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TET2 Regulates Mast Cell Differentiation and Proliferation through Catalytic and Non-catalytic Activities.

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Mus musculus

PROVIDER: GSE77845 | GEO | 2016/05/04

SECONDARY ACCESSION(S): PRJNA311719

REPOSITORIES: GEO

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TET2 Regulates Mast Cell Differentiation and Proliferation through Catalytic and Non-catalytic Activities.

Project description: Not available

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TET2 Regulates Mast Cell Differentiation and Proliferation through Catalytic and Non-catalytic Activities.

Project description:Dioxygenases of the TET family impact genome functions by converting 5-methylcytosine in DNA to 5-hydroxymethylcytosine (5hmC), but their contribution to differentiation and function of immune cells is still incompletely understood. Here, we identified TET2 as a crucial regulator of mast cell differentiation and proliferation. Specifically, mast cell differentiation was impaired in absence of TET2, a defect that could be however compensated or further exacerbated modulating the activity of other TET family members. Mechanistically, delayed mast cell differentiation was related to the dysregulated expression of C/EBP transcription factors. Vice versa, the marked increase in proliferation induced by the absence of TET2 could be rescued exclusively by the specific re-expression of TET2 itself, regardless of its enzymatic activity. Our data indicate that in absence of TET2, mast cell differentiation is largely under the control of compensatory mechanisms mediated by other TET family members, while proliferation is strictly dependent on TET2 expression.

2016-05-04 | GSE77844 | GEO

TET2 Regulates Mast Cell Differentiation and Proliferation through Catalytic and Non-catalytic Activities.

Project description:Dioxygenases of the TET family impact genome functions by converting 5-methylcytosine in DNA to 5-hydroxymethylcytosine, but the individual contribution of the three family members to differentiation and function of myeloid cells is still incompletely understood. Using cells with a deletion in the Tet2 gene, we show that TET2 contributes to the regulation of mast cell differentiation, proliferation and effector functions. The differentiation defect observed in absence of TET2 could be however completely rescued or further exacerbated by modulating TET3 activity, and it was primarily linked to dysregulated expression of the C/EBP family of transcription factors. In contrast, hyper-proliferation induced by the lack of TET2 could not be modified by TET3. Together, our data indicate the existence of both overlapping and unique roles of individual TET proteins in regulating myeloid cell gene expression, proliferation and function.

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TET2 Regulates Mast Cell Differentiation and Proliferation through Catalytic and Non-catalytic Activities.

Project description:Dioxygenases of the TET family impact genome functions by converting 5-methylcytosine (5mC) in DNA to 5-hydroxymethylcytosine (5hmC). Here, we identified TET2 as a crucial regulator of mast cell differentiation and proliferation. In the absence of TET2, mast cells showed disrupted gene expression and altered genome-wide 5hmC deposition, especially at enhancers and in proximity of down-regulated genes. Impaired differentiation of Tet2-ablated cells could be compensated or further exacerbated by modulating the activity of other TET family members, and mechanistically it could be linked to the dysregulated expression of C/EBP family transcription factors. Conversely, the marked increase in proliferation induced by the loss of TET2 could be rescued exclusively by re-expression of wild-type or catalytically inactive TET2. Our data indicate that in the absence of TET2, mast cell differentiation is under the control of compensatory mechanisms mediated by other TET family members, while proliferation is strictly dependent on TET2 expression.

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TET2 Regulates Mast Cell Differentiation and Proliferation through Catalytic and Non-catalytic Activities.

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