香港六合彩

Publication in J Cell Sci for Agathe Chaigne and colleagues

How do cells control spindle positioning in three-dimensional environments?听A new 产测听Agathe Chaigne and colleagues reveals three-dimensional geometry controls division symmetry in stem cell colonies.听The study uses听mouse embryonic stem cells as a model听system and finds that they can divide asymmetrically in size (one cell bigger than the other).听This assymetry is controlled by the geometry of the colony, as cells at the border of a ball of cells divide assymetrically this more often than cells inside the ball. The mechanism appears to听be controlled by E-Cadherin, a component of cell-cell junctions. Interestingly, when the听cells change fate towards differentiation, they divide more symmetrically, suggesting that controlling division size fidelity is more important in differentiated cells than stem cells.

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