Hypochlorite Dechorionation
Hypochlorite Dechorionation - Related Videos
03:26
Drosophila Egg Collection and Dechorionation: A Method to Remove the Outermost Egg Layer
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2023
The Drosophila embryo is surrounded by protective outer membranes. To gain access to the embryo, the chorion–the outermost of the membranes–is often removed. This video describes a commonly used method of dechorionation using sodium hypochlorite. The example protocol demonstrates the procedure while employing sterile techniques necessary for axenic or gnotobiotic animal rearing.
09:03
Dechorionation of Medaka Embryos and Cell Transplantation for the Generation of Chimeras
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Cited by 20 •
2010
Due to the hard chorion and soft embryos, manipulation of medaka embryos is more involved than in zebrafish. This video shows step-by-step procedures for how to manipulate medaka embryos, including dechorionation, mounting in agarose for imaging and cell transplantation for the production of chimeras. These procedures are essential to use medaka and zebrafish in a laboratory to take full advantage of their complementary features for the genetic dissection of vertebrate genome functions.
09:38
Embryo Microinjection and Electroporation in the Chordate Ciona intestinalis
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Cited by 17 •
2016
We present transient transgenesis and gene knockdown in Ciona intestinalis, a chordate sister group to vertebrates, using microinjection and electroporation techniques. Such methods facilitate functional genomics in this simple invertebrate that features rudimentary characteristics of vertebrates, including notochord and head sensory epithelia, and many orthologs of human disease associated genes.
05:42
Using a Sandwich ELISA to Determine the Immunogenic Glycoprotein Content in a Vaccine
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2025
This video showcases an indirect enzyme-linked immunosorbent assay or ELISA sandwich immunocapture assay designed to assess immunogenic glycoprotein levels in vaccines. The assay plate, containing glycoprotein-specific antibodies, is incubated with serially diluted vaccine samples, including reference and test vaccines, followed by immunoassay to quantify glycoprotein content in the test vaccine.
09:34
Rearing the Fruit Fly Drosophila melanogaster Under Axenic and Gnotobiotic Conditions
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Cited by 128 •
2016
A method for rearing Drosophila melanogaster under axenic and gnotobiotic conditions is presented. Fly embryos are dechorionated in sodium hypochlorite, transferred aseptically to sterile diet, and reared in closed containers. Inoculating diet and embryos with bacteria leads to gnotobiotic associations, and bacterial presence is confirmed by plating whole-body Drosophila homogenates.
FAQs
Dilute hypochlorite chemically degrades the chorion surrounding the embryo. As this protective layer is removed, the embryo becomes more accessible for observation and experimental manipulation. The treatment must remain controlled because the same chemical exposure that affects the chorion can also reduce embryo viability if conditions are too strong or prolonged.
Both solution strength and exposure duration influence the balance between effective chorion removal and embryo preservation. Insufficient treatment may leave the chorion incompletely removed, whereas excessive chemical exposure can compromise viability. Researchers therefore need consistent conditions when preparing embryos for imaging, microinjection, or developmental experiments.
Rinsing removes residual hypochlorite and stops further chemical exposure after the chorion has been degraded. This step helps protect the embryo from continued contact with the solution, reducing avoidable effects on viability. Inconsistent rinsing can make embryo condition less uniform and may weaken the reliability of subsequent developmental observations or treatments.
The procedure consists of exposing embryos to a dilute hypochlorite solution for a carefully controlled period, then rinsing them thoroughly to terminate exposure. Researchers should handle the embryos carefully throughout the sequence and maintain consistent solution strength and timing. These controls support reproducible chorion removal while limiting damage to the developing embryo.
Dechorionated zebrafish embryos provide clearer access for observing morphology and developmental events because the surrounding chorion no longer obstructs direct examination to the same extent. This can support more consistent assessment of embryogenesis, including studies that compare developmental effects across experimental conditions. The benefit depends on preserving embryo viability during treatment.
Researchers can apply dechorionation when they need direct access to zebrafish embryos for microinjection or experimental treatments, or when they require clearer visualization of development. The approach is relevant to investigations of embryogenesis, environmental effects, and developmental mechanisms. Its usefulness comes from improving access and observation without overlooking the need for careful chemical control.