Sirt6-mediated epigenetic modification of DNA accessibility is essential for Pou2f3-induced thymic tuft cell development
Thymic epithelial cells (TECs) are essential for the production of self-tolerant T cells. The newly identified thymic tuft cells are regulated by Pou2f3 and represent important elements for host type 2 immunity. However, epigenetic involvement in thymic tuft cell development remains unclear. We perf...
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Published in | Communications biology Vol. 5; no. 1; p. 544 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
London
Nature Publishing Group UK
06.06.2022
Nature Publishing Group Nature Portfolio |
Subjects | |
Online Access | Get full text |
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Summary: | Thymic epithelial cells (TECs) are essential for the production of self-tolerant T cells. The newly identified thymic tuft cells are regulated by
Pou2f3
and represent important elements for host type 2 immunity. However, epigenetic involvement in thymic tuft cell development remains unclear. We performed single-cell ATAC-seq of medullary TEC (mTEC) and established single-cell chromatin accessibility profiling of mTECs. The results showed that mTEC III cells can be further divided into three groups (Late Aire 1, 2, and 3) and that thymic tuft cells may be derived from Late Aire 2 cells.
Pou2f3
is expressed in both Late Aire 2 cells and thymic tuft cells, while
Pou2f3
-regulated genes are specifically expressed in thymic tuft cells with simultaneous opening of chromatin accessibility, indicating the involvement of epigenetic modification in this process. Using the epigenetic regulator
Sirt6
-defect mouse model, we found that
Sirt6
deletion increased Late Aire 2 cells and decreased thymic tuft cells and Late Aire 3 cells without affecting
Pou2f3
expression. However,
Sirt6
deletion reduced the chromatin accessibility of
Pou2f3
-regulated genes in thymic tuft cells, which may be caused by
Sirt6
–mediated regulation of
Hdac9
expression. These data indicate that epigenetic regulation is indispensable for
Pou2f3
-mediated thymic tuft cell development.
Thymic epithelial cells (TECs) are essential for the production of self-tolerant T cells. Single-cell ATAC-seq of medullary TECs suggests that Sirt6-mediated epigenetic regulation may regulate the development of thymic tuft cells from these TECs. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 2399-3642 2399-3642 |
DOI: | 10.1038/s42003-022-03484-9 |