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Clinical efficacy and mechanism of Qishen Yiqi Dripping Pills(QSYQ) have been well researched, but the compatibility mechanism underlying its therapeutic effect still requires further analysis. This study aims to explore the compatibility mechanism of QSYQ in treating myocardial ischemia. UPLC-Q-Exactive Orbitrap-MS technique was used to obtain the absorbed blood components of QSYQ. Target proteins of the absorbed components were collected and screened using TCMSP, TCMIP, and SwissTargetPrediction databases. Disease proteins related to myocardial ischemia were obtained through GeneCards, OMIM, and DisGeNET databases. Core targets and core components were obtained using online plotting software Venny 2.1.0, STRING, and Cytoscape 3.9.1 software. David database was used for GO functional annotation and KEGG pathway enrichment of core targets, obtaining the main pathways of QSYQ in treating myocardial ischemia and drawing visualized network diagrams. The compatibility mechanism was analyzed based on "component-target", "drug-pathway", and "PI3K-AKT" characteristic pathways, and molecular docking was used for validation. This study obtained 42 absorbed blood components of QSYQ, 556 component targets, 1 980 disease targets, 69 core targets, and 15 core components. QSYQ can exert therapeutic effects on myocardial ischemia by regulating proteins such as MAPK1, RELA, SRC, JUN, and STAT3, acting on signaling pathways such as HIF-1, PI3K-AKT, Toll-like, MAPK, VEGF, etc. The interaction network diagrams of "component-target" and "drug-pathway" preliminarily elucidated the synergy among the four drugs in this prescription at the level of targets and pathways. The PI3K-AKT characteristic pathway indicated that the sovereign drug Huangqi(Astragali Radix) and minister drug Danshen(Salviae Miltiorrhizae Radix et Rhizoma) could regulate most targets in this pathway, while the assistant drug Sanqi(Notoginseng Radix et Rhizoma) cooperated with Huangqi and Danshen on IL6 and AKT proteins, and the envoy drug Jiangxiang(Dalbergiae Odoriferae Lignum) acted on AKT and RXRA proteins, with all drugs acting synergistically on proteins such as AKT, RXRA, NFKB to regulate cell survival and promote angiogenesis. Molecular docking indicated that hydrogen bonding and hydrophobic interactions might be the main forms of action, also validating the distribution of binding energy of the PI3K-AKT signaling pathway. This study analyzed the compatibility connotation of QSYQ from multiple dimensions including drugs, components, targets, and pathways, providing reference basis for the study of the mechanism of action and compatibility rules of QSYQ.

Ethnopharmacological Relevance: Jinhongtang, a traditional Chinese medicine (TCM) formula consisting of dry stems of Rheum palmatum L. (Polygonaceae) and Sargentodoxa cuneata (Oliv.) Rehder & E.H.Wilson (Lardizabalaceae) and whole plant of Taraxacum mongolicum Hand.-Mazz. (Asteraceae), is widely used for the treatment of infection diseases including severe sepsis and COVID-19., Aim of the Study: The present study aimed to explore the compatibility mechanism in the prescription of Jinhongtang based on the pharmacokinetic interaction., Materials and Methods: CLP-induced sepsis mice and LPS-induced RAW264.7 cells were used to explore the anti-inflammatory effect of Jinhongtang and herbs in this clinical prescription. Pharmacokinetics of active components in Jinhongtang (Rhein, Emodin and Aloe emodin) was studied in rats. In vitro analysis of metabolic pathways and interactions mediated by metabolic enzymes were conducted using human liver microsomes (HLMs) and recombinant UGT isoforms., Results: Jinhongtang exhibited much more potent anti-inflammatory effect than its single herbs on CLP-induced sepsis mice and LPS-induced RAW264.7 cells. Next, the bioavailability of active ingredients (Rhein, Emodin and Aloe emodin) in R. palmatum was significantly improved through reduced metabolic clearance when co-administered with S. cuneata and T. mongolicum as Jinhongtang during the in vivo pharmacokinetic study, which presented the rational herbal compatibility mechanism. In detailed, the components in S. cuneata and T. mongolicum including Sargentodoxoside A, Chanitracin Ia, Quercetin and Luteolin inhibited the UGT1A9-mediated glucuronidation of active ingredients in R. palmatum, with K i values of 2.72 μM, 1.25 μM, 2.84 μM and 0.83 μM, respectively., Conclusion: T. mongolicum and S. cuneata, the adjuvant herbs of Jinhongtang, could reduce the metabolic clearance of key active components of R. palmatum, prolong their action time and further enhance their anti-inflammatory activity via inhibition of UGTs. Our findings provided deep insight for the rational compatibility of TCMs and useful guidance for the development of TCM formula., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier B.V. All rights reserved.)

Gegen Qinlian Decoction(GQD) is commonly used for the clinical treatment of ulcerative colitis(UC) and other diseases, but its compatibility mechanism has not been elucidated systematically. In this study, the compatibility mechanism of GQD against UC was revealed based on the blood components in the mouse model of UC by network pharmacology. The targets of blood components of GQD were collected to construct a protein-protein interaction(PPI) network. The key targets were screened out according to the topological parameters of the network, and 16 core components were identified, such as puerarin, chrysin, berberine, and liquiritigenin, based on the key targets in the blood components. Functional enrichment analysis was performed on the key targets, and the regulatory network of the prescription was constructed, which elucidated the compatibility mechanism of the Chinese herbal drugs in the prescription at both target and pathway levels. The results showed that all the Chinese herbal drugs in GQD had heat-clearing and toxin-removing effects, and the four Chinese herbal drugs synergistically exerted their effects by co-regulating protooncogenes, such as FOS and JUN, and characteristically regulating signal transducer and activator of transcription 3(STAT3) and interleukin-6(IL-6). The pathway analysis revealed that GQD exerted heat-clearing and toxin-removing effects mainly by regulating the inflammatory response-related signaling pathways, such as Toll-like receptor, tumor necrosis factor(TNF), and mitogen-activated protein kinase(MAPK). Furthermore, the study revealed the synergistic effects of Chinese herbal drugs in GQD based on the TNF signaling pathway. The results showed that the sovereign drug Puerariae Lobatae Radix played a primary role in the regulation of targets in the TNF signaling pathway, the minister drugs Scutellariae Radix and Coptidis Rhizoma showed the synergistic effects with Puerariae Lobatae Radix, and the assistant and guiding drug Glycyrrhizae Radix et Rhizoma supported Puerariae Lobatae Radix in the key target NF-κB and the process of cell adhesion. The drugs in GQD showed good characteristics of compatibility in the TNF signaling pathway. This study is expected to provide the basis for the further exploration of the compatibility mechanism of GQD.

Bupleurum chinense DC (Chaihu) -Paeonia lactiflora Pall (Baishao) is among the most accepted herb pairs in many classic antidepressant prescriptions. Our previous study has shown that the Chaihu-Baishao herb pair (CBHP) had a better antidepressant effect than Chaihu or Baishao. Nevertheless, the synergistic antidepressant mechanism of this herb pair was not clearly understood. This study aimed to investigate the compatibility mechanism of Chaihu and Baishao for treating depression through a strategy of non-targeted metabolomics combined with targeted quantitative analysis and molecular biology techniques. First, the compatibility effects of CBHP were assessed by the chronic unpredictable mild stress (CUMS) rat model. Next, cortex metabolomics based on ultra-high-performance liquid chromatography combined with quadrupole orbitrap mass spectrometry (UPLC-Q-Orbitrap/MS) was used to discover the metabolic pathway that was synergistically regulated by CBHP. Based on the results of metabolomics analysis, metabolites were quantitatively validated by UPLC-MS/MS combined with the MRM mode in the crucial metabolic pathway. In addition, the signaling pathway associated with this metabolic pathway was detected by molecular biology techniques to further identify the biological meaning of the crucial metabolite on the synergistic antidepressant effect of CBHP. The antidepressant effect of CBHP was significantly better than that of Chaihu or Baishao single administrated in the behavioral test. According to cortex metabolomics, a total of 21 differential metabolites were screened out, and purine metabolism was selected as the crucial metabolic pathway by the enrichment analysis of differential metabolites. Subsequently, purine metabolism was confirmed as disorder in the CUMS group by targeted quantitative analysis, CBHP regulated more purine metabolites (six) than individual administration (two and two). The results showed that purine metabolism was modulated by CBHP through synergistically decreasing xanthine levels and inhibiting the conversion of xanthine dehydrogenase (XDH) to xanthine oxidase (XOD). Finally, the synergistic regulation effect of CBHP on xanthine synthesis was found to be related to inhibition of malondialdehyde (MDA) production, Nod-like receptor protein 3 (NLRP3) inflammasome expression, and interleukin (IL)-1 β , IL-6, and tumor necrosis factor (TNF)- α secretion. The present study demonstrated that the regulation of purine metabolism, the suppression of oxidative stress, and inflammatory responses in the cortex were involved in the synergistic antidepressant effect of CBHP., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Chen, Li, Qin, Du and Zhou.)

Ethnopharmacological Relevance: Fangji is an ancient combinatorial formula. The compatibility mechanisms that how component herbs of Fangji work cooperatively to achieve the executive framework remain unexplored., Aim of the Study: Toexplore compatibility mechanism and systematical effects of Fangjis by taking Wenxin Keli decoction (WXKL), a classical Fangji constituted by Codonopsis Radix, PolygonatiRhizoma, Notoginseng Radix Et Rhizoma, Ambrum, and Nardostachyos Radix Et Rhizoma., as example., Main Methods: Here, we employed bioinformatics approach, including cluster analysis, cooperative module pair analysis, primary module identification, and proximity examination among target profile of herbs, to investigate compatibility characterization and anti-arrhythmia mechanism of WXKL. Finally, core mechanisms of WXKL were validatedby in vivo experiments., Results: As a result, we identified 695 putative target proteins and 27 clusters (W-modules) inWXKL target network (W-network), in which W-module 1, 2, 4, 8, 10 were primary modules. The cooperative module pairs were W-module 2 and 4, W-module 2 and 8, and W-module 2 and 1, all of which existed in Codonopsis Radix- or Notoginseng Radix Et Rhizoma.-condition. And Nardostachyos Radix Et Rhizoma only yielded cooperation between W-module 1 and 2. The proximity of herbs' target profiles of Codonopsis Radix and Notoginseng Radix Et Rhizoma were similar, and Nardostachyos Radix Et Rhizoma and Ambrum were similar. For the compatibility framework, Codonopsis Radix general regulated 70.67% targets and majority W-modules (81.48%) as sovereign herb, contributing to primary therapeutic effect, mainly involving neurohormonal regulation, vasomotor, inflammation and oxidative stress. Other herbs assisted Codonopsis Radix to enhance major outcomes through common modules, and acted as complementary roles through unique process including mitotic cell cycle, biosynthetic and catabolic process, etc. Furthermore, WXKL regulated 66.67% hub proteins of arrhythmia-network, 68.18% and 47.37% proteins in primary arrhythmia-module 1 and 2, mainly involving ion channel activity, neurohormonal regulation, and stress response processes, to constitute regulatory network focusing on cardiovascular, renal, nervous system, to reverse the pathological process of arrhythmia. In vivo experiments demonstrated WXKL can attenuate adrenergic activation induced sympathetic atrial fibrillation by inhibiting calmodulin expression (CaM) and ryanodine receptor 2 (RYR2) phosphorylation to regulate neurohormonal action., Conclusion: This strategy provided an overarching view of anti-arrhythmia mechanism of WXKL and its internal compatibility, and may facilitate the understanding of compatibility in Fangjis from the perspectives of modern biology., (Copyright © 2021 The Author(s). Published by Elsevier B.V. All rights reserved.)

Objectives: To reveal the compatibility mechanism and material basis of Danggui Buxue decoction (DBD) against anaemia., Methods: UHPLC-Q-Exactive-MS based serum metabonomics was applied to decipher the compatibility of DBD against anaemia mice. Meanwhile, network pharmacology was used to reveal the material basis of DBD based on the obtained differential metabolites., Key Findings: Metabonomic results indicated that 17 serum differential metabolites were closely related to anaemia. DBD, Huangqi (HQ) and Danggui (DG) could significantly ameliorate 13, 6 and 4 serum metabolites in anaemia mice, respectively. 17 serum differential metabolites were linked 140 corresponding targeted genes obtained by Metscape. In addition, 6649 targets genes related anaemia were obtained by network pharmacology. At last, six important targets genes were screened as hopeful targets for the treatment of anaemia through integrating them. Molecular docking further illustrated that eight active components of DBD including mairin, hederagenin, etc. played important roles in treating anaemia., Conclusions: DBD produced the best effect by compatibility with HQ and DG in treating anaemia. The approach provided the insights into the compatibility mechanism and material basis of TCM in treating anaemia coupling network pharmacology., (© The Author(s) 2021. Published by Oxford University Press on behalf of the Royal Pharmaceutical Society. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)

The combination of Carthamus tinctorius extract (CTE) and notoginseng total saponins (NGTS), namely, CNP, presents a synergistic effect on myocardial ischemia protection. Herein, comparative pharmacokinetic studies between CNP and CTE/NGTS were conducted to clarify their synergistic mechanisms. A large volume direct injection ultra-high performance liquid chromatography-tandem mass spectrometry (LVDI-UHPLC-MS/MS) platform was developed for sensitively assaying the multi-component pharmacokinetic and in vitro cocktail assay of cytochrome p450 (CYP450) before and after compatibility of CTE and NGTS. The pharmacokinetic profiles of six predominantly efficacious components of CNP, including hydroxysafflor yellow A (HSYA); ginsenosides Rg 1 (GRg 1 ), Re (GRe), Rb 1 (GRb 1 ), and Rd (GRd); and notoginsenoside R 1 (NGR 1 ), were obtained, and the results disclosed that CNP could increase the exposure levels of HSYA, GRg 1 , GRe, GRb 1 , and NGR 1 at varying degrees. The in vitro cocktail assay demonstrated that CNP exhibited more potent inhibition on CYP1A2 than CTE and NGTS, and GRg 1 , GRb 1 , GRd, quercetin, kaempferol, and 6-hydroxykaempferol were found to be the major inhibitory compounds. The developed pharmacokinetic interaction-based strategy provides a viable orientation for the compatibility investigation of herb medicines.

Background: Shengmai Formula (SMF) is widely used to treat cardiovascular disease such as chronic heart disease, coronary atherosclerotic heart disease, viral myocarditis, and others. Our previous studies have shown that OATP1B1/1B3 mediates the interactions between ophiopogon D and ginsenoside Rb1/Rd, which are the major active components in SMF. The herb-drug interactions that involve sodium taurocholate co-transporting polypeptide (NTCP) have been drawing increasing amounts of attention., Purpose: The aim of the present study was to investigate the interactions of the major effective components in SMF mediated by NTCP., Methods: By using NTCP-overexpressing HEK293T cells and liquid chromatograph-mass spectrometer (LC-MS) analytical methods, we investigated the impact of the four main effective fractions and the 12 main effective components in SMF on NTCP-mediated sodium taurocholate (TCNa) uptake. The interactions of these effective components in SMF mediated by NTCP were further studied., Results: The main effective fractions, ginseng total saponins (GTS), ophiopogon total saponins (OTS), ophiopogon total flavonoids (OTF), and fructus schisandrae total lignans (STL), all exhibited a certain inhibitory effect on the uptake of TCNa. Among the 12 main effective components, only ginsenoside Rg1, ophiopogon D', and schizandrin A showed inhibition of TCNa uptake, with IC 50 values of 50.49 ± 4.24 μM, 6.71 ± 0.70 μM, and 45.80 ± 3.10 μM, respectively. Additionally, we found that ginsenoside Re and schizandrin B could be transported by NTCP-overexpressing HEK293T cells, and that the uptake of ginsenoside Re was significantly inhibited by OTS, OTF, STL, ginsenoside Rg1, ophiopogon D', and schizandrin A. The uptake of schizandrin B was significantly inhibited by GTS, OTS, OTF, and ophiopogon D'., Conclusion: Ginsenoside Rg1, ophiopogon D', and schizandrin A are potential inhibitors of NTCP and may interact with clinical drugs mediated by NTCP. Ginsenoside Re and schizandrin B are also potential substrates of NTCP, and their uptake mediated by NTCP was inhibited by the other components in SMF. The interaction of complex components based on NTCP may be one of the important compatibility mechanisms in SMF., (Copyright © 2019 Elsevier GmbH. All rights reserved.)

Background: Herbal compatibility of compound formulas can enhance therapeutic effects or reduce side effects of the monarch drugs, but majority of compatibility mechanisms are still unknown. Sangju-Yin, a well-known Chinese compound formula, is currently used to treat common cold in clinical., Purpose: In this study, we proposed a strategy to explore the compatibility mechanism of Sangju-Yin by investigating P450 enzymes-based metabolic interactions between monarch drugs and the other constituent herbs., Methods: Under the guidance of traditional Chinese medicine theory, the constituent herbs of Sangju-Yin were divided into four groups, including monarch drugs, monarch drugs with addition of minister drugs, monarch drugs with addition of minister and adjuvant drugs, as well as the whole recipe, namely monarch drugs with addition of minister, adjuvant and conductant drugs. Their effects on rats in vivo P450 (CYP1A2, CYP2A3, CYP2C6, CYP2C11 and CYP3A1) activities after oral administration were evaluated using probe drug assay based on LC-MS/MS. Moreover, effects of the four groups of herbs on mRNA expression of P450 enzymes after oral administration, as well as in vitro P450 activities after co-incubation, were investigated to explore the underlying mechanisms., Results: Comparing with monarch drugs, addition of different constituent herbs significantly enhanced CYP1A2 and CYP2C6 activities, and inhibited CYP2A3 and CYP3A1 activities, indicating their possible influences on plasma concentrations of active constituents in the monarch drugs. Mechanism study suggested that these herbs affected P450 activities by transcriptional regulation and/or direct interaction with the enzymes., Conclusion: This study clarified the compatibility mechanism of Sangju-Yin from the aspect of P450 enzymes-based metabolic interactions, which would benefit better understanding of the therapeutic basis of Sangju-Yin., (Copyright © 2019 Elsevier GmbH. All rights reserved.)

Realgar is a mineral traditional medicine with definite efficacy. The function of realgar is detoxicating, insecticiding, eliminating dampness and phlegm, etc. It is widely applied in clinical practice by compatibility medicines. However, the safety and scientificalness of clinical application are questioned because of the toxic effect caused by arsenic compounds. At present, there are still many problems in the research of realgar, which are mainly manifested in three areas: the expression of main components and effective substances are inconsistent; the anti-tumor mechanism is difficult to explain at the molecular level; the mechanism of compatibility is not clear. As a result, realgar and realgar-containing Chinese patent medicines are frequently prohibited from entering the international market, and the reputation of traditional Chinese medicine is also damaged. This paper would analyze the research status of realgar at home and abroad as well as its problems from its main components, effective substances, anti-tumor mechanism and compatibility mechanism. In view of these difficulties, quantum chemical calculation method is proposed to solve them, so as to make up for the shortcomings and limitations of experimental technology and experimental conditions, reduce the cost of realgar research and improve research efficiency. Moreover, it provides inspiration for research of other mineral medicine.

Sangju Ganmao tablet (SGT), a well-known Chinese patent medicine used to treat cold symptoms, is made from eight herbal medicines. In this study, an off-line hydrophilic interaction × reversed-phase two-dimensional liquid chromatography (HILIC × RP 2D-LC) method was developed to comprehensively separate the chemical constituents of SGT. Through optimization of the experimental conditions, a total of 465 peaks were finally detected in SGT, and the structures of 54 selected compounds were fully identified or tentatively characterized by quadrupole time-of-flight mass spectrometry (qTOF-MS) analysis. The established 2D-LC analysis showed high orthogonality (63.62%) and approximate 11-fold improvement in peak capacity (2399 and 1099, obtained by two calculation methods), in contrast to conventional one-dimensional RPLC separation. The eight component herbs of SGT were also respectively separated by using the 2D-LC system, and we found that a total of 12 peaks detected in SGT were not discovered in any component herbs. These newly generated chemical constituents would benefit better understanding of the compatibility mechanism of the component herbs. The strategy established in this study could be used for systematic chemical comparison of SGT and its component herbs, which contributes to exploration of herbal compatibility mechanism.

Shenmai injection (SMI) is derived from traditional Chinese herbal prescription Shendong yin and widely used for treating cardiovascular diseases. Ophiopogonin D (OPD) is one of the main active components of SMI. The hepatic uptake of OPD is mediated by organic anion-transporting polypeptides (OATPs/oatps) and inhibited by some other components in SMI. This study aimed to identify the active components of SMI responsible for the inhibitory effects on hepatic uptake of OPD in rats and explore the compatibility mechanisms of complex components in SMI based on OATPs/oatps. The known effective fractions, the known components in Shenmai Formula, and the fractions obtained from SMI by HPLC gradual-separation technology were individually/combinedly tested for their effects on OPD uptake in rat primary hepatocytes and recombinant OATP1B1/OATP1B3-expressing HEK293T cells. The results indicated that the OPD uptake was inhibited by panaxadiol-type ginsenosides (ginsenoside Rb1 and Rd), but slightly influenced by panaxatriol-type ginsenosides in rat primary hepatocytes and recombinant cells. The fractions of SMI-3-1 (0-11 min) and SMI-3-3 (15-20 min) obtained by HPLC gradual-separation technology were proved to be the major effective fractions that influenced the OPD uptake, and subsequently identified as ginsenoside Rb1 and Rd, respectively. The plasma concentrations of OPD in rats given OPD+ginsenoside Rb1+ginsenoside Rd were higher compared to rats given OPD alone at the same dose. In conclusion, ginsenoside Rb1 and Rd are the major effective components in SMI that remarkably inhibited the hepatic OPD uptake mediated by OATPs/oatps. The interaction of complex components by OATPs/oatps may be one of the important compatibility mechanisms in SMI.

This paper aimed to explore the molecular mechanism of Xingnaojing injection and its scientific connotation of compatibility mechanism from a new perspective on bioinformatics and network biology. Based on the analysis function of intergrative pharmacology platform V1.0, the compatibility mechanism of this prescription was investigated by constructing the herbs-compounds-targets network. Seven hundreds and ninety-five targets from the prescription were screened out, then 302 hub nodes were included in drug targets-disease targets network. Enrichment analysis showed that it was related to MAPK cascade, negative/positive regulation of apoptotic process and other biological functions as well as PI3K/AKT, neurotrophin and other signal pathways. The target functions of different drugs were similar, complementing each other, and belonging to the common signaling pathway with asynergistic effect. Based on analysis of core components-key targets-main pathway network, among totally 25 core components and 29 key targets, musk had 15 and 25 respectively.SLC1A2, AR, PGR, CAT, NMDA receptors and other targets were associated with cerebral infarction. Musk, gardenia and borneol compatibility can play a bidirectional regulation of apoptosis; musk and gardenia showed synergistic effect on Ras signaling pathway, indicating that musk was the main ingredient of the injection and the other three drugs played the role of assistance. This study could not only provide the bioinformatics support in compatibility mechanism of Xingnaojing injection, but also provide theoretical support for its formula rationality., Competing Interests: The authors of this article and the planning committee members and staff have no relevant financial relationships with commercial interests to disclose., (Copyright© by the Chinese Pharmaceutical Association.)

1. This study aimed to investigate the pharmacokinetic interaction of the three ingredients in a traditional Chinese herbal formulation, Sini Decoction, and provide evidence for its compatibility mechanism. 2. First, the effect of liquiritin and 6-gingerol on the pharmacokinetic parameters of aconitine was investigated in rats by using a sensitive and reliable LC-MS/MS method. Then the Caco-2 cell monolayer model and Rhodamine-123 uptake assay were used to investigate the effect of liquiritin and 6-gingerol on the absorption of aconitine and the activity of P-gp. 3. The C max of aconitine increased significantly (p < 0.05) from 10.34 ± 1.99 to 17.68 ± 2.65 ng/mL with the pretreatment of liquiritin (20 mg/kg), and to 17.43 ± 0.96 ng/mL with 6-gingerol (20 mg/kg). When aconitine was co-administered with liquiritin and 6-gingerol, the C max and AUC (0 -t only increased 1.2-fold. The Caco-2 cell monolayer model and Rhodamine-123 uptake assay indicated that both liquiritin and 6-gingerol could increase the absorption of aconitine by inhibiting the activity of P-gp. 4. These results indicated that both liquiritin and 6-gingerol could promote the absorption of aconitine and increase its drug concentration in blood by inhibiting the activity of P-gp, and it could also provide evidence for compatibility mechanism of the traditional Chinese herbal formula, Sini Decoction.) of aconitine increased approximately twofold, and while t 1/2 only increased 1.2-fold. The Caco-2 cell monolayer model and Rhodamine-123 uptake assay indicated that both liquiritin and 6-gingerol could increase the absorption of aconitine by inhibiting the activity of P-gp. 4. These results indicated that both liquiritin and 6-gingerol could promote the absorption of aconitine and increase its drug concentration in blood by inhibiting the activity of P-gp, and it could also provide evidence for compatibility mechanism of the traditional Chinese herbal formula, Sini Decoction.

Sini decoction (SND) is an important traditional Chinese multiherbal formula, which is widely used to treat cardiovascular disease. Acontium carmichaeli (AC) is a leading herb in SND, whose main components are monoester-diterpenoid alkaloids (MDAs). The aim of this study is to compare the pharmacokinetics of three MDAs in rat plasma after oral administration of AC extract and its compatibility with other herbal medicines in SND. A sensitive, accurate and specific LC-MS/MS method was developed to determine the contents of three MDAs in rat plasma. Male Sprague-Dawley rats were randomly assigned to four groups: AC, AC + ZO, AC + GU and SND groups. There were significant differences in the pharmacokinetic parameters (Cmax, Tmax, t1/2, AUC(0-24), MRT and CL). Compared with the AC group, Cmax, AUC(0-24) and CL of three MDAs increased and t1/2 decreased in AC + ZO, AC + GU and SND groups. Little changed in the AC + GU group in comparison with AC + ZO group, which indicated that other ingredients in ZO may promote the absorption rate and accelerate excretion rate of MDAs. The results could be helpful for revealing the compatibility mechanism of Chinese multiherbal medicine and providing clinical medication guidance on AC and its compatibility with other herbal medicines in SND., (Copyright © 2014 John Wiley & Sons, Ltd.)