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Wang Y, Song J, He J, Zhang X, Lv Z, Dong F, Deng J. hsa_circ_0008500 regulates Benzo(a)pyrene-loaded gypsum-induced inflammation and apoptosis in human bronchial epithelial cells via activation of Ahr/C-myc pathways. Toxicol Lett 2024; 394:46-56. [PMID: 38408587 DOI: 10.1016/j.toxlet.2024.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 01/20/2024] [Accepted: 02/18/2024] [Indexed: 02/28/2024]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are major organic pollutants attached to fine particulate matter in the atmosphere. They induce lung inflammation, asthma, and other lung diseases. Exploring the toxic mechanism of PAHs on lung epithelial cells may provide a theoretical basis for the prevention and treatment of respiratory diseases induced by PAHs. In our study, 16 human bronchial epithelial (16HBE) cells were exposed to different concentrations of gypsum dust, Benzo(a)pyrene (BaP), and BaP-loaded gypsum dust for 24 hours. Gypsum dust loaded with BaP significantly increased the cytotoxicity of 16HBE cells, enhanced the production of lactate dehydrogenase (LDH), interleukin-6 (IL-6) and interleukin-8 (IL-8), induced cell apoptosis, and upregulate the expression of hsa_circ_0008500 (circ_0008500). The mechanism was studied with a BaP-loaded gypsum dust concentration of 1.25 mg/mL. StemRegenin 1 (SR1) pretreat significantly reduced the release of LDH, IL-6, and IL-8 and decreased the protein levels of Ahr、XAP2, C-myc, and p53. Second-generation sequencing indicated that circ_0008500 was highly expressed after 16HBE induced by BaP-loaded gypsum dust. Functional experiments confirmed that circ_0008500 promoted the inflammation and apoptosis of 16HBE cells induced by BaP-loaded gypsum dust by regulating the Ahr signaling pathway. Our study showed that fine particulate matter adsorption of BaP significantly increased the toxic effect of BaP on cells. By activating the Ahr/C-myc pathway, circ_0008500 promoted inflammation and apoptosis of 16HBE cells induced by BaP-loaded gypsum dust.
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Affiliation(s)
- Yujun Wang
- Department of Laboratory Medicine, North Sichuan Medical University, Nanchong 637000, China.
| | - Juan Song
- Department of Laboratory Medicine, Sichuan Santai People's Hospital, Mianyang 621100, China
| | - Jiarui He
- School of Laboratory Medicine, Chengdu Medical College, Chengdu 610500, China
| | - Xu Zhang
- Department of Clinical Laboratory, Sichuan Mianyang404 Hospital, Mianyang 621010, China
| | - Zhenzhen Lv
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China
| | - Faqin Dong
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China
| | - Jianjun Deng
- Department of Laboratory Medicine, North Sichuan Medical University, Nanchong 637000, China; Department of Clinical Laboratory, Sichuan Mianyang404 Hospital, Mianyang 621010, China.
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Chen W, Chen Z, Jia Y, Guo Y, Zheng L, Yao S, Shao Y, Li M, Mao R, Jiang Y. Circ_0008657 regulates lung DNA damage induced by hexavalent chromium through the miR-203a-3p/ATM axis. ENVIRONMENT INTERNATIONAL 2024; 185:108515. [PMID: 38394914 DOI: 10.1016/j.envint.2024.108515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 12/17/2023] [Accepted: 02/17/2024] [Indexed: 02/25/2024]
Abstract
Hexavalent chromium [Cr (VI)] is an important environmental pollutant and may cause lung injury when inhaled into the human body. Cr (VI) is genotoxic and can cause DNA damage, although the underlying epigenetic mechanisms remain unclear. To simulate the real-life workplace exposure to Cr (VI), we used a novel exposure dose calculation method. We evaluated the effect of Cr (VI) on DNA damage in human bronchial epithelial cells (16HBE and BEAS-2B) by calculating the equivalent real-time exposure dose of Cr (VI) (0 to 10 μM) in an environmental population. Comet experiments and olive tail moment measurements revealed increased DNA damage in cells exposed to Cr (VI). Cr (VI) treatment increased nuclear γ-H2AX foci and γ-H2AX protein expression, and caused DNA damage in the lung tissues of mice. An effective Cr (VI) dose (6 μM) was determined and used for cell treatment. Cr (VI) exposure upregulated circ_0008657, and knockdown of circ_0008657 decreased Cr (VI)-induced DNA damage, whereas circ_0008657 overexpression had the opposite effect. Mechanistically, we found that circ_0008657 binds to microRNA (miR)-203a-3p and subsequently regulates ATM serine/threonine kinase (ATM), a key protein involved in homologous recombination repair downstream of miR-203a-3p, thereby regulating DNA damage induced by Cr (VI). The present findings suggest that circ_0008657 competitively binds to miR-203a-3p to activate the ATM pathway and regulate the DNA damage response after environmental chemical exposure in vivo and in vitro.
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Affiliation(s)
- Wei Chen
- The Key Laboratory of Advanced Interdisciplinary Studies, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510120, China; Institute for Chemical Carcinogenesis, Guangzhou Medical University, Guangzhou 511436, China
| | - Zehao Chen
- The Key Laboratory of Advanced Interdisciplinary Studies, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510120, China; Institute for Chemical Carcinogenesis, Guangzhou Medical University, Guangzhou 511436, China
| | - Yangyang Jia
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Guangzhou 511436, China
| | - Yaozheng Guo
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Guangzhou 511436, China
| | - Liting Zheng
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Guangzhou 511436, China
| | - Shuwei Yao
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Guangzhou 511436, China
| | - Yueting Shao
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Guangzhou 511436, China
| | - Meizhen Li
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Guangzhou 511436, China
| | - Rulin Mao
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Guangzhou 511436, China
| | - Yiguo Jiang
- The Key Laboratory of Advanced Interdisciplinary Studies, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510120, China; Institute for Chemical Carcinogenesis, Guangzhou Medical University, Guangzhou 511436, China.
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Wang L, Ma X, Yu J, Lou Y. Negative regulation of miR-1288-3p/KRT4 axis through a circular RNA in oral cancer. J Biochem Mol Toxicol 2022; 36:e23118. [PMID: 35707935 DOI: 10.1002/jbt.23118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 04/21/2022] [Accepted: 05/28/2022] [Indexed: 11/09/2022]
Abstract
Circular RNA (circRNA) has been widely reported to be involved in oral squamous cell carcinoma (OSCC), while the way in which hsa_circ_0096042 affects OSCC remains unclear. The hsa_circ_0096042, miR-1288-3p, and KRT4 expression in OSCC tissues and cell lines were detected by quantitative reverse-transcription polymerase chain reaction. Based on the overexpression of hsa_circ_0096042, miR-1288-3p, or KRT4, the viability and proliferation of OSCC cells were analyzed by cell counting kit-8 and colony formation assay, and the protein levels of Bax and Bcl-2 were detected by western blot, and the growth of cancer cells in vivo was analyzed by xenograft experiment. In addition, the database was used to predict the binding of hsa_circ_0096042, miR-1288-3p, and KRT4, and the interaction was confirmed by luciferase, RIP, and RNA pull-down assay. Hsa_circ_0096042 and KRT4 were abnormally downregulated and miR-1288-3p was upregulated in OSCC. Hsa_circ_0096042 overexpression restrained the proliferation and viability of OSCC cells, facilitated apoptosis, and inhibited the growth of cancer cells in vivo. Hsa_circ_0096042 bound to miR-1288-3p, whose upregulation promoted OSCC progression and eliminated the effects of overexpression of hsa_circ_0096042 on OSCC cells. KRT4 was the target gene for miR-1288-3p. Hsa_circ_0096042 plays an antitumor role in OSCC via miR-1288-3p/KRT4 axis.
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Affiliation(s)
- Lu Wang
- Department of stomatology, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou, Henan, China
| | - Xin Ma
- Department of stomatology, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou, Henan, China
| | - Jie Yu
- Department of stomatology, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou, Henan, China
| | - Ying Lou
- Department of stomatology, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou, Henan, China
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Liu Y, Hua Q, Li M, Li X, Chen W, Zeng H, Diao Q, Shi C, Ling Y, Jiang Y. Circular RNA circNIPBL promotes NNK-induced DNA damage in bronchial epithelial cells via the base excision repair pathway. Arch Toxicol 2022; 96:2049-2065. [PMID: 35435490 DOI: 10.1007/s00204-022-03297-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 03/31/2022] [Indexed: 01/18/2023]
Abstract
Environmental chemical exposure often causes DNA damage, which leads to cellular dysfunction and the development of diseases. 4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK), a tobacco-specific carcinogen that is known to cause DNA damage, while remains unknown about the underlying mechanism. In this study, simulated doses of NNK exposure in smokers, ranging from 50 to 300 μM, were used to detect the DNA damage effects of NNK in two human bronchial epithelial cells, 16HBE and BEAS-2B. The comet assay revealed increased DNA damage in response to NNK treatment, as measured by increased Olive tail moment (OTM). NNK treatment also led to elevated foci formation and protein expression of γ-H2AX, a DNA damage sensor. Dysregulation of proliferation, cell cycle arrest and apoptosis, was also observed in NNK-treated cells. Furthermore, the most effective dose of NNK (300 μM) was used in subsequent mechanistic studies. A circular RNA circNIPBL was identified to be significantly up-regulated in NNK-treated cells, circNIPBL knockdown successfully alleviated NNK-induced DNA damage and reversed the cellular dysregulation, while circNIPBL overexpression had the opposite effect. Mechanistically, we identified an interaction between circNIPBL and PARP1, a critical enzyme of the base excision repair (BER) pathway. CircNIPBL silencing successfully alleviated the NNK-induced inhibition of BER pathway proteins, including PARP1, XRCC1, PCNA and FEN1, while overexpression of circNIPBL had the opposite effect. In summary, our study shows for the first time that circNIPBL promotes NNK-induced DNA damage and cellular dysfunction through the BER pathway. In addition, our findings reveal the crucial role of epigenetic regulation in carcinogen-induced genetic lesions and further our understanding of environmental carcinogenesis.
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Affiliation(s)
- Yufei Liu
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, China.,Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China
| | - Qiuhan Hua
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, China.,Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China
| | - Meizhen Li
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China
| | - Xueqi Li
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China
| | - Wei Chen
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China
| | - Huixian Zeng
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China
| | - Qinqin Diao
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China
| | - Changhong Shi
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China
| | - Yihui Ling
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China
| | - Yiguo Jiang
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, China. .,Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China.
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Zhang S, Zheng N, Chen X, Du K, Yang J, Shen L. Establishment and Validation of a Ferroptosis-Related Long Non-Coding RNA Signature for Predicting the Prognosis of Stomach Adenocarcinoma. Front Genet 2022; 13:818306. [PMID: 35242169 PMCID: PMC8886230 DOI: 10.3389/fgene.2022.818306] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 01/24/2022] [Indexed: 12/11/2022] Open
Abstract
Background: Ferroptosis is a form of regulated cell death that follows cell membrane damage and mostly depends on iron-mediated oxidative. Long non-coding RNAs (LncRNAs) are associated with the development of a variety of tumors. Till date, LncRNAs have been reported to intervene in ferroptosis. Therefore, we intended to provide a prognostic ferroptosis-related-lncRNA signature in stomach adenocarcinoma (STAD). Methods: We downloaded ferroptosis-related genes from the FerrDb database and RNA sequencing data and clinicopathological characteristics from The Cancer Genome Atlas. Gene differential expression analysis was performed using the “limma” package. We used Cox regression analysis to determine the ferroptosis-related lncRNAs signature with the lowest AIC value. The Kaplan–Meier curve, ROC curve, and nomogram were used to evaluate the prognostic value of the risk score. Gene set enrichment analysis (GSEA) was used to explore the biologic functions of the three ferroptosis-related lncRNAs. LINC01615 expression in gastric cancer cell lines and tissues was measured by real-time PCR. A nuclear-cytoplasmic fractionation assay was used to analyze the subcellular localization for LINC01615. Furthermore, we used bioinformatics to predict potential target microRNAs (miRNAs) of LINC01615 and their target ferroptosis-related mRNAs. Results: Three ferroptosis-related-lncRNA signatures (AP000695.2, AL365181.3, and LINC01615) were identified, and then Kaplan–Meier, Cox regression analyses, and ROC curve confirmed that the ferroptosis-related-lncRNA model could predict the prognosis of STAD. The GSEA indicated that the three ferroptosis-related lncRNAs might be related to the extracellular matrix and cellular activities. LINC01615 is highly expressed in gastric cancer cell lines and tissues. A nuclear-cytoplasmic fractionation assay confirmed that in gastric cancer cell lines, most LINC01615 was enriched in the cytoplasm. Bioinformatics further predicts four potential target miRNAs of LINC01615 and then figured out 26 target ferroptosis-related mRNAs. Conclusion: We established a three-ferroptosis-related-lncRNA model (AP000695.2, AL365181.3, and LINC01615) that can predict the prognosis of STAD patients. We also expected to provide a promising target for LINC01615 for research in the future, which was highly expressed in gastric cancer and cell lines and acted as a ceRNA to get involved in ferroptosis.
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Affiliation(s)
- Shuqiong Zhang
- Department of Clinical Laboratory, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Naisheng Zheng
- Department of Clinical Laboratory, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaocui Chen
- Department of Clinical Laboratory, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Kun Du
- Department of Clinical Laboratory, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Junyao Yang
- Department of Clinical Laboratory, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lisong Shen
- Department of Clinical Laboratory, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Faculty of Medical Laboratory Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Xin Hua Children's Hospital, Shanghai, China
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