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A novel strategy for the discrimination of gelatinous Chinese medicines based on enzymatic digestion followed by nano-flow liquid chromatography in tandem with orbitrap mass spectrum detection

Authors Yang H, Shen Y, Xu Y, Maqueda AS, Zheng J, Wu Q, Tam J

Received 5 February 2015

Accepted for publication 16 April 2015

Published 5 August 2015 Volume 2015:10(1) Pages 4947—4955

DOI https://doi.org/10.2147/IJN.S82291

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 4

Editor who approved publication: Prof. Dr. Thomas J Webster

Huan Yang,1,2 Yuping Shen,1 Ying Xu,1 Aida Serra Maqueda,2 Jie Zheng,1 Qinan Wu,3 James P Tam2

1Department of Chinese Materia Medica and Pharmacy, School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu, People’s Republic of China; 2Division of Structural Biology and Biochemistry, School of Biological Sciences, College of Science, Nanyang Technological University, Singapore; 3Department of Chinese Medicine Authentication, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, People’s Republic of China

Abstract: Gelatinous Chinese medicines made from mammalian skin or horn or reptile shell are a very important type of animal-derived Chinese medicine. They have been extensively used either as both hemopoietic and hemostatic agents to treat vertigo, palpitation, hematuria, and insomnia in traditional Chinese medicine clinics; consumed as a popular tonic for weaker persons such as the elderly or women after giving birth; or further manufactured to health supplements for certain populations. However, they cannot be discriminated from each other by only using the routine approach in the Chinese Pharmacopoeia, as it lacks enough specificity and, consequently, and the requirements can be met even by adding assayed ingredients. In this study, our efforts to differentiate three gelatinous Chinese medicines, Asini Corii Colla, Cervi Cornus Colla, and Testudinis Carapacis ET Plastri Colla, are presented, and a novel strategy based on enzymatic digestion followed by nano-flow liquid chromatography in tandem with orbitrap mass spectrum detector analysis is proposed herein. Fourteen diagnostic fragments identified from the digests of these medicines were exclusively selected for their discrimination. By taking advantage of the favorable features of this strategy, it is feasible and convenient to identify enzymatic-digested peptides originated from signature proteins in each medicine, which thus could be employed as potential biomarkers for their form of raw medicinal material, and the pulverized and the complex especially, that being the direct basis for authentication purpose.

Keywords: traditional Chinese medicine, animal-derived Chinese medicines, potential biomarkers, authentication, diagnostic fragments

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