Related Experiment Video
Updated: Jul 7, 2026
09:56
Mapping the Emergent Spatial Organization of Mammalian Cells using Micropatterns and Quantitative Imaging
Published on: April 30, 2019
Border formation in a Bmp gradient reduced to single dissociated cells.
Jia Sheng Hu1, Linda T Doan, D Spencer Currle
1Department of Pathology and Laboratory Medicine, School of Medicine, University of California, D440 Medical Sciences I, Irvine, CA 92697-4800, USA.
Summary
Dissociated neural precursor cells (NPCs) exhibit ultrasensitivity to bone morphogenetic protein 4 (Bmp4), mimicking developmental "all-or-none" border formation. This cell-intrinsic property is robust and reducible, offering insights into developmental biology.
Area of Science:
- Developmental Biology
- Cellular Biology
- Molecular Biology
Background:
- Sharp developmental borders arise from signaling gradients, but their reduction to cell culture has been unclear.
- Understanding how individual cells respond to morphogen gradients is crucial for developmental processes.
Purpose of the Study:
- To investigate ultrasensitivity, an all-or-none response, in dissociated neural precursor cells (NPCs) exposed to bone morphogenetic protein 4 (Bmp4).
- To determine if this ultrasensitivity contributes to developmental border formation.
Main Methods:
- Utilized dissociated neural precursor cells (NPCs) and bone morphogenetic protein 4 (Bmp4) signaling.
- Measured Msx1 induction as a Bmp target response at population and single-cell levels.
- Performed Bmp4 gain-of-function studies in explants and analyzed Bmp gradient contexts in vivo.
Main Results:
- Demonstrated ultrasensitivity in dissociated NPCs to Bmp4, evidenced by Msx1 induction.
- Observed immediate early kinetics and irreversibility of Msx1 induction after brief Bmp4 exposure.
- Confirmed single-cell ultrasensitivity in developing forebrain contexts, including normal and mutant Bmp gradients.
Conclusions:
- Dissociated NPCs exhibit robust, reducible, cell-intrinsic ultrasensitivity to Bmp4.
- This ultrasensitivity contributes to developmental border formation within signaling gradients.
- The findings provide a simplified model for studying border formation mechanisms.
