Cyclophilin A knockdown inhibits the proliferation and metastatic ability of AGS gastric cancer stem cells by downregulating CD147/STAT3/AKT/ERK and epithelial‑mesenchymal transition

Cho,Hee Jeong; Jung,Hye Jin

doi:10.3892/mmr.2024.13379

Cyclophilin A knockdown inhibits the proliferation and metastatic ability of AGS gastric cancer stem cells by downregulating CD147/STAT3/AKT/ERK and epithelial‑mesenchymal transition

Authors:
- Hee Jeong Cho
- Hye Jin Jung
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Affiliations: Department of Life Science and Biochemical Engineering, Graduate School, Sun Moon University, Asan, Chungcheongnam 31460, Republic of Korea
Published online on: October 30, 2024 https://doi.org/10.3892/mmr.2024.13379
Article Number: 14
Copyright: © Cho et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Gastric cancer stem cells (GCSCs) contribute to the challenging aspects of gastric cancer, such as progression, metastasis, treatment resistance and recurrence. Inhibitors targeting cyclophilin A (CypA) have shown potential in curtailing GCSC growth. Building upon this, the current study delved deeper into understanding the functional role of CypA in controlling the proliferation and metastatic capabilities of GCSCs, employing CypA‑specific small interfering RNA. The results revealed that knockdown of CypA led to significant suppression of the growth and tumorsphere‑forming capacity of GCSCs derived from AGS cells. This effect was mediated by arresting the cell cycle at the G₀/G₁ and S phases, and promoting apoptosis. Furthermore, silencing of CypA exerted inhibitory effects on the migration and invasion of AGS GCSCs by modulating the process of epithelial‑mesenchymal transition. Notably, the observed antiproliferative and antimetastatic effects of CypA knockdown were associated with the downregulation of critical regulators of gastric cancer stemness, such as CD44, CD133, aldehyde dehydrogenase 1 family member A1, NANOG, OCT4 and SOX2. This regulation occurred through inactivation of the CD147/STAT3/AKT/ERK signaling pathway. Additionally, CypA knockdown effectively curbed in vivo tumor growth of AGS GCSCs in a chorioallantoic membrane assay using chick embryos. These findings underscore the critical role of CypA in promoting the proliferation and metastasis of GCSCs, highlighting its potential as an effective therapeutic target for eradicating GCSCs and improving gastric cancer treatment outcomes.

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