UMR3348 – Stress génotoxique et cancer

Publications de l’unité

Année de publication : 2017

Laurence Vernis, Nadine El Banna, Dorothée Baïlle, Elie Hatem, Amélie Heneman, Meng-Er Huang (2018 Dec 28)

Fe-S Clusters Emerging as Targets of Therapeutic Drugs.

Oxidative medicine and cellular longevity : 3647657 : DOI : 10.1155/2017/3647657 En savoir plus
Résumé

Fe-S centers exhibit strong electronic plasticity, which is of importance for insuring fine redox tuning of protein biological properties. In accordance, Fe-S clusters are also highly sensitive to oxidation and can be very easily alteredby different drugs, either directly or indirectly due to catabolic by-products, such as nitric oxide species (NOS) or reactive oxygen species (ROS). In case of metal ions, Fe-S cluster alteration might be the result of metal liganding to the coordinating sulfur atoms, as suggested for copper. Several drugs presented through this review are either capable of direct interaction with Fe-S clusters or of secondary Fe-S clusters alteration following ROS or NOS production. Reactions leading to Fe-S cluster disruption are also reported. Due to the recent interest and progress in Fe-S biology, it is very likely that an increasing number of drugs already used in clinics will emerge as molecules interfering with Fe-S centers in the near future. Targeting Fe-S centers could also become a promising strategy for drug development.

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Année de publication : 2018

Anissia Ait Saada, Sarah A E Lambert, Antony M Carr (2018 Aug 25)

Preserving replication fork integrity and competence via the homologous recombination pathway.

DNA repair : DOI : S1568-7864(18)30182-4 En savoir plus
Résumé

Flaws in the DNA replication process have emerged as a leading driver of genome instability in human diseases. Alteration to replication fork progression is a defining feature of replication stress and the consequent failure to maintain fork integrity and complete genome duplication within a single round of S-phase compromises genetic integrity. This includes increased mutation rates, small and large scale genomic rearrangement and deleterious consequences for the subsequent mitosis that result in the transmission of additional DNA damage to the daughter cells. Therefore, preserving fork integrity and replication competence is an important aspect of how cells respond to replication stress and avoid genetic change. Homologous recombination is a pivotal pathway in the maintenance of genome integrity in the face of replication stress. Here we review our recent understanding of the mechanisms by which homologous recombination acts to protect, restart and repair replication forks. We discuss the dynamics of these genetically distinct functions and their contribution to faithful mitoticsegregation.

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Wang X, Allen WE, Wright MA, Sylwestrak EL, Samusik N, Vesuna S, Evans K, Liu C, Ramakrishnan C, Liu J, Nolan GP*, Bava FA*, Deisseroth K*. *co-last, co-corresponding author (2018 Jul 27)

Three-dimensional intact-tissue sequencing of single-cell transcriptional states.

Science (New York, N.Y.) : DOI : eaat5691 En savoir plus
Résumé

Retrieving high-content gene-expression information while retaining 3D positional anatomy at cellular resolution has been difficult, limiting integrative understanding of structure and function in complex biological tissues. Here we develop and apply a technology for 3D intact-tissue RNA sequencing, termed STARmap (Spatially-resolved Transcript Amplicon Readout Mapping), which integrates hydrogel-tissue chemistry, targeted signal amplification, and in situ sequencing. The capabilities of STARmap were tested by mapping 160 to 1,020 genes simultaneously in sections of mouse brain at single-cell resolution with high efficiency, accuracy and reproducibility. Moving to thick tissue blocks, we observed a molecularly-defined gradient distribution of excitatory-neuron subtypes across cubic millimeter-scale volumes (>30,000 cells), and discovered a short-range 3D self-clustering in many inhibitory-neuron subtypes that could be identified and described with 3D STARmap.

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Maria M Magiera, Puja Singh, Carsten Janke (2018 May 31)

SnapShot: Functions of Tubulin Posttranslational Modifications.

Cell : 1552-1552.e1 : DOI : 10.1016/j.cell.2018.05.032 En savoir plus
Résumé

Post-translational modification of tubulin offers a mechanism for functional diversification of microtubules and regulation in a variety of physiological contexts. This SnapShot recaps the current state of understanding of tubulin posttranslational modifications and their functions in the regulation of biological processes. To view this SnapShot, open or download the PDF.

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