Comparative stereological evaluation of the term allantochorion membrane in the mare pregnant with mule foals and equine foals

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art_TINEL_Comparative_stereological_evaluation_of_the_term_allantochorion_membrane_2023.PDF (4.83 MB)
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0
Tipo de produção
article
Data de publicação
2023
DOI
Scopus
Web of Science
PubMed
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Autores
TINEL, Julia Boldrini
ALONSO, Maria Augusta
FERNANDES, Claudia Barbosa
Citação
ANIMAL REPRODUCTION SCIENCE, v.250, article ID 107201, 9p, 2023
Projetos de Pesquisa
Unidades Organizacionais
Fascículo
Resumo
Mules are derived from crossing horse mares with a donkey, in which the interest is due to gentleness and ability to work and equestrian sports. As the placenta is responsible for fetal development and maturation, knowing its typical microstructure allows us to understand how fetomaternal interactions occur in this interspecific pregnancy. Thus, the study performed a comparative stereological evaluation of volumetric composition and fetomaternal contact surface in the uterine body (UB), gravid uterine horn (GUH), and nongravid uterine horn (NGUH) of Mangalarga Paulista mare's term allantochorion membrane in mule and equine pregnancies. In equine gestation, the UB microcotyledon surface density was negatively correlated with the NGUH absolute area and the total volume of microvilli. In mule gestation, the base width and the number of microcotyledon were negatively correlated with the height and number of micro-cotyledons in the NGUH. Mule also showed a negative correlation between (1) the UB micro-cotyledon surface density and the GUH microcotyledons number per unit of membrane length, (2) the GUH total volume and the NGUH microcotyledon number. Such differences demonstrate a compensatory mechanism in conversion capacity among macrocompartments. A trend toward a greater total volume of allantoid vessels and total volume of allantoid mesoderm in UB microvilli was found in the equine and mule groups, respectively. There was a significant increase in the base width of microcotyledons in the NGUH of mules versus horses. These finds possibly influence the exchange capacity of each placental microregion and suggest a difference between mule versus horse term allantochorion membrane.
Palavras-chave
Interspecific pregnancy, Comparative stereology, Allantochorion membrane
URI
https://observatorio.fm.usp.br/handle/OPI/53272
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Coleções
Artigos e Materiais de Revistas Científicas - LIM/05