Aerobic heat shock activates trehalose synthesis in embryos of Artemia franciscana

• Published in: FEBS letters Vol. 303; no. 1; pp. 45 - 47
• Main Authors: Clegg, James S., Jackson, Susan A.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 25.05.1992; Elsevier
• Subjects: Analytical, structural and metabolic biochemistry; Animals; Artemia - embryology; Biological and medical sciences; Carbohydrates; Embryo, Nonmammalian - metabolism; Energy Metabolism; Fundamental and applied biological sciences. Psychology; Glycerol - metabolism; Glycerol, Artemia franciscana; Glycogen; Glycogen - metabolism; Heat shock; Hot Temperature; Oses; Other biological molecules; Oxidation-Reduction; Oxygen - metabolism; Substrate Specificity; Trehalose; Trehalose - biosynthesis; Trehalose - metabolism; Trehalose; Glycogen; Glycerol, Artemia franciscana; Heat shock; Embryo; Energy metabolism; Anoxia; Glycerol; Biosynthesis; Artemia; Crustacea; Cytoprotector; Arthropoda; Thermal shock; Cyst; Invertebrata; Branchiopoda
• ISSN: 0014-5793; 1873-3468
• DOI: 10.1016/0014-5793(92)80474-U

Encysted embryos (cysts) of the brine shrimp, Artemia franciscana, contain large amount of trehalose which they use as a major substrate for energy metabolism and biosynthesis for Development under aerobic conditions at 25°C. When cysts are placed at 42°C (heat shock) these pathways stop, and the cysts re-synthesize the trehalose that was utilized during the previous incubation at 25°C, Glycogen and glycerol, produced from trehalose at 25°C, appear to be substrates for trehalose synthesis during heat shock. Anoxia prevents trehalose synthesis in cysts undergoing heat shock. These results are consistent with the view that trehalose may play a protective role in cells exposed to heat shock, and other environmental insults, in addition to being a storage form of energy and organic carbon for development.