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Zheng X, Tang P, Li H, Ye T, Zhu X, He W, Cheng L, Cheng H. Cucurbitacin E elicits apoptosis in laryngeal squamous cell carcinoma by enhancing reactive oxygen species-regulated mitochondrial dysfunction and endoplasmic reticulum stress. Am J Cancer Res 2024; 14:3905-3921. [PMID: 39267666 PMCID: PMC11387858 DOI: 10.62347/hpqq9412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2024] [Accepted: 08/18/2024] [Indexed: 09/15/2024] Open
Abstract
Laryngeal squamous cell carcinoma (LSCC) is a prevalent head and neck neoplasm with escalating global morbidity and mortality rates. Despite the increasing burden of LSCC, the drugs currently approved for its treatment are limited. Therefore, it is necessary to identify novel and promising drugs that target LSCC. Cucurbitacin E (CuE) is a naturally oxygenated tetracyclic triterpenoid that suppresses several cancers. However, its anti-LSCC activity and the molecular mechanisms of action remain unclear. This study explored its impact on LSCC, revealing cell viability attenuation and apoptosis enhancement in vitro. Further investigations indicated that CuE significantly decreased mitochondrial membrane potential, thereby promoting cytochrome c release, increasing cleaved-Caspase 3 and cleaved-PARP levels, and triggering mitochondria-dependent apoptosis. Concurrently, exposure of LSCC cells to CuE enhanced endoplasmic reticulum (ER) stress, mobilized the protein kinase RNA-like endoplasmic reticulum kinase/initiation factor 2a/ATF4/C-EBP homologous protein pathway, and induced LSCC cell apoptosis. Finally, CuE markedly elevated intracellular reactive oxygen species (ROS) levels. When ROS were eliminated with N-acetylcysteine, CuE-mediated mitochondrial dysfunction, ER stress, and cell apoptosis were nearly abolished. Similar outcomes were observed in murine LSCC models. Together, these results highlight that CuE suppresses proliferation while triggering apoptosis in LSCC cells via ROS-regulated mitochondrial dysfunction and the ER stress pathway. Hence, CuE may serve as a promising candidate for LCSS treatment.
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Affiliation(s)
- Xucai Zheng
- Department of Oncology, The Second Hospital of Anhui Medical University Hefei 230601, Anhui, China
- Department of Head, Neck and Breast Surgery, The First Affiliated Hospital of USTC, Anhui Provincial Cancer Hospital Hefei 230031, Anhui, China
| | - Puze Tang
- Bachelor of Science in Mathematics, University of Liverpool United Kingdom
| | - Hui Li
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University Hefei 230032, Anhui, China
| | - Tingbo Ye
- Department of Head, Neck and Breast Surgery, The First Affiliated Hospital of USTC, Anhui Provincial Cancer Hospital Hefei 230031, Anhui, China
| | - Xu Zhu
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University Hefei 230032, Anhui, China
| | - Wei He
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University Hefei 230032, Anhui, China
| | - Ling Cheng
- Medical Intensive Care Unit, The First Affiliated Hospital of Anhui University of Chinese Medicine Hefei 230031, Anhui, China
| | - Huaidong Cheng
- Department of Oncology, The Second Hospital of Anhui Medical University Hefei 230601, Anhui, China
- Department of Oncology, Shenzhen Hospital of Southern Medical University Shenzhen 518000, Guangdong, China
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Zhang Y, Shang Z, Xu S, Zhou G, Liu A. ELF5-Regulated lncRNA-TTN-AS1 Alleviates Myocardial Cell Injury via Recruiting PCBP2 to Increase CDK6 Stability in Myocardial Infarction. Mol Cell Biol 2024; 44:303-315. [PMID: 39034459 PMCID: PMC11296528 DOI: 10.1080/10985549.2024.2374083] [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: 11/15/2023] [Revised: 05/29/2024] [Accepted: 06/25/2024] [Indexed: 07/23/2024] Open
Abstract
Myocardial infarction (MI) seriously threatens the health of elderly people, and reducing myocardial injury is of great significance for the treatment of MI. LncRNA-TTN-AS1 shows protective effects on cardiomyocyte injury, while the role of TTN-AS1 in MI remains unknown. CCK8, flow cytometry, and JC-1 staining assessed cell viability, apoptosis and mitochondrial membrane potential (MMP), respectively. Cellular reactive oxygen species (ROS) and secreted lactate dehydrogenase (LDH) levels were measured. The interactions between ELF5, TTN-AS1, PCBP2 and CDK6 were explored using ChIP, luciferase reporter assay, RIP, and pull-down. The severity of MI in mice was evaluated using TTC, H&E, and TUNEL staining. The data revealed that OGD/R significantly induced ROS, mitochondrial injury and apoptosis in AC16 cells, while overexpression of ELF5 or TTN-AS1 reversed these phenomena. ELF5 transcriptionally activated TTN-AS1 through binding with its promoter. TTN-AS1 increased CDK6 stability via recruiting PCBP2. CDK6 knockdown abolished the inhibitory effects of TTN-AS1 overexpression on OGD/R-induced myocardial injury. Furthermore, overexpression of TTN-AS1 or ELF5 alleviated MI progression in mice by upregulating CDK6. Collectively, TTN-AS1 transcriptionally regulated by ELF5 alleviated myocardial apoptosis and injury during MI via recruiting PCBP2 to increase CDK6 stability, which shed new lights on exploring new strategies against MI.
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Affiliation(s)
- Yonglin Zhang
- Department of Cardiology, Binhai County People’s Hospital, Binhai, Jiangsu Province, China
| | - Zhenglu Shang
- Department of Cardiology, Wuxi Huishan District People’s Hospital, Wuxi, Jiangsu Province, China
| | - Shucan Xu
- Department of Cardiology, Binhai County People’s Hospital, Binhai, Jiangsu Province, China
| | - Guangzhi Zhou
- Department of Cardiology, Binhai County People’s Hospital, Binhai, Jiangsu Province, China
| | - Aijun Liu
- Department of Cardiology, Binhai County People’s Hospital, Binhai, Jiangsu Province, China
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Lai Y, Guo S, Tang Q, Chang G, Zhang H, Li B, Feng Q, Hu K, Xu Z, Gao X, Zhang Q, Yi H, Song D, Zhang Y, Peng Y, Cai H, Zhu W, Shi J. Dihydrocelastrol induces cell death and suppresses angiogenesis through BCR/AP-1/junb signalling in diffuse large B cell lymphoma. Arch Biochem Biophys 2024; 754:109929. [PMID: 38367794 DOI: 10.1016/j.abb.2024.109929] [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: 12/07/2023] [Revised: 02/08/2024] [Accepted: 02/14/2024] [Indexed: 02/19/2024]
Abstract
Diffuse large B-cell lymphoma (DLBCL) is the most common type of non-Hodgkin lymphoma. Although treatment options have improved, a large proportion of patients show low survival rates, highlighting an urgent need for novel therapeutic strategies. The aim of this study was to investigate the efficacy of the new small-molecule compound dihydrocelastrol (DHCE), acquired through the structural modification of celastrol (CE), in the treatment of DLBCL. DHCE showed potent anti-lymphoma efficacy and synergistic effects with doxorubicin. DHCE triggered DLBCL cell apoptosis and G0/G1-phase blockade, thereby hindering angiogenesis. DHCE inhibited B-cell receptor cascade signalling and Jun B and p65 nuclear translocation, thereby suppressing pro-tumourigenic signalling. Finally, DHCE exerted lower toxicity than CE, which showed severe hepatic, renal, and reproductive toxicity in vivo. Our findings support further investigation of the clinical efficacy of DHCE against DLBCL.
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Affiliation(s)
- Yue Lai
- Department of Hematology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Shushan Guo
- Department of Hematology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Qiongwei Tang
- Department of Hematology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Gaomei Chang
- Department of Hematology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Hui Zhang
- Department of Hematology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Bo Li
- State Key Laboratory of Drug Research, Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Qilin Feng
- Department of Hematology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Ke Hu
- Department of Hematology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Zhijian Xu
- State Key Laboratory of Drug Research, Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Xuejie Gao
- Department of Hematology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Qikai Zhang
- Department of Hematology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Hongfei Yi
- Department of Hematology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Dongliang Song
- Department of Hematology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Yifei Zhang
- Department of Hematology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Yu Peng
- Department of Hematology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Haiyan Cai
- Department of Hematology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Weiliang Zhu
- State Key Laboratory of Drug Research, Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China.
| | - Jumei Shi
- Department of Hematology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China.
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