1
|
Tao Y, Dai L, Liang W, Li X, Lyu Y, Li J, Li Z, Shi Z, Liang X, Zhou S, Fu X, Hu W, Wang X. Advancements and perspectives of RBX2 as a molecular hallmark in cancer. Gene 2024; 892:147864. [PMID: 37820940 DOI: 10.1016/j.gene.2023.147864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 09/18/2023] [Accepted: 09/29/2023] [Indexed: 10/13/2023]
Abstract
Cancer is a challenging issue for human health. One of the key methods to address this issue is by comprehending the molecular causes of tumors and creating medications that target those causes. RBX2 (RING box protein 2), also known as ROC2 (Regulator of Cullins 2), RNF7 (RING Finger Protein 7), or SAG (Sensitive to Apoptosis Gene) is a key component of the Cullin-RING-type E3 ubiquitin ligases (CRLs) and overexpressed in various human cancers. RBX2 is a potential drug target, the expression of which correlates with tumor staging, grading, and prognosis analysis. Through a synergistically biological interaction with Kras mutation in preclinical models, RBX2 accelerated the progression of skin cancer, pancreatic cancer, and lung cancer. In accordance, the aberrant expression of RBX2 will lead to dysregulation of many signaling pathways, which is crucial for tumor initiation and growth. However, the impact of RBX2 on tumors also intriguingly demonstrates a spatial reliance manner. In this review, we summarized the current understanding of RBX2 in multiple cancer types and suggested a significant potential of RBX2 as a therapeutic target.
Collapse
Affiliation(s)
- Yiran Tao
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, PR China; Henan International Joint Laboratory of Glioma Metabolism and Microenvironment Research, Zhengzhou, Henan, PR China
| | - Lirui Dai
- Department of Neurosurgery, Pituitary Adenoma Multidisciplinary Center, West China Hospital of Sichuan University, Chengdu 610041, Sichuan, China
| | - Wulong Liang
- Henan International Joint Laboratory of Glioma Metabolism and Microenvironment Research, Zhengzhou, Henan, PR China
| | - Xiang Li
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, PR China; Henan International Joint Laboratory of Glioma Metabolism and Microenvironment Research, Zhengzhou, Henan, PR China
| | - Yuan Lyu
- Henan International Joint Laboratory of Glioma Metabolism and Microenvironment Research, Zhengzhou, Henan, PR China; Medical Research Center, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, PR China; Institute of Neuroscience, Zhengzhou University, Zhengzhou, Henan 450052, PR China
| | - Junqi Li
- Henan International Joint Laboratory of Glioma Metabolism and Microenvironment Research, Zhengzhou, Henan, PR China; Medical Research Center, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, PR China; Institute of Neuroscience, Zhengzhou University, Zhengzhou, Henan 450052, PR China
| | - Zian Li
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, PR China; Henan International Joint Laboratory of Glioma Metabolism and Microenvironment Research, Zhengzhou, Henan, PR China
| | - Zimin Shi
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, PR China; Henan International Joint Laboratory of Glioma Metabolism and Microenvironment Research, Zhengzhou, Henan, PR China
| | - Xianyin Liang
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, PR China; Henan International Joint Laboratory of Glioma Metabolism and Microenvironment Research, Zhengzhou, Henan, PR China
| | - Shaolong Zhou
- Henan International Joint Laboratory of Glioma Metabolism and Microenvironment Research, Zhengzhou, Henan, PR China
| | - Xudong Fu
- Henan International Joint Laboratory of Glioma Metabolism and Microenvironment Research, Zhengzhou, Henan, PR China
| | - Weihua Hu
- Henan International Joint Laboratory of Glioma Metabolism and Microenvironment Research, Zhengzhou, Henan, PR China
| | - Xinjun Wang
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, PR China; Henan International Joint Laboratory of Glioma Metabolism and Microenvironment Research, Zhengzhou, Henan, PR China.
| |
Collapse
|
2
|
To KKW, Chow JCH, Cheung KM, Cho WCS. Circumvention of Gefitinib Resistance by Repurposing Flunarizine via Histone Deacetylase Inhibition. ACS Pharmacol Transl Sci 2023; 6:1531-1543. [PMID: 37854628 PMCID: PMC10580381 DOI: 10.1021/acsptsci.3c00202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Indexed: 10/20/2023]
Abstract
Gefitinib is an epidermal growth factor receptor tyrosine kinase inhibitor (EGFR TKI) for treating advanced non-small cell lung cancer (NSCLC). However, drug resistance seriously impedes the clinical efficacy of gefitinib. This study investigated the repositioning of the non-oncology drug capable of inhibiting histone deacetylases (HDACs) to overcome gefitinib resistance. A few drug candidates were identified using the in silico repurposing tool "DRUGSURV" and tested for HDAC inhibition. Flunarizine, originally indicated for migraine prophylaxis and vertigo treatment, was selected for detailed investigation in NSCLC cell lines harboring a range of different gefitinib resistance mechanisms (EGFR T790M, KRAS G12S, MET amplification, or PTEN loss). The circumvention of gefitinib resistance by flunarizine was further demonstrated in an EGFR TKI (erlotinib)-refractory patient-derived tumor xenograft (PDX) model in vivo. The acetylation level of cellular histone protein was increased by flunarizine in a concentration- and time-dependent manner. Among the NSCLC cell lines evaluated, the extent of gefitinib resistance circumvention by flunarizine was found to be the most pronounced in EGFR T790M-bearing H1975 cells. The gefitinib-flunarizine combination was shown to induce the apoptotic protein Bim but reduce the antiapoptotic protein Bcl-2, which apparently circumvented gefitinib resistance. The induction of Bim by flunarizine was accompanied by an increase in the histone acetylation and E2F1 interaction with the BIM gene promoter. Flunarizine was also found to upregulate E-cadherin but downregulate the vimentin expression, which subsequently inhibited cancer cell migration and invasion. Importantly, flunarizine was also shown to significantly potentiate the tumor growth suppressive effect of gefitinib in EGFR TKI-refractory PDX in vivo. The findings advocate for the translational application of flunarizine to circumvent gefitinib resistance in the clinic.
Collapse
Affiliation(s)
- Kenneth K. W. To
- School
of Pharmacy, Faculty of Medicine, The Chinese
University of Hong Kong, Hong Kong, SAR, China
| | - James C. H. Chow
- Department
of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong, SAR, China
| | - Ka-Man Cheung
- Department
of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong, SAR, China
| | - William C. S. Cho
- Department
of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong, SAR, China
| |
Collapse
|
3
|
Sakanyan V, Iradyan N, Alves de Sousa R. Targeted Strategies for Degradation of Key Transmembrane Proteins in Cancer. BIOTECH 2023; 12:57. [PMID: 37754201 PMCID: PMC10526213 DOI: 10.3390/biotech12030057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 07/26/2023] [Accepted: 07/30/2023] [Indexed: 09/28/2023] Open
Abstract
Targeted protein degradation is an attractive technology for cancer treatment due to its ability to overcome the unpredictability of the small molecule inhibitors that cause resistance mutations. In recent years, various targeted protein degradation strategies have been developed based on the ubiquitin-proteasome system in the cytoplasm or the autophagy-lysosomal system during endocytosis. In this review, we describe and compare technologies for the targeted inhibition and targeted degradation of the epidermal growth factor receptor (EGFR), one of the major proteins responsible for the onset and progression of many types of cancer. In addition, we develop an alternative strategy, called alloAUTO, based on the binding of new heterocyclic compounds to an allosteric site located in close proximity to the EGFR catalytic site. These compounds cause the targeted degradation of the transmembrane receptor, simultaneously activating both systems of protein degradation in cells. Damage to the EGFR signaling pathways promotes the inactivation of Bim sensor protein phosphorylation, which leads to the disintegration of the cytoskeleton, followed by the detachment of cancer cells from the extracellular matrix, and, ultimately, to cancer cell death. This hallmark of targeted cancer cell death suggests an advantage over other targeted protein degradation strategies, namely, the fewer cancer cells that survive mean fewer chemotherapy-resistant mutants appear.
Collapse
Affiliation(s)
- Vehary Sakanyan
- Faculté de Pharmacie, Université de Nantes, 44035 Nantes, France
- ProtNeteomix, 29 rue de Provence, 44700 Orvault, France
| | - Nina Iradyan
- Institute of Fine Organic Chemistry after A. Mnjoyan, National Academy of Sciences of the Republic of Armenia, Yerevan 0014, Armenia;
| | - Rodolphe Alves de Sousa
- Faculté des Sciences Fondamentales et Biomédicales, Université Paris Descartes, UMR 8601, CBMIT, 75006 Paris, France;
| |
Collapse
|
4
|
Wang H, Chen Y, Yuan Q, Chen L, Dai P, Li X. HRK inhibits colorectal cancer cells proliferation by suppressing the PI3K/AKT/mTOR pathway. Front Oncol 2022; 12:1053510. [PMID: 36568155 PMCID: PMC9769574 DOI: 10.3389/fonc.2022.1053510] [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: 09/25/2022] [Accepted: 11/23/2022] [Indexed: 12/13/2022] Open
Abstract
Background As one of the most common malignant tumor, colorectal cancer (CRC) continues to have a high incidence and mortality rate. HRK belongs to the BCL-2 protein family, which has been shown to have antitumor effects in prostate cancer. However, its role in colorectal cancer is not yet known. Methods In this study, we verified the expression levels of HRK in colorectal cancer tissues by public database search as well as immunohistochemistry. Next, we analyzed HRK expression levels in CRC tissues,adjacent non-cancerous tissues, cell lines and normal intestinal epithelial cells by qPCR and Western blotting. CCK-8 proliferation assays, transwell assays, wound healing assays, colony assays and flow cytometry were performed to clarified the effect of HRK on CRC cells. Western blotting and rescue experiments were used to determine the role of HRK in regulating PI3K/AKT/mTOR signaling pathway. Results HRK expression was lower in CRC tissues and cell lines. Gain and loss of function experiments showed that HRK decreased proliferation, invasion and migration of CRC cells. Low expression of HRK inhibited CRC cell apoptosis as well as activated the PI3K/AKT/mTOR signaling pathway. In addition, rapamycin inhibits the activation of PI3K/AKT/mTOR signaling pathway and reverses HRK-induced alterations in cell biological functions. Conclusion Our study demonstrates that HRK is lowly expressed in colorectal cancer tissues. And for the first time, HRK was shown to promote apoptosis and inhibit proliferation of colorectal cancer cells by inhibiting PI3K/AKT/mTOR signaling pathway. HRK represents a potential target for the treatment of CRC.
Collapse
Affiliation(s)
- Haowei Wang
- Guangdong Provincial Key Laboratory of Molecular Tumor Pathology, Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China,Department of Pathology, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Yujia Chen
- Guangdong Provincial Key Laboratory of Molecular Tumor Pathology, Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Qinzi Yuan
- Guangdong Provincial Key Laboratory of Molecular Tumor Pathology, Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Lixia Chen
- Guangdong Provincial Key Laboratory of Molecular Tumor Pathology, Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Peiling Dai
- Guangdong Provincial Key Laboratory of Molecular Tumor Pathology, Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Xuenong Li
- Guangdong Provincial Key Laboratory of Molecular Tumor Pathology, Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China,Department of Pathology, Nanfang Hospital, Southern Medical University, Guangzhou, China,*Correspondence: Xuenong Li,
| |
Collapse
|
5
|
Azam S, Kim IS, Choi DK. α-Synuclein upregulates bim-mediated apoptosis by negatively regulating endogenous GCN5. Aging (Albany NY) 2022; 14:8292-8301. [DOI: 10.18632/aging.204353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 10/14/2022] [Indexed: 11/25/2022]
Affiliation(s)
- Shofiul Azam
- Department of Applied Life Science, Graduate School, BK21 Program, Konkuk University, Chungju 27478, Korea
| | - In-Su Kim
- Department of Biotechnology, College of Biomedical and Health Science, Research Institute of Inflammatory Disease (RID), Konkuk University, Chungju 27478, Korea
| | - Dong-Kug Choi
- Department of Applied Life Science, Graduate School, BK21 Program, Konkuk University, Chungju 27478, Korea
- Department of Biotechnology, College of Biomedical and Health Science, Research Institute of Inflammatory Disease (RID), Konkuk University, Chungju 27478, Korea
| |
Collapse
|
6
|
Kumar R, Chaudhary AK, Woytash J, Inigo JR, Gokhale AA, Bshara W, Attwood K, Wang J, Spernyak JA, Rath E, Yadav N, Haller D, Goodrich DW, Tang DG, Chandra D. A mitochondrial unfolded protein response inhibitor suppresses prostate cancer growth in mice via HSP60. J Clin Invest 2022; 132:e149906. [PMID: 35653190 PMCID: PMC9246382 DOI: 10.1172/jci149906] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 05/19/2022] [Indexed: 11/25/2022] Open
Abstract
Mitochondrial proteostasis, regulated by the mitochondrial unfolded protein response (UPRmt), is crucial for maintenance of cellular functions and survival. Elevated oxidative and proteotoxic stress in mitochondria must be attenuated by the activation of a ubiquitous UPRmt to promote prostate cancer (PCa) growth. Here we show that the 2 key components of the UPRmt, heat shock protein 60 (HSP60, a mitochondrial chaperonin) and caseinolytic protease P (ClpP, a mitochondrial protease), were required for the development of advanced PCa. HSP60 regulated ClpP expression via c-Myc and physically interacted with ClpP to restore mitochondrial functions that promote cancer cell survival. HSP60 maintained the ATP-producing functions of mitochondria, which activated the β-catenin pathway and led to the upregulation of c-Myc. We identified a UPRmt inhibitor that blocked HSP60's interaction with ClpP and abrogated survival signaling without altering HSP60's chaperonin function. Disruption of HSP60-ClpP interaction with the UPRmt inhibitor triggered metabolic stress and impeded PCa-promoting signaling. Treatment with the UPRmt inhibitor or genetic ablation of Hsp60 inhibited PCa growth and progression. Together, our findings demonstrate that the HSP60-ClpP-mediated UPRmt is essential for prostate tumorigenesis and the HSP60-ClpP interaction represents a therapeutic vulnerability in PCa.
Collapse
Affiliation(s)
| | | | | | | | | | - Wiam Bshara
- Department of Pathology and Laboratory Medicine
| | | | - Jianmin Wang
- Department of Biostatistics and Bioinformatics, and
| | - Joseph A. Spernyak
- Department of Cell Stress Biology, Roswell Park Comprehensive Cancer Center, Buffalo, New York, USA
| | - Eva Rath
- Chair of Nutrition and Immunology and
| | | | - Dirk Haller
- Chair of Nutrition and Immunology and
- ZIEL Institute for Food & Health, Technische Universität München, Freising-Weihenstephan, Germany
| | | | | | | |
Collapse
|
7
|
Lunavat SK, Singh SS, Mohammed AQ, Nakka VP, Phanithi PB, Medisetty R, Gogada R. The MreA Metal-Binding Sites C40, H65, and C69 Play a Critical Role in the Metal Tolerance of Pseudomonas putida KT2440. Curr Microbiol 2022; 79:142. [PMID: 35322302 DOI: 10.1007/s00284-022-02804-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Metal-binding proteins occur in the cytosol of most eubacteria. The hypothetical metal responsive protein MreA (PP-2969 gene; NreA) seems responsible for zinc, chromium, cadmium accumulation, and metal ion homeostasis. However, there is a lack of definitive evidence regarding the specific metal-binding sites of MreA protein. The present study aimed to identify putative metal-binding regions for MreA. In silico analysis revealed that amino acids C40, H65, and C69 (CHC region) seem critical for metal-protein interactions. We created site-directed mutants (SDM's) of MreA for interacted amino acids to validate in silico results. The differential scanning fluorimetry (DSF) and atomic absorption spectroscopy (AAS) showed that SDM strains of MreA protein curtailed metal accumulation compared to the wild types indicating C40, H65, and C69 amino acids are critical for metal binding. Thus, we report potential implications for MreA-bioengineered strains of Pseudomonas putida KT2440 for metal ion homeostasis by alleviating metal toxicity in the biological environment.
Collapse
Affiliation(s)
- Shanti Kumari Lunavat
- Department of Biochemistry, Osmania University, Hyderabad, Telangana, 500 007, India
| | | | - Abdul Qadeer Mohammed
- Department of Biochemistry, Osmania University, Hyderabad, Telangana, 500 007, India
| | - Venkata Prasuja Nakka
- Department of Biochemistry, Acharya Nagarjuna University, Guntur, Andhra Pradesh, 522510, India
| | - Prakash-Babu Phanithi
- Department of Biotechnology and Bioinformatics, University of Hyderabad, Hyderabad, Telangana, 500046, India
| | - Rajesh Medisetty
- Department of Biochemistry, Osmania University, Hyderabad, Telangana, 500 007, India
| | - Raghu Gogada
- Department of Biotechnology and Bioinformatics, University of Hyderabad, Hyderabad, Telangana, 500046, India.
- Department of Biochemistry, Osmania University, Hyderabad, Telangana, 500 007, India.
- Department of Biochemistry and Plant Physiology, MS Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakhemundi, Odisha, 761211, India.
| |
Collapse
|
8
|
Khandia R, Ali Khan A, Alexiou A, Povetkin SN, Nikolaevna VM. Codon Usage Analysis of Pro-Apoptotic Bim Gene Isoforms. J Alzheimers Dis 2022; 86:1711-1725. [DOI: 10.3233/jad-215691] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Background: Bim is a Bcl-2 homology 3 (BH3)-only proteins, a group of pro-apoptotic proteins involved in physiological and pathological conditions. Both the overexpression and under-expression of Bim protein are associated with the diseased condition, and various isoforms of Bim protein are present with differential apoptotic potential. Objective: The present study attempted to envisage the association of various molecular signatures with the codon choices of Bim isoforms. Methods: Molecular signatures like composition, codon usage, nucleotide skews, the free energy of mRNA transcript, physical properties of proteins, codon adaptation index, relative synonymous codon usage, and dinucleotide odds ratio were determined and analyzed for their associations with codon choices of Bim gene. Results: Skew analysis of the Bim gene indicated the preference of C nucleotide over G, A, and T and preference of G over T and A nucleotides was observed. An increase in C content at the first and third codon position increased gene expression while it decreased at the second codon position. Compositional constraints on nucleotide C at all three codon positions affected gene expression. The analysis revealed an exceptionally high usage of CpC dinucleotide in all the envisaged 31 isoforms of Bim. We correlated it with the requirement of rapid demethylation machinery to fine-tune the Bimgene expression. Also, mutational pressure played a dominant role in shaping codon usage bias in Bim isoforms. Conclusion: An exceptionally high usage of CpC dinucleotide in all the envisaged 31 isoforms of Bim indicates a high order selectional force to fine tune Bim gene expression.
Collapse
Affiliation(s)
- Rekha Khandia
- Department of Biochemistry and Genetics, Barkatullah University, Bhopal, India
| | - Azmat Ali Khan
- Pharmaceutical Biotechnology Laboratory, Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Athanasios Alexiou
- Novel Global Community Educational Foundation, Australia & AFNP Med, Austria
| | | | | |
Collapse
|
9
|
Wenzel D, Haddadi N, Afshari K, Richmond JM, Rashighi M. Upcoming treatments for morphea. Immun Inflamm Dis 2021; 9:1101-1145. [PMID: 34272836 PMCID: PMC8589364 DOI: 10.1002/iid3.475] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 05/29/2021] [Indexed: 11/25/2022] Open
Abstract
Morphea (localized scleroderma) is a rare autoimmune connective tissue disease with variable clinical presentations, with an annual incidence of 0.4-2.7 cases per 100,000. Morphea occurs most frequently in children aged 2-14 years, and the disease exhibits a female predominance. Insights into morphea pathogenesis are often extrapolated from studies of systemic sclerosis due to their similar skin histopathologic features; however, clinically they are two distinct diseases as evidenced by different demographics, clinical features, disease course and prognosis. An interplay between genetic factors, epigenetic modifications, immune and vascular dysfunction, along with environmental hits are considered as the main contributors to morphea pathogenesis. In this review, we describe potential new therapies for morphea based on both preclinical evidence and ongoing clinical trials. We focus on different classes of therapeutics, including antifibrotic, anti-inflammatory, cellular and gene therapy, and antisenolytic approaches, and how these target different aspects of disease pathogenesis.
Collapse
Affiliation(s)
- Dan Wenzel
- Department of DermatologyUniversity of Massachusetts Medical SchoolWorcesterMassachusettsUSA
| | - Nazgol‐Sadat Haddadi
- Department of DermatologyUniversity of Massachusetts Medical SchoolWorcesterMassachusettsUSA
| | - Khashayar Afshari
- Department of DermatologyUniversity of Massachusetts Medical SchoolWorcesterMassachusettsUSA
| | - Jillian M. Richmond
- Department of DermatologyUniversity of Massachusetts Medical SchoolWorcesterMassachusettsUSA
| | - Mehdi Rashighi
- Department of DermatologyUniversity of Massachusetts Medical SchoolWorcesterMassachusettsUSA
| |
Collapse
|
10
|
Keerthiga R, Pei DS, Fu A. Mitochondrial dysfunction, UPR mt signaling, and targeted therapy in metastasis tumor. Cell Biosci 2021; 11:186. [PMID: 34717757 PMCID: PMC8556915 DOI: 10.1186/s13578-021-00696-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 10/02/2021] [Indexed: 12/13/2022] Open
Abstract
In modern research, mitochondria are considered a more crucial energy plant in cells. Mitochondrial dysfunction, including mitochondrial DNA (mtDNA) mutation and denatured protein accumulation, is a common feature of tumors. The dysfunctional mitochondria reprogram molecular metabolism and allow tumor cells to proliferate in the hostile microenvironment. One of the crucial signaling pathways of the mitochondrial dysfunction activation in the tumor cells is the retrograde signaling of mitochondria-nucleus interaction, mitochondrial unfolded protein response (UPRmt), which is initiated by accumulation of denatured protein and excess ROS production. In the process of UPRmt, various components are activitated to enhance the mitochondria-nucleus retrograde signaling to promote carcinoma progression, including hypoxia-inducible factor (HIF), activating transcription factor ATF-4, ATF-5, CHOP, AKT, AMPK. The retrograde signaling molecules of overexpression ATF-5, SIRT3, CREB, SOD1, SOD2, early growth response protein 1 (EGR1), ATF2, CCAAT/enhancer-binding protein-d, and CHOP also involved in the process. Targeted blockage of the UPRmt pathway could obviously inhibit tumor proliferation and metastasis. This review indicates the UPRmt pathways and its crucial role in targeted therapy of metastasis tumors.
Collapse
Affiliation(s)
| | - De-Sheng Pei
- School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, China.
| | - Ailing Fu
- College of Pharmaceutical Sciences, Southwest University, Chongqing, China.
| |
Collapse
|
11
|
Signaling Pathways That Control Apoptosis in Prostate Cancer. Cancers (Basel) 2021; 13:cancers13050937. [PMID: 33668112 PMCID: PMC7956765 DOI: 10.3390/cancers13050937] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 02/18/2021] [Indexed: 12/11/2022] Open
Abstract
Prostate cancer is the second most common malignancy and the fifth leading cancer-caused death in men worldwide. Therapies that target the androgen receptor axis induce apoptosis in normal prostates and provide temporary relief for advanced disease, yet prostate cancer that acquired androgen independence (so called castration-resistant prostate cancer, CRPC) invariably progresses to lethal disease. There is accumulating evidence that androgen receptor signaling do not regulate apoptosis and proliferation in prostate epithelial cells in a cell-autonomous fashion. Instead, androgen receptor activation in stroma compartments induces expression of unknown paracrine factors that maintain homeostasis of the prostate epithelium. This paradigm calls for new studies to identify paracrine factors and signaling pathways that control the survival of normal epithelial cells and to determine which apoptosis regulatory molecules are targeted by these pathways. This review summarizes the recent progress in understanding the mechanism of apoptosis induced by androgen ablation in prostate epithelial cells with emphasis on the roles of BCL-2 family proteins and "druggable" signaling pathways that control these proteins. A summary of the clinical trials of inhibitors of anti-apoptotic signaling pathways is also provided. Evidently, better knowledge of the apoptosis regulation in prostate epithelial cells is needed to understand mechanisms of androgen-independence and implement life-extending therapies for CRPC.
Collapse
|
12
|
Fan L, Tian Y, Sun Y, Hu Z. [Expression and Clinical Significance of Lipocalin-2 in the Serum of Lung Cancer Patients]. ZHONGGUO FEI AI ZA ZHI = CHINESE JOURNAL OF LUNG CANCER 2021; 24:108-111. [PMID: 33626852 PMCID: PMC7936081 DOI: 10.3779/j.issn.1009-3419.2021.102.08] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
背景与目的 肺癌是全球发病率最高的癌症类型,严重威胁着人类健康。肺癌的早期诊断、早期治疗对于肺癌患者的生存尤为重要。血清中的肿瘤标志物作为肿瘤早期诊断的一种重要方法已被广泛应用。然而,肺癌的早期诊断标志物还很少。本研究旨在探讨Lipocalin-2在肺癌患者血清中的表达水平及其临床意义。 方法 采用酶联免疫吸附法(enzyme linked immunosorbent assay, ELISA)检测Lipocalin-2在60例肺癌患者与63例健康人群外周血血清中的浓度,并分析Lipocalin-2表达水平与肺癌临床特征之间的关系。 结果 Lipocalin-2在肺癌患者外周血血清中的表达水平明显高于健康人群,差异具有明显统计学意义(P < 0.001)。Lipocalin-2在肺癌患者中的表达与病理组织的分化、分期及淋巴结转移相关,差异具有明显统计学意义(P < 0.05)。Lipocalin-2在病理分化差的肺癌患者血清中的表达高于分化良好患者;在发生淋巴结转移的肺癌患者血清中的表达高于没有发生淋巴结转移患者;在临床Ⅲ期+Ⅳ期肺癌患者中的表达水平显著高于临床Ⅰ期Ⅱ期患者;差异均具有统计学意义(P < 0.05)。 结论 Lipocalin-2在肺癌患者血清水平中高表达,与病理组织的分化、分期及淋巴结转移相关,有望成为一种潜在的用于临床诊断的新型肺癌肿瘤标志物。
Collapse
Affiliation(s)
- Liming Fan
- Department of Clinical Laboratory, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Yuan Tian
- Department of Clinical Laboratory, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Ying Sun
- Department of Clinical Laboratory, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Zhidong Hu
- Department of Clinical Laboratory, Tianjin Medical University General Hospital, Tianjin 300052, China
| |
Collapse
|
13
|
Nakhla S, Rahawy A, Salam MAE, Shalaby T, Zaghloul M, El-Abd E. Radiosensitizing and Phototherapeutic Effects of AuNPs are Mediated by Differential Noxa and Bim Gene Expression in MCF-7 Breast Cancer Cell Line. IEEE Trans Nanobioscience 2020; 20:20-27. [PMID: 33017288 DOI: 10.1109/tnb.2020.3028562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
To compare the apoptotic efficiency of AuNPs, ionizing and non-ionizing radiotherapy, phototherapy, and AuNPs-ionizing-radiotherapy), MCF-7 cells were used as a model for luminal B subtypes of breast carcinoma. A mixture of AuNPs [66% of Au-nanospheres (AuNSs) and 34% of Au-nanorods (AuNRs)] was synthesized and characterized by optical spectroscopy, zeta potential, and transmission electron microscopy (TEM). MCF-7 were divided into six groups (triplicates); after each treatment, cell viability was tested by MTT assay and relative gene expression levels of Bim and Noxa proapoptotic markers were assayed by qRT-PCR. A dose-dependent significant reduction in cell viability of MCF-7 was detected by all examined treatment protocols. Lower viability detected at extended exposure (48 hours) to AuNPs ( [Formula: see text]/ml) was mediated by the upregulation of Noxa gene expression. AuNS and AuNR in vitro PTTs were mediated by differential expression of Bim and Noxa while AuNPs mixture had a combined effect on both Bim and Noxa. Cellular recovery was observed two days-post x-rays irradiation at does < 3 Gy. AuNPs showed dose enhancement factor (DEF) > 12 indicating a high radiosensitizing effect that was partially mediated by Noxa. In conclusion, AuNPs combined therapies exert better anti-proliferative effects via differential regulation of Noxa and Bim gene expressions.
Collapse
|
14
|
Khan M, Harms JS, Liu Y, Eickhoff J, Tan JW, Hu T, Cai F, Guimaraes E, Oliveira SC, Dahl R, Cheng Y, Gutman D, Barber GN, Splitter GA, Smith JA. Brucella suppress STING expression via miR-24 to enhance infection. PLoS Pathog 2020; 16:e1009020. [PMID: 33108406 PMCID: PMC7647118 DOI: 10.1371/journal.ppat.1009020] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 11/06/2020] [Accepted: 10/01/2020] [Indexed: 12/12/2022] Open
Abstract
Brucellosis, caused by a number of Brucella species, remains the most prevalent zoonotic disease worldwide. Brucella establish chronic infections within host macrophages despite triggering cytosolic innate immune sensors, including Stimulator of Interferon Genes (STING), which potentially limit infection. In this study, STING was required for control of chronic Brucella infection in vivo. However, early during infection, Brucella down-regulated STING mRNA and protein. Down-regulation occurred post-transcriptionally, required live bacteria, the Brucella type IV secretion system, and was independent of host IRE1-RNase activity. STING suppression occurred in MyD88-/- macrophages and was not induced by Toll-like receptor agonists or purified Brucella lipopolysaccharide (LPS). Rather, Brucella induced a STING-targeting microRNA, miR-24-2, in a type IV secretion system-dependent manner. Furthermore, STING downregulation was inhibited by miR-24 anti-miRs and in Mirn23a locus-deficient macrophages. Failure to suppress STING expression in Mirn23a-/- macrophages correlated with diminished Brucella replication, and was rescued by exogenous miR-24. Mirn23a-/- mice were also more resistant to splenic colonization one week post infection. Anti-miR-24 potently suppressed replication in wild type, but much less in STING-/- macrophages, suggesting most of the impact of miR-24 induction on replication occurred via STING suppression. In summary, Brucella sabotages cytosolic surveillance by miR-24-dependent suppression of STING expression; post-STING activation “damage control” via targeted STING destruction may enable establishment of chronic infection. Cytosolic pattern recognition receptors, such as the nucleotide-activated STING molecule, play a critical role in the innate immune system by detecting the presence of intracellular invaders. Brucella bacterial species establish chronic infections in macrophages despite initially activating STING. STING participates in the control of Brucella infection, as mice or cells lacking STING show a higher burden of Brucella infection. However, we have found that early following infection, Brucella upregulates a microRNA, miR-24, that targets the STING messenger RNA, resulting in lower STING levels. Dead bacteria or bacteria lacking a functional type IV secretion system were defective at upregulating miR-24 and STING suppression, suggesting an active bacteria-driven process. Failure to upregulate miR-24 and suppress STING greatly compromised the capacity of Brucella to replicate inside macrophages and in mice. Thus, although Brucella initially activate STING during infection, the ensuing STING downregulation serves as a “damage control” mechanism, enabling intracellular infection. Viruses have long been known to target immune sensors such as STING. Our results indicate that intracellular bacterial pathogens also directly target innate immune receptors to enhance their infectious success.
Collapse
Affiliation(s)
- Mike Khan
- Cellular and Molecular Pathology Training Program, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Jerome S. Harms
- Department of Pediatrics, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Yiping Liu
- Department of Pediatrics, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Jens Eickhoff
- Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Jin Wen Tan
- Department of Pediatrics, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Tony Hu
- Department of Pediatrics, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Fengwei Cai
- Department of Pediatrics, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Erika Guimaraes
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte-Minas Gerais, Brazil
- Programa de Pós-Graduação em Genética, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Sergio Costa Oliveira
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte-Minas Gerais, Brazil
| | - Richard Dahl
- Department of Microbiology and Immunology, Indiana University School of Medicine, South Bend, Indiana, United States of America
- Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana, United States of America
| | - Yong Cheng
- Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana, United States of America
| | - Delia Gutman
- Department of Cell Biology, University of Miami, Miami, Florida, United States of America
| | - Glen N. Barber
- Department of Cell Biology, University of Miami, Miami, Florida, United States of America
| | - Gary A. Splitter
- Department of Pathobiological Sciences, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Judith A. Smith
- Department of Pediatrics, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- * E-mail:
| |
Collapse
|
15
|
Astragaloside IV alleviates the brain damage induced by subarachnoid hemorrhage via PI3K/Akt signaling pathway. Neurosci Lett 2020; 735:135227. [PMID: 32619654 DOI: 10.1016/j.neulet.2020.135227] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 06/12/2020] [Accepted: 06/29/2020] [Indexed: 01/03/2023]
Abstract
Subarachnoid hemorrhage (SAH) caused brain damage accounts for more than 20 % death of patients with cerebrovascular diseases. We aimed to investigate the effects of Astragaloside IV (AS-IV) on SAH-induced brain damage and its underlying mechanism. SAH rat model was established and treated with or without AS-IV. Brain injury and function were evaluated by neurological score, brain water content, Nissl staining, and behavioral experiments using Morris water maze. The protein expression related to SAH caused inflammation and neuron apoptosis were assessed. As expected, after 24 h of SAH, Garcia score, beam balance score and the number of intact neurons were significantly reduced in SAH rats compared to sham rats, but AS-IV treatment dramatically elevated the two scores and the number of intact neuron number. Brain water content that increased after SAH was also declined in AS-IV treated rats compared to untreated rats. In addition, SAH rats treated with AS-IV also showed better neurological outcomes than untreated SAH rats including shorter escape time and swimming distance, longer quadrant stay in the Morris water maze and increased fall latency from the rod rotating. In addition, in the SAH rats, the anti-apoptosis pathway phosphoinositide 3-kinase (PI3K)/ protein kinase B (Akt) was activated while nuclear factor-κB (NF-κB) signaling was markedly repressed by AS-IV. Several apoptosis associated genes including FoxO1, Bim, Bax and a typical apoptosis marker cleaved-caspase-3 were all downregulated by AS-IV. In conclusion, this study found a protective role of AS-IV in SAH-induced brain injury through regulating PI3K and NF-κB signaling pathways.
Collapse
|
16
|
Guo Z, Song T, Wang Z, Lin D, Cao K, Liu P, Feng Y, Zhang X, Wang P, Yin F, Dai J, Zhou S, Zhang Z. The chaperone Hsp70 is a BH3 receptor activated by the pro-apoptotic Bim to stabilize anti-apoptotic clients. J Biol Chem 2020; 295:12900-12909. [PMID: 32651234 DOI: 10.1074/jbc.ra120.013364] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Revised: 07/07/2020] [Indexed: 12/20/2022] Open
Abstract
The chaperone heat shock protein 70 (Hsp70) is crucial for avoiding protein misfolding under stress, but is also up-regulated in many kinds of cancers, where its ability to buffer cellular stress prevents apoptosis. Previous research has suggested Hsp70 interacts with pro-apoptotic Bcl-2 family proteins, including Bim and Bax. However, a definitive demonstration of this interaction awaits, and insights into the structural basis and molecular mechanism remain unclear. Earlier studies have identified a Bcl-2 homology 3 (BH3) domain present in Bcl-2 family members that engages receptors to stimulate apoptosis. We now show that Hsp70 physically interacts with pro-apoptotic multidomain and BH3-only proteins via a BH3 domain, thereby serving as a novel BH3 receptor, using in vitro fluorescent polarization (FP), isothermal titration calorimetry (ITC), and cell-based co-immunoprecipitation (co-IP) experiments, 1H-15N-transverse relaxation optimized spectroscopy (TROSY-HSQC), trypsin proteolysis, ATPase activity, and denatured rhodanese aggregation measurements further demonstrated that BimBH3 binds to a novel allosteric site in the nucleotide-binding domain (NBD) of Hsp70, by which Bim acts as a positive co-chaperone to promote the ATPase activity and chaperone functions. A dual role of Hsp70's anti-apoptotic function was revealed that when it keeps Bim in check to inhibit apoptosis, it simultaneously stabilizes oncogenic clients including AKT and Raf-1 with the aid of Bim. Two faces of Bim in cell fate regulation were revealed that in opposite to its well-established pro-apoptotic activator role, Bim could help the folding of oncogenic proteins.
Collapse
Affiliation(s)
- Zongwei Guo
- School of Bioengineering, Dalian University of Technology, Dalian, Liaoning, China
| | - Ting Song
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning, China.
| | - Ziqian Wang
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning, China
| | - Donghai Lin
- The Key Laboratory for Chemical Biology of Fujian ProvinceMOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, The Key Laboratory for Chemical Biology of Fujian ProvinceMOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Xiamen, Fujian, China
| | - Keke Cao
- School of Bioengineering, Dalian University of Technology, Dalian, Liaoning, China
| | - Peng Liu
- School of Bioengineering, Dalian University of Technology, Dalian, Liaoning, China
| | - Yingang Feng
- Shandong Key Laboratory of Synthetic Biology, CAS Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong, China
| | - Xiaodong Zhang
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning, China
| | - Peiran Wang
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning, China
| | - Fangkui Yin
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning, China
| | - Jian Dai
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning, China
| | - Sheng Zhou
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning, China
| | - Zhichao Zhang
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning, China.
| |
Collapse
|
17
|
Biological Functions and Therapeutic Potential of Lipocalin 2 in Cancer. Int J Mol Sci 2020; 21:ijms21124365. [PMID: 32575507 PMCID: PMC7352275 DOI: 10.3390/ijms21124365] [Citation(s) in RCA: 77] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 06/05/2020] [Accepted: 06/15/2020] [Indexed: 12/22/2022] Open
Abstract
Lipocalin-2 (LCN2) is a secreted glycoprotein linked to several physiological roles, including transporting hydrophobic ligands across cell membranes, modulating immune responses, maintaining iron homeostasis, and promoting epithelial cell differentiation. Although LNC2 is expressed at low levels in most human tissues, it is abundant in aggressive subtypes of cancer, including breast, pancreas, thyroid, ovarian, colon, and bile duct cancers. High levels of LCN2 have been associated with increased cell proliferation, angiogenesis, cell invasion, and metastasis. Moreover, LCN2 modulates the degradation, allosteric events, and enzymatic activity of matrix metalloprotease-9, a metalloprotease that promotes tumor cell invasion and metastasis. Hence, LCN2 has emerged as a potential therapeutic target against many cancer types. This review summarizes the most relevant findings regarding the expression, biological roles, and regulation of LCN2, as well as the proteins LCN2 interacts with in cancer. We also discuss the approaches to targeting LCN2 for cancer treatment that are currently under investigation, including the use of interference RNAs, antibodies, and gene editing.
Collapse
|
18
|
O'Malley J, Kumar R, Inigo J, Yadava N, Chandra D. Mitochondrial Stress Response and Cancer. Trends Cancer 2020; 6:688-701. [PMID: 32451306 DOI: 10.1016/j.trecan.2020.04.009] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 04/16/2020] [Accepted: 04/22/2020] [Indexed: 12/20/2022]
Abstract
Cancer cells survive and adapt to many types of stress including hypoxia, nutrient deprivation, metabolic, and oxidative stress. These stresses are sensed by diverse cellular signaling processes, leading to either degradation of mitochondria or alleviation of mitochondrial stress. This review discusses signaling during sensing and mitigation of stress involving mitochondrial communication with the endoplasmic reticulum, and how retrograde signaling upregulates the mitochondrial stress response to maintain mitochondrial integrity. The importance of the mitochondrial unfolded protein response, an emerging pathway that alleviates cellular stress, will be elaborated with respect to cancer. Detailed understanding of cellular pathways will establish mitochondrial stress response as a key mechanism for cancer cell survival leading to cancer progression and resistance, and provide a potential therapeutic target in cancer.
Collapse
Affiliation(s)
- Jordan O'Malley
- Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Rahul Kumar
- Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Joseph Inigo
- Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Nagendra Yadava
- Department of Anesthesiology and Center for Shock, Trauma, and Anesthesiology Research, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Dhyan Chandra
- Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA.
| |
Collapse
|
19
|
Yadav N, Gogada R, O'Malley J, Gundampati RK, Jayanthi S, Hashmi S, Lella R, Zhang D, Wang J, Kumar R, Suresh Kumar TK, Chandra D. Molecular insights on cytochrome c and nucleotide regulation of apoptosome function and its implication in cancer. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2020; 1867:118573. [PMID: 31678591 PMCID: PMC7733678 DOI: 10.1016/j.bbamcr.2019.118573] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 10/14/2019] [Accepted: 10/22/2019] [Indexed: 12/20/2022]
Abstract
Cytochrome c (Cyt c) released from mitochondria interacts with Apaf-1 to form the heptameric apoptosome, which initiates the caspase cascade to execute apoptosis. Although lysine residue at 72 (K72) of Cyt c plays an important role in the Cyt c-Apaf-1 interaction, the underlying mechanism of interaction between Cyt c and Apaf-1 is still not clearly defined. Here we identified multiple lysine residues including K72, which are also known to interact with ATP, to play a key role in Cyt c-Apaf-1 interaction. Mutation of these lysine residues abrogates the apoptosome formation causing inhibition of caspase activation. Using in-silico molecular docking, we have identified Cyt c-binding interface on Apaf-1. Although mutant Cyt c shows higher affinity for Apaf-1, the presence of Cyt c-WT restores the apoptosome activity. ATP addition modulates only mutant Cyt c binding to Apaf-1 but not WT Cyt c binding to Apaf-1. Using TCGA and cBioPortal, we identified multiple mutations in both Apaf-1 and Cyt c that are predicted to interfere with apoptosome assembly. We also demonstrate that transcript levels of various enzymes involved with dATP or ATP synthesis are increased in various cancers. Silencing of nucleotide metabolizing enzymes such as ribonucleotide reductase subunit M1 (RRM1) and ATP-producing glycolytic enzymes PKM2 attenuated ATP production and enhanced caspase activation. These findings suggest important role for lysine residues of Cyt c and nucleotides in the regulation of apoptosome-dependent apoptotic cell death as well as demonstrate how these mutations and nucleotides may have a pivotal role in human diseases such as cancer.
Collapse
Affiliation(s)
- Neelu Yadav
- The Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, United States of America
| | - Raghu Gogada
- The Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, United States of America
| | - Jordan O'Malley
- The Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, United States of America
| | - Ravi Kumar Gundampati
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR 72701, United States of America
| | - Srinivas Jayanthi
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR 72701, United States of America
| | - Sana Hashmi
- The Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, United States of America
| | - Ravi Lella
- The Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, United States of America
| | - Dianmu Zhang
- The Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, United States of America
| | - Jianmin Wang
- The Department of Biostatistics and Bioinformatics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, United States of America
| | - Rahul Kumar
- The Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, United States of America
| | | | - Dhyan Chandra
- The Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, United States of America.
| |
Collapse
|
20
|
Li J, Abe K, Milanesi A, Liu YY, Brent GA. Thyroid Hormone Protects Primary Cortical Neurons Exposed to Hypoxia by Reducing DNA Methylation and Apoptosis. Endocrinology 2019; 160:2243-2256. [PMID: 31095291 DOI: 10.1210/en.2019-00125] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 05/10/2019] [Indexed: 02/03/2023]
Abstract
Traumatic brain injury (TBI) is associated with disruption of cerebral blood flow leading to localized brain hypoxia. Thyroid hormone (TH) treatment, administered shortly after injury, has been shown to promote neural protection in rodent TBI models. The mechanism of TH protection, however, is not established. We used mouse primary cortical neurons to investigate the effectiveness and possible pathways of T3-promoted cell survival after exposure to hypoxic injury. Cultured primary cortical neurons were exposed to hypoxia (0.2% oxygen) for 7 hours with or without T3 (5 nM). T3 treatment enhanced DNA 5-hydroxymethylcytosine levels and attenuated the hypoxia-induced increase in DNA 5-methylcytosine (5-mc). In the presence of T3, mRNA expression of Tet family genes was increased and DNA methyltransferase (Dnmt) 3a and Dnmt3b were downregulated, compared with conditions in the absence of T3. These T3-induced changes decreased hypoxia-induced DNA de novo methylation, which reduced hypoxia-induced neuronal damage and apoptosis. We used RNA sequencing to characterize T3-regulated genes in cortical neurons under hypoxic conditions and identified 22 genes that were upregulated and 15 genes that were downregulated. Krüppel-like factor 9 (KLF9), a multifunctional transcription factor that plays a key role in central nervous system development, was highly upregulated by T3 treatment in hypoxic conditions. Knockdown of the KLF9 gene resulted in early apoptosis and abolished the beneficial role of T3 in neuronal survival. KLF9 mediates, in part, the neuronal protective role of T3. T3 treatment reduces hypoxic damage, although pathways that reduce DNA methylation and apoptosis remain to be elucidated.
Collapse
Affiliation(s)
- Jianrong Li
- Molecular Endocrinology Laboratory, VA Greater Los Angeles Healthcare System, Endocrinology Division, Departments of Medicine and Physiology, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, California
| | - Kiyomi Abe
- Molecular Endocrinology Laboratory, VA Greater Los Angeles Healthcare System, Endocrinology Division, Departments of Medicine and Physiology, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, California
| | - Anna Milanesi
- Molecular Endocrinology Laboratory, VA Greater Los Angeles Healthcare System, Endocrinology Division, Departments of Medicine and Physiology, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, California
| | - Yan-Yun Liu
- Molecular Endocrinology Laboratory, VA Greater Los Angeles Healthcare System, Endocrinology Division, Departments of Medicine and Physiology, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, California
| | - Gregory A Brent
- Molecular Endocrinology Laboratory, VA Greater Los Angeles Healthcare System, Endocrinology Division, Departments of Medicine and Physiology, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, California
| |
Collapse
|
21
|
Patankar M, Eskelinen S, Tuomisto A, Mäkinen MJ, Karttunen TJ. KRAS and BRAF mutations induce anoikis resistance and characteristic 3D phenotypes in Caco‑2 cells. Mol Med Rep 2019; 20:4634-4644. [PMID: 31545494 PMCID: PMC6797985 DOI: 10.3892/mmr.2019.10693] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 08/05/2019] [Indexed: 12/13/2022] Open
Abstract
In a number of types of cancer, anoikis, a form of apoptosis induced by loss of extracellular matrix (ECM) attachment, is disturbed. Anoikis resistance is essential in the formation of metastases. A recent study identified carcinoma cell subpopulations surviving without ECM contact in pathological specimens of colorectal cancer. The occurrence of these subpopulations indicated anoikis resistance. In the present study, it is demonstrated that KRAS and BRAF mutations induce anoikis resistance in colon cancer (Caco-2) cells. In 3D cultures, Caco-2 cells transfected with mutated KRAS or BRAF formed multicellular structures analogous to anoikis-resistant subpopulations in actual carcinomas, and serve as an in vitro model for anoikis resistance. Caco-2 cell lines were constructed, with KRAS or BRAF mutations, using retroviral delivery. The current study investigated anoikis resistance using an Annexin V apoptosis test from suspension cultures. 3D in vitro cultures, which were generated in collagen-matrigel mixtures, were assessed using confocal microscopy. 3D cultures embedded in paraffin were analyzed using conventional histopathology. In suspension cultures, Caco-2 cells with KRAS or BRAF mutations indicated a significantly lower proportion of Annexin positivity than the native Caco-2 cells, indicating that these mutations induce anoikis resistance in Caco-2 cells. 3D cultures displayed native Caco-2 cells forming polarized cysts with a single layer thick epithelium, whereas Caco-2 cells with KRAS or BRAF mutations formed partially filled cystic structures or solid round structures where only the outermost layer was in contact with the ECM. Additionally, KRAS mutations induced reversed polarity to Caco-2 cells along with the emergence of solid growth. The present study demonstrated that KRAS and BRAF mutations induce anoikis resistance in Caco-2 colorectal cancer cells. The growth patterns generated from the KRAS and BRAF mutated cells in 3D cultures revealed a resemblance to the putative anoikis-resistant subpopulations in actual carcinomas, including micropapillary structures and solid tumor cell islands. Additionally, KRAS mutation induced the emergence of inverted polarity. In conclusion, 3D cultures with modified Caco-2 cells serve as a valid in vitro model for anoikis resistance and inverted polarity.
Collapse
Affiliation(s)
- Madhura Patankar
- Department of Pathology, Cancer and Translational Medicine Research Unit, University of Oulu, 90014 Oulu, Finland
| | - Sinikka Eskelinen
- Department of Pathology, Cancer and Translational Medicine Research Unit, University of Oulu, 90014 Oulu, Finland
| | - Anne Tuomisto
- Department of Pathology, Cancer and Translational Medicine Research Unit, University of Oulu, 90014 Oulu, Finland
| | - Markus J Mäkinen
- Department of Pathology, Cancer and Translational Medicine Research Unit, University of Oulu, 90014 Oulu, Finland
| | - Tuomo J Karttunen
- Department of Pathology, Cancer and Translational Medicine Research Unit, University of Oulu, 90014 Oulu, Finland
| |
Collapse
|
22
|
Ghia EM, Rassenti LZ, Neuberg DS, Blanco A, Yousif F, Smith EN, McPherson JD, Hudson TJ, Harismendy O, Frazer KA, Kipps TJ. Activation of hedgehog signaling associates with early disease progression in chronic lymphocytic leukemia. Blood 2019; 133:2651-2663. [PMID: 30923040 PMCID: PMC6587306 DOI: 10.1182/blood-2018-09-873695] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 03/11/2019] [Indexed: 12/14/2022] Open
Abstract
Targeted sequencing of 103 leukemia-associated genes in leukemia cells from 841 treatment-naive patients with chronic lymphocytic leukemia (CLL) identified 89 (11%) patients as having CLL cells with mutations in genes encoding proteins that putatively are involved in hedgehog (Hh) signaling. Consistent with this finding, there was a significant association between the presence of these mutations and the expression of GLI1 (χ2 test, P < .0001), reflecting activation of the Hh pathway. However, we discovered that 38% of cases without identified mutations also were GLI1+ Patients with GLI1+ CLL cells had a shorter median treatment-free survival than patients with CLL cells lacking expression of GLI1 independent of IGHV mutation status. We found that GANT61, a small molecule that can inhibit GLI1, was highly cytotoxic for GLI1+ CLL cells relative to that of CLL cells without GLI1. Collectively, this study shows that a large proportion of patients have CLL cells with activated Hh signaling, which is associated with early disease progression and enhanced sensitivity to inhibition of GLI1.
Collapse
MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Disease Progression
- Female
- Gene Expression Regulation, Leukemic/genetics
- Hedgehog Proteins/metabolism
- Humans
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/metabolism
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Male
- Middle Aged
- Pyridines/pharmacology
- Pyrimidines/pharmacology
- Signal Transduction/drug effects
- Signal Transduction/physiology
- Zinc Finger Protein GLI1/metabolism
Collapse
Affiliation(s)
- Emanuela M Ghia
- Moores Cancer Center, University of California San Diego, La Jolla, CA
| | - Laura Z Rassenti
- Moores Cancer Center, University of California San Diego, La Jolla, CA
| | - Donna S Neuberg
- Biostatistics and Computational Biology, Dana-Farber Cancer Institute, Boston, MA
| | - Alejandro Blanco
- Programa de Genetica Humana, Universidad de Chile, Santiago, Chile
| | - Fouad Yousif
- Ontario Institute for Cancer Research, Toronto, ON, Canada
| | - Erin N Smith
- Department of Pediatrics and Rady Children's Hospital, University of California San Diego, La Jolla, CA
| | - John D McPherson
- Department of Biochemistry and Molecular Medicine, UC Davis School of Medicine, Sacramento, CA; and
| | | | - Olivier Harismendy
- Moores Cancer Center, University of California San Diego, La Jolla, CA
- Bioinformatics and Systems Biology, University of California San Diego, La Jolla, CA
| | - Kelly A Frazer
- Moores Cancer Center, University of California San Diego, La Jolla, CA
- Department of Pediatrics and Rady Children's Hospital, University of California San Diego, La Jolla, CA
| | - Thomas J Kipps
- Moores Cancer Center, University of California San Diego, La Jolla, CA
| |
Collapse
|
23
|
Jiang D, Song Y, Cao W, Wang X, Jiang D, Lv Z, Yang Z, Li F. p53-independent role of MYC mutant T58A in the proliferation and apoptosis of breast cancer cells. Oncol Lett 2019; 17:1071-1079. [PMID: 30655867 PMCID: PMC6312996 DOI: 10.3892/ol.2018.9688] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 09/24/2018] [Indexed: 12/31/2022] Open
Abstract
Myc proto-oncogene (MYC) is an oncoprotein that promotes proliferation and apoptosis. MYC mutations frequently disrupt the apoptotic processes during tumorigenesis. In the present study, the effects of the MYC point mutation T58A on the progression of a cellular tumor antigen p53 (p53)-/- human breast cancer cell line was analyzed, and the mechanism of p53-independent MYC-induced apoptosis was investigated. HCC1937 cells were transfected with mutant (T58A) or wild-type (WT) MYC using lentiviral vectors. The proliferation of transfected cells was evaluated by colony formation and MTT assays, and apoptosis was analyzed by flow cytometry and terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling assays. WT MYC was transfected into HCC1937 cells exhibiting p14/p21 silencing through lentivirus-mediated RNA interference. The expression levels of Bim were detected by reverse transcription-quantitative polymerase chain reaction and western blot analyses. Mutant MYC proteins retained the ability to stimulate the proliferation of HCC1937 cells, although they were defective at promoting apoptosis due to a failure to induce the Bcl-2 homology 3 domain-only protein Bim. When p14 was silenced, the effects of mutant MYC on proliferation and apoptosis were weakened. When p21 was silenced, the effects of mutant MYC were strengthened. Breast cancer-derived T58A MYC mutations are unable to activate Bim due to their failure to regulate p14/p21. It was concluded that mutant MYC was more effective compared with WT MYC at promoting the progression of breast cancer.
Collapse
Affiliation(s)
- Dandan Jiang
- Breast Center, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Yuhua Song
- Breast Center, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Weihong Cao
- Breast Center, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Xingang Wang
- Breast Center, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Danni Jiang
- Imaging Department, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Zhidong Lv
- Breast Center, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Zhaochuan Yang
- Breast Center, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Funian Li
- Breast Center, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| |
Collapse
|
24
|
Molavi G, Samadi N, Hosseingholi EZ. The roles of moonlight ribosomal proteins in the development of human cancers. J Cell Physiol 2018; 234:8327-8341. [PMID: 30417503 DOI: 10.1002/jcp.27722] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 09/23/2018] [Indexed: 12/13/2022]
Abstract
"Moonlighting protein" is a term used to define a single protein with multiple functions and different activities that are not derived from gene fusions, multiple RNA splicing, or the proteolytic activity of promiscuous enzymes. Different proteinous constituents of ribosomes have been shown to have important moonlighting extra-ribosomal functions. In this review, we introduce the impact of key moonlight ribosomal proteins and dependent signal transduction in the initiation and progression of various cancers. As a future perspective, the potential role of these moonlight ribosomal proteins in the diagnosis, prognosis, and development of novel strategies to improve the efficacy of therapies for human cancers has been suggested.
Collapse
Affiliation(s)
- Ghader Molavi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Molecular Medicine, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Nasser Samadi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Molecular Medicine, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Biochemistry, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | | |
Collapse
|
25
|
Wanner D, Steurer M. Chronic lymphocytic leukemia at ASH 2017. MEMO 2018; 11:105-108. [PMID: 29983825 PMCID: PMC6006235 DOI: 10.1007/s12254-018-0414-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 05/16/2018] [Indexed: 06/08/2023]
Abstract
At ASH (American Society of Hematology) 2017 three out of a plethora of trials showed remarkable and promising results. The combinations of venetoclax with rituximab and ibrutinib with venetoclax convinced with striking efficacy together with a manageable safety profile in relapsed/refractory setting as well as in first line therapy of high-risk disease. These two combinations are potential new standard treatment options in chronic lymphocytic leukemia.
Collapse
Affiliation(s)
- David Wanner
- Medical University Innsbruck, Innsbruck, Austria
| | | |
Collapse
|
26
|
Maimaiti Y, Dong L, Aili A, Maimaitiaili M, Huang T, Abudureyimu K. Bim may be a poor prognostic biomarker in breast cancer patients especially in those with luminal A tumors. Cancer Biomark 2018; 19:411-418. [PMID: 28582840 DOI: 10.3233/cbm-160377] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND Bcl-2 interacting mediator of cell death (Bim) appears to have contradictory roles in cancer. It is uncertain whether Bim show prognostic significance in patients with breast cancer. OBJECTIVE To investigate the correlation between Bim expression and clinicopathological characteristics of breast cancer and to evaluate Bim's effect on overall survival (OS). METHODS We used immunohistochemistry (IHC) technique to detect the expression of Bim via tissue microarray in 275 breast cancer samples, Kaplan-Meier analysis to perform survival analysis, and Cox proportional hazards regression model to explore the risk factors of breast cancer. RESULTS The results revealed that Bim expression was significantly correlated with age, estrogen receptor (ER) and/or progesterone receptor (PR), human epidermal growth factor receptor (HER2) and Ki67 expression (P< 0.05). Bim expression was significantly different in the four molecular subtypes (P= 0.000). Survival analysis showed that Bim positive expression contributed to a shorter OS (P= 0.034), especially in patients with luminal A tumors (P= 0.039). Univariate and multivariate regression analysis showed that Bim was an independent prognostic factor for breast cancer (P< 0.05). CONCLUSION Bim may serve as an effective predictive factor for lower OS in breast cancer patients, especially in those with luminal A tumors.
Collapse
Affiliation(s)
- Yusufu Maimaiti
- Department of General Surgery, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, China.,Department of General Surgery, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, China
| | - Lingling Dong
- Department of Breast and Thyroid Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.,Department of General Surgery, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, China
| | - Aikebaier Aili
- Department of General Surgery, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, China
| | - Maimaitiaili Maimaitiaili
- Department of General Surgery, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, China
| | - Tao Huang
- Department of Breast and Thyroid Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Kelimu Abudureyimu
- Department of General Surgery, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, China
| |
Collapse
|
27
|
Abstract
The mitogen activated protein kinase/extracellular signal-related kinase (MAPK/ERK) signaling pathway serves an integral role in growth, proliferation, differentiation, migration, and survival of all mammalian cells. Aberrant signaling of this pathway is often observed in several types of hematologic and solid malignancies. The most frequent insult to this signaling cascade, leading to its constitutive activation, is to the serine/threonine kinase rapidly accelerating fibrosarcoma (RAF). Considering this, the development and approval of various small-molecule inhibitors targeting the MAPK/ERK pathway has become a mainstay of treatment as either mono- or combination therapy in these cancers. Although effective initially, a major clinical barrier with these inhibitors is the relapse of patients due to drug resistance. Knowledge of the mechanisms of resistance to these drugs is still premature, highlighting the need for a more in-depth understanding of how patients become insensitive to these pharmacologic interventions. Herein, we will succinctly summarize the milestones in the approval of select MAPK/ERK pathway inhibitors, their use in patients, and major modes of resistance.
Collapse
Affiliation(s)
- Jaquelyn N Sanchez
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Ton Wang
- Department of Surgery, Michigan Medicine, 1500 E. Medical Center Drive, Ann Arbor, MI, USA
| | - Mark S Cohen
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, MI, USA.
- Department of Surgery, Michigan Medicine, 1500 E. Medical Center Drive, Ann Arbor, MI, USA.
| |
Collapse
|
28
|
Sandoval-Basilio J, González-González R, Bologna-Molina R, Isiordia-Espinoza M, Leija-Montoya G, Alcaraz-Estrada SL, Serafín-Higuera I, González-Ramírez J, Serafín-Higuera N. Epigenetic mechanisms in odontogenic tumors: A literature review. Arch Oral Biol 2018; 87:211-217. [PMID: 29310033 DOI: 10.1016/j.archoralbio.2017.12.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 12/23/2017] [Accepted: 12/28/2017] [Indexed: 02/07/2023]
Abstract
OBJECTIVE Epigenetic mechanisms, such as DNA methylation, regulate important biological processes as gene expression and it was suggested that these phenomena play important roles in the carcinogenesis and tumor biology. The aim of this review is to provide the current state of knowledge about epigenetic alterations, focusing mainly on DNA methylation, reported in odontogenic tumors. DESIGN Literatures were searched based in the combination of the following keywords: odontogenic tumors, epigenetics, DNA methylation, histone modifications, non-coding RNA, microRNA, DNA methyltransferases. Electronic databases (Medline/PubMed, Scopus and Web of Science) were screened. RESULTS The analysis of epigenetic alterations in different tumors has rapidly increased; however, limited information is available about epigenetic mechanisms involved in the formation of odontogenic tumors. DNA methylation is the most studied epigenetic modification in these tumors and the participation of non-coding RNA's in odontogenic tumors has been recently addressed. Differential expression of DNA methyltransferases, altered DNA methylation patterns and aberrant expression of non-coding RNA's were reported in odontogenic tumors. CONCLUSIONS Current studies suggest epigenetics as an emerging mechanism, possibly implicated in etiopathogenesis of odontogenic tumors. Deeper understanding of the epigenetic abnormalities in these tumors could show potential applications as biomarkers or therapeutic possibilities in the future.
Collapse
Affiliation(s)
| | | | - Ronell Bologna-Molina
- Departamento de Investigación, Facultad Odontología, Universidad de la República. (UDELAR), Montevideo, Uruguay
| | | | | | | | | | | | | |
Collapse
|
29
|
Aira LE, Villa E, Colosetti P, Gamas P, Signetti L, Obba S, Proics E, Gautier F, Bailly-Maitre B, Jacquel A, Robert G, Luciano F, Juin PP, Ricci JE, Auberger P, Marchetti S. The oncogenic tyrosine kinase Lyn impairs the pro-apoptotic function of Bim. Oncogene 2018; 37:2122-2136. [PMID: 29391601 DOI: 10.1038/s41388-017-0112-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 11/23/2017] [Accepted: 12/14/2017] [Indexed: 01/17/2023]
Abstract
Phosphorylation of Ser/Thr residues is a well-established modulating mechanism of the pro-apoptotic function of the BH3-only protein Bim. However, nothing is known about the putative tyrosine phosphorylation of this Bcl-2 family member and its potential impact on Bim function and subsequent Bax/Bak-mediated cytochrome c release and apoptosis. As we have previously shown that the tyrosine kinase Lyn could behave as an anti-apoptotic molecule, we investigated whether this Src family member could directly regulate the pro-apoptotic function of Bim. In the present study, we show that Bim is phosphorylated onto tyrosine residues 92 and 161 by Lyn, which results in an inhibition of its pro-apoptotic function. Mechanistically, we show that Lyn-dependent tyrosine phosphorylation of Bim increases its interaction with anti-apoptotic members such as Bcl-xL, therefore limiting mitochondrial outer membrane permeabilization and subsequent apoptosis. Collectively, our data uncover one molecular mechanism through which the oncogenic tyrosine kinase Lyn negatively regulates the mitochondrial apoptotic pathway, which may contribute to the transformation and/or the chemotherapeutic resistance of cancer cells.
Collapse
Affiliation(s)
| | - Elodie Villa
- Université Côte d'Azur, INSERM, C3M, Nice, France
| | | | | | | | | | - Emma Proics
- Université Côte d'Azur, INSERM, C3M, Nice, France
| | - Fabien Gautier
- CRCINA, UMR 1232 INSERM, Université de Nantes, Université d'Angers, Institut de Recherche en Santé-Université de Nantes, 8 Quai Moncousu - BP 70721, 44007, Nantes Cedex 1, France.,Institut de Cancérologie de l'Ouest, Bvd J Monod, Site René Gauducheau, 44805, Saint-Herblain, France
| | | | | | | | | | - Philippe P Juin
- CRCINA, UMR 1232 INSERM, Université de Nantes, Université d'Angers, Institut de Recherche en Santé-Université de Nantes, 8 Quai Moncousu - BP 70721, 44007, Nantes Cedex 1, France.,Institut de Cancérologie de l'Ouest, Bvd J Monod, Site René Gauducheau, 44805, Saint-Herblain, France
| | | | | | | |
Collapse
|
30
|
Hanson K, Robinson SD, Al-Yousuf K, Hendry AE, Sexton DW, Sherwood V, Wheeler GN. The anti-rheumatic drug, leflunomide, synergizes with MEK inhibition to suppress melanoma growth. Oncotarget 2017; 9:3815-3829. [PMID: 29423085 PMCID: PMC5790502 DOI: 10.18632/oncotarget.23378] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2017] [Accepted: 11/26/2017] [Indexed: 01/04/2023] Open
Abstract
Cutaneous melanoma, which develops from the pigment producing cells called melanocytes, is the most deadly form of skin cancer. Unlike the majority of other cancers, the incidence rates of melanoma are still on the rise and the treatment options currently available are being hindered by resistance, limited response rates and adverse toxicity. We have previously shown that an FDA approved drug leflunomide, used for rheumatoid arthritis (RA), also holds potential therapeutic value in treating melanoma especially if used in combination with the mutant BRAF inhibitor, vemurafenib. We have further characterized the function of leflunomide and show that the drug reduces the number of viable cells in both wild-type and BRAFV600E mutant melanoma cell lines. Further experiments have revealed leflunomide reduces cell proliferation and causes cells to arrest in G1 of the cell cycle. Cell death assays show leflunomide causes apoptosis at treatment concentrations of 25 and 50 µM. To determine if leflunomide could be used combinatorialy with other anti-melanoma drugs, it was tested in combination with the MEK inhibitor, selumetinib. This combination showed a synergistic effect in the cell lines tested. This drug combination led to an enhanced decrease in tumor size when tested in vivo compared to either drug alone, demonstrating its potential as a novel combinatorial therapy for melanoma.
Collapse
Affiliation(s)
- Kimberley Hanson
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Stephen D Robinson
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Karamallah Al-Yousuf
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK.,Present address: Division of Cancer Sciences, School of Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, DD1 9SY, UK
| | - Adam E Hendry
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Darren W Sexton
- Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK.,Present address: Pharmacy and Biomedical Sciences, Liverpool John Moores University, Liverpool, L3 3AF, UK
| | - Victoria Sherwood
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK.,Present address: Division of Cancer Sciences, School of Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, DD1 9SY, UK
| | - Grant N Wheeler
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| |
Collapse
|
31
|
Afaloniati H, Karagiannis GS, Hardas A, Poutahidis T, Angelopoulou K. Inflammation-driven colon neoplasmatogenesis in uPA-deficient mice is associated with an increased expression of Runx transcriptional regulators. Exp Cell Res 2017; 361:257-264. [DOI: 10.1016/j.yexcr.2017.10.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 10/23/2017] [Accepted: 10/24/2017] [Indexed: 02/06/2023]
|
32
|
Nikoonahad Lotfabadi N, Mohseni Kouchesfahani H, Sheikhha MH, Kalantar SM. In vitro transfection of anti-tumor miR-101 induces BIM, a pro-apoptotic protein, expression in acute myeloid leukemia (AML). EXCLI JOURNAL 2017; 16:1257-1267. [PMID: 29333128 PMCID: PMC5763080 DOI: 10.17179/excli2017-721] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Accepted: 11/11/2017] [Indexed: 12/14/2022]
Abstract
Acute myeloid leukemia (AML) frequently relapses after initial treatment, though it is possible that drug resistance occurs. Hence, it seems necessary to develop novel therapies such as gene therapy specifically via miRNA transfection. MicroRNA-101 has been considered as a tumor suppressor in different types of cancer. It is demonstrated that exogenous miR-101 transfection is associated with decreased viability in AML in this paper. Besides, the increase of pro-apoptotic protein BIM expression in both mRNA and protein level has been illustrated. The recent findings provide an insight into the novel function of miR-101 in AML by activating BIM as an important mediator in intrinsic apoptosis pathways. Generally, miR-101 has been considered as a therapeutic target in our data and might have a valuable role in AML.
Collapse
Affiliation(s)
- Narges Nikoonahad Lotfabadi
- Department of Animal Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran.,Biology Department, Faculty of Sciences, Science and Arts University, Yazd, Iran
| | | | - Mohammad Hasan Sheikhha
- Reproductive & Genetic Unit, Research and Clinical Center for Infertility, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.,Biotechnology Research Center, International Campus, Shahid Sadoughi University of Medical Science, Yazd, Iran
| | - Seyed Mehdi Kalantar
- Reproductive & Genetic Unit, Research and Clinical Center for Infertility, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| |
Collapse
|
33
|
Huang JP, Ling K. EZH2 and histone deacetylase inhibitors induce apoptosis in triple negative breast cancer cells by differentially increasing H3 Lys 27 acetylation in the BIM gene promoter and enhancers. Oncol Lett 2017; 14:5735-5742. [PMID: 29113202 PMCID: PMC5661363 DOI: 10.3892/ol.2017.6912] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Accepted: 03/30/2017] [Indexed: 11/21/2022] Open
Abstract
Enhancer of zeste homolog 2 (EZH2), a subunit of polycomb repressive complex 2, is a histone methyl-transferase and is considered to work cooperatively with histone deacetylases (HDACs) in the same protein complex to mediate gene transcription repression by increasing histone H3 Lys27 trimethylation (H3K27me3), in particular in the nucleosome (s). EZH2 is overexpressed in numerous types of cancer, including triple negative breast cancer (TNBC), a subtype of breast cancer, which there are no effective treatment options for. Thus, inhibition of EZH2 may be harnessed for targeted therapy of this disease. The present study demonstrated that co-treatment with an EZH2 inhibitor and a HDAC inhibitor additively induced apoptosis in two TNBC cell lines, namely MDA-MB-231 and MDA-MB-436. The increased rate of cell death was associated with an elevation of B cell lymphoma-2 like 11 (BIM) expression level, a pro-apoptotic protein at the protein and mRNA expression levels in these two cell lines. The expression of forkhead box O1 (FOXO1), a known upstream transcriptional activator of BIM, was upregulated in both cell lines by the HDAC inhibitor, and the effect was more pronounced in MDA-MB-436 cells with higher phosphorylation levels of protein kinase B, a negative regulator of FOXO1, compared with MDA-MB-231 cells. Conversely, FOXO1 expression was inhibited following treatment with the EZH2 inhibitor, suggesting that EZH2 and HDAC inhibitors induced BIM expression via a FOXO1-independent mechanism. The present study further revealed that the EZH2 inhibitor, but not the HDAC inhibitor, induced high levels of H3K27 acetylation (H3K27ac) in the BIM promoter. By contrast, compared with the effect of the EZH2 inhibitor, HDAC inhibitor treatment resulted in an increase in H3K27ac at two BIM enhancers. Collectively, the results of the present study indicated that EZH2 and HDACs act differentially on H3K27ac levels in the nucleosome at the promoter and enhancer regions of the BIM gene. Through the upregulation of BIM, co-treatment with EZH2 and HDAC inhibitors had a pronounced therapeutic effect on TNBC cells, suggesting that co-targeting EZH2 and HDAC proteins represents a viable therapeutic option for the treatment of TNBC.
Collapse
Affiliation(s)
- Julia P Huang
- Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA
| | - Kun Ling
- Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA
| |
Collapse
|
34
|
Geng Y, Zhou Y, Wu S, Hu Y, Lin K, Wang Y, Zheng Z, Wu W. Sulforaphane Induced Apoptosis via Promotion of Mitochondrial Fusion and ERK1/2-Mediated 26S Proteasome Degradation of Novel Pro-survival Bim and Upregulation of Bax in Human Non-Small Cell Lung Cancer Cells. J Cancer 2017; 8:2456-2470. [PMID: 28900483 PMCID: PMC5595075 DOI: 10.7150/jca.19383] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Accepted: 05/29/2017] [Indexed: 12/30/2022] Open
Abstract
Previous studies in our laboratory showed that sulforaphane (SFN) induced apoptosis by sustained activation of extracellular regulated protein kinases 1/2 (ERK1/2). However, the underlying mechanisms associated with SFN-induced apoptosis and downstream cascades which are modulated by ERK1/2 were not elucidated. Herein we demonstrated for the first time that alteration of mitochondrial dynamics contributed to SFN-induced apoptosis in human non-small cell lung cancer (NSCLC) cells. Reports showed that protein Bim not only induced apoptosis but also promoted proliferation under certain circumstances. We found that Bim was related to cell growth in NSCLC cells. Pro-survival Bim downregulation was shown to induce apoptosis in response to SFN. Further, Using the ERK1/2 inhibitor, PD98059, we found that SFN upregulated Bax and downregulated Bim through the ERK1/2-dependent signaling pathway. Furthermore, SFN activated ERK1/2 to increase 26S proteasome activity to degrade Bim, while the proteasome inhibitor MG132 reversed this effect. Therefore, SFN phosphorylated ERK1/2 and activated the proteasome system leading to the degradation of Bim, which contributed to apoptosis in NSCLC cells. These findings provided a novel insight into SFN-related therapeutics in cancer treatment.
Collapse
Affiliation(s)
- Yang Geng
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Yan Zhou
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Sai Wu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Yabin Hu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Kai Lin
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Yalin Wang
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Zhongnan Zheng
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Wei Wu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
- Institute of Brain Tumor, Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
| |
Collapse
|
35
|
Cerqueira DM, Bodnar AJ, Phua YL, Freer R, Hemker SL, Walensky LD, Hukriede NA, Ho J. Bim gene dosage is critical in modulating nephron progenitor survival in the absence of microRNAs during kidney development. FASEB J 2017; 31:3540-3554. [PMID: 28446592 PMCID: PMC5503708 DOI: 10.1096/fj.201700010r] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 04/11/2017] [Indexed: 12/18/2022]
Abstract
Low nephron endowment at birth has been associated with an increased risk for developing hypertension and chronic kidney disease. We demonstrated in an earlier study that conditional deletion of the microRNA (miRNA)-processing enzyme Dicer from nephron progenitors results in premature depletion of the progenitors and increased expression of the proapoptotic protein Bim (also known as Bcl-2L11). In this study, we generated a compound mouse model with conditional deletion of both Dicer and Bim, to determine the biologic significance of increased Bim expression in Dicer-deficient nephron progenitors. The loss of Bim partially restored the number of nephron progenitors and improved nephron formation. The number of progenitors undergoing apoptosis was significantly reduced in kidneys with loss of a single allele, or both alleles, of Bim compared to mutant kidneys. Furthermore, 2 miRNAs expressed in nephron progenitors (miR-17 and miR-106b) regulated Bim levels in vitro and in vivo Together, these data suggest that miRNA-mediated regulation of Bim controls nephron progenitor survival during nephrogenesis, as one potential means of regulating nephron endowment.-Cerqueira, D. M., Bodnar, A. J., Phua, Y. L., Freer, R., Hemker, S. L., Walensky, L. D., Hukriede, N. A., Ho, J. Bim gene dosage is critical in modulating nephron progenitor survival in the absence of microRNAs during kidney development.
Collapse
Affiliation(s)
- Débora M Cerqueira
- Division of Nephrology, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Andrew J Bodnar
- Division of Nephrology, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Yu Leng Phua
- Division of Nephrology, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Rachel Freer
- Division of Nephrology, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Shelby L Hemker
- Division of Nephrology, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Loren D Walensky
- Department of Pediatric Oncology and the Linde Program in Cancer Chemical Biology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
- Department of Pediatrics, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Neil A Hukriede
- Department of Developmental Biology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Jacqueline Ho
- Division of Nephrology, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA;
| |
Collapse
|
36
|
Costa SFS, Pereira NB, Pereira KMA, Campos K, de Castro WH, Diniz MG, Gomes CC, Gomez RS. DNA methylation pattern of apoptosis-related genes in ameloblastoma. Oral Dis 2017; 23:779-783. [DOI: 10.1111/odi.12661] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 02/08/2017] [Accepted: 02/24/2017] [Indexed: 02/07/2023]
Affiliation(s)
- SFS Costa
- Department of Oral Surgery and Pathology; School of Dentistry; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| | - NB Pereira
- Department of Oral Surgery and Pathology; School of Dentistry; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| | - KMA Pereira
- School of Dentistry; Universidade Federal do Ceará; Sobral Brazil
| | - K Campos
- Department of Oral Surgery and Pathology; School of Dentistry; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| | - WH de Castro
- Department of Oral Surgery and Pathology; School of Dentistry; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| | - MG Diniz
- Department of Oral Surgery and Pathology; School of Dentistry; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| | - CC Gomes
- Department of Pathology; Biological Sciences Institute; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| | - RS Gomez
- Department of Oral Surgery and Pathology; School of Dentistry; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
| |
Collapse
|
37
|
The IgM receptor FcμR limits tonic BCR signaling by regulating expression of the IgM BCR. Nat Immunol 2017; 18:321-333. [PMID: 28135254 PMCID: PMC5310993 DOI: 10.1038/ni.3677] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 12/22/2016] [Indexed: 12/25/2022]
Abstract
The IgM Fc receptor (FcμR), originally cloned as “Fas-apoptosis inhibitory molecule (FAIM3/TOSO)” can function as a cell surface receptor for secreted IgM on a variety of cell types. We report that FcμR also is expressed in the trans-Golgi network of developing B cells, where it constrains IgM- but not IgD-BCR transport. In FcμR absence, IgM-BCR surface expression was increased, resulting in enhanced tonic BCR signaling. B cell-specific FcμR-deficiency enhanced spontaneous differentiation of B-1 cells, resulting in increases in natural IgM levels, and dysregulated B-2 cell homeostasis, causing spontaneous germinal center formation, increased serum autoantibody titers, and excessive B cell accumulation. Thus, FcμR/FAIM3 is a critical regulator of B cell biology by constraining IgM-BCR transport and cell surface expression.
Collapse
|
38
|
Wu Y, Ma S, Xia Y, Lu Y, Xiao S, Cao Y, Zhuang S, Tan X, Fu Q, Xie L, Li Z, Yuan Z. Loss of GCN5 leads to increased neuronal apoptosis by upregulating E2F1- and Egr-1-dependent BH3-only protein Bim. Cell Death Dis 2017; 8:e2570. [PMID: 28125090 PMCID: PMC5386373 DOI: 10.1038/cddis.2016.465] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Revised: 12/06/2016] [Accepted: 12/12/2016] [Indexed: 12/24/2022]
Abstract
Cellular acetylation homeostasis is a kinetic balance precisely controlled by histone acetyl-transferase (HAT) and histone deacetylase (HDAC) activities. The loss of the counterbalancing function of basal HAT activity alters the precious HAT:HDAC balance towards enhanced histone deacetylation, resulting in a loss of acetylation homeostasis, which is closely associated with neuronal apoptosis. However, the critical HAT member whose activity loss contributes to neuronal apoptosis remains to be identified. In this study, we found that inactivation of GCN5 by either pharmacological inhibitors, such as CPTH2 and MB-3, or by inactivation with siRNAs leads to a typical apoptosis in cultured cerebellar granule neurons. Mechanistically, the BH3-only protein Bim is transcriptionally upregulated by activated Egr-1 and E2F1 and mediates apoptosis following GCN5 inhibition. Furthermore, in the activity withdrawal- or glutamate-evoked neuronal apoptosis models, GCN5 loses its activity, in contrast to Bim induction. Adenovirus-mediated overexpression of GCN5 suppresses Bim induction and apoptosis. Interestingly, the loss of GCN5 activity and the induction of Egr-1, E2F1 and Bim are involved in the early brain injury (EBI) following subarachnoid haemorrhage (SAH) in rats. HDAC inhibition not only significantly rescues Bim expression and apoptosis induced by either potassium deprivation or GCN5 inactivation but also ameliorates these events and EBI in SAH rats. Taken together, our results highlight a new mechanism by which the loss of GCN5 activity promotes neuronal apoptosis through the transcriptional upregulation of Bim, which is probably a critical event in triggering neuronal death when cellular acetylation homeostasis is impaired.
Collapse
Affiliation(s)
- Yanna Wu
- Department of Neurosurgery, the Second Affiliated Hospital and Institute of Neurosciences of Guangzhou Medical University, Guangzhou 510260, China
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and Ministry of Education of China, Guangzhou 510260, China
| | - Shanshan Ma
- Guangdong Province Key laboratory of Brain Function and Disease, Guangzhou 510006, China
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-sen University, 74 Zhongshan 2nd Road, Guangzhou 510080, China
| | - Yong Xia
- Department of Neurosurgery, the Second Affiliated Hospital and Institute of Neurosciences of Guangzhou Medical University, Guangzhou 510260, China
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and Ministry of Education of China, Guangzhou 510260, China
| | - Yangpeng Lu
- Department of Neurosurgery, the Second Affiliated Hospital and Institute of Neurosciences of Guangzhou Medical University, Guangzhou 510260, China
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and Ministry of Education of China, Guangzhou 510260, China
| | - Shiyin Xiao
- Department of Neurosurgery, the Second Affiliated Hospital and Institute of Neurosciences of Guangzhou Medical University, Guangzhou 510260, China
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and Ministry of Education of China, Guangzhou 510260, China
| | - Yali Cao
- Department of Neurosurgery, the Second Affiliated Hospital and Institute of Neurosciences of Guangzhou Medical University, Guangzhou 510260, China
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and Ministry of Education of China, Guangzhou 510260, China
| | - Sidian Zhuang
- Department of Neurosurgery, the Second Affiliated Hospital and Institute of Neurosciences of Guangzhou Medical University, Guangzhou 510260, China
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and Ministry of Education of China, Guangzhou 510260, China
| | - Xiangpeng Tan
- Department of Neurosurgery, the Second Affiliated Hospital and Institute of Neurosciences of Guangzhou Medical University, Guangzhou 510260, China
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and Ministry of Education of China, Guangzhou 510260, China
| | - Qiang Fu
- Department of General Dentistry, 323 Hospital of the People's Liberation Army, Xi'an, China
| | - Longchang Xie
- Department of Neurosurgery, the Second Affiliated Hospital and Institute of Neurosciences of Guangzhou Medical University, Guangzhou 510260, China
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and Ministry of Education of China, Guangzhou 510260, China
| | - Zhiming Li
- Department of Radiology, the Second Affiliated Hospital and Institute of Neurosciences of Guangzhou Medical University, Guangzhou 510260, China
| | - Zhongmin Yuan
- Department of Neurosurgery, the Second Affiliated Hospital and Institute of Neurosciences of Guangzhou Medical University, Guangzhou 510260, China
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and Ministry of Education of China, Guangzhou 510260, China
- Guangdong Province Key laboratory of Brain Function and Disease, Guangzhou 510006, China
| |
Collapse
|
39
|
Jiang W, Li X, Li T, Wang H, Shi W, Qi P, Li C, Chen J, Bao J, Huang G, Wang Y. Repositioning of amprenavir as a novel extracellular signal-regulated kinase-2 inhibitor and apoptosis inducer in MCF-7 human breast cancer. Int J Oncol 2017; 50:823-834. [PMID: 28197631 DOI: 10.3892/ijo.2017.3860] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 12/05/2016] [Indexed: 11/05/2022] Open
Abstract
Computational drug repositioning by virtually screening existing drugs for additional therapeutic usage could efficiently accelerate anticancer drug discovery. Herein, a library of 1447 Food and Drug Administration (FDA)-approved small molecule drugs was screened in silico for inhibitors of extracellular signal-regulated kinase 2 (ERK2). Then, in vitro kinase assay demonstrated amprenavir, a HIV-1 protease inhibitor, as a potential kinase inhibitor of ERK2. The in vivo kinase assay indicated that amprenavir could inhibit ERK2-mediated phosphorylation of BimEL at Ser69. Amprenavir could suppress this phosphorylation in MCF-7 cells, which may further facilitate the association of BimEL with several pro-survival molecules. Additionally, inhibition of ERK2-BimEL signaling pathway by amprenavir could contribute to its anti-proliferative and apoptosis-inducing activity in MCF-7 cells. Finally, in vivo tumor growth and immunohistochemical studies confirmed that amprenavir remarkably suppressed tumor proliferation and induce apoptosis in MCF-7 xenografts. Taken together, amprenavir can effectively inhibit the kinase activity of ERK2, and thus induces apoptosis and inhibits tumor growth in human MCF-7 cancer cells both in vitro and in vivo, making amprenavir a promising candidate for future anticancer therapeutics.
Collapse
Affiliation(s)
- Wenchun Jiang
- Nursing Department, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, Chengdu, Sichuan 610072, P.R. China
| | - Xin Li
- School of Life Sciences, Sichuan University, Chengdu, Sichuan 610065, P.R. China
| | - Tongyu Li
- Center for Nephropathy, Ruikang Hospital Affiliated to Guangxi University of Chinese Medicine, Nanning, Guangxi 530011, P.R. China
| | - Hailian Wang
- Center for Organ Transplantation, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, Chengdu, Sichuan 610072, P.R. China
| | - Wei Shi
- Department of Pediatrics, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, Chengdu, Sichuan 610072, P.R. China
| | - Ping Qi
- Department of Pediatrics, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, Chengdu, Sichuan 610072, P.R. China
| | - Chunyang Li
- School of Life Sciences, Sichuan University, Chengdu, Sichuan 610065, P.R. China
| | - Jie Chen
- Center for Organ Transplantation, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, Chengdu, Sichuan 610072, P.R. China
| | - Jinku Bao
- School of Life Sciences, Sichuan University, Chengdu, Sichuan 610065, P.R. China
| | - Guodong Huang
- Center for Nephropathy, Ruikang Hospital Affiliated to Guangxi University of Chinese Medicine, Nanning, Guangxi 530011, P.R. China
| | - Yi Wang
- Center for Organ Transplantation, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, Chengdu, Sichuan 610072, P.R. China
| |
Collapse
|
40
|
Mitochondrial ATF2 translocation contributes to apoptosis induction and BRAF inhibitor resistance in melanoma through the interaction of Bim with VDAC1. Oncotarget 2016; 6:36338-53. [PMID: 26462148 PMCID: PMC4742181 DOI: 10.18632/oncotarget.5537] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 09/29/2015] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND The mitochondrial accumulation of ATF2 is involved in tumor suppressor activities via cytochrome c release in melanoma cells. However, the signaling pathways that connect mitochondrial ATF2 accumulation and cytochrome c release are not well documented. METHODS Several melanoma cell lines, B16F10, K1735M2, A375 and A375-R1, were treated with paclitaxel and vemurafenib to test the function of mitochondrial ATF2 and its connection to Bim and voltage-dependent anion channel 1 (VDAC1). Immunoprecipitation analysis was performed to investigate the functional interaction between the involved proteins. VDAC1 oligomerization was evaluated using an EGS-based crosslinking assay. RESULTS The expression and migration of ATF2 to the mitochondria accounted for paclitaxel stimuli and acquired resistance to BRAF inhibitors. Mitochondrial ATF2 facilitated Bim stabilization through the inhibition of its degradation by the proteasome, thereby promoting cytochrome c release and inducing apoptosis in B16F10 and A375 cells. Studies using B16F10 and A375 cells genetically modified for ATF2 indicated that mitochondrial ATF2 was able to dissociate Bim from the Mcl-1/Bim complex to trigger VDAC1 oligomerization. Immunoprecipitation analysis revealed that Bim interacts with VDAC1, and this interaction was remarkably enhanced during apoptosis. CONCLUSION These results reveal that mitochondrial ATF2 is associated with the induction of apoptosis and BRAF inhibitor resistance through Bim activation, which might suggest potential novel therapies for the targeted induction of apoptosis in melanoma therapy.
Collapse
|
41
|
Shin JA, Kim LH, Lee SJ, Jeong JH, Jung JY, Lee HN, Hong IS, Cho SD. Targeting ERK1/2-bim signaling cascades by BH3-mimetic ABT-737 as an alternative therapeutic strategy for oral cancer. Oncotarget 2016; 6:35667-83. [PMID: 26447615 PMCID: PMC4742133 DOI: 10.18632/oncotarget.5523] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Accepted: 09/21/2015] [Indexed: 11/25/2022] Open
Abstract
To date, many different chemotherapeutic agents have been widely used as common treatments for oral cancers. However, their therapeutic effects have been disappointing, and these agents may have unwanted side effects. Among the many regulatory factors, overexpression of pro-survival Bcl-2 family members may promote resistance to chemotherapeutic drugs in many tumors. The BH3 domain-only proteins effectively antagonize their apoptotic activities. Therefore, there is substantial interest in developing chemotherapeutic drugs that directly target pro-survival Bcl-2 proteins by mimicking the BH3 domain and unleashing pro-apoptotic molecules in tumor cells. Among the numerous available small molecule BH3 mimetics, ABT-737, a potent small molecule that binds to Bcl-2/Bcl-xL with high affinity, has anti-tumor activity in a wide variety of cancer cells. However, the effects of ABT-737 on human oral cancers and the underlying molecular mechanisms have not previously been elucidated. In the present study, we observed that inactivation of the ERK1/2 signaling pathway using ABT-737 dramatically increased the expression of pro-apoptotic protein Bim via transcriptional and/or posttranslational regulation, in a cell type-dependent manner, inducing mitochondria-mediated apoptosis of human oral cancer cells. To the best of our knowledge, this is the first demonstration of the antitumor effects of ABT-737 on human oral cancers.
Collapse
Affiliation(s)
- Ji-Ae Shin
- Department of Oral Pathology, School of Dentistry, Institute of Biodegradable Material, Institute of Oral Bioscience, Chonbuk National University, Jeonju, Republic of Korea
| | - Lee-Han Kim
- Department of Oral Pathology, School of Dentistry, Institute of Biodegradable Material, Institute of Oral Bioscience, Chonbuk National University, Jeonju, Republic of Korea
| | - Sook-Jeong Lee
- Department of New Drug Discovery and Development, Chungnam National University, Daejon, Republic of Korea
| | - Joseph H Jeong
- Department of Dermatology and Biochemistry, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Ji-Youn Jung
- Department of Companion and Laboratory Animal Science, Kongju National University, Yesan, Republic of Korea
| | - Hae Nim Lee
- Department of Companion and Laboratory Animal Science, Kongju National University, Yesan, Republic of Korea
| | - In-Sun Hong
- Department of Molecular Medicine, School of Medicine, Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon, Republic of Korea
| | - Sung-Dae Cho
- Department of Oral Pathology, School of Dentistry, Institute of Biodegradable Material, Institute of Oral Bioscience, Chonbuk National University, Jeonju, Republic of Korea
| |
Collapse
|
42
|
Yadav N, Kumar S, Kumar R, Srivastava P, Sun L, Rapali P, Marlowe T, Schneider A, Inigo JR, O'Malley J, Londonkar R, Gogada R, Chaudhary AK, Yadava N, Chandra D. Mechanism of neem limonoids-induced cell death in cancer: Role of oxidative phosphorylation. Free Radic Biol Med 2016; 90:261-71. [PMID: 26627937 PMCID: PMC4734361 DOI: 10.1016/j.freeradbiomed.2015.11.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 11/01/2015] [Accepted: 11/23/2015] [Indexed: 12/17/2022]
Abstract
We have previously reported that neem limonoids (neem) induce multiple cancer cell death pathways. Here we dissect the underlying mechanisms of neem-induced apoptotic cell death in cancer. We observed that neem-induced caspase activation does not require Bax/Bak channel-mediated mitochondrial outer membrane permeabilization, permeability transition pore, and mitochondrial fragmentation. Neem enhanced mitochondrial DNA and mitochondrial biomass. While oxidative phosphorylation (OXPHOS) Complex-I activity was decreased, the activities of other OXPHOS complexes including Complex-II and -IV were unaltered. Increased reactive oxygen species (ROS) levels were associated with an increase in mitochondrial biomass and apoptosis upon neem exposure. Complex-I deficiency due to the loss of Ndufa1-encoded MWFE protein inhibited neem-induced caspase activation and apoptosis, but cell death induction was enhanced. Complex II-deficiency due to the loss of succinate dehydrogenase complex subunit C (SDHC) robustly decreased caspase activation, apoptosis, and cell death. Additionally, the ablation of Complexes-I, -III, -IV, and -V together did not inhibit caspase activation. Together, we demonstrate that neem limonoids target OXPHOS system to induce cancer cell death, which does not require upregulation or activation of proapoptotic Bcl-2 family proteins.
Collapse
Affiliation(s)
- Neelu Yadav
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA.
| | - Sandeep Kumar
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Rahul Kumar
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Pragya Srivastava
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Leimin Sun
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA; Gastroenterology Department, Sir Run Run Shaw Hospital, Zhejiang University Medical School, Hangzhou 310016, China
| | - Peter Rapali
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Timothy Marlowe
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Andrea Schneider
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Joseph R Inigo
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Jordan O'Malley
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Ramesh Londonkar
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Raghu Gogada
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Ajay K Chaudhary
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Nagendra Yadava
- Pioneer Valley Life Sciences Institute, Springfield, MA 01107, USA
| | - Dhyan Chandra
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA.
| |
Collapse
|
43
|
Sionov RV, Vlahopoulos SA, Granot Z. Regulation of Bim in Health and Disease. Oncotarget 2015; 6:23058-134. [PMID: 26405162 PMCID: PMC4695108 DOI: 10.18632/oncotarget.5492] [Citation(s) in RCA: 136] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 08/08/2015] [Indexed: 11/25/2022] Open
Abstract
The BH3-only Bim protein is a major determinant for initiating the intrinsic apoptotic pathway under both physiological and pathophysiological conditions. Tight regulation of its expression and activity at the transcriptional, translational and post-translational levels together with the induction of alternatively spliced isoforms with different pro-apoptotic potential, ensure timely activation of Bim. Under physiological conditions, Bim is essential for shaping immune responses where its absence promotes autoimmunity, while too early Bim induction eliminates cytotoxic T cells prematurely, resulting in chronic inflammation and tumor progression. Enhanced Bim induction in neurons causes neurodegenerative disorders including Alzheimer's, Parkinson's and Huntington's diseases. Moreover, type I diabetes is promoted by genetically predisposed elevation of Bim in β-cells. On the contrary, cancer cells have developed mechanisms that suppress Bim expression necessary for tumor progression and metastasis. This review focuses on the intricate network regulating Bim activity and its involvement in physiological and pathophysiological processes.
Collapse
Affiliation(s)
- Ronit Vogt Sionov
- Department of Developmental Biology and Cancer Research, Institute for Medical Research Israel Canada, Hebrew University, Hadassah Medical School, Jerusalem, Israel
| | - Spiros A. Vlahopoulos
- First Department of Pediatrics, University of Athens, Horemeio Research Laboratory, Thivon and Levadias, Goudi, Athens, Greece
| | - Zvi Granot
- Department of Developmental Biology and Cancer Research, Institute for Medical Research Israel Canada, Hebrew University, Hadassah Medical School, Jerusalem, Israel
| |
Collapse
|
44
|
Chaudhary AK, Yadav N, Bhat TA, O'Malley J, Kumar S, Chandra D. A potential role of X-linked inhibitor of apoptosis protein in mitochondrial membrane permeabilization and its implication in cancer therapy. Drug Discov Today 2015; 21:38-47. [PMID: 26232549 DOI: 10.1016/j.drudis.2015.07.014] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 07/09/2015] [Accepted: 07/21/2015] [Indexed: 12/17/2022]
Abstract
X-chromosome-linked inhibitor of apoptosis protein (XIAP) has an important regulatory role in programmed cell death by inhibiting the caspase cascade. Activation of XIAP-dependent signaling culminates into regulation of multiple cellular processes including apoptosis, innate immunity, epithelial-to-mesenchymal transition, cell migration, invasion, metastasis and differentiation. Although XIAP localizes to the cytosolic compartment, XIAP-mediated cellular signaling encompasses mitochondrial and post-mitochondrial levels. Recent findings demonstrate that XIAP also localizes to mitochondria and regulates mitochondria functions. XIAP acts upstream of mitochondrial cytochrome c release and modulates caspase-dependent apoptosis. The new function of XIAP has potential to enhance mitochondrial membrane permeabilization and other cellular functions controlling cytochrome c release. These findings could exploit the overexpression of XIAP in human tumors for therapeutic benefits.
Collapse
Affiliation(s)
- Ajay K Chaudhary
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Neelu Yadav
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Tariq A Bhat
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Jordan O'Malley
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Sandeep Kumar
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Dhyan Chandra
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| |
Collapse
|
45
|
Kitamura H, Ozono E, Iwanaga R, Bradford AP, Okuno J, Shimizu E, Kurayoshi K, Kugawa K, Toh H, Ohtani K. Identification of novel target genes specifically activated by deregulated E2F in human normal fibroblasts. Genes Cells 2015. [PMID: 26201719 DOI: 10.1111/gtc.12268] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The transcription factor E2F is the principal target of the tumor suppressor pRB. E2F plays crucial roles not only in cell proliferation by activating growth-related genes but also in tumor suppression by activating pro-apoptotic and growth-suppressive genes. We previously reported that, in human normal fibroblasts, the tumor suppressor genes ARF, p27(Kip1) and TAp73 are activated by deregulated E2F activity induced by forced inactivation of pRB, but not by physiological E2F activity induced by growth stimulation. In contrast, growth-related E2F targets are activated by both E2F activities, underscoring the roles of deregulated E2F in tumor suppression in the context of dysfunctional pRB. In this study, to further understand the roles of deregulated E2F, we explored new targets that are specifically activated by deregulated E2F using DNA microarray. The analysis identified nine novel targets (BIM, RASSF1, PPP1R13B, JMY, MOAP1, RBM38, ABTB1, RBBP4 and RBBP7), many of which are involved in the p53 and RB tumor suppressor pathways. Among these genes, the BIM gene was shown to be activated via atypical E2F-responsive promoter elements and to contribute to E2F1-mediated apoptosis. Our results underscore crucial roles of deregulated E2F in growth suppression to counteract loss of pRB function.
Collapse
Affiliation(s)
- Hodaka Kitamura
- Department of Biomedical Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Eiko Ozono
- Signalling Laboratory, The Babraham Institute, Babraham Research Campus, Cambridge, CB22 3AT, UK
| | - Ritsuko Iwanaga
- Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Anschutz Medical Campus, 12800 East 19th Avenue, Aurora, CO, 80045, USA
| | - Andrew P Bradford
- Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Anschutz Medical Campus, 12800 East 19th Avenue, Aurora, CO, 80045, USA
| | - Junko Okuno
- Department of Biomedical Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Emi Shimizu
- Department of Biomedical Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Kenta Kurayoshi
- Department of Biomedical Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Kazuyuki Kugawa
- Department of Biomedical Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Hiroyuki Toh
- Department of Biomedical Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Kiyoshi Ohtani
- Department of Biomedical Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| |
Collapse
|
46
|
Vesela B, Matalova E. Detection of Bim and Puma in mouse hair follicles using immunofluorescence and TUNEL assay double staining. Biotech Histochem 2015; 90:587-93. [DOI: 10.3109/10520295.2015.1062916] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
47
|
Wang C, Huang SB, Yang MC, Lin YT, Chu IH, Shen YN, Chiu YH, Hung SH, Kang L, Hong YR, Chen CH. Combining paclitaxel with ABT-263 has a synergistic effect on paclitaxel resistant prostate cancer cells. PLoS One 2015; 10:e0120913. [PMID: 25811469 PMCID: PMC4374961 DOI: 10.1371/journal.pone.0120913] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2014] [Accepted: 02/09/2015] [Indexed: 01/01/2023] Open
Abstract
We assessed the capability of paclitaxel, one of the taxanes, to induce death in two prostate cancer lines, LNCaP and PC3. Paclitaxel drove an apoptotic pathway in LNCaP, but not in PC3 cells, in response to G2/M arrest. An examination of the levels of anti-apoptotic proteins revealed that Bcl-xl was much higher in PC3 cells than in LNCaP cells and Bcl2 could be detected only in PC3 cells, not in LNCaP cells. Knocking down Bcl-xl enhanced paclitaxel-induced apoptosis in LNCaP cells, while we were unable to knock down Bcl-xl efficiently in PC3 cells. Significantly, a comparison of ABT-263, a specific inhibitor of Bcl2 and Bcl-xl, with ABT-199, a Bcl2 selective inhibitor, disclosed that only ABT-263, not ABT-199, could induce apoptosis in LNCaP and PC3 cells. The results indicate that Bcl-xl has a protective role against paclitaxel-induced apoptosis in LNCaP and PC3 cells, and its overexpression causes the paclitaxel resistance seen in PC3 cells. Interestingly, combined paclitaxel with ABT-263 to treat LNCaP and PC3 cells demonstrated synergistic apoptosis activation, indicating that ABT-263 could enhance paclitaxel-induced apoptosis in LNCaP cells and overcome Bcl-xl overexpression to trigger paclitaxel-induced apoptosis in PC3 cells. We also observed that the activation of apoptosis in LNCaP cells was more efficient than in PC3 cells in response to paclitaxel plus ABT-263 or to ABT-263 alone, suggesting that the apoptosis pathway in PC3 cells might have further differences from that in LNCaP cells even after Bcl-xl overexpression is accounted for.
Collapse
Affiliation(s)
- Chihuei Wang
- Department of Biotechnology, Kaohsiung Medical University, Kaohsiung, Taiwan
- * E-mail: (CW); (CHC)
| | - Shih-Bo Huang
- Department of Biotechnology, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Min-Chi Yang
- Department of Biotechnology, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yi-Tsen Lin
- Department of Biotechnology, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - I-Hung Chu
- Department of Biotechnology, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Ya-Ni Shen
- Department of Biotechnology, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yueh-Ho Chiu
- Department of Biotechnology, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Shao-Hung Hung
- Department of Orthopedic Surgery, Fooyin University Hospital, Pinutung, Taiwan
| | - Lin Kang
- Graduate Institute of Clinical Medicine, National Cheng Kung University, Tainan City, Taiwan
- Department of Obstetrics and Gynecology, National Cheng Kung University Hospital, Tainan City, Taiwan
| | - Yi-Ren Hong
- Department of Biochemistry, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chung-Hwan Chen
- Department of Orthopedics, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Orthopedics, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
- * E-mail: (CW); (CHC)
| |
Collapse
|
48
|
Duncan J, Wang N, Zhang X, Johnson S, Harris S, Zheng B, Zhang Q, Rajkowska G, Miguel-Hidalgo JJ, Sittman D, Ou XM, Stockmeier CA, Wang JM. Chronic Social Stress and Ethanol Increase Expression of KLF11, a Cell Death Mediator, in Rat Brain. Neurotox Res 2015; 28:18-31. [PMID: 25739536 DOI: 10.1007/s12640-015-9524-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Revised: 01/20/2015] [Accepted: 02/19/2015] [Indexed: 02/06/2023]
Abstract
Major depressive disorder and alcoholism are significant health burdens that can affect executive functioning, cognitive ability, job responsibilities, and personal relationships. Studies in animal models related to depression or alcoholism reveal that the expression of Krüppel-like factor 11 (KLF11, also called TIEG2) is elevated in frontal cortex, which suggests that KLF11 may play a role in stress- or ethanol-induced psychiatric conditions. KLF11 is a transcriptional activator of monoamine oxidase A and B, but also serves other functions in cell cycle regulation and apoptotic cell death. In the present study, immunohistochemistry was used to quantify intensity of nuclear KLF11, combined with an unbiased stereological approach to assess nuclei in fronto-limbic, limbic, and other brain regions of rats exposed chronically to social defeat or ethanol. KLF11 immunoreactivity was increased significantly in the medial prefrontal cortex, frontal cortex, and hippocampus of both stressed rats and rats fed ethanol. However, expression of KLF11 protein was not significantly affected in the thalamus, hypothalamus, or amygdala in either treatment group compared to respective control rats. Triple-label immunofluorescence revealed that KLF11 protein was localized in nuclei of neurons and astrocytes. KLF11 was also co-localized with the immunoreactivity of cleaved caspase-3. In addition, Western blot analysis revealed a significant reduction in anti-apoptotic protein, Bcl-xL, but an increase of caspase-3 expression in the frontal cortex of ethanol-treated rats compared to ethanol-preferring controls. Thus, KLF11 protein is up-regulated following chronic exposure to stress or ethanol in a region-specific manner and may contribute to pro-apoptotic signaling in ethanol-treated rats. Further investigation into the KLF11 signaling cascade as a mechanism for neurotoxicity and cell death in depression and alcoholism may provide novel pharmacological targets to lessen brain damage and maximize neuroprotection in these disorders.
Collapse
Affiliation(s)
- Jeremy Duncan
- Program in Neuroscience, University of Mississippi Medical Center, Jackson, MS, USA
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Jin HO, Lee YH, Park JA, Lee HN, Kim JH, Kim JY, Kim B, Hong SE, Kim HA, Kim EK, Noh WC, Kim JI, Chang YH, Hong SI, Hong YJ, Park IC, Lee JK. Piperlongumine induces cell death through ROS-mediated CHOP activation and potentiates TRAIL-induced cell death in breast cancer cells. J Cancer Res Clin Oncol 2014; 140:2039-46. [PMID: 25023940 DOI: 10.1007/s00432-014-1777-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 07/05/2014] [Indexed: 12/22/2022]
Abstract
PURPOSE Piperlongumine (PL) has been shown to selectively induce apoptotic cell death in cancer cells via reactive oxygen species (ROS) accumulation. In this study, we characterized a molecular mechanism for PL-induced cell death. METHODS Cell viability and cell death were assessed by MTT assay and Annexin V-FITC/PI staining, respectively. ROS generation was measured using the H2DCFDA. Small interfering RNA (siRNA) was used for suppressing gene expression. The mRNA and protein expression were analyzed by RT-PCR and Western blot analysis, respectively. RESULTS We found that PL promotes C/EBP homologous protein (CHOP) induction, which leads to the up-regulation of its targets Bim and DR5. Pretreatment with the ROS scavenger N-acetyl-cysteine abolishes the PL-induced up-regulation of CHOP and its target genes, suggesting an essential role for ROS in PL-induced CHOP activation. The down-regulation of CHOP or Bim with siRNA efficiently attenuates PL-induced cell death, suggesting a critical role for CHOP in this cell death. Furthermore, PL potentiates TRAIL-induced cytotoxicity in breast cancer cells by upregulating DR5, as DR5 knockdown abolished the sensitizing effect of PL on TRAIL responses. CONCLUSIONS Overall, our data suggest a new mechanism for the PL-induced cell death in which ROS mediates CHOP activation, and combination treatment with PL and TRAIL could be a potential strategy for breast cancer therapy.
Collapse
Affiliation(s)
- Hyeon-Ok Jin
- KIRAMS Radiation Biobank, Korea Institute of Radiological and Medical Sciences, 75 Nowon-ro, Nowon-gu, Seoul, 139-709, Republic of Korea
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Pro-apoptotic Bim suppresses breast tumor cell metastasis and is a target gene of SNAI2. Oncogene 2014; 34:3926-34. [PMID: 25263453 DOI: 10.1038/onc.2014.313] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 08/09/2014] [Accepted: 08/17/2014] [Indexed: 12/21/2022]
Abstract
Evasion of cell death is fundamental to the development of cancer and its metastasis. The role of the BCL-2-mediated (intrinsic) apoptotic program in these processes remains poorly understood. Here we have investigated the relevance of the pro-apoptotic protein BIM to breast cancer progression using the MMTV-Polyoma middle-T (PyMT) transgenic model. BIM deficiency in PyMT females did not affect primary tumor growth, but substantially increased the survival of metastatic cells within the lung. These data reveal a role for BIM in the suppression of breast cancer metastasis. Intriguingly, we observed a striking correlation between the expression of BIM and the epithelial to mesenchymal transition transcription factor SNAI2 at the proliferative edge of the tumors. Overexpression and knockdown studies confirmed that these two genes were coordinately expressed, and chromatin immunoprecipitation analysis further revealed that Bim is a target of SNAI2. Taken together, our findings suggest that SNAI2-driven BIM-induced apoptosis may temper metastasis by governing the survival of disseminating breast tumor cells.
Collapse
|