 589-NP ◽  
Author(s):  
T. Tamura ◽  
J. Kitawaki ◽  
T. Yamamoto ◽  
Y. Osawa ◽  
S. Kominami ◽  
...  
Keyword(s):  
Menstrual Cycle ◽  
Corpus Luteum ◽  
Granulosa Cells ◽  
Polyclonal Antibodies ◽  
Immunohistochemical Localization ◽  
Corpora Lutea ◽  
Human Ovary ◽  
Normal Human ◽  
Theca Interna ◽  
Cytochrome P 450

ABSTRACT Immunohistochemical localization of 17α-hydroxylase/C17–20 lyase (P-45017α,lyase) and aromatase cytochrome P-450 (P-450arom) in normal human ovaries during the menstrual cycle was studied using specific polyclonal antibodies which were raised against corresponding enzymes. In the follicular phase of matured follicles, P-45017α,lyase was localized in theca interna cells and P-450arom in granulosa cells. P-45017α,lyase was expressed in theca interna cells before P-450arom was expressed in granulosa cells. The corpus luteum showed immunoreactivity to both enzymes and, after menstruation, immunoreactivity decreased gradually until it could not be detected in the corpus albicans. In corpus luteum graviditatis the immunoreactivity continued to be expressed strongly. In some atretic follicles, P-45017α,lyase and/or P-450arom continued to be expressed. In the stromal layer, P-45017α,lyase was detected in secondary interstitial cells, which originated from the theca interna of atretic follicles, and P-450arom was detected in hilar cells. Immunoreactivity to both enzymes was also detected in oocytes of developing follicles. These results are consistent with the two cell theory in the human ovary. They also suggest that androgens and oestrogens are produced not only by follicles and corpora lutea but also by stroma and oocytes. Journal of Endocrinology (1992) 135, 589–595

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