Ontogeny of immunoreactive somatolactin cells in the pituitary of gilthead sea bream ( Sparus aurata L., Teleostei)
| Autor: | M. Villaplana, A. García Ayala, B. Agulleiro, M. P. García Hernández |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Fish Proteins
Embryology medicine.medical_specialty Pituitary gland Ontogeny Immunocytochemistry Posterior region Biology Internal medicine medicine Animals Glycoproteins Teleostei Age Factors Pars intermedia Cell Biology biology.organism_classification Immunohistochemistry Perciformes Pituitary Hormones Endocrinology medicine.anatomical_structure Larva Pituitary Gland Anatomy Cell Division Developmental Biology |
| Zdroj: | Anatomy and Embryology. 196:227-234 |
| ISSN: | 1432-0568 0340-2061 |
| DOI: | 10.1007/s004290050093 |
| Popis: | This is the first report on the identification of somatolactin (SL) cells during the early developmental stages of the teleost fish Sparus aurata. The SL cells were followed from newly hatched until 46 months. SL cells were immunocytochemically identified at light microscopical level with anti-cod SL in the developing pituitary using the peroxidase-antiperoxidase method. SL cells first appeared in newly hatched specimens, in which the pituitary gland lacked the neurohypophysis. They were scarce and located from the middle to the posterior region of the adenohypophysis. As the fish developed, the cells progressively increased in number and surrounded the developing neurohypophysis, which could be distinguised from 12-day-old larvae onwards in the caudal region of the gland. From 51 days onwards, SL cells were found in a discontinuous layer surrounding the neurohypophysis branches that entered the pars intermedia as clustered or isolated cells among non-SL-immunoreactive cells of the pars intermedia, and in the proximal pars distalis. The somatolactin-immunoreactive cells are periodic acid-Schiff-positive only in the adult stages. These data confirm, previous findings concerning the presence of two molecular forms of SL, glycosylated and nonglycosylated, in this species. |
| Databáze: | OpenAIRE |
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