scholarly journals Transcriptome Analysis of Phycocyanin-Mediated Inhibitory Functions on Non-Small Cell Lung Cancer A549 Cell Growth

Marine Drugs ◽  
2018 ◽  
Vol 16 (12) ◽  
pp. 511 ◽  
Author(s):  
Shuai Hao ◽  
Shuang Li ◽  
Jing Wang ◽  
Lei Zhao ◽  
Yan Yan ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Small Cell Lung Cancer ◽  
Cell Lung Cancer ◽  
Transcriptome Analysis ◽  
A549 Cells ◽  
Underlying Mechanism ◽  
Small Cell ◽  
Small Cell Lung ◽  
Protein Protein Interaction ◽  
Differential Genes

Phycocyanin (PC), derived from cyanobacteria and Spirulina cells, is a type of natural antineoplastic marine protein. It has been reported that phycocyanin exerts an antitumor function in non-small cell lung cancer (NSCLC) cells, but the underlying mechanism has not been elucidated. In this research, a transcriptome study was performed to investigate the regulatory mechanisms of phycocyanin on human NSCLC A549 cells. The survival rate and proliferation ability of A549 cells were markedly reduced by phycocyanin, along with abnormal morphologic changes. The transcriptome analysis showed that 2970 genes were differentially expressed after phycocyanin treatment in A549 cells, including 1431 down-regulated and 1539 up-regulated genes. Gene ontology and KEGG analysis suggested that some classical pathways, such as Wnt, NF-κB, and PI3K-AKT signaling, were significantly enriched. Strikingly, protein–protein interaction (PPI) analysis showed that ubiquitin-C (UBC) occupied the highest degree (the highest number of interactions) in differential genes, indicating that it might play a key role in the phycocyanin-mediated regulatory process in A549 cells. Moreover, qRT-PCR results showed consistent expression trends of differential genes with transcriptome analysis. Consequently, this study has provided a theoretical basis for regulation of phycocyanin in A549 cells, which lays a foundation for the treatment of NSCLC.

Phanginin R Induces Cytoprotective Autophagy via JNK/c-Jun Signaling Pathway in Non-Small Cell Lung Cancer A549 Cells

2020 ◽  
Vol 20 (8) ◽  
pp. 982-988 ◽  
Author(s):  
Le-Le Zhang ◽  
Han Bao ◽  
Yu-Lian Xu ◽  
Xiao-Ming Jiang ◽  
Wei Li ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Small Cell Lung Cancer ◽  
Signaling Pathway ◽  
Cell Lung Cancer ◽  
Biological Activities ◽  
A549 Cells ◽  
Immunofluorescence Assay ◽  
Small Cell ◽  
Autophagic Flux ◽  
Small Cell Lung

Background: Cassane-type diterpenoids are widely distributed in the medical plants of genus Caesalpinia. To date, plenty of cassane diterpenoids have been isolated from the genus Caesalpinia, and some of them were documented to exhibit multiple biological activities. However, the effects of these compounds on autophagy have never been reported. Objective: To investigate the effects and mechanisms of the cassane diterpenoids including Phanginin R (PR) on autophagy in Non-Small Cell Lung Cancer (NSCLC) A549 cells. Methods: Western blot analysis and immunofluorescence assay were performed to investigate the effects of the compounds on autophagic flux in A549 cells. The pathway inhibitor and siRNA interference were used to investigate the mechanism of PR. MTT assay was performed to detect cell viability. Results: PR treatment upregulated the expression of phosphatidylethanolamine-modified microtubule-associated protein Light-Chain 3 (LC3-II) in A549 cells. Immunofluorescence assay showed that PR treatment increased the production of red-fluorescent puncta in mRFP-GFP-LC3 plasmid-transfected cells, indicating PR promoted autophagic flux in A549 cells. PR treatment activated the c-Jun N-terminal Kinase (JNK) signaling pathway while it did not affect the classical Akt/mammalian Target of Rapamycin (mTOR) pathway. Pretreatment with the JNK inhibitor SP600125 or siRNA targeting JNK or c-Jun suppressed PR-induced autophagy. In addition, cotreatment with the autophagy inhibitor Chloroquine (CQ) or inhibition of the JNK/c-Jun signaling pathway increased PR-induced cytotoxicity. Conclusion: PR induced cytoprotective autophagy in NSCLC A549 cells via the JNK/c-Jun signaling pathway, and autophagy inhibition could further improve the anti-cancer potential of PR.

scholarly journals Combination of baicalein and docetaxel additively inhibits the growth of non-small cell lung cancer in vivo

2018 ◽  
Vol 01 (03) ◽  
pp. 213-218 ◽  
Author(s):  
Linwei Lu ◽  
Zhengxiao Zhao ◽  
Lumei Liu ◽  
Weiyi Gong ◽  
Jingcheng Dong
Keyword(s):  
Lung Cancer ◽  
Small Cell Lung Cancer ◽  
Cell Lung Cancer ◽  
A549 Cells ◽  
Small Cell ◽  
Small Cell Lung ◽  
Tumor Bearing ◽  
Liver And Kidney ◽  
To Receive

Objective: The objective of this study is to preliminarily evaluate the efficacy of the combination of baicalein and docetaxel on non-small cell lung cancer (NSCLC) in vivo. Methods: The subcutaneous model was established by inoculation of A549 cells, and then these tumor-bearing mice were randomly assigned to eight groups to receive normal saline (NS) as control, baicalein alone, Taxotere[Formula: see text] (docetaxel injection) alone or the combination of baicalein and Taxotere[Formula: see text]. The effect of the combination treatment was evaluated by [Formula: see text] value. Tumors were harvested for TUNEL and CD31 immunohistochemical staining and important organs for H&E staining. Results: Baicalein 50[Formula: see text]mg/kg plus docetaxel 10[Formula: see text]mg/kg significantly reduced tumor weight and inhibited the growth rate of tumor, displaying the additive effect indicated by the [Formula: see text] value. Increased apoptosis and decreased tumor angiogenesis also provided pathological evidence. Additionally, baicalein 50[Formula: see text]mg/kg plus docetaxel 10[Formula: see text]mg/kg did not increase toxicity in lung, liver and kidney. Conclusion: Baicalein 50[Formula: see text]mg/kg plus docetaxel 10[Formula: see text]mg/kg additively inhibits the growth of NSCLC in vivo, and the mechanism underlying remains to be discovered.

scholarly journals Kinesin superfamily protein 21B acts as an oncogene in non-small cell lung cancer

2020 ◽  
Author(s):  
Zhi-Gang Sun ◽  
Feng Pan ◽  
Jing-Bo Shao ◽  
Qian-Qian Yan ◽  
Lu Lu ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Small Cell Lung Cancer ◽  
Nude Mice ◽  
Cell Lung Cancer ◽  
A549 Cells ◽  
Small Cell ◽  
Normal Lung ◽  
Migration And Invasion ◽  
Small Cell Lung ◽  
Kinesin Superfamily

Abstract Background: Kinesin superfamily proteins (KIFs) serve as microtubule-dependent molecular motors, and are involved in the progression of many malignant tumors. In this study, we aimed to investigate the expression pattern and precise role of kinesin family member 21B (KIF21B) in non-small cell lung cancer (NSCLC). Methods: KIF21B expression in 72 cases of NSCLC tissues was measured by immunohistochemical staining (IHC). We used shRNA-KIF21B interference to silence KIF21B in NSCLC H1299 and A549 cells and normal lung epithelial bronchus BEAS-2B cells. The biological roles of KIF21B in the growth and metastasis abilities of NSCLC cells were measured by Cell Counting Kit-8 (CCK8), colony formation and Hoechst 33342/PI, wound-healing, and Transwell assays, respectively. Expression of apoptosis-related proteins was determined using western blot. The effect of KIF21B on tumor growth in vivo was examined using nude mice model. Results: KIF21B was up-regulated in NSCLC tissues, and correlated with pathological lymph node and pTNM stage, its high expression was predicted a poor prognosis of patients with NSCLC. Silencing of KIF21B mediated by lentivirus-delivered shRNA significantly inhibited the proliferation ability of H1299 and A549 cells. KIF21B knockdown increased apoptosis in H1299 and A549 cells, down-regulated the expression of Bcl-2 and up-regulated the expression of Bax and active Caspase 3. Moreover, KIF21B knockdown decreased the level of phosphorylated form of Akt (p-Akt) and Cyclin D1 expression in H1299 and A549 cells. In addition, silencing of KIF21B impeded the migration and invasion of H1299 and A549 cells. Further, silencing of KIF 21B dramatically inhibited xenograft growth in BALB/c nude mice. However, silencing of KIF21B did not affect the proliferation, migration and invasion of BEAS-2B cells.Conclusions: These results reveal that KIF21B is up-regulated in NSCLC and acts as an oncogene in the growth and metastasis of NSCLC, which may function as a potential therapeutic target and a prognostic biomarker for NSCLC.

scholarly journals CACNA1B (Cav2.2) Overexpression and Its Association with Clinicopathologic Characteristics and Unfavorable Prognosis in Non-Small Cell Lung Cancer

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Xiaoyu Zhou ◽  
Wei Wang ◽  
Shu Zhang ◽  
Xudong Wang ◽  
Zhiyuan Tang ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Protein Expression ◽  
Small Cell Lung Cancer ◽  
Cell Lung Cancer ◽  
Underlying Mechanism ◽  
Small Cell ◽  
Small Cell Lung ◽  
Clinicopathologic Characteristics ◽  
Incidence And Mortality ◽  
Mrna And Protein Expression

CACNA1B (Cav2.2) encodes an N-type voltage-gated calcium channel (VGCC) ubiquitously expressed in brain and peripheral nervous system that is important for regulating neuropathic pain. Because intracellular calcium concentration is a key player in cell proliferation and apoptosis, VGCCs are implicated in tumorigenesis. Recent studies have identified CACNA1B (Cav2.2) being overexpressed in prostate and breast cancer tissues when compared to adjacent normal tissues; however, its role in non-small cell lung cancer (NSCLC) has not been investigated. In this study, we determined the mRNA and protein expression of CACNA1B (Cav2.2) in NSCLC tumorous and adjacent nontumorous tissues by quantitative reverse transcription PCR (qRT-PCR) and tissue microarray immunohistochemistry analysis (TMA-IHC), respectively. CACNA1B (Cav2.2) protein expressions in tumorous tissues were correlated with NSCLC patients’ clinical characteristics and overall survival. CACNA1B (Cav2.2) mRNA and protein expression levels were higher in NSCLC tumorous tissues than in nontumorous tissues. High CACNA1B (Cav2.2) protein expression was associated with higher TNM stages, and CACNA1B (Cav2.2) protein expression is an independent prognostic marker in NSCLC. Based on our results, we conclude that CACNA1B (Cav2.2) plays a role in NSCLC development and progression. Elucidating the underlying mechanism may help design novel treatment by specifically targeting the calcium regulation pathway for NSCLC, a devastating disease with increasing incidence and mortality in China.

scholarly journals QS-ZYX-1-61 induces apoptosis through topoisomerase II in human non-small-cell lung cancer A549 cells

2011 ◽  
Vol 103 (1) ◽  
pp. 80-87 ◽  
Author(s):  
Mei-Chuan Chen ◽  
Shiow-Lin Pan ◽  
Qian Shi ◽  
Zhiyan Xiao ◽  
Kuo-Hsiung Lee ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Small Cell Lung Cancer ◽  
Cell Lung Cancer ◽  
Topoisomerase Ii ◽  
A549 Cells ◽  
Small Cell ◽  
Small Cell Lung

Cigarette Smoke-Induced Reduction of 14-3-3σ Expression Promotes The Progression of Non-Small Cell Lung Cancer

2021 ◽  
Author(s):  
Longxia Dai ◽  
Quanwen Deng ◽  
Aibin Liu ◽  
Shuya He ◽  
Qiong Chen ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Protein Expression ◽  
Small Cell Lung Cancer ◽  
Cigarette Smoke ◽  
Cell Lung Cancer ◽  
A549 Cells ◽  
Small Cell ◽  
Small Cell Lung ◽  
Smoking Group ◽  
The Relationship

Abstract Background Lung cancer is a common malignant tumour and the leading cause of cancer death. Smoking is closely related to lung cancer, which can not only induce the occurrence of lung cancer but also affect its progress and prognosis. Objectives To investigated the relationship between smoking and 14-3-3σ protein expression in non-small-cell lung cancer (NSCLC), investigated the relationship between 14-3-3σ expression and cell migration in A549 cells induced by cigarette smoke extract (CSE) and explored whether DNA methylation plays a role in the decreased expression of 14-3-3σ induced by CSE. Methods 14-3-3σ protein expression was examined by immunohistochemistry in 152 NSCLC tissue samples. In vitro experiments were divided into three groups: The current smoking group (CS), the ex-smoking group (ES) and the normal control group (NC). Cell transfection was used for 14-3-3σ protein overexpression. The mRNA and protein expression levels of 14-3-3σ were detected by RT-PCR and Western blotting, respectively. Cell migration was detected by Transwell and wound-healing assays, and the methylation of 14-3-3σ was detected by methylation-specific PCR. Results 14-3-3σ protein expression was decreased in NSCLC patients with a history of smoking. The expression of 14-3-3σ was decreased in A549 cells treated with CSE. The migration capacity of A549 cells treated with CSE was enhanced. DNA methylation in the cigarette smoke-treated A549 cells was higher than that in the untreated cells. Conclusion Cigarette smoke induced reduction of 14-3-3σ expression can promote the progression of non-small cell lung cancer.

H9 Induces Apoptosis via the Intrinsic Pathway in Non-Small-Cell Lung Cancer A549 Cells

2015 ◽  
Vol 25 (3) ◽  
pp. 343-352 ◽  
Author(s):  
Sae-Bom Kwon ◽  
Min-Je Kim ◽  
Sun Young Ham ◽  
Ga Wan Park ◽  
Kang-Duk Choi ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Small Cell Lung Cancer ◽  
Cell Lung Cancer ◽  
A549 Cells ◽  
Small Cell ◽  
Intrinsic Pathway ◽  
Small Cell Lung

scholarly journals MiR-7-5p suppresses tumor metastasis of non-small cell lung cancer by targeting NOVA2

2019 ◽  
Vol 24 (1) ◽  
Author(s):  
Haiping Xiao
Keyword(s):  
Lung Cancer ◽  
Small Cell Lung Cancer ◽  
Cell Lung Cancer ◽  
Tumor Metastasis ◽  
Underlying Mechanism ◽  
Small Cell ◽  
Luciferase Reporter ◽  
Migration And Invasion ◽  
Small Cell Lung

Abstract Background Non-small cell lung cancer (NSCLC) is the leading cause of cancer mortality worldwide. Distant metastasis is thought to be one of the most important factors responsible for the failure of NSCLC therapy. MicroRNA-7-5p (miR-7-5p) has been demonstrated to be a tumor suppressor in breast cancer, hepatocarcinoma, prostate cancer and glioblastoma multiforme (GBM). However, its role in NSCLC is still not fully understood. This study evaluated the role of miR-7-5p in the progression of NSCLC and explored the underlying mechanism. Materials & methods The quantitative real-time PCR (qPCR), MTT, migration and invasion assays were used to evaluate the effects of miR-7-5p on the proliferation, migration and invasion of A549 and SPCA-1 cells. A tumor xenograft model was created to determine the effects of miR-7-5p on metastasis in vivo. The dual-luciferase reporter gene, neuro-oncological ventral antigen 2 (NOVA2) overexpression and western blotting assays were performed to explore the underlying mechanism. Results MiR-7-5p is downregulated in NSCLC tissues and lung cancer cell lines. It suppresses proliferation, migration, invasion and EMT marker expression in vitro and in vivo. Further study showed that miR-7-5p suppresses tumor metastasis of NSCLC by targeting NOVA2. Overexpression of NOVA2 attenuates the miR-7-5p-mediated inhibitory effect on lung cancer cells. Conclusion MiR-7-5p suppresses NSCLC metastasis. Targeting miR-7-5p may contribute to the success of NSCLC therapy.

Sign in / Sign up

Export Citation Format

Share Document