Research Project
Grant-in-Aid for Scientific Research (C)
In the mammalian cerebral cortex, neurons are generated in the ventricular zone and subventricular zone (SVZ). One of the most striking features of fetal human brain is enlargement of SVZ, in which there are special neural progenitors called basal radial glia (bRG) and they are thought to contribute to produce enormous productions of cortical neurons and to acquire the huge brain. In this study, we have identified a gene, JA1, as a potential regulator of bRG production. We clarified (1) JA1 is a positive regulator of bRG production, (2) JA1 is expressed in the bRG itself, (3) and the transcription activity of human regulatory region of JA1 is higher than that of mouse. We identified the responsible region for this difference between human and mouse in intron #1~2. Given the amino acid sequences of JA1 are highly conserved among mammalians, the evolution of regulatory region is thought to be a key to acquire the huge brain in human.
本研究課題では、ヒトの高度な精神活動の基盤となる巨大脳がいかに進化的に獲得されたかを探索した。先行研究では進化的にヒトで新たに獲得された遺伝子の関与が示唆されたが、本研究ではアミノ酸をコードしない転写調節領域の進化の重要性を解明した点でユニークである。また、本研究で注目したJA1転写調節領域にはヒトの小頭症原因遺伝子の結合配列があり、今後、神経発達障害の病態理解への貢献が期待される。
All 2019 2018 2017 2016
All Journal Article (14 results) (of which Int'l Joint Research: 2 results, Peer Reviewed: 14 results, Open Access: 9 results, Acknowledgement Compliant: 1 results) Presentation (8 results) (of which Int'l Joint Research: 1 results, Invited: 5 results)
Sci. Rep.
Volume: 9 Issue: 1 Pages: 5874-5874
10.1038/s41598-019-42390-9
Cell Reports
Volume: 29 Issue: 5 Pages: 1113-1129
10.1016/j.celrep.2019.09.048
ACTA HISTOCHEMICA ET CYTOCHEMICA
Volume: 51 Issue: 3 Pages: 119-128
10.1267/ahc.18009
130007411561
Cerebral Cortex
Volume: 160 Issue: 9 Pages: 721-721
10.1093/cercor/bhy253
Developmental Neuroscience
Volume: 40 Issue: 3 Pages: 278-287
10.1159/000492271
Biochemical and Biophysical Research Communications
Volume: 495 Issue: 1 Pages: 388-394
10.1016/j.bbrc.2017.11.021
Journal of Neuroscience Research
Volume: 96 Issue: 5 Pages: 789-802
10.1002/jnr.24194
Acta Neuropathologica Communications
Volume: 5 Issue: 1 Pages: 92-92
10.1186/s40478-017-0498-5
Development
Volume: 144 Issue: 18 Pages: 3303-3314
10.1242/dev.154013
J Neurosci.
Volume: 37(15) Issue: 15 Pages: 4046-4064
10.1523/jneurosci.3319-16.2017
Sci Rep.
Volume: 7 Issue: 1 Pages: 43945-43945
10.1038/srep43945
Volume: 144 Issue: 3 Pages: 385-399
10.1242/dev.136382
J. Neurochem.
Volume: 140 Issue: 1 Pages: 82-95
10.1111/jnc.13878
Sci Rep
Volume: 6 Issue: 1 Pages: 30805-30805
10.1038/srep30805