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A quiescent cell population replenishes mesenchymal stem cells to drive accelerated growth in mouse incisors
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A quiescent cell population replenishes mesenchymal stem cells to drive accelerated growth in mouse incisors
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Journal Article
A quiescent cell population replenishes mesenchymal stem cells to drive accelerated growth in mouse incisors
2018
Overview
The extent to which heterogeneity within mesenchymal stem cell (MSC) populations is related to function is not understood. Using the archetypal MSC in vitro surface marker, CD90/Thy1, here we show that 30% of the MSCs in the continuously growing mouse incisor express CD90/Thy1 and these cells give rise to 30% of the differentiated cell progeny during postnatal development. In adulthood, when growth rate homeostasis is established, the CD90/Thy1
+
MSCs decrease dramatically in number. When adult incisors are cut, the growth rate increases to rapidly re-establish tooth length and homeostasis. This accelerated growth rate correlates with the re-appearance of CD90/Thy
+
MSCs and re-establishment of their contribution to cell differentiation. A population of Celsr1
+
quiescent cells becomes mitotic following clipping and replenishes the CD90/Thy1 population. A sub-population of MSCs thus exists in the mouse incisor, distinguished by expression of CD90/Thy1 that plays a specific role only during periods of increased growth rate.
Mouse incisors constantly renew from a slow cycling population of mesenchymal stem cells. Here, the authors show that upon cutting of adult incisors, a sub-population of dental mesenchymal stem cells reactivates, allowing an increased growth rate and rapid regeneration.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 13/100
/ 13/31
/ 14
/ 14/1
/ 14/19
/ 45
/ 631/136
/ 64
/ 64/60
/ Animals
/ Humanities and Social Sciences
/ Incisor - growth & development
/ Incisors
/ Mesenchymal Stem Cells - cytology
/ Mesenchymal Stem Cells - metabolism
/ Mice
/ Mitosis
/ Progeny
/ Receptors, G-Protein-Coupled - genetics
/ Receptors, G-Protein-Coupled - metabolism
/ Science
/ Teeth
