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Han Y, Zhang H, Zhang J, Wang Y, Zhou Y, Li H, Zhang Q, Niu Q. A study on cognitive impairment of mice exposed to nano-alumina particles by nasal drip. J Trace Elem Med Biol 2022; 73:127003. [PMID: 35660562 DOI: 10.1016/j.jtemb.2022.127003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 03/08/2022] [Accepted: 05/17/2022] [Indexed: 11/19/2022]
Abstract
BACKGROUND As an emerging nanomaterial, nano-alumina is widely used in chemical engineering, food and medicine due to its special physical and chemical properties, and its potential health hazards have attracted attention. OBJECTIVE Aim of this study is to understanding the effect and possible mechanism of nano-alumina on cognitive function in mice. METHODS Male healthy ICR mice were randomly assigned and given nasal drops of saline, nano-alumina (different doses) and micro-alumina for 30 days, respectively. Morris water maze test, step down test and open field test were used to detect learning and memory ability. Blood brain permeability was observed by immunofluorescence staining and lanthanum nitrate tracing, histopathological abnormalities in mice hippocampus was observed by thionine staining, the final determination of oxidative stress level in brain tissue was measured by using oxidative stress index detection kit and the level of LC3-Ⅱ and Caspase-3, 8, 9 proteins were detected by western blot. RESULTS In the cerebral cortex of mice exposed to nano-alumina particles, lanthanum nitrate particles adhered to vascular endothelial cells, and the expression of ZO-1 and Occuldin decreased and morphology was disordered; most neurons in hippocampus CA3 region showed balloon-like swelling and degeneration, nucleoli disappeared and apical dendrites broke; mice exposed to nano-alumina, the escape latency in Morris water maze increased compared with the control group(P < 0.05),and the residence time in the original platform quadrant shortened significantly(P < 0.05);the platform latency was significantly shortened and the number of errors increased in the step down test compared with the control group; the residence time in the center of mice the nano-alumina treated was significantly increased in open field test (P < 0.05). CONCLUSION The nano-alumina particles could be transported into the central nervous system via blood-brain barrier and olfactory bulb, impair learning and memory function in mice, which is more serious than the micro-alumina particles. The apoptosis of mice neurons caused by nano-alumina particles maybe due to the mixed neurotoxic effect of oxidative stress and the elemental toxicity of aluminum itself.
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Affiliation(s)
- Yingchao Han
- Department of Occupational Health, School of Public Health, Shanxi Medical University, China
| | - Huifang Zhang
- Department of Occupational Health, School of Public Health, Shanxi Medical University, China; Key Lab of Environmental Hazard and Health of Shanxi Province, Shanxi Medical University, China; Key Lab of Cellular Physiology of Education Ministry, Shanxi Medical University, China
| | - Jingsi Zhang
- Department of Occupational Health, School of Public Health, Shanxi Medical University, China
| | - Yanni Wang
- Department of Occupational Health, School of Public Health, Shanxi Medical University, China
| | - Yue Zhou
- Department of Occupational Health, School of Public Health, Shanxi Medical University, China
| | - Huan Li
- Department of Occupational Health, School of Public Health, Shanxi Medical University, China
| | - Qinli Zhang
- Department of Occupational Health, School of Public Health, Shanxi Medical University, China; Key Lab of Environmental Hazard and Health of Shanxi Province, Shanxi Medical University, China; Key Lab of Cellular Physiology of Education Ministry, Shanxi Medical University, China
| | - Qiao Niu
- Department of Occupational Health, School of Public Health, Shanxi Medical University, China; Key Lab of Environmental Hazard and Health of Shanxi Province, Shanxi Medical University, China; Key Lab of Cellular Physiology of Education Ministry, Shanxi Medical University, China.
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Kang K, Choi Y, Moon H, You C, Seo M, Kwon G, Yun J, Beck B, Kang K. Epigenomic Analysis of RAD51 ChIP-seq Data Reveals cis-regulatory Elements Associated with Autophagy in Cancer Cell Lines. Cancers (Basel) 2021; 13:cancers13112547. [PMID: 34067336 PMCID: PMC8196894 DOI: 10.3390/cancers13112547] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 05/20/2021] [Indexed: 01/07/2023] Open
Abstract
Simple Summary RAD51 is a key enzyme involved in homologous recombination during DNA double-strand break repair. However, recent studies suggest that non-canonical roles of RAD51 may exist. The aim of our study was to assess regulatory roles of RAD51 by reanalyzing RAD51 ChIP-seq data in GM12878, HepG2, K562, and MCF-7 cell lines. We identified 5137, 2611, 7192, and 3498 RAD51-associated cis-regulatory elements in GM12878, HepG2, K562, and MCF-7 cell lines, respectively. Intriguingly, gene ontology analysis revealed that promoters of the autophagy pathway-related genes were most significantly occupied by RAD51 in all four cell lines, predicting a non-canonical role of RAD51 in regulating autophagy-related genes. Abstract RAD51 is a recombinase that plays a pivotal role in homologous recombination. Although the role of RAD51 in homologous recombination has been extensively studied, it is unclear whether RAD51 can be involved in gene regulation as a co-factor. In this study, we found evidence that RAD51 may contribute to the regulation of genes involved in the autophagy pathway with E-box proteins such as USF1, USF2, and/or MITF in GM12878, HepG2, K562, and MCF-7 cell lines. The canonical USF binding motif (CACGTG) was significantly identified at RAD51-bound cis-regulatory elements in all four cell lines. In addition, genome-wide USF1, USF2, and/or MITF-binding regions significantly coincided with the RAD51-associated cis-regulatory elements in the same cell line. Interestingly, the promoters of genes associated with the autophagy pathway, such as ATG3 and ATG5, were significantly occupied by RAD51 and regulated by RAD51 in HepG2 and MCF-7 cell lines. Taken together, these results unveiled a novel role of RAD51 and provided evidence that RAD51-associated cis-regulatory elements could possibly be involved in regulating autophagy-related genes with E-box binding proteins.
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Affiliation(s)
- Keunsoo Kang
- Department of Microbiology, College of Science & Technology, Dankook University, Cheonan 31116, Korea; (H.M.); (M.S.); (J.Y.)
- Correspondence: (K.K.); (K.K.); Tel.: +82-41-550-3456 (K.K.); +82-43-261-2295 (K.K.)
| | - Yoonjung Choi
- Deargen Inc., 193, Munji-ro, Yuseong-gu, Daejeon 34051, Korea; (Y.C.); (B.B.)
| | - Hyeonjin Moon
- Department of Microbiology, College of Science & Technology, Dankook University, Cheonan 31116, Korea; (H.M.); (M.S.); (J.Y.)
| | - Chaelin You
- Department of Biological Sciences and Biotechnology, Chungbuk National University, Cheongju 28644, Korea; (C.Y.); (G.K.)
| | - Minjin Seo
- Department of Microbiology, College of Science & Technology, Dankook University, Cheonan 31116, Korea; (H.M.); (M.S.); (J.Y.)
| | - Geunho Kwon
- Department of Biological Sciences and Biotechnology, Chungbuk National University, Cheongju 28644, Korea; (C.Y.); (G.K.)
| | - Jahyun Yun
- Department of Microbiology, College of Science & Technology, Dankook University, Cheonan 31116, Korea; (H.M.); (M.S.); (J.Y.)
| | - Boram Beck
- Deargen Inc., 193, Munji-ro, Yuseong-gu, Daejeon 34051, Korea; (Y.C.); (B.B.)
| | - Kyuho Kang
- Department of Biological Sciences and Biotechnology, Chungbuk National University, Cheongju 28644, Korea; (C.Y.); (G.K.)
- Correspondence: (K.K.); (K.K.); Tel.: +82-41-550-3456 (K.K.); +82-43-261-2295 (K.K.)
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Lindemann A, Patel AA, Tang L, Tanaka N, Gleber-Netto FO, Bartels MD, Wang L, McGrail DJ, Lin SY, Frank SJ, Frederick MJ, Myers JN, Osman AA. Combined Inhibition of Rad51 and Wee1 Enhances Cell Killing in HNSCC Through Induction of Apoptosis Associated With Excessive DNA Damage and Replication Stress. Mol Cancer Ther 2021; 20:1257-1269. [PMID: 33947685 DOI: 10.1158/1535-7163.mct-20-0252] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/20/2020] [Accepted: 04/28/2021] [Indexed: 12/22/2022]
Abstract
Despite advances in surgery, chemotherapy, and radiation, there are limited treatment options for advanced head and neck squamous cell carcinoma (HNSCC) and survival remains very poor. Therefore, effective therapies are desperately needed. Recently, selective exploitation of DNA damage and replication stress responses has become a novel approach for cancer treatment. Wee1 kinase and Rad51 recombinase are two proteins involved in regulating replication stress and homologous recombination repair in cancer cells. In this study, we investigated the combined effect of Rad51 inhibitor (B02) and Wee1 inhibitor (AZD1775) in vitro and in vivo in various HNSCC cell lines. Clonogenic survival assays demonstrated that B02 synergized with AZD1775 in vitro in all HNSCC cell lines tested. The synergy between these drugs was associated with forced CDK1 activation and reduced Chk1 phosphorylation leading to induction of excessive DNA damage and replication stress, culminating in aberrant mitosis and apoptosis. Our results showed that elevated Rad51 mRNA expression correlated with worse survival in HNSCC patients with HPV-positive tumors. The combination of B02 and AZD1775 significantly inhibited tumor growth in vivo in mice bearing HPV-positive HNSCC tumors as compared to HPV-negative HNSCC. This differential sensitivity appears to be linked to HPV-positive tumors having more in vivo endogenous replication stress owing to transformation by E6 and E7 oncogenes. Furthermore, addition of B02 radiosensitized the HPV-negative HNSCC tumors in vitro and in vivo In conclusion, our data implicate that a novel rational combination with Rad51 and Wee1 inhibitors holds promise as synthetic lethal therapy, particularly in high-risk HPV-positive HNSCC.
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Affiliation(s)
- Antje Lindemann
- Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Ameeta A Patel
- Department of Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Lin Tang
- Department of Cellular and Molecular Medicine, The University of Arizona Health Sciences, College of Medicine, Tucson, Arizona
| | - Noriaki Tanaka
- Department of Dentistry and Oral Surgery, Osaka Police Hospital, Osaka, Japan
| | - Frederico O Gleber-Netto
- Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Mason D Bartels
- Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Li Wang
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Daniel J McGrail
- Department of Systems Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Shiaw-Yih Lin
- Department of Systems Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Steven J Frank
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Mitchell J Frederick
- Department of Otolaryngology-Head and Neck Surgery, Baylor College of Medicine, Houston, Texas
| | - Jeffrey N Myers
- Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas.
| | - Abdullah A Osman
- Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas.
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Zhuang W, Ben X, Zhou Z, Ding Y, Tang Y, Huang S, Deng C, Liao Y, Zhou Q, Zhao J, Wang G, Xu Y, Wen X, Zhang Y, Cai S, Chen R, Qiao G. Identification of a Ten-Gene Signature of DNA Damage Response Pathways with Prognostic Value in Esophageal Squamous Cell Carcinoma. JOURNAL OF ONCOLOGY 2021; 2021:3726058. [PMID: 34976055 PMCID: PMC8716225 DOI: 10.1155/2021/3726058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 11/27/2021] [Indexed: 02/06/2023]
Abstract
Molecular prognostic signatures are critical for treatment decision-making in esophageal squamous cell cancer (ESCC), but the robustness of these signatures is limited. The aberrant DNA damage response (DDR) pathway may lead to the accumulation of mutations and thus accelerate tumor progression in ESCC. Given this, we applied the LASSO Cox regression to the transcriptomic data of DDR genes, and a prognostic DDR-related gene expression signature (DRGS) consisting of ten genes was constructed, including PARP3, POLB, XRCC5, MLH1, DMC1, GTF2H3, PER1, SMC5, TCEA1, and HERC2. The DRGS was independently associated with overall survival in both training and validation cohorts. The DRGS achieved higher accuracy than six previously reported multigene signatures for the prediction of prognosis in comparable cohorts. Furtherly, a nomogram incorporating DRGS and clinicopathological features showed improved predicting performance. Taken together, the DRGS was identified as a novel, robust, and effective prognostic indicator, which may refine the scheme of risk stratification and management in ESCC patients.
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Affiliation(s)
- Weitao Zhuang
- Department of Thoracic Surgery, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
- Shantou University Medical College, Shantou 515041, China
| | - Xiaosong Ben
- Department of Thoracic Surgery, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Zihao Zhou
- Department of Thoracic Surgery, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Yu Ding
- Department of Thoracic Surgery, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou 510515, China
| | - Yong Tang
- Department of Thoracic Surgery, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Shujie Huang
- Department of Thoracic Surgery, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
- Shantou University Medical College, Shantou 515041, China
| | - Cheng Deng
- Department of Thoracic Surgery, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Yuchen Liao
- Burning Rock Biotech, Guangzhou 510300, China
| | | | - Jing Zhao
- Burning Rock Biotech, Guangzhou 510300, China
| | | | - Yu Xu
- Burning Rock Biotech, Guangzhou 510300, China
| | | | - Yuzi Zhang
- Burning Rock Biotech, Guangzhou 510300, China
| | - Shangli Cai
- Burning Rock Biotech, Guangzhou 510300, China
| | - Rixin Chen
- Department of Thoracic Surgery, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
- Research Center of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Guibin Qiao
- Department of Thoracic Surgery, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
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Expression of RAD51 and Its Clinical Impact in Oral Squamous Cell Carcinoma. Anal Cell Pathol (Amst) 2020; 2020:1827676. [PMID: 32190537 PMCID: PMC7072096 DOI: 10.1155/2020/1827676] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 02/03/2020] [Indexed: 01/26/2023] Open
Abstract
Purpose To examine the expression of RAD51 in oral squamous cell carcinoma (OSCC) and analyze its connection with pathological grade, clinical stage, and lymphatic metastasis potential. Methods For this study, 74 OSCC samples, 15 normal mucosa tissues, and 11 normal skin tissue samples were collected. RAD51 expression was investigated using immunohistochemistry. A follow-up visit was used to assess the prognosis of each patient. We compared RAD51 expression in oral mucosa epithelial cells (OMECs), keratinocytes, and tongue squamous cell carcinoma cells (TSCCs) by Western blot analysis. Results RAD51 expression was higher in tumor cells than in normal mucosal tissues. In addition, RAD51 expression was associated with higher tumor differentiation (P < 0.05). Also, RAD51 expression was higher (P < 0.05). Also, RAD51 expression was higher (P < 0.05). Also, RAD51 expression was higher ( Conclusion A strong positive correlation was found between RAD51 expression and the degree of malignancy in OSCC patients, suggesting that RAD51 could be an excellent prognostic indicator for OSCC patients.
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Roles for Autophagy in Esophageal Carcinogenesis: Implications for Improving Patient Outcomes. Cancers (Basel) 2019; 11:cancers11111697. [PMID: 31683722 PMCID: PMC6895837 DOI: 10.3390/cancers11111697] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 10/25/2019] [Accepted: 10/26/2019] [Indexed: 02/07/2023] Open
Abstract
Esophageal cancer is among the most aggressive forms of human malignancy with five-year survival rates of <20%. Autophagy is an evolutionarily conserved catabolic process that degrades and recycles damaged organelles and misfolded proteins to maintain cellular homeostasis. While alterations in autophagy have been associated with carcinogenesis across tissues, cell type- and context-dependent roles for autophagy have been reported. Herein, we review the current knowledge related to autophagy in esophageal squamous cell carcinoma (ESCC) and esophageal adenocarcinoma (EAC), the two most common subtypes of esophageal malignancy. We explore roles for autophagy in the development and progression of ESCC and EAC. We then continue to discuss molecular markers of autophagy as they relate to esophageal patient outcomes. Finally, we summarize current literature examining roles for autophagy in ESCC and EAC response to therapy and discuss considerations for the potential use of autophagy inhibitors as experimental therapeutics that may improve patient outcomes in esophageal cancer.
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Zheng K, He Z, Kitazato K, Wang Y. Selective Autophagy Regulates Cell Cycle in Cancer Therapy. Theranostics 2019; 9:104-125. [PMID: 30662557 PMCID: PMC6332805 DOI: 10.7150/thno.30308] [Citation(s) in RCA: 142] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Accepted: 10/30/2018] [Indexed: 12/21/2022] Open
Abstract
Aberrant function of cell cycle regulators results in uncontrolled cell proliferation, making them attractive therapeutic targets in cancer treatment. Indeed, survival of many cancers exclusively relies on these proteins, and several specific inhibitors are in clinical use. Although the ubiquitin-proteasome system is responsible for the periodic quality control of cell cycle proteins during cell cycle progression, increasing evidence clearly demonstrates the intimate interaction between cell cycle regulation and selective autophagy, important homeostasis maintenance machinery. However, these studies have often led to divergent rather than unifying explanations due to complexity of the autophagy signaling network, the inconsistent functions between general autophagy and selective autophagy, and the different characteristics of autophagic substrates. In this review, we highlight current data illustrating the contradictory and important role of cell cycle proteins in regulating autophagy. We also focus on how selective autophagy acts as a central mechanism to maintain orderly DNA repair and genome integrity by degrading specific cell cycle proteins, regulating cell division, and promoting DNA damage repair. We further discuss the ways in which selective autophagy may impact the cell cycle regulators, since failure to appropriately remove these can interfere with cell death-related processes, including senescence and autophagy-related cell death. Imbalanced cell proliferation is typically utilized by cancer cells to acquire resistance. Finally, we discuss the possibility of a potent anticancer therapeutic strategy that targets selective autophagy or autophagy and cell cycle together.
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Xie FJ, Zheng QQ, Qin J, Zhang LL, Han N, Mao WM. Autophagy Inhibition Stimulates Apoptosis in Oesophageal Squamous Cell Carcinoma Treated with Fasudil. J Cancer 2018; 9:1050-1056. [PMID: 29581784 PMCID: PMC5868172 DOI: 10.7150/jca.23388] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 01/28/2018] [Indexed: 01/19/2023] Open
Abstract
Fasudil has been proven to be a promising chemotherapeutic drug for various malignancies. However, the potential anticancer effects of fasudil in oesophageal squamous cell carcinoma (ESCC) remain to be established. We confirmed the RhoA activity is inhibited by fasudil in ESCC cells. Then measured the effects of fasudil on apoptosis and autophagy in ESCC. Our study showed fasudil could both induce ESCCs apoptosis and autophagy, and when fasudil-induced autophagy was inhibited by knockdown of the essential autophagy genes (Beclin 1 or ATG7), and pharmacologic agent (chloroquine) treatment, both treatments also significantly sensitized ESCC to fasudil-induced apoptosis, reducing cell viability in vitro. Our study showed autophagy inhibitors combined with fasudil could significantly induce ESCC apoptosis, which may provide a novel therapeutic strategy for ESCC.
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Affiliation(s)
- Fa-Jun Xie
- Department of Medical Oncology, Zhejiang Cancer Hospital, Hangzhou 310022, China.,Zhejiang Key Laboratory of Diagnosis and Treatment Technology on Thoracic Oncology (Lung and Oesophagus), Hangzhou 310022, China
| | - Qiu-Qing Zheng
- Zhejiang Key Laboratory of Diagnosis and Treatment Technology on Thoracic Oncology (Lung and Oesophagus), Hangzhou 310022, China.,Department of Ultrasonography, Zhejiang Cancer Hospital, Hangzhou 310022, China
| | - Jing Qin
- Department of Medical Oncology, Zhejiang Cancer Hospital, Hangzhou 310022, China.,Zhejiang Key Laboratory of Diagnosis and Treatment Technology on Thoracic Oncology (Lung and Oesophagus), Hangzhou 310022, China
| | - Ling-Ling Zhang
- Department of Medical Oncology, Peking University International Hospital, Beijing 102206, China
| | - Na Han
- Department of Medical Oncology, Zhejiang Cancer Hospital, Hangzhou 310022, China.,Zhejiang Key Laboratory of Diagnosis and Treatment Technology on Thoracic Oncology (Lung and Oesophagus), Hangzhou 310022, China
| | - Wei-Min Mao
- Zhejiang Key Laboratory of Diagnosis and Treatment Technology on Thoracic Oncology (Lung and Oesophagus), Hangzhou 310022, China.,Department of Thoracic Surgery, Zhejiang Cancer Hospital, Hangzhou 310022, China
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Huang N, Liu Z, Zhu J, Cui Z, Li Y, Yu Y, Sun F, Pan Q, Yang Q. Sirtuin 6 plays an oncogenic role and induces cell autophagy in esophageal cancer cells. Tumour Biol 2017; 39:1010428317708532. [PMID: 28653878 DOI: 10.1177/1010428317708532] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Sirtuin 6, a member of sirtuin family, is generally regarded as a tumor suppressor as it participates in suppressing hypoxia-inducible factor 1α and MYC transcription activity by deacetylating H3K9 (histone H3 lysine 9) and H3K56 (histone H3 lysine) at promoters of target genes, leading to the aerobic glycolysis inhibition and cell growth suppression. However, its expression has recently been reported to be highly elevated in a series of tumors, including prostate cancer, breast cancer, and non-small cell lung cancer, indicating that sirtuin 6 plays dual roles in tumorigenicity in a cell/tumor type-specific manner. To our knowledge, the biological roles of sirtuin 6 in esophageal cancer cells have still been underestimated. In the study, data from quantitative reverse transcriptase polymerase chain reaction-based assays and immunohistochemical assays revealed that sirtuin 6 was remarkably overexpressed in esophageal squamous tumor tissues. Moreover, its upregulation was closely related with clinical features, such as gender, pathology, tumor-node-metastasis, and cell differentiation. Subsequently, the biological tests showed that it promoted cell proliferation and induced the expression of Bcl2, a key anti-apoptotic factor, in esophageal carcinoma cells. Moreover, using the ratio of LC3II/I, a widely recognized autophagy biomarker, we showed that it apparently induced cell autophagy, which was further confirmed by the autophagy flux assays. In addition, results from western blotting assays and immunoprecipitation assays displayed that sirtuin 6 specifically interacted with ULK1 and positively regulated its activity by inhibiting its upstream factor mammalian target of rapamycin activity. In summary, our studies shed insights into the crucial functions of sirtuin 6 in esophageal carcinoma cells and provide evidence supporting sirtuin 6-based personalized therapies in esophageal carcinoma cell patients.
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Affiliation(s)
- Nan Huang
- 1 Department of Clinical Laboratory Medicine, Shanghai Tenth People's Hospital of Tongji University, Shanghai, China
| | - Zhiwei Liu
- 2 Department of Laboratory, Central Hospital of Panyu District, Guangzhou, China
| | - Jiabei Zhu
- 3 Department of Laboratory Medicine, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhongqi Cui
- 1 Department of Clinical Laboratory Medicine, Shanghai Tenth People's Hospital of Tongji University, Shanghai, China
| | - Yuguang Li
- 2 Department of Laboratory, Central Hospital of Panyu District, Guangzhou, China
| | - Yongchun Yu
- 4 Central Laboratory, Shanghai Municipal Hospital of Traditional Chinese Medicine Affiliated With Shanghai TCM University, Shanghai, China
| | - Fenyong Sun
- 1 Department of Clinical Laboratory Medicine, Shanghai Tenth People's Hospital of Tongji University, Shanghai, China
| | - Qiuhui Pan
- 3 Department of Laboratory Medicine, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qingyuan Yang
- 1 Department of Clinical Laboratory Medicine, Shanghai Tenth People's Hospital of Tongji University, Shanghai, China
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