Ziegler_2006_Insect.Biochem.Mol.Biol_36_264

Reference

Title : Lipid uptake by insect oocytes - Ziegler_2006_Insect.Biochem.Mol.Biol_36_264
Author(s) : Ziegler R , Van Antwerpen R
Ref : Insect Biochemistry & Molecular Biology , 36 :264 , 2006
Abstract :

Approximately 30-40% of the dry weight of an insect egg consists of lipid, mostly triacylglycerol (TAG). Although this lipid is essential for the energy needed by the developing embryo, little is known about the mechanism that leads to the accumulation of TAG in the insect egg. Insect oocytes can readily synthesize TAG from free fatty acids (FFAs) and glycerol, however, de novo synthesis of FAs by the oocyte is marginal. Hence, FAs have to be imported from the fat body or the diet. Insect hemolymph contains two lipoproteins that transport lipids, lipophorin and vitellogenin. Both are taken up via endocytosis by the oocyte, however, this provides only about 10% of the egg's lipid reserves. The rest is unloaded from circulating lipoprotein particles at the oocyte surface in the form of diacylglycerol (DAG), the major lipid transport form in insects, or as FFA. The mechanism of lipoprotein unloading at the oocyte surface is currently unclear. Possible roles of the lipid transfer particle (LTP), FA transporters, and lipoprotein lipase activity are discussed.

PubMedSearch : Ziegler_2006_Insect.Biochem.Mol.Biol_36_264
PubMedID: 16551540

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Citations formats

Ziegler R, Van Antwerpen R (2006)
Lipid uptake by insect oocytes
Insect Biochemistry & Molecular Biology 36 :264

Ziegler R, Van Antwerpen R (2006)
Insect Biochemistry & Molecular Biology 36 :264