To investigate the role of Notch in specifying the dorsal midline structures, the floor plate (FP) and notochord (NC), Andrés Carrasco and colleagues blocked and activated Notch signalling in early frog embryos. Their findings, on p. 2225,show that when Notch signalling is activated, sonic hedgehog(shh) and pintallavis (plvs) expression is stimulated in the FP, whereas that of the NC markers chordin(chd) and brachyury (bra) is repressed. These expression changes are accompanied by FP expansion and a reduction in NC size. From these and other findings, the authors propose that Notch activation favours FP development at the expense of that of the NC in cells in the early organiser that have the potential to develop into either of these structures. This cell-fate switch probably occurs before mid gastrula and requires Presenilin.
The Company of Biologists Workshops
For the last 15 years, our publisher, The Company of Biologists, has provided an apt environment to inspire biology and support biologists through our Workshops series. Read about the evolution of the Workshop series and revisit JEB's experience with hosting the first Global South Workshop.
Call for papers – Lifelong Development: the Maintenance, Regeneration and Plasticity of Tissues
Development invites you to submit your latest research to our upcoming special issue – Lifelong Development: the Maintenance, Regeneration and Plasticity of Tissues. This issue will be coordinated by Guest Editors Meritxell Huch (Max Planck Institute of Molecular Cell Biology and Genetics, Germany) and Mansi Srivastava (Harvard University and Museum of Comparative Zoology, USA), working alongside our team of academic Editors. Submit your articles by 30 May 2025.
Meet our 2025 Pathway to Independence (PI) fellows
We are delighted to announce our third cohort of PI fellows - researchers whom we will be supporting as they transition from postdoc to Principal Investigator. Read about the eight talented fellows chosen, whom we're excited to be working with as they navigate the job market.
A case for broadening our view of mechanism in developmental biology
In this Perspective, B. Duygu Özpolat and colleagues survey researchers on their views on what it takes to infer mechanism in developmental biology. They examine what factors shape our idea of what we mean by ‘mechanism’ and suggest a path forward that embraces a broad outlook on the diversity of studies that advance knowledge in our field.
the Node: Have your say
Our community site, the Node, is conducting a user survey about the content and the design of the site. Help us shape the Node's future and thank you for being a part of the Node over the last 15 years.
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