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Title: Trithorax maintains the functional heterogeneity of neural stem cells through the transcription factor Buttonhead

Abstract

The mechanisms that maintain the functional heterogeneity of stem cells, which generates diverse differentiated cell types required for organogenesis, are not understood. In this study, we report that Trithorax (Trx) actively maintains the heterogeneity of neural stem cells (neuroblasts) in the developing Drosophila larval brain. trx mutant type II neuroblasts gradually adopt a type I neuroblast functional identity, losing the competence to generate intermediate neural progenitors (INPs) and directly generating differentiated cells. Trx regulates a type II neuroblast functional identity in part by maintaining chromatin in the buttonhead (btd) locus in an active state through the histone methyltransferase activity of the SET1/MLL complex. Consistently, btd is necessary and sufficient for eliciting a type II neuroblast functional identity. Furthermore, over-expression of btd restores the competence to generate INPs in trx mutant type II neuroblasts. Thus, Trx instructs a type II neuroblast functional identity by epigenetically promoting Btd expression, thereby maintaining neuroblast functional heterogeneity.

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. Univ. of Michigan Medical School, Ann Arbor, MI (United States)
Publication Date:
Research Org.:
Univ. of Washington, Seattle, WA (United States); Univ. of Michigan Medical School, Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Japan Society for the Promotion of Science (JSPS); National Institutes of Health (NIH); National Institute of General Medical Sciences (NIGMS)
OSTI Identifier:
1628818
Grant/Contract Number:  
FG02-00ER41132; T32-GM007315; R01-GM092818
Resource Type:
Accepted Manuscript
Journal Name:
eLife
Additional Journal Information:
Journal Volume: 3; Journal ID: ISSN 2050-084X
Publisher:
eLife Sciences Publications, Ltd.
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; Life Sciences & Biomedicine - Other Topics; Research Article; Stem Cells And Regenerative Medicine; Neuroblast; Neural Stem Cell; Trithorax; Larval Brain; Intermediate Neural Progenitor

Citation Formats

Komori, Hideyuki, Xiao, Qi, Janssens, Derek H., Dou, Yali, and Lee, Cheng-Yu. Trithorax maintains the functional heterogeneity of neural stem cells through the transcription factor Buttonhead. United States: N. p., 2014. Web. doi:10.7554/elife.03502.
Komori, Hideyuki, Xiao, Qi, Janssens, Derek H., Dou, Yali, & Lee, Cheng-Yu. Trithorax maintains the functional heterogeneity of neural stem cells through the transcription factor Buttonhead. United States. https://doi.org/10.7554/elife.03502
Komori, Hideyuki, Xiao, Qi, Janssens, Derek H., Dou, Yali, and Lee, Cheng-Yu. Mon . "Trithorax maintains the functional heterogeneity of neural stem cells through the transcription factor Buttonhead". United States. https://doi.org/10.7554/elife.03502. https://www.osti.gov/servlets/purl/1628818.
@article{osti_1628818,
title = {Trithorax maintains the functional heterogeneity of neural stem cells through the transcription factor Buttonhead},
author = {Komori, Hideyuki and Xiao, Qi and Janssens, Derek H. and Dou, Yali and Lee, Cheng-Yu},
abstractNote = {The mechanisms that maintain the functional heterogeneity of stem cells, which generates diverse differentiated cell types required for organogenesis, are not understood. In this study, we report that Trithorax (Trx) actively maintains the heterogeneity of neural stem cells (neuroblasts) in the developing Drosophila larval brain. trx mutant type II neuroblasts gradually adopt a type I neuroblast functional identity, losing the competence to generate intermediate neural progenitors (INPs) and directly generating differentiated cells. Trx regulates a type II neuroblast functional identity in part by maintaining chromatin in the buttonhead (btd) locus in an active state through the histone methyltransferase activity of the SET1/MLL complex. Consistently, btd is necessary and sufficient for eliciting a type II neuroblast functional identity. Furthermore, over-expression of btd restores the competence to generate INPs in trx mutant type II neuroblasts. Thus, Trx instructs a type II neuroblast functional identity by epigenetically promoting Btd expression, thereby maintaining neuroblast functional heterogeneity.},
doi = {10.7554/elife.03502},
journal = {eLife},
number = ,
volume = 3,
place = {United States},
year = {Mon Oct 06 00:00:00 EDT 2014},
month = {Mon Oct 06 00:00:00 EDT 2014}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Table 1 Table 1: Summary of the marker expression profile in various genetic backgrounds

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Works referencing / citing this record:

Dynamics of activating and repressive histone modifications in Drosophila neural stem cell lineages and brain tumors
journal, August 2019

  • Abdusselamoglu, Merve Deniz; Landskron, Lisa; Bowman, Sarah K.
  • Development
  • DOI: 10.1101/724039

Dynamics of activating and repressive histone modifications in Drosophila neural stem cell lineages and brain tumors
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  • Abdusselamoglu, Merve Deniz; Landskron, Lisa; Bowman, Sarah K.
  • Development, Vol. 146, Issue 23
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Proliferation control in neural stem and progenitor cells
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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.