Structure and cell type distribution in the pituitary gland of pejerrey Odontesthes bonariensis.

GUSTAVO M SOMOZA; PAULA VISSIO; MARIA C MAGGESE; DANTE PAZ; CARLOS STRÜSSMANN,; GUSTAVO M SOMOZA

FISHERIES SCIENCE

SPRINGER TOKYO

Año: 1997 vol. 63 p. 64 - 68

0919-9268

Antisera raised against piscine pituitary hormones and heterologous antisera against mammalianpituitary hormones were used to analyze the types and distribution patterns of cells in the adenohypophysis of pejerrey Odontesthes bonariensis. Prolactin (PRL) cells were immunostained in the external border of the rostral pars distalis using anti-chum salmon PRL and anti-carp PRL . Immunoreactive (ir-)corticotrophic (ACTH) cells were identified in the same area using anti-human ACTH and crossreactivity was observed in the pars intermedia (PI), corresponding to the presumptive melanocyte stimulating hormone cells. Ir-growth hormone (GH) cells were identified in close contact with the neurohypophysis in the proximal pars distalis (PPD) using anti-chum salmon GH and anti-carp GH antisera. Ir-gonadotrophic (GtH) cells were distributed in the PPD and in the external area of the PI. Two forms of GtH were identified using antisera raised against chum salmon GtHI-Beta and GtHII-Beta and anti-croaker maturational GtH. Ir-thyroid-stimulating hormone (TSH) cells were revealed with an anti-human TSHBeta antiserum in the PPD. Ir-somatolactin (SL) cells were detected in the PI using two antisera raisedagainst chum salmon and red drum SL.