вход по аккаунту



код для вставкиСкачать
Archives of insect Biochemistry and Physiology 1-2 (1986)
The papers contained in this volume were presented by invited speakers
at the symposium on Regulation of Gene Expression by Juvenile Hormone
and Ecdysone held in Fort Collins, on the campus of Colorado State University, July 18-20, 1985. This gathering was organized as a satellite symposium
to the 10th International Symposium on Comparative Endocrinology held in
Copper Mountain.
The focus of the Fort Collins gathering was to provide a forum for the
dissemination of information from the rapidly progressing investigations into
the area of gene expression by the two major insect hormones, juvenile
hormone (JH)and ecdysone, that regulate many of the processes involved in
insect development and reproduction. Insects have provided eager investigators with a vast array of unique systems for probing the roles of JH and
ecdysone which can act antagonistically, synergistically, or independently in
expressing or suppressing gene activity. Insect polytene chromosomes have
been exploited to study site-specific gene activation by JH and ecdysone.
Transposable elements provide a system for analyzing gene expression by
repositioning genes where they can be influenced by a variety of regulatory
sequences. Insect imaginal discs have an elaborate program of sequential
production of proteins that can be expressed in response to changes in the
hormonal environment. Some insect genes can be primed initially by the
hormone but are not expressed until hormone levels decline or the hormone
disappears and reappears. These instances suggest a complexity of regulatory regions that, while not completely elucidated in insect systems, is a
feature that is less well defined in other systems. The regulation by JH and
ecdysone of these targets and the mechanism of action of JH and ecdysone
through hormone receptors, specific acceptor proteins, and regulatory sequences associated with specific genes were the foci of the presentations and
discussions of the meeting and the papers included in this volume. Informal
discussions, round-table forums, and open presentations on some of the
major themes of the meeting such as insect gene organization and P elements, insect hormone receptors, and the regulation of developmental programs allowed for a free exchange of recent results in these rapidly evolving
areas of study. Unfortunately, this volume is restricted to the formal presentations but the authors of these papers convey the vigor, excitement, and
enthusiasm of the entire symposium.
We thank all of the attendees for their participation in this worthwhile and
stimulating meeting (see page x for a list of participants). We specifically
acknowledge the contributions of the following Colorado State University
offices and academic units: Academic Vice-PresidentiProvost; Cellular and
Molecular Biology Program; College of Agricultural Sciences; College of
Natural Sciences; College of Veterinary Medicine and Biomedical Sciences;
Department of Entomology; Department of Zoology; Agricultural Experi0 1986 Alan R. Liss, Inc.
ment Station, and Vice-president for Research. Additional support was provided by grants from the Regulatory Biology Program of the National Science
Foundation, Union Carbide Agricultural Products Company, Inc. , Shell Development Company, and Monsanto Agricultural Products Company. Without the support of the above contributors, this meeting would not have been
P. Elaine Roberts
Thomas A. Gore11
Richard T. Mayer
Без категории
Размер файла
103 Кб
940030702, arch
Пожаловаться на содержимое документа