Document Type

Journal Article

Department/Unit

School of Chinese Medicine

Title

Standardization of the manufacturing procedure for Pinelliae Rhizoma Praeparatum cum Zingibere et Alumine

Language

English

Abstract

Ethnopharmacological relevance

Pinelliae Rhizoma (PR), the dried tuber of Pinellia ternata (Thunb.) Breit., is a traditional Chinese medicinal herb. It is commonly used for treating cancer, cough and phlegm. To treat cancer, Chinese medicine practitioners often use raw PR; while to treat cough and phlegm, they usually use Pinelliae Rhizoma Praeparatum cum Zingibere et Alumine (PRZA, raw PR processed with ginger juice and alumen as adjuvant materials). Currently, the producing protocol of PRZA varies greatly among different places in China. This study aims to standardize the manufacturing procedure for PRZA. We also evaluated the impact of processing on the bioactivities and chemical profile of raw PR.

Materials and methods

We used the orthogonal design to optimize the manufacturing procedure of PRZA at bench scale, and validated the optimized procedure in pilot-scale production. The MTT assay was used to compare the cytotoxicities of raw PR and PRZA in hepatocellular carcinoma HepG2 cells. Animal models (ammonia liquor-induced cough model and phenol red secretion model) were used to compare the antitussive and expectorant effects of raw PR and PRZA, respectively. The chemical profiles of raw PR and PRZA samples were compared using a newly developed ultra-performance liquid chromatography/quadrupole-time-of-flight mass spectrometry (UPLC/Q-TOF-MS) method.

Results

The standardized manufacturing procedure for PRZA is as follows: soak raw PR in water until the center of the cut surface is devoid of a dry core, after that, boil the herb in water (for each 100 kg raw PR, 12.5 kg alumen and 25 L freshly squeezed ginger juice are added) for 6 h, and then take out and dry them. The cytotoxicity of PRZA was less potent than that of raw PR. Intragastric administration of raw PR or PRZA demonstrated antitussive and expectorant effects in mice. These effects of PRZA were more potent than that of raw PR at the dose of 3 g/kg. By comparing the chemical profiles, we found that six peaks were lower, while nine other peaks were higher in PRZA than in raw PR. Six compounds corresponding to six individual changed peaks were tentatively identified by matching with empirical molecular formulae and mass fragments.

Conclusion

The manufacturing procedure for PRZA was standardized. This protocol can be used for PRZA industrial production. The bioactivity assay results of raw PR and PRZA (produced using the standardized protocol) support the common practice for the clinical applications of these two decoction pieces. Moreover, raw PR and PRZA showed different chemical profiles. Further studies are warranted to establish the relationship between the alteration of chemical profiles and the changes of medicinal properties caused

Keywords

Pinelliae Rhizoma, Processing procedure, Cytotoxicity, Antitussive activity, Expectorant activity, UPLC/Q-TOF-MS

Publication Date

12-2016

Source Publication Title

Journal of Ethnopharmacology

Volume

193

Start Page

663

End Page

669

Publisher

Elsevier

Peer Reviewed

1

Copyright

© 2016 Elsevier Ireland Ltd. All rights reserved.

Funder

This work was supported by the Research Grants Council of Hong Kong (12125116); the National Natural Science Foundation of China (81673649); Science, Technology and Innovation Commission of Shenzhen (JCYJ20140807091945050, JCYJ20150630164505508 and JCYJ20160229210327924); Guangdong Natural Science Foundation (2016A030313007); the Hong Kong Baptist University (FRG1/15-16/050 and FRG2/15-16/020); and Chinese Pharmacopoeia Commission (201207004-10).

DOI

10.1016/j.jep.2016.09.038

Link to Publisher's Edition

http://dx.doi.org/10.1016/j.jep.2016.09.038

ISSN (print)

03788741

ISSN (electronic)

18727573

This document is currently not available here.

Share

COinS