Publications de Leonardo Beccari

Sequential in cis mutagenesis in vivo reveals various functions for CTCF sites at the mouse HoxD cluster

Denis Duboule, Leonardo Beccari, Lucille Delisle, Jozsef Zakany

In this study, Amandio et al. sought to understand the functions of the highly conserved CTCF sites distributed over the Hox gene clusters. The authors produced an allelic series of cumulative in cis mutations in these sites, up to the abrogation of CTCF b ...

COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT2021

Chromatin topology and the timing of enhancer function at the HoxD locus

Denis Duboule, Leonardo Beccari, Lucille Delisle, Edgardo Rodriguez Carballo

The HoxD gene cluster is critical for proper limb formation in tetrapods. In the emerging limb buds, different subgroups of Hoxd genes respond first to a proximal regulatory signal, then to a distal signal that organizes digits. These two regulations are e ...

National Academy of Sciences2020

Multi-axial self-organization properties of mouse embryonic stem cells into gastruloids

Matthias Lütolf, Denis Duboule, Leonardo Beccari, Mehmet Ugur Girgin, Anne-Catherine Cossy, Alfonso Martinez Arias

The emergence of multiple axes is an essential element in the establishment of the mammalian body plan. This process takes place shortly after implantation of the embryo within the uterus and relies on the activity of gene regulatory networks that coordina ...

NATURE PUBLISHING GROUP2018

Similarities and differences in the regulation of HoxD genes during chick and mouse limb development

Denis Duboule, Guillaume Andrey, Leonardo Beccari, Nayuta Yakushiji, Christopher Chase Bolt, Lucille Delisle

In all tetrapods examined thus far, the development and patterning of limbs require the activation of gene members of the HoxD cluster. In mammals, they are regulated by a complex bimodal process that controls first the proximal patterning and then the dis ...

PUBLIC LIBRARY SCIENCE2018

Large scale genomic reorganization of topological domains at the HoxD locus

Denis Duboule, Daniël Noordermeer, Marion Leleu, Pierre Raymond Fabre, Leonardo Beccari, Benjamin Howard Mormann, Lucille Delisle

BACKGROUND: The transcriptional activation of HoxD genes during mammalian limb development involves dynamic interactions with two topologically associating domains (TADs) flanking the HoxD cluster. In particular, the activation of the most posterior HoxD g ...

2017

The HoxD cluster is a dynamic and resilient TAD boundary controlling the segregation of antagonistic regulatory landscapes

Denis Duboule, Pierre Raymond Fabre, Leonardo Beccari, Lucille Delisle, Edgardo Rodriguez Carballo

The mammalian HoxD cluster lies between two topologically associating domains (TADs) matching distinct enhancer-rich regulatory landscapes. During limb development, the telomeric TAD controls the early transcription of Hoxd genes in forearm cells, whereas ...

2017

Control of Hoxd gene transcription in the mammary bud by hijacking a preexisting regulatory landscape

Denis Duboule, Virginie Marcet, Guillaume Andrey, Leonardo Beccari, Anamaria Necsulea, Edgardo Rodriguez Carballo, Jozsef Zakany

Vertebrate Hox genes encode transcription factors operating during the development of multiple organs and structures. However, the evolutionary mechanism underlying this remarkable pleiotropy remains to be fully understood. Here, we show that Hoxd8 and Hox ...

National Academy of Sciences2016

A role for HOX13 proteins in the regulatory switch between TADs at the HoxD locus

Denis Duboule, Nicolas Lonfat, Leonardo Beccari, Anamaria Necsulea, Nayuta Yakushiji, Edgardo Rodriguez Carballo

During vertebrate limb development, Hoxd genes are regulated following a bimodal strategy involving two topologically associating domains (TADs) located on either side of the gene cluster. These regulatory landscapes alternatively control different subsets ...

Cold Spring Harbor Laboratory2016