Corticotrophic Cells in the Pars intermedia Rostral Zone of the Mouse and Rat and their Relationship to Neurohypophysial Nerve Fibers and the Hypophysial Portal System

2015 ◽  
pp. 323-327 ◽  
Author(s):  
H.-D. Dellmann ◽  
M. E. Stoeckel ◽  
A. Porte ◽  
F. Stutinsky
Keyword(s):  
Nerve Fibers ◽  
Portal System ◽  
Pars Intermedia ◽  
Corticotrophic Cells ◽  
Hypophysial Portal

scholarly journals Some Observations on the Cytology of the Adenohypophysis of the Non-parous Female Rabbit

1959 ◽  
Vol s3-100 (51) ◽  
pp. 463-482
Author(s):  
M. ALLANSON ◽  
C. L. FOSTER ◽  
G. MENZIES
Keyword(s):  
Proteolytic Enzymes ◽  
Portal System ◽  
Pars Intermedia ◽  
Pars Tuberalis ◽  
Pars Distalis ◽  
Electron Microscopic ◽  
Female Rabbit ◽  
Lipid Inclusions ◽  
Cytological Characteristics ◽  
Hypophysial Portal

Evidence is presented which suggests that in this animal the pars tuberalis may have some function in addition to acting as a bed for the hypophysial portal system, since its cells appear rich in RNA. The granules of the cells of the pars intermedia are shown to be PAS-positive, but this reaction, unlike that of the basiphil cells of the pars distalis proper and the zona tuberalis, is readily prevented by pretreatment of sections with proteolytic enzymes. A study of the basiphil cells of the pars distalis proper and of the zona tuberalis, based on cytological characteristics, size, and shape, provides some evidence for the existence of two, and possibly three, kinds of basiphil cell. The lipid inclusions of the adenohypophysial cells and their relationship to the Golgi elements are described, together with some brief preliminary observations upon the electron microscopic characteristics of acidophil and basiphil cells.

Corticotrophic cells in the rostral zone of the pars intermedia and in the adjacent neurohypophysis of the rat and mouse

1973 ◽  
Vol 136 (1) ◽  
pp. 97-110 ◽  
Author(s):  
M. E. Stoeckel ◽  
H. D. Dellmann ◽  
A. Porte ◽  
M. J. Klein ◽  
F. Stutinsky
Keyword(s):  
Pars Intermedia ◽  
Corticotrophic Cells

Oxytocin-immunoreactive nerve fibers in the pars intermedia of the pituitary in the rabbit and hare

1983 ◽  
Vol 228 (2) ◽  
Author(s):  
S. Schimchowitsch ◽  
M.E. Stoeckel ◽  
M.J. Klein ◽  
J.C. Garaud ◽  
G. Schmitt ◽  
...  
Keyword(s):  
Nerve Fibers ◽  
Pars Intermedia

THE HYPOPHYSIAL PORTAL SYSTEM OF VESSELS IN MAN

1954 ◽  
Vol 39 (3) ◽  
pp. 219-230 ◽  
Author(s):  
G. P. Xuereb ◽  
Marjorie M. L. Prichard ◽  
P. M. Daniel
Keyword(s):  
Portal System ◽  
Hypophysial Portal

Grass carp somatolactin: I. Evidence for PACAP induction of somatolactin-α and -β gene expression via activation of pituitary PAC-I receptors

2008 ◽  
Vol 295 (2) ◽  
pp. E463-E476 ◽  
Author(s):  
Quan Jiang ◽  
Wendy K. W. Ko ◽  
Ethan A. Lerner ◽  
K. M. Chan ◽  
Anderson O. L. Wong
Keyword(s):  
Gene Expression ◽  
Grass Carp ◽  
Primary Cultures ◽  
Single Copy ◽  
Nerve Fibers ◽  
Pars Intermedia ◽  
Pituitary Hormone ◽  
Pituitary Cells ◽  
Mrna Levels ◽  
Rapid Amplification

Somatolactin (SL), the latest member of the growth hormone/prolactin family, is a novel pituitary hormone with diverse functions. At present, SL can be identified only in fish but not in tetrapods and its regulation at the pituitary level has not been fully characterized. Using grass carp as a model, we examined the direct effects of pituitary adenylate cyclase-activating polypeptide (PACAP) on SL secretion and synthesis at the pituitary cell level. As a first step, the structural identity of grass carp SL, SLα and SLβ, was established by 5′/3′-rapid amplification of cDNA ends. These two SL isoforms are single-copy genes and are expressed in two separate populations of pituitary cells located in the pars intermedia. In the carp pituitary, PACAP nerve fibers were detected in the nerve tracts of the neurohypophysis and extended into the vicinity of pituitary cells forming the pars intermedia. In primary cultures of grass carp pituitary cells, PACAP was effective in stimulating SL release, cellular SL content, and total SL production. The increase in SL production also occurred with parallel rises in SLα and SLβ mRNA levels. With the use of a combination of molecular and pharmacological approaches, PACAP-induced SL release and SL gene expression were shown to be mediated by pituitary PAC-I receptors. These findings, as a whole, suggest that PACAP may serve as a hypophysiotropic factor in fish stimulating SL secretion and synthesis at the pituitary level. Apparently, PACAP-induced SL production is mediated by upregulation of SLα and SLβ gene expression through activation of PAC-I receptors.

Immunohistochemical demonstration of corticotrophic cells concentrated in the rostral zone of the pars intermedia of the mouse hypophysis

1973 ◽  
Vol 29 (10) ◽  
pp. 1289-1290 ◽  
Author(s):  
M. E. Stoeckel ◽  
I. Doerr-Schott ◽  
A. Porte ◽  
H. D. Dellmann ◽  
M. P. Dubois
Keyword(s):  
Pars Intermedia ◽  
Immunohistochemical Demonstration ◽  
Corticotrophic Cells
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