Review: Hemolymph lipoproteins of crustaceans and chelicerates.
Level 5 - mechanism / opinion, no new human data
Narrative review of comparative animal physiology and biochemistry; Level 5 by non-clinical design analogy.
PubMed 41688009 · doi:10.1016/j.cbpb.2026.111202
What was done
This narrative review synthesizes literature on hemolymph lipoproteins across crustaceans (decapods, isopods, amphipods, copepods, branchiopods, cirripedes) and chelicerates (ticks, mites, spiders, scorpions, horseshoe crabs). It examines historical findings, tissue sites of synthesis, functional roles in adults and developing embryos, genetic encoding, and amino acid sequences characterized over the past two decades.
What was found
Arthropod hemolymph lipoproteins occur in high-density lipoprotein (HDL, density: 1.063–1.21 g/ml) and very high-density lipoprotein (VHDL, density >1.21 g/ml) fractions. Sex-independent lipoproteins mediate clotting, pattern recognition, and the transport of lipids, hormones, vitamins, heme, and pheromones. Female-specific lipoproteins are synthesized in the ovary, hepatopancreas, fat body, or mid-gut, cleaved into subunits, secreted into hemolymph, and incorporated into oocytes by receptor-mediated endocytosis to nourish developing embryos. Decapod female-specific lipoproteins (vitellogenin/apocrustacein) belong to the apolipoprotein B-like family, whereas those in other crustacean groups and chelicerates belong to the vitellogenin-like family of large lipid transfer proteins. The abstract reports no quantitative statistical synthesis.
Why it matters
The review consolidates decades of comparative biochemistry on arthropod lipid transport, detailing functional divergence and evolutionary classification of major lipid transfer proteins across non-insect arthropod taxa.
Limits
This is an unsystematic narrative review of comparative animal biochemistry without formal search criteria, study appraisal, or statistical pooling. No sample sizes or experimental numerical data are provided in the abstract.
Cited by
- supports Apolipoprotein B (apoB) is an ancient protein whose lineage traces back evolutionarily to lobsters.