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Pigmented Cells in the Pineal Gland of Female Viscacha (Lagostomus maximus maximus): A Histochemical and Ultrastructural Study
Joint Authors
Mohamed, Fabian Heber
Busolini, Fabricio Ivan
Rodríguez, Graciela Beatriz
Filippa, Verónica Palmira
Source
International Journal of Endocrinology
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-12-17
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
The presence of pigment has been demonstrated in different nervous structures such as those of retina, substantia nigra, and locus coeruleus.
These pigments have also been described in the pineal gland of different mammal species.
Histochemical and ultrastructural studies of the pineal gland of female viscacha (Lagostomus maximus maximus) were performed to analyze the presence of pigmented cells under natural conditions and to evaluate a probable relation between pigment content and glandular activity during pregnancy.
The following techniques were applied: hematoxylin-eosin, phosphotungstic acid-hematoxylin, Masson-Fontana silver, DOPA histochemistry, Schmorl’s reaction and toluidine blue.
Estradiol and progesterone serum levels were determined by RIA.
The ultrastructural features of the pineal pigment granules were also analyzed.
Pigment granules were observed in a random distribution, but the pigmented cells were frequently found near blood vessels.
The pineal pigment was histochemically identified as melanin.
Differences in the amount of pigmented cells were found between pregnant and nonpregnant viscachas.
The ultrastructural analysis revealed the presence of premelanosomes and melanosomes.
Estradiol and progesterone levels vary during pregnancy.
In conclusion, the changes in the amount of pigment content and hormone levels may indicate that the pineal gland of female viscacha is susceptible to endocrine variations during pregnancy.
American Psychological Association (APA)
Busolini, Fabricio Ivan& Rodríguez, Graciela Beatriz& Filippa, Verónica Palmira& Mohamed, Fabian Heber. 2017. Pigmented Cells in the Pineal Gland of Female Viscacha (Lagostomus maximus maximus): A Histochemical and Ultrastructural Study. International Journal of Endocrinology،Vol. 2017, no. 2017, pp.1-8.
https://search.emarefa.net/detail/BIM-1166567
Modern Language Association (MLA)
Busolini, Fabricio Ivan…[et al.]. Pigmented Cells in the Pineal Gland of Female Viscacha (Lagostomus maximus maximus): A Histochemical and Ultrastructural Study. International Journal of Endocrinology No. 2017 (2017), pp.1-8.
https://search.emarefa.net/detail/BIM-1166567
American Medical Association (AMA)
Busolini, Fabricio Ivan& Rodríguez, Graciela Beatriz& Filippa, Verónica Palmira& Mohamed, Fabian Heber. Pigmented Cells in the Pineal Gland of Female Viscacha (Lagostomus maximus maximus): A Histochemical and Ultrastructural Study. International Journal of Endocrinology. 2017. Vol. 2017, no. 2017, pp.1-8.
https://search.emarefa.net/detail/BIM-1166567
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1166567