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Phytomedicine

Phytomedicine

IF: 6.7
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Tannins in Phyllanthus emblica L. improves cisplatin efficacy in lung cancer cells by boosting endoplasmic reticulum stress to trigger immunogenic cell death

Published:15 November 2023 DOI:
Qian Hu , Shukai Wang , Ruiyang Cheng , Yuqi Liu , Zihao Chang , Ya Huang , Yinxin Chen , Xiaowei Luo , Lipeng Zhou , Baojin Wang , Ye Gao , Hongjiao Chen , Runping Liu , Lanzhen Zhang

Abstract

Background

Lung cancer is one of the deadliest cancers world-wide and immunotherapy has been considered as a promising therapeutic strategy. Previously, our study found that tannins in Phyllanthus emblica L. (PTF) could inhibit the growth of tumor by activating the immune response in liver cancer, and also exhibited a cytotoxicity on human lung cancer cells A549, H460, H1703 in vitro.

Objective

To explore whether PTF inhibited the growth of lung cancer through its immune-regulating function and to clarify underlying mechanisms.

Methods

The induction of immunogenic cell death (ICD) were characterized by calreticulin exposure, extracellular ATP secretion, and High Mobility Group Box 1(HMGB1) release both in vivo using LLC-derived xenograft tumor model and in vitro using both mouse LLC and human A549 cancer cells.

Results

PTF inhibited lung cancer cells growth and tumorigenesis in vivo/vitro and promoted anti-tumor immune responses. We further found that PTF could induce ICD, which then activated Type I interferon responses and CXCL9/10-mediated chemotaxis. Mechanistically, PTF induced the formation of intracellular protein aggregates and following activation of PERK/ATF4/CHOP-dependent endoplasmic reticulum stress-related ICD. Moreover, PTF improved the antitumor efficacy of cisplatin by inducing ICD both in vitro and in vivo. Finally, we screened out 5 components from PTF, including gallocatechin, gallic acid, methyl gallate, ethyl gallate and ellagic acid, which could induce ICD in vitro and might be considered as the potential antitumor pharmacodynamic substances.

Conclusion

In conclusion, PTF inhibits the growth of lung cancer by triggering ICD and remodeling the tumor microenvironment, suggesting that PTF may have promising prospects as an adjacent immunotherapy for cancers.

Substances (40)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Gallic acid 149-91-7 C7H6O5 955 suppliers $5.00-$1754.50
Gallic acid 149-91-7 C7H6O5 955 suppliers $5.00-$1754.50
Gallic acid 149-91-7 C7H6O5 955 suppliers $5.00-$1754.50
Gallic acid 149-91-7 C7H6O5 955 suppliers $5.00-$1754.50
Sebacic acid 111-20-6 C10H18O4 813 suppliers $5.00-$2920.50
Sebacic acid 111-20-6 C10H18O4 813 suppliers $5.00-$2920.50
Sebacic acid 111-20-6 C10H18O4 813 suppliers $5.00-$2920.50
Sebacic acid 111-20-6 C10H18O4 813 suppliers $5.00-$2920.50
Ellagic acid 476-66-4 C14H6O8 758 suppliers $5.00-$4469.44
Ellagic acid 476-66-4 C14H6O8 758 suppliers $5.00-$4469.44

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