28 April 2017 : Laboratory Research
Lycorine Induces Apoptosis of A549 Cells via AMPK-Mammalian Target of Rapamycin (mTOR)-S6K Signaling PathwayHui Zeng1ACE, Rong Fu2FG, Linxia Yan3CE, Jian Huang4BDE*
Med Sci Monit 2017; 23:2035-2041
BACKGROUND: This study was designed to investigate the effect of lycorine (LY) on the AMPK-mTOR-S6K signaling pathway and to clarify its role in autophagy and apoptosis.
MATERIAL AND METHODS: Various concentrations of LY were used to treat non-small cell lung carcinoma A549 cells. The MTT assay was used to measure cell viability and acridine orange staining was used to detect cell morphology changes. Western blot analysis was used to test the effect of LY on the expression levels of LC3, caspase 3, and other proteins involved in the AMPK-mTOR-S6K signaling pathway.
RESULTS: The half maximal inhibitory concentration (IC50) of LY after 24-h treatment was 8.5 μM, with stronger inhibitory effect of 24-h LY treatment over 12-h LY treatment. Morphological observation showed that lower doses (4 μM and 8 μM) of LY treatment induced A549 cell death mainly caused by autophagy, whereas the higher dose (16 μM) of LY treatment induced A549 cell death, mainly caused by apoptosis. Furthermore, 8 μM LY caused the highest conversion of LC3-II from LC3-I. All LY treatments activated caspase-3. LY treatment also promoted AMPK phosphorylation (Thr172) and inhibited the phosphorylation of mTOR and S6K.
CONCLUSIONS: LY induced apoptosis of A549 cells by regulating the AMPK-mTOR-S6K signaling pathway. Lower levels (4~8 μM) of LY-induced autophagy contributed to LY-induced apoptosis.
Keywords: MAP Kinase Signaling System
18 October 2021 : EditorialEditorial: Global Initiatives Support the Use and Regulation of Digital Health Technology During the COVID-19 Pandemic
Med Sci Monit 2021; 27:e935123
11 October 2021 : Clinical ResearchClinical Features and Temporal Lung Radiographic Changes in 25 Patients Recovering from COVID-19 Pneumonia:...
Med Sci Monit In Press; DOI: 10.12659/MSM.933381
08 September 2021 : Clinical ResearchAcceptance of COVID-19 Vaccination and Its Associated Factors Among Cancer Patients Attending the Oncology ...
Med Sci Monit In Press; DOI: 10.12659/MSM.932788
18 October 2021 : EditorialEditorial: Global Initiatives Support the Use and Regulation of Digital Health Technology During the COVID-...
Med Sci Monit 2021; 27:e935123
18 Oct 2021 : Clinical ResearchAdverse Side Effects Associated with Corticosteroid Therapy: A Study in 39 Patients with Generalized Myasth...
Med Sci Monit In Press; DOI: 10.12659/MSM.933296
13 Oct 2021 : Clinical ResearchEndovascular Repair of Thoracic Aorta Injury: 17 Years of Single-Center Experience
Med Sci Monit In Press; DOI: 10.12659/MSM.934479
11 Oct 2021 : Clinical ResearchChallenges for Polish Community Pharmacists in Provision of Services to Immigrants and Non-Polish-Speakers ...
Med Sci Monit In Press; DOI: 10.12659/MSM.933678
Most Viewed Current Articles
20 Mar 2020 : Clinical ResearchSocial Capital and Sleep Quality in Individuals Who Self-Isolated for 14 Days During the Coronavirus Diseas...
Med Sci Monit 2020; 26:e923921
15 Apr 2020 : Clinical ResearchPsychological Impact and Coping Strategies of Frontline Medical Staff in Hunan Between January and March 20...
Med Sci Monit 2020; 26:e924171
05 May 2020 : Review articleAn Evidence Based Perspective on mRNA-SARS-CoV-2 Vaccine Development
Med Sci Monit 2020; 26:e924700