Study on anti-hyperlipidemia mechanism of high frequency herb pairs by molecular docking method

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1 Vol. 40 No. 12 June 2015 *,,,, (, ) A HMG-CoA reductase α PPAR-α Niemann-Pick C1 like 1 NPC1L1 3 LibDock RMSD 3 A Study on anti-hyperlipidemia mechanism of high frequency herb pairs by molecular docking method JIANG Lu-di HE Yu-su CHEN Xi TAO Ou LI Gong-yu ZHANG Yan-ling * Beijing University of Chinese Medicine Research Center of Traditional Chinese Medicine information Engineering Beijing China Abstract Traditional Chinese medicine TCM has definitely clinical effect in treating hyperlipidemia but the action mechanism still need to be explored. Based on consulting Chinese Pharmacopoeia 2010 all the lipid-lowering Chinese patent medicines were analyzed by associated rules data mining method to explore high frequency herb pairs. The top three couplet medicines with high support degree were Puerariae Lobatae Radix-Crataegi Fructus Salviae Miltiorrhizae Radix et Rhizoma-Crataegi Fructus and Polygoni Multiflori Radix-Crataegi Fructus. The 20 main ingredients were selected from the herb pairs and docked with 3 key hyperlipidemia targets namely 3-hydroxy-3-methylglutaryl coenzyme A reductase HMG-CoA reductase peroxisome proliferator activated receptor-α PPARα and niemann-pick C1 like 1 NPC1L1 to further discuss the molecular mechanism of the high frequency herb pairs by using the docking program LibDock. To construct evaluation rules for the ingredients of herb pairs the root-mean-square deviation RMSD value between computed and initial complexes was first calculated to validate the fitness of LibDock models. Then the key residues were also confirmed by analyzing the interactions of those 3 proteins and corresponding marketed drugs. The docking results showed that hyperin puerarin salvianolic acid A and polydatin can interact with two targets and the other five compounds may be potent for at least one of the three targets. In this study the multi-target effect of high frequency herb pairs for lipid-lowering was discussed on the molecular level which can help further researching new multi-target anti-hyperlipidemia drug. Key words hyperlipidemia herb pairs association rule molecular docking doi /cjcmm ( , ) ; *,,,Tel: ( 010) , collean_zhang@ 163. com,,,tel: , jiangludi_52@ 163. com 2413

2 Vol. 40 No. 12 June 2015 total cholesterol TC low % density lipoprotein cholesterol LDL-c 2 triglyceride TG high % density lipoprotein cholesterol HDL-c 3 LDL-c 1. 3 TG A HMG-CoA reductase α PPAR-α Niemann-Pick C1 like 1 NPC1L1 2 3 www. rcsb. org /pdb /home /home. do PDB 3CD7 HMG-CoA ph KDU PPAR-α ph QNT NPC1L1 ph Discovery Studio 4. 0 DS Clean Protein 3CD7 A B PDB http / / 3KDU B 3QNT A CHARMM 1. 3 ph 13 3 mol ph 1. 2 Apriori association rule Apriori LibDock Conformation Method BEST Docking Preferences High Quality 2414

3 rootmean-square deviation RMSD RMSD Apriori RMSD 3 1 LibDock Score 1 3QNT NPC1L1 Table 1 High frequency herb pairs analyzed by association rule Ezetimibe NPC1L1 NPC1L1 receptor inhibitor The binding database 8 DS No. /% From Receptor Cavities Ezetimibe LibDock DrugBank http / / - www. drugbank. ca / HMG-CoA 10 5 atorvastatin fluvastatin pitavastatin pravastatin simvastatin PPAR-α - 5 aleglitazar bezafibrate clofibrate fenofibrate gemfibrozil NPC1L1 ezetimibe Analyze 11 3 Ligand Poses LibDock Score % 2 3CD7 3KDU 3NQT Ezetimibe 2 LibDock 3 Table 2 Binding pockets and corresponding calculated results of the three targets by LibDock No. PDB 1 HMG-CoA reductase 3CD PPAR-α 3KDU NPC1L1 3QNT

4 Vol. 40 No. 12 June = 80% Table 3 Key amino acid in active pocket interaction with marketed drugs HMG-CoA reductase B ARG590 A LYS735 B LYS692 B ASP690 B SER684 A LEU853 A LEU857 A LEU562 B VAL683 A HIS752 A GLU559 B ARG590 A LYS735 B LYS692 B ASP690 PPAR-α B HIS440 B THR279 B SER280 B ALA333 B CYS276 B TYR334 B LYS358 B GLU282 B CYS276 B VAL332 B ILE354 B LEU321 B CYS275 NPC1L1 A SER53 A GLY212 A LEU52 A SER102 A SER46 A B A B A LEU49 A PRO215 A LEU213 A LEU52 A ILE Table Interactions of 20 traditional Chinese medicine compounds with the 3 targets CAS HMG-CoA reductase PPAR-α NPC1L1 hyperin ursolic acid apigenin luteolin quercetin puerarin uaidzein daidzin A kudzu root glucoside A B kudzu root glucosideb Ⅱ A tanshinone Ⅱ A cryptotanshinone tanshinol A salvianolic acid A B salvianolic acid B stilbene glycoside resveratrol polydatin emodin physcion

3 A NPC1L1 Ezetimibe 1 ~ 3 A - B - 3 A ezetimibe NPC1L1 3 4 3 1 HMG-CoA TC LDL-C A B HMG-CoA 13 Fig.

5 HMG-CoA A PPAR-α NPC1L1 CoA B SER684 B ASP690 LYS692 B VAL683 A GLU559 1 A PPAR-α B CYS276 B THR279 ALA333 B HIS440 B CYS276 2 NPC1L1 A SER53 A GLY212 A ILE105 A LEU52 A PRO215 3 B HMG-CoA B ARG590 A GLU559 NPC1L1 Ezetimibe 3 A A B A LEU49 Fig. 3 A NPC1L1 Ezetimibe 1 ~ 3 A - B - 3 A ezetimibe NPC1L HMG-CoA TC LDL-C A B HMG-CoA 13 Fig. 1 Docking results A and interactions B between HMG-CoA HMG-CoA reductase and stilbene glycoside initial ligand 3 NPC1L1 Ezetimibe Docking results A and interactions B between NPC1L1and polydatin daidzin Ezetimibe 19 HMG- TC TG LDL HMG- CoA PPAR-α A B NPC1L

6 Vol. 40 No. 12 June Fig. 4 - A - B - C The relational graphs of hit compounds of high frequency herb pairs Puerariae Lobatae Radix-Crataegi Fructus A Salviae Miltiorrhizae Radix et Rhizoma-Crataegi Fructus B and Polygoni Multiflori Radix-Crataegi Fructus C and the corresponding targets 25 HMG-CoA 4 PPAR-α Ezetimibe J D J D J J J J J J J J J J J HMG-CoA... A J

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