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2‑Hydroxypropyl‑β‑cyclodextrin blocks autophagy flux and triggers caspase‑8‑mediated apoptotic cascades in HepG2 cells

  • Authors:
    • Haidong Sun
    • Huajie Zong
    • Gang Wu
  • View Affiliations / Copyright

    Affiliations: Department of General Surgery, Huashan Hospital, Fudan University, Shanghai 200040, P.R. China
    Copyright: © Sun et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 1901-1909
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    Published online on: June 26, 2020
       https://doi.org/10.3892/mmr.2020.11282
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Abstract

The cyclodextrin derivative, 2‑Hydroxypropyl-β‑cyclodextrin (HPβCD), from the cyclodextrin family is widely used as a drug carrier and offers promising strategies for treating neurodegenerative diseases and atherosclerosis regression. However, its side effects are not fully understood. Therefore, the aim of the present study was to investigate the possible adverse effects of relatively high concentrations of HPβCD on hepatocytes. It was found that a high dose (20 mM) of HPβCD treatment significantly inhibited the AKT/mTOR pathway and disrupted infusion of autophagosomes and lysosomes, which rapidly led to massive autophagosome accumulation in HepG2 cells. The autophagosomal membrane serves as a platform for caspase‑8 oligomerization, which is considered as the key step for its self‑activation. Using flow cytometry and TUNEL assay, increased apoptosis of HepG2 cells treated with a high dose HPβCD (20 mM) for 48 h was observed. In addition, western blotting results demonstrated that the expression of cleaved‑caspase‑8 was positively associated with microtubule‑associated protein 1 light chain 3 BII expression, which is an indicator of autophagosome level in the cytoplasm. Therefore, the present study provided novel evidence that HPβCD might be a potential risk contributing to the pathophysiological process of hepatic diseases, especially in an autophagy‑deficient state.
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Copy and paste a formatted citation
Spandidos Publications style
Sun H, Zong H and Wu G: 2‑Hydroxypropyl‑β‑cyclodextrin blocks autophagy flux and triggers caspase‑8‑mediated apoptotic cascades in HepG2 cells. Mol Med Rep 22: 1901-1909, 2020.
APA
Sun, H., Zong, H., & Wu, G. (2020). 2‑Hydroxypropyl‑β‑cyclodextrin blocks autophagy flux and triggers caspase‑8‑mediated apoptotic cascades in HepG2 cells. Molecular Medicine Reports, 22, 1901-1909. https://doi.org/10.3892/mmr.2020.11282
MLA
Sun, H., Zong, H., Wu, G."2‑Hydroxypropyl‑β‑cyclodextrin blocks autophagy flux and triggers caspase‑8‑mediated apoptotic cascades in HepG2 cells". Molecular Medicine Reports 22.3 (2020): 1901-1909.
Chicago
Sun, H., Zong, H., Wu, G."2‑Hydroxypropyl‑β‑cyclodextrin blocks autophagy flux and triggers caspase‑8‑mediated apoptotic cascades in HepG2 cells". Molecular Medicine Reports 22, no. 3 (2020): 1901-1909. https://doi.org/10.3892/mmr.2020.11282
Copy and paste a formatted citation
x
Spandidos Publications style
Sun H, Zong H and Wu G: 2‑Hydroxypropyl‑β‑cyclodextrin blocks autophagy flux and triggers caspase‑8‑mediated apoptotic cascades in HepG2 cells. Mol Med Rep 22: 1901-1909, 2020.
APA
Sun, H., Zong, H., & Wu, G. (2020). 2‑Hydroxypropyl‑β‑cyclodextrin blocks autophagy flux and triggers caspase‑8‑mediated apoptotic cascades in HepG2 cells. Molecular Medicine Reports, 22, 1901-1909. https://doi.org/10.3892/mmr.2020.11282
MLA
Sun, H., Zong, H., Wu, G."2‑Hydroxypropyl‑β‑cyclodextrin blocks autophagy flux and triggers caspase‑8‑mediated apoptotic cascades in HepG2 cells". Molecular Medicine Reports 22.3 (2020): 1901-1909.
Chicago
Sun, H., Zong, H., Wu, G."2‑Hydroxypropyl‑β‑cyclodextrin blocks autophagy flux and triggers caspase‑8‑mediated apoptotic cascades in HepG2 cells". Molecular Medicine Reports 22, no. 3 (2020): 1901-1909. https://doi.org/10.3892/mmr.2020.11282
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