Opioid analgesics are still irreplaceable for the treatment of moderate to severe pain, but the usage is limited because of their dependence and other adverse reactions. There is an urgent need for a new generation of efficient and safe opioid analgesics. At present, many studies on the interaction between μ and δ opioid receptors have been reported, and the existence of μ/δ dimer also provides a molecular basis for the receptor interaction. The design of molecules with double activation effect on μ and δ types is the new development direction of opioid drugs with strong analgesic effect and little or weak adverse reactions. In this paper, the research progress of μ/δ dual agonists in recent years is reviewed according to the classification of design strategy of μ/δ dual agonist.
| 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 |