Macro-microscopical aspects of the buffalo (Bubalus bubalis Linnaeus, 1758) pineal gland

Ana Flávia de Carvalho, Carlos Eduardo Ambrósio, Maria Angélica Miglino, Celina Almeida Furlanetto Mançanares, Francisco Javier Hernandez Blazquez

Resumo


Gross and microscopical aspects of the buffalo pineal gland were described in seasonal parturition animals, since this gland is responsible for melatonin secretion which acts upon the hypothalamus-hypophysis reproductive axis feedback system. (Hafez, 1995). For the present study, 11 cross-bred buffaloes, predominantly of the Mediterranean breed, from the Pirassununga Campus - USP (University of São Paulo), were killed in different photoperiods in the slaughterhouse. The pineal glands were obtained, fixed, weighed, measured, photographed, processed, cut into sections and stained. All glands demonstrated the same global shape, with a mean length of 8.82 ± 1.07mm and a width of 7.91 ± 0.83mm, and a stem length of 5.50 ± 4.18mm. The stems had a microscopically visible lumen. The mean gland weight was 251.45 ± 83.1mg. The buffalo pineal gland presented right and left lobes of different sizes. Microscopically, they were surrounded by a connective tissue layer with blood vessels infiltrating into the glandular parenchyma, which became separated into glial cell lobules. A great number of the pinealocytes were arranged in irregular strings, and cells from the connective tissue could be observed in the glandular parenchyma. We conclude that the buffalo pineal gland is similar to that of pineal cows and that it does not show morphologic alterations during different photoperiods of the year.


Palavras-chave


Pineal gland; Buffalo; Pinealocytes

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DOI: https://doi.org/10.5007/2175-7925.2009v22n2p127

Direitos autorais 2011 Ana Flávia de Carvalho, Carlos Eduardo Ambrósio, Maria Angélica Miglino, Celina Almeida Furlanetto Mançanares, Francisco Javier Hernandez Blazquez

Licença Creative Commons
Esta obra está licenciada sob uma licença Creative Commons Atribuição 4.0 Internacional.

Biotemas. UFSC, Florianópolis, SC, Brasil, eISSN 2175-7925

Licença Creative Commons
Este periódico está licenciado conforme Creative Commons Atribuição 4.0 Internacional.