Schoenwolf Lab

Recent Publications

Plastic Chicken In Situ Hybridization Sections
Need better results? Have you tried plastic! We describe a novel method that allows reliable detection of in situ hybridization signals in thin sections of plastic embedded embryos. Sections from plastic embedded embryos are thinner and have superior histological quality compared to paraffin, gelatin, agarose embedded sections or cryosections; however, plastic resin traditionally has not been used as an embedding medium following in situ hybridization because of loss of signal. When signal is detected with alkaline phosphatase and NBT/BCIP, the resulting colored precipitate is subject to fading when samples are exposed to organic compounds. The colored precipitate can be redeposited by repeating the NBT/BCIP reaction following plastic sectioning. This recolorization shows no loss of specificity, because signal is detected only where the anti-digoxigenin/alkaline phosphatase conjugated antibody is bound to the riboprobe. Strong signals can be detected without recolorization; however, weaker signals require the recolorization step. This novel method of re-depositing colored precipitate after processing and sectioning allows accurate determination of the location of gene expression and study of this expression in high quality histological sections of early chick embryos.

Transgenic GFP Chicken
100% Green Chickens! We report the first ubiquitous green fluorescent protein expression in chicks using a lentiviral vector approach, with eGFP under the control of the phosphoglycerol kinase promoter. Several demonstrations of germline transmission in chicks have been reported previously, using markers that produce tissue-specific, but not ubiquitous, expression. Using embryos sired by a heterozygous male, we demonstrate germline transmission in the embryonic tissue that expresses eGFP uniformly, and that can be used in tissue transplants and processed by in situ hybridization and immunocytochemistry. Transgenic tissue is identifiable by both fluorescence microscopy and immunolabeling, resulting in a permanent marker identifying transgenic cells following processing of the tissue. Stable integration of the transgene has allowed breeding of homozygous males and females that will be used to produce transgenic embryos in 100% of eggs laid upon reaching sexual maturity. These results demonstrate that a transgenic approach in the chick model system is viable and useful even though a relatively long generation time is required. The transgenic chick model will benefit studies on embryonic development, as well as providing the pharmaceutical industry with an economical bioreactor.

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Disclaimer

The PDF files on this site may be downloaded for personal scientific use only. Please note that these files may be protected by copyright law. Please email Gary Schoenwolf with comments or queries.

Links

Gary Schoenwolf maintains an archive of all papers published. Various papers and book chapters have been reviewed.
To see all schoenwolf publications check PubMed. (search term: Schoenwolf GC)

Books & Software

ISBN: 0-13-857434-0 Laboratory Studies of Vertebrate and Invertebrate Embryos
For upper-level undergraduate/graduate-level courses in Developmental Biology, Embryology, Cell and Developmental Biology in Biology, Zoology, and Cell/Developmental Biology departments.

Laboratory Studies is the most comprehensive laboratory guide available in the field of developmental biology and embryology, and is written to allow students to study material independently--without the need for supplemental materials. It is the only text/manual to integrate a laboratory--combining descriptive and experimental studies on living embryos--with a complete atlas of embryonic development viewed from the most technologically enhanced viewpoints. It features broad coverage (sea urchin, frog, chick, mouse, and pig--all popular educational and research models) and is the only guide to provide detailed descriptions of a wide-range of developing stages.

Instructor exam copy also available.
Available to purchase from Prentice Hall.

ISBN: 0-13-090958-0
Atlas of Descriptive Embryology
For courses in Comparative Embryology/Developmental Biology.

This stand-alone, comprehensive, fully-illustrated atlas of descriptive embryology features over 300 detailed, accurate, and fully labeled illustrations (photomicrographs, line drawings, and orientation drawings). Broad in coverage, it considers many different organisms, and features comparative embryology (i.e., gametogenesis in rat, human, cat, grasshopper, locust; development of Ascaris, sea urchin, starfish, frog, chick, and pig; and the human uterus and placenta). Comprehensive coverage of a large variety of developing organisms exposes readers to many different developmental strategies. Over 300 high-quality photomicrographic illustrations provided enables readers to quickly identify similar structures in their own specimens using side-by-side reference to the atlas. Over 50 valuable line-drawings from classical textbooks present supplemental, interpretive views of photomicrographic illustrations to help readers understand developmental events in four-dimensions--i.e., the three dimensions of space, plus the dimensions of time. Combined glossary, synopsis of development and index are provided. For those in area of biology.

Instructor exam copy also available.
Available to purchase from Prentice Hall.

ISBN: 0-13-594011-7
Embryo: CD Color Atlas for Developmental Biology
For self-study and computer-aided teaching and testing in courses in Developmental Biology.

This CD-ROM for Developmental Biology offers a collection of hundreds of high-quality color photographs of developing frog, chick, and pig embryos.

LabBook Electronic Lab Notebook System
LabBook is an electronic lab notebook developed in the Gary Schoenwolf Lab. It is web based offering access anywhere, and its database is fully searchable.

An introduction to LabBook can be found here.

Mac OS X: Installation instructions are found here.

Other Systems: Download the files here.

Last Modified: June 07 2006
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