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Wu WJ, Li LF, Fung HY, Cheng HY, Kong HY, Wong TL, Zhang QW, Liu M, Bao WR, Huo CY, Guo S, Liu H, Zhou X, Gao DF, Han QB. Qualitative and Quantitative Analysis of Ejiao-Related Animal Gelatins through Peptide Markers Using LC-QTOF-MS/MS and Scheduled Multiple Reaction Monitoring (MRM) by LC-QQQ-MS/MS. Molecules 2022; 27:molecules27144643. [PMID: 35889516 PMCID: PMC9318382 DOI: 10.3390/molecules27144643] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 05/16/2022] [Accepted: 05/18/2022] [Indexed: 02/04/2023] Open
Abstract
Donkey-hide gelatin, also called Ejiao (colla corii asini), is commonly used as a food health supplement and valuable Chinese medicine. Its growing popular demand and short supply make it a target for fraud, and many other animal gelatins can be found as adulterants. Authentication remains a quality concern. Peptide markers were developed by searching the protein database. However, donkeys and horses share the same database, and there is no specific marker for donkeys. Here, solutions are sought following a database-independent strategy. The peptide profiles of authentic samples of different animal gelatins were compared using LC-QTOF-MS/MS. Fourteen specific markers, including four donkey-specific, one horse-specific, three cattle-specific, and six pig-specific peptides, were successfully found. As these donkey-specific peptides are not included in the current proteomics database, their sequences were determined by de novo sequencing. A quantitative LC-QQQ multiple reaction monitoring (MRM) method was further developed to achieve highly sensitive and selective analysis. The specificity and applicability of these markers were confirmed by testing multiple authentic samples and 110 batches of commercial Ejiao products, 57 of which were found to be unqualified. These results suggest that these markers are specific and accurate for authentication purposes.
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Affiliation(s)
- Wen-Jie Wu
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Hong Kong 999077, China; (W.-J.W.); (L.-F.L.); (H.-Y.F.); (H.-Y.C.); (H.-Y.K.); (T.-L.W.); (Q.-W.Z.); (M.L.); (W.-R.B.); (C.-Y.H.)
| | - Li-Feng Li
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Hong Kong 999077, China; (W.-J.W.); (L.-F.L.); (H.-Y.F.); (H.-Y.C.); (H.-Y.K.); (T.-L.W.); (Q.-W.Z.); (M.L.); (W.-R.B.); (C.-Y.H.)
- Hong Kong Authentication Centre of Valuable Chinese Medicines, Hong Kong 999077, China;
| | - Hau-Yee Fung
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Hong Kong 999077, China; (W.-J.W.); (L.-F.L.); (H.-Y.F.); (H.-Y.C.); (H.-Y.K.); (T.-L.W.); (Q.-W.Z.); (M.L.); (W.-R.B.); (C.-Y.H.)
| | - Hui-Yuan Cheng
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Hong Kong 999077, China; (W.-J.W.); (L.-F.L.); (H.-Y.F.); (H.-Y.C.); (H.-Y.K.); (T.-L.W.); (Q.-W.Z.); (M.L.); (W.-R.B.); (C.-Y.H.)
| | - Hau-Yee Kong
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Hong Kong 999077, China; (W.-J.W.); (L.-F.L.); (H.-Y.F.); (H.-Y.C.); (H.-Y.K.); (T.-L.W.); (Q.-W.Z.); (M.L.); (W.-R.B.); (C.-Y.H.)
| | - Tin-Long Wong
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Hong Kong 999077, China; (W.-J.W.); (L.-F.L.); (H.-Y.F.); (H.-Y.C.); (H.-Y.K.); (T.-L.W.); (Q.-W.Z.); (M.L.); (W.-R.B.); (C.-Y.H.)
| | - Quan-Wei Zhang
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Hong Kong 999077, China; (W.-J.W.); (L.-F.L.); (H.-Y.F.); (H.-Y.C.); (H.-Y.K.); (T.-L.W.); (Q.-W.Z.); (M.L.); (W.-R.B.); (C.-Y.H.)
| | - Man Liu
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Hong Kong 999077, China; (W.-J.W.); (L.-F.L.); (H.-Y.F.); (H.-Y.C.); (H.-Y.K.); (T.-L.W.); (Q.-W.Z.); (M.L.); (W.-R.B.); (C.-Y.H.)
| | - Wan-Rong Bao
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Hong Kong 999077, China; (W.-J.W.); (L.-F.L.); (H.-Y.F.); (H.-Y.C.); (H.-Y.K.); (T.-L.W.); (Q.-W.Z.); (M.L.); (W.-R.B.); (C.-Y.H.)
| | - Chu-Ying Huo
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Hong Kong 999077, China; (W.-J.W.); (L.-F.L.); (H.-Y.F.); (H.-Y.C.); (H.-Y.K.); (T.-L.W.); (Q.-W.Z.); (M.L.); (W.-R.B.); (C.-Y.H.)
| | - Shangwei Guo
- Shandong Technology Innovation Center of Gelatin-Based Traditional Chinese Medicine, Dong-E-E-Jiao Co., Ltd., No. 78, E-Jiao Street, Done-E Country, Liaocheng 252200, China; (S.G.); (H.L.)
| | - Haibin Liu
- Shandong Technology Innovation Center of Gelatin-Based Traditional Chinese Medicine, Dong-E-E-Jiao Co., Ltd., No. 78, E-Jiao Street, Done-E Country, Liaocheng 252200, China; (S.G.); (H.L.)
| | - Xiangshan Zhou
- Shandong Technology Innovation Center of Gelatin-Based Traditional Chinese Medicine, Dong-E-E-Jiao Co., Ltd., No. 78, E-Jiao Street, Done-E Country, Liaocheng 252200, China; (S.G.); (H.L.)
- China Resources Biopharmaceutical Co., Ltd., Beijing 100000, China
- Correspondence: (X.Z.); (Q.-B.H.); Tel.: +86-10-5798-5166 (X.Z.); +852-34112906 (Q.-B.H.); Fax: +852-34112461 (Q.-B.H.)
| | - Deng-Feng Gao
- Hong Kong Authentication Centre of Valuable Chinese Medicines, Hong Kong 999077, China;
| | - Quan-Bin Han
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Hong Kong 999077, China; (W.-J.W.); (L.-F.L.); (H.-Y.F.); (H.-Y.C.); (H.-Y.K.); (T.-L.W.); (Q.-W.Z.); (M.L.); (W.-R.B.); (C.-Y.H.)
- Hong Kong Authentication Centre of Valuable Chinese Medicines, Hong Kong 999077, China;
- Correspondence: (X.Z.); (Q.-B.H.); Tel.: +86-10-5798-5166 (X.Z.); +852-34112906 (Q.-B.H.); Fax: +852-34112461 (Q.-B.H.)
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