- 著者
-
Shayida MAIMAITI
Ryusuke KOSHIDA
Masami OJIMA
Kaushalya KULATHUNGA
Hisashi OISHI
Satoru TAKAHASHI
- 出版者
- Japanese Association for Laboratory Animal Science
- 雑誌
- Experimental Animals (ISSN:13411357)
- 巻号頁・発行日
- pp.18-0182, (Released:2019-05-16)
- 被引用文献数
-
3
Mammalian postnatal growth is regulated primarily by the growth hormone (GH)/insulin-like growth factor I (IGF-I) axis. MafB is a basic leucine zipper (bZip) transcription factor that has pleiotropic functions. Although MafB plays a critical role in fetal brain development, such as in guidance for hindbrain segmentation, its postnatal role in neurons remains to be elucidated. To investigate this, we used neuron-specific Mafb conditional knockout (cKO) mice. In addition to an approximately 50% neonatal viability, the Mafb cKO mice exhibited growth retardation without apparent signs of low energy intake. Notably, serum IGF-I levels of these mice in the postnatal stage were lower than those of control mice. They seemed to have a neuroendocrine dysregulation, as shown by the upregulation of serum GH levels in the resting state and an inconsistent secretory response of GH upon administration of growth hormone-releasing hormone. These findings reveal that neuronal MafB plays an important role in postnatal development regulated by the GH/IGF-I axis.