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New players in the regulation of DNA replication fork speed

Objective

Faithful eucaryotic cell division requires spatio-temporal orchestration of multiple sequential events. Among the crucial steps to providing the daughter cells with identical set of chromosomes is the DNA replication. During this phase, cells coordinate the speed of DNA synthesis with the length of the cell cycle to ensure genome integrity. To do so, growth factors and metabolic signals are integrated primarily by D-type Cyclins. Indeed. their deregulation can directly lead to some of the hallmarks of cancer by causing proliferation that is independent of normal extracellular cues. We previously demonstrated that aberrant accumulation of Cyclin D1 results in a faster cell cycle, with uncontrolled speed of DNA replication fork progression and genome instability (Maiani & Milletti et al., 2021). Despite, frequently altered in many tumors (Musgrove et al., 2011), a unifying theory that clarify how Cyclin D1 promote cancer transformation is still lacking. In the lab of Prof. Jiri Bartek, it was previously shown that PARP1 inhibition increases replication fork speed (Maya-Mendoza et al., 2018). PARP1i uncouples the leading and lagging DNA synthesis resulting in fast fork speed and genome instability. However, it is currently unknown whether the aberrant accumulation of Cyclin D1 has similar effect on DNA synthesis as PARPi. Furthermore, it is also undetermined whether aberrant levels of Cyclin D1 could trigger metabolic changes that accelerate the speed of DNA synthesis. Taking advantage of our previous observations, we aim with this proposal to: i) identify metabolic signatures that can predict dis-regulated DNA synthesis in response to cell cycle alterations; ii) define the molecular mechanism of how cyclin D1 accumulation induces accelerated fork speed; iii) identify new metabolic genes involved in the control of S phase progression and the speed of DNA synthesis by CRISPR-Cas9 screening technology; iv) suggest druggable targets that could be used in cancer therapy.

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HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

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(opens in new window) HORIZON-MSCA-2022-PF-01

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Coordinator

KRAEFTENS BEKAEMPELSE
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 230 774,40
Address
STRANDBOULEVARDEN 49
2100 Koebenhavn
Denmark

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Region
Danmark Hovedstaden Byen København
Activity type
Research Organisations
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