Observations on the Acidophil Cells of the Adenohypophysis in Pregnant and Lactating Rabbits

Allanson, M.; Cameron, E. H. D.; Foster, C. L.

doi:10.1530/jrf.0.0120319

Cited by 7 publications

(5 citation statements)

References 10 publications

(9 reference statements)

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“…In a recent paper the light microscopical appearances of the acidophil cells of the adenohypophysis in pregnant and lactating rabbits were described (Allanson, Cameron & Foster, 1966). The present paper extends these observations to the ultrastructural level.…”

Section: Introductionsupporting

confidence: 61%

“…The presence of the nuclear inclusions, presumably identical with those observed by light microscopy in the erythrosinophil cells of the glands of pregnant and lactating rabbits Allanson et al 1966) is of interest. Nuclear invaginations and inclusions have been found in a variety of cells (Kurosumi, 1961;Nicander, 1964).…”

Section: Discussionmentioning

confidence: 69%

“…In addition, thick (0-5 p) sections were cut for light microscopy and stained by the PAS method followed by 1 % toluidine blue in saturated aqueous borax solution. RESULTS Normal virgin female rabbits The gross morphology and distribution of the acidophils have already been de¬ scribed by Allanson et al (1966) as has their ultrastructure by Salazar, 1963, andYoung et al (1965). Five types of cells were described in the pars distalis proper of virgin female rabbits in an earlier paper (Young et al 1966).…”

Section: Introductionmentioning

confidence: 99%

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Ultrastructural Changes in the Adenohypophysis of Pregnant and Lactating Rabbits

Young¹,

Foster²,

Cameron³

1967

Journal of Endocrinology

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Greatly enhanced secretory activity was observed during pregnancy and during lactation in the adenohypophysis ofthe rabbit, in cells similar to those designated type 1 in normal animals. These cells, whose granules were up to 550 m\g=m\ in diameter, showed, under the electron microscope, a very well developed ergastoplasm, an enlarged Golgi region, frequent nuclear inclusions and, during lactation, extensive degranulation. These observations, taken together with the evidence provided by light microscopy (Allanson, , suggest that the type-1 cells are the producers of prolactin.

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Section: Introductionsupporting

confidence: 61%

Section: Discussionmentioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

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Ultrastructural Changes in the Adenohypophysis of Pregnant and Lactating Rabbits

Young¹,

Foster²,

Cameron³

1967

Journal of Endocrinology

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“…It is probable that the chromophobes were originally degranulated prolactin cells. Similar shifts in cell type have also been observed during reproductive stages in the guinea-pig (Kirkman, 1937), rabbit (Allanson, Cameron & Foster, 1966) and human (Swanson & Ezrin, 1960). Farquhar & Wellings (1957) suggested that chromophobes may secrete corticotrophin and Herlant (1964) proposed a third type of acidophil with small granules as a secreting cell type for corticotrophin.…”

Section: Discussionsupporting

confidence: 57%

Changes in Adenohypophysial Cells and Levels of Somatotrophin and Prolactin at Different Reproductive Stages in the Pig

Anderson¹,

Peters²,

Melampy³

et al. 1972

Reproduction

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Percentages of cell types in the adenohypophysis were compared with the content of sth and prolactin at different reproductive stages (e.g. immature, oestrous cycle, pregnancy, lactation and after hysterectomy) in the pig. Acidophils represent sth and prolactin activities. Chromophobes are undifferentiated, inactive or depleted cells.Acidophils represented half (53\m=.\5%) the cell population. Percentages of sth cells were higher in 17-day-old pigs than in mature animals. This is a period of rapid growth in the young pig. During the cycle, during pregnancy and after hysterectomy, the percentages of prolactin cells were higher than those found in immature or lactating pigs.The chromophobes represented 13\m=.\1 % of the cell population. Chromophobes were the predominant cell type during lactation, but these seemingly inactive cells may have been active acidophils that were synthesizing and secreting prolactin. By rapid turnover of hormone, the cytoplasmic granules in prolactin cells lack differentiation.The sth activity was similar in pigs during pregnancy and lactation and after hysterectomy. There were no significant correlations in the percentages of sth cells and the concentration or content of sth during pregnancy and lactation. There was a trend of increased percentages of prolactin cells in later stages of pregnancy and after hysterectomy. Exogenous oestrogen caused a marked increase in the pituitary content of sth and prolactin in hysterectomized pigs as compared with uninjected hysterectomized animals. Prolactin levels remained relatively constant during pregnancy and after hysterectomy, but declined during lactation. Exogenous oestrogen caused a consistently higher trend in prolactin activity in hysterectomized animals.

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“…Selected sections were stained by the following techniques : (a) periodic acid Schiff-orange G (PAS/OG); performic acid-alcian blue-PAS-orange G according to Adams & Pearse (1959) (PAAB/ PAS/OG) ; Herlant's tetrachrome stain (Herlant, 1960) ; aldehyde fuchsin-orange G according to Elftman (1959) but with preliminary oxidation in Lugol's iodine instead of the permanganate-sulphuric acid mixture used by Elftman; Lux01 blue (Shanklin, Nassar & Issidorides, 1959) combined with orange G and acid fuchsin according to Slidders (1961); Cleveland & Wolfe's trichrome stain as modified by Allanson, Cameron & Foster (1966). In order to determine the tinctorial affinities of the several cell types of the pars distalis, when treated by each of the staining procedures listed above, all the cells in several fields of a Cleveland-Wolfe trichrome preparation were drawn under an oil immersion lens, with the aid of a camera lucida, and the staining reactions of the cells noted.…”

Section: Staining Methodsmentioning

confidence: 99%

Observations on the pituitary gland of some members of the suborder Suiformes (Mammalia: Artiodactyla)

Allanson

1971

Journal of Zoology

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The macroscopical and microscopical anatomy of the pituitary gland of the warthog (Phacochoerus aethiopicus) is described and compared with that of the Vietnam pig (a domestic race of Sus scrofa). The glands of the two animals differ considerably in shape but agree in anatomical details. The morphological and histochemical characteristics of cells of the pars distalis are described in the warthog, bush pig (Potamochoerus porcus), Vietnam pig (all members of the family Suidae) and hippopotamus (Hippopotamus amphibius: Hippopotamidae). Close agreement was found between five cell types of the warthog and bush pig and the corresponding cell types in the domestic pig. The mucoid cells of the less closely related hippopotamus differed from those of the domestic pig in some morphological details.

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Observations on the Acidophil Cells of the Adenohypophysis in Pregnant and Lactating Rabbits

Cited by 7 publications

References 10 publications

Ultrastructural Changes in the Adenohypophysis of Pregnant and Lactating Rabbits

Ultrastructural Changes in the Adenohypophysis of Pregnant and Lactating Rabbits

Changes in Adenohypophysial Cells and Levels of Somatotrophin and Prolactin at Different Reproductive Stages in the Pig

Observations on the pituitary gland of some members of the suborder Suiformes (Mammalia: Artiodactyla)

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