PMID: 6309607Jul 1, 1983Paper

Secretory activity of Poecilia latipinna (Teleostei) pituitary in vitro: rostral pars distalis and proximal pars distalis

General and Comparative Endocrinology
T F BattenJ N Ball

Abstract

The ultrastructure of each adenohypophysial secretory cell type was examined in pituitaries of adult female mollies (Poecilia latipinna) after various periods in vitro, and with varied medium osmotic pressure (OP), Na+, and Ca2+ concentrations. Prolactin (PRL) cells were markedly activated by 18 hr, and after 7 or 14 days were almost totally degranulated, with massive arrays of Golgi and RER. Reduction in OP, but not Na+ or Ca2+, caused an additional activation of PRL cells after periods of 18 hr or longer. Corticotroph (ACTH) cells became noticeably activated by 4 hr, and were possibly affected by OP, but not Na+ or Ca2+. Growth hormone (GH) cells were activated by 6 hr, and after 18 hr were quite degranulated with extensive arrays of RER. OP had no effect on GH cells before 3 days, when reduced OP appeared to cause an additional activation, with the appearance of large irregular secretory granule (SG)-like inclusions. Na+ and Ca2+ again had no effect. Gonadotrophic (GtH) cells appeared to be little affected by in vitro incubation; however, the very active cells from vitellogenic fish underwent a reduction in dilated RER after prolonged culture. Thyrotrophic (TSH) cells gradually became activated in vitro, but the response aga...Continue Reading

References

Aug 18, 1975·Cell and Tissue Research·T F BattenM Benjamin
Oct 1, 1977·General and Comparative Endocrinology·J N Fryer, R E Peter
Jul 1, 1979·Archivum Histologicum Japonicum = Nihon Soshikigaku Kiroku·M Nozaki, H Kobayashi
Oct 1, 1979·General and Comparative Endocrinology·J N FryerH A Bern
Nov 1, 1978·General and Comparative Endocrinology·T R Hall, A Chadwick
Feb 1, 1970·General and Comparative Endocrinology·M Sage, N R Bromage
Feb 1, 1968·General and Comparative Endocrinology·M Sage
Jun 1, 1969·General and Comparative Endocrinology·B I Baker
Jun 1, 1981·General and Comparative Endocrinology·J N Ball
Jan 1, 1983·General and Comparative Endocrinology·J P ChangR E Peter
Sep 21, 1981·Brain Research·H MünzL Jennes

Citations

Mar 1, 1986·General and Comparative Endocrinology·D J Groves, T F Batten
Mar 1, 1985·General and Comparative Endocrinology·S E Wendelaar BongaG J van Eys
Oct 1, 1988·General and Comparative Endocrinology·S E Wendelaar BongaG Flik

Related Concepts

Corticotropin
Gonadotropins
Osmotic Stress
Pituitary Gland, Anterior
Infundibular Stem
Prolactin
Thyrotropin

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