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The computer-aided design was used to simulate the docking of PDGF receptor with known active compounds, and the active groups that can bind to key sites were identified by analyzing the key amino acid residue fragments that exerted active effects on the target proteins. The natural product oleanolic acid was used as the parent, and the active group was introduced into the 2-position, and the C-28 carboxyl group was esterified and amidated. A series of oleanolic acid analogues targeting PDGF receptor inhibitors were designed and synthesized. Their structures were confirmed by MS and NMR. Through MTT assay, SGC-7901 and A549 cells were selected for preliminary in vitro anti-tumor activity screening. PDGF receptor protein inhibition test was performed on Ⅰ3 and Ⅱ5 by FPIA. The activity tests showed that Ⅰ3 and Ⅱ5, compared with the positive control drug, had stronger inhibition. FPIA test showed that Ⅱ5 and PDGF receptor protein had good binding ability. The newly synthesized oleanolic acid analogues have significantly higher antitumor activity than the parent compound and deserve further study.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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