Related Experiment Video
Updated: Aug 7, 2026
09:58
An Optimized Protocol for Electrophoretic Mobility Shift Assay Using Infrared Fluorescent Dye-labeled Oligonucleotides
Published on: November 29, 2016
Regulation of ectodermal and excretory function by the C. elegans POU homeobox gene ceh-6
1Department of Molecular Biology, Massachusetts General Hospital, Fruit Street, Boston, MA 02114, USA. Thomas.Burglin@biosci.ki.se
Development (Cambridge, England)
|February 15, 2001
Summary
The POU homeobox gene CEH-6 in C. elegans is crucial for embryonic development and osmoregulation. Its absence leads to severe defects in rectal epithelial and excretory cells, causing embryonic lethality.
Area of Science:
- Developmental Biology
- Genetics
- Molecular Biology
Background:
- Caenorhabditis elegans possesses three POU homeobox genes: unc-86, ceh-6, and ceh-18.
- CEH-6 is the ortholog of vertebrate Brn1, Brn2, SCIP/Oct6, Brn4, and fly Cf1a/drifter/ventral veinless.
- CEH-6 is highly conserved between C. elegans and C. briggsae.
Purpose of the Study:
- To investigate the function and expression patterns of the POU homeobox gene CEH-6 in C. elegans.
- To determine the role of CEH-6 in embryonic development, morphogenesis, and osmoregulation.
- To explore the evolutionary conserved function of POU-III transcription factors.
Main Methods:
- Immunofluorescent detection of CEH-6 protein expression.
- Analysis of a ceh-6 null mutant generated by locus deletion.
- Utilizing a GFP reporter construct to visualize excretory cell structures.
Main Results:
- CEH-6 is expressed in specific head and ventral cord neurons, rectal epithelial cells, and the osmoregulatory excretory cell.
- A ceh-6 deletion results in 80% embryonic lethality, with defects in rectal epithelial cell morphogenesis (extrusion or rupture).
- ceh-6 null mutants exhibit post-hatching sickness, vacuole formation, and abnormal excretory canal structures.
Conclusions:
- CEH-6 plays a critical role in rectal epithelial cell development and osmoregulation via the excretory cell in C. elegans.
- POU-III family members may have an evolutionarily conserved function in regulating genes involved in secretion and osmoregulation across species.
- The study highlights the importance of CEH-6 in ensuring proper embryonic development and physiological homeostasis.
More Related Videos
10:30The C. elegans Excretory Canal as a Model for Intracellular Lumen Morphogenesis and In Vivo Polarized Membrane Biogenesis in a Single Cell: labeling by GFP-fusions, RNAi Interaction Screen and Imaging
Published on: October 3, 2017
09:36Detecting Protein Subcellular Localization by Green Fluorescence Protein Tagging and 4',6-Diamidino-2-phenylindole Staining in Caenorhabditis elegans
Published on: July 30, 2018
Related Concept Videos
01:33Pleiotropy
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
02:02Cis-regulatory Sequences
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
02:23Master Transcription Regulators
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
02:54Canonical Wnt Signaling Pathway
The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which results in tumor...
02:33Hedgehog Signaling Pathway
The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...
01:22Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal
Erythropoietin-producing hepatocellular carcinoma receptor (Eph) and its ligand, Eph receptor-interacting protein (Ephrin) were first discovered in the human carcinoma cell line, hence the name. Ephrin-Eph interaction guides cells to reach their appropriate location in adult tissues. They also play an essential role in the immune system by helping in immune cell migration, adhesion, and activation. Based on their structure and function, Eph is divided into two classes — EphA and EphB.