Germline Extrusion
Germline Extrusion - Related Videos
10:22
Demonstration of the Power Law Model Through Extrusion
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2023
Source: Kerry M. Dooley and Michael G. Benton, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA Polymer melts are often formed into simple shapes or "extrudates", such as cylindrical pellets, flat sheets, or pipe, using an extruder.1 Polyolefins are among the most common extrudable polymers. Extrusion involves transporting and melting solid feed, which is sometimes mixed with non-polymeric materials, and the pressure build-up and transport of the melt or mixture.
09:39
Live Imaging of Cell Extrusion from the Epidermis of Developing Zebrafish
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Cited by 20 •
2011
Dying cells are extruded from epithelial tissues by concerted contraction of neighboring cells without disrupting barrier function. The optical clarity of developing zebrafish provides an excellent system to visualize extrusion in living epithelia. Here we describe methods to induce and image extrusion in the larval zebrafish epidermis at cellular resolution.
10:55
Comprehensive Assessment of Germline Chemical Toxicity Using the Nematode Caenorhabditis elegans
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Cited by 11 •
2015
We describe the detailed steps of a high-throughput chemical assay in the nematode Caenorhabditis elegans used to assess germline toxicity. In this assay, disruption of germline function following chemical exposure is monitored using a fluorescent reporter specific to aneuploid embryos.
08:10
Hydraulic Extrusion of the Spinal Cord and Isolation of Dorsal Root Ganglia in Rodents
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Cited by 110 •
2017
Here, we present a protocol for hydraulic extrusion of the spinal cord as well as identification and isolation of specific dorsal root ganglia (DRGs) in the same rodent. Compared to standard spinal cord isolation methods, this method is significantly faster and reduces the risk of tissue damage.
10:37
CRISPR/Cas9-mediated Endogenous Fluorescent Tagging of Germline-specific Genes in Caenorhabditis elegans
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2026
A CRISPR/Cas9 microinjection workflow for endogenous fluorescent tagging in the Caenorhabditis elegans germline to obtain homozygous knock-in lines for in vivo protein localization analysis.
FAQs
Changes in cell adhesion alter how selected germ cells remain attached to neighboring tissue. As these attachments are remodeled, the cells can be displaced relative to surrounding cells and directed toward an epithelial or tissue boundary. This coordination prevents extrusion from occurring as an isolated movement and links cell positioning to preservation of tissue organization.
Actin–myosin contractility supplies a mechanical component to the process by remodeling the cytoskeleton and generating forces within or around selected germ cells. These forces help drive cellular movement away from neighboring tissue. Examining contractility therefore helps explain how molecular changes are converted into the physical displacement required for controlled germline removal.
Movement toward an epithelial or tissue boundary provides an organized route for removing selected cells rather than disrupting the interior of the gonad or developing tissue. Boundary-directed movement connects cytoskeletal remodeling and adhesion changes with tissue-level architecture. This spatial control helps maintain organization while allowing germline cell number to be regulated.
Analysis should focus on changes in cell adhesion, cytoskeletal remodeling, and actin–myosin contractility, together with the position of selected cells relative to neighboring tissue and a tissue boundary. Considering these features together can distinguish coordinated extrusion from nonspecific cell loss and reveal how cellular behavior contributes to tissue organization.
The process is particularly relevant when researchers investigate how organisms eliminate damaged, surplus, or developmentally inappropriate germ cells. These situations connect cell removal with germline cell-number control and reproductive function. Studying them can clarify how tissues balance the removal of unsuitable cells with preservation of the germline needed for reproduction.
Research on germline extrusion can inform studies of tissue homeostasis, fertility, and cell competition, while also addressing how organisms protect the transmission of genetic information. Because the process links cell behavior with germline quality and number, it provides a genetics context for understanding how tissue-level regulation may influence reproductive outcomes.