ISSN 1662-4009 (online)

ey0019.1-4 | Basic Science and Stem Cells | ESPEYB19

1.4. Pituitary stem cells produce paracrine WNT signals to control the expansion of their descendant progenitor cells

P Russell John , Lim Xinhong , Santambrogio Alice , Yianni Val , Kemkem Yasmine , Wang Bruce , Fish Matthew , Haston Scott , Grabek Anae¨lle , Hallang Shirleen , J Lodge Emily , L Patist Amanda , Schedl Andreas , Mollard Patrice , Nusse Roel , Andoniadou Cynthia L

Elife. 2021 Jan. 10:e59142. doi: https://doi.org/10.7554/eLife.59142.Brief Summary: The authors studied genetic mice models to show that pituitary stem cells can secrete WNT ligands to their committed progeny and promote their expansion.The anterior pituitary contains a population of Sox2 expressing stem cells (Sox2+ PSCs), which self-renew and give rise to lineage...

ey0021.3-3 | Hypothalamus-Pituitary-Axis Regulation | ESPEYB21

3.3. TSH pulses finely tune thyroid hormone release and TSH receptor transduction

Guillou Anne , Kemkem Yasmine , Lafont Chrystel , Fontanaud Pierre , Calebiro Davide , Campos Pauline , Bonnefont Xavier , Fiordelisio-Coll Tatiana , Wang Ying , Brule Emilie , Bernard Daniel J , Tissier Paul Le , Steyn Frederik , Mollard Patrice

Brief Summary: This study examined the pulsatile secretion of TSH and its regulatory role in thyroid hormone (TH) synthesis in mice. Using a novel ultra-sensitive ELISA for mouse TSH, it shows that TSH pulsatility plays a critical role in regulating thyroid function.In addition to mapping the normal TSH secretion pattern in healthy mice, and the secretion pattern in a mouse model of disease (mouse made hypothyroid by an iodine-deficient diet enriched wit...