Histological characteristics of the corpus luteum of Nelore cows in the first, second and third trimester of pregnancy

Xavier, P.R.; Silva, P.V.D. Oliveira e; Júnior, A.P. Marques

doi:10.1590/s0102-09352012000200036

Cited by 7 publications

(11 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Comparing the histology of the CL in three trimesters of pregnancy (Xavier et al, 2012), reported that the morphometric characteristics of luteal steroidogenic cells did not change. However, by the end of pregnancy, there was an increase in connective tissue, the number of fibroblasts and extracellular matter, especially after 190 days of pregnancy.…”

Section: Discussionmentioning

confidence: 99%

“…In cows, the CL is represented by granulose-luteal cells of large size and by small theka-luteal cells. Thekaluteal cells are located mainly peripherally; they penetrate the thickness of the CL together with connective tissue trabeculae (Cools et al, 2013b;Walusimbi and Pate, 2014;Xavier et al, 2012). In cows, luteal cells of "average size" are described; they are allocated to a special class with significant morphofunctional features.…”

Section: Discussionmentioning

confidence: 99%

“…For many years, the morphology and function of bovine ovarian lutein structures have been the subject of intense research and discussion (Costa et al, 2020;Mogheiseh et al, 2020;Walusimbi and Pate, 2014;Xavier et al, 2012). The cellular composition of the CL has not been definitively determined (Fields and Fields, 1996;Fields et al, 1992;Parkinson et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

“…Histologically, the bovine CL is formed by granulosa luteal cells of large size and small theka-luteal cells which are located in different zones (Cools et al, 2013a;Walusimbi and Pate, 2014;Xavier et al, 2012). Large luteal cells of cysts and cyclic CL have significant morphological differences.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Morphology and Histochemistry of the Corpus Luteum (CL) of Ovaries of Pregnant and Infertile Cows

Skovorodin

Bogolyuk

Bazekin

et al. 2020

American Journal of Animal and Veterinary Sciences

View full text Add to dashboard Cite

The purpose of our study is to study the functional morphology of the Corpus Luteum (CL) of the ovaries of pregnant and infertile cows in normal and pathological conditions. For that purpose, the ovaries of cows were examined after slaughter, histological and histochemical examination of the CL was carried out. For the antemortem examination of the ovary, the biopsy method developed by us was used. The effect of the synthetic analogy of prostaglandin F2α-Klatiram was studied experimentally. It was established that the CL and luteal formations of the ovaries of those animals had significant changes in structure, which allowed us to develop morphological markers for diagnosing their morphofunctional state. It was found that the mass and size of the CL increases by two months, decreases by three months and then remain relatively stable. There is a growth of antral follicles that reach a size of more than 1 cm and then they undergo atresia of the obliteration type. The CL of the ovary cycle reaches its maximum development in the first ten or twelve days. Later, against the background of venous hyperemia and atrophic changes, it decreases, the lobulation of the parenchyma disappears and the vessels sclerose (the stage of involution). A method of biopsy of the bovine ovaries has been developed. The use of this method, with the experimental introduction of a synthetic analog of prostaglandin F2a, has proved that luteolytic processes in the CL of the ovary cycle develop due to violations of the microcirculatory bloodstream, development of necrobiotic processes in the parenchyma and stromal vascular dystrophy of the mesenchyma of the gland.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Morphology and Histochemistry of the Corpus Luteum (CL) of Ovaries of Pregnant and Infertile Cows

Skovorodin

Bogolyuk

Bazekin

et al. 2020

American Journal of Animal and Veterinary Sciences

View full text Add to dashboard Cite

show abstract

“…Esse resultado foi semelhante ao encontrado por Xavier et al (2012), que verificaram que esses grânulos estão presentes em maior quantidade ao final do segundo terço e durante o terceiro terço da gestação. A ausência de grânulos citoplasmáticos em células lúteas menores sugere que essas células apresentam menor atividade em relação as células maiores e talvez menor participação no processo de luteólise e na manutenção da gestação.…”

Section: Resultsunclassified

Morfologia e grânulos citoplasmáticos do corpo lúteo de vacas aneloradas (Bos taurus indicus) gestantes e não gestantes

Vargas¹,

Xavier²,

Rezende³

et al. 2015

Arq. Bras. Med. Vet. Zootec.

Self Cite

View full text Add to dashboard Cite

 RESUMOAvaliaram-se a proporção volumétrica dos constituintes do corpo lúteo e a distribuição de células lúteas com grânulos citoplasmáticos no corpo lúteo de animais Nelore ao longo da gestação e em animais não gestantes. Foram coletados ovários com corpos lúteos de 24 animais abatidos em frigorífico. Os animais foram distribuídos em dois grupos: gestantes e não gestantes. A idade gestacional foi determinada pela medição do comprimento apicocaudal do feto. Os ovários foram distribuídos segundo o trimestre gestacional: primeiro  gestação de até 90 dias; segundo -de 91 a 180 dias; e terceiro  de 181 a 270 dias. Os corpos lúteos, processados para inclusão em paraplast, foram avaliados em microscópio de luz. Na proporção volumétrica do corpo lúteo, os constituintes avaliados foram citoplasma e núcleo de células lúteas, tecido conjuntivo e fibroblastos, células endoteliais e pericitos e vasos sanguíneos. A proporção volumétrica de citoplasma de células lúteas reduziu de 46,1±2,8% para 37,9±3,5% e a de núcleo de células lúteas reduziu de 9,2±1,0% para 6,2±1,0%, do primeiro para o segundo trimestre. A proporção de tecido conjuntivo e fibroblastos aumentou de 20,9±5,4%, no primeiro trimestre, para 34,0±4,2%, no segundo trimestre. Grânulos citoplasmáticos foram evidenciados pelas técnicas histoquímicas xylidine ponceau e azul de bromofenol, que indicam sua provável composição proteica. A quantidade de células maiores com grânulos aumentou significativamente de 2,3±1,9%, no primeiro trimestre, para 25,5±20,3%, no segundo. A proporção volumétrica de citoplasma e núcleo de células lúteas diminuiu ao longo da gestação, e a de tecido conjuntivo aumentou. A quantidade de células lúteas maiores contendo grânulos também aumentou ao longo da gestação.Palavras-chave: Nelore, corpo lúteo, histologia, grânulos citoplasmáticos ABSTRACT

show abstract

Role of luteal biosynthesis of prostaglandin F2α on function and structure of the corpus luteum during luteolysis in heifers

Pinaffi

Araujo

2018

Domestic Animal Endocrinology

View full text Add to dashboard Cite

Histological characteristics of the corpus luteum of Nelore cows in the first, second and third trimester of pregnancy

Abstract: Communication

Cited by 7 publications

References 8 publications

Morphology and Histochemistry of the Corpus Luteum (CL) of Ovaries of Pregnant and Infertile Cows

Morphology and Histochemistry of the Corpus Luteum (CL) of Ovaries of Pregnant and Infertile Cows

Morfologia e grânulos citoplasmáticos do corpo lúteo de vacas aneloradas (Bos taurus indicus) gestantes e não gestantes

Role of luteal biosynthesis of prostaglandin F2α on function and structure of the corpus luteum during luteolysis in heifers

Contact Info

Product

Resources

About