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Basal lamina remodeling at the skeletal muscle stem cell niche mediates stem cell self-renewal
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Basal lamina remodeling at the skeletal muscle stem cell niche mediates stem cell self-renewal
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Journal Article
Basal lamina remodeling at the skeletal muscle stem cell niche mediates stem cell self-renewal
2018
Overview
A central question in stem cell biology is the relationship between stem cells and their niche. Although previous reports have uncovered how signaling molecules released by niche cells support stem cell function, the role of the extra-cellular matrix (ECM) within the niche is unclear. Here, we show that upon activation, skeletal muscle stem cells (satellite cells) induce local remodeling of the ECM and the deposition of laminin-α1 and laminin-α5 into the basal lamina of the satellite cell niche. Genetic ablation of laminin-α1, disruption of integrin-α6 signaling or blocking matrix metalloproteinase activity impairs satellite cell expansion and self-renewal. Collectively, our findings establish that remodeling of the ECM is an integral process of stem cell activity to support propagation and self-renewal, and may explain the effect laminin-α1-containing supports have on embryonic and adult stem cells, as well as the regenerative activity of exogenous laminin-111 therapy.
Extracellular matrix (ECM) remodelling is thought to have effects on muscle stem cells that support muscle homeostasis. Here the authors show ECM remodeling controls satellite cell self-renewal through deposition of laminin-α1 into the satellite cell niche.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 13/100
/ 13/106
/ 13/51
/ 14/63
/ 38
/ 38/88
/ 64
/ 64/60
/ Animals
/ Basement Membrane - cytology
/ Basement Membrane - metabolism
/ Cell Differentiation - physiology
/ Cell Self Renewal - physiology
/ Extracellular Matrix - metabolism
/ Humanities and Social Sciences
/ Humans
/ Laminin
/ Muscle Fibers, Skeletal - cytology
/ Muscle Fibers, Skeletal - metabolism
/ Muscle, Skeletal - metabolism
/ Muscles
/ Satellite Cells, Skeletal Muscle - cytology
/ Satellite Cells, Skeletal Muscle - metabolism
/ Science
