Study on PK/PD model for traditional Chinese medicine biopharmaceutics based on principle of "correspondence of prescriptions and syndromes"

In the principle of "correspondence of prescription and syndrome", this article focuses on key technical issues of traditional Chinese medicine (TCM) biopharmaceutis by using the integrated pharmacokinetic and pharmacodynamic model: (1) As the prescription formulation and compatibility of TCM compounds could be influential to the in vivo pharmacokinetics of chemical components of TCMs, and closely related to therapeutic and adverse effects, how to describe these actions in a biopharmaceutics model? (2) As there are differences between pharmacokinetic processes in the normal and pathological states, how to express characteristic "syndromes" in an animal model? (3) As prescriptions work to reduce and transform syndromes, how o confirm the type and amount of effective substances in case of physiological and pathological indicators and drug distribution in a dynamic corresponding state. In response to the above key issues, we proposed the TCM biopharmaceutic study model based on PK/PD. (1) The integrity of TCMs was better expressed with the effect at the core, supplemented with the component pharmacokinetics; (2) An integrated pharmacokinetic and pharmacodynamic system was established on the basis of pharmacokinetics and pharmacodynamics of many major effective components; (3) AK/PD mathematical function with the three-phase synchronous characterization of "time-concentration-effect" was established by using the data mining techniques, to explore the biopharmaceutic principle of "correspondence of prescriptions and syndromes", in which prescriptions are only required for syndromes, whereas no prescription is required in case of no syndrome.