Abstract
Background
Gastric cancer (GC) remains a significant health problem and carries with it substantial morbidity and mortality. Chidamide is a novel and orally administered histone deacetylase (HDAC) inhibitor and has been demonstrated its anti-tumor efficacy on different kinds of hematological and solid tumors. However, the underlying mechanism of chidamide resistance is still poorly characterized.
Methods
We established chidamide resistant GC cell lines, AGS ChiR and MGC803 ChiR and investigated the toxicologic effects through cell survival, colony formation and flow cytometry assays in vitro, and a subcutaneous xenograft model in vivo. RNA-sequence was then performed to screen chidamide resistance-associated genes between AGS and AGS ChiR cells. The role of Lymphocyte cytosolic protein 1 (LCP1) in chidamide resistance was explored by gain- and loss-of-function analyses.
Results
We found that chidamide significantly inhibited cell proliferation and induced the apoptosis in a concentration-dependent manner in wild-type GC cell lines as compared to chidamide resistant cell lines. The transcriptomic profiling, quantitative RT-PCR, and western blot data revealed that LCP1 was upregulated in AGS ChiR cells compared with parental cells. Overexpression of LCP1 conferred and knockdown of LCP1 attenuated the chidamide resistance of GC cells. Epigenetic derepression of LCP1 by chidamide may be a possible reason for the contribution of LCP1 to chidamide resistance.
Conclusions
These findings illustrated that LCP1 may play a chidamide resistance role in GC, suggesting that LCP1 could be a potential target for the therapy of GC combined with chidamide.
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Abbreviations
- CFDA:
-
China Food and Drug Administration
- DMEM:
-
Dulbecco’s Modified Eagle Medium
- DMSO:
-
Dimethyl sulfoxide
- DEG:
-
Differentially expressed gene
- FBS:
-
Fetal bovine serum
- FDA:
-
Food and Drug Administration
- GC:
-
Gastric cancer
- HCC:
-
Hepatocellular carcinoma
- HDACi:
-
Histone deacetylase inhibitor
- LCP1:
-
Lymphocyte cytosolic protein 1
- NSCLC:
-
Non-Small-Cell Lung carcinoma
- PC:
-
Pancreatic cancer (PC)
- TSA:
-
Trichostatin A
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ACKNOWLEGMENTS AND DISCLOSURES
The authors have declared that they have no competing interests.
Funding
This study was supported by grants from the National Natural Science Foundation of China (No.82160468), Shanghai Science and Technology Innovation Action Plan, Medical Innovation Research Special Project (No.20Y11908400) and The Top-level Clinical Discipline Project of Shanghai Pudong (No. PWYgf2021-07).
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Conception and design: Jingde Chen and Yong Gao. Conduction of experiments: Wenfang Bao, Zhe Zhu. Statical analysis and interpretation: Wenfang Bao, Zhe Zhu. Original manuscript drafting and figure construction: Wenfang Bao and Zhe Zhu. Manuscript editing and completion: Jingde Chen. All authors contributed to the article and approved the submitted version.
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Bao, W., Zhu, Z., Gao, Y. et al. Transcriptome Profiling Analysis Identifies LCP1 as a Contributor for Chidamide Resistance in Gastric Cancer. Pharm Res 39, 867–876 (2022). https://doi.org/10.1007/s11095-022-03291-1
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DOI: https://doi.org/10.1007/s11095-022-03291-1