Understanding the Mechanobiology of Early Mammalian Development through Bioengineered Models

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Unequal cleavage of the C. elegans zygote ensures robust embryogenesis

Radek Jankele

Asymmetric cell divisions play key roles in generating cellular diversity during embryogenesis, and in tissue homeostasis during postembryonic life. Particular asymmetric cell divisions producing differentially sized daughter cells were described in many s ...

EPFL2020

Fractal Analysis And Related Forms Of Complexity Of Embryo Development. Is There A New Tool For Human Embryo Selection?

Maria-Alexandra Paun

A total number of 1092 embryos, originated from 168 couples that underwent IVF cycles, were analyzed in this study. The embryos were cultivated in a continuous culture and monitored using the time lapse system EmbryoScope. The microscopic images of the fer ...

UNIV POLITEHNICA BUCHAREST, SCI BULL2019

Automated Platform for Long-Term Culture and High-Content Phenotyping of Single C. elegans Worms

Johan Auwerx, Martinus Gijs, Matteo Cornaglia, Laurent Mouchiroud, Rongrong Xiang, Elena Katsyuba, Hüseyin Baris Atakan

The nematode Caenorhabditis elegans is a suitable model organism in drug screening. Traditionally worms are grown on agar plates, posing many challenges for long-term culture and phenotyping of animals under identical conditions. Microfluidics allows for ' ...

Nature Research2019

8-Channel Single Embryo Pipette For Accurate C-Elegans Bioassays

Martinus Gijs, Thomas Lehnert, Li Dong, Jingwei Zhang

The nematode Caenorhabditis elegans (C. elegans) is a powerful model organism for addressing fundamental biological questions related to human disease and aging. Accurate control of the number of worms is a primary step for quantitative biological or bioch ...

IEEE2018

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

Denis Duboule, Matthias Lütolf, 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

DUX-family transcription factors regulate zygotic genome activation in placental mammals

Didier Trono, Andrea Coluccio, Evaristo Jose Planet Letschert, Julien Léonard Duc, Alberto De Iaco, Sonia Verp

In animal embryos, transcription is mostly silent for several cell divisions, until the release of the first major wave of embryonic transcripts through so-called zygotic genome activation (ZGA). Maternally provided ZGA-triggering factors have been identif ...

2017

Segmentation of Developing Human Embryo in Time-lapse Microscopy

Mathieu Salzmann

Being able to efficiently segment a developing embryo from background clutter constitutes an important step in automated monitoring of human embryonic cells. State-of-the-art automatic segmentation methods remain ill-suited to handle the complex behavior a ...

IEEE2016

Molecular Criteria for Defining the Naive Human Pluripotent State

Didier Trono, Evaristo Jose Planet Letschert, Julien Paul André Pontis, Julien Léonard Duc, Alexandra Iouranova, Marc Samuel Friedli, Michaël Imbeault, Haoyi Wang

Recent studies have aimed to convert cultured human pluripotent cells to a naive state, but it remains unclear to what extent the resulting cells recapitulate in vivo naive pluripotency. Here we propose a set of molecular criteria for evaluating the naive ...

Cell Press2016

Versatile size-dependent sorting of C-elegans nematodes and embryos using a tunable microfluidic filter structure

Martinus Gijs, Thomas Lehnert, Matteo Cornaglia, Li Dong

The roundworm Caenorhabditis elegans (C. elegans) is a powerful model organism for addressing fundamental biological questions related to human disease and aging. Its life cycle consists of an embryo stage, four larval stages that can be clearly distinguis ...

Royal Soc Chemistry2016

Epiblast-specific loss of HCF-1 leads to failure in anterior-posterior axis specification

Daniel Constam, Winship Herr, Sylvain Frédéric Bessonnard

Mammalian Host-Cell Factor 1 (HCF-1), a transcriptional co-regulator, plays important roles during the cell-division cycle in cell culture, embryogenesis as well as adult tissue. In mice, HCF-1 is encoded by the X-chromosome-linked Hcfc1 gene. Induced Hcfc ...

Academic Press Inc Elsevier Science2016

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