Journal
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
Volume 9, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fcell.2021.671029
Keywords
Tle4; osteoblast; Runx2; bone mineralization; Tle4-Runx axis; bone calcification
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Funding
- National Institutes of Health [R01 CA115772]
- Swim Across America
- Hill Family Fund for the Diagnosis and Management of Rare and Undiagnosed Diseases at Mass General
- Eunice Kennedy Shriver National Institute of Child Health and Human Development of the National Institutes of Health [R03HD099516]
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This study identified a previously unrecognized role of Tle4 in bone calcification and investigated its impact on osteoblast function. Loss of Tle4 was shown to adversely affect bone development, potentially through regulation of key osteoblastogenic genes.
Healthy bone homeostasis hinges upon a delicate balance and regulation of multiple processes that contribute to bone development and metabolism. While examining hematopoietic regulation by Tle4, we have uncovered a previously unappreciated role of Tle4 on bone calcification using a novel Tle4 null mouse model. Given the significance of osteoblasts in both hematopoiesis and bone development, this study investigated how loss of Tle4 affects osteoblast function. We used dynamic bone formation parameters and microCT to characterize the adverse effects of Tle4 loss on bone development. We further demonstrated loss of Tle4 impacts expression of several key osteoblastogenic genes, including Runx2, Oc, and Ap, pointing toward a potential novel mechanism for Tle4-dependent regulation of mammalian bone development in collaboration with the RUNX family members.
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