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Dev Cell June 8, 2015; 33 (5): 562-75.
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Dynein-Based Accumulation of Membranes Regulates Nuclear Expansion in Xenopus laevis Egg Extracts.

Hara Y , Merten CA .

Nuclear size changes dynamically during development and has long been observed to correlate with the space surrounding the nucleus, as well as with the volume of the cell. Here we combine an in vitro cell-free system of Xenopus laevis egg extract with microfluidic devices to systematically analyze the effect of spatial constraints. The speed of nuclear expansion depended on the available space surrounding the nucleus up to a threshold volume in the nanoliter range, herein referred to as the nuclear domain. Under spatial constraints smaller than this nuclear domain, the size of microtubule-occupied space surrounding the nucleus turned out to be limiting for the accumulation of membranes around the nucleus via the motor protein dynein, therefore determining the speed of nuclear expansion. This mechanism explains how spatial information surrounding the nucleus, such as the positioning of the nucleus inside the cell, can control nuclear expansion.

PubMed ID: 26004509
Article link: Dev Cell

Species referenced: Xenopus laevis
Genes referenced: dctn2

Article Images: [+] show captions
References :
Good, Turn Up the Volume: Uncovering Nucleus Size Control Mechanisms. 2015, Pubmed, Xenbase