Cell lineage decisions during development require strict gene regulation by complex networks of multiple transcription factors and collaborating factors. During fate decisions, key transcription factors (TFs) drive precursors into one lineage while inactivating """"""""alternative fate genes"""""""". Silenced states of a subset of """"""""alternativ fate genes"""""""" are heritably maintained through epigenetic silencing. Epigenetic silencing is globally important for normal cell development and commonly altered in many types of cancers. Establishment of epigenetic silencing involves recruitment of enzyme activities mediating repressive histone methylation and DNA methylation. These enzyme activities are thought to be delivered by specific sets of TFs in a locus- specific manner. However, the mechanisms by which these TFs drive cel fate decisions and then establish epigenetic silencing are not completely understood. In this proposal, we will study crosstalk between key TFs driving T cell lineage choices and epigenetic modifiers that ultimately establish cell lineage identities. T lymphocyte development is an excellent system to tackle these questions because of our strong background knowledge on developmental processes and requirements for TFs. Specifically, we will study functions of Runx transcription factors in gene repression in the context of fate decisions and epigenetic silencing of """"""""alternative fate genes"""""""". Our efforts will be focused on study of functional collaborations between Runx proteins and their interacting factors that drive and stabilize the fate choice processes. Because Runx proteins are involved in normal development of many cell types, and their functions are frequently altered in leukemia, knowledge obtained through our study of Runx-mediated genetic and epigenetic regulation during T cell development would provide substantial insights into stable gene regulation mechanisms widely used in many cell types as well as altered genetic programs causing cancers.

Public Health Relevance

Diverse cell types are continuously generated from stem/progenitor cells to maintain functional cell compartments. During cell differentiation, a specific set of genes is turned-on or -off by transcription factors, and these distinct states of gene expression are stably maintained. In this study, I propose to investigate the gene regulatory mechanisms that are critical for maintaining cell type diversity in animals and humans.

National Institute of Health (NIH)
National Institute of Allergy and Infectious Diseases (NIAID)
Research Project (R01)
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Cellular and Molecular Immunology - B Study Section (CMIB)
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Prabhudas, Mercy R
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Washington University
Schools of Medicine
Saint Louis
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Perry, Justin S A; Russler-Germain, Emilie V; Zhou, You W et al. (2018) CD36 Mediates Cell-Surface Antigens to Promote Thymic Development of the Regulatory T Cell Receptor Repertoire and Allo-tolerance. Immunity 48:923-936.e4
Verbaro, Daniel J; Sakurai, Nagisa; Kim, Byungil et al. (2018) Cutting Edge: The Histone Methyltransferase G9a Is Required for Silencing of Helper T Lineage-Associated Genes in Proliferating CD8 T Cells. J Immunol 200:3891-3896
Raju, Saravanan; Kometani, Kohei; Kurosaki, Tomohiro et al. (2018) The adaptor molecule CD2AP in CD4 T cells modulates differentiation of follicular helper T cells during chronic LCMV infection. PLoS Pathog 14:e1007053
Etzensperger, Ruth; Kadakia, Tejas; Tai, Xuguang et al. (2017) Identification of lineage-specifying cytokines that signal all CD8+-cytotoxic-lineage-fate 'decisions' in the thymus. Nat Immunol 18:1218-1227
Inoue, Takeshi; Shinnakasu, Ryo; Ise, Wataru et al. (2017) The transcription factor Foxo1 controls germinal center B cell proliferation in response to T cell help. J Exp Med 214:1181-1198
Kojo, Satoshi; Tanaka, Hirokazu; Endo, Takaho A et al. (2017) Priming of lineage-specifying genes by Bcl11b is required for lineage choice in post-selection thymocytes. Nat Commun 8:702
Iwata, Arifumi; Durai, Vivek; Tussiwand, Roxane et al. (2017) Quality of TCR signaling determined by differential affinities of enhancers for the composite BATF-IRF4 transcription factor complex. Nat Immunol 18:563-572
Chou, Chun; Verbaro, Daniel J; Tonc, Elena et al. (2016) The Transcription Factor AP4 Mediates Resolution of Chronic Viral Infection through Amplification of Germinal Center B Cell Responses. Immunity 45:570-582
Ebihara, Takashi; Song, Christina; Ryu, Stacy H et al. (2015) Runx3 specifies lineage commitment of innate lymphoid cells. Nat Immunol 16:1124-33
Collins, Patrick L; Kyle, Katherine E; Egawa, Takeshi et al. (2015) The histone methyltransferase SETDB1 represses endogenous and exogenous retroviruses in B lymphocytes. Proc Natl Acad Sci U S A 112:8367-72

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