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de Melo Silva AJ, de Melo Gama JE, de Oliveira SA. The Role of Bcl-2 Family Proteins and Sorafenib Resistance in Hepatocellular Carcinoma. Int J Cell Biol 2024; 2024:4972523. [PMID: 39188653 PMCID: PMC11347034 DOI: 10.1155/2024/4972523] [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: 04/13/2024] [Revised: 07/10/2024] [Accepted: 08/02/2024] [Indexed: 08/28/2024] Open
Abstract
Liver cancer has been reported to be one of the most malignant diseases in the world. It is late diagnosis consequently leads to a difficult treatment, as the cancer reached an advanced stage. Hepatocellular carcinoma (HCC) is the primary type of cancer diagnosed in the liver, with deadly characteristics and a poor prognosis. The first-in-line treatment for advanced HCC is sorafenib. Sorafenib acts by inhibiting cell proliferation and by inducing apoptosis as well as blocks receptors associated with these mechanisms. Due to its constant use, sorafenib resistance has been described, especially to proteins of the Bcl-2 family, and their overexpression of Bcl-XL and Mcl-1. This review focuses on the role of the Bcl-2 proteins in relation to sorafenib resistance as a consequence of first-in-line treatment in HCC.
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2
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Iksen, Witayateeraporn W, Hardianti B, Pongrakhananon V. Comprehensive review of Bcl-2 family proteins in cancer apoptosis: Therapeutic strategies and promising updates of natural bioactive compounds and small molecules. Phytother Res 2024; 38:2249-2275. [PMID: 38415799 DOI: 10.1002/ptr.8157] [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: 10/31/2023] [Revised: 01/04/2024] [Accepted: 01/29/2024] [Indexed: 02/29/2024]
Abstract
Cancer has a considerably higher fatality rate than other diseases globally and is one of the most lethal and profoundly disruptive ailments. The increasing incidence of cancer among humans is one of the greatest challenges in the field of healthcare. A significant factor in the initiation and progression of tumorigenesis is the dysregulation of physiological processes governing cell death, which results in the survival of cancerous cells. B-cell lymphoma 2 (Bcl-2) family members play important roles in several cancer-related processes. Drug research and development have identified various promising natural compounds that demonstrate potent anticancer effects by specifically targeting Bcl-2 family proteins and their associated signaling pathways. This comprehensive review highlights the substantial roles of Bcl-2 family proteins in regulating apoptosis, including the intricate signaling pathways governing the activity of these proteins, the impact of reactive oxygen species, and the crucial involvement of proteasome degradation and the stress response. Furthermore, this review discusses advances in the exploration and potential therapeutic applications of natural compounds and small molecules targeting Bcl-2 family proteins and thus provides substantial scientific information and therapeutic strategies for cancer management.
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Affiliation(s)
- Iksen
- Department of Pharmacology and Physiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
- Department of Pharmacy, Sekolah Tinggi Ilmu Kesehatan Senior Medan, Medan, Indonesia
| | - Wasita Witayateeraporn
- Department of Pharmacology and Physiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Besse Hardianti
- Laboratory of Pharmacology and Clinical Pharmacy, Faculty of Health Sciences, Almarisah Madani University, South Sulawesi, Indonesia
| | - Varisa Pongrakhananon
- Department of Pharmacology and Physiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
- Preclinical Toxicity and Efficacy Assessment of Medicines and Chemicals Research Unit, Chulalongkorn University, Bangkok, Thailand
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3
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Tam TDT, Ngoc TTB, Nga NTH, Trinh NTM, Thuoc TL, Thao DTP. Ethyl acetate extract of Elephantopus mollis Kunth induces apoptosis in human gastric cancer cells. BMC Complement Med Ther 2021; 21:273. [PMID: 34717604 PMCID: PMC8557499 DOI: 10.1186/s12906-021-03444-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 10/15/2021] [Indexed: 11/10/2022] Open
Abstract
Background Gastric cancer is one of the most leading causes of cancer death worldwide. Therefore, treatment studies have been being conducted, one of which is screening of novel agents from medicinal herbs. Elephantopus mollis Kunth (EM) belonging to Asteraceae family is a perennial herb with several therapeutic properties including anticancer activity. However, the effect of this species on gastric cancer has not been reported yet. In this study, cytotoxicity of different EM crude extracts was investigated on AGS gastric cancer cell line. Besides, the effects of extract on nuclear morphology, caspase-3 activation, and gene expression were also explored. Results The results showed that ethyl acetate extract exhibited a remarkably inhibitory ability (IC50 = 27.5 μg/ml) on the growth of AGS cells, while causing less toxicity to normal human fibroblasts. The extract also induced apoptotic deaths in AGS cells as evidenced by cell shrinkage, formation of apoptotic bodies, nuclear fragmentation, caspase-3 activation, and the upregulation of BAK and APAF-1 pro-apoptotic genes related to mitochondrial signaling pathway. Specifically, BAK and APAF-1 mRNA expression levels showed 2.57 and 2.71-fold increases respectively. Conclusions The current study not only proved the anti-gastric cancer activity of EM ethyl acetate extract but also proposed its molecular mechanism. The extract could be a potential candidate for further investigation.
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Affiliation(s)
- Tran Dang Thanh Tam
- Department of Molecular and Environmental Biotechnology, Faculty of Biology and Biotechnology, VNU-HCM, University of Science, 227 Nguyen Van Cu, Ho Chi Minh City, 700000, Vietnam
| | - Truong Thi Bich Ngoc
- Department of Molecular and Environmental Biotechnology, Faculty of Biology and Biotechnology, VNU-HCM, University of Science, 227 Nguyen Van Cu, Ho Chi Minh City, 700000, Vietnam.,Laboratory of Molecular Biotechnology, VNU-HCM, University of Science, 227 Nguyen Van Cu, Ho Chi Minh City, 700000, Vietnam.,Laboratory of Cancer Research, VNU-HCM, University of Science, Duong so 4, Linh Trung, Thu Duc, Ho Chi Minh City, 700000, Vietnam
| | - Nguyen Thi Hoai Nga
- Department of Molecular and Environmental Biotechnology, Faculty of Biology and Biotechnology, VNU-HCM, University of Science, 227 Nguyen Van Cu, Ho Chi Minh City, 700000, Vietnam.,Laboratory of Molecular Biotechnology, VNU-HCM, University of Science, 227 Nguyen Van Cu, Ho Chi Minh City, 700000, Vietnam.,Vietnam National University, Ho Chi Minh City, Vo Truong Toan, Linh Trung, Thu Duc, Ho Chi Minh City, 700000, Vietnam
| | - Nguyen Thi My Trinh
- Department of Molecular and Environmental Biotechnology, Faculty of Biology and Biotechnology, VNU-HCM, University of Science, 227 Nguyen Van Cu, Ho Chi Minh City, 700000, Vietnam.,Laboratory of Molecular Biotechnology, VNU-HCM, University of Science, 227 Nguyen Van Cu, Ho Chi Minh City, 700000, Vietnam.,Laboratory of Cancer Research, VNU-HCM, University of Science, Duong so 4, Linh Trung, Thu Duc, Ho Chi Minh City, 700000, Vietnam
| | - Tran Linh Thuoc
- Department of Molecular and Environmental Biotechnology, Faculty of Biology and Biotechnology, VNU-HCM, University of Science, 227 Nguyen Van Cu, Ho Chi Minh City, 700000, Vietnam.,Laboratory of Molecular Biotechnology, VNU-HCM, University of Science, 227 Nguyen Van Cu, Ho Chi Minh City, 700000, Vietnam.,Laboratory of Cancer Research, VNU-HCM, University of Science, Duong so 4, Linh Trung, Thu Duc, Ho Chi Minh City, 700000, Vietnam.,Vietnam National University, Ho Chi Minh City, Vo Truong Toan, Linh Trung, Thu Duc, Ho Chi Minh City, 700000, Vietnam
| | - Dang Thi Phuong Thao
- Department of Molecular and Environmental Biotechnology, Faculty of Biology and Biotechnology, VNU-HCM, University of Science, 227 Nguyen Van Cu, Ho Chi Minh City, 700000, Vietnam. .,Laboratory of Molecular Biotechnology, VNU-HCM, University of Science, 227 Nguyen Van Cu, Ho Chi Minh City, 700000, Vietnam. .,Laboratory of Cancer Research, VNU-HCM, University of Science, Duong so 4, Linh Trung, Thu Duc, Ho Chi Minh City, 700000, Vietnam. .,Vietnam National University, Ho Chi Minh City, Vo Truong Toan, Linh Trung, Thu Duc, Ho Chi Minh City, 700000, Vietnam.
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4
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Saghaleyni R, Sheikh Muhammad A, Bangalore P, Nielsen J, Robinson JL. Machine learning-based investigation of the cancer protein secretory pathway. PLoS Comput Biol 2021; 17:e1008898. [PMID: 33819271 PMCID: PMC8049480 DOI: 10.1371/journal.pcbi.1008898] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 04/15/2021] [Accepted: 03/22/2021] [Indexed: 12/13/2022] Open
Abstract
Deregulation of the protein secretory pathway (PSP) is linked to many hallmarks of cancer, such as promoting tissue invasion and modulating cell-cell signaling. The collection of secreted proteins processed by the PSP, known as the secretome, is often studied due to its potential as a reservoir of tumor biomarkers. However, there has been less focus on the protein components of the secretory machinery itself. We therefore investigated the expression changes in secretory pathway components across many different cancer types. Specifically, we implemented a dual approach involving differential expression analysis and machine learning to identify PSP genes whose expression was associated with key tumor characteristics: mutation of p53, cancer status, and tumor stage. Eight different machine learning algorithms were included in the analysis to enable comparison between methods and to focus on signals that were robust to algorithm type. The machine learning approach was validated by identifying PSP genes known to be regulated by p53, and even outperformed the differential expression analysis approach. Among the different analysis methods and cancer types, the kinesin family members KIF20A and KIF23 were consistently among the top genes associated with malignant transformation or tumor stage. However, unlike most cancer types which exhibited elevated KIF20A expression that remained relatively constant across tumor stages, renal carcinomas displayed a more gradual increase that continued with increasing disease severity. Collectively, our study demonstrates the complementary nature of a combined differential expression and machine learning approach for analyzing gene expression data, and highlights key PSP components relevant to features of tumor pathophysiology that may constitute potential therapeutic targets. The secretory pathway is a series of intracellular compartments and enzymes that process and export proteins from the cell to its surrounding environment. Dysfunction of the secretory pathway is associated with many diseases, including cancer, and therefore constitutes a potential target for novel therapeutic strategies. The large number of interacting components that comprise the secretory pathway pose a challenge when attempting to identify where the dysfunction originates or how to restore healthy function. To improve our understanding of how the secretory pathway is changed within tumors, we used gene expression data from normal tissue and tumor samples from thousands of individuals which included many different types of cancers. The data was analyzed using different machine learning algorithms which we trained to predict sample characteristics, such as disease severity. This training quantified the relative degree to which each gene was associated with the tumor characteristic, allowing us to predict which secretory pathway components were important for processes such as tumor progression—both within specific cancer types and across many different cancer types. The machine learning-based approach demonstrated excellent performance compared to traditional gene expression analysis methods and identified several secretory pathway components with strong evidence of involvement in tumor development.
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Affiliation(s)
- Rasool Saghaleyni
- Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Azam Sheikh Muhammad
- Department of Computer Science and Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | | | - Jens Nielsen
- Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
- Wallenberg Center for Protein Research, Chalmers University of Technology, Gothenburg, Sweden
- BioInnovation Institute, Copenhagen, Denmark
| | - Jonathan L. Robinson
- Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
- Wallenberg Center for Protein Research, Chalmers University of Technology, Gothenburg, Sweden
- Department of Biology and Biological Engineering, National Bioinformatics Infrastructure Sweden, Science for Life Laboratory, Chalmers University of Technology, Gothenburg, Sweden
- * E-mail:
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5
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Najjar RS, Turner CG, Wong BJ, Feresin RG. Berry-Derived Polyphenols in Cardiovascular Pathologies: Mechanisms of Disease and the Role of Diet and Sex. Nutrients 2021; 13:nu13020387. [PMID: 33513742 PMCID: PMC7911141 DOI: 10.3390/nu13020387] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 01/21/2021] [Accepted: 01/22/2021] [Indexed: 02/06/2023] Open
Abstract
Cardiovascular disease (CVD) prevalence, pathogenesis, and manifestation is differentially influenced by biological sex. Berry polyphenols target several signaling pathways pertinent to CVD development, including inflammation, oxidative stress, and cardiac and vascular remodeling, and there are innate differences in these pathways that also vary by sex. There is limited research systematically investigating sex differences in berry polyphenol effects on these pathways, but there are fundamental findings at this time that suggest a sex-specific effect. This review will detail mechanisms within these pathological pathways, how they differ by sex, and how they may be individually targeted by berry polyphenols in a sex-specific manner. Because of the substantial polyphenolic profile of berries, berry consumption represents a promising interventional tool in the treatment and prevention of CVD in both sexes, but the mechanisms in which they function within each sex may vary.
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Affiliation(s)
- Rami S. Najjar
- Department of Nutrition, Georgia State University, Atlanta, GA 30302, USA;
| | - Casey G. Turner
- Department of Kinesiology and Health, Georgia State University, Atlanta, GA 30302, USA; (C.G.T.); (B.J.W.)
| | - Brett J. Wong
- Department of Kinesiology and Health, Georgia State University, Atlanta, GA 30302, USA; (C.G.T.); (B.J.W.)
| | - Rafaela G. Feresin
- Department of Nutrition, Georgia State University, Atlanta, GA 30302, USA;
- Correspondence:
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6
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Duan N, Zhang W, Li Z, Sun L, Song T, Yu Z, Chen X, Ma W. Overexpression of HIPK2 removes the transrepression of proapoptotic genes mediated by the CtBP1-p300-FOXO3a complex and increases the chemosensitivity in osteosarcoma cells. J Cancer 2021; 12:1826-1837. [PMID: 33613771 PMCID: PMC7890331 DOI: 10.7150/jca.52115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 12/16/2020] [Indexed: 12/22/2022] Open
Abstract
Decreased expression of proapoptotic genes can lead to the chemoresistenance in cancer therapy. Carboxyl-terminal binding protein 1 (CtBP1), a transcriptional corepressor with multiple oncogenic effects, has been previously identified to suppress the expression of two proapoptotic genes [BAX (BCL2 associated X) and BIM (Bcl-2 interacting mediator of cell death)] by assembling a complex with the Forkhead box O3 (FOXO3a) transcription factor and the p300 histone acetyltransferase. However, the upstream regulatory signaling of the CtBP1-p300-FOXO3a complex is obscure, and the effects of changing this signaling on chemosensitivity in osteosarcoma are unknown. Herein, we discovered that the downregulation of HIPK2 (Homeodomain-interacting protein kinase 2) was essential for the function of the CtBP1-p300-FOXO3a complex. Downregulation of HIPK2 prevented the phosphorylation and subsequent degradation of CtBP1, thereby allowing the assembly of the CtBP1-p300-FOXO3a complex and suppression of the expression of proapoptotic genes, such as BAX, BIM, BIK (Bcl-2 interacting killer) and NOXA/PMAIP1 (Phorbol-12-myristate-13-acetate-induced protein 1). Overexpression of HIPK2 promoted the phosphorylation of CtBP1 and the degradation of CtBP1 by proteasomes, thereby preventing the formation of the CtBP1-p300-FOXO3a complex. The abolition of CtBP1 transrepression increased the expression of proapoptotic genes to induce apoptosis and increase chemosensitivity in osteosarcoma cells. Taken together, our in vitro and in vivo results revealed that overexpression of HIPK2 could remove the CtBP1-mediated transrepression of proapoptotic genes, indicating a new therapeutic option for the treatment of osteosarcoma.
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Affiliation(s)
- Ning Duan
- Department of Orthopedics, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, China.,Department of Orthopedic Surgery, Honghui Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054, China
| | - Wentao Zhang
- Department of Orthopedic Surgery, Honghui Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054, China
| | - Zhong Li
- Department of Orthopedic Surgery, Honghui Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054, China
| | - Liang Sun
- Department of Orthopedic Surgery, Honghui Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054, China
| | - Tao Song
- Department of Orthopedic Surgery, Honghui Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054, China
| | - Zirui Yu
- Department of Orthopedic Surgery, Honghui Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054, China
| | - Xun Chen
- Department of Orthopedic Surgery, Honghui Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054, China
| | - Wei Ma
- Department of Orthopedics, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, China
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7
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Makarevich O, Sabirzhanov B, Aubrecht TG, Glaser EP, Polster BM, Henry RJ, Faden AI, Stoica BA. Mithramycin selectively attenuates DNA-damage-induced neuronal cell death. Cell Death Dis 2020; 11:587. [PMID: 32719328 PMCID: PMC7385624 DOI: 10.1038/s41419-020-02774-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 07/06/2020] [Accepted: 07/10/2020] [Indexed: 12/15/2022]
Abstract
DNA damage triggers cell death mechanisms contributing to neuronal loss and cognitive decline in neurological disorders, including traumatic brain injury (TBI), and as a side effect of chemotherapy. Mithramycin, which competitively targets chromatin-binding sites of specificity protein 1 (Sp1), was used to examine previously unexplored neuronal cell death regulatory mechanisms via rat primary neurons in vitro and after TBI in mice (males). In primary neurons exposed to DNA-damage-inducing chemotherapy drugs in vitro we showed that DNA breaks sequentially initiate DNA-damage responses, including phosphorylation of ATM, H2AX and tumor protein 53 (p53), transcriptional activation of pro-apoptotic BH3-only proteins, and mitochondrial outer membrane permeabilization (MOMP), activating caspase-dependent and caspase-independent intrinsic apoptosis. Mithramycin was highly neuroprotective in DNA-damage-dependent neuronal cell death, inhibiting chemotherapeutic-induced cell death cascades downstream of ATM and p53 phosphorylation/activation but upstream of p53-induced expression of pro-apoptotic molecules. Mithramycin reduced neuronal upregulation of BH3-only proteins and mitochondrial dysfunction, attenuated caspase-3/7 activation and caspase substrates' cleavage, and limited c-Jun activation. Chromatin immunoprecipitation indicated that mithramycin attenuates Sp1 binding to pro-apoptotic gene promoters without altering p53 binding suggesting it acts by removing cofactors required for p53 transactivation. In contrast, the DNA-damage-independent neuronal death models displayed caspase initiation in the absence of p53/BH3 activation and were not protected even when mithramycin reduced caspase activation. Interestingly, experimental TBI triggers a multiplicity of neuronal death mechanisms. Although markers of DNA-damage/p53-dependent intrinsic apoptosis are detected acutely in the injured cortex and are attenuated by mithramycin, these processes may play a reduced role in early neuronal death after TBI, as caspase-dependent mechanisms are repressed in mature neurons while other, mithramycin-resistant mechanisms are active. Our data suggest that Sp1 is required for p53-mediated transactivation of neuronal pro-apoptotic molecules and that mithramycin may attenuate neuronal cell death in conditions predominantly involving DNA-damage-induced p53-dependent intrinsic apoptosis.
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Affiliation(s)
- Oleg Makarevich
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Boris Sabirzhanov
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Taryn G Aubrecht
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Ethan P Glaser
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Brian M Polster
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Rebecca J Henry
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Alan I Faden
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Bogdan A Stoica
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD, 21201, USA.
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Weyer-Czernilofsky U, Hofmann MH, Friedbichler K, Baumgartinger R, Adam PJ, Solca F, Kraut N, Nguyen HM, Corey E, Liu G, Sprenger CC, Plymate SR, Bogenrieder T. Antitumor Activity of the IGF-1/IGF-2-Neutralizing Antibody Xentuzumab (BI 836845) in Combination with Enzalutamide in Prostate Cancer Models. Mol Cancer Ther 2020; 19:1059-1069. [PMID: 32054790 PMCID: PMC10823795 DOI: 10.1158/1535-7163.mct-19-0378] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 11/15/2019] [Accepted: 02/04/2020] [Indexed: 12/24/2022]
Abstract
Androgen deprivation therapy and second-generation androgen receptor signaling inhibitors such as enzalutamide are standard treatments for advanced/metastatic prostate cancer. Unfortunately, most men develop resistance and relapse; signaling via insulin-like growth factor (IGF) has been implicated in castration-resistant prostate cancer. We evaluated the antitumor activity of xentuzumab (IGF ligand-neutralizing antibody), alone and in combination with enzalutamide, in prostate cancer cell lines (VCaP, DuCaP, MDA PCa 2b, LNCaP, and PC-3) using established in vitro assays, and in vivo, using LuCaP 96CR, a prostate cancer patient-derived xenograft (PDX) model. Xentuzumab + enzalutamide reduced the viability of phosphatase and tensin homolog (PTEN)-expressing VCaP, DuCaP, and MDA PCa 2b cells more than either single agent, and increased antiproliferative activity and apoptosis induction in VCaP. Xentuzumab or xentuzumab + enzalutamide inhibited IGF type 1 receptor and AKT serine/threonine kinase (AKT) phosphorylation in VCaP, DuCaP, and MDA PCa 2b cells; xentuzumab had no effect on AKT phosphorylation and proliferation in PTEN-null LNCaP or PC-3 cells. Knockdown of PTEN led to loss of antiproliferative activity of xentuzumab and reduced activity of xentuzumab + enzalutamide in VCaP cells. Xentuzumab + enzalutamide inhibited the growth of castration-resistant LuCaP 96CR PDX with acquired resistance to enzalutamide, and improved survival in vivo The data suggest that xentuzumab + enzalutamide combination therapy may overcome castration resistance and could be effective in patients who are resistant to enzalutamide alone. PTEN status as a biomarker of responsiveness to combination therapy needs further investigation.
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Affiliation(s)
| | | | | | | | - Paul J Adam
- Boehringer Ingelheim RCV GmbH & Co. KG, Vienna, Austria
| | - Flavio Solca
- Boehringer Ingelheim RCV GmbH & Co. KG, Vienna, Austria
| | - Norbert Kraut
- Boehringer Ingelheim RCV GmbH & Co. KG, Vienna, Austria
| | - Holly M Nguyen
- Department of Urology, University of Washington, Seattle, Washington
| | - Eva Corey
- Department of Urology, University of Washington, Seattle, Washington
| | - Gang Liu
- Department of Medicine and GRECC VAPSHCS, University of Washington, Seattle, Washington
| | - Cynthia C Sprenger
- Department of Medicine and GRECC VAPSHCS, University of Washington, Seattle, Washington
| | - Stephen R Plymate
- Department of Medicine and GRECC VAPSHCS, University of Washington, Seattle, Washington
| | - Thomas Bogenrieder
- Boehringer Ingelheim RCV GmbH & Co. KG, Vienna, Austria
- Department of Urology, University Hospital Grosshadern, Ludwig-Maximilians-University, Munich, Germany
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9
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Wang C, Teo CR, Sabapathy K. p53-Related Transcription Targets of TAp73 in Cancer Cells-Bona Fide or Distorted Reality? Int J Mol Sci 2020; 21:ijms21041346. [PMID: 32079264 PMCID: PMC7072922 DOI: 10.3390/ijms21041346] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 02/11/2020] [Accepted: 02/12/2020] [Indexed: 12/22/2022] Open
Abstract
Identification of p73 as a structural homolog of p53 fueled early studies aimed at determining if it was capable of performing p53-like functions. This led to a conundrum as p73 was discovered to be hardly mutated in cancers, and yet, TAp73, the full-length form, was found capable of performing p53-like functions, including transactivation of many p53 target genes in cancer cell lines. Generation of mice lacking p73/TAp73 revealed a plethora of developmental defects, with very limited spontaneous tumors arising only at a later stage. Concurrently, novel TAp73 target genes involved in cellular growth promotion that are not regulated by p53 were identified, mooting the possibility that TAp73 may have diametrically opposite functions to p53 in tumorigenesis. We have therefore comprehensively evaluated the TAp73 target genes identified and validated in human cancer cell lines, to examine their contextual relevance. Data from focused studies aimed at appraising if p53 targets are also regulated by TAp73—often by TAp73 overexpression in cell lines with non-functional p53—were affirmative. However, genome-wide and phenotype-based studies led to the identification of TAp73-regulated genes involved in cellular survival and thus, tumor promotion. Our analyses therefore suggest that TAp73 may not necessarily be p53’s natural substitute in enforcing tumor suppression. It has likely evolved to perform unique functions in regulating developmental processes and promoting cellular growth through entirely different sets of target genes that are not common to, and cannot be substituted by p53. The p53-related targets initially reported to be regulated by TAp73 may therefore represent an experimental possibility rather than the reality.
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Affiliation(s)
- Chao Wang
- Division of Cellular and Molecular Research, Humphrey Oei Institute of Cancer Research, National Cancer Centre Singapore, Singapore 169610, Singapore;
| | - Cui Rong Teo
- Cancer and Stem Cell Biology Program, Duke-NUS Medical School, Singapore 169857, Singapore;
| | - Kanaga Sabapathy
- Division of Cellular and Molecular Research, Humphrey Oei Institute of Cancer Research, National Cancer Centre Singapore, Singapore 169610, Singapore;
- Cancer and Stem Cell Biology Program, Duke-NUS Medical School, Singapore 169857, Singapore;
- Institute of Molecular and Cell Biology, Biopolis, Singapore 138673, Singapore
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228, Singapore
- Correspondence:
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10
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Singh S, Shukla R. Key Signaling Pathways Engaged in Cancer Management: Current Update. CURRENT CANCER THERAPY REVIEWS 2020. [DOI: 10.2174/1573394714666180904122412] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
<P>Background: Till today cancer is still challenging to treat and needs more active therapeutic approaches. Participation of complex multi-pathway cell propagation instrument is a noteworthy issue in creating active anticancer therapeutic methodologies. Immune evasions, metabolic modifications, imperfect apoptotic component, modification in upstream or downstream RAS signaling, altered nuclear factor kappa B actions, imbalanced autophagy design and distortedly controlled angiogenesis are distinguishing features of cancer. </P><P> Methods: On the basis of systemic research and analysis of the current online available database, we analyzed and reported about the key signaling pathway engaged with cancer development outlining the effectiveness of different therapeutic measures and targets that have been created or are being researched to obstruct the cancer development. </P><P> Results: A number of signaling pathways, for example, resistant, metabolism, apoptosis, RAS protein, nuclear factor kappa B, autophagy, and angiogenesis have been perceived as targets for drug treatment to control the advancement, development and administration of cancer. </P><P> Conclusion: A noteworthy challenge for future medication advancement is to detail a synthesis treatment influencing distinctive targets to enhance the treatment of cancer.</P>
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Affiliation(s)
- Sanjiv Singh
- National Institute of Pharmaceutical Science and Education, Shree Bhawani Paper Mill Road, ITI Compound, Raebareli-229010 (U.P.), India
| | - Rahul Shukla
- National Institute of Pharmaceutical Science and Education, Shree Bhawani Paper Mill Road, ITI Compound, Raebareli-229010 (U.P.), India
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11
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Li S, Han J, Guo G, Sun Y, Zhang T, Zhao M, Xu Y, Cui Y, Liu Y, Zhang J. Voltage-gated sodium channels β3 subunit promotes tumorigenesis in hepatocellular carcinoma by facilitating p53 degradation. FEBS Lett 2019; 594:497-508. [PMID: 31626714 DOI: 10.1002/1873-3468.13641] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 10/03/2019] [Accepted: 10/08/2019] [Indexed: 11/08/2022]
Abstract
The voltage-gated sodium channels (VGSCs) are aberrantly expressed in a variety of tumors and play an important role in tumor growth and metastasis. Here, we show that VGSCs auxiliary β3 subunit, encoded by the SCN3B gene, promotes proliferation and suppresses apoptosis in HepG2 cells by promoting p53 degradation. β3 significantly increases HepG2 cell proliferation, promotes tumor growth in mouse xenograft models, and suppresses senescence and apoptosis. We found that β3 knockdown stabilizes p53 protein, leading to potentiation of p53-induced cell cycle arrest, senescence, and apoptosis. Mechanistic studies revealed that β3 could bind to p53, promoting p53 ubiquitination and degradation by stabilizing the p53/MDM2 complex. Our results suggest that β3 is a novel negative regulator of p53 and a potential oncogenic factor.
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Affiliation(s)
- Shuai Li
- School of Life Sciences and Biopharmaceutical Science, Shenyang Pharmaceutical University, China
| | - Jiadi Han
- School of Life Sciences and Biopharmaceutical Science, Shenyang Pharmaceutical University, China
| | - Guili Guo
- School of Life Sciences and Biopharmaceutical Science, Shenyang Pharmaceutical University, China
| | - Yudi Sun
- School of Life Sciences and Biopharmaceutical Science, Shenyang Pharmaceutical University, China
| | - Tingting Zhang
- School of Life Sciences and Biopharmaceutical Science, Shenyang Pharmaceutical University, China
| | - Mingyi Zhao
- School of Life Sciences and Biopharmaceutical Science, Shenyang Pharmaceutical University, China
| | - Yijia Xu
- School of Life Sciences and Biopharmaceutical Science, Shenyang Pharmaceutical University, China
| | - Yong Cui
- School of Medical Devices, Shenyang Pharmaceutical University, China
| | - Yanfeng Liu
- School of Life Sciences and Biopharmaceutical Science, Shenyang Pharmaceutical University, China
| | - Jinghai Zhang
- School of Life Sciences and Biopharmaceutical Science, Shenyang Pharmaceutical University, China.,School of Medical Devices, Shenyang Pharmaceutical University, China
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12
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Han D, Schomacher L, Schüle KM, Mallick M, Musheev MU, Karaulanov E, Krebs L, von Seggern A, Niehrs C. NEIL1 and NEIL2 DNA glycosylases protect neural crest development against mitochondrial oxidative stress. eLife 2019; 8:49044. [PMID: 31566562 PMCID: PMC6768664 DOI: 10.7554/elife.49044] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 09/12/2019] [Indexed: 12/11/2022] Open
Abstract
Base excision repair (BER) functions not only in the maintenance of genomic integrity but also in active DNA demethylation and epigenetic gene regulation. This dual role raises the question if phenotypic abnormalities resulting from deficiency of BER factors are due to DNA damage or impaired DNA demethylation. Here we investigate the bifunctional DNA glycosylases/lyases NEIL1 and NEIL2, which act in repair of oxidative lesions and in epigenetic demethylation. Neil-deficiency in Xenopus embryos and differentiating mouse embryonic stem cells (mESCs) leads to a surprisingly restricted defect in cranial neural crest cell (cNCC) development. Neil-deficiency elicits an oxidative stress-induced TP53-dependent DNA damage response, which impairs early cNCC specification. Epistasis experiments with Tdg-deficient mESCs show no involvement of epigenetic DNA demethylation. Instead, Neil-deficiency results in oxidative damage specific to mitochondrial DNA, which triggers a TP53-mediated intrinsic apoptosis. Thus, NEIL1 and NEIL2 DNA glycosylases protect mitochondrial DNA against oxidative damage during neural crest differentiation. The face of animals with a backbone is formed in great part by a group of cells called cranial neural crest cells. When too few of these cells are made, the skull and the face can become deformed. For example, the jaw- or cheekbones can be underdeveloped or there may be defects in the eyes or ears. These types of abnormalities are among the most common birth defects known in humans. NEIL1 and NEIL2 are mouse proteins with two roles. On the one hand, they help protect DNA from damage by acting as so-called ‘base excision repair enzymes’, meaning they remove damaged building blocks of DNA. On the other hand, they help remove a chemical group known as a methyl from DNA building blocks in a process called demethylation, which is involved both in development and disease. Previous research by Schomacher et al. in 2016 showed that, in frogs, the absence of a similar protein called Neil2, leads to deformities of the face and skull. Han et al. – who include some of the researchers involved in the 2016 study – have now used frog embryos and mouse embryonic stem cells to examine the role of the NEIL proteins in cranial neural crest cells. Stem cells can become any type of cell in the body, but when NEIL1 and NEIL2 are missing, these cells lose the ability to become cranial neural crest cells. To determine whether the effects of removing NEIL1 and NEIL2 were due to their role in DNA damage repair or demethylation, Han et al. removed two proteins, each involved in one of the two processes. Removing APEX1, which is involved in DNA damage repair, had similar effects to the removal of NEIL1 and NEIL2, while removing TDG, which only works in demethylation, did not. This indicates that NEIL1 and NEIL2’s role in DNA damage repair is likely necessary for stem cells to become cranial neural crest cells. Although NEIL1 and NEIL2 are part of the DNA repair machinery, Han et al. showed that when stem cells turn into cranial neural crest cells, these proteins are not protecting the cell’s genomic DNA. Instead, they are active in the mitochondria, the compartments of the cell responsible for producing energy, which have their own DNA. Mitochondria use oxygen to produce energy, but by-products of these reactions damage mitochondrial DNA, explaining why mitochondria need NEIL1 and NEIL2. These results suggest that antioxidants, which are molecules that protect the cells from the damaging oxygen derivatives, may help prevent deformities in the face and skull. This theory could be tested using mice that do not produce proteins involved in base excision repair, which could be derived from the cells lacking NEIL1 and NEIL2.
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Affiliation(s)
- Dandan Han
- Institute of Molecular Biology (IMB), Mainz, Germany
| | | | | | | | | | | | - Laura Krebs
- Institute of Molecular Biology (IMB), Mainz, Germany
| | | | - Christof Niehrs
- Institute of Molecular Biology (IMB), Mainz, Germany.,Division of Molecular Embryology, DKFZ-ZMBH Alliance, Heidelberg, Germany
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13
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Yamada K, Yoshida K. Mechanical insights into the regulation of programmed cell death by p53 via mitochondria. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2019; 1866:839-848. [DOI: 10.1016/j.bbamcr.2019.02.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 02/13/2019] [Accepted: 02/13/2019] [Indexed: 02/08/2023]
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14
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Khanal T, Leung YK, Jiang W, Timchenko N, Ho SM, Kim K. NR2E3 is a key component in p53 activation by regulating a long noncoding RNA DINO in acute liver injuries. FASEB J 2019; 33:8335-8348. [PMID: 30991008 DOI: 10.1096/fj.201801881rr] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Damage-induced long noncoding RNA (DINO) is a long noncoding RNA that directly interacts with p53 and thereby enhances p53 stability and activity in response to various cellular stresses. Here, we demonstrate that nuclear receptor subfamily 2 group E member 3 (NR2E3) plays a crucial role in maintaining active DINO epigenetic status for its proper induction and subsequent p53 activation. In acetaminophen (APAP)- or carbon tetrachloride-induced acute liver injuries, NR2E3 knockout (KO) mice exhibited far more severe liver injuries due to impaired DINO induction and p53 activation. Mechanistically, NR2E3 loss both in vivo and in vitro induced epigenetic DINO repression accompanied by reduced DINO chromatin accessibility. Furthermore, compared with the efficient reversal by a typical antidote N-acetylcysteine (NAC) treatment of APAP-induced liver injury in wild-type mice, the liver injury of NR2E3 KO mice was not effectively reversed, indicating that an intact NR2E3-DINO-p53-signaling axis is essential for NAC-mediated recovery against APAP-induced hepatotoxicity. These findings establish that NR2E3 is a critical component in p53 activation and a novel susceptibility factor to drug- or toxicant-induced acute liver injuries.-Khanal, T., Leung, Y.-K., Jiang, W., Timchenko, N., Ho, S.-M., Kim, K. NR2E3 is a key component in p53 activation by regulating a long noncoding RNA DINO in acute liver injuries.
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Affiliation(s)
- Tilak Khanal
- Department of Environmental Health, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Yuet-Kin Leung
- Department of Environmental Health, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Wang Jiang
- Department of Pathology and Laboratory Medicine, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Nicolai Timchenko
- Division of Pediatric General and Thoracic Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Shuk-Mei Ho
- Department of Environmental Health, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Kyounghyun Kim
- Department of Environmental Health, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
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15
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Ross JA, Dungen KV, Bressler KR, Fredriksen M, Khandige Sharma D, Balasingam N, Thakor N. Eukaryotic initiation factor 5B (eIF5B) provides a critical cell survival switch to glioblastoma cells via regulation of apoptosis. Cell Death Dis 2019; 10:57. [PMID: 30670698 PMCID: PMC6342974 DOI: 10.1038/s41419-018-1283-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 11/29/2018] [Accepted: 12/07/2018] [Indexed: 12/26/2022]
Abstract
Physiological stress conditions attenuate global mRNA translation via modifications of key eukaryotic initiation factors. However, non-canonical translation initiation mechanisms allow cap-independent translation of certain mRNAs. We have previously demonstrated that eIF5B promotes cap-independent translation of the mRNA encoding the antiapoptotic factor, XIAP, during cellular stress. Here, we show that depletion of eIF5B sensitizes glioblastoma multiforme cells to TRAIL-induced apoptosis by a pathway involving caspases-8, −9, and −7, with no significant effect on cell cycle progression. eIF5B promotes evasion of apoptosis by promoting the translation of several IRES-containing mRNAs, encoding the antiapoptotic proteins XIAP, Bcl-xL, cIAP1, and c-FLIPS. We also show that eIF5B promotes translation of nuclear factor erythroid 2-related factor 2 and suggest that reactive oxygen species contribute to increased apoptosis under conditions of eIF5B depletion. Finally, eIF5B depletion leads to decreased activation of the canonical NF-κB pathway. Taken together, our data suggest that eIF5B represents a regulatory node, allowing cancer cells to evade apoptosis by promoting the translation of pro-survival proteins from IRES-containing mRNAs.
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Affiliation(s)
- Joseph A Ross
- Department of Chemistry and Biochemistry, University of Lethbridge, 4401 University Drive W, Lethbridge, AB, T1K 3M4, Canada
| | - Keiran Vanden Dungen
- Department of Chemistry and Biochemistry, University of Lethbridge, 4401 University Drive W, Lethbridge, AB, T1K 3M4, Canada
| | - Kamiko R Bressler
- Department of Chemistry and Biochemistry, University of Lethbridge, 4401 University Drive W, Lethbridge, AB, T1K 3M4, Canada
| | - Mikayla Fredriksen
- Department of Chemistry and Biochemistry, University of Lethbridge, 4401 University Drive W, Lethbridge, AB, T1K 3M4, Canada
| | - Divya Khandige Sharma
- Department of Chemistry and Biochemistry, University of Lethbridge, 4401 University Drive W, Lethbridge, AB, T1K 3M4, Canada
| | - Nirujah Balasingam
- Department of Chemistry and Biochemistry, University of Lethbridge, 4401 University Drive W, Lethbridge, AB, T1K 3M4, Canada
| | - Nehal Thakor
- Department of Chemistry and Biochemistry, University of Lethbridge, 4401 University Drive W, Lethbridge, AB, T1K 3M4, Canada. .,Canadian Centre for Behavioral Neuroscience (CCBN), Department of Neuroscience, University of Lethbridge, 4401 University Drive W, Lethbridge, AB, T1K 3M4, Canada. .,Arnie Charbonneau Cancer Institute, Cumming School of Medicine, University of Calgary, 3280 Hospital Drive NW, Calgary, AB, T2N 4Z6, Canada.
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16
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Ji H, Huang C, Wu S, Kasim V. XBP1-s promotes colorectal cancer cell proliferation by inhibiting TAp73 transcriptional activity. Biochem Biophys Res Commun 2018; 508:203-209. [PMID: 30473215 DOI: 10.1016/j.bbrc.2018.11.112] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 11/18/2018] [Indexed: 11/30/2022]
Abstract
Endoplasmic reticulum (ER) stress activation could be found in a wide range of human tumors. ER stress induces the splicing of X-box binding protein 1 (XBP1) to form its splicing variant XBP1-s, which in turn activates various ER stress-related genes. XBP1-s is highly expressed in various tumors; however, its role in tumorigenesis is still largely unknown. Herein we showed that XBP1-s suppresses the expression of tumor suppressor TAp73, a member of p53 family with high homology with p53, by directly binds to TAp73 promoter and suppresses its transcriptional activity. We also found that overexpression of TAp73 cancelled the effect of XPB1-s on enhancing colorectal cancer cells proliferation and colony formation potential, indicating that TAp73 is critical for XBP1-s-induced tumorigenesis. Together, our findings not only reveal a novel mechanism of TAp73 aberrant regulation in tumor cells, but also link up tumor cells ER stress with tumor suppressive activity of TAp73.
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Affiliation(s)
- Hong Ji
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, 400044, China
| | - Can Huang
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, 400044, China
| | - Shourong Wu
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, 400044, China; The 111 Project Laboratory of Biomechanics and Tissue Repair, College of Bioengineering, Chongqing University, Chongqing, 400044, China; State and Local Joint Engineering Laboratory for Vascular Implants, Chongqing, 400044, China
| | - Vivi Kasim
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, 400044, China; The 111 Project Laboratory of Biomechanics and Tissue Repair, College of Bioengineering, Chongqing University, Chongqing, 400044, China; State and Local Joint Engineering Laboratory for Vascular Implants, Chongqing, 400044, China.
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17
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Ménard M, Costechareyre C, Ichim G, Blachier J, Neves D, Jarrosson-Wuilleme L, Depping R, Koster J, Saintigny P, Mehlen P, Tauszig-Delamasure S. Hey1- and p53-dependent TrkC proapoptotic activity controls neuroblastoma growth. PLoS Biol 2018; 16:e2002912. [PMID: 29750782 PMCID: PMC5965893 DOI: 10.1371/journal.pbio.2002912] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 05/23/2018] [Accepted: 04/13/2018] [Indexed: 11/19/2022] Open
Abstract
The neurotrophin-3 (NT-3) receptor tropomyosin receptor kinase C (TrkC/NTRK3) has been described as a dependence receptor and, as such, triggers apoptosis in the absence of its ligand NT-3. This proapoptotic activity has been proposed to confer a tumor suppressor activity to this classic tyrosine kinase receptor (RTK). By investigating interacting partners that might facilitate TrkC-induced cell death, we have identified the basic helix-loop-helix (bHLH) transcription factor Hey1 and importin-α3 (karyopherin alpha 4 [KPNA4]) as direct interactors of TrkC intracellular domain, and we show that Hey1 is required for TrkC-induced apoptosis. We propose here that the cleaved proapoptotic portion of TrkC intracellular domain (called TrkC killer-fragment [TrkC-KF]) is translocated to the nucleus by importins and interacts there with Hey1. We also demonstrate that Hey1 and TrkC-KF transcriptionally silence mouse double minute 2 homolog (MDM2), thus contributing to p53 stabilization. p53 transcriptionally regulates the expression of TrkC-KF cytoplasmic and mitochondrial interactors cofactor of breast cancer 1 (COBRA1) and B cell lymphoma 2–associated X (BAX), which will subsequently trigger the intrinsic pathway of apoptosis. Of interest, TrkC was proposed to constrain tumor progression in neuroblastoma (NB), and we demonstrate in an avian model that TrkC tumor suppressor activity requires Hey1 and p53. Tropomyosin receptor kinase C (TrkC) is a transmembrane receptor at the cell surface and has been described to work paradoxically both as an oncogene and as a tumor suppressor. We partly solved this paradox in a previous study, demonstrating that TrkC is a double-facet receptor: Upon interaction with its ligand neurotrophin-3 (NT-3), TrkC has a tyrosine kinase activity and induces survival and proliferation of the cell; conversely, in the absence of the ligand, TrkC is cleaved and releases a "killer-fragment" that triggers apoptosis. In this study, we analyze the fate of this fragment and show that TrkC killer-fragment is translocated to the nucleus, where it stabilizes the apoptosis inducer p53. We further find that p53 activates the transcription of cytoplasmic molecular partners, which interact with TrkC killer-fragment and induce apoptosis. We also demonstrate that alteration of this mechanism favors tumor growth in neuroblastoma (NB), an avian tumor progression model for a pediatric cancer.
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Affiliation(s)
- Marie Ménard
- Apoptosis, Cancer and Development Laboratory—Equipe labellisée ‘La Ligue’, LabEx DEVweCAN, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Université de Lyon, Centre Léon Bérard, Lyon, France
| | - Clélia Costechareyre
- Apoptosis, Cancer and Development Laboratory—Equipe labellisée ‘La Ligue’, LabEx DEVweCAN, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Université de Lyon, Centre Léon Bérard, Lyon, France
| | - Gabriel Ichim
- Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Université de Lyon, Centre Léon Bérard, Lyon, France
| | - Jonathan Blachier
- Apoptosis, Cancer and Development Laboratory—Equipe labellisée ‘La Ligue’, LabEx DEVweCAN, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Université de Lyon, Centre Léon Bérard, Lyon, France
| | - David Neves
- Apoptosis, Cancer and Development Laboratory—Equipe labellisée ‘La Ligue’, LabEx DEVweCAN, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Université de Lyon, Centre Léon Bérard, Lyon, France
| | - Loraine Jarrosson-Wuilleme
- Apoptosis, Cancer and Development Laboratory—Equipe labellisée ‘La Ligue’, LabEx DEVweCAN, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Université de Lyon, Centre Léon Bérard, Lyon, France
| | - Reinhard Depping
- Universität zu Lübeck, Institut für Physiologie, Zentrum für Medizinische Struktur und Zellbiologie, Lübeck, Germany
| | - Jan Koster
- Department of Oncogenomics, Academic Medical Center, Amsterdam, the Netherlands
| | - Pierre Saintigny
- Department of translational Research and Innovation, Centre Léon Bérard, Lyon, France
| | - Patrick Mehlen
- Apoptosis, Cancer and Development Laboratory—Equipe labellisée ‘La Ligue’, LabEx DEVweCAN, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Université de Lyon, Centre Léon Bérard, Lyon, France
- Department of translational Research and Innovation, Centre Léon Bérard, Lyon, France
- * E-mail: (PM); (ST)
| | - Servane Tauszig-Delamasure
- Apoptosis, Cancer and Development Laboratory—Equipe labellisée ‘La Ligue’, LabEx DEVweCAN, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Université de Lyon, Centre Léon Bérard, Lyon, France
- * E-mail: (PM); (ST)
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18
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Lima S, Takabe K, Newton J, Saurabh K, Young MM, Leopoldino AM, Hait NC, Roberts JL, Wang HG, Dent P, Milstien S, Booth L, Spiegel S. TP53 is required for BECN1- and ATG5-dependent cell death induced by sphingosine kinase 1 inhibition. Autophagy 2018; 14:942-957. [PMID: 29368980 DOI: 10.1080/15548627.2018.1429875] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The bioactive sphingolipid metabolite sphingosine-1-phosphate (S1P) and the enzyme that produces it, SPHK1 (sphingosine kinase 1), regulate many processes important for the etiology of cancer. It has been suggested that SPHK1 levels are regulated by the tumor suppressor protein TP53, a key regulator of cell cycle arrest, apoptosis, and macroautophagy/autophagy. However, little is still known of the relationship between TP53 and SPHK1 activity in the regulation of these processes. To explore this link, we examined the effects of inhibiting SPHK1 in wild-type and TP53 null cancer cell lines. SK1-I, an analog of sphingosine and isozyme-specific SPHK1 inhibitor, suppressed cancer cell growth and clonogenic survival in a TP53-dependent manner. It also more strongly enhanced intrinsic apoptosis in wild-type TP53 cells than in isogenic TP53 null cells. Intriguingly, SK1-I induced phosphorylation of TP53 on Ser15, which increases its transcriptional activity. Consequently, levels of TP53 downstream targets such as pro-apoptotic members of the BCL2 family, including BAX, BAK1, and BID were increased in wild-type but not in TP53 null cells. Inhibition of SPHK1 also increased the formation of autophagic and multivesicular bodies, and increased processing of LC3 and its localization within acidic compartments in a TP53-dependent manner. SK1-I also induced massive accumulation of vacuoles, enhanced autophagy, and increased cell death in an SPHK1-dependent manner that also required TP53 expression. Importantly, downregulation of the key regulators of autophagic flux, BECN1 and ATG5, dramatically decreased the cytotoxicity of SK1-I only in cells with TP53 expression. Hence, our results reveal that TP53 plays an important role in vacuole-associated cell death induced by SPHK1 inhibition in cancer cells.
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Affiliation(s)
- Santiago Lima
- a Department of Biochemistry and Molecular Biology , Virginia Commonwealth University School of Medicine , Richmond , VA USA
| | - Kazuaki Takabe
- a Department of Biochemistry and Molecular Biology , Virginia Commonwealth University School of Medicine , Richmond , VA USA.,c Department of Surgery and the Massey Cancer Center , Virginia Commonwealth University School of Medicine , Richmond , VA USA
| | - Jason Newton
- a Department of Biochemistry and Molecular Biology , Virginia Commonwealth University School of Medicine , Richmond , VA USA
| | - Kumar Saurabh
- a Department of Biochemistry and Molecular Biology , Virginia Commonwealth University School of Medicine , Richmond , VA USA
| | - Megan M Young
- d Department of Pharmacology , Department of Pediatrics , Penn State University College of Medicine , Hershey , PA , USA
| | - Andreia Machado Leopoldino
- b Department of Clinical Analysis, Toxicology and Food Sciences , School of Pharmaceutical Sciences of Riberião Preto , University of São Paulo , Ribeirão Preto , SP , Brazil
| | - Nitai C Hait
- a Department of Biochemistry and Molecular Biology , Virginia Commonwealth University School of Medicine , Richmond , VA USA
| | - Jane L Roberts
- a Department of Biochemistry and Molecular Biology , Virginia Commonwealth University School of Medicine , Richmond , VA USA
| | - Hong-Gang Wang
- d Department of Pharmacology , Department of Pediatrics , Penn State University College of Medicine , Hershey , PA , USA
| | - Paul Dent
- a Department of Biochemistry and Molecular Biology , Virginia Commonwealth University School of Medicine , Richmond , VA USA
| | - Sheldon Milstien
- a Department of Biochemistry and Molecular Biology , Virginia Commonwealth University School of Medicine , Richmond , VA USA
| | - Laurence Booth
- a Department of Biochemistry and Molecular Biology , Virginia Commonwealth University School of Medicine , Richmond , VA USA
| | - Sarah Spiegel
- a Department of Biochemistry and Molecular Biology , Virginia Commonwealth University School of Medicine , Richmond , VA USA
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19
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Reyes-Sebastian J, Montiel-Cervantes LA, Reyes-Maldonado E, Dominguez-Lopez ML, Ortiz-Butron R, Castillo-Alvarez A, Lezama RA. Cell proliferation and inhibition of apoptosis are related to c-Kit activation in leukaemic lymphoblasts. Hematology 2018; 23:486-495. [DOI: 10.1080/10245332.2018.1444564] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Josefina Reyes-Sebastian
- Escuela Nacional de Ciencias Biologicas, Instituto Politecnico Nacional, Ciudad de México, Mexico
| | | | - Elba Reyes-Maldonado
- Escuela Nacional de Ciencias Biologicas, Instituto Politecnico Nacional, Ciudad de México, Mexico
| | | | - Rocio Ortiz-Butron
- Escuela Nacional de Ciencias Biologicas, Instituto Politecnico Nacional, Ciudad de México, Mexico
| | - Aida Castillo-Alvarez
- Departamento de fisiologia, Centro de Investigacion y de estudios Avanzados-IPN, Ciudad de México, Mexico
| | - Ruth Angélica Lezama
- Escuela Nacional de Ciencias Biologicas, Instituto Politecnico Nacional, Ciudad de México, Mexico
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20
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Elkin ER, Harris SM, Loch-Caruso R. Trichloroethylene metabolite S-(1,2-dichlorovinyl)-l-cysteine induces lipid peroxidation-associated apoptosis via the intrinsic and extrinsic apoptosis pathways in a first-trimester placental cell line. Toxicol Appl Pharmacol 2018; 338:30-42. [PMID: 29129777 PMCID: PMC5741094 DOI: 10.1016/j.taap.2017.11.006] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 11/07/2017] [Accepted: 11/08/2017] [Indexed: 12/31/2022]
Abstract
Trichloroethylene (TCE), a prevalent environmental contaminant, is a potent renal and hepatic toxicant through metabolites such as S-(1, 2-dichlorovinyl)-l-cysteine (DCVC). However, effects of TCE on other target organs such as the placenta have been minimally explored. Because elevated apoptosis and lipid peroxidation in placenta have been observed in pregnancy morbidities involving poor placentation, we evaluated the effects of DCVC exposure on apoptosis and lipid peroxidation in a human extravillous trophoblast cell line, HTR-8/SVneo. We exposed the cells in vitro to 10-100μM DCVC for various time points up to 24h. Following exposure, we measured apoptosis using flow cytometry, caspase activity using luminescence assays, gene expression using qRT-PCR, and lipid peroxidation using a malondialdehyde quantification assay. DCVC significantly increased apoptosis in time- and concentration-dependent manners (p<0.05). DCVC also significantly stimulated caspase 3, 7, 8 and 9 activities after 12h (p<0.05), suggesting that DCVC stimulates the activation of both the intrinsic and extrinsic apoptotic signaling pathways simultaneously. Pre-treatment with the tBID inhibitor Bl-6C9 partially reduced DCVC-stimulated caspase 3 and 7 activity, signifying crosstalk between the two pathways. Additionally, DCVC treatment increased lipid peroxidation in a concentration-dependent manner. Co-treatment with the antioxidant peroxyl radical scavenger (±)-α-tocopherol attenuated caspase 3 and 7 activity, suggesting that lipid peroxidation mediates DCVC-induced apoptosis in extravillous trophoblasts. Our findings suggest that DCVC-induced apoptosis and lipid peroxidation in extravillous trophoblasts could contribute to poor placentation if similar effects occur in vivo in response to TCE exposure, indicating that further studies into this mechanism are warranted.
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Affiliation(s)
- Elana R Elkin
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI 48109-2029, USA.
| | - Sean M Harris
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI 48109-2029, USA.
| | - Rita Loch-Caruso
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI 48109-2029, USA.
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21
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Scott DD, Trahan C, Zindy PJ, Aguilar LC, Delubac MY, Van Nostrand EL, Adivarahan S, Wei KE, Yeo GW, Zenklusen D, Oeffinger M. Nol12 is a multifunctional RNA binding protein at the nexus of RNA and DNA metabolism. Nucleic Acids Res 2017; 45:12509-12528. [PMID: 29069457 PMCID: PMC5716212 DOI: 10.1093/nar/gkx963] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 10/01/2017] [Accepted: 10/09/2017] [Indexed: 12/29/2022] Open
Abstract
To counteract the breakdown of genome integrity, eukaryotic cells have developed a network of surveillance pathways to prevent and resolve DNA damage. Recent data has recognized the importance of RNA binding proteins (RBPs) in DNA damage repair (DDR) pathways. Here, we describe Nol12 as a multifunctional RBP with roles in RNA metabolism and genome maintenance. Nol12 is found in different subcellular compartments-nucleoli, where it associates with ribosomal RNA and is required for efficient separation of large and small subunit precursors at site 2; the nucleoplasm, where it co-localizes with the RNA/DNA helicase Dhx9 and paraspeckles; as well as GW/P-bodies in the cytoplasm. Loss of Nol12 results in the inability of cells to recover from DNA stress and a rapid p53-independent ATR-Chk1-mediated apoptotic response. Nol12 co-localizes with DNA repair proteins in vivo including Dhx9, as well as with TOPBP1 at sites of replication stalls, suggesting a role for Nol12 in the resolution of DNA stress and maintenance of genome integrity. Identification of a complex Nol12 interactome, which includes NONO, Dhx9, DNA-PK and Stau1, further supports the protein's diverse functions in RNA metabolism and DNA maintenance, establishing Nol12 as a multifunctional RBP essential for genome integrity.
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Affiliation(s)
- Daniel D. Scott
- Institut de Recherches Cliniques de Montréal, 110 Avenue des Pins Ouest, Montréal, Québec H2W 1R7, Canada
- Faculty of Medicine, Division of Experimental Medicine, McGill University, Montréal, Québec H3A 1A3, Canada
| | - Christian Trahan
- Institut de Recherches Cliniques de Montréal, 110 Avenue des Pins Ouest, Montréal, Québec H2W 1R7, Canada
- Département de Biochimie, Faculté de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Pierre J. Zindy
- Institut de Recherches Cliniques de Montréal, 110 Avenue des Pins Ouest, Montréal, Québec H2W 1R7, Canada
| | - Lisbeth C. Aguilar
- Institut de Recherches Cliniques de Montréal, 110 Avenue des Pins Ouest, Montréal, Québec H2W 1R7, Canada
| | - Marc Y. Delubac
- Institut de Recherches Cliniques de Montréal, 110 Avenue des Pins Ouest, Montréal, Québec H2W 1R7, Canada
- Département de Biochimie, Faculté de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Eric L. Van Nostrand
- Department of Cellular and Molecular Medicine, University of California at San Diego, La Jolla, CA, USA; Stem Cell Program, University of California at San Diego, La Jolla, CA, USA; Institute for Genomic Medicine, University of California at San Diego, La Jolla, CA, USA
| | - Srivathsan Adivarahan
- Département de Biochimie, Faculté de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Karen E. Wei
- Institut de Recherches Cliniques de Montréal, 110 Avenue des Pins Ouest, Montréal, Québec H2W 1R7, Canada
| | - Gene W. Yeo
- Department of Cellular and Molecular Medicine, University of California at San Diego, La Jolla, CA, USA; Stem Cell Program, University of California at San Diego, La Jolla, CA, USA; Institute for Genomic Medicine, University of California at San Diego, La Jolla, CA, USA
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Molecular Engineering Laboratory, A*STAR, Singapore
| | - Daniel Zenklusen
- Département de Biochimie, Faculté de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Marlene Oeffinger
- Institut de Recherches Cliniques de Montréal, 110 Avenue des Pins Ouest, Montréal, Québec H2W 1R7, Canada
- Faculty of Medicine, Division of Experimental Medicine, McGill University, Montréal, Québec H3A 1A3, Canada
- Département de Biochimie, Faculté de Médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
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22
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Dashzeveg N, Yoshida K. Crosstalk between tumor suppressors p53 and PKCδ: Execution of the intrinsic apoptotic pathways. Cancer Lett 2016; 377:158-63. [PMID: 27130668 DOI: 10.1016/j.canlet.2016.04.032] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 04/21/2016] [Accepted: 04/21/2016] [Indexed: 01/23/2023]
Abstract
p53 and PKCδ are tumor suppressors that execute apoptotic mechanisms in response to various cellular stresses. p53 is a transcription factor that is frequently mutated in human cancers; it regulates apoptosis in transcription-dependent and -independent ways in response to genotoxic stresses. PKCδ is a serine/threonine protein kinase and mutated in human cancers. Available evidence shows that PKCδ activates p53 by direct and/or indirect mechanisms. Moreover, PKCδ is also implicated in the transcriptional regulation of p53 in response to DNA damage. Recent findings demonstrated that p53, in turn, binds onto the PKCδ promoter and induces its expression upon DNA damage to facilitate apoptosis. Both p53 and PKCδ are associated with the apoptotic mechanisms in the mitochondria by regulating Bcl-2 family proteins to provide mitochondrial outer membrane permeabilization. This review discusses the crosstalk between p53 and PKCδ in the context of apoptotic cell death and cancer therapy.
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Affiliation(s)
- Nurmaa Dashzeveg
- Department of Biochemistry, Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo 105-8461, Japan
| | - Kiyotsugu Yoshida
- Department of Biochemistry, Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo 105-8461, Japan.
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23
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Kim DS, Jin H, Anantharam V, Gordon R, Kanthasamy A, Kanthasamy AG. p73 gene in dopaminergic neurons is highly susceptible to manganese neurotoxicity. Neurotoxicology 2016; 59:231-239. [PMID: 27107493 DOI: 10.1016/j.neuro.2016.04.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 04/18/2016] [Accepted: 04/18/2016] [Indexed: 12/21/2022]
Abstract
Chronic exposure to elevated levels of manganese (Mn) has been linked to a Parkinsonian-like movement disorder, resulting from dysfunction of the extrapyramidal motor system within the basal ganglia. However, the exact cellular and molecular mechanisms of Mn-induced neurotoxicity remain elusive. In this study, we treated C57BL/6J mice with 30mg/kg Mn via oral gavage for 30 days. Interestingly, in nigral tissues of Mn-exposed mice, we found a significant downregulation of the truncated isoform of p73 protein at the N-terminus (ΔNp73). To further determine the functional role of Mn-induced p73 downregulation in Mn neurotoxicity, we examined the interrelationship between the effect of Mn on p73 gene expression and apoptotic cell death in an N27 dopaminergic neuronal model. Consistent with our animal study, 300μM Mn treatment significantly suppressed p73 mRNA expression in N27 dopaminergic cells. We further determined that protein levels of the ΔNp73 isoform was also reduced in Mn-treated N27 cells and primary striatal cultures. Furthermore, overexpression of ΔNp73 conferred modest cellular protection against Mn-induced neurotoxicity. Taken together, our results demonstrate that Mn exposure downregulates p73 gene expression resulting in enhanced susceptibility to apoptotic cell death. Thus, further characterization of the cellular mechanism underlying p73 gene downregulation will improve our understanding of the molecular underpinnings of Mn neurotoxicity.
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Affiliation(s)
- Dong-Suk Kim
- Parkinson's Disorder Research Laboratory, Iowa Center for Advanced Neurotoxicology, Department of Biomedical Sciences, Iowa State University, Ames, IA 50011, United States
| | - Huajun Jin
- Parkinson's Disorder Research Laboratory, Iowa Center for Advanced Neurotoxicology, Department of Biomedical Sciences, Iowa State University, Ames, IA 50011, United States
| | - Vellareddy Anantharam
- Parkinson's Disorder Research Laboratory, Iowa Center for Advanced Neurotoxicology, Department of Biomedical Sciences, Iowa State University, Ames, IA 50011, United States
| | - Richard Gordon
- Parkinson's Disorder Research Laboratory, Iowa Center for Advanced Neurotoxicology, Department of Biomedical Sciences, Iowa State University, Ames, IA 50011, United States
| | - Arthi Kanthasamy
- Parkinson's Disorder Research Laboratory, Iowa Center for Advanced Neurotoxicology, Department of Biomedical Sciences, Iowa State University, Ames, IA 50011, United States
| | - Anumantha G Kanthasamy
- Parkinson's Disorder Research Laboratory, Iowa Center for Advanced Neurotoxicology, Department of Biomedical Sciences, Iowa State University, Ames, IA 50011, United States.
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24
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Hörber S, Hildebrand DG, Lieb WS, Lorscheid S, Hailfinger S, Schulze-Osthoff K, Essmann F. The Atypical Inhibitor of NF-κB, IκBζ, Controls Macrophage Interleukin-10 Expression. J Biol Chem 2016; 291:12851-12861. [PMID: 27129283 DOI: 10.1074/jbc.m116.718825] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Indexed: 12/31/2022] Open
Abstract
Macrophages constitute a first line of pathogen defense by triggering a number of inflammatory responses and the secretion of various pro-inflammatory cytokines. Recently, we and others found that IκBζ, an atypical IκB family member and transcriptional coactivator of selected NF-κB target genes, is essential for macrophage expression of a subset of pro-inflammatory cytokines, such as IL-6, IL-12, and CCL2. Despite defective pro-inflammatory cytokine expression, however, IκBζ-deficient mice develop symptoms of chronic inflammation. To elucidate this discrepancy, we analyzed a regulatory role of IκBζ for the expression of anti-inflammatory cytokines and identified IκBζ as an essential activator of IL-10 expression. LPS-challenged peritoneal and bone marrow-derived macrophages from IκBζ-deficient mice revealed strongly decreased transcription and secretion of IL-10 compared with wild-type mice. Moreover, ectopic expression of IκBζ was sufficient to stimulate Il10 transcription. On the molecular level, IκBζ directly activated the Il10 promoter at a proximal κB site and was required for the transcription-enhancing trimethylation of histone 3 at lysine 4. Together, our findings show for the first time the IκBζ-dependent expression of an anti-inflammatory cytokine that is crucial in controlling immune responses.
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Affiliation(s)
- Sebastian Hörber
- From the Interfaculty Institute of Biochemistry, Department of Molecular Medicine, University of Tübingen, 72076 Tübingen, Germany and
| | - Dominic G Hildebrand
- From the Interfaculty Institute of Biochemistry, Department of Molecular Medicine, University of Tübingen, 72076 Tübingen, Germany and
| | - Wolfgang S Lieb
- From the Interfaculty Institute of Biochemistry, Department of Molecular Medicine, University of Tübingen, 72076 Tübingen, Germany and
| | - Sebastian Lorscheid
- From the Interfaculty Institute of Biochemistry, Department of Molecular Medicine, University of Tübingen, 72076 Tübingen, Germany and
| | - Stephan Hailfinger
- From the Interfaculty Institute of Biochemistry, Department of Molecular Medicine, University of Tübingen, 72076 Tübingen, Germany and
| | - Klaus Schulze-Osthoff
- From the Interfaculty Institute of Biochemistry, Department of Molecular Medicine, University of Tübingen, 72076 Tübingen, Germany and; the German Cancer Consortium (DKTK) and German Cancer Research Center, 69120 Heidelberg, Germany.
| | - Frank Essmann
- From the Interfaculty Institute of Biochemistry, Department of Molecular Medicine, University of Tübingen, 72076 Tübingen, Germany and.
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25
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Matsumoto M, Nakajima W, Seike M, Gemma A, Tanaka N. Cisplatin-induced apoptosis in non-small-cell lung cancer cells is dependent on Bax- and Bak-induction pathway and synergistically activated by BH3-mimetic ABT-263 in p53 wild-type and mutant cells. Biochem Biophys Res Commun 2016; 473:490-6. [DOI: 10.1016/j.bbrc.2016.03.053] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 03/14/2016] [Indexed: 10/22/2022]
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26
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Dashzeveg N, Yogosawa S, Yoshida K. Transcriptional induction of protein kinase C delta by p53 tumor suppressor in the apoptotic response to DNA damage. Cancer Lett 2016; 374:167-174. [DOI: 10.1016/j.canlet.2016.02.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 01/05/2016] [Accepted: 02/04/2016] [Indexed: 10/22/2022]
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27
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Astaxanthin Inhibits Acetaldehyde-Induced Cytotoxicity in SH-SY5Y Cells by Modulating Akt/CREB and p38MAPK/ERK Signaling Pathways. Mar Drugs 2016; 14:md14030056. [PMID: 26978376 PMCID: PMC4820310 DOI: 10.3390/md14030056] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2015] [Revised: 02/10/2016] [Accepted: 02/17/2016] [Indexed: 12/14/2022] Open
Abstract
Excessive alcohol consumption can lead to brain tissue damage and cognitive dysfunction. Acetaldehyde, the most toxic metabolite of ethanol, mediates the brain tissue damage and cognitive dysfunction induced by chronic excessive alcohol consumption. In this study, the effect of astaxanthin, a marine bioactive compound, on acetaldehyde-induced cytotoxicity was investigated in SH-SY5Y cells. It was found that astaxanthin protected cells from apoptosis by ameliorating the effect of acetaldehyde on the expression of Bcl-2 family proteins, preventing the reduction of anti-apoptotic protein Bcl-2 and the increase of pro-apoptotic protein Bak induced by acetaldehyde. Further analyses showed that astaxanthin treatment inhibited acetaldehyde-induced reduction of the levels of activated Akt and cyclic AMP-responsive element binding protein (CREB). Astaxanthin treatment also prevented acetaldehyde-induced increase of the level of activated p38 mitogen-activated protein kinase (MAPK) and decrease of the level of activated extracellular signal-regulated kinases (ERKs). Activation of Akt/CREB pathway promotes cell survival and is involved in the upregulation of Bcl-2 gene. P38MAPK plays a critical role in apoptotic events while ERKs mediates the inhibition of apoptosis. Thus, astaxanthin may inhibit acetaldehyde-induced apoptosis through promoting the activation of Akt/CREB and ERKs and blocking the activation of p38MAPK. In addition, astaxanthin treatment suppressed the oxidative stress induced by acetaldehyde and restored the antioxidative capacity of SH-SY5Y cells. Therefore, astaxanthin may protect cells against acetaldehyde-induced cytotoxicity through maintaining redox balance and modulating apoptotic and survival signals. The results suggest that astaxanthin treatment may be beneficial for preventing neurotoxicity associated with acetaldehyde and excessive alcohol consumption.
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28
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Chen L, Foreman DP, Sant'Angelo DB, Krangel MS. Yin Yang 1 Promotes Thymocyte Survival by Downregulating p53. THE JOURNAL OF IMMUNOLOGY 2016; 196:2572-82. [PMID: 26843327 DOI: 10.4049/jimmunol.1501916] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 01/07/2016] [Indexed: 12/13/2022]
Abstract
Yin Yang 1 (YY1) is a zinc finger protein that functions as a transcriptional activator or repressor and participates in multiple biological processes, including development and tumorigenesis. To investigate the role of YY1 in developing T cells, we used mouse models that depleted YY1 at two distinct stages of thymocyte development. When YY1 was depleted in CD4(-)CD8(-) double-negative thymocytes, development to the CD4(+)CD8(+) double-positive stage was impaired, due to increased apoptosis that prevented expansion of post-β-selection thymocytes. When YY1 was depleted in double-positive thymocytes, they underwent increased cell-autonomous apoptosis in vitro and displayed a shorter lifespan in vivo, as judged by their ability to undergo secondary Vα-to-Jα recombination. Mechanistically, we found that the increased apoptosis in YY1-deficient thymocytes was attributed to overexpression of p53, because concurrent loss of p53 completely rescued the developmental defects of YY1-deficient thymocytes. These results indicated that YY1 functions as a critical regulator of thymocyte survival and that it does so by suppressing the expression of p53.
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Affiliation(s)
- Liang Chen
- Department of Immunology, Duke University Medical Center, Durham, NC 27710; and
| | - Daniel P Foreman
- Department of Immunology, Duke University Medical Center, Durham, NC 27710; and
| | - Derek B Sant'Angelo
- Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 08901
| | - Michael S Krangel
- Department of Immunology, Duke University Medical Center, Durham, NC 27710; and
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29
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Abstract
The predominant function of the tumor suppressor p53 is transcriptional regulation. It is generally accepted that p53-dependent transcriptional activation occurs by binding to a specific recognition site in promoters of target genes. Additionally, several models for p53-dependent transcriptional repression have been postulated. Here, we evaluate these models based on a computational meta-analysis of genome-wide data. Surprisingly, several major models of p53-dependent gene regulation are implausible. Meta-analysis of large-scale data is unable to confirm reports on directly repressed p53 target genes and falsifies models of direct repression. This notion is supported by experimental re-analysis of representative genes reported as directly repressed by p53. Therefore, p53 is not a direct repressor of transcription, but solely activates its target genes. Moreover, models based on interference of p53 with activating transcription factors as well as models based on the function of ncRNAs are also not supported by the meta-analysis. As an alternative to models of direct repression, the meta-analysis leads to the conclusion that p53 represses transcription indirectly by activation of the p53-p21-DREAM/RB pathway.
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Key Words
- CDE, cell cycle-dependent element
- CDKN1A
- CHR, cell cycle genes homology region
- ChIP, chromatin immunoprecipitation
- DREAM complex
- DREAM, DP, RB-like, E2F4, and MuvB complex
- E2F/RB complex
- HPV, human papilloma virus
- NF-Y, Nuclear factor Y
- cdk, cyclin-dependent kinase
- genome-wide meta-analysis
- p53
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Affiliation(s)
- Martin Fischer
- a Molecular Oncology; Medical School ; University of Leipzig ; Leipzig , Germany
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30
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Witzens-Harig M, Giaisi M, Köhler R, Krammer PH, Li-Weber M. HTLV-1-associated adult T cell leukemia is highly susceptible to Navitoclax due to enhanced Bax expression. Int J Cancer 2015; 138:507-14. [PMID: 26260669 DOI: 10.1002/ijc.29726] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Revised: 07/28/2015] [Accepted: 08/03/2015] [Indexed: 11/09/2022]
Abstract
Over-expression of Bcl-2, Bcl-xL and Bcl-w is frequently associated with cancer resistance to chemotherapy. Navitoclax (ABT-263), an orally bio-available small-molecule mimetic of the Bcl-2 homology domain 3, specifically inhibits Bcl-2, Bcl-xL and Bcl-w. Despite promising results obtained from the clinical trials, the use of Navitoclax in patients is dose-limited due to induction of death of platelets via inhibition of Bcl-xL and subsequent thrombocytopenia. This side effect limits the use of Navitoclax in low doses and to very sensitive tumors. In this study, we show that HTLV-1-associated adult T-cell leukemia/lymphoma (ATL) cells, which over-express Bcl-2, Bcl-xL and Bcl-w, show a 10- to 20-fold higher sensitivity (EC50 = ∼ 25-50 nM) to Navitoclax compared to non-HTLV-1-associated leukemic cells (EC50 = ∼ 1 μM). Investigation of the molecular mechanisms revealed that the HTLV-1 oncogenic protein Tax up-regulates expression of the pro-apoptotic protein Bax which enhances the therapeutic efficacy of Navitoclax. In addition, we show that agents that inhibit the transcription elongation or translation initiation such as Wogonin and Roc-A can further decrease the effective dose of Navitoclax. Our study suggests that HTLV-1 ATL may be a good candidate disease for low dose Navitoclax therapy and probably with less risk of thrombocytopenia.
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Affiliation(s)
- Mathias Witzens-Harig
- Medizinische Klinik V, Hematology, Oncology Und Rheumatology, University Heidelberg, Heidelberg, 69120, Germany
| | - Marco Giaisi
- Tumorimmunology Program (D030), German Cancer Research Center (DKFZ), Heidelberg, D-69120, Germany
| | - Rebecca Köhler
- Tumorimmunology Program (D030), German Cancer Research Center (DKFZ), Heidelberg, D-69120, Germany
| | - Peter H Krammer
- Tumorimmunology Program (D030), German Cancer Research Center (DKFZ), Heidelberg, D-69120, Germany
| | - Min Li-Weber
- Tumorimmunology Program (D030), German Cancer Research Center (DKFZ), Heidelberg, D-69120, Germany
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31
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Dashzeveg N, Yoshida K. Cell death decision by p53 via control of the mitochondrial membrane. Cancer Lett 2015; 367:108-12. [PMID: 26231733 DOI: 10.1016/j.canlet.2015.07.019] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 07/15/2015] [Accepted: 07/18/2015] [Indexed: 12/20/2022]
Abstract
The tumor suppressor p53 is mutated in more than half of human cancers. Recent evidence has revealed that p53 not only regulates apoptosis but also regulates necrotic/necroptotic cell death via the mitochondria. The regulation of apoptosis by p53 is tightly connected to the mitochondrial outer membrane permeabilization and the induction of and interaction with Bcl-2 family members. Interestingly, p53-mediated regulation of necrosis/necroptosis is correlated with mitochondrial permeabilization pore opening via interactions with CypD and Drp1. This review discusses the p53-regulating molecules that induce apoptosis or necrosis/necroptosis via the mitochondria.
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Affiliation(s)
- Nurmaa Dashzeveg
- Department of Biochemistry, Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo 105-8461, Japan
| | - Kiyotsugu Yoshida
- Department of Biochemistry, Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo 105-8461, Japan.
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32
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Lee H, Lee H, Chin H, Kim K, Lee D. ERBB3 knockdown induces cell cycle arrest and activation of Bak and Bax-dependent apoptosis in colon cancer cells. Oncotarget 2015; 5:5138-52. [PMID: 24970817 PMCID: PMC4148128 DOI: 10.18632/oncotarget.2094] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
ERBB3 is an emerging target for cancer therapy among the EGFR family. Contrary to resistance against EGFR and ERBB2 targeting, the genetic inhibition of ERBB3 results in anti-tumorigenic in HCT116 colon cancer cells harboring constitutively active KRAS and PIK3CA mutations. Still, the anti-tumorigenic molecular mechanism has not been defined. We demonstrated in this study that ERBB3 knockdown resulted in cell cycle arrest and activation of Bak and Bax-dependent apoptosis. Apoptosis was irrelevant to the majority of BH3-only pro-apoptotic proteins and correlated with the transcriptional upregulation of Bak and p53-dependent Bax translocation. Treatment with LY294002, a PI3K inhibitor, resulted in cell cycle arrest without apoptosis and a concomitant down-regulation of cap-dependent translation by the suppression of the PI3K/AKT/mTOR pathway. However, the inhibition of cap-dependent translation by ERBB3 knockdown occurred without altering the PI3K/AKT/mTOR pathway. In addition, ERBB3 knockdown-induced cell cycle arrest was observed in most colon cancer cells but was accompanied by apoptosis in p53 wild-type cells. These results indicate that ERBB3 is a potential target for EGFR- and ERBB2-resistant colon cancer therapy.
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Affiliation(s)
- Hyunji Lee
- Department of Life Science Ewha Womans University, Seoul, S. Korea
| | - Hyunjung Lee
- Department of Life Science Ewha Womans University, Seoul, S. Korea
| | - Hyunjung Chin
- Department of Life Science Ewha Womans University, Seoul, S. Korea
| | - Kyoungmi Kim
- Department of Life Science Ewha Womans University, Seoul, S. Korea
| | - Daekee Lee
- Department of Life Science Ewha Womans University, Seoul, S. Korea. GT5 program, Ewha Womans University, Seoul, S. Korea
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33
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Overexpression of ankyrin repeat domain 1 enhances cardiomyocyte apoptosis by promoting p53 activation and mitochondrial dysfunction in rodents. Clin Sci (Lond) 2015; 128:665-78. [PMID: 25511237 DOI: 10.1042/cs20140586] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The Ankrd1 (ankyrin repeat domain 1) gene is known to be up-regulated in heart failure and acts as a co-activator of p53, modulating its transcriptional activity, but it remains inconclusive whether this gene promotes or inhibits cell apoptosis. In the present study, we attempted to investigate the role of Ankrd1 on AngII (angiotensin II)- or pressure-overload-induced cardiomyocyte apoptosis. In the failing hearts of mice with pressure overload, the protein expression of Ankrd1-encoded CARP (cardiac ankyrin repeat protein) was significantly increased. In NRCs (neonatal rat cardiomyocytes), AngII increased the expression of Ankrd1 and CARP. In the presence of AngII in NRCs, infection with a recombinant adenovirus containing rat Ankrd1 cDNA (Ad-Ankrd1) enhanced the mitochondrial translocation of Bax and phosphorylated p53, increased mitochondrial permeability and cardiomyocyte apoptosis, and reduced cell viability, whereas these effects were antagonized by silencing of Ankrd1. Intra-myocardial injection of Ad-Ankrd1 in mice with TAC (transverse aortic constriction) markedly exacerbated cardiac dysfunction with an increase in the lung weight/body weight ratio and a decrease in left ventricular fractional shortening. Cardiomyocyte apoptosis and the expression of phosphorylated p53 were also significantly increased in Ad-Ankrd1-infected TAC mice, whereas knockdown of Ankrd1 significantly inhibited the apoptotic signal pathway as well as cardiomyocyte apoptosis in pressure-overload mice. These findings indicate that overexpression of Ankrd1 exacerbates pathological cardiac dysfunction through enhancement of cardiomyocyte apoptosis mediated by the up-regulation of p53.
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34
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Xiang Z, Qu F, Wang F, Xiao S, Jun L, Zhang Y, Yu Z. ChBax/Bak as key regulators of the mitochondrial apoptotic pathway: cloned and characterized in Crassostrea hongkongensis. FISH & SHELLFISH IMMUNOLOGY 2015; 42:225-232. [PMID: 25463302 DOI: 10.1016/j.fsi.2014.11.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 11/07/2014] [Accepted: 11/12/2014] [Indexed: 06/04/2023]
Abstract
Apoptosis has been primarily investigated in mammals, and little is known about apoptosis in mollusks. The proteins Bax and Bak play critical roles in the mitochondrial apoptosis pathway and in determining cell fate. In this study, ChBax and ChBak, homologs of the well-known Bax and Bak proteins, were identified from the oyster Crassostrea hongkongensis. The ChBax/Bak proteins consist of 207/232 amino acids with the typical domains found in BCL-2 family members. ChBax and ChBak mRNA expression were detected in all 8 of the selected oyster tissues and at the different stages of development. Fluorescence microscopy revealed that the full-length proteins of ChBax/Bak were located in the cytoplasm and mitochondrial outer membrane, of HEK293T cells, respectively. Furthermore, both of the genes' expression levels were found to increase in the hemocytes of oysters challenged with pathogens. The over-expression of ChBax or ChBak activates the p53-Luc reporter gene in HEK293T cells in a dose-dependent manner. These results indicate that ChBax and ChBak may play important roles in the mitochondrial apoptotic pathway in oysters.
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Affiliation(s)
- Zhiming Xiang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, Guangdong, China
| | - Fufa Qu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, Guangdong, China; University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Fuxuan Wang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, Guangdong, China; University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Shu Xiao
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, Guangdong, China
| | - Li Jun
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, Guangdong, China
| | - Yang Zhang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, Guangdong, China
| | - Ziniu Yu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, Guangdong, China.
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Apoptosis resistance, mitotic catastrophe, and loss of ploidy control in Burkitt lymphoma. J Mol Med (Berl) 2014; 93:559-72. [PMID: 25548804 DOI: 10.1007/s00109-014-1242-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Revised: 10/16/2014] [Accepted: 12/14/2014] [Indexed: 01/18/2023]
Abstract
UNLABELLED Resistance to cell death is the major cause of chemotherapy failure in most kinds of cancers, including Burkitt lymphoma (BL). When analyzing therapy resistance in Burkitt lymphoma (BL), we discovered a link between apoptosis resistance and ploidy control. We therefore studied systematically a panel of 15 BL lines for apoptosis induction upon treatment with microtubule inhibitors and compared three types of microtubule toxins, i.e., paclitaxel, nocodazole and vincristine. We found an inverse relationship between apoptosis sensitivity and ploidy control. Thus, cells resistant to paclitaxel- or nocodazole-induced apoptosis underwent mitotic catastrophe and developed polyploidy (>4N). Mechanistically, apoptosis resistance was linked to failure of caspase activation, which was most pronounced in cells lacking the pro-apoptotic multidomain Bcl-2 homologs Bax and Bak. Pharmacological caspase inhibition promoted polyploidy upon exposure to paclitaxel and nocodazole supporting the relationship between resistance to apoptosis and polyploidization. Of note, vincristine induced persistent mitotic arrest but no loss of ploidy control. Considering targets to facilitate Bax/Bak-independent cell death and to avoid drug-induced mitotic catastrophe and consecutive mitotic catastrophe should be of great importance to overcome therapy resistance and therapy-related events that result in ploidy changes and tumor progression. KEY MESSAGE Inverse relation of apoptosis and polyploidy induction by paclitaxel or nocodazole in BL. Resistant cells undergo mitotic catastrophe and develop polyploidy. Lack of Bax/Bak confers resistance and leads to induction of polyploidy in BL. Intact apoptosis response protects from polyploidy as a result of mitotic catastrophe.
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Tang W, Xue R, Weng S, Wu J, Fang Y, Wang Y, Ji L, Hu T, Liu T, Huang X, Chen S, Shen X, Zhang S, Dong L. BIRC6 promotes hepatocellular carcinogenesis: interaction of BIRC6 with p53 facilitating p53 degradation. Int J Cancer 2014; 136:E475-87. [PMID: 25196217 DOI: 10.1002/ijc.29194] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2014] [Revised: 08/17/2014] [Accepted: 09/03/2014] [Indexed: 12/20/2022]
Abstract
The genes that encode inhibitor of apoptosis proteins (IAPs) are frequently overexpressed in human cancers. However, the expression pattern and clinical significance of BIRC6, a member of IAPs, in hepatocellular carcinoma (HCC) remains unclear. Here we investigated the role of BIRC6 in hepatocellular carcinogenesis. We used immunoblot and immunochemical analyses to determine the levels of BIRC6 in 7 hepatoma cell lines and 160 HCC specimens. We evaluated the proognostic value of BIRC6 expression and its association with clinical parameters. A lentivirus-mediated silencing method was used to knockdown BIRC6, and the biological consequences of BIRC6 silencing in three hepatoma cell lines were investigated in vitro and in vivo. We found that BIRC6 overexpression was significantly correlated with serum ALT level and HCC vascular invasion. Patients with positive BIRC6 expression in tumor tissue had a poor survival and a high rate of recurrence. BIRC6 knockdown remarkably suppressed cell proliferation, caused G1/S arrest and sensitized hepatoma cells to sorafenib-induced apoptosis in hepatoma cells, which was partly reversed by RNA interference targeting p53. The mechanistic study revealed that BIRC6 interacted with p53 and facilitated its degradation. The in vivo study showed that BIRC6 knockdown inhibited xenograft tumor growth and increased the sensitivity of tumor cells to sorafenib in nude mice. Taken together, these findings demonstrate that BIRC6 overexpression in HCC specimens is indicative of poor prognosis and that its interaction with p53 facilitates the degradation of p53, leading to carcinogenesis and an anti-apoptotic status.
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Affiliation(s)
- Wenqing Tang
- Department of Gastroenterology and Hepatology, Zhongshan Hospital, Shanghai, Institute of Liver Disease, Fudan University, Shanghai, China
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Candi E, Agostini M, Melino G, Bernassola F. How the TP53 family proteins TP63 and TP73 contribute to tumorigenesis: regulators and effectors. Hum Mutat 2014; 35:702-14. [PMID: 24488880 DOI: 10.1002/humu.22523] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Accepted: 01/12/2014] [Indexed: 12/23/2022]
Abstract
In mammals, the p53 family comprises two additional members, p63 and p73 (hereafter referred to as TP53, TP63, and TP73, respectively). The usage of two alternative promoters produces protein variants either with (transactivating [TA] isoforms) or without (ΔN isoforms) the N-terminal transactivation domain (TAD). In general, the TA proteins exert TP53-like tumor-suppressive activities through their ability to activate a common set of target genes. The ΔN proteins can act as dominant-negative inhibitors of the transcriptionally active family members. Additionally, they possess intrinsic-specific biological activities due to the presence of alternative TADs, and as a result of engaging a different set of regulators. This review summarizes the current understanding of upstream regulators and downstream effectors of the TP53 family proteins, with particular emphasis on those that are relevant for their role in tumorigenesis. Furthermore, we highlight the existence of networks and cross-talks among the TP53 family members, their modulators, as well as the transcriptional targets.
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Affiliation(s)
- Eleonora Candi
- Department of Experimental Medicine and Surgery, University of Rome Tor Vergata, Rome, 00133, Italy
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38
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Sengupta D, Chowdhury KD, Sarkar A, Paul S, Sadhukhan GC. Berberine and S allyl cysteine mediated amelioration of DEN+CCl4 induced hepatocarcinoma. Biochim Biophys Acta Gen Subj 2014; 1840:219-44. [DOI: 10.1016/j.bbagen.2013.08.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 08/14/2013] [Accepted: 08/26/2013] [Indexed: 02/07/2023]
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39
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Thompson MR, Xu D, Williams BR. Activating Transcription Factor 3 Contributes to Toll-Like Receptor-Mediated Macrophage Survival via Repression ofBaxandBak. J Interferon Cytokine Res 2013; 33:682-93. [DOI: 10.1089/jir.2013.0007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Matthew R. Thompson
- Monash Institute of Medical Research, Monash University, Clayton, Victoria, Australia
| | - Dakang Xu
- Monash Institute of Medical Research, Monash University, Clayton, Victoria, Australia
| | - Bryan R.G. Williams
- Monash Institute of Medical Research, Monash University, Clayton, Victoria, Australia
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Velletri T, Romeo F, Tucci P, Peschiaroli A, Annicchiarico-Petruzzelli M, Niklison-Chirou MV, Amelio I, Knight RA, Mak TW, Melino G, Agostini M. GLS2 is transcriptionally regulated by p73 and contributes to neuronal differentiation. Cell Cycle 2013; 12:3564-73. [PMID: 24121663 DOI: 10.4161/cc.26771] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The amino acid Glutamine is converted into Glutamate by a deamidation reaction catalyzed by the enzyme Glutaminase (GLS). Two isoforms of this enzyme have been described, and the GLS2 isoform is regulated by the tumor suppressor gene p53. Here, we show that the p53 family member TAp73 also drives the expression of GLS2. Specifically, we demonstrate that TAp73 regulates GLS2 during retinoic acid-induced terminal neuronal differentiation of neuroblastoma cells, and overexpression or inhibition of GLS2 modulates neuronal differentiation and intracellular levels of ATP. Moreover, inhibition of GLS activity, by removing Glutamine from the growth medium, impairs in vitro differentiation of cortical neurons. Finally, expression of GLS2 increases during mouse cerebellar development. Although, p73 is dispensable for the in vivo expression of GLS2, TAp73 loss affects GABA and Glutamate levels in cortical neurons. Together, these findings suggest a role for GLS2 acting, at least in part, downstream of p73 in neuronal differentiation and highlight a possible role of p73 in regulating neurotransmitter synthesis.
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Affiliation(s)
- Tania Velletri
- Medical Research Council; Toxicology Unit; Leicester University; Leicester, UK; Institute of Health Sciences; Shanghai Institutes for Biological Sciences; Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine; Shanghai, China
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41
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Terfenadine induces anti-proliferative and apoptotic activities in human hormone-refractory prostate cancer through histamine receptor-independent Mcl-1 cleavage and Bak up-regulation. Naunyn Schmiedebergs Arch Pharmacol 2013; 387:33-45. [PMID: 24048439 DOI: 10.1007/s00210-013-0912-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2013] [Accepted: 08/28/2013] [Indexed: 12/27/2022]
Abstract
Although the results of several studies have underscored the regulatory effect of H1-histamine receptors in cell proliferation of some cancer cell types, its effect in prostate cancers remains unclear. We have therefore studied the effect of terfenadine (an H1-histamine receptor antagonist) in prostate cancer cell lines. Our data demonstrate that terfenadine was effective against PC-3 and DU-145 cells (two prostate cancer cell lines). In contrast, based on the sulforhodamine B assay, loratadine had less potency while fexofenadine and diphenhydramine had little effect. Terfenadine induced the cleavage of Mcl-1 cleavage into a pro-apoptotic 28-kDa fragment and up-regulation of Bak, resulting in the loss of mitochondrial membrane potential (ΔΨm) and the release of cytochrome c and apoptosis-inducing factor into the cytosol. The activation of caspase cascades was detected to be linked to terfenadine action. Bak up-regulation was also examined at both the transcriptional and translational levels, and Bak activation was validated based on conformational change to expose the N terminus. Terfenadine also induced an indirect-but not direct-DNA damage response through the cleavage and activation of caspase-2, phosphorylation and activation of Chk1 and Chk2 kinases, phosphorylation of RPA32 and acetylation of Histone H3; these processes were highly correlated to severe mitochondrial dysfunction and the activation of caspase cascades. In conclusion, terfenadine induced apoptotic signaling cascades against HRPCs in a sequential manner. The exposure of cells to terfenadine caused the up-regulation and activation of Bak and the cleavage of Mcl-1, leading to the loss of ΔΨm and activation of caspase cascades which further resulted in DNA damage response and cell apoptosis.
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Abstract
P73 is a member of the p53 transcription factors family with a prominent role in neurobiology, affecting brain development as well as controlling neuronal survival. Accordingly, p73 has been identified as key player in many age-related neurodegenerative diseases, such as Alzheimer's disease, neuroAIDS and Niemann-Pick type C disease. Here we investigate possible correlations of p73 with Parkinson disease. Tyrosine hydroxylase is a crucial player in Parkinson disease being the enzyme necessary for dopamine synthesis. In this work we show that levels of tyrosine hydroxylase can be influenced by p73. We also demonstrate that p73 can protect against tyrosine hydroxylase depletion in an in vitro model of Parkinson disease.
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Affiliation(s)
- Francesca Grespi
- Medical Research Council, Toxicology Unit, Leicester University, Leicester LE1 9HN, UK
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43
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Bogdał MN, Hat B, Kochańczyk M, Lipniacki T. Levels of pro-apoptotic regulator Bad and anti-apoptotic regulator Bcl-xL determine the type of the apoptotic logic gate. BMC SYSTEMS BIOLOGY 2013; 7:67. [PMID: 23883471 PMCID: PMC3750306 DOI: 10.1186/1752-0509-7-67] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Accepted: 07/11/2013] [Indexed: 01/25/2023]
Abstract
BACKGROUND Apoptosis is a tightly regulated process: cellular survive-or-die decisions cannot be accidental and must be unambiguous. Since the suicide program may be initiated in response to numerous stress stimuli, signals transmitted through a number of checkpoints have to be eventually integrated. RESULTS In order to analyze possible mechanisms of the integration of multiple pro-apoptotic signals, we constructed a simple model of the Bcl-2 family regulatory module. The module collects upstream signals and processes them into life-or-death decisions by employing interactions between proteins from three subgroups of the Bcl-2 family: pro-apoptotic multidomain effectors, pro-survival multidomain restrainers, and pro-apoptotic single domain BH3-only proteins. Although the model is based on ordinary differential equations (ODEs), it demonstrates that the Bcl-2 family module behaves akin to a Boolean logic gate of the type dependent on levels of BH3-only proteins (represented by Bad) and restrainers (represented by Bcl-xL). A low level of pro-apoptotic Bad or a high level of pro-survival Bcl-xL implies gate AND, which allows for the initiation of apoptosis only when two stress stimuli are simultaneously present: the rise of the p53 killer level and dephosphorylation of kinase Akt. In turn, a high level of Bad or a low level of Bcl-xL implies gate OR, for which any of these stimuli suffices for apoptosis. CONCLUSIONS Our study sheds light on possible signal integration mechanisms in cells, and spans a bridge between modeling approaches based on ODEs and on Boolean logic. In the proposed scheme, logic gates switching results from the change of relative abundances of interacting proteins in response to signals and involves system bistability. Consequently, the regulatory system may process two analogous inputs into a digital survive-or-die decision.
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Affiliation(s)
- Marta N Bogdał
- Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw 02-106, Poland
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44
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Pintus F, Floris G, Rufini A. Nutrient availability links mitochondria, apoptosis, and obesity. Aging (Albany NY) 2013; 4:734-41. [PMID: 23211444 PMCID: PMC3560440 DOI: 10.18632/aging.100505] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Mitochondria are the dominant source of the cellular energy requirements through oxidative phosphorylation, but they are also central players in apoptosis. Nutrient availability may have been the main evolutionary driving force behind these opposite mitochondrial functions: production of energy to sustain life and release of apoptotic proteins to trigger cell death. Here, we explore the link between nutrients, mitochondria and apoptosis with known and potential implications for age-related decline and metabolic syndromes.
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Affiliation(s)
- Francesca Pintus
- Medical Research Council, Toxicology Unit/University of Leicester, LE1 1QH, Leicester UK
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Celardo I, Grespi F, Antonov A, Bernassola F, Garabadgiu AV, Melino G, Amelio I. Caspase-1 is a novel target of p63 in tumor suppression. Cell Death Dis 2013; 4:e645. [PMID: 23703390 PMCID: PMC3674380 DOI: 10.1038/cddis.2013.175] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
p63 is a p53 family transcription factor, which besides unique roles in epithelial development, shares tumor suppressive activity with its homolog p53. The p63 gene has different transcriptional start sites, which generate two N-terminal isoforms (transactivation domain (TA)p63 and amino terminal truncated protein(ΔN)p63); in addition alternative splicing at the 5′-end give rise to at least five C-terminal isoforms. This complexity of gene structure has probably fostered the debate and controversy on p63 function in cancer, with TP63-harboring two distinctive promoters, codifying for the TAp63 and ΔNp63 isoforms, and having discrete functions. However, ΔNp63 also drives expression of target genes that have a relevant role in cancer and metastasis. In this study, we identified a novel p63 transcriptional target, caspase-1. Caspase-1 is proinflammatory caspase, which functions in tumor suppression. We show that both p63 isoforms promote caspase-1 expression by physical binding to its promoter. Consistent with our in vitro findings, we also identified a direct correlation between p63 and caspase-1 expression in human cancer data sets. In addition, survival estimation analysis demonstrated that functional interaction between p63 and caspase-1 represents a predictor of positive survival outcome in human cancers. Overall, our data report a novel p63 target gene involved in tumor suppression, and the clinical analysis underlines the biological relevance of this finding and suggests a further clinically predictive biomarker.
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Affiliation(s)
- I Celardo
- Medical Research Council, Toxicology Unit, Leicester University, Leicester, UK
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Hildebrand DG, Alexander E, Hörber S, Lehle S, Obermayer K, Münck NA, Rothfuss O, Frick JS, Morimatsu M, Schmitz I, Roth J, Ehrchen JM, Essmann F, Schulze-Osthoff K. IκBζ is a transcriptional key regulator of CCL2/MCP-1. THE JOURNAL OF IMMUNOLOGY 2013; 190:4812-20. [PMID: 23547114 DOI: 10.4049/jimmunol.1300089] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
CCL2, also referred to as MCP-1, is critically involved in directing the migration of blood monocytes to sites of inflammation. Consequently, excessive CCL2 secretion has been linked to many inflammatory diseases, whereas a lack of expression severely impairs immune responsiveness. We demonstrate that IκBζ, an atypical IκB family member and transcriptional coactivator required for the selective expression of a subset of NF-κB target genes, is a key activator of the Ccl2 gene. IκBζ-deficient macrophages exhibited impaired secretion of CCL2 when challenged with diverse inflammatory stimuli, such as LPS or peptidoglycan. These findings were reflected at the level of Ccl2 gene expression, which was tightly coupled to the presence of IκBζ. Moreover, mechanistic insights acquired by chromatin immunoprecipitation demonstrate that IκBζ is directly recruited to the proximal promoter region of the Ccl2 gene and is required for transcription-enhancing histone H3 at lysine-4 trimethylation. Finally, IκBζ-deficient mice showed significantly impaired CCL2 secretion and monocyte infiltration in an experimental model of peritonitis. Together, these findings suggest a distinguished role of IκBζ in mediating the targeted recruitment of monocytes in response to local inflammatory events.
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Affiliation(s)
- Dominic G Hildebrand
- Interfaculty Institute for Biochemistry, Eberhard Karls University, D-72076 Tübingen, Germany
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Alexander E, Hildebrand DG, Kriebs A, Obermayer K, Manz M, Rothfuss O, Essmann F, Schulze-Osthoff K. IκBζ is a regulator for the senescence-associated secretory phenotype in DNA damage- and oncogene-induced senescence. J Cell Sci 2013; 126:3738-45. [DOI: 10.1242/jcs.128835] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Cellular senescence, a state of sustained cell cycle arrest, has been identified as an important anti-tumor barrier. Senescent cells secrete various growth factors and cytokines, such as IL6 and IL8, which collectively constitute the senescence-associated secretory phenotype (SASP). The SASP can signal to the tumor environment and elicit the immune-mediated clearance of tumor cells or, depending on the context, could potentially promote tumor progression. Despite the importance of the SASP to tumor biology, its regulation remains rather unknown. Here, we show that IκBζ, an atypical member of the inhibitor of NFκB proteins and selective coactivator of particular NFκB target genes, is an important regulator of SASP expression. Several models of DNA damage- and oncogene-induced senescence revealed a robust induction of IκBζ expression. RNAi-mediated knockdown of IκBζ impaired IL6 and IL8 expression, whereas exogenous IκBζ expression resulted in enhanced SASP cytokine expression. Importantly, during senescence of IκBζ knockout cells induction of IL6 and IL8 but not of the cell cycle inhibitor p21WAF/CIP1 was completely abolished. Thus, we propose a distinguished and hitherto unappreciated role of IκBζ for SASP formation in both DNA damage- and oncogene-induced senescence.
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48
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Abstract
p63 is a transcriptional factor implicated in cancer and development. The presence in TP63 gene of alternative promoters allows expression of one isoform containing the N-terminal transactivation domain (TA isoform) and one N-terminal truncated isoform (ΔN isoform). Complete ablation of all p63 isoforms produced mice with fatal developmental abnormalities, including lack of epidermal barrier, limbs and other epidermal appendages. Specific TAp63-null mice, although they developed normally, failed to undergo in DNA damage-induced apoptosis during primordial follicle meiotic arrest, suggesting a p63 involvement in maternal reproduction. Recent findings have elucidated the role in DNA damage response of a novel Hominidae p63 isoform, GTAp63, specifically expressed in human spermatic precursors. Thus, these findings suggest a unique strategy of p63 gene, to evolve in order to preserve the species as a guardian of reproduction. Elucidation of the biological basis of p63 function in reproduction may provide novel approaches to the control of human fertility.
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Affiliation(s)
- Ivano Amelio
- Medical Research Council; Toxicology Unit; Leicester University; Leicester, UK
- Department for Molecular Biomedical Research; VIB; Ghent University; Ghent, Belgium
- Department of Biomedical Molecular Biology; Ghent University; Ghent, Belgium
| | - Francesca Grespi
- Medical Research Council; Toxicology Unit; Leicester University; Leicester, UK
- Department for Molecular Biomedical Research; VIB; Ghent University; Ghent, Belgium
- Department of Biomedical Molecular Biology; Ghent University; Ghent, Belgium
| | | | - Gerry Melino
- Medical Research Council; Toxicology Unit; Leicester University; Leicester, UK
- Department for Molecular Biomedical Research; VIB; Ghent University; Ghent, Belgium
- Department of Biomedical Molecular Biology; Ghent University; Ghent, Belgium
- Biochemistry IDI-IRCCS Laboratory and Department of Experimental Medicine and Surgery; University of Rome “Tor Vergata;” Rome, Italy
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49
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Grespi F, Amelio I, Tucci P, Annicchiarico-Petruzzelli M, Melino G. Tissue-specific expression of p73 C-terminal isoforms in mice. Cell Cycle 2012; 11:4474-83. [PMID: 23159862 PMCID: PMC3552929 DOI: 10.4161/cc.22787] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
p73 is a p53 family transcription factor. Due to the presence in the 5' flanking region of two promoters, there are two N-terminal variants, TAp73, which retains a fully active transactivation domain (TA), and ΔNp73, in which the N terminus is truncated. In addition, extensive 3' splicing gives rise to at least seven distinctive isoforms; TAp73-selective knockout highlights its role as a regulator of cell death, senescence and tumor suppressor. ΔNp73-selective knockout, on the other hand, highlights anti-apoptotic function of ΔNp73 and its involvement in DNA damage response. In this work, we investigated the expression pattern of murine p73 C-terminal isoforms. By using a RT-PCR approach, we were able to detect mRNAs of all the C-terminal isoforms described in humans. We characterized their in vivo expression profile in mouse organs and in different mouse developmental stages. Finally, we investigated p73 C-terminal expression profile following DNA damage, ex vivo after primary cultures treatment and in vivo after systemic administration of cytotoxic compounds. Overall, our study first elucidates spatio-temporal expression of mouse p73 isoforms and provides novel insights on their expression-switch under triggered conditions.
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Affiliation(s)
- Francesca Grespi
- Medical Research Council, Toxicology Unit, Leicester University, Leicester, UK
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50
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Tucci P. Caloric restriction: is mammalian life extension linked to p53? Aging (Albany NY) 2012; 4:525-34. [PMID: 22983298 PMCID: PMC3461340 DOI: 10.18632/aging.100481] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Accepted: 08/21/2012] [Indexed: 12/21/2022]
Abstract
Caloric restriction, that is limiting food intake, is recognized in mammals as the best characterized and most reproducible strategy for extending lifespan, retarding physiological aging and delaying the onset of age-associated diseases. The aim of this mini review is to argue that p53 is the connection in the abilities of both the Sirt-1 pathway and the TOR pathway to impact on longevity of cells and organisms. This novel, lifespan regulating function of p53 may be evolutionarily more ancient than its relatively recent role in apoptosis and tumour suppression, and is likely to provide many new insights into lifespan modulation.
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Affiliation(s)
- Paola Tucci
- Medical Research Council, Toxicology Unit, Leicester University, Leicester LE1 9HN, UK.
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