Abstract

Forskolin (FORSK), octopamine (OA) and adipokinetic hormone (AKH) stimulate the production of diacylglycerol (DG) in fat body of the locust, Locusta migratoria and the release of DG from fat body into hemolmph. The three effectors also increase the level of cAMP in fat body, but the cAMP content is not proportional to DG production. AKH stimulates the uptake of Ca 2+ by fat body cells and requires the presence of extracellular Ca 2+ to increase cAMP and DG levels in fat body. The production of DG seems to be an energy-dependent process. The uptake of DG by lipophorin (LP) from fat body is also energy-dependent but does not require extracellular Ca 2+.

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