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Method Article
This video demonstrates whole mount immunohistochemistry, a method by which the spatial and temporal expression pattern of an antigen can be visualized in young chick embryos. This method was originally introduced by Jane Dodd and Tom Jessell.
I. Schematic Overview:
This video demonstrates the different steps in whole mount immunohistochemistry in chick embryo. First, the embryo is fixed in PFA [IHC1]. Then, endogenous peroxidase activity is quenched [IHC2]. The embryo is then incubated in primary antibody [IHC3]. After several washes, the embryo is incubated in secondary antibody [IHC4]; Color reaction is revealed using DAB [IHC5] and antibody staining appears orange [IHC6].
Part 1: Fixing the embryos
Part 2: Preparing embryos for antibody step
Part 3: Antibody incubation
Part 3: Color reaction
Part 4: Embryo processing for photography and histology
Representative Results:
In the examples shown below, embryos are dissected at stages HH 10 (A), 12 (B) and 11 (C); Embryos show expression of PAX 7 in emerging neural crestas well as in somites and neural tube (A,B); In (C), notochord is labelled with 15.3B9 (Not-1) (Antibodies provided by Developmental Studies Hybridoma Bank).
This video demonstrates the different steps in performing whole-mount antibody staining in young chick embryos. This protocol is essentially used for the spatial and temporal characterization of novel antibodies in chick 2,3, as well as for the use of known antigenic markers to determine embryonic malformations following insult 4.
The monoclonal antibodies (15.3B9, PAX7) developed by ( J. Dodd, T.M Jessell and A. Kawakami) were obtained from the Developmental Studies Hybridoma Bank developed under the auspices of the NICHD and maintained by the University of Iowa, Department of Biological sciences, Iowa. D.P is recipient of Ruth Kirschstein Award 1F32 DA021977-01A1 from the National Institute on Drug Abuse. This work was supported by the Margaret M. Alkek Foundation to RHF.
Name | Company | Catalog Number | Comments | |
Eggs | Charles River Laboratories | Premium Fertile | Fertilized, HH4 (16 hr) | |
Stereomicroscope | Microscope | Leica Microsystems | MZ9.5 or similar | |
Marsh Automatic Incubator | Other | Lyon | RX | |
Curved Forceps (1) | Tool | Electron Microscopy Sciences | 72991-4C | |
Forceps (2) | Tool | Fine Science Tools | 11002-13 | |
Fine scissors | Tool | Fine Science Tools | 14161-10 | |
Plastic dishes | Tool | Falcon BD | 353001 | |
Rubber Bulb | Tool | Electron Microscopy Sciences | 70980 | |
Pasteur Capillary Pipette | Tool | Electron Microscopy Sciences | 70950-12 | round edge under flame |
Microdissecting knife | Tool | Fine Science Tools | 10056-12 | Use to cut embryo from surrounding membranes following fixation |
Sylgard 184 Silicon Elastomer Curing Agent and Base | Reagent | Dow Corning | 0001986475 | Mix 1 part Curing Agent, 9 parts Base; set O/N at 37C |
16% PFA | Reagent | Electron Microscopy Sciences | 15710 | |
30% H2O2 | Reagent | Sigma-Aldrich | H1009 | |
BSA | Reagent | Sigma-Aldrich | A3803 | |
NGS | Reagent | Jackson ImmunoResearch | 005-000-121 | |
Primary Antibodies | Reagent | Developmental Studies Hybridoma Bank | 4G11, 15.3B9, PAX7 | For these antibodies, investgators used mouse donnors |
Peroxidase conjugated-Goat Anti-Mouse IgG (H+L) | Reagent | Jackson ImmunoResearch | 115-035-003 | |
3,3’-diaminobenzidine tetrahydrochloride | Reagent | Pierce, Thermo Scientific | 34001 | Store at -20; Allow bottle to warm to RT before use. |
Cedar wood oil | Reagent | Sigma-Aldrich | W522503 | |
Fast green FCF | Reagent | Sigma-Aldrich | F7252 | |
Minuten pins 0.2mm diam | Fine Science Tools | 26002-20 |
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