Related Experiment Video
Updated: Jul 28, 2026
Time-lapse Microscopy of Early Embryogenesis in Caenorhabditis elegans
Published on: August 25, 2011
A novel small molecule that disrupts a key event during the oocyte-to-embryo transition in C. elegans
Steven E Weicksel1, Assaf Mahadav2, Mark Moyle3
1Dept. of Genetics, Yale University School of Medicine, New Haven, CT 06520, USA.
Abstract:
The complex cellular events that occur in response to fertilization are essential for mediating the oocyte-to-embryo transition. Here, we describe a comprehensive small-molecule screen focused on identifying compounds that affect early embryonic events in Caenorhabditis elegans We identify a single novel compound that disrupts early embryogenesis with remarkable stage and species specificity. The compound, named C22, primarily impairs eggshell integrity, leading to osmotic sensitivity and embryonic lethality. The C22-induced phenotype is dependent upon the upregulation of the LET-607/CREBH transcription factor and its candidate target genes, which primarily encode factors involved in diverse aspects of protein trafficking. Together, our data suggest that in the presence of C22, one or more key components of the eggshell are inappropriately processed, leading to permeable, inviable embryos. The remarkable specificity and reversibility of this compound will facilitate further investigation into the role and regulation of protein trafficking in the early embryo, as well as serve as a tool for manipulating the life cycle for other studies such as those involving aging.
Insights
Scientists discovered a novel compound, C22, that disrupts early embryogenesis in Caenorhabditis elegans by impairing eggshell integrity. This compound offers a specific tool for studying protein trafficking and embryonic development.
Area of Science:
- Developmental Biology
- Molecular Biology
- Genetics
Background:
- Fertilization triggers complex cellular events crucial for the oocyte-to-embryo transition.
- Understanding early embryonic development is key to reproductive biology and developmental disorders.
Purpose of the Study:
- To identify novel small molecules that modulate early embryonic development.
- To investigate the molecular mechanisms underlying compound-induced embryonic defects.
- To explore potential applications of identified compounds in biological research.
Main Methods:
- Conducted a comprehensive small-molecule screen in Caenorhabditis elegans.
- Utilized phenotypic analysis to assess compound effects on embryogenesis.
- Investigated gene expression changes and protein trafficking pathways affected by the compound.
Main Results:
- Identified a novel compound, C22, with stage and species-specific effects on early embryogenesis.
- C22 impairs eggshell integrity, causing osmotic sensitivity and embryonic lethality.
- The C22 phenotype is linked to the LET-607/CREBH transcription factor and its target genes involved in protein trafficking.
Conclusions:
- C22 disrupts proper eggshell component processing, leading to permeable and inviable embryos.
- The compound's specificity and reversibility make it a valuable tool for studying protein trafficking in early embryos.
- C22 can be used to manipulate life cycles for research, including aging studies.
