Non‐small cell lung cancer (NSCLC) with wild‐type epidermal growth factor receptor (EGFR) is intrinsic resistance to EGFR‐tyrosine kinase inhibitors (TKIs), such as afatinib. Celastrol, a natural compound with antitumor activity, was reported to...
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https://www.riss.kr/link?id=O111279657
2021년
-
0021-9541
1097-4652
SCI;SCIE;SCOPUS
학술저널
4538-4554 [※수록면이 p5 이하이면, Review, Columns, Editor's Note, Abstract 등일 경우가 있습니다.]
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
Non‐small cell lung cancer (NSCLC) with wild‐type epidermal growth factor receptor (EGFR) is intrinsic resistance to EGFR‐tyrosine kinase inhibitors (TKIs), such as afatinib. Celastrol, a natural compound with antitumor activity, was reported to...
Non‐small cell lung cancer (NSCLC) with wild‐type epidermal growth factor receptor (EGFR) is intrinsic resistance to EGFR‐tyrosine kinase inhibitors (TKIs), such as afatinib. Celastrol, a natural compound with antitumor activity, was reported to induce paraptosis in cancer cells. In this study, intrinsic EGFR‐TKI‐resistant NSCLC cell lines H23 (EGFR wild‐type and KRAS mutation) and H292 (EGFR wild‐type and overexpression) were used to test whether celastrol could overcome primary afatinib resistance through paraptosis induction. The synergistic effect of celastrol and afatinib on survival inhibition of the NSCLC cells was evaluated by CCK‐8 assay and isobologram analysis. The paraptosis and its modulation were assessed by light and electron microscopy, Western blot analysis, and immunofluorescence. Xenografts models were established to investigate the inhibitory effect of celastrol plus afatinib on the growth of the NSCLC tumors in vivo. Results showed that celastrol acted synergistically with afatinib to suppress the survival of H23 and H292 cells by inducing paraptosis characterized by extensive cytoplasmic vacuolation. This process was independent of apoptosis and not associated with autophagy induction. Afatinib plus celastrol‐induced cytoplasmic vacuolation was preceded by endoplasmic reticulum stress and unfolded protein response. Accumulation of intracellular reactive oxygen species and mitochondrial Ca2+ overload may be initiating factors of celastrol/afatinib‐induced paraptosis and subsequent cell death. Furthermore, Celastrol and afatinib synergistically suppressed the growth of H23 cell xenograft tumors in vivo. The data indicate that a combination of afatinib and celastrol may be a promising therapeutic strategy to surmount intrinsic afatinib resistance in NSCLC cells.
Celastrol acted synergistically with afatinib to suppress the survival of non‐small cell lung cancer cells by inducing paraptosis.
Afatinib plus celastrol‐induced paraptosis was mediated by endoplasmic reticulum stress and unfolded protein response.
Accumulation of intracellular reactive oxygen species and mitochondrial Ca2+ overload induced by celastrol/afatinib may be an initiating factor of paraptosis and subsequent cell death.
Celastrol acted synergistically with afatinib to suppress the survival of non‐small cell lung cancer cells by inducing paraptosis.
Afatinib plus celastrol‐induced paraptosis was mediated by endoplasmic reticulum stress and unfolded protein response.
Accumulation of intracellular reactive oxygen species and mitochondrial Ca2+ overload induced by celastrol/afatinib may be an initiating factor of paraptosis and subsequent cell death.