Publication Database

Ovarian capillary blood supply in different breeds of dairy cows (2022)

Art

Poster

Autoren

Rieger, Juliane

Kordowitzki, Paweł

Merle, Roswitha (WE 16)

Plendl, Johanna (WE 1)

Kaessmeyer, Sabine

Kongress

33rd Congress of the European Association of Veterinary Anatomists

Ghent, Belgium, 28. – 31.07.2021

Quelle

Anatomia, histologia, embryologia

Bandzählung: 51

Heftzählung: S1

Seiten: 49

ISSN: 0340-2096

Sprache

Englisch

Verweise

URL (Volltext): https://onlinelibrary.wiley.com/doi/10.1111/ahe.12759

DOI: 10.1111/ahe.12759

Kontakt

Institut für Veterinär-Epidemiologie und Biometrie

Königsweg 67
14163 Berlin
+49 30 838 56034
epi@vetmed.fu-berlin.de

Abstract / Zusammenfassung

Introduction:
High-producing dairy cows suffer from health and fertility problems at a young age. Vascularization plays a fundamental role in the reproductive organs and changes with aging. We hypothesize that due to the enormous milk yield of Friesian breeds they are comparable to high-performance athletes who suffer from increased angiogenesis and premature aging.

Materials and Methods:
The high-performance breed Holstein-Friesian (HF, n = 5) was compared to a dual-purpose breed, the Polish Red Cattle (PR, n = 5). Ovarian tissue (zona parenchymatosa and vasculosa) was sampled at a slaughterhouse, formalin-fixed and paraffin-embedded. Blood vessels were labeled via lectin-histochemistry. Angiogenesis parameters were analysed lightmicroscopically in two areas - theca folliculi of tertiary follicles and in zona parenchymatosa without functional structures: number of capillaries per area, intercapillary distance, capillary size, area of individual capillary lumina and percentage area occupied by capillaries.

Results:
It has been shown that the larger the tertiary follicle, the stronger the vascularization. PR had larger capillaries. Distance between capillaries became smaller with increasing age. A quadratic influence of age on vascularization could be shown. Capillary area decreased first and from 70 months of age increased again. No correlation was found between the two measurement areas.

Conclusion:
The influence of age on the area occupied by capillaries was significant but may not have any effect as it may have been biased by race or sample distribution. Since the distance between the capillaries was influenced by age, it can be assumed that there could still be an influence on vascularization.

All husbandry and experimental procedures were approved by the local ethics committee for animal experiments in Olsztyn (No. 72/2019 in the area of application 68/2019).