Journal of Traditional Chinese Medicine ›› 2023, Vol. 43 ›› Issue (4): 661-666.DOI: 10.19852/j.cnki.jtcm.2023.04.003

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Synergistic effect of schizandrin A and DNase I knockdown on high glucose induced beta cell apoptosis by decreasing intracellular calcium concentration

ZHU Bin1(), YU Ning2, WANG Lei3, TIAN Yue1, WU Mingfen1, ZHAO Zhigang1()   

  1. 1 Department of Pharmacy, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, China
    2 Accreditation Center of Traditional Chinese Medicine Physician of National Administration of Traditional Chinese Medicine, Beijing 100120, China
    3 Department of Endocrinology, the Third Affiliated Hospital of Beijing University of Chinese Medicine, Beijing 100050, China
  • Received:2022-03-16 Accepted:2022-07-08 Online:2023-08-15 Published:2023-07-03
  • Contact: ZHAO Zhigang, Department of Pharmacy, Beijing Tiantan Hospital Affiliated to Capital Medical University, Beijing 100070, China. 1022zzg@sina.com. Telephone: +86-10-59975442; +86-010-59976856
    ZHU Bin, Department of Pharmacy, Beijing Tiantan Hospital Affiliated to Capital Medical University, Beijing 100070, China. zbtcm@163.com
  • Supported by:
    Natural Science Foundation of China: the Protective Effect of Schizandrin A to β Cell Apoptosis by DNase I in Type 2 Diabetes(81803909)

Abstract:

OBJECTIVE: To explore the synergistic effect of deoxyribonuclease I (DNase I) knockdown combined with Schizandrin A (Sch A) in protecting islet beta-cells (β-cells) from apoptosis under high-glucose (HG) conditions.

METHODS: The concentration of Sch A was detected by Cell Counting Kit-8 (CCK-8). High glucose-cultured rat insulinoma beta cell line (RIN-M5F) cells were treated with Sch A and transfected with DNase I small interfering RNA (siRNA). Cell apoptosis rate and apoptosis-related protein level were examined by flow cytometry and Western blot method respectively. In addition, Na+-K+-adenosine triphosphatease (Na+-K+-ATPase) and Ca2+-Mg2+-ATPase activity, cell membrane potential, and intracellular Ca2+ concentration was also examined respectively.

RESULTS: Our study revealed that HG stimulation can cause a significant increase in DNase I level and cell apoptosis rate. However, Sch A combined with DNase I knockdown can significantly decrease the cell apoptosis rate and apoptosis-related protein levels such as BAX (P < 0.05) and Caspase-3 (P < 0.01). In addition, we also found that the combination of Sch A and DNase I knockdown can dramatically increase cell membrane potential level, Na+-K+-ATPase, and Ca2+-Mg2+-ATPase activity. Meanwhile, intracellular Ca2+ concentration was also found to be significantly decreased by the synergistic effect of Sch A and DNase I knockdown.

CONCLUSION: Overall, our study reveals a synergistic effect of Sch A and DNase I knockdown in protecting β-cells from HG-induced apoptosis.

Key words: high glucose, diabetes, β-cell apoptosis, synergistic effect, Schizandrin A

Cite this article

ZHU Bin, YU Ning, WANG Lei, TIAN Yue, WU Mingfen, ZHAO Zhigang. Synergistic effect of schizandrin A and DNase I knockdown on high glucose induced beta cell apoptosis by decreasing intracellular calcium concentration[J]. Journal of Traditional Chinese Medicine, 2023, 43(4): 661-666.