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Gao L, Shay C, Teng Y. Cell death shapes cancer immunity: spotlighting PANoptosis. J Exp Clin Cancer Res 2024; 43:168. [PMID: 38877579 PMCID: PMC11179218 DOI: 10.1186/s13046-024-03089-6] [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: 03/26/2024] [Accepted: 06/05/2024] [Indexed: 06/16/2024] Open
Abstract
PANoptosis represents a novel type of programmed cell death (PCD) with distinctive features that incorporate elements of pyroptosis, apoptosis, and necroptosis. PANoptosis is governed by a newly discovered cytoplasmic multimeric protein complex known as the PANoptosome. Unlike each of these PCD types individually, PANoptosis is still in the early stages of research and warrants further exploration of its specific regulatory mechanisms and primary targets. In this review, we provide a brief overview of the conceptual framework and molecular components of PANoptosis. In addition, we highlight recent advances in the understanding of the molecular mechanisms and therapeutic applications of PANoptosis. By elucidating the complex crosstalk between pyroptosis, apoptosis and necroptosis and summarizing the functional consequences of PANoptosis with a special focus on the tumor immune microenvironment, this review aims to provide a theoretical basis for the potential application of PANoptosis in cancer therapy.
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Affiliation(s)
- Lixia Gao
- National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, College of Pharmacy, Chongqing University of Arts and Sciences, Chongqing, 402160, People's Republic of China
| | - Chloe Shay
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30322, USA
| | - Yong Teng
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30322, USA.
- Department of Hematology and Medical Oncology, Winship Cancer Institute, Emory University School of Medicine, 201 Dowman Dr, Atlanta, GA, 30322, USA.
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2
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Pandeya A, Kanneganti TD. Therapeutic potential of PANoptosis: innate sensors, inflammasomes, and RIPKs in PANoptosomes. Trends Mol Med 2024; 30:74-88. [PMID: 37977994 PMCID: PMC10842719 DOI: 10.1016/j.molmed.2023.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 09/20/2023] [Accepted: 10/04/2023] [Indexed: 11/19/2023]
Abstract
The innate immune system initiates cell death pathways in response to pathogens and cellular stress. Cell death can be either non-lytic (apoptosis) or lytic (PANoptosis, pyroptosis, and necroptosis). PANoptosis has been identified as an inflammatory, lytic cell death pathway driven by caspases and RIPKs that is regulated by PANoptosome complexes, making it distinct from other cell death pathways. Several PANoptosome complexes (including ZBP1-, AIM2-, RIPK1-, and NLRP12-PANoptosomes) have been characterized to date. Furthermore, PANoptosis is implicated in infectious and inflammatory diseases, cancers, and homeostatic perturbations. Therefore, targeting its molecular components offers significant potential for therapeutic development. This review covers PANoptosomes and their assembly, PANoptosome-mediated cell death mechanisms, and ongoing progress in developing therapeutics that target PANoptosis.
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Affiliation(s)
- Ankit Pandeya
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
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3
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Pang L, Guo S, Khan F, Dunterman M, Ali H, Liu Y, Huang Y, Chen P. Hypoxia-driven protease legumain promotes immunosuppression in glioblastoma. Cell Rep Med 2023; 4:101238. [PMID: 37858339 PMCID: PMC10694605 DOI: 10.1016/j.xcrm.2023.101238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 08/27/2023] [Accepted: 09/20/2023] [Indexed: 10/21/2023]
Abstract
Glioblastoma (GBM) is a hypoxic and "immune-cold" tumor containing rich stromal signaling molecules and cell populations, such as proteases and immunosuppressive tumor-associated macrophages (TAMs). Here, we seek to profile and characterize the potential proteases that may contribute to GBM immunosuppression. Legumain (LGMN) emerges as the key protease that is highly enriched in TAMs and transcriptionally upregulated by hypoxia-inducible factor 1-alpha (HIF1α). Functionally, the increased LGMN promotes TAM immunosuppressive polarization via activating the GSK-3β-STAT3 signaling pathway. Inhibition of macrophage HIF1α and LGMN reduces TAM immunosuppressive polarization, impairs tumor progression, enhances CD8+ T cell-mediated anti-tumor immunity, and synergizes with anti-PD1 therapy in GBM mouse models. Thus, LGMN is a key molecular switch connecting two GBM hallmarks of hypoxia and immunosuppression, providing an actionable therapeutic intervention for this deadly disease.
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Affiliation(s)
- Lizhi Pang
- Department of Neurological Surgery, Lou and Jean Malnati Brain Tumor Institute, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Songlin Guo
- Department of Neurological Surgery, Lou and Jean Malnati Brain Tumor Institute, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Fatima Khan
- Department of Neurological Surgery, Lou and Jean Malnati Brain Tumor Institute, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Madeline Dunterman
- Department of Neurological Surgery, Lou and Jean Malnati Brain Tumor Institute, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Heba Ali
- Department of Neurological Surgery, Lou and Jean Malnati Brain Tumor Institute, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Yang Liu
- Department of Neurological Surgery, Lou and Jean Malnati Brain Tumor Institute, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Yuyun Huang
- Department of Neurological Surgery, Lou and Jean Malnati Brain Tumor Institute, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Peiwen Chen
- Department of Neurological Surgery, Lou and Jean Malnati Brain Tumor Institute, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
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4
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Cai J, Hu Q, He Z, Chen X, Wang J, Yin X, Ma X, Zeng J. Scutellaria baicalensis Georgi and Their Natural Flavonoid Compounds in the Treatment of Ovarian Cancer: A Review. Molecules 2023; 28:5082. [PMID: 37446743 DOI: 10.3390/molecules28135082] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 06/21/2023] [Accepted: 06/27/2023] [Indexed: 07/15/2023] Open
Abstract
Ovarian cancer (OC) is one of the most common types of cancer in women with a high mortality rate, and the treatment of OC is prone to high recurrence rates and side effects. Scutellaria baicalensis (SB) is a herbal medicine with good anti-cancer activity, and several studies have shown that SB and its flavonoids have some anti-OC properties. This paper elucidated the common pathogenesis of OC, including cell proliferation and cell cycle regulation, cell invasion and metastasis, apoptosis and autophagy, drug resistance and angiogenesis. The mechanisms of SB and its flavonoids, wogonin, baicalein, baicalin, Oroxylin A, and scutellarein, in the treatment of OC, are revealed, such as wogonin inhibits proliferation, induces apoptosis, inhibits invasion and metastasis, and increases the cytotoxicity of the drug. Baicalein also inhibits vascular endothelial growth factor (VEGF) expression etc. Analyzing their advantages and disadvantages in treating OC provides a new perspective on the role of SB and its flavonoids in OC treatment. It serves as a resource for future OC research and development.
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Affiliation(s)
- Jiaying Cai
- TCM Regulating Metabolic Diseases Key Laboratory of Sichuan Province, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, China
- Department of Gastroenterology, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, China
- School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu 610075, China
| | - Qichao Hu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Zhelin He
- Endoscopy Center, Guang'an Hospital of Traditional Chinese Medicine, Guang'an 638000, China
| | - Xiaoyan Chen
- Endoscopy Center, Guang'an Hospital of Traditional Chinese Medicine, Guang'an 638000, China
| | - Jian Wang
- Endoscopy Center, Guang'an Hospital of Traditional Chinese Medicine, Guang'an 638000, China
| | - Xiang Yin
- Endoscopy Center, Guang'an Hospital of Traditional Chinese Medicine, Guang'an 638000, China
| | - Xiao Ma
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Jinhao Zeng
- TCM Regulating Metabolic Diseases Key Laboratory of Sichuan Province, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, China
- Department of Gastroenterology, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, China
- School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu 610075, China
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Wu X, Sun L, Xu F. NF-κB in Cell Deaths, Therapeutic Resistance and Nanotherapy of Tumors: Recent Advances. Pharmaceuticals (Basel) 2023; 16:783. [PMID: 37375731 DOI: 10.3390/ph16060783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 05/16/2023] [Accepted: 05/22/2023] [Indexed: 06/29/2023] Open
Abstract
The transcription factor nuclear factor-κB (NF-κB) plays a complicated role in multiple tumors. Mounting evidence demonstrates that NF-κB activation supports tumorigenesis and development by enhancing cell proliferation, invasion, and metastasis, preventing cell death, facilitating angiogenesis, regulating tumor immune microenvironment and metabolism, and inducing therapeutic resistance. Notably, NF-κB functions as a double-edged sword exerting positive or negative influences on cancers. In this review, we summarize and discuss recent research on the regulation of NF-κB in cancer cell deaths, therapy resistance, and NF-κB-based nano delivery systems.
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Affiliation(s)
- Xuesong Wu
- Department of Pathology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Liang Sun
- Key Laboratory of Disease Proteomics of Zhejiang Province, Zhejiang University, Hangzhou 310058, China
| | - Fangying Xu
- Key Laboratory of Disease Proteomics of Zhejiang Province, Zhejiang University, Hangzhou 310058, China
- Department of Pathology and Pathophysiology, and Department of Hepatobiliary and Pancreatic Surgery of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310005, China
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Nie S, Ni N, Chen N, Gong M, Feng E, Liu J, Liu Q. Development of a necroptosis-related gene signature and the immune landscape in ovarian cancer. J Ovarian Res 2023; 16:82. [PMID: 37095524 PMCID: PMC10127035 DOI: 10.1186/s13048-023-01155-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 04/06/2023] [Indexed: 04/26/2023] Open
Abstract
BACKGROUND Necroptosis is a novel type of programmed cell death distinct from apoptosis. However, the role of necroptosis in ovarian cancer (OC) remains unclear. The present study investigated the prognostic value of necroptosis-related genes (NRGs) and the immune landscape in OC. METHODS The gene expression profiling and clinical information were downloaded from the TCGA and GTEx databases. Differentially expressed NRGs (DE-NRGs) between OC and normal tissueswere identified. The regression analyses were conducted to screen the prognostic NRGs and construct the predictive risk model. Patients were then divided into high- and low-risk groups, and the GO and KEGG analyses were performed to explore bioinformatics functions between the two groups. Subsequently, the risk level and immune status correlations were assessed through the ESTIMATE and CIBERSORT algorithms. The tumor mutation burden (TMB) and the drug sensitivity were also analyzed based on the two-NRG signature in OC. RESULTS Totally 42 DE-NRGs were identified in OC. The regression analyses screened out two NRGs (MAPK10 and STAT4) with prognostic values for overall survival. The ROC curve showed a better predictive ability in five-year OS using the risk score. Immune-related functions were significantly enriched in the high- and low-risk group. Macrophages M1, T cells CD4 memory activated, T cells CD8, and T cells regulatory infiltration immune cells were associated with the low-risk score. The lower tumor microenvironment score was demonstrated in the high-risk group. Patients with lower TMB in the low-risk group showed a better prognosis, and a lower TIDE score suggested a better immune checkpoint inhibitor response in the high-risk group. Besides, cisplatin and paclitaxel were found to be more sensitive in the low-risk group. CONCLUSIONS MAPK10 and STAT4 can be important prognosis factors in OC, and the two-gene signature performs well in predicting survival outcomes. Our study provided novel ways of OC prognosis estimation and potential treatment strategy.
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Affiliation(s)
- Sipei Nie
- Department of Gynecology and Obstetrics, Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, 211100, Jiangsu, China
| | - Na Ni
- Department of Gynecology and Obstetrics, Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, 211100, Jiangsu, China
| | - Ningxin Chen
- Department of Gynecology and Obstetrics, Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, 211100, Jiangsu, China
| | - Min Gong
- Department of Gynecology and Obstetrics, Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, 211100, Jiangsu, China
| | - Ercui Feng
- Department of Preventive Health Care, Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, 211100, China
| | - Jinhui Liu
- Department of Gynecology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, 211100, Jiangsu, China.
| | - Qiaoling Liu
- Department of Gynecology and Obstetrics, Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, 211100, Jiangsu, China.
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Shibuya Y, Kudo K, Zeligs KP, Anderson D, Hernandez L, Ning F, Cole CB, Fergusson M, Kedei N, Lyons J, Taylor J, Korrapati S, Annunziata CM. SMAC Mimetics Synergistically Cooperate with HDAC Inhibitors Enhancing TNF-α Autocrine Signaling. Cancers (Basel) 2023; 15:cancers15041315. [PMID: 36831656 PMCID: PMC9954505 DOI: 10.3390/cancers15041315] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/06/2023] [Accepted: 02/13/2023] [Indexed: 02/22/2023] Open
Abstract
The overexpression of inhibitor of apoptosis (IAP) proteins is strongly related to poor survival of women with ovarian cancer. Recurrent ovarian cancers resist apoptosis due to the dysregulation of IAP proteins. Mechanistically, Second Mitochondrial Activator of Caspases (SMAC) mimetics suppress the functions of IAP proteins to restore apoptotic pathways resulting in tumor death. We previously conducted a phase 2 clinical trial of the single-agent SMAC mimetic birinapant and observed minimal drug response in women with recurrent ovarian cancer despite demonstrating on-target activity. Accordingly, we performed a high-throughput screening matrix to identify synergistic drug combinations with birinapant. SMAC mimetics in combination with an HDAC inhibitor showed remarkable synergy and was, therefore, selected for further evaluation. We show here that this synergy observed both in vitro and in vivo results from multiple convergent pathways to include increased caspase activation, HDAC inhibitor-mediated TNF-α upregulation, and alternative NF-kB signaling. These findings provide a rationale for the integration of SMAC mimetics and HDAC inhibitors in clinical trials for recurrent ovarian cancer where treatment options are still limited.
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Affiliation(s)
- Yusuke Shibuya
- Women’s Malignancies Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
- Department of Obstetrics and Gynecology, Division of Gynecology Oncology, Tohoku University School of Medicine, Miyagi 980-8574, Japan
| | - Kei Kudo
- Women’s Malignancies Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
- Department of Obstetrics and Gynecology, Division of Gynecology Oncology, Tohoku University School of Medicine, Miyagi 980-8574, Japan
| | - Kristen P. Zeligs
- Women’s Malignancies Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
- Gynecologic Cancer Center of Excellence, Department of Obstetrics and Gynecology, Uniformed Services University and Walter Reed National Military Medical Center, Bethesda, MD 20814, USA
- Department of Obstetrics, Gynecology and Reproductive Science, Division of Gynecologic Oncology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - David Anderson
- Women’s Malignancies Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
- Gynecologic Cancer Center of Excellence, Department of Obstetrics and Gynecology, Uniformed Services University and Walter Reed National Military Medical Center, Bethesda, MD 20814, USA
| | - Lidia Hernandez
- Women’s Malignancies Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Franklin Ning
- Women’s Malignancies Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Christopher B. Cole
- Women’s Malignancies Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Maria Fergusson
- Women’s Malignancies Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Noemi Kedei
- Collaborative Protein Technology Resource, MD 20814, USA
| | | | - Jason Taylor
- Astex Pharmaceuticals, Pleasanton, CA 94588, USA
| | - Soumya Korrapati
- Women’s Malignancies Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Christina M. Annunziata
- Women’s Malignancies Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
- Correspondence: ; Tel.: +1-240-760-6125
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Gong Z, Jia Q, Guo J, Li C, Xu S, Jin Z, Chu H, Wan YY, Zhu B, Zhou Y. Caspase-8 contributes to an immuno-hot microenvironment by promoting phagocytosis via an ecto-calreticulin-dependent mechanism. Exp Hematol Oncol 2023; 12:7. [PMID: 36635765 PMCID: PMC9835222 DOI: 10.1186/s40164-022-00371-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 12/30/2022] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Caspase-8 (Casp8) acts as an initiator in cell apoptosis signaling. However, the role of Casp8 in tuning the tumor immune microenvironment remains controversial due to the complicated crosstalk between immune-tolerogenic apoptotic cell death and immunogenic cell death cascades. METHODS The Cancer Genome Atlas (TCGA) and publicly accessible immune checkpoint blockade (ICB)-treated cohorts were used to investigate the clinical relevance of Casp8. A tumor-bearing mouse model was used to characterize changes in the tumor microenvironment and to explore the efficacy of ICB treatment under Casp8 knockout conditions. RESULTS By exploring TCGA datasets, we showed that the expression level of Casp8 was associated with an immuno-hot microenvironment across various solid tumor types. Casp8 deficiency leads to decreased CD8+ T cell infiltration and resistance to anti-PD-L1 therapy in a mouse model. Mechanistically, Casp8 deficiency or pharmacological disruption results in impaired ecto-calreticulin transition in tumor cells, which in turn hampers antigen presentation in draining lymph nodes. Furthermore, radiotherapy restored sensitivity to anti-PD-L1 treatment via elevated calreticulin surface expression. CONCLUSIONS Our data revealed a causative role of Casp8 in modulating the immunogenicity of tumor cells and responsiveness to ICB immunotherapies and proposed radiotherapy as a salvage approach to overcome Casp8 deficiency-mediated ICB resistance.
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Affiliation(s)
- Zhihua Gong
- grid.410570.70000 0004 1760 6682Department of Oncology, Xinqiao Hospital, Army Medical University, Chongqing, 400037 China ,grid.417298.10000 0004 1762 4928Chongqing Key Laboratory of Immunotherapy, Chongqing, 400037 China
| | - Qingzhu Jia
- grid.410570.70000 0004 1760 6682Department of Oncology, Xinqiao Hospital, Army Medical University, Chongqing, 400037 China ,grid.417298.10000 0004 1762 4928Chongqing Key Laboratory of Immunotherapy, Chongqing, 400037 China
| | - Jinming Guo
- grid.410570.70000 0004 1760 6682Department of Oncology, Xinqiao Hospital, Army Medical University, Chongqing, 400037 China ,grid.417298.10000 0004 1762 4928Chongqing Key Laboratory of Immunotherapy, Chongqing, 400037 China ,grid.411594.c0000 0004 1777 9452School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing, 400054 China
| | - Chongyi Li
- grid.410570.70000 0004 1760 6682Department of Ophthalmology, Daping Hospital, Army Medical University, Chongqing, 400042 China
| | - Shouxia Xu
- grid.410570.70000 0004 1760 6682Department of Oncology, Xinqiao Hospital, Army Medical University, Chongqing, 400037 China ,grid.417298.10000 0004 1762 4928Chongqing Key Laboratory of Immunotherapy, Chongqing, 400037 China
| | - Zheng Jin
- GloriousMed Clinical Laboratory Co., Ltd, Shanghai, People’s Republic of China
| | - Han Chu
- grid.410570.70000 0004 1760 6682Department of Oncology, Xinqiao Hospital, Army Medical University, Chongqing, 400037 China ,grid.13291.380000 0001 0807 1581Center of Growth, Metabolism and Aging, Key Laboratory of Bio-Resources and Eco-Environment, College of Life Sciences, Sichuan University, Chengdu, 610064 China
| | - Yisong Y. Wan
- grid.10698.360000000122483208Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 USA
| | - Bo Zhu
- grid.410570.70000 0004 1760 6682Department of Oncology, Xinqiao Hospital, Army Medical University, Chongqing, 400037 China ,grid.417298.10000 0004 1762 4928Chongqing Key Laboratory of Immunotherapy, Chongqing, 400037 China
| | - Yi Zhou
- grid.410570.70000 0004 1760 6682Department of Oncology, Xinqiao Hospital, Army Medical University, Chongqing, 400037 China ,grid.417298.10000 0004 1762 4928Chongqing Key Laboratory of Immunotherapy, Chongqing, 400037 China
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Mei-Lin Zhou, Ma JN, Xue L. Effect of Protein Arginine Methyltransferase 1 Gene Knockout on the Proliferation of Human Embryonic Kidney 293T Cells. BIOL BULL+ 2022. [DOI: 10.1134/s1062359022140163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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10
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Zheng J, Cai X, Zhang Y, Wang H, Liu L, Tang F, Liu L, Sun Y. A comprehensive pan-cancer analysis of necroptosis molecules in four gynecologic cancers. BMC Cancer 2022; 22:1160. [DOI: 10.1186/s12885-022-10166-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 10/04/2022] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
In recent years, it has been proved that necroptosis plays an important role in the occurrence, development, invasion, metastasis and drug resistance of malignant tumors. Hence, further evaluation and targeting of necroptosis may be of clinical benefit for gynecologic cancers (GCs).
Methods
To compare consistency and difference, we explored the expression pattern and prognostic value of necroptosis-related genes (NRGs) in pan-GC analysis through Linear regression and Empirical Bayesian, Univariate Cox analysis, and public databases from TCGA and Genotype-Tissue Expression (GTEx), including CESC, OV, UCEC, and UCS. We explored the copy number variation (CNV), methylation level and enrichment pathways of NRGs in the four GCs. Based on LASSO Cox regression analysis or principal component analysis, we established the prognostic NRG-signature or necroptosis-score for the four GCs. In addition, we predicted and compared functional pathways, tumor mutational burden (TMB), somatic mutation features, immunity status, immunotherapy, chemotherapeutic drug sensitivity of the NRG-signature based on NRGs. We also examined the expression level of several NRGs in OV samples that we collected using Quantitative Real-time PCR.
Results
We confirmed the presence of NRGs in expression, prognosis, CNV, and methylation for four GCs, thus comparing the consistency and difference among the four GCs. The prognosis and independent prognostic value of the risk signatures based on NRGs were determined. Through the results of subclass mapping, we found that GC patients with lower risk score may be more sensitive to PDL1 response and more sensitive to immune checkpoint blockade therapy. Drug susceptibility analysis showed that, 51, 45, 64, and 29 drugs with differences between risk groups were yielded in CESC, OV, UCEC, and UCS respectively. For OV, the expression differences of several NRGs in the tissues we collected were similar to that in TCGA.
Conclusion
Our comprehensive analysis of NRGs and NRG-signature demonstrated their similarity and difference, as well as their potential roles in prognosis and could guide therapeutic strategies, thus improving the outcome of GC patients.
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11
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Zhang C, Liu N. Ferroptosis, necroptosis, and pyroptosis in the occurrence and development of ovarian cancer. Front Immunol 2022; 13:920059. [PMID: 35958626 PMCID: PMC9361070 DOI: 10.3389/fimmu.2022.920059] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 06/27/2022] [Indexed: 12/13/2022] Open
Abstract
Ovarian cancer (OC) is one of the most common malignancies that causes death in women and is a heterogeneous disease with complex molecular and genetic changes. Because of the relatively high recurrence rate of OC, it is crucial to understand the associated mechanisms of drug resistance and to discover potential target for rational targeted therapy. Cell death is a genetically determined process. Active and orderly cell death is prevalent during the development of living organisms and plays a critical role in regulating life homeostasis. Ferroptosis, a novel type of cell death discovered in recent years, is distinct from apoptosis and necrosis and is mainly caused by the imbalance between the production and degradation of intracellular lipid reactive oxygen species triggered by increased iron content. Necroptosis is a regulated non-cysteine protease–dependent programmed cell necrosis, morphologically exhibiting the same features as necrosis and occurring via a unique mechanism of programmed cell death different from the apoptotic signaling pathway. Pyroptosis is a form of programmed cell death that is characterized by the formation of membrane pores and subsequent cell lysis as well as release of pro-inflammatory cell contents mediated by the abscisin family. Studies have shown that ferroptosis, necroptosis, and pyroptosis are involved in the development and progression of a variety of diseases, including tumors. In this review, we summarized the recent advances in ferroptosis, necroptosis, and pyroptosis in the occurrence, development, and therapeutic potential of OC.
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Chen J, Wei Z, Fu K, Duan Y, Zhang M, Li K, Guo T, Yin R. Non-apoptotic cell death in ovarian cancer: Treatment, resistance and prognosis. Biomed Pharmacother 2022; 150:112929. [PMID: 35429741 DOI: 10.1016/j.biopha.2022.112929] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 04/02/2022] [Accepted: 04/05/2022] [Indexed: 11/19/2022] Open
Abstract
Ovarian cancer is mostly diagnosed at an advanced stage due to the absence of effective screening methods and specific symptoms. Repeated chemotherapy resistance and recurrence before PARPi are used as maintenance therapies, lead to low survival rates and poor prognosis. Apoptotic cell death plays a crucial role in ovarian cancer, which is proved by current researches. With the ongoing development of targeted therapy, non-apoptotic cell death has shown substantial potential in tumor prevention and treatment, including autophagy, ferroptosis, necroptosis, immunogenic cell death, pyroptosis, alkaliptosis, and other modes of cell death. We systematically reviewed the research progress on the role of non-apoptotic cell death in the onset, development, and outcome of ovarian cancer. This review provides a more theoretical basis for exploring therapeutic targets, reversing drug resistance in refractory ovarian cancer, and establishing risk prediction models that help realize the clinical transformation of vital drugs.
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Affiliation(s)
- Jinghong Chen
- Department of Obstetrics and Gynaecology, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Zhichen Wei
- The Second Clinical Medical College, Lanzhou University, Lanzhou 730000, Gansu Province, China
| | - Kaiyu Fu
- Department of Obstetrics and Gynaecology, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Yuanqiong Duan
- Department of Obstetrics and Gynaecology, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Mengpei Zhang
- Department of Obstetrics and Gynaecology, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Kemin Li
- Department of Obstetrics and Gynaecology, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Tao Guo
- Department of Obstetrics and Gynaecology, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Rutie Yin
- Department of Obstetrics and Gynaecology, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China.
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13
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The non-apoptotic function of Caspase-8 in negatively regulating the CDK9-mediated Ser2 phosphorylation of RNA polymerase II in cervical cancer. Cell Mol Life Sci 2022; 79:597. [PMID: 36399280 PMCID: PMC9674771 DOI: 10.1007/s00018-022-04598-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 10/11/2022] [Accepted: 10/13/2022] [Indexed: 11/19/2022]
Abstract
Cervical cancer is the fourth most frequently diagnosed and fatal gynecological cancer. 15-61% of all cases metastasize and develop chemoresistance, reducing the 5-year survival of cervical cancer patients to as low as 17%. Therefore, unraveling the mechanisms contributing to metastasis is critical in developing better-targeted therapies against it. Here, we have identified a novel mechanism where nuclear Caspase-8 directly interacts with and inhibits the activity of CDK9, thereby modulating RNAPII-mediated global transcription, including those of cell-migration- and cell-invasion-associated genes. Crucially, low Caspase-8 expression in cervical cancer patients leads to poor prognosis, higher CDK9 phosphorylation at Thr186, and increased RNAPII activity in cervical cancer cell lines and patient biopsies. Caspase-8 knock-out cells were also more resistant to the small-molecule CDK9 inhibitor BAY1251152 in both 2D- and 3D-culture conditions. Combining BAY1251152 with Cisplatin synergistically overcame chemoresistance of Caspase-8-deficient cervical cancer cells. Therefore, Caspase-8 expression could be a marker in chemoresistant cervical tumors, suggesting CDK9 inhibitor treatment for their sensitization to Cisplatin-based chemotherapy.
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14
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Smac-mimetic enhances antitumor effect of standard chemotherapy in ovarian cancer models via Caspase 8-independent mechanism. Cell Death Discov 2021; 7:134. [PMID: 34088893 PMCID: PMC8178341 DOI: 10.1038/s41420-021-00511-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 05/05/2021] [Indexed: 02/03/2023] Open
Abstract
Ovarian cancer is the most lethal gynecological cancer in the US. Standard treatment consists of surgery followed by chemotherapies relying on apoptotic tumor cell death. Most women with advanced stage disease will relapse, suggesting that this disease is characterized by primary and acquired resistance to chemotherapy, and novel approaches to treatment are greatly needed. Low Caspase 8 expression levels in ovarian cancers correlate with resistance to apoptotic chemotherapy, and a subpopulation of patients with low Caspase 8 levels exhibit poorer overall survival after standard-of-care treatment. We hypothesized that low Caspase 8 function reduces the ability of cancer cells to undergo apoptosis when exposed to standard chemotherapy and that second mitochondria-derived activator of caspases (Smac)-mimetics could increase cell death in combination with chemotherapy. Here we show that combination treatment with a Smac-mimetic can target tumor cells with low Caspase 8 and induce necroptotic cell death. We investigated the in vitro effect of Smac-mimetic added to carboplatin and paclitaxel treatment of ovarian cancer cells expressing wild type and low Caspase 8 levels, which resulted in a 2–4-fold enhancement of cell death. Mice bearing subcutaneous or intraperitoneal ovarian xenografts showed greater aggressiveness of Caspase 8-deficient versus wild-type tumors; combined in vivo treatment with chemotherapy and Smac-mimetic resulted in >50% decrease in low Caspase 8 xenograft growth, as well as significantly enhanced overall survival, especially when given simultaneously with paclitaxel. Surprisingly, Smac-mimetic on the same day as carboplatin decreased mouse survival compared to when it was given on a sequential day of treatment. The antagonism was associated with a decrease in DNA damage markers, emphasizing the importance of optimizing timing of drug administration. Clinical validation of such approaches is needed to increase the effectiveness of current standard ovarian cancer treatment.
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15
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How Macrophages Become Transcriptionally Dysregulated: A Hidden Impact of Antitumor Therapy. Int J Mol Sci 2021; 22:ijms22052662. [PMID: 33800829 PMCID: PMC7961970 DOI: 10.3390/ijms22052662] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 02/26/2021] [Accepted: 03/01/2021] [Indexed: 12/12/2022] Open
Abstract
Tumor-associated macrophages (TAMs) are the essential components of the tumor microenvironment. TAMs originate from blood monocytes and undergo pro- or anti-inflammatory polarization during their life span within the tumor. The balance between macrophage functional populations and the efficacy of their antitumor activities rely on the transcription factors such as STAT1, NF-κB, IRF, and others. These molecular tools are of primary importance, as they contribute to the tumor adaptations and resistance to radio- and chemotherapy and can become important biomarkers for theranostics. Herein, we describe the major transcriptional mechanisms specific for TAM, as well as how radio- and chemotherapy can impact gene transcription and functionality of macrophages, and what are the consequences of the TAM-tumor cooperation.
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16
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Chen X, Cheng B, Dai D, Wu Y, Feng Z, Tong C, Wang X, Zhao J. Heparanase induces necroptosis of microvascular endothelial cells to promote the metastasis of hepatocellular carcinoma. Cell Death Discov 2021; 7:33. [PMID: 33597510 PMCID: PMC7889896 DOI: 10.1038/s41420-021-00411-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 09/17/2020] [Accepted: 10/05/2020] [Indexed: 12/20/2022] Open
Abstract
Heparanase (HPSE) is a kind of multifunctional extracellular hydrolase, and related to metastasis of hepatocellular carcinoma (HCC). Endothelial necroptosis promotes the metastasis of cancer cells. It is not clear whether HPSE could mediate necroptosis of microvascular endothelial cells (MVECs) to promote HCC metastasis. Here we found HPSE expression was up-regulated in HCC tissues and its over-expression was correlated with multiple tumor foci, microvascular invasion, and poor outcome of HCC patients. Non-contact co-culture experiments showed high-expressed HPSE in HCC cells mediated the necroptosis of human umbilical vein endothelial cells (HUVECs) and elevated the expression levels of syndecan-1 (SDC-1) and tumor necrosis factor-α (TNF-α) in vitro. As a result of necroptosis, trans-endothelial migration (TEM) of HCC cells was increased. Conversely, both HPSE and SDC-1 knockdowns reversed necroptosis and decreased TNF-α expression level, while HPSE over-expression increased SDC-1 and TNF-α expression and aggravated necroptosis. Animal experiments found that the nude mice, intraperitoneally injected with HPSE high expressing HCC cells, had obvious necroptosis of MVECs and high intrahepatic metastasis rate, which could be relieved by inhibitor of necroptosis. Morever, HPSE elevated the expression levels of p38 mitogen-activated protein kinase (p38 MAPK) rather than nuclear factor kappa B in vitro. Our data suggest that HPSE induces necroptosis of MVECs to promote the metastasis of HCC by activating HPSE/SDC-1/TNF-α axis and p38 MAPK pathway.
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Affiliation(s)
- Xiaopeng Chen
- First Department of Hepatobiliary Surgery, Affiliated Yijishan Hospital of Wannan Medical College, 241001, Wuhu, China.
| | - Bin Cheng
- First Department of Hepatobiliary Surgery, Affiliated Yijishan Hospital of Wannan Medical College, 241001, Wuhu, China.,Department of Hepatobiliary surgery, Huangshan People's Hospital, 245000, Huangshan, China
| | - Dafei Dai
- First Department of Hepatobiliary Surgery, Affiliated Yijishan Hospital of Wannan Medical College, 241001, Wuhu, China
| | - Yuhai Wu
- First Department of Hepatobiliary Surgery, Affiliated Yijishan Hospital of Wannan Medical College, 241001, Wuhu, China
| | - Zhiwen Feng
- First Department of Hepatobiliary Surgery, Affiliated Yijishan Hospital of Wannan Medical College, 241001, Wuhu, China
| | - Chaogang Tong
- Department of General Surgery, Affiliated Chaohu Hospital, Anhui Medical University, 238000, Hefei, China
| | - Xiangming Wang
- Department of Pathology, Affiliated Yijishan Hospital of Wannan Medical College, 241001, Wuhu, China
| | - Jun Zhao
- Department of Gastrointestinal Surgery, Affiliated Yijishan Hospital of Wannan Medical College, 241001, Wuhu, China
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17
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Zhirong Z, Qiaojian Z, Chunjing X, Shengchen W, Jiahe L, Zhaoyi L, Shu L. Methionine selenium antagonizes LPS-induced necroptosis in the chicken liver via the miR-155/TRAF3/MAPK axis. J Cell Physiol 2020; 236:4024-4035. [PMID: 33151563 DOI: 10.1002/jcp.30145] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 10/05/2020] [Accepted: 10/26/2020] [Indexed: 12/15/2022]
Abstract
Organic selenium has antioxidation and disease treatment effects. To explore the mechanisms of how methionine selenium alleviates necroptosis in the liver and whether this process is related to microRNA (miRNA) and the mitogen-activated protein kinase (MAPK) pathway, an animal model of methionine selenium and the lipopolysaccharide (LPS) interaction was established. The morphology, inflammatory factor (tumor necrosis factor-α [TNF-α]), necroptosis-related genes (RIP1, RIP3, MLKL, and caspase 8), MAPK pathway-related genes (JNK, ERK, and p38, p-JNK, p-ERK, and p-p38), gga-miR-155, TRAF3 (predicted target of gga-miR-155), and oxidative stress-related indicators (SOD, MDA, CAT, GSH, and GSH-Px) were analyzed from the perspective of the miR-155/TRAF3/MAPK axis to elucidate the mechanism of methionine selenium on the LPS-induced necroptosis mechanism in the chicken liver. The current results suggested that methionine selenium antagonizes oxidative stress, inflammation, and the MAPK pathway, thereby antagonizing the occurrence of necroptosis through multiple mechanisms. At the same time, methionine selenium affects miR-155/TRAF3/MAPK signaling, reduces miR-155 expression, and upregulates TRAF3 expression to inhibit necroptosis. This information provided new ideas and a theoretical basis for the practical application of methionine selenium, and it also enriched the study of miRNAs in birds and provided a reference for comparative medicine.
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Affiliation(s)
- Zhao Zhirong
- Department of Basic Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Zhang Qiaojian
- Department of Basic Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Xu Chunjing
- National Selenium-Rich Product Quality Supervision and Inspection Center, Enshi, People's Republic of China
| | - Wang Shengchen
- Department of Basic Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Li Jiahe
- Department of Basic Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Liu Zhaoyi
- Department of Basic Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Li Shu
- Department of Basic Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
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18
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The role of caspase-8 in the tumor microenvironment of ovarian cancer. Cancer Metastasis Rev 2020; 40:303-318. [PMID: 33026575 PMCID: PMC7897206 DOI: 10.1007/s10555-020-09935-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 09/23/2020] [Indexed: 12/17/2022]
Abstract
Caspase-8 is an aspartate-specific cysteine protease, which is best known for its apoptotic functions. Caspase-8 is placed at central nodes of multiple signal pathways, regulating not only the cell cycle but also the invasive and metastatic cell behavior, the immune cell homeostasis and cytokine production, which are the two major components of the tumor microenvironment (TME). Ovarian cancer often has dysregulated caspase-8 expression, leading to imbalance between its apoptotic and non-apoptotic functions within the tumor and the surrounding milieu. The downregulation of caspase-8 in ovarian cancer seems to be linked to high aggressiveness with chronic inflammation, immunoediting, and immune resistance. Caspase-8 plays therefore an essential role not only in the primary tumor cells but also in the TME by regulating the immune response, B and T lymphocyte activation, and macrophage differentiation and polarization. The switch between M1 and M2 macrophages is possibly associated with changes in the caspase-8 expression. In this review, we are discussing the non-apoptotic functions of caspase-8, highlighting this protein as a modulator of the immune response and the cytokine composition in the TME. Considering the low survival rate among ovarian cancer patients, it is urgently necessary to develop new therapeutic strategies to optimize the response to the standard treatment. The TME is highly heterogenous and provides a variety of opportunities for new drug targets. Given the variety of roles of caspase-8 in the TME, we should focus on this protein in the development of new therapeutic strategies against the TME of ovarian cancer.
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19
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Raden Y, Shlomovitz I, Gerlic M. Necroptotic extracellular vesicles - present and future. Semin Cell Dev Biol 2020; 109:106-113. [PMID: 32988742 DOI: 10.1016/j.semcdb.2020.08.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Accepted: 08/30/2020] [Indexed: 01/08/2023]
Abstract
Necroptosis is a receptor-interacting protein kinase 3 (RIPK3)-/mixed lineage kinase domain-like(MLKL)-dependent and caspase-independent form of cell death that promotes inflammation. We, and others, have recently shown that necroptotic cells release extracellular vesicles (EVs). This finding has highlighted that the impact of necroptosis extends well beyond its cell death function. In this review, we summarize the general characteristics, biogenesis, and function of EVs, as well as their role in cancer. In addition, we outline our current knowledge regarding necroptotic EVs, including their recently discovered and analyzed proteome. We examine the accumulating evidence for a role for necroptosis in anti-tumor immunity. Finally, we suggest that necroptotic EVs play an important role in the necroptosis-induced immune response and may, therefore, be exploited in cancer immunotherapy applications.
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Affiliation(s)
- Yael Raden
- Department of Clinical Microbiology and Immunology, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Inbar Shlomovitz
- Department of Clinical Microbiology and Immunology, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Motti Gerlic
- Department of Clinical Microbiology and Immunology, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel.
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20
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Yan XY, Qu XZ, Xu L, Yu SH, Tian R, Zhong XR, Sun LK, Su J. Insight into the role of p62 in the cisplatin resistant mechanisms of ovarian cancer. Cancer Cell Int 2020; 20:128. [PMID: 32322174 PMCID: PMC7164250 DOI: 10.1186/s12935-020-01196-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 03/28/2020] [Indexed: 02/06/2023] Open
Abstract
Cisplatin is a platinum-based first-line drug for treating ovarian cancer. However, chemotherapy tolerance has limited the efficacy of cisplatin for ovarian cancer patients. Research has demonstrated that cisplatin causes changes in cell survival and death signaling pathways through its interaction with macromolecules and organelles, which indicates that investigation into the DNA off-target effects of cisplatin may provide critical insights into the mechanisms underlying drug resistance. The multifunctional protein p62 works as a signaling hub in the regulation of pro-survival transcriptional factors NF-κB and Nrf2 and connects autophagy and apoptotic signals, which play important roles in maintaining cell homeostasis. In this review, we discuss the role of p62 in cisplatin resistance by exploring p62-associated signaling pathways based on current studies and our work. Insights into these resistance mechanisms may lead to more effective therapeutic strategies for ovarian cancer by targeting p62.
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Affiliation(s)
- Xiao-Yu Yan
- 1Department of Pathophysiology, Key Laboratory of Pathobiology, Ministry of Education, College of Basic Medical Sciences, Jilin University, 126 Xinmin Street, Changchun, 130021 China
| | - Xian-Zhi Qu
- 2Department of Hepatobiliary & Pancreatic Surgery, The Second Hospital of Jilin University, Jilin University, Changchun, 130021 Jilin China
| | - Long Xu
- 1Department of Pathophysiology, Key Laboratory of Pathobiology, Ministry of Education, College of Basic Medical Sciences, Jilin University, 126 Xinmin Street, Changchun, 130021 China
| | - Si-Hang Yu
- 1Department of Pathophysiology, Key Laboratory of Pathobiology, Ministry of Education, College of Basic Medical Sciences, Jilin University, 126 Xinmin Street, Changchun, 130021 China
| | - Rui Tian
- 1Department of Pathophysiology, Key Laboratory of Pathobiology, Ministry of Education, College of Basic Medical Sciences, Jilin University, 126 Xinmin Street, Changchun, 130021 China
| | - Xin-Ru Zhong
- 1Department of Pathophysiology, Key Laboratory of Pathobiology, Ministry of Education, College of Basic Medical Sciences, Jilin University, 126 Xinmin Street, Changchun, 130021 China
| | - Lian-Kun Sun
- 1Department of Pathophysiology, Key Laboratory of Pathobiology, Ministry of Education, College of Basic Medical Sciences, Jilin University, 126 Xinmin Street, Changchun, 130021 China
| | - Jing Su
- 1Department of Pathophysiology, Key Laboratory of Pathobiology, Ministry of Education, College of Basic Medical Sciences, Jilin University, 126 Xinmin Street, Changchun, 130021 China
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21
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Life, death, and autophagy in cancer: NF-κB turns up everywhere. Cell Death Dis 2020; 11:210. [PMID: 32231206 PMCID: PMC7105474 DOI: 10.1038/s41419-020-2399-y] [Citation(s) in RCA: 161] [Impact Index Per Article: 40.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 02/27/2020] [Accepted: 03/03/2020] [Indexed: 12/15/2022]
Abstract
Escaping programmed cell death is a hallmark of cancer. NF-κB transcription factors are key regulator of cell survival and aberrant NF-κB signaling has been involved in the pathogenesis of most human malignancies. Although NF-κB is best known for its antiapoptotic role, other processes regulating the life/death balance, such as autophagy and necroptosis, seem to network with NF-κB. This review discusses how the reciprocal regulation of NF-κB, autophagy and programmed cell death affect cancer development and progression.
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22
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Caspase-8: The double-edged sword. Biochim Biophys Acta Rev Cancer 2020; 1873:188357. [PMID: 32147543 DOI: 10.1016/j.bbcan.2020.188357] [Citation(s) in RCA: 87] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 02/13/2020] [Accepted: 03/03/2020] [Indexed: 12/17/2022]
Abstract
Caspase-8 is a cysteine - aspartate specific protease that classically triggers the extrinsic apoptotic pathway, in response to the activation of cell surface Death Receptors (DRs) like FAS, TRAIL-R and TNF-R. Besides it's roles in triggering death receptor-mediated apoptosis, Caspase-8 has also been implicated in the onsets of anoikis, autophagy and pyroptosis. Furthermore, Caspase-8 also plays a crucial pro-survival function by inhibiting an alternative form of programmed cell death called necroptosis. Low expression levels of pro-Caspase-8 is therefore associated with the malignant transformation of cancers. However, the long-held notion that pro-Caspase-8 expression/activity is generally lost in most cancers, thereby contributing to apoptotic escape and enhanced resistance to anti-cancer therapeutics, has been found to be true for only a minority of cancers types. In the majority of cases, pro-Caspase-8 expression is maintained and sometimes elevated, while it's apoptotic activity is regulated through different mechanisms. This supports the notion that the non-apoptotic functions of Caspase-8 offer growth advantage in these cancer types and have, therefore, gained renewed interest in the recent years. In light of these reasons, a number of therapeutic approaches have been employed, with the intent of targeting pro-Caspase-8 in cancer cells. In this review, we would attempt to discuss - the classic roles of Caspase-8 in initiating apoptosis; it's non-apoptotic functions; it's the clinical significance in different cancer types; and the therapeutic applications exploiting the ability of pro-Caspase-8 to regulate various cellular functions.
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23
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Goka ET, Chaturvedi P, Lopez DTM, Garza ADL, Lippman ME. RAC1b Overexpression Confers Resistance to Chemotherapy Treatment in Colorectal Cancer. Mol Cancer Ther 2019; 18:957-968. [PMID: 30926638 DOI: 10.1158/1535-7163.mct-18-0955] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 11/13/2018] [Accepted: 03/15/2019] [Indexed: 11/16/2022]
Abstract
Resistance to chemotherapy represents a major limitation in the treatment of colorectal cancer. Novel strategies to circumvent resistance are critical to prolonging patient survival. Rac1b, a constitutively activated isoform of the small GTPase Rac1, is upregulated with disease progression and promotes cell proliferation and inhibits apoptosis by activation of NF-κB signaling. Here, we show that Rac1b overexpression correlates with cancer stage and confirmed Rac1b expression is associated with increased growth through enhancing NF-κB activity. Rac1b knockdown reduced cellular proliferation and reduced NF-κB activity. Surprisingly, Rac1b expression and NF-κB activity were upregulated in cells treated with chemotherapeutics, suggesting that Rac1b facilitates chemo-resistance through activation of NF-κB signaling. Knockdown of Rac1b or Rac inhibition increases the sensitivity of the cells to oxaliplatin. When used in combination, inhibition of Rac prevents the increase in NF-κB activity associated with chemotherapy treatment and increases the sensitivity of the cells to oxaliplatin. Although Rac inhibition or oxaliplatin treatment alone reduces the growth of colorectal cancer in vivo, combination therapy results in improved outcomes compared with single agents alone. We provide the first evidence that Rac1b expression confers resistance to chemotherapy in colorectal cancer. Additionally, we show that the use of a Rac inhibitor prevents chemoresistance by blocking activation of chemotherapy induced NF-κB signaling, providing a novel strategy to overcome resistance to chemotherapy in colorectal cancer.
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Affiliation(s)
| | | | | | | | - Marc E Lippman
- Department of Oncology, Georgetown University, Washington, District of Columbia
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24
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Krysko O, Aaes TL, Kagan VE, D'Herde K, Bachert C, Leybaert L, Vandenabeele P, Krysko DV. Necroptotic cell death in anti-cancer therapy. Immunol Rev 2018; 280:207-219. [PMID: 29027225 DOI: 10.1111/imr.12583] [Citation(s) in RCA: 120] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Necroptosis is one the best-characterized forms of regulated necrosis. Necroptosis is mediated by the kinase activities of receptor interacting protein kinase-1 and receptor interacting protein kinase-3, which eventually lead to the activation of mixed lineage kinase domain-like. Necroptosis is characterized by rapid permeabilization of the plasma membrane, which is associated with the release of the cell content and subsequent exposure of damage-associated molecular patterns (DAMPs) and cytokines/chemokines. This release underlies the immunogenic nature of necroptotic cancer cells and their ability to induce efficient anti-tumor immunity. Triggering necroptosis has become especially important in experimental cancer treatments as an alternative to triggering apoptosis because one of the hallmarks of cancer is the blockade or evasion of apoptosis. In this review, we discuss recent advances in necroptosis research and the functional consequences of necroptotic cancer cell death, with focus on its immunogenicity and its role in the activation of anti-tumor immunity. Next, we discuss the molecular mechanisms of phosphatidylserine exposure during necroptosis and its role in the recognition of necroptotic cells. We also highlight the complex role of the necroptotic pathway in tumor promotion and suppression and in metastasis. Future studies will show whether necroptosis is truly a better strategy to overcome apoptosis resistance and provide the insights needed for development of novel treatment strategies for cancer.
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Affiliation(s)
- Olga Krysko
- Upper Airway Research Laboratory, Department of Oto-Rhino-Laryngology, Ghent University, Ghent, Belgium
| | - Tania Løve Aaes
- VIB-UGent Center for Inflammation Research (IRC), VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium.,Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Valerian E Kagan
- Center for Free Radical and Antioxidant Health, University of Pittsburgh, Pittsburgh, PA, USA.,Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Katharina D'Herde
- Department of Basic Medical Sciences, Ghent University, Ghent, Belgium
| | - Claus Bachert
- Upper Airway Research Laboratory, Department of Oto-Rhino-Laryngology, Ghent University, Ghent, Belgium
| | - Luc Leybaert
- Department of Basic Medical Sciences, Ghent University, Ghent, Belgium
| | - Peter Vandenabeele
- VIB-UGent Center for Inflammation Research (IRC), VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium.,Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Dmitri V Krysko
- Cancer Research Institute Ghent (CRIG), Ghent, Belgium.,Department of Basic Medical Sciences, Ghent University, Ghent, Belgium
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25
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Yao Q, Wang W, Jin J, Min K, Yang J, Zhong Y, Xu C, Deng J, Zhou Y. Synergistic role of Caspase-8 and Caspase-3 expressions: Prognostic and predictive biomarkers in colorectal cancer. Cancer Biomark 2018; 21:899-908. [PMID: 29355114 DOI: 10.3233/cbm-170967] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Qiang Yao
- Department of Oncology, Yixing Hospital Affiliated to Medical College of Yangzhou University, Yixing, Jiangsu, China
- Department of Oncology, The Second Affiliated Hospital of Soochow University, Soochow, Jiangsu, China
- Department of Oncology, Yixing Hospital Affiliated to Medical College of Yangzhou University, Yixing, Jiangsu, China
| | - Weimin Wang
- Department of Oncology, Yixing Hospital Affiliated to Medical College of Yangzhou University, Yixing, Jiangsu, China
- Institute of Combining Chinese Traditional and Western Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu, China
- Department of Oncology, Yixing Hospital Affiliated to Medical College of Yangzhou University, Yixing, Jiangsu, China
| | - Jun Jin
- Department of Oncology, Yixing Hospital Affiliated to Medical College of Yangzhou University, Yixing, Jiangsu, China
- Department of Oncology, Yixing Hospital Affiliated to Medical College of Yangzhou University, Yixing, Jiangsu, China
| | - Ke Min
- Department of Oncology, Yixing Hospital Affiliated to Medical College of Yangzhou University, Yixing, Jiangsu, China
| | - Jian Yang
- Department of Oncology, Yixing Hospital Affiliated to Medical College of Yangzhou University, Yixing, Jiangsu, China
| | - Yubing Zhong
- Department of General Surgery, Yixing Hospital Affiliated to Medical College of Yangzhou University, Yixing, Jiangsu, China
| | - Chunni Xu
- Department of Oncology, Yixing Hospital Affiliated to Medical College of Yangzhou University, Yixing, Jiangsu, China
| | - Jianliang Deng
- Department of Oncology, Yixing Hospital Affiliated to Medical College of Yangzhou University, Yixing, Jiangsu, China
| | - Yan Zhou
- Department of Oncology, Yixing Hospital Affiliated to Medical College of Yangzhou University, Yixing, Jiangsu, China
- Institute of Combining Chinese Traditional and Western Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu, China
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Li BX, Wang HB, Qiu MZ, Luo QY, Yi HJ, Yan XL, Pan WT, Yuan LP, Zhang YX, Xu JH, Zhang L, Yang DJ. Novel smac mimetic APG-1387 elicits ovarian cancer cell killing through TNF-alpha, Ripoptosome and autophagy mediated cell death pathway. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2018. [PMID: 29530056 PMCID: PMC5848599 DOI: 10.1186/s13046-018-0703-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background Ovarian cancer is a deadly disease. Inhibitors of apoptosis proteins (IAPs) are key regulators of apoptosis and are frequently dysregulated in ovarian cancer. Overexpression of IAPs proteins has been correlated with tumorigenesis, treatment resistance and poor prognosis. Reinstalling functional cell death machinery by pharmacological inhibition of IAPs proteins may represent an attractive therapeutic strategy for treatment of ovarian cancer. Methods CCK-8 and colony formation assay was performed to examine cytotoxic activity. Apoptosis was analyzed by fluorescence microscopy, flow cytometry and TUNEL assay. Elisa assay was used to determine TNFα protein. Caspase activity assay was used for caspase activation evaluation. Immunoprecipitation and siRNA interference were carried out for functional analysis. Western blotting analysis were carried out to test protein expression. Ovarian cancer cell xenograft nude mice model was used for in vivo efficacy evaluation. Results APG-1387 demonstrated potent inhibitory effect on ovarian cancer cell growth and clonogenic cell survival. APG-1387 induced RIP1- and TNFα-dependent apoptotic cell death in ovarian cancer through downregulation of IAPs proteins and induction of caspase-8/FADD/RIP1 complex, which drives caspase-8 activation. NF-κB signaling pathway was activated upon APG-1387 treatment and RIP1 contributed to NF-κB activation. APG-1387 induced cytoprotective autophagy while triggering apoptosis in ovarian cancer cells and inhibition of autophagy enhanced APG-1387-induced apoptotic cell death. APG-1387 exhibited potent antitumor activity against established human ovarian cancer xenografts. Conclusions Our results demonstrate that APG-1387 targets IAPs proteins to potently elicit apoptotic cell death in vitro and in vivo, and provide mechanistic and applicable rationale for future clinical evaluation of APG-1387 in ovarian cancer.
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Affiliation(s)
- Bao-Xia Li
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Heng-Bang Wang
- Department of Pharmacology, Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, School of Pharmacy, Fujian Medical University, Fuzhou, 350108, China.,Ascentage Pharma Group Corp., Ltd., Taizhou, 225309, China
| | - Miao-Zhen Qiu
- Department of Medical Oncology, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University Cancer Center, Guangzhou, 510060, China
| | - Qiu-Yun Luo
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Han-Jie Yi
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Xiang-Lei Yan
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Wen-Tao Pan
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Lu-Ping Yuan
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Yu-Xin Zhang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Jian-Hua Xu
- Department of Pharmacology, Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, School of Pharmacy, Fujian Medical University, Fuzhou, 350108, China.
| | - Lin Zhang
- Departments of Clinical Laboratory, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University Cancer Center, 651 Dongfeng Road East, Guangzhou, 510060, China.
| | - Da-Jun Yang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China. .,Ascentage Pharma Group Corp., Ltd., Taizhou, 225309, China.
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Kang TS, Wang W, Zhong HJ, Dong ZZ, Huang Q, Mok SWF, Leung CH, Wong VKW, Ma DL. An anti-prostate cancer benzofuran-conjugated iridium(III) complex as a dual inhibitor of STAT3 and NF-κB. Cancer Lett 2017; 396:76-84. [DOI: 10.1016/j.canlet.2017.03.016] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 03/08/2017] [Accepted: 03/09/2017] [Indexed: 01/28/2023]
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Elechalawar CK, Sridharan K, Pal A, Ahmed MT, Yousuf M, Adhikari SS, Banerjee R. Cationic folate-mediated liposomal delivery of bis-arylidene oxindole induces efficient melanoma tumor regression. Biomater Sci 2017; 5:1898-1909. [DOI: 10.1039/c7bm00405b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The folate receptor (FR) is a well-validated and common target for cancer due to its high over-expression in many different cancer cells.
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Affiliation(s)
- Chandra Kumar Elechalawar
- Chemical Biology Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Kathyayani Sridharan
- Chemical Biology Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Abhishek Pal
- Department of Chemistry
- University of Calcutta
- Kolkata 700 009
- India
| | - Mohammed Tanveer Ahmed
- Chemical Biology Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Mohammed Yousuf
- Department of Chemistry
- University of Calcutta
- Kolkata 700 009
- India
| | | | - Rajkumar Banerjee
- Chemical Biology Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
- Academy of Scientific and Innovative Research (AcSIR)
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Kim MK, Caplen N, Chakka S, Hernandez L, House C, Pongas G, Jordan E, Annunziata CM. Identification of therapeutic targets applicable to clinical strategies in ovarian cancer. BMC Cancer 2016; 16:678. [PMID: 27558154 PMCID: PMC4997769 DOI: 10.1186/s12885-016-2675-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 08/04/2016] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND shRNA-mediated lethality screening is a useful tool to identify essential targets in cancer biology. Ovarian cancer (OC) is extremely heterogeneous and most cases are advanced stages at diagnosis. OC has a high response rate initially, but becomes resistant to standard chemotherapy. We previously employed high throughput global shRNA sensitization screens to identify NF-kB related pathways. Here, we re-analyzed our previous shRNA screens in an unbiased manner to identify clinically applicable molecular targets. METHODS We proceeded with siRNA lethality screening using the top 55 genes in an expanded set of 6 OC cell lines. We investigated clinical relevance of candidate targets in The Cancer Genome Atlas OC dataset. To move these findings towards the clinic, we chose four pharmacological inhibitors to recapitulate the top siRNA effects: Oxozeaenol (for MAP3K7/TAK1), BI6727 (PLK1), MK1775 (WEE1), and Lapatinib (ERBB2). Cytotoxic effects were measured by cellular viability assay, as single agents and in 2-way combinations. Co-treatments were evaluated in either sequential or simultaneous exposure to drug for short term and extended periods to simulate different treatment strategies. RESULTS Loss-of-function shRNA screens followed by short-term siRNA validation screens identified therapeutic targets in OC cells. Candidate genes were dysregulated in a subset of TCGA OCs although the alterations of these genes showed no statistical significance to overall survival. Pharmacological inhibitors such as Oxozeaenol, BI6727, and MK1775 showed cytotoxic effects in OC cells regardless of cisplatin responsiveness, while all OC cells tested were cytostatic to Lapatinib. Co-treatment with BI6727 and MK1775 at sub-lethal concentrations was equally potent to BI6727 alone at lethal concentrations without cellular re-growth after the drugs were washed off, suggesting the co-inhibition at reduced dosages may be more efficacious than maximal single-agent cytotoxic concentrations. CONCLUSIONS Loss-of-function screen followed by in vitro target validation using chemical inhibitors identified clinically relevant targets. This approach has the potential to systematically refine therapeutic strategies in OC. These molecular target-driven strategies may provide additional therapeutic options for women whose tumors have become refractory to standard chemotherapy.
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Affiliation(s)
- Marianne K Kim
- Women's Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Natasha Caplen
- Gene Silencing Section, Genetics Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Sirisha Chakka
- Gene Silencing Section, Genetics Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Lidia Hernandez
- Women's Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Carrie House
- Women's Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Georgios Pongas
- Women's Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Elizabeth Jordan
- Women's Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Christina M Annunziata
- Women's Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA. .,Women's Malignancies Branch, Center for Cancer Research, National Cancer Institute, 10 Center Drive, Room 4B54, Bethesda, MD, 20892-1361, USA.
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