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Chai R, Xu C, Lu L, Liu X, Ma Z. Quercetin inhibits proliferation of and induces apoptosis in non-small-cell lung carcinoma via the lncRNA SNHG7/miR-34a-5p pathway. Immunopharmacol Immunotoxicol 2021; 43:693-703. [PMID: 34448661 DOI: 10.1080/08923973.2021.1966032] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
OBJECTIVE To determine the role of quercetin in non-small cell lung carcinoma (NSCLC) and the biological outcomes using transfection experiments. MATERIALS AND METHODS Real-time reverse transcription-PCR and data collection were performed to determine lncRNA and miRNA levels. Transwell assay was performed to assess the invasion ability of cells. Apoptosis of cells digested with trypsin was determined using the Annexin V-FITC kit. Luciferase activity was determined using the luciferase reporter gene system. Cell viability was tested using the Cell Counting Kit-8 assay. A xenograft mouse model was established to investigate the effects of quercetin on tumor growth. RESULTS The expression levels of the long non-coding RNA (lncRNA) small nucleolar RNA host gene 7 (SNHG7) were elevated in NSCLC cells, and the expression levels of the microRNA miR-34a-5p were decreased compared with those in normal cells. Further investigation revealed that quercetin decreased SNHG7 and elevated miR-34a-5p levels in NSCLC cells (p < .05). The luciferase reporter gene assay, RNA-binding protein immunoprecipitation assay, and transfection experiments revealed target-binding sequences between SNHG7 and miR-34a-5p. Overexpression of SNHG7 or miR-34a-5p inhibitor promoted NSCLC cell proliferation and accelerated tumor cell growth and metastasis. The therapeutic effect of quercetin on NSCLC cells was counteracted by co-transfection of SNHG7 mimic or miR-34a-5p inhibitor. Quercetin inhibited the survival, proliferation, migration, and invasion of NSCLC cells and enhanced their apoptosis. Using the mouse model, quercetin was shown to inhibit tumor growth. CONCLUSIONS Quercetin inhibits the proliferation and induces apoptosis of NSCLC cells by mediating signaling via the lncRNA SNHG7/miR-34a-5p pathway.
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Affiliation(s)
- Ruonan Chai
- Department of Respiration, General Hospital of North Theater Command, Shenyang, China
| | - Chong Xu
- Jinzhou Medical University, Jinzhou, China
| | - Liu Lu
- Jinzhou Medical University, Jinzhou, China
| | - Xinwei Liu
- Department of Orthopedics, General Hospital of Northern Theater Command, Shenyang, China
| | - Zhuang Ma
- Department of Respiration, General Hospital of North Theater Command, Shenyang, China
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Li ZH, Yu NS, Deng Q, Zhang Y, Hu YY, Liu G, Huang K. LncRNA SNHG7 Mediates the Chemoresistance and Stemness of Breast Cancer by Sponging miR-34a. Front Oncol 2020; 10:592757. [PMID: 33330080 PMCID: PMC7732589 DOI: 10.3389/fonc.2020.592757] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Accepted: 10/19/2020] [Indexed: 01/09/2023] Open
Abstract
Chemoresistance is considered to be a major cause of the recurrence and metastasis of breast cancer (BC). LncRNA SNHG7 has been reported to be upregulated in breast cancer and to promote tumor progression and metastasis. Nevertheless, the function and potential regulatory mechanism of SNHG7 in BC drug resistance are still largely unclear. This study indicated that SNHG7 was highly expressed in chemoresistant BC tissues and cells. Upregulated SNHG7 might predict a low pCR rate and poor clinical outcome in BC patients. Knockdown of SNHG7 enhanced drug sensitivity and drug-induced apoptosis in chemoresistant BC cells. In terms of the mechanism, miR-34a was found to be a target of SNHG7 and its expression in breast cancer tissues and chemoresistant cell lines was negatively correlated with SNHG7 expression. Importantly, sh-SNHG7 upregulated miR-34a expression, reduced the percentages of CD44+/CD24−cells, and inhibited sphere-formation and stem cell factor (Oct4, Nanog, SOX2) expression. Functional loss experiments showed that the repressive effect of SNHG7 knockdown on BC cell stemness was partially reversed by transfection with miR-34a inhibitors. In summary, this study indicated that SNHG7 contributed to the chemoresistance of BC and mediated chemoresistance and cancer stemness by sponging miR-34a.
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Affiliation(s)
- Zhi-Hua Li
- Department of Breast Surgery, Third Hospital of Nanchang, JiangXi Breast Specialist Hospital, Nanchang, China.,Key Laboratory of Breast Diseases in Jiangxi Province, Third Hospital of Nanchang, Nanchang, China
| | - Ni-Si Yu
- Gynecology Department, Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Qing Deng
- Department of Breast Surgery, Third Hospital of Nanchang, JiangXi Breast Specialist Hospital, Nanchang, China.,Key Laboratory of Breast Diseases in Jiangxi Province, Third Hospital of Nanchang, Nanchang, China
| | - Yulu Zhang
- Department of Breast Surgery, Third Hospital of Nanchang, JiangXi Breast Specialist Hospital, Nanchang, China
| | - Yang-Yang Hu
- Key Laboratory of Breast Diseases in Jiangxi Province, Third Hospital of Nanchang, Nanchang, China
| | - Gang Liu
- Department of Breast Surgery, Third Hospital of Nanchang, JiangXi Breast Specialist Hospital, Nanchang, China.,Key Laboratory of Breast Diseases in Jiangxi Province, Third Hospital of Nanchang, Nanchang, China
| | - Kedi Huang
- Key Laboratory of Breast Diseases in Jiangxi Province, Third Hospital of Nanchang, Nanchang, China.,Orthopedics Department, Third Hospital of Nanchang, Nanchang, China
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Zhang P, Shi L, Song L, Long Y, Yuan K, Ding W, Deng L. LncRNA CRNDE and lncRNA SNHG7 are Promising Biomarkers for Prognosis in Synchronous Colorectal Liver Metastasis Following Hepatectomy. Cancer Manag Res 2020; 12:1681-1692. [PMID: 32210611 PMCID: PMC7069563 DOI: 10.2147/cmar.s233147] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 12/20/2019] [Indexed: 01/03/2023] Open
Abstract
Purpose Synchronous colorectal liver metastasis (SCLM) had limited availability of tools to predict survival and tumor recurrence. LncRNA CRNDE and lncRNA SNHG7 have been proven to be closely related to cancer progression. However, the predictive value of lncRNA CRNDE and lncRNA SNHG7 in cancer prognosis is still unclear. The purpose of this study was to investigate whether lncRNA CRNDE and lncRNA SNHG7 could be used as promising biomarkers for prognosis prediction of SCLM patients who underwent hepatectomy. Methods The expression profile of lncRNA CRNDE and lncRNA SNHG7 in serum of SCLM patients was examined by qRT-PCR. The relationship between lncRNA expression and clinicopathological characteristics was analyzed. The Cox proportional-hazards regression model and Kaplan-Meier analysis were performed to analyze the association between lncRNA expression and overall survival (OS) and tumor recurrence of SCLM patients. Results Levels of lncRNA CRNDE and lncRNA SNHG7 in patients who underwent recurrence or death were significantly higher than that of patients with recurrence-free or survival (P<0.01). Both lncRNA CRNDE high level and lncRNA SNHG7 high level showed a significant correlation with differentiation of primary tumor, invasion depth of primary focus, lymph node metastases, number of liver metastases, and liver metastasis grade. High levels of lncRNA CRNDE or lncRNA SNHG7 predicted shorter recurrence time, shorter OS time, higher recurrence rate and lower OS rate. Furthermore, lncRNA CRNDE and lncRNA SNHG7 were independent risk factors for high recurrence and poor OS in SCLM underwent hepatectomy. Conclusion Taken together, lncRNA CRNDE and lncRNA SNHG7 could be promising biomarkers for prediction of OS and tumor recurrence in SCLM underwent hepatectomy.
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Affiliation(s)
- Peixian Zhang
- Department of Oncology, Yan'an Hospital of Kunming City & Yan'an Hospital Affiliated to Kunming Medical University, Kunming, Yunnan, People's Republic of China
| | - Lan Shi
- Department of Oncology, Yan'an Hospital of Kunming City & Yan'an Hospital Affiliated to Kunming Medical University, Kunming, Yunnan, People's Republic of China
| | - Linjing Song
- Department of Oncology, Yan'an Hospital of Kunming City & Yan'an Hospital Affiliated to Kunming Medical University, Kunming, Yunnan, People's Republic of China
| | - Yi Long
- Department of Oncology, Yan'an Hospital of Kunming City & Yan'an Hospital Affiliated to Kunming Medical University, Kunming, Yunnan, People's Republic of China
| | - Kehua Yuan
- Department of Oncology, Yan'an Hospital of Kunming City & Yan'an Hospital Affiliated to Kunming Medical University, Kunming, Yunnan, People's Republic of China
| | - Wanbao Ding
- Department of Oncology, Yan'an Hospital of Kunming City & Yan'an Hospital Affiliated to Kunming Medical University, Kunming, Yunnan, People's Republic of China
| | - Lei Deng
- Department of Oncology, Yan'an Hospital of Kunming City & Yan'an Hospital Affiliated to Kunming Medical University, Kunming, Yunnan, People's Republic of China
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Zhao D, Zhang H, Long J, Li M. LncRNA SNHG7 Functions as an Oncogene in Cervical Cancer by Sponging miR-485-5p to Modulate JUND Expression. Onco Targets Ther 2020; 13:1677-1689. [PMID: 32161467 PMCID: PMC7049860 DOI: 10.2147/ott.s237802] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 02/03/2020] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Long non-coding RNA (LncRNA) SNHG7 is involved in the development of multiple cancers. However, its role in cervical cancer (CC) has not been elucidated. This study aimed to explore the function of SNHG7 in CC progression and the underlying mechanisms. MATERIALS AND METHODS The expression levels of SNHG7 and miR-485-5p in CC tissues and cell lines were measured by qPCR. Functional experiments including CCK-8 assay, wound healing assay, transwell assay, flow cytometry, Western blot, luciferases reporter assay and immunoprecipitation (RIP) were performed to explore the SNHG7/miR-485-5p/JUND pathway. Additionally, in vivo study was carried out by establishing tumor xenograft models. RESULTS We found that SNHG7 was markedly enhanced in CC tissues and cell lines, and associated with poor clinical characteristics. In vitro, knockdown of SNHG7 inhibited CC cell proliferation, migration and invasion, as well as aggravated cell apoptosis. As to mechanism investigation, rescue experiments revealed that miR-485-5p inhibitor could partially reverse the effects on CC cells induced by SNHG7 knockdown. SNHG7 upregulated JUND expression via miR-485-5p. Moreover, tumor xenograft models were established to confirm the findings in vivo. CONCLUSION SNHG7 promoted CC progression through miR-485-5p/JUND axis. The SNHG7/miR-485-5p/JUND pathway might provide a novel therapeutic target for CC treatment.
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Affiliation(s)
- Danyang Zhao
- Department of Reproductive Center, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Province, People’s Republic of China
| | - Hui Zhang
- Department of Obstetrics, Chongzuo People’s Hospital, Chongzuo, Guangxi Province, People’s Republic of China
| | - Jianxiong Long
- School of Public Health of Guangxi Medical University, Nanning, Guangxi Province, People’s Republic of China
| | - Mujun Li
- Department of Reproductive Center, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Province, People’s Republic of China
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Chi R, Chen X, Liu M, Zhang H, Li F, Fan X, Wang W, Lu H. Role of SNHG7-miR-653-5p-STAT2 feedback loop in regulating neuroblastoma progression. J Cell Physiol 2019; 234:13403-13412. [PMID: 30623419 DOI: 10.1002/jcp.28017] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 12/17/2018] [Indexed: 12/22/2022]
Abstract
Long noncoding RNAs (lncRNAs) are reported to be involved in the pathology of numerous cancers, including neuroblastoma (NB). lncRNA SNHG7 has been recognized as a carcinogen in several cancers, but its role in NB progression remains unknown. Our study revealed that SNHG7 expression was markedly higher in NB tissues than that in nontumor tissues. Besides, upregulated SNHG7 was greatly correlated with poor overall survival of NB patients. Functionally, the loss-of-function assays demonstrated that knockdown of SNHG7 inhibited cell proliferation, migration, invasion, and epithelial-mesenchymal transition in NB cells. Mechanically, the bioinformatics analysis predicted that miR-653-5p was the shared partner of SNHG7 and signal transducer and activator of transcription 2 (STAT2). Unsurprisingly, we further confirmed that SNHG7 could interact with miR-653-5p and therefore functioned as the ceRNA of STAT2 so as to regulate STAT2 expression in NB cells. Moreover, STAT2 expression was in inverse proportion to miR-653-5p level but in positive proportion to SNHG7 level in NB tissues. Importantly, the repressed NB progression induced by silenced SNHG7 was reversed by STAT2 overexpression or miR-653-5p inhibitors. Jointly, our findings elucidated SNHG7 facilitated NB progression through the miR-653-5p/STAT2 pathway, providing a novel therapeutic target and prognostic biomarker for this disease.
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Affiliation(s)
- Renjie Chi
- Department of Pediatric Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Xin Chen
- Department of Pediatric Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Ming Liu
- Department of Pediatric Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Huanyu Zhang
- Department of Pediatric Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Fujiang Li
- Department of Pediatric Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Xu Fan
- Department of Pediatric Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Weiwei Wang
- Department of Pediatric Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Hongting Lu
- Department of Pediatric Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
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