In vivo time-lapse imaging and analysis of mitochondria in neural progenitor cells in the developing brain

Author:

Feng Martin S.,Kettelberger Maggie R.,Bestman Jennifer E.ORCID

Abstract

ABSTRACTNeural progenitor cells (NPCs) are the highly polarized dividing stem cells of the developing brain that give rise to all neurons and glia. Early on, NPCs divide symmetrically and expand the pool of progenitor cells, but as development continues the NPCs begin to asymmetrically divide to produce neurons. The mechanisms that govern this irreversible commitment to neurogenesis are not fully understood, but in other stem cell populations the regulation of mitochondria and cell metabolism is key to controlling stem cell fate. Here we use timelapse 3D confocal microscopy to observe NPCs, their cellular progeny, and their mitochondria in the developingXenopustectum. Our results track individual NPCs over days and show that they contain abundant mitochondria that form complicated networks distributed throughout the cells. We find that NPCs preparing to divide shift mitochondria toward the cell body where they become asymmetrically distributed, suggesting that the cells control which progeny inherit mitochondria. This uneven distribution of mitochondria in cell preparing to divide led us to test the role that mitochondria play in cell division. We overexpressed the mitochondrial biogenesis master regulator, PGC-1a, which induced the NPCs to asymmetrically divide and produce neurons, while PGC-1a knockdown limited neurogenesis. Together these data suggest that the regulation of mitochondria by NPCs prior to cell division and their unequal inheritance during cell division, contributes to the fate of the newborn cells in the developing brain.

Publisher

Cold Spring Harbor Laboratory

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3