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

Autores

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

DOI:

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

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.

Biografia do Autor

Ana Flávia de Carvalho

Centro Universitário da Fundação de Ensino Octávio Bastos
Faculdade de Medicina Veterinária
Av. Octávio Bastos s/n, Campus II, CEP 13 870-000, São João da Boa Vista – SP, Brazil

Carlos Eduardo Ambrósio

Universidade de São Paulo, Faculdade de Medicina Veterinária
Departamento de Cirurgia, Anatomia dos Animais Domésticos e Silvestres
Av. Orlando Marques de Paiva, 87, CEP 05508-270, São Paulo – SP, Brazil

Maria Angélica Miglino

Universidade de São Paulo, Faculdade de Medicina Veterinária
Departamento de Cirurgia, Anatomia dos Animais Domésticos e Silvestres
Av. Orlando Marques de Paiva, 87, CEP 05508-270, São Paulo – SP, Brazil

Celina Almeida Furlanetto Mançanares

Centro Universitário da Fundação de Ensino Octávio Bastos
Faculdade de Medicina Veterinária
Av. Octávio Bastos s/n, Campus II, CEP 13 870-000, São João da Boa Vista – SP, Brazil

Francisco Javier Hernandez Blazquez

Universidade de São Paulo, Faculdade de Medicina Veterinária
Departamento de Cirurgia, Anatomia dos Animais Domésticos e Silvestres
Av. Orlando Marques de Paiva, 87, CEP 05508-270, São Paulo – SP, Brazil

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Publicado

2009-08-11

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