Qki deficiency maintains stemness of glioma stem cells in suboptimal environment by downregulating endolysosomal degradation

Takashi Shingu, Allen L. Ho, Liang Yuan, Xin Zhou, Congxin Dai, Siyuan Zheng, Qianghu Wang, Yi Zhong, Qing Chang, James W. Horner, Brandon D. Liebelt, Yu Yao, Baoli Hu, Yiwen Chen, Gregory N. Fuller, Roeland G.W. Verhaak, Amy B. Heimberger, Jian Hu

Research output: Contribution to journalArticle

31 Scopus citations

Abstract

Stem cells, including cancer stem cells (CSCs), require niches to maintain stemness, yet it is unclear how CSCs maintain stemness in the suboptimal environment outside their niches during invasion. Postnatal co-deletion of Pten and Trp53 in mouse neural stem cells (NSCs) leads to the expansion of these cells in their subventricular zone (SVZ) niches but fails to maintain stemness outside the SVZ. We discovered that Qki is a major regulator of NSC stemness. Qk deletion on a Pten-/-; Trp53-/- background helps NSCs maintain their stemness outside the SVZ in Nes-CreERT2; QkL/L; PtenL/L; Trp53L/L mice, which develop glioblastoma with a penetrance of 92% and a median survival time of 105 d. Mechanistically, Qk deletion decreases endolysosome-mediated degradation and enriches receptors essential for maintaining self-renewal on the cytoplasmic membrane to cope with low ligand levels outside niches. Thus, downregulation of endolysosome levels by Qki loss helps glioma stem cells (GSCs) maintain their stemness in suboptimal environments outside their niches.

Original languageEnglish (US)
Pages (from-to)75-86
Number of pages12
JournalNature Genetics
Volume49
Issue number1
DOIs
StatePublished - Jan 1 2017
Externally publishedYes

ASJC Scopus subject areas

  • Genetics

Fingerprint Dive into the research topics of 'Qki deficiency maintains stemness of glioma stem cells in suboptimal environment by downregulating endolysosomal degradation'. Together they form a unique fingerprint.

Cite this