Hyperthermia-induced heat shock response and thermotolerance in postimplantation rat embryos |
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| Authors: | P E Mirkes |
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| Affiliation: | 1. Department of Chemical Engineering, Northeastern University, Boston, MA 02115, USA;2. School of Mechanical, Industrial, and Manufacturing Engineering Oregon State University, Corvallis, OR 97331, USA;1. Marine Biology Research Group, Department of Biology, Ghent University, Ghent, Belgium;2. Laboratory for Aging Physiology and Molecular Evolution, Department of Biology, Ghent University, Ghent, Belgium;3. Centrum for Molecular Phylogeny and Evolution, Ghent University, Ghent, Belgium;4. OD Taxonomy and Phylogeny, Royal Belgian Institute of Natural Sciences, Brussels, Belgium;1. Department of Orthopaedics, Changzheng Hospital, Second Military Medical University, Shanghai 200003, China;2. Department of Orthopaedics, Shanghai Armed Police Force Hospital, Shanghai 201103, China |
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| Abstract: | Postimplantation stage rat embryos (6-10 somites) undergo abnormal development after exposure to a temperature of 43 degrees C for 30 min. A heat shock of 43 degrees C for 30 min also induces the synthesis of a set of eight heat shock proteins (hsps) with molecular masses ranging from 28,000 to 82,000 Da. The synthesis of these hsps is rapidly induced after the heat shock is applied and rapidly decays after embryos are returned to 37 degrees C. A heat shock of 42 degrees C for 30 min has no effect on rat embryo growth and development, but does induce the synthesis of three hsps. The most prominent of these three is believed to be the typical mammalian 70 kDa hsp. Furthermore, a 42 degrees C, 30-min heat shock followed by a 43 degrees C 30-min heat shock leads to partial protection from the embryotoxic effects of a single exposure at 43 degrees C, i.e., thermotolerance. |
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