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    Article

    Determination of the Genomic DNA Degradation Rate of the Chinese Herb Gentianae crassicaulis Radix During Processing and Storage

    Weitao Li1, Shaohua Yang2, Lianghong Ni1★, Zhili Zhao1★, Hongxi Xu1★★ Corresponding author

    1. 1School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China.
    2. 2Institute of Alpine Economic Botany, Yunnan Academy of Agricultural Sciences, Lijiang, China.

    CORRESPONDENCE

    Lianghong Ni

    School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. ; Zhili Zhao,School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. Email: zhilzhao@sohu.com; Hongxi Xu,School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. Email: xuhongxi88@gmail.com

    nlhtcm@126.com

    Received: 05-10-2022; Accepted: 05-12-2022.

    Volume 19, Issue 3 · pp. 520–529 · PUBLISHED 2023 · DOI: 10.1177/09731296231170254

    View on Pharmacogn. Mag. original site ↗

    ABSTRACT

    Background: Accurate identification of Chinese herbal medicines is the basis for their research and utilization. Molecular identification can effectively differentiate original plants from counterfeit plants. The quality of genomic DNA is an important factor affecting molecular identification. However, the processing can lead to DNA degradation of the herbal medicines, which can make it difficult for their molecular identification. Objectives: To establish a genomic DNA degradation model of Gentiana crassicaulis Radix to evaluate the effects of processing methods and storage times on genomic DNA integrity. Materials and Methods: A genomic DNA degradation model of G. crassicaulis—the original plant source of the Chinese herbal medicine G. crassicaulis Radix—was established using a steam heating method. Genomic DNA integrity of G. crassicaulis Radix was evaluated using capillary electrochromatography (CEC) fingerprinting and polymerase chain reaction (PCR) of DNA barcoding markers following different processing and drying methods, including slicing (sliced roots), no slicing (whole roots), stoving, air drying, and sweating. Results: CEC fingerprinting and DNA barcoding PCR effectively evaluated genomic DNA integrity. Compared to whole roots, sliced roots better helped maintain genomic DNA integrity. As the storage time increased, the integrity of the genomic DNA reduced; the integrity of the genomic DNA of sliced roots was greater than that of whole roots. Furthermore, the interactions between slicing and drying methods possibly reduced the genomic DNA integrity. Conclusion: A genomic DNA degradation model and an evaluation system for herbal medicines were established. Our findings can help optimize the method for processing G. crassicaulis Radix and establish the traceability of genuine herbal medicines.

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      Li, W., Yang, S., Ni, L., Zhao, Z., & Xu, H. (2023). Determination of the Genomic DNA Degradation Rate of the Chinese Herb Gentianae crassicaulis Radix During Processing and Storage. Pharmacognosy Magazine, 19(3), 520–529. https://doi.org/10.1177/09731296231170254