Protocols

Online Xenopus Resources

• Cold Spring Harbor Protocols - Xenopus [1], 130+ articles - subscription required, select articles listed:
  • Housing and Feeding of Xenopus laevis - Sive et al. [2]
  • Inducing Ovulation in Xenopus laevis - Sive et al. [3]
  • Xenopus laevis In Vitro Fertilization and Natural Mating Methods - Sive et al. [4]
  • Egg Collection and In Vitro Fertilization of the Western Clawed Frog Xenopus tropicalis - Showell & Conlon [5]
  • Isolation of Xenopus Oocytes - Sive et al. [6]
  • Isolating Xenopus laevis Testes - Sive et al. [7]
  • Dejellying Xenopus laevis Embryos - Sive et al. [8]
  • Removing the Vitelline Membrane from Xenopus laevis Embryos - Sive et al. [9]
  • Microinjection of Xenopus Embryos - Sive et al. [10]
  • Defolliculation of Xenopus Oocytes - Sive et al. [11]
  • Microinjection of Xenopus Oocytes - Sive et al. [12]
  • Animal Cap Isolation from Xenopus laevis - Sive et al. [13]
  • Xenopus laevis Keller Explants - Sive et al. [14]
  • Microinjection of RNA and Preparation of Secreted Proteins from Xenopus Oocytes - Sive et al. [15]
  • Calibration of the Injection Volume for Microinjection of Xenopus Oocytes and Embryos - Sive et al. [16]
  • Isolation of DNA from Red Blood Cells in Xenopus - Sive et al. [17]
  • Investigating Morphogenesis in Xenopus Embryos: Imaging Strategies, Processing, and Analysis - Kim & Davidson [18]
  • Low-Magnification Live Imaging of Xenopus Embryos for Cell and Developmental Biology - Wallingford [19]
  • High-Magnification In Vivo Imaging of Xenopus Embryos for Cell and Developmental Biology - Keiserman et al. [20]
  • Preparation of Fixed Xenopus Embryos for Confocal Imaging - Wallingford [21]
  • Whole-Mount Fluorescence Immunocytochemistry on Xenopus Embryos - Lee et al. [22]
  • Generation of Transgenic Xenopus laevis - Kroll & Amaya - [23] [24] [25]
  • In Vivo Time-Lapse Imaging of Neuronal Development in Xenopus - Ruthazer et al. [26]
  • Photoconversion for Tracking the Dynamics of Cell Movement in Xenopus laevis Embryos - Chernet et al. [27]
  • Single-Cell Electroporation in Xenopus - Liu & Haas [28]
  • Imaging Axon Pathfinding in Xenopus In Vivo - Leung & Holt [29]
  • A Versatile Protocol for mRNA Electroporation of Xenopus laevis Embryos - Chernet & Levin [30]

• The Journal of Visualized Experiments (JOVE) - Xenopus embryo [31] - excellent video demonstrations
  • Obtaining Eggs from Xenopus laevis Females - Cross & Powers [32]
  • Microinjection of Xenopus Laevis Oocytes - Cohen et al. - [33]
  • Fertilization of Xenopus oocytes, Host Transfer Method - Schneider et al. [34]
  • Tissue Determination Using Animal Cap Transplant (ACT) Assay in X. laevis - Viczian & Zuber [35]
  • Blastomere Explants to Test for Cell Fate Commitment - Grant et al. [36]
  • Transgenic Xenopus laevis by Restriction Enzyme Mediated Integration and Nuclear Transplantation - Amaya & Kroll [37]
  • Organizer and Animal Pole Explants from X. laevis Embryos and Cell Adhesion Assay - Ogata & Cho [38]
  • Plastic Embedding and Sectioning of X. laevis Embryos - Ogata1 et al. [39]
  • Visualizing RNA Localization in Xenopus Oocytes - Gagnon & Mowry [40]
  • Neural Explant Cultures from Xenopus laevis - Lowery et al. [41]
  • Translocation of Fluorescent Proteins in Xenopus Ectoderm in Response to Wnt Signaling - Itoh & Sokol [42]
  • Dissection, Culture, and Analysis of X. laevis Embryonic Retinal Tissue - McDonough et al. [43]
  • X. tropicalis Egg Extracts to Identify Microtubule-associated RNAs - Sharp & Blower [44]
  • Electroporation of Craniofacial Mesenchyme - Tabler & Liu [45]
  • Electrophysiological Recording from Xenopus Nerve-muscle Co-cultures - Yazejian et al. [46]
  • Single Cell Electroporation in vivo within the Intact Developing Brain - Hewapathirane & Haas - [47]
  • Live-cell Imaging and Quantitative Analysis of Embryonic Epithelial Cells - Joshi & Davidson [48]
  • Preparation and Fractionation of Xenopus laevis Egg Extracts - Cross & Powers [49]
  • In Vitro Nuclear Assembly Using Fractionated Xenopus Egg Extracts - Cross & Powers [50]
  • Study of the DNA Damage Checkpoint using Xenopus Egg Extracts - Willis et al. [51]
  • Two Types of Assays for Detecting Frog Sperm Chemoattraction - Burnett et al. [52]
  • Comparative in vivo Study of gp96 Adjuvanticity in X. laevis - Nedelkovska et al. [53]
  • Patch Clamp and Perfusion Techniques - Yang et al. [54]
  • Patch Clamp Recording of Ion Channels - Brown et al. [55]
  • Cation Transport in Xenopus Oocytes - Dürr et al.[56]

Books for Xenopus Research and Protocols

• Normal Table of Xenopus Laevis (Daudin), Nieuwkoop and Faber (Third edition), 1994 [57]
  • a systematic and chronological description of Xenopus laevis development
• Early Development of Xenopus laevis: A Laboratory Manual, Sive, Grainger, and Harland, 2000 [58]
  • comprehensive collection of protocols for the study of early development in Xenopus embryos
• The Laboratory Xenopus sp., Green, 2010 [59]
  • a highly detailed manual containing Xenopus husbandry, management, veterinary care, and frog and equipment vendor information
• Xenopus Protocols: Cell Biology and Signal Transduction, Liu (First edition), 2006 [60]
  • step-by-step laboratory instructions, an introduction outlining the principles behind the technique, lists of the necessary equipment and reagents
• Xenopus laevis: Practical Uses in Cell and Molecular Biology, Volume 36, Kay and Peng, 1991 [61]
  • detailed description of a wide range of uses for Xenopus laevis oocytes and embryos in cell and molecular biology
• Transgenic Xenopus: Microinjection Methods and Developmental Neurobiology, Seidman and Soreq, 1997 [62]
  • referenced guide to the use of microinjected embryos studying the role and regulation of nervous system proteins during development
• Atlas of Xenopus Development, Bernardini, Prati, Bonetti, and Scari, 1999 [63]
  • scanning, transmission, and light microscopy images of Xenopus embryonic development
• The early development of Xenopus laevis. An atlas of the histology, Hausen and Riebesell, 1991 [64]
  • detailed histological sections of Xenopus embryonic development
• Color Atlas of Xenopus laevis Histology, Wiechmann and Wirsig-Wiechmann, 2003 [65]
  • central source on the microscopic anatomy of cells, tissues, and major organs of Xenopus laevis

Select Protocol Sections

Animal Husbandry

• obtain frogs and frog housing equipment [66]
• Xenopus Express links [67] - Xenopus Express husbandry [68]
• Xenopus tropicalis and Xenopus laevis environmental parameter standard operating procedure (Kroll lab)

Lab Solutions and Reagents - click each to view expanded list

• culture media
• immunohistochemistry
• in situ hybridization
• fixatives
• DNA/RNA preparation
• embryo manipulation/dissection
• microinjection
• general buffers and salt solutions

Generating Embryos

• inducing egg laying via hCG injection (Vize lab)
• anesthesia, in vitro fertilization, and natural mating of Xenopus tropicalis (Conlon lab)
• benzocaine stock, 100x (Khokha lab)
• in vitro fertilization of Xenopus laevis (Conlon lab)
• high-salt solution for egg laying (Zorn lab/Ron Laskey)
• dejellying embryos (Sive et al. 2000)
• dejellying embryos (Zorn lab)

Transgenesis

• transgenesis in Xenopus laevis - adapted from Amaya et al 2001 (Conlon lab)
• tadpole tail sampling for genomic DNA (Conlon lab)
• Production of transgenic Xenopus laevis by restriction enzyme mediated integration and nuclear transplantation. Amaya E, Kroll K. J Vis Exp. 2010 Aug 21;(42). [69]
• A method for generating transgenic frog embryos. Ishibashi S, Kroll KL, Amaya E. Methods Mol Biol. 2008;461:447-66. [70]
• A method for generating transgenic frog embryos. Amaya E, Kroll KL. Methods Mol Biol. 1999;97:393-414. [71]

In Situ Hybridization

• in situ hybridization, brief version (Harland lab)
• whole-mount in situ hybridization (Conlon lab)
  • in situ checklist (Conlon lab)
• fluorescent in-situs and FCIS (Vize lab)
  • Wholemount embryo FISH / Double FISH
  • Flourescin Tyramide Synthesis
  • Cy3 Tyramide Synthesis
  • FCIS

Immunohisochemistry

• wholemount antibody staining (CSH Protocols) (Wallingford lab)
• wholemount antibody staining - alkaline phosphatase detection (Conlon lab)
• wholemount antibody staining - adapted from Dan Weeks' protocol (Conlon lab)
• immunostaining sectioned embryos (Conlon lab)
• hydrochloric acid antigen retrieval (Zorn lab)

Histology

• cryosectioning Xenopus embryos (Conlon lab)

Other Embryo Staining Protocols

• benzidine-peroxidase staining for blood (Conlon lab)
• benzidine-peroxidase staining for blood (Thomsen lab)
• apoptosis via TUNEL (Veenstra lab)
• TUNEL staining of whole Xenopus embryos - Harland protocol (Conlon lab)

Other Immuno Protocols and Protein Protocols

• immunoprecipitation (Stukenberg lab)
• immunofluorescence with biotinylated antibodies (Stukenberg lab)
• Purifying Polyclonal Antibodies using Affinity Columns/Chromatography
• Making an Affinity Column
• Running an Affinity Column
• whole embryo protein extraction with freon (Conlon lab)
• SDS-PAGE gels (Conlon lab)
• western blot protocol (Conlon lab)
• silver staining protein gels (Stukenberg lab)

Nucleic Acid Protocols

• RNA Isolation
  • Preparation of RNA Using Proteinase K/LiCl (Sive et al. 2000)
  • Preparation of RNA (In Vitro Transcription) (Sive et al. 2000)
• DNA Isolation
  • Extraction of DNA from Single Embryos (Sive et al. 2000)
  • Isolation of DNA from Red Blood Cells (Sive et al. 2000)

Oocyte Transfer Technique (Heasman/Wylie labs)

• Part 1: Choosing Oligodeoxyribonucleotides (ODNs)
• Part 2: ODN Modification
• Part 3: Host Transfer Technique
• Part 4: Fertilization and Development

Xenopus Oocyte and Egg Extracts

• crude interphase egg extract (Shechter lab)
• isolation of chromatin from egg extract and histone recovery (Shechter lab)
• preparation of cycling egg extract (Shechter lab)
• cycling extracts, mike's protocol (Stukenberg lab)
• cycling extracts, sara's protocol (Stukenberg lab)
• CSF extract, mike's protocol (Stukenberg lab)
• CSF extract, sara's protocol (Stukenberg lab)
• assaying H1 kinase in extracts (Stukenberg lab)

Xenopus Tissue Culture

• tissue culture of Xenopus cell lines S3, XTC (Stukenberg lab)
• isolation of mitotic chromosomes from XTC cells (Stukenberg lab)
• in-vitro kinetochore-microtubule binding assays (Stukenberg lab)