Taxillus chinensis,belonging to hemiparasitic herbal medicine and featuring its wild host range,is used for relief from rheumatic conditions,reinforcement of liver and kidney,strengthening of tendon and bone,and prevention of abortion.It showed that host trees presented significant impacts on the quality of Taxillus chinensis in the modern researches.In this study,both domestic and foreign published articles over Taxillus chinensis from various host trees were reviewed to summarized its herbalogy,chemical constituents,toxicity,and pharmacological action.In regard to the influences on the quality of medicinal materials,ideas and references for the quality control of Taxillus chinensis were provided by analyzing the quality of Taxillus chinensis impacted by hosts.

OBJECTIVETo study the correlation of 1-deoxynojirimycin (DNJ) between Taxilli Herba parasitized in mulberry and its host-plants.

METHODThe contents of DNJ of Taxilli Herba parasitized in mulberry and non-mulberry were determined by RP-HPLC. DNJ was extracted with 0.05 mol x L(-1) HCl, and then detected by fluorescence detector after derivatized with FMOC-Cl at pH 8.0 with borate buffer. The separation was performed on an Agilent C18 (4.6 mm x 250 mm, 5 microm) column with a mobile phase of acetonitrile-0.1% aqueous acetic acid (51: 49) at a flow rate of 1.0 mL x min(-1). The wavelength of fluorescence detector was operated at lambda(EX) = 254 nm and lambda(EM) = 322 nm.

RESULTThe linear range of DNJ was 3.72-37.2 mg x L(-1) (r = 0.999 9). The average recovery was 96.42%. The contents of DNJ in mulberry and Taxilli Herba parasitized in mulberry were 1.39-10.16 mg x g(-1) and 0.46-2.72 mg x g(-1), respectively. However, the contents of DNJ could not be detected in Taxilli Herba parasitized in non mulberry and its host-plants.

CONCLUSIONAs the characteristic constituent of mulberry, DNJ was accumulated in Taxilli Herba This method can be applied to the quality control of Taxilli Herba from mulberry.

1-Deoxynojirimycin ; analysis ; Chromatography, High Pressure Liquid ; Drug Stability ; Morus ; chemistry ; Reproducibility of Results

OBJECTIVE：To establish a host specific method for the qual ity evaluation of Taxillus chiueusis by evaluating the quality of T. chiueusis from different hosts sources. METHODS ：HPLC was adopted with CAPCELL PAK C 18 MGⅡ column， mobile phase consisted of methanol- 0.2％ phosphoric acid ，volume flow 1.0 mL/min（gradient elution ），detection wavelength of 254 nm，column temperature of 30 ℃. Totally of 16 batches of T. chiueusis from different hosts sources were collected as sample （4 batches from tea host ，maple host ，willow host and mulberry host respectively ）. HPLC characteristic chromatogram was established with TCM Chromatogram Fingerprint Similarity Evaluation System （2004A edition ），and similarity evaluation was performed. The peak was identified by comparison with the reference substance. IBM SPSS 19.0 software was used for cluster analysis and principal component analysis. RESULTS ：Totally 11 common peaks were demarcated ，peak No. 8，10，11 were identified as rutin ，quercetin and quercitin. The similarity of 16 batches of samples was more than 0.9. The chemical components of T. chiueusis from different hosts sources were basically the same （RSDs of relative time of commom peaks were 0.03％-0.40％）， but the contents of the same component were quite different （RSDs of relative peak area of commom peaks were 27.00％-64.20％）. By cluster analysis ，16 batches of T. chiueusis from different hosts sources were divided into 3 types. The results of principle component analysis showed that quercetin ，quercitin and rutin had significant effect on the quality of T. chiueusis ，which could be used as the quality evaluation index ，and the whole quality of maple host was the best （the highest comprehensive score ）. CONCLUSIONS： HPLC fingerprint combined with chemometrics can be used to evaluate the quality of T. chiueusis from different hosts sources.