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Journal of Lipid Research, Vol. 3, 421-426, October 1962
Copyright © 1962 by Lipid Research, Inc.

Fat transport in the locust

Alisa Tietz

Israel Institute for Biological Research, Ness-Ziona, Israel

When fat-body tissue from locusts was incubated with palmitate-1-C¹⁴ in phosphate-saline, the acid was readily taken up by the tissue; 80-90% of that taken up was esterified and recovered in the glyceride fraction. When the prelabeled tissue was incubated in hemolymph, glycerides were released from the tissue into the medium. The effect of hemolymph was specific; glycerides were not released into phosphate-saline, bovine serum or buffered solutions of bovine serum albumin or egg albumin. The release of glycerides was inhibited by fluoride and by cyanide. The amount of glyceride released was proportional to the amount of hemolymph that was added. Effectiveness of the hemolymph in this regard was not affected by prolonged dialysis, but was destroyed by heating. The specific activity of the glycerides released was at least 10 times higher than the average specific activity of the glycerides inside the tissue. A considerable fraction of the released glycerides was incorporated into the lipoprotein fraction of the hemolymph. Uptake of glycerides by fat-body tissue was also demonstrated.

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