Cover: The virtual surface of a mouse retina fluorescently labelled with GSL I-B4 isolectin (green) to show the retinal vasculature and with antibodies against Brn3 (red) and GFAP (white) to show ganglion cells and astrocytes, respectively. Correct retinal development requires that Müller glia receive a transient BMP signal at the end of neurogenesis. See Research article by Ueki et al. on p. 533.
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IN THIS ISSUE
Reaching out – the many faces of science outreach
Summary: This Spotlight discusses diverse ways in which scientists can engage with the wider community to further the public understanding of science, and encourage individuals to get involved.
Mathematically guided approaches to distinguish models of periodic patterning
Summary: This Hypothesis presents a mathematical approach to understanding periodic patterning during development, and suggests ways in which molecular, cellular or mechanical models can be tested.
Building a plant: cell fate specification in the early Arabidopsis embryo
Summary: This Review summarises our current understanding of the early stages of plant embryogenesis, with a focus on how the major lineages are specified.
STEM CELLS AND REGENERATION
The differential activation of intracellular signaling pathways confers the permissiveness of embryonic stem cell derivation from different mouse strains
Highlighted article: Different mouse strains show distinct JAK-Stat and MAPK activity responses to LIF treatment, accounting for the varying ease of generating stem cells from these lines.
Tetraspanin CD9 and ectonucleotidase CD73 identify an osteochondroprogenitor population with elevated osteogenic properties
Summary: High-throughput screening identifies a subpopulation of mouse mesenchymal progenitors with enhanced osteogenic capacity in both in vivo and in vitro assays.
A plant U-box protein, PUB4, regulates asymmetric cell division and cell proliferation in the root meristem
Highlighted article: The Arabidopsis E3 ubiquitin ligase PUB4 acts downstream of the CLV3/CLE peptides to regulate stem cell division and patterning in the growing root.
AIL and HDG proteins act antagonistically to control cell proliferation
Summary: The Arabidopsis AIL and HDG transcription factors exert opposing roles in meristems, acting via physical interactions and shared downstream targets to control proliferation vs. differentiation.
Mediator Med23 deficiency enhances neural differentiation of murine embryonic stem cells through modulating BMP signaling
Summary: A component of the Mediator complex, which regulates RNA pol II activity, modulates BMP signalling to render stem cells less prone to differentiation down the neuronal lineage.
A computational model for the coordination of neural progenitor self-renewal and differentiation through Hes1 dynamics
Summary: Computational modelling deciphers the connections between the cell-cycle machinery and Notch signalling which govern whether neural stem cells proliferate, differentiate or enter quiescence.
Regulation of ECM degradation and axon guidance by growth cone invadosomes
Highlighted article: Growth cones from multiple neuronal types form F-actin-rich protrusions called invadosomes, which are necessary for axonal growth as motor neurons exit the spinal cord.
β-catenin-dependent transcription is central to Bmp-mediated formation of venous vessels
Highlighted article: In the developing fish caudal vein, β-catenin is activated by BMP in a Wnt-independent manner and cooperates with Aggf1 to control venous endothelial cell differentiation.
DNA hypomethylation induces a DNA replication-associated cell cycle arrest to block hepatic outgrowth in uhrf1 mutant zebrafish embryos
Summary: Uhrf1 recruits DNA methyltransferase 1; upon its mutation, cells show enhanced DNA replication but fail to proliferate and ultimately die - leading to reduced organ size.
ERBB3-mediated regulation of Bergmann glia proliferation in cerebellar lamination
Summary: Erbb3 knockout mice show cerebellar lamination and subsequent behavioural defects due to impaired proliferation of Bergmann glia - the scaffolds for granule neuron migration.
A transient wave of BMP signaling in the retina is necessary for Müller glial differentiation
Summary: BMP signalling is transiently activated in the postnatal mouse retina to terminate the neurogenic program and promote the expression of glial-specific genes.
Surrounding tissues canalize motile cardiopharyngeal progenitors towards collective polarity and directed migration
Summary: Disrupting communication between migrating Ciona cardiac progenitors and their surrounding tissues reveals diverse mechanisms by which neighbouring cells influence directed migration in vivo.
Ciliary proteins Bbs8 and Ift20 promote planar cell polarity in the cochlea
Summary: A subset of cilia proteins are involved in intracellular trafficking of membrane-bound proteins, including planar cell polarity regulators, to non-ciliary locations.
A dynamic Shh expression pattern, regulated by SHH and BMP signaling, coordinates fusion of primordia in the amniote face
Summary: Iterative Shh and BMP signalling mechanisms induce a dynamic pattern of Shh expression in the mouse facial ectoderm that governs morphogenesis of the underlying mesenchyme.
SMAD2 and p38 signaling pathways act in concert to determine XY primordial germ cell fate in mice
Summary: In male primodial germ cells, depletion of Smad2 leads to loss of male-specific gene expression, while p38 is required for suppression of retinoic acid signalling and meiosis.
TECHNIQUES AND RESOURCES
A gene expression atlas of a bicoid-depleted Drosophila embryo reveals early canalization of cell fate
Summary: Drosophila bicoid mutant embryos show severe patterning phenotypes, but individual cells retain wild-type fates - as judged by expression of key patterning genes at single-cell resolution.
CoinFLP: a system for efficient mosaic screening and for visualizing clonal boundaries in Drosophila
Summary: A new Drosophila tool combines clonal analysis with Gal4/UAS-regulated transcription to enable high-throughput screening of gene knockdown or overexpression in mosaic tissues.
ARTICLES OF INTEREST IN OTHER COB JOURNALS
From Journal of Cell Science
Selective synaptic targeting of the excitatory and inhibitory presynaptic organizers FGF22 and FGF7
The Forest of Biologists
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Propose a new Workshop for 2025
Do you have an idea for a Workshop? We are now accepting proposals for our 2025 Biologists Workshops programme. As the scientific organiser, your involvement will be focused on the science. We'll take care of all the logistics. In 2025 we'll continue our efforts to diversify our Workshop programme and will be reserving one of our Workshops for an application from a Global South (GS) country to host an event overseas.
Development presents… Outstanding Paper Prize Finalists
On Wednesday 19 April, Development hosted a webinar celebrating the finalists for Development’s Inaugural Outstanding Paper Prize. The talks and Q&As were hosted by our Deputy Editor, Steve Wilson (UCL).
Development Journal Meeting 2023
The Abstract deadline for our 2023 Journal Meeting ‘Unconventional and Emerging Experimental Organisms in Cell and Developmental Biology’ is 23 June 2023. Find out more and apply here
Keeping up with the Node
Thirteen years on from its launch, the Node continues to be a place to share research stories, opinions, job adverts and event listings. Development have published a recent Editorial reviewing some of our most popular features, as well as introducing some new initiatives.