Ophiopogonin B-induced autophagy in non-small cell lung cancer cells via inhibition of the PI3K/Akt signaling pathway

Ophiopogonin B (OP-B) is a bioactive component of Radix Ophiopogon Japonicus, which is often used in Chinese traditional medicine to treat pulmonary disease. However, whether or not OP-B has any potential antitumor activity has not been reported. Here, we show that the non-small cell lung cancer (NS...

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Veröffentlicht in:Oncology reports 2013-02, Vol.29 (2), p.430-436
Hauptverfasser: CHEN, MEIJUAN, DU, YUHONG, QUI, MIN, WANG, MINGYAN, CHEN, KEJUN, HUANG, ZHENZHOU, JIANG, MIAO, XIONG, FEI, CHEN, JIANPING, ZHOU, JING, JIANG, FENGRONG, YIN, LIAN, TANG, YUPING, YE, LIHONG, ZHAN, ZHEN, DUAN, JIN-AO, FU, HAI-AN, ZHANG, XU
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container_end_page 436
container_issue 2
container_start_page 430
container_title Oncology reports
container_volume 29
creator CHEN, MEIJUAN
DU, YUHONG
QUI, MIN
WANG, MINGYAN
CHEN, KEJUN
HUANG, ZHENZHOU
JIANG, MIAO
XIONG, FEI
CHEN, JIANPING
ZHOU, JING
JIANG, FENGRONG
YIN, LIAN
TANG, YUPING
YE, LIHONG
ZHAN, ZHEN
DUAN, JIN-AO
FU, HAI-AN
ZHANG, XU
description Ophiopogonin B (OP-B) is a bioactive component of Radix Ophiopogon Japonicus, which is often used in Chinese traditional medicine to treat pulmonary disease. However, whether or not OP-B has any potential antitumor activity has not been reported. Here, we show that the non-small cell lung cancer (NSCLC) cell lines NCI-H157 and NCI-H460 treated with OP-B grow more slowly and accumulate vacuoles in their cytoplasm compared to untreated control cells. Flow cytometric analysis showed that the cells were arrested in G0/G1 phase. Nuclear morphology, Annexin-V/PI staining, and expression of cleaved caspase-3 all confirm that OP-B does not induce apoptosis. Instead, based on results from both transmission electron microscopy (TEM) and the expression of microtubule-associated protein 1 light chain 3-II (LC3-II), we determined that OP-B treatment induced autophagy in both cell lines. Next, we examined the PI3K/Akt/mTOR signaling pathway and found that OP-B inhibited phosphorylation of Akt (Ser473, Thr308) in NCI-H157 cells and also inhibited several key components of the pathway in NCI-H460 cells, such as p-Akt(Ser473, Thr308), p-p70S6K (Thr389). Additionally, insulin-mediated activation of the PI3K/Akt/mTOR pathway provides evidence that activation of this pathway may correlate with induction of autophagy in H460 cells. Therefore, OP-B is a prospective inhibitor of PI3K/Akt and may be used as an alternative compound to treat NSCLC.
doi_str_mv 10.3892/or.2012.2131
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However, whether or not OP-B has any potential antitumor activity has not been reported. Here, we show that the non-small cell lung cancer (NSCLC) cell lines NCI-H157 and NCI-H460 treated with OP-B grow more slowly and accumulate vacuoles in their cytoplasm compared to untreated control cells. Flow cytometric analysis showed that the cells were arrested in G0/G1 phase. Nuclear morphology, Annexin-V/PI staining, and expression of cleaved caspase-3 all confirm that OP-B does not induce apoptosis. Instead, based on results from both transmission electron microscopy (TEM) and the expression of microtubule-associated protein 1 light chain 3-II (LC3-II), we determined that OP-B treatment induced autophagy in both cell lines. Next, we examined the PI3K/Akt/mTOR signaling pathway and found that OP-B inhibited phosphorylation of Akt (Ser473, Thr308) in NCI-H157 cells and also inhibited several key components of the pathway in NCI-H460 cells, such as p-Akt(Ser473, Thr308), p-p70S6K (Thr389). 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Spandidos</publisher><subject>Apoptosis ; Autophagy ; Autophagy - drug effects ; Carcinoma, Non-Small-Cell Lung - drug therapy ; Carcinoma, Non-Small-Cell Lung - enzymology ; Cell cycle ; Cell Cycle Checkpoints - drug effects ; Cell Line, Tumor ; Cell Proliferation - drug effects ; Cytoplasm ; Humans ; Kinases ; Lung cancer ; Lung Neoplasms - drug therapy ; Lung Neoplasms - enzymology ; Microtubule-Associated Proteins - metabolism ; Morphology ; natural medicines ; non-small cell lung cancer ; Ophiopogonin B ; Phosphatidylinositol 3-Kinases - metabolism ; PI3K/Akt/mTOR ; Plant Extracts - pharmacology ; Proto-Oncogene Proteins c-akt - metabolism ; Saponins - pharmacology ; Signal Transduction - drug effects ; Spirostans - pharmacology ; Vacuoles - drug effects</subject><ispartof>Oncology reports, 2013-02, Vol.29 (2), p.430-436</ispartof><rights>Copyright © 2013, Spandidos Publications</rights><rights>Copyright Spandidos Publications UK Ltd. 2013</rights><rights>Copyright © 2013, Spandidos Publications 2013</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c443t-2a813ba457e98cac6809e6b9a30b54855fe76b582d657e38fe1aecc8add141ed3</citedby><cites>FETCH-LOGICAL-c443t-2a813ba457e98cac6809e6b9a30b54855fe76b582d657e38fe1aecc8add141ed3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,776,780,881,27903,27904</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/23151908$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>CHEN, MEIJUAN</creatorcontrib><creatorcontrib>DU, YUHONG</creatorcontrib><creatorcontrib>QUI, MIN</creatorcontrib><creatorcontrib>WANG, MINGYAN</creatorcontrib><creatorcontrib>CHEN, KEJUN</creatorcontrib><creatorcontrib>HUANG, ZHENZHOU</creatorcontrib><creatorcontrib>JIANG, MIAO</creatorcontrib><creatorcontrib>XIONG, FEI</creatorcontrib><creatorcontrib>CHEN, JIANPING</creatorcontrib><creatorcontrib>ZHOU, JING</creatorcontrib><creatorcontrib>JIANG, FENGRONG</creatorcontrib><creatorcontrib>YIN, LIAN</creatorcontrib><creatorcontrib>TANG, YUPING</creatorcontrib><creatorcontrib>YE, LIHONG</creatorcontrib><creatorcontrib>ZHAN, ZHEN</creatorcontrib><creatorcontrib>DUAN, JIN-AO</creatorcontrib><creatorcontrib>FU, HAI-AN</creatorcontrib><creatorcontrib>ZHANG, XU</creatorcontrib><title>Ophiopogonin B-induced autophagy in non-small cell lung cancer cells via inhibition of the PI3K/Akt signaling pathway</title><title>Oncology reports</title><addtitle>Oncol Rep</addtitle><description>Ophiopogonin B (OP-B) is a bioactive component of Radix Ophiopogon Japonicus, which is often used in Chinese traditional medicine to treat pulmonary disease. 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subjects Apoptosis
Autophagy
Autophagy - drug effects
Carcinoma, Non-Small-Cell Lung - drug therapy
Carcinoma, Non-Small-Cell Lung - enzymology
Cell cycle
Cell Cycle Checkpoints - drug effects
Cell Line, Tumor
Cell Proliferation - drug effects
Cytoplasm
Humans
Kinases
Lung cancer
Lung Neoplasms - drug therapy
Lung Neoplasms - enzymology
Microtubule-Associated Proteins - metabolism
Morphology
natural medicines
non-small cell lung cancer
Ophiopogonin B
Phosphatidylinositol 3-Kinases - metabolism
PI3K/Akt/mTOR
Plant Extracts - pharmacology
Proto-Oncogene Proteins c-akt - metabolism
Saponins - pharmacology
Signal Transduction - drug effects
Spirostans - pharmacology
Vacuoles - drug effects
title Ophiopogonin B-induced autophagy in non-small cell lung cancer cells via inhibition of the PI3K/Akt signaling pathway
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