ABSTRACT
Aim To explore the hypolipidemic mechanism of the total phenylpropanoid glycoside from Ligustrum robustum (Roxb. ) Blume (LRTPG) on hyperlipidemic hamsters using label-free quantitative proteomic technique. Methods The total protein was extracted from livers of model group and the group treated with LRTPG for label-free quantitative proteomics research. Results The proteomic data showed that a total of 2231 proteins were identified. And 549 proteins were found to be differentially expressed between model group and group treated with LRTPG. Among the 549 proteins, 93 proteins were up-regulated and 59 proteins were down-regulated, and 397 proteins had quantitative values only in model group or drug-administered group. Further, gene ontology (GO) analysis indicated that those differentially expressed proteins were primarily involved in an array of biological processes including metabolism, transport, oxidation-reduction, phosphorylation, signal transduction and lipid metabolism. KEGG pathway analysis revealed that these proteins were involved in several signal pathways including oxidative phosphorylation, non-alcoholic fatty liver dis-ease, PI3K-Akt, cAMP, and cGMP-PKG pathway. And some of these proteins were much related to the lipid metabolism, such as CD36, PK, HSS, GCK, ApoA I, Acly and FABP5. Conclusion The hypolipidemic effect of LRTPG may be related to CD36, PK, HSS, GCK, ApoA I, Acly and FABP5.