English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The theta celles advocated by Sano ('58) as an independent cell type in the mouse anterior pituitary begin to appear about the time of sexual maturity in females and are frequently found from 60 days of age onward (Y a m a d a, Sano and I t o, '57). These cells, mereover, show a definite fluctuation in percentage with the oestrous cycle (S a n o, '58), while in male pituitaries theta cells are almost not found throughout the lifespan of mice, from birth to maturity. In the light of the results of other physiological and experimental studies, of pregnancy (K a t o, '56), lactation (Y a m a da, Sano, Kato and Mi zu tan i, '56), ovariectomy (S a n o, T a w a d a and Y o s h i d a, '59), estrogen administration (I e d a, '59) and progesterone treatment (Y a m a ha t a, unpublished data), it was assumed that theta cells are intimately associated with an ovarian function, especially with a corpus luteum function and that these cells seem to secrete a hormone which regulates the corpus luteum function. In addition, these observations suggest that the presence of theta cells in physiological conditions may imply a sexually maturing state in the mouse. In order to clarify the functional significance of this cell type, changes in theta cells of progesterone administered mature mice were examined.

Effects of progesterone administration on the theta cell of the mouse anterior pituitary