Determining the mechanisms of normal cell cycle control is critical for our understanding of both development and oncogenesis. During development, cell proliferation occurs by coordinating progress through the cell cycle with growth. Conversely, cell cycle arrest occurs prior to, and is often necessary for, terminal differentiation. Cell proliferation and cell cycle arrest are also highly regulated after the completion of development: stem cells in adult tissues are under tight cell cycle control, as are quiescent cells that only proliferate in response to particular stimuli. Breakdowns in cell cycle control in any of these circumstances can have drastic consequences and contribute to the deregulated growth typical of cancer. The long term objective of this project is to elucidate how developmental programs affect cell cycle progression, a process that remains poorly understood. In this proposal we focus on gene expression mechanisms that control the G1-S transition because this is when most cells decide whether to enter or to exit the cell cycle.

Public Health Relevance

Cell proliferation is a fundamental aspect of the biology of all organisms, and is controlled by a highly orchestrated series of cell biological events termed the cell cycle that directs the accurate duplication and inheritance of the genome. A detailed molecular description of cell cycle events during animal development is critical for our understanding of cell proliferation control, and how such control goes awry in diseases like cancer.

National Institute of Health (NIH)
National Institute of General Medical Sciences (NIGMS)
Research Project (R01)
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Cellular Signaling and Regulatory Systems Study Section (CSRS)
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Hoodbhoy, Tanya
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University of North Carolina Chapel Hill
Schools of Arts and Sciences
Chapel Hill
United States
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Meserve, Joy H; Duronio, Robert J (2018) Fate mapping during regeneration: Cells that undergo compensatory proliferation in damaged Drosophila eye imaginal discs differentiate into multiple retinal accessory cell types. Dev Biol 444:43-49
Meserve, Joy H; Duronio, Robert J (2017) A population of G2-arrested cells are selected as sensory organ precursors for the interommatidial bristles of the Drosophila eye. Dev Biol 430:374-384
Swanson, Christina I; Meserve, Joy H; McCarter, Patrick C et al. (2015) Expression of an S phase-stabilized version of the CDK inhibitor Dacapo can alter endoreplication. Development 142:4288-98
Meserve, Joy H; Duronio, Robert J (2015) Scalloped and Yorkie are required for cell cycle re-entry of quiescent cells after tissue damage. Development 142:2740-51
McKay, Daniel J; Klusza, Stephen; Penke, Taylor J R et al. (2015) Interrogating the function of metazoan histones using engineered gene clusters. Dev Cell 32:373-86
Salzler, Harmony R; Tatomer, Deirdre C; Malek, Pamela Y et al. (2013) A sequence in the Drosophila H3-H4 Promoter triggers histone locus body assembly and biosynthesis of replication-coupled histone mRNAs. Dev Cell 24:623-34
Fox, Donald T; Duronio, Robert J (2013) Endoreplication and polyploidy: insights into development and disease. Development 140:3-12
Meserve, Joy H; Duronio, Robert J (2012) Atypical E2Fs drive atypical cell cycles. Nat Cell Biol 14:1124-5
Duronio, Robert J (2012) Developing S-phase control. Genes Dev 26:746-50
Sloan, Roketa S; Swanson, Christina I; Gavilano, Lily et al. (2012) Characterization of null and hypomorphic alleles of the Drosophila l(2)dtl/cdt2 gene: Larval lethality and male fertility. Fly (Austin) 6:173-83

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