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Shi JJ, Wang YK, Wang MQ, Deng J, Gao N, Li M, Li YP, Zhang X, Jia XL, Liu XT, Dang SS, Wang WJ. Prohibitin 1 inhibits cell proliferation and induces apoptosis via the p53-mediated mitochondrial pathway in vitro. World J Gastrointest Oncol 2024; 16:398-413. [PMID: 38425403 PMCID: PMC10900163 DOI: 10.4251/wjgo.v16.i2.398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 11/23/2023] [Accepted: 01/09/2024] [Indexed: 02/02/2024] Open
Abstract
BACKGROUND Prohibitin 1 (PHB1) has been identified as an antiproliferative protein that is highly conserved and ubiquitously expressed, and it participates in a variety of essential cellular functions, including apoptosis, cell cycle regulation, proliferation, and survival. Emerging evidence indicates that PHB1 may play an important role in the progression of hepatocellular carcinoma (HCC). However, the role of PHB1 in HCC is controversial. AIM To investigate the effects of PHB1 on the proliferation and apoptosis of human HCC cells and the relevant mechanisms in vitro. METHODS HCC patients and healthy individuals were enrolled in this study according to the inclusion and exclusion criteria; then, PHB1 levels in the sera and liver tissues of these participates were determined using ELISA, RT-PCR, and immunohistochemistry. Human HepG2 and SMMC-7721 cells were transfected with the pEGFP-PHB1 plasmid and PHB1-specific shRNA (shRNA-PHB1) for 24-72 h. Cell proliferation was analysed with an MTT assay. Cell cycle progression and apoptosis were analysed using flow cytometry (FACS). The mRNA and protein expression levels of the cell cycle-related molecules p21, Cyclin A2, Cyclin E1, and CDK2 and the cell apoptosis-related molecules cytochrome C (Cyt C), p53, Bcl-2, Bax, caspase 3, and caspase 9 were measured by real-time PCR and Western blot, respectively. RESULTS Decreased levels of PHB1 were found in the sera and liver tissues of HCC patients compared to those of healthy individuals, and decreased PHB1 was positively correlated with low differentiation, TNM stage III-IV, and alpha-fetoprotein ≥ 400 μg/L. Overexpression of PHB1 significantly inhibited human HCC cell proliferation in a time-dependent manner. FACS revealed that the overexpression of PHB1 arrested HCC cells in the G0/G1 phase of the cell cycle and induced apoptosis. The proportion of cells in the G0/G1 phase was significantly increased and the proportion of cells in the S phase was decreased in HepG2 cells that were transfected with pEGFP-PHB1 compared with untreated control and empty vector-transfected cells. The percentage of apoptotic HepG2 cells that were transfected with pEGFP-PHB1 was 15.41% ± 1.06%, which was significantly greater than that of apoptotic control cells (3.65% ± 0.85%, P < 0.01) and empty vector-transfected cells (4.21% ± 0.52%, P < 0.01). Similar results were obtained with SMMC-7721 cells. Furthermore, the mRNA and protein expression levels of p53, p21, Bax, caspase 3, and caspase 9 were increased while the mRNA and protein expression levels of Cyclin A2, Cyclin E1, CDK2, and Bcl-2 were decreased when PHB1 was overexpressed in human HCC cells. However, when PHB1 was upregulated in human HCC cells, Cyt C expression levels were increased in the cytosol and decreased in the mitochondria, which indicated that Cyt C had been released into the cytosol. Conversely, these effects were reversed when PHB1 was knocked down. CONCLUSION PHB1 inhibits human HCC cell viability by arresting the cell cycle and inducing cell apoptosis via activation of the p53-mediated mitochondrial pathway.
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Affiliation(s)
- Juan-Juan Shi
- Department of Infectious Diseases, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Yi-Kai Wang
- Department of Infectious Diseases, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Mu-Qi Wang
- Department of Infectious Diseases, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Jiang Deng
- Department of Infectious Diseases, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Ning Gao
- Department of Infectious Diseases, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Mei Li
- Department of Infectious Diseases, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Ya-Ping Li
- Department of Infectious Diseases, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Xin Zhang
- Department of Infectious Diseases, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Xiao-Li Jia
- Department of Infectious Diseases, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Xiong-Tao Liu
- Department of Operating Room, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Shuang-Suo Dang
- Department of Infectious Diseases, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Wen-Jun Wang
- Department of Infectious Diseases, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi'an 710004, Shaanxi Province, China
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Sun QJ, Liu T. Subcellular distribution of prohibitin 1 in rat liver during liver regeneration and its cellular implication. World J Hepatol 2024; 16:65-74. [PMID: 38313239 PMCID: PMC10835489 DOI: 10.4254/wjh.v16.i1.65] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 11/03/2023] [Accepted: 11/28/2023] [Indexed: 01/23/2024] Open
Abstract
BACKGROUND The function of prohibitin 1 (Phb1) during liver regeneration (LR) remains relatively unexplored. Our previous research identified downregulation of Phb1 in rat liver mitochondria 24 h after 70% partial hepatectomy (PHx), as determined by subcellular proteomic analysis. AIM To investigate the potential role of Phb1 during LR. METHODS We examined changes in Phb1 mRNA and protein levels, subcellular distribution, and abundance in rat liver during LR following 70% PHx. We also evaluated mitochondrial changes and apoptosis using electron microscopy and flow cytometry. RNA-interference-mediated knockdown of Phb1 (PHBi) was performed in BRL-3A cells. RESULTS Compared with sham-operation control groups, Phb1 mRNA and protein levels in 70% PHx test groups were downregulated at 24 h, then upregulated at 72 and 168 h. Phb1 was mainly located in mitochondria, showed a reduced abundance at 24 h, significantly increased at 72 h, and almost recovered to normal at 168 h. Phb1 was also present in nuclei, with continuous increase in abundance observed 72 and 168 h after 70% PHx. The altered ultrastructure and reduced mass of mitochondria during LR had almost completely recovered to normal at 168 h. PHBi in BRL-3A cells resulted in increased S-phase entry, a higher number of apoptotic cells, and disruption of mitochondrial membrane potential. CONCLUSION Phb1 may contribute to maintaining mitochondrial stability and could play a role in regulating cell proliferation and apoptosis of rat liver cells during LR.
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Affiliation(s)
- Qing-Ju Sun
- Department of Clinical Laboratory, Navy No. 971 Hospital, Qingdao 266072, Shandong Province, China
| | - Tao Liu
- Department of Infectious Diseases, Navy No. 971 Hospital, Qingdao 266071, Shandong Province, China.
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Koushyar S, Uysal-Onganer P, Jiang WG, Dart DA. Prohibitin Links Cell Cycle, Motility and Invasion in Prostate Cancer Cells. Int J Mol Sci 2023; 24:9919. [PMID: 37373067 PMCID: PMC10298516 DOI: 10.3390/ijms24129919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 05/22/2023] [Accepted: 06/01/2023] [Indexed: 06/29/2023] Open
Abstract
Prohibitin (PHB) is a tumour suppressor gene with several different molecular activities. PHB overexpression leads to G1/S-phase cell cycle arrest, and PHB represses the androgen receptor (AR) in prostate cancer cells. PHB interacts with and represses members of the E2F family in a manner that may also be AR-linked, therefore making the AR:PHB:E2F interaction axis highly complex. PHB siRNA increased the growth and metastatic potential of LNCaP mouse xenografts in vivo. Conversely, PHB ectopic cDNA overexpression affected several hundred genes in LNCaP cells. Furthermore, gene ontology analysis showed that in addition to cell cycle regulation, several members of the WNT family were significantly downregulated (WNT7B, WNT9A and WNT10B), as well as pathways for cell adhesion. Online GEO data studies showed PHB expression to be decreased in clinical cases of metastatic prostate cancer, and to be correlated with higher WNT expression in metastasis. PHB overexpression reduced prostate cancer cell migration and motility in wound-healing assays, reduced cell invasion through a Matrigel layer and reduced cellular attachment. In LNCaP cells, WNT7B, WNT9A and WNT10B expression were also upregulated by androgen treatment and downregulated by androgen antagonism, indicating a role for AR in the control of these WNT genes. However, these WNTs were strongly cell cycle regulated. E2F1 cDNA ectopic expression and PHB siRNA (both cell cycle promoting effects) increased WNT7B, WNT9A and WNT10B expression, and these genes were also upregulated as cells were released from G1 to S phase synchronisation, indicating further cell cycle regulation. Therefore, the repressive effects of PHB may inhibit AR, E2F and WNT expression and its loss may increase metastatic potential in human prostate cancer.
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Affiliation(s)
- Sarah Koushyar
- Cardiff China Medical Research Collaborative, School of Medicine, Cardiff University, Cardiff CF14 4YS, UK
| | - Pinar Uysal-Onganer
- Cancer Mechanisms and Biomarkers Research Group, School of Life Sciences, College of Liberal Arts and Sciences, University of Westminster, 115 New Cavendish Street, London W1W 6UW, UK
| | - Wen Guo Jiang
- Cardiff China Medical Research Collaborative, School of Medicine, Cardiff University, Cardiff CF14 4YS, UK
| | - Dafydd Alwyn Dart
- Cardiff China Medical Research Collaborative, School of Medicine, Cardiff University, Cardiff CF14 4YS, UK
- Institute of Medical and Biomedical Education, St George’s University of London, Cranmer Terrace, Tooting, London SW17 0RE, UK
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Liu J, Zhang R, Su T, Zhou Q, Gao L, He Z, Wang X, Zhao J, Xing Y, Sun F, Cai W, Wang X, Han J, Qin R, Désaubry L, Han B, Chen W. Targeting PHB1 to inhibit castration-resistant prostate cancer progression in vitro and in vivo. J Exp Clin Cancer Res 2023; 42:128. [PMID: 37210546 DOI: 10.1186/s13046-023-02695-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 05/01/2023] [Indexed: 05/22/2023] Open
Abstract
BACKGROUND Castration-resistant prostate cancer (CRPC) is currently the main challenge for prostate cancer (PCa) treatment, and there is an urgent need to find novel therapeutic targets and drugs. Prohibitin (PHB1) is a multifunctional chaperone/scaffold protein that is upregulated in various cancers and plays a pro-cancer role. FL3 is a synthetic flavagline drug that inhibits cancer cell proliferation by targeting PHB1. However, the biological functions of PHB1 in CRPC and the effect of FL3 on CRPC cells remain to be explored. METHODS Several public datasets were used to analyze the association between the expression level of PHB1 and PCa progression as well as outcome in PCa patients. The expression of PHB1 in human PCa specimens and PCa cell lines was examined by immunohistochemistry (IHC), qRT-PCR, and Western blot. The biological roles of PHB1 in castration resistance and underlying mechanisms were investigated by gain/loss-of-function analyses. Next, in vitro and in vivo experiments were conducted to investigate the anti-cancer effects of FL3 on CRPC cells as well as the underlying mechanisms. RESULTS PHB1 expression was significantly upregulated in CRPC and was associated with poor prognosis. PHB1 promoted castration resistance of PCa cells under androgen deprivation condition. PHB1 is an androgen receptor (AR) suppressive gene, and androgen deprivation promoted the PHB1 expression and its nucleus-cytoplasmic translocation. FL3, alone or combined with the second-generation anti-androgen Enzalutamide (ENZ), suppressed CRPC cells especially ENZ-sensitive CRPC cells both in vitro and in vivo. Mechanically, we demonstrated that FL3 promoted trafficking of PHB1 from plasma membrane and mitochondria to nucleus, which in turn inhibited AR signaling as well as MAPK signaling, yet promoted apoptosis in CRPC cells. CONCLUSION Our data indicated that PHB1 is aberrantly upregulated in CRPC and is involved in castration resistance, as well as providing a novel rational approach for treating ENZ-sensitive CRPC.
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Affiliation(s)
- Junmei Liu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Ranran Zhang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Pathology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Tong Su
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Pathology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Qianqian Zhou
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Pathology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Lin Gao
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Pathology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Zongyue He
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Pathology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Xin Wang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Pathology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Jian Zhao
- Department of Thoracic Surgery, Qilu Hospital of Shandong University, Jinan, China
| | - Yuanxin Xing
- Research Center of Basic Medicine, Jinan Central Hospital, Shandong First Medical University, Jinan, China
| | - Feifei Sun
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Pathology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Wenjie Cai
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Pathology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Xinpei Wang
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Pathology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Jingying Han
- School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Ruixi Qin
- Department of Pathology, Qilu Hospital of Shandong University, Jinan, China
| | - Laurent Désaubry
- INSERM, UMR 1260, Regenerative Nanomedicine, University of Strasbourg, FMTS (Fédération de Médecine Translationnelle de L'Université de Strasbourg), Strasbourg, France
| | - Bo Han
- The Key Laboratory of Experimental Teratology, Ministry of Education and Department of Pathology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China.
- Department of Pathology, Qilu Hospital of Shandong University, Jinan, China.
| | - Weiwen Chen
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China.
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McGovern AJ, González J, Ramírez D, Barreto GE. Identification of HMGCR, PPGARG and prohibitin as potential druggable targets of dihydrotestosterone for treatment against traumatic brain injury using system pharmacology. Int Immunopharmacol 2022; 108:108721. [PMID: 35344815 DOI: 10.1016/j.intimp.2022.108721] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 03/11/2022] [Accepted: 03/18/2022] [Indexed: 02/07/2023]
Abstract
BACKGROUND Traumatic Brain Injury (TBI) has long-term devastating effects for which there is no accurate and effective treatment for inflammation and chronic oxidative stress. As a disease that affects multiple signalling pathways, the search for a drug with a broader spectrum of pharmacological action is of clinical interest. The fact that endocrine disruption (e.g hypogonadism) has been observed in TBI patients suggests that endogenous therapy with testosterone, or its more androgenic derivative, dihydrotestosterone (DHT), may attenuate, at least in part, the TBI-induced inflammation, but the underlying molecular mechanisms by which this occurs are still not completely clear. AIMS AND METHODS In this study, the main aim was to investigate proteins that may be related to the pathophysiological mechanism of TBI and also be pharmacological targets of DHT in order to explore a possible therapy with this androgen using network pharmacology. RESULTS AND CONCLUSIONS We identified 2.700 proteins related to TBI and 1.567 that are potentially molecular targets of DHT. Functional enrichment analysis showed that steroid (p-value: 2.1-22), lipid metabolism (p-value: 2.8-21) and apoptotic processes (p-value: 5.2-21) are mainly altered in TBI. Furthermore, being mitochondrion an organelle involved on these molecular processes we next identified that out of 32 mitochondrial-related proteins 3-hydroxy-3-methyl-glutaryl-coenzyme A reductase (HMGCR), peroxisome proliferator activated receptor gamma (PPGARG) and prohibitin are those found highly regulated in the network and potential targets of DHT in TBI. In conclusion, the identification of these cellular nodes may prove to be essential as targets of DHT for therapy against post-TBI inflammation.
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Affiliation(s)
- Andrew J McGovern
- Department of Biological Sciences, University of Limerick, Limerick, Ireland
| | - Janneth González
- Departamento de Nutrición y Bioquímica, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - David Ramírez
- Departamento de Farmacología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - George E Barreto
- Department of Biological Sciences, University of Limerick, Limerick, Ireland.
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The Yun/Prohibitin complex regulates adult Drosophila intestinal stem cell proliferation through the transcription factor E2F1. Proc Natl Acad Sci U S A 2022; 119:2111711119. [PMID: 35115400 PMCID: PMC8832997 DOI: 10.1073/pnas.2111711119] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/27/2021] [Indexed: 01/02/2023] Open
Abstract
Stem cells maintain tissue homeostasis. We identified a factor, Yun, required for proliferation of normal and transformed intestinal stem cells in adult Drosophila. Yun acts as a scaffold to stabilize the Prohibitin (PHB) complex previously implicated in various cellular and developmental processes and diseases. The Yun/PHB complex acts downstream of EGFR/MAPK signaling and affects the levels of E2F1 to regulate intestinal stem cell proliferation. The role of the PHB complex in cell proliferation is evolutionarily conserved. Our results provide insight into the underlying mechanisms of how stem cell proliferation is properly controlled during tissue homeostasis and tumorigenesis. Stem cells constantly divide and differentiate to maintain adult tissue homeostasis, and uncontrolled stem cell proliferation leads to severe diseases such as cancer. How stem cell proliferation is precisely controlled remains poorly understood. Here, from an RNA interference (RNAi) screen in adult Drosophila intestinal stem cells (ISCs), we identify a factor, Yun, required for proliferation of normal and transformed ISCs. Yun is mainly expressed in progenitors; our genetic and biochemical evidence suggest that it acts as a scaffold to stabilize the Prohibitin (PHB) complex previously implicated in various cellular and developmental processes and diseases. We demonstrate that the Yun/PHB complex is regulated by and acts downstream of EGFR/MAPK signaling. Importantly, the Yun/PHB complex interacts with and positively affects the levels of the transcription factor E2F1 to regulate ISC proliferation. In addition, we find that the role of the PHB complex in cell proliferation is evolutionarily conserved. Thus, our study uncovers a Yun/PHB-E2F1 regulatory axis in stem cell proliferation.
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Wang X, Jin S, Chang X, Li G, Zhang L, Jin S. Two interaction proteins between AtPHB6 and AtSOT12 regulate plant salt resistance through ROS signaling. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 169:70-80. [PMID: 34773804 DOI: 10.1016/j.plaphy.2021.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 10/12/2021] [Accepted: 11/02/2021] [Indexed: 06/13/2023]
Abstract
In the past, the PHB gene function was mainly focused on anti-cell proliferation and antitumor effects. But the molecular mechanism of the PHB gene regarding saline and oxidative stresses is unclear. To study the role of AtPHB6 in salt and oxidative stress, AtPHB6 was cloned from A. thaliana. Bioinformatics analysis showed that AtPHB6 was closely related to AtPHB1 and AtPHB2, which are both type II PHB. RT-qPCR results indicated that the AtPHB6 in the leaves and roots of A. thaliana was obviously induced under different stress treatments. AtPHB6-overexpressing plants were larger and more lush than wild-type and mutant plants when placed under stress treatments during seed germination. The root length and fresh weight of AtPHB6 transgenic plants showed the best resistance compared to wild-type plants under different treatments, in contrast, the AtPHB6 mutants had the worst resistance during the seedling stage. AtSOT12 was an interacting protein of AtPHB6, which screened by yeast two-hybrid system. The interaction between the two proteins were further confirmed using in vitro pull-down experiments and in vivo BiFC experiments. Subcellular localization showed both AtPHB6 and AtSOT12 protein expressed in the nucleus and cytoplasm. The H2O2 content in both the transgenic AtPHB6 and AtSOT12 plants were lower than that in the wild type under stresses. Thus, AtPHB6 increased plant resistance to salt stress and interacted with the AtSOT12 protein.
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Affiliation(s)
- Xiaolu Wang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, 150040, China
| | - Shengxuan Jin
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, 150040, China; College of Forestry, Northeast Forestry University, Harbin, 150040, China
| | - Xu Chang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, 150040, China
| | - Guanrong Li
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, 150040, China
| | - Ling Zhang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, 150040, China
| | - Shumei Jin
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, 150040, China.
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Baburina Y, Krestinin R, Odinokova I, Fadeeva I, Sotnikova L, Krestinina O. The Identification of Prohibitin in the Rat Heart Mitochondria in Heart Failure. Biomedicines 2021; 9:biomedicines9121793. [PMID: 34944609 PMCID: PMC8699106 DOI: 10.3390/biomedicines9121793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 11/26/2021] [Accepted: 11/26/2021] [Indexed: 11/26/2022] Open
Abstract
Mitochondria are considered the main organelles in the cell. They play an important role in both normal and abnormal heart function. There is a supramolecular organization between the complexes of the respiratory chain (supercomplexes (SCs)), which are involved in mitochondrial respiration. Prohibitins (PHBs) participate in the regulation of oxidative phosphorylation (OXPHOS) activity and interact with some subunits of the OXPHOS complexes. In this study, we identified a protein whose level was decreased in the mitochondria of the heart in rats with heart failure. This protein was PHB. Isoproterenol (ISO) has been used as a compound to induce heart failure in rats. We observed that astaxanthin (AX) increased the content of PHB in rat heart mitochondria isolated from ISO-injected rats. Since it is known that PHB forms complexes with some mitochondrial proteins and proteins that are part of the complexes of the respiratory chain, the change in the levels of these proteins was investigated under our experimental conditions. We hypothesized that PHB may be a target for the protective action of AX.
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Sato A, Rahman NIA, Shimizu A, Ogita H. Cell-to-cell contact-mediated regulation of tumor behavior in the tumor microenvironment. Cancer Sci 2021; 112:4005-4012. [PMID: 34420253 PMCID: PMC8486192 DOI: 10.1111/cas.15114] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 08/15/2021] [Accepted: 08/17/2021] [Indexed: 02/06/2023] Open
Abstract
Tumor growth and progression are complex processes mediated by mutual interactions between cancer cells and their surrounding stroma that include diverse cell types and acellular components, which form the tumor microenvironment. In this environment, direct intercellular communications play important roles in the regulation of the biological behaviors of tumors. However, the underlying molecular mechanisms are insufficiently defined. We used an in vitro coculture system to identify genes that were specifically expressed at higher levels in cancer cells associated with stromal cells. Major examples included epithelial membrane protein 1 (EMP1) and stomatin, which positively and negatively regulate tumor progression, respectively. EMP1 promotes tumor cell migration and metastasis via activation of the small GTPase Rac1, while stomatin strongly suppresses cell proliferation and induces apoptosis of cancer cells via inhibition of Akt signaling. Here we highlight important aspects of EMP1, stomatin, and their family members in cancer biology. Furthermore, we consider the molecules that participate in intercellular communications and signaling transduction between cancer cells and stromal cells, which may affect the phenotypes of cancer cells in the tumor microenvironment.
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Affiliation(s)
- Akira Sato
- Division of Molecular Medical BiochemistryDepartment of Biochemistry and Molecular BiologyShiga University of Medical ScienceOtsuJapan
| | - Nor Idayu A. Rahman
- Division of Molecular Medical BiochemistryDepartment of Biochemistry and Molecular BiologyShiga University of Medical ScienceOtsuJapan
| | - Akio Shimizu
- Division of Molecular Medical BiochemistryDepartment of Biochemistry and Molecular BiologyShiga University of Medical ScienceOtsuJapan
| | - Hisakazu Ogita
- Division of Molecular Medical BiochemistryDepartment of Biochemistry and Molecular BiologyShiga University of Medical ScienceOtsuJapan
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Rahman NIA, Sato A, Tsevelnorov K, Shimizu A, Komeno M, Ahmat Amin MKB, Molla MR, Soh JEC, Nguyen LKC, Wada A, Kawauchi A, Ogita H. Stomatin-Mediated Inhibition of the Akt Signaling Axis Suppresses Tumor Growth. Cancer Res 2021; 81:2318-2331. [PMID: 33757977 DOI: 10.1158/0008-5472.can-20-2331] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 02/16/2021] [Accepted: 03/11/2021] [Indexed: 11/16/2022]
Abstract
The growth and progression of cancers are crucially regulated by the tumor microenvironment where tumor cells and stromal cells are mutually associated. In this study, we found that stomatin expression was markedly upregulated by the interaction between prostate cancer cells and stromal cells. Stomatin suppressed cancer cell proliferation and enhanced apoptosis in vitro and inhibited xenograft tumor growth in vivo. Stomatin inhibited Akt activation, which is mediated by phosphoinositide-dependent protein kinase 1 (PDPK1). PDPK1 protein stability was maintained by its binding to HSP90. Stomatin interacted with PDPK1 and interfered with the PDPK1-HSP90 complex formation, resulting in decreased PDPK1 expression. Knockdown of stomatin in cancer cells elevated Akt activation and promoted cell increase by promoting the interaction between PDPK1 and HSP90. Clinically, stomatin expression levels were significantly decreased in human prostate cancer samples with high Gleason scores, and lower expression of stomatin was associated with higher recurrence of prostate cancer after the operation. Collectively, these findings demonstrate the tumor-suppressive effect of stromal-induced stomatin on cancer cells. SIGNIFICANCE: These findings reveal that interactions with stromal cells induce expression of stomatin in prostate cancer cells, which suppresses tumor growth via attenuation of the Akt signaling axis.
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Affiliation(s)
- Nor Idayu A Rahman
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Japan
| | - Akira Sato
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Japan.
| | - Khurelbaatar Tsevelnorov
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Japan
| | - Akio Shimizu
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Japan
| | - Masahiro Komeno
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Japan
| | - Mohammad Khusni Bin Ahmat Amin
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Japan
| | - Md Rasel Molla
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Japan
| | - Joanne Ern Chi Soh
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Japan
| | - Le Kim Chi Nguyen
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Japan
| | - Akinori Wada
- Department of Urology, Shiga University of Medical Science, Otsu, Japan
| | - Akihiro Kawauchi
- Department of Urology, Shiga University of Medical Science, Otsu, Japan
| | - Hisakazu Ogita
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Japan.
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11
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Justo Arevalo S, Zapata Sifuentes D, Huallpa CJ, Landa Bianchi G, Castillo Chávez A, Garavito-Salini Casas R, Uceda-Campos G, Pineda Chavarria R. Global Geographic and Temporal Analysis of SARS-CoV-2 Haplotypes Normalized by COVID-19 Cases During the Pandemic. Front Microbiol 2021; 12:612432. [PMID: 33746914 PMCID: PMC7971176 DOI: 10.3389/fmicb.2021.612432] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 01/25/2021] [Indexed: 12/18/2022] Open
Abstract
Since the identification of SARS-CoV-2, a large number of genomes have been sequenced with unprecedented speed around the world. This marks a unique opportunity to analyze virus spreading and evolution in a worldwide context. Currently, there is not a useful haplotype description to help to track important and globally scattered mutations. Also, differences in the number of sequenced genomes between countries and/or months make it difficult to identify the emergence of haplotypes in regions where few genomes are sequenced but a large number of cases are reported. We propose an approach based on the normalization by COVID-19 cases of relative frequencies of mutations using all the available data to identify major haplotypes. Furthermore, we can use a similar normalization approach to tracking the temporal and geographic distribution of haplotypes in the world. Using 171,461 genomes, we identify five major haplotypes or operational taxonomic units (OTUs) based on nine high-frequency mutations. OTU_3 characterized by mutations R203K and G204R is currently the most frequent haplotype circulating in four of the six continents analyzed (South America, North America, Europe, Asia, Africa, and Oceania). On the other hand, during almost all months analyzed, OTU_5 characterized by the mutation T85I in nsp2 is the most frequent in North America. Recently (since September), OTU_2 has been established as the most frequent in Europe. OTU_1, the ancestor haplotype, is near to extinction showed by its low number of isolations since May. Also, we analyzed whether age, gender, or patient status is more related to a specific OTU. We did not find OTU's preference for any age group, gender, or patient status. Finally, we discuss structural and functional hypotheses in the most frequently identified mutations, none of those mutations show a clear effect on the transmissibility or pathogenicity.
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Affiliation(s)
- Santiago Justo Arevalo
- Facultad de Ciencias Biológicas, Universidad Ricardo Palma, Lima, Peru
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | | | - César J. Huallpa
- Facultad de Ciencias, Universidad Nacional Agraria La Molina, Lima, Peru
| | | | | | | | - Guillermo Uceda-Campos
- Facultad de Ciencias Biológicas, Universidad Nacional Pedro Ruiz Gallo, Lambayeque, Peru
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12
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Mariano G, Farthing RJ, Lale-Farjat SLM, Bergeron JRC. Structural Characterization of SARS-CoV-2: Where We Are, and Where We Need to Be. Front Mol Biosci 2020; 7:605236. [PMID: 33392262 PMCID: PMC7773825 DOI: 10.3389/fmolb.2020.605236] [Citation(s) in RCA: 127] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 10/22/2020] [Indexed: 01/18/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has rapidly spread in humans in almost every country, causing the disease COVID-19. Since the start of the COVID-19 pandemic, research efforts have been strongly directed towards obtaining a full understanding of the biology of the viral infection, in order to develop a vaccine and therapeutic approaches. In particular, structural studies have allowed to comprehend the molecular basis underlying the role of many of the SARS-CoV-2 proteins, and to make rapid progress towards treatment and preventive therapeutics. Despite the great advances that have been provided by these studies, many knowledge gaps on the biology and molecular basis of SARS-CoV-2 infection still remain. Filling these gaps will be the key to tackle this pandemic, through development of effective treatments and specific vaccination strategies.
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Affiliation(s)
- Giuseppina Mariano
- Microbes in Health and Disease Theme, Newcastle University Biosciences Institute, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Rebecca J. Farthing
- Randall Centre for Cell and Molecular Biophysics, King’s College London, London, United Kingdom
| | | | - Julien R. C. Bergeron
- Randall Centre for Cell and Molecular Biophysics, King’s College London, London, United Kingdom
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13
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Maan M, Agrawal NJ, Padmanabhan J, Leitzinger CC, Rivera-Rivera Y, Saavedra HI, Chellappan SP. Tank Binding Kinase 1 modulates spindle assembly checkpoint components to regulate mitosis in breast and lung cancer cells. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2020; 1868:118929. [PMID: 33310066 DOI: 10.1016/j.bbamcr.2020.118929] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 11/17/2020] [Accepted: 12/07/2020] [Indexed: 11/25/2022]
Abstract
Error-free progression through mitosis is critical for proper cell division and accurate distribution of the genetic material. The anaphase-promoting complex/cyclosome (APC/C) ubiquitin ligase regulates the progression from metaphase to anaphase and its activation is controlled by the cofactors Cdc20 and Cdh1. Additionally, genome stability is maintained by the spindle assembly checkpoint (SAC), which monitors proper attachment of chromosomes to spindle microtubules prior to cell division. We had shown a role for Tank Binding Kinase 1 (TBK1) in microtubule dynamics and mitosis and here we describe a novel role of TBK1 in regulating SAC in breast and lung cancer cells. TBK1 interacts with and phosphorylates Cdc20 and Cdh1 and depletion of TBK1 elevates SAC components. TBK1 inhibition increases the association of Cdc20 with APC/C and BubR1 indicating inactivation of APC/C; similarly, interaction of Cdh1 with APC/C is also enhanced. TBK1 and TTK inhibition reduces cell viability and enhances centrosome amplification and micronucleation. These results indicate that alterations in TBK1 will impede mitotic progression and combining TBK1 inhibitors with other regulators of mitosis might be effective in eliminating cancer cells.
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Affiliation(s)
- Meenu Maan
- Department of Tumor Biology, H, Lee Moffitt Cancer Center and Research Institute, 12902 USF Magnolia Drive, Tampa, FL 33612, United States of America
| | - Neha Jaiswal Agrawal
- Department of Tumor Biology, H, Lee Moffitt Cancer Center and Research Institute, 12902 USF Magnolia Drive, Tampa, FL 33612, United States of America
| | - Jaya Padmanabhan
- Department of Tumor Biology, H, Lee Moffitt Cancer Center and Research Institute, 12902 USF Magnolia Drive, Tampa, FL 33612, United States of America
| | - Christelle Colin Leitzinger
- Department of Tumor Biology, H, Lee Moffitt Cancer Center and Research Institute, 12902 USF Magnolia Drive, Tampa, FL 33612, United States of America
| | - Yainyrette Rivera-Rivera
- Department of Basic Sciences, Division of Pharmacology and Cancer Biology, Ponce Health Sciences University/Ponce Research Institute, Ponce 00716-2348, Puerto Rico
| | - Harold I Saavedra
- Department of Basic Sciences, Division of Pharmacology and Cancer Biology, Ponce Health Sciences University/Ponce Research Institute, Ponce 00716-2348, Puerto Rico
| | - Srikumar P Chellappan
- Department of Tumor Biology, H, Lee Moffitt Cancer Center and Research Institute, 12902 USF Magnolia Drive, Tampa, FL 33612, United States of America.
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14
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Kumar N, Gulati HK, Sharma A, Heer S, Jassal AK, Arora L, Kaur S, Singh A, Bhagat K, Kaur A, Singh H, Singh JV, Bedi PMS. Most recent strategies targeting estrogen receptor alpha for the treatment of breast cancer. Mol Divers 2020; 25:603-624. [PMID: 32886304 DOI: 10.1007/s11030-020-10133-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 08/13/2020] [Indexed: 11/28/2022]
Abstract
Breast cancer is the most prominent, frequently diagnosed and leading cause of death among women. Estrogen is an agonist of estrogen receptor alpha (ER-α), expressed in mammary glands and is responsible for initiating many signalling pathways that lead to differentiation and development of breast tissue. Any mutations in these signalling pathways result in irregular growth of mammary tissue, leading to the development of tumour or cancer. All these observations attract the attention of researchers to antagonize ER-α receptor either by developing selective estrogen receptor modulators or by selective estrogen receptor degraders. Therefore, this article provides a brief overview of various factors that are responsible for provoking breast cancer in women and design strategies recently used by the various research groups across the world for antagonizing or demodulating ER-α.
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Affiliation(s)
- Nitish Kumar
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, 143005, India.,Drug and Pollution Testing Laboratory, Guru Nanak Dev University, Amritsar, Punjab, 143005, India
| | - Harmandeep Kaur Gulati
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, 143005, India
| | - Aakriti Sharma
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, 143005, India
| | - Shilpa Heer
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, 143005, India
| | - Anupmjot Kaur Jassal
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, 143005, India
| | - Lovenish Arora
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, 143005, India
| | - Simranpreet Kaur
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, 143005, India
| | - Atamjit Singh
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, 143005, India
| | - Kavita Bhagat
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, 143005, India
| | - Arshmeet Kaur
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, 143005, India
| | - Harbinder Singh
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, 143005, India.
| | - Jatinder Vir Singh
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, 143005, India.
| | - Preet Mohinder Singh Bedi
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, 143005, India. .,Drug and Pollution Testing Laboratory, Guru Nanak Dev University, Amritsar, Punjab, 143005, India.
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15
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Wang D, Tabti R, Elderwish S, Abou-Hamdan H, Djehal A, Yu P, Yurugi H, Rajalingam K, Nebigil CG, Désaubry L. Prohibitin ligands: a growing armamentarium to tackle cancers, osteoporosis, inflammatory, cardiac and neurological diseases. Cell Mol Life Sci 2020; 77:3525-3546. [PMID: 32062751 PMCID: PMC11104971 DOI: 10.1007/s00018-020-03475-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 01/28/2020] [Accepted: 01/30/2020] [Indexed: 02/08/2023]
Abstract
Over the last three decades, the scaffold proteins prohibitins-1 and -2 (PHB1/2) have emerged as key signaling proteins regulating a myriad of signaling pathways in health and diseases. Small molecules targeting PHBs display promising effects against cancers, osteoporosis, inflammatory, cardiac and neurodegenerative diseases. This review provides an updated overview of the various classes of PHB ligands, with an emphasis on their mechanism of action and therapeutic potential. We also describe how these ligands have been used to explore PHB signaling in different physiological and pathological settings.
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Affiliation(s)
- Dong Wang
- Sino-French Joint Lab of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Redouane Tabti
- Laboratory of Cardio-Oncology and Medicinal Chemistry (FRE 2033), CNRS, Institut Le Bel, 4 rue Blaise Pascal, CS 90032, 67081, Strasbourg, France
| | - Sabria Elderwish
- Laboratory of Cardio-Oncology and Medicinal Chemistry (FRE 2033), CNRS, Institut Le Bel, 4 rue Blaise Pascal, CS 90032, 67081, Strasbourg, France
| | - Hussein Abou-Hamdan
- Laboratory of Cardio-Oncology and Medicinal Chemistry (FRE 2033), CNRS, Institut Le Bel, 4 rue Blaise Pascal, CS 90032, 67081, Strasbourg, France
| | - Amel Djehal
- Laboratory of Cardio-Oncology and Medicinal Chemistry (FRE 2033), CNRS, Institut Le Bel, 4 rue Blaise Pascal, CS 90032, 67081, Strasbourg, France
- Superior National School Biotechnology Taoufik Khaznadar, Ville universitaire Ali Mendjeli, BP E66 25100, Constantine, Algeria
| | - Peng Yu
- Sino-French Joint Lab of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Hajime Yurugi
- Cell Biology Unit, University Medical Center Mainz, JGU-Mainz, Mainz, Germany
| | | | - Canan G Nebigil
- Laboratory of Cardio-Oncology and Medicinal Chemistry (FRE 2033), CNRS, Institut Le Bel, 4 rue Blaise Pascal, CS 90032, 67081, Strasbourg, France
| | - Laurent Désaubry
- Sino-French Joint Lab of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China.
- Laboratory of Cardio-Oncology and Medicinal Chemistry (FRE 2033), CNRS, Institut Le Bel, 4 rue Blaise Pascal, CS 90032, 67081, Strasbourg, France.
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16
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Cell stemness is maintained upon concurrent expression of RB and the mitochondrial ribosomal protein S18-2. Proc Natl Acad Sci U S A 2020; 117:15673-15683. [PMID: 32571933 PMCID: PMC7355020 DOI: 10.1073/pnas.1922535117] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Stemness encompasses the capability of a cell for self-renewal and differentiation. The stem cell maintains a balance between proliferation, quiescence, and regeneration via interactions with the microenvironment. Previously, we showed that ectopic expression of the mitochondrial ribosomal protein S18-2 (MRPS18-2) led to immortalization of primary fibroblasts, accompanied by induction of an embryonic stem cell (ESC) phenotype. Moreover, we demonstrated interaction between S18-2 and the retinoblastoma-associated protein (RB) and hypothesized that the simultaneous expression of RB and S18-2 is essential for maintaining cell stemness. Here, we experimentally investigated the role of S18-2 in cell stemness and differentiation. Concurrent expression of RB and S18-2 resulted in immortalization of Rb1 -/- primary mouse embryonic fibroblasts and in aggressive tumor growth in severe combined immunodeficiency mice. These cells, which express both RB and S18-2 at high levels, exhibited the potential to differentiate into various lineages in vitro, including osteogenic, chondrogenic, and adipogenic lineages. Mechanistically, S18-2 formed a multimeric protein complex with prohibitin and the ring finger protein 2 (RNF2). This molecular complex increased the monoubiquitination of histone H2ALys119, a characteristic trait of ESCs, by enhanced E3-ligase activity of RNF2. Furthermore, we found enrichment of KLF4 at the S18-2 promoter region and that the S18-2 expression is positively correlated with KLF4 levels. Importantly, knockdown of S18-2 in zebrafish larvae led to embryonic lethality. Collectively, our findings suggest an important role for S18-2 in cell stemness and differentiation and potentially also in cancerogenesis.
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17
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Jo CS, Park HI, Jung HJ, Park JI, Lee JE, Myung CH, Hwang JS. A novel function of Prohibitin on melanosome transport in melanocytes. Theranostics 2020; 10:3880-3891. [PMID: 32226526 PMCID: PMC7086355 DOI: 10.7150/thno.41383] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 02/13/2020] [Indexed: 01/26/2023] Open
Abstract
Prohibitin (PHB, also known as PHB1 or BAP32), is a highly conserved 31kDa protein that expressed in many cellular compartments, such as mitochondria, nucleus, cytosol, and plasma membrane, and plays roles in regulating the transcription of genes, apoptosis, and mitochondrial biogenesis. There is a report that Prohibitin expression is required for the stimulation of pigmentation by melanogenin. However, no studies have been published on the function of PHB in melanocytes, especially in melanosome transport. Methods: Immunofluorescence was performed to confirm the localization of PHB. siRNA transfections, Co-immunoprecipitation, western blotting and proximity ligation assay were performed to find binding state between proteins and demonstrate functions of PHB on melanosome transport. Results: PHB is located in the melanosome and perinuclear aggregation of melanosome is induced when expression of PHB is reduced with no influence on melanin contents. PHB binds directly to Rab27a and Mlph but not Myosin-Va. Rab27a and Mlph bind to specific domains of PHB. Reduced expression of PHB led to the impaired binding affinity between Rab27a and Mlph. Conclusion: PHB regulates melanosome transport by linking to Rab27a and Mlph in melanocytes. Targeting and regulating PHB not only manages pigmentation in melanocytes, but also controls hyperpigmentation in melanoma
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18
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Abstract
Prohibitin 1 is an evolutionary conserved and ubiquitously expressed protein that exerts different biological functions depending on its subcellular localization. The role of prohibitin 1 in liver cancer is controversial as it can be pro- or anti-tumorigenic. However, most of the studies to date have described prohibitin 1 primarily as a tumor suppressor in the liver. Its deficiency sensitizes the liver to cholestatic liver injury, non-alcoholic fatty liver disease, inflammatory insults, and cancer. Liver-specific Phb1-knockout mice spontaneously develop hepatocellular carcinoma, Phb1 heterozygotes are more susceptible to develop cholangiocarcinoma, and the majority of human hepatocellular carcinomas and cholangiocarcinomas have reduced prohibitin 1 expression. Consistent with a tumor suppressive role in the liver, prohibitin 1 negatively regulates proliferation in hepatocytes and human hepatocellular carcinoma and cholangiocarcinoma cell lines, and multiple oncogenic signaling pathways are activated when prohibitin 1 is deficient. Although best known as a mitochondrial chaperone, prohibitin 1 can protect the liver by mitochondrial-independent mechanisms. This review summarizes what’s known about prohibitin 1’s role in liver pathology, with the focus on hepatoprotection and carcinogenesis. Impact statement This review summarizes the last decades of research on PHB1 in liver pathobiology. PHB1 is a key player for liver health as it is hepatoprotective and tumor suppressive. We highlight the importance of PHB1’s subcellular localization, post-translational modifications, and interacting proteins as major determinants of PHB1 cytoprotective function and anti-tumor activity in the liver.
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Affiliation(s)
- Lucía Barbier-Torres
- Division of Digestive and Liver Diseases, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Shelly C Lu
- Division of Digestive and Liver Diseases, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
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19
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Zhang J, Cao Z, Yang G, You L, Zhang T, Zhao Y. MicroRNA-27a (miR-27a) in Solid Tumors: A Review Based on Mechanisms and Clinical Observations. Front Oncol 2019; 9:893. [PMID: 31572683 PMCID: PMC6751266 DOI: 10.3389/fonc.2019.00893] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 08/27/2019] [Indexed: 12/11/2022] Open
Abstract
MicroRNAs (miRNAs) are a family of highly conserved, non-coding single-stranded RNAs transcribed as ~70 nucleotide precursors to an 18–22 nucleotide product (1). miRNAs can silence their homologous target genes at the post-transcriptional level, and these genes have been revealed to play an important role in tumorigenesis, invasion and metastasis (2). MicroRNA-27a (miR-27a), transcripted by miR-27a gene, has proved to implicate with many kinds of solid tumors, showing potential as a useful biomarker or drug target for clinical application. However, even though miR-27a has been reported in many cancers, the mechanism and signal pathways of miR-27 in oncogenesis, invasion, and metastasis are still obscure. Moreover, recent studies show that miR-27a pays an important role in epithelial-mesenchymal-transition, regulating tumor immune response, and chemoresistance. In this review, we summarize the current literature, demonstrate the established link between miR-27a and tumorigenesis, and focus on recently identified mechanisms. The review also aims to demonstrate the potential of miR-27a as a diagnostic and/or prognostic biomarker in solid tumors and to discuss the possibilities of targeted therapy and drug design.
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Affiliation(s)
- Jingcheng Zhang
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.,Peking Union Medical College, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Zhe Cao
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Gang Yang
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Lei You
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Taiping Zhang
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.,Clinical Immunology Center, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yupei Zhao
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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20
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Saleh A, Subramaniam G, Raychaudhuri S, Dhawan J. Cytoplasmic sequestration of the RhoA effector mDiaphanous1 by Prohibitin2 promotes muscle differentiation. Sci Rep 2019; 9:8302. [PMID: 31165762 PMCID: PMC6549159 DOI: 10.1038/s41598-019-44749-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 01/23/2019] [Indexed: 02/06/2023] Open
Abstract
Muscle differentiation is controlled by adhesion and growth factor-dependent signalling through common effectors that regulate muscle-specific transcriptional programs. Here we report that mDiaphanous1, an effector of adhesion-dependent RhoA-signalling, negatively regulates myogenesis at the level of Myogenin expression. In myotubes, over-expression of mDia1ΔN3, a RhoA-independent mutant, suppresses Myogenin promoter activity and expression. We investigated mDia1-interacting proteins that may counteract mDia1 to permit Myogenin expression and timely differentiation. Using yeast two-hybrid and mass-spectrometric analysis, we report that mDia1 has a stage-specific interactome, including Prohibitin2, MyoD, Akt2, and β-Catenin, along with a number of proteosomal and mitochondrial components. Of these interacting partners, Prohibitin2 colocalises with mDia1 in cytoplasmic punctae in myotubes. We mapped the interacting domains of mDia1 and Phb2, and used interacting (mDia1ΔN3/Phb2 FL or mDia1ΔN3/Phb2-Carboxy) and non-interacting pairs (mDia1H + P/Phb2 FL or mDia1ΔN3/Phb2-Amino) to dissect the functional consequences of this partnership on Myogenin promoter activity. Co-expression of full-length as well as mDia1-interacting domains of Prohibitin2 reverse the anti-myogenic effects of mDia1ΔN3, while non-interacting regions do not. Our results suggest that Prohibitin2 sequesters mDia1, dampens its anti-myogenic activity and fine-tunes RhoA-mDia1 signalling to promote differentiation. Overall, we report that mDia1 is multi-functional signalling effector whose anti-myogenic activity is modulated by a differentiation-dependent interactome. The data have been deposited to the ProteomeXchange with identifier PXD012257.
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Affiliation(s)
- Amena Saleh
- Institute for Stem Cell Science & Regenerative Medicine, Bangalore, Karnataka, 560065, India
- Council of Scientific & Industrial Research -Centre for Cellular & Molecular Biology, Hyderabad, Telangana, 500007, India
- Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Gunasekaran Subramaniam
- Council of Scientific & Industrial Research -Centre for Cellular & Molecular Biology, Hyderabad, Telangana, 500007, India
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, OX1 3PT, UK
| | - Swasti Raychaudhuri
- Council of Scientific & Industrial Research -Centre for Cellular & Molecular Biology, Hyderabad, Telangana, 500007, India
| | - Jyotsna Dhawan
- Institute for Stem Cell Science & Regenerative Medicine, Bangalore, Karnataka, 560065, India.
- Council of Scientific & Industrial Research -Centre for Cellular & Molecular Biology, Hyderabad, Telangana, 500007, India.
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21
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Kong X, Tian H, Yu Q, Zhang F, Wang R, Gao S, Xu W, Liu J, Shani E, Fu C, Zhou G, Zhang L, Zhang X, Ding Z. PHB3 Maintains Root Stem Cell Niche Identity through ROS-Responsive AP2/ERF Transcription Factors in Arabidopsis. Cell Rep 2019; 22:1350-1363. [PMID: 29386120 DOI: 10.1016/j.celrep.2017.12.105] [Citation(s) in RCA: 101] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 11/23/2017] [Accepted: 12/28/2017] [Indexed: 12/31/2022] Open
Abstract
The root stem cell niche, which is composed of four mitotically inactive quiescent center (QC) cells and the surrounding actively divided stem cells in Arabidopsis, is critical for growth and root development. Here, we demonstrate that the Arabidopsis prohibitin protein PHB3 is required for the maintenance of root stem cell niche identity by both inhibiting proliferative processes in the QC and stimulating cell division in the proximal meristem (PM). PHB3 coordinates cell division and differentiation in the root apical meristem by restricting the spatial expression of ethylene response factor (ERF) transcription factors 115, 114, and 109. ERF115, ERF114, and ERF109 mediate ROS signaling, in a PLT-independent manner, to control root stem cell niche maintenance and root growth through phytosulfokine (PSK) peptide hormones in Arabidopsis.
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Affiliation(s)
- Xiangpei Kong
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, College of Life Sciences, Shandong University, Jinan, 250100 Shandong, China
| | - Huiyu Tian
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, College of Life Sciences, Shandong University, Jinan, 250100 Shandong, China
| | - Qianqian Yu
- College of Life Sciences, Liaocheng University, Liaocheng, 252000 Shandong, China
| | - Feng Zhang
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, College of Life Sciences, Shandong University, Jinan, 250100 Shandong, China
| | - Rong Wang
- College of Nursing, Xi'an Siyuan University, Xi'an, 710038 Shaanxi, China
| | - Shan Gao
- College of Life Sciences, Qilu Normal University, Jinan, 250200 Shandong, China
| | - Wenhong Xu
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, College of Life Sciences, Shandong University, Jinan, 250100 Shandong, China
| | - Jiajia Liu
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, College of Life Sciences, Shandong University, Jinan, 250100 Shandong, China
| | - Eilon Shani
- Department of Molecular Biology and Ecology of Plants, Tel Aviv University, Tel Aviv 69978, Israel
| | - Chunxiang Fu
- Shandong Provincial Key Laboratory of Energy Genetics, Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 Shandong, China
| | - Gongke Zhou
- Shandong Provincial Key Laboratory of Energy Genetics, Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 Shandong, China
| | - Liangran Zhang
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, College of Life Sciences, Shandong University, Jinan, 250100 Shandong, China
| | - Xiansheng Zhang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai' an, 271018 Shandong, China
| | - Zhaojun Ding
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, College of Life Sciences, Shandong University, Jinan, 250100 Shandong, China.
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22
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Alavi MV. Targeted OMA1 therapies for cancer. Int J Cancer 2019; 145:2330-2341. [PMID: 30714136 DOI: 10.1002/ijc.32177] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 01/20/2019] [Accepted: 01/23/2019] [Indexed: 12/12/2022]
Abstract
The mitochondrial inner membrane proteins OMA1 and OPA1 belong to the BAX/BAK1-dependent apoptotic signaling pathway, which can be regulated by tumor protein p53 and the prohibitins PHB and PHB2 in the context of neoplastic disease. For the most part these proteins have been studied separate from each other. Here, I argue that the OMA1 mechanism of action represents the missing link between p53 and cytochrome c release. The mitochondrial fusion protein OPA1 is cleaved by OMA1 in a stress-dependent manner generating S-OPA1. Excessive S-OPA1 can facilitate outer membrane permeabilization upon BAX/BAK1 activation through its membrane shaping properties. p53 helps outer membrane permeabilization in a 2-step process. First, cytosolic p53 activates BAX/BAK1 at the mitochondrial surface. Then, in a second step, p53 binds to prohibitin thereby releasing the restraint on OMA1. This activates OMA1, which cleaves OPA1 and promotes cytochrome c release. Clearly, OMA1 and OPA1 are not root causes for cancer. Yet many cancer cells rely on this pathway for survival, which can explain why loss of p53 function promotes tumor growth and confers resistance to chemotherapies.
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23
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Ma W, Xu Z, Wang Y, Li W, Wei Z, Chen T, Mou T, Cheng M, Luo J, Luo T, Chen Y, Yu J, Zhou W, Li G. A Positive Feedback Loop of SLP2 Activates MAPK Signaling Pathway to Promote Gastric Cancer Progression. Am J Cancer Res 2018; 8:5744-5757. [PMID: 30555578 PMCID: PMC6276297 DOI: 10.7150/thno.28898] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 10/16/2018] [Indexed: 12/23/2022] Open
Abstract
Rationale: This study is to validate the clinicopathologic significance and potential prognostic value of SLP2 in gastric cancer (GC), to investigate the biological function and regulation mechanism of SLP2, and to explore potential therapeutic strategies for GC. Methods: The expression of SLP2 in GC tissues from two cohorts was examined by IHC. The biological function and regulation mechanism of SLP2 and PHB was validated via loss-of-function or gain-of-function experiments. In vitro proliferation detection was used to evaluate the therapeutic effects of Sorafenib. Results: We validated that SLP2 was significantly elevated in GC tissues and its elevation was associated with poor prognosis of patients. Loss of SLP2 drastically suppressed the proliferation of GC cells and inhibited the tumor growth, while SLP2 overexpression promoted the progression of GC. Mechanistically, SLP2 competed against E3 ubiquitin ligase SKP2 to bind with PHB and stabilized its expression. Loss of SLP2 significantly suppressed phosphorylation of Raf1, MEK1/2, ERK1/2 and ELK1. Furthermore, phosphorylated ELK1 could in turn activate transcription of SLP2. Finally, we demonstrated that a Raf1 inhibitor, Sorafenib, was sufficient to inhibit the proliferation of GC cells. Conclusion: Our findings demonstrated a positive feedback loop of SLP2 which leads to acceleration of tumor progression and poor survival of GC patients. This finding also provided evidence for the reason of SLP2 elevation. Moreover, we found that sorafenib might be a potential therapeutic drug for GC and disrupting the interaction between SLP2 and PHB might also serve as a potential therapeutic target in GC.
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24
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Mavila N, Tang Y, Berlind J, Ramani K, Wang J, Mato JM, Lu SC. Prohibitin 1 Acts As a Negative Regulator of Wingless/Integrated-Beta-Catenin Signaling in Murine Liver and Human Liver Cancer Cells. Hepatol Commun 2018; 2:1583-1600. [PMID: 30556043 PMCID: PMC6287485 DOI: 10.1002/hep4.1257] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 08/20/2018] [Indexed: 12/12/2022] Open
Abstract
Prohibitin1 (PHB1) is a mitochondrial chaperone with diverse functions that include cell proliferation, apoptosis, and mitochondrial homoeostasis. Liver‐specific Phb1 knockout (KO) mice develop spontaneous injury and hepatocellular carcinoma (HCC). Our previous work demonstrated that PHB1 negatively regulates the H19‐insulin‐like growth factor 2 (IGF2)‐H19‐IGF2 axis signaling pathway and E‐box activity in hepatocytes and HCC cells. Phb1 KO livers exhibited increased expression of multiple wingless/integrated (WNT) target genes compared to control littermates. Therefore, we hypothesized that PHB1 is a negative regulator of WNT‐beta‐catenin signaling in the liver. Analysis of livers from Phb1 KO mice demonstrated an activation of the WNT‐beta‐catenin pathway as determined by phosphorylation of glycogen synthase kinase 3 (GSK3)betaserine [Ser]9 and protein kinase B (AKT)Ser473. Phb1 KO livers showed increased messenger RNA (mRNA) levels of multiple WNT ligands, with Wnt7a (79‐fold), Wnt10a (12‐fold), and Wnt16 (48‐fold) being most highly overexpressed compared to control littermates. Subcellular fractionation of liver cells from Phb1 KO mice indicated that hepatocytes are the main source of WNT ligands. Immunostaining and cellular colocalization analysis of Phb1 KO livers demonstrated expression of WNT7a, WNT10a, and WNT16 in hepatocytes. Chromatin immunoprecipitation revealed increased binding of transcription factor E2F1 (E2F1) to the Wnt10a promoter in Phb1 KO livers and WNT9A in HepG2 cells. PHB1 silencing in HepG2 cells activated WNT signaling, whereas its overexpression caused inactivation of this pathway. PHB1 silencing in HepG2 cells induced the expression of multiple WNT ligands of which WNT9A induction was partly regulated through E2F1. Conclusion: PHB1 acts as a negative regulator of WNT signaling, and its down‐regulation causes the induction of multiple WNT ligands and downstream activation of canonical WNT‐beta‐catenin signaling in murine liver and human HCC cells, in part through E2F1.
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Affiliation(s)
- Nirmala Mavila
- Division of Digestive and Liver Diseases, Department of Medicine Cedars Sinai Medical Center Los Angeles CA.,Division of Applied Cell Biology and Physiology, Department of Biomedical Sciences Cedars Sinai Medical Center Los Angeles CA
| | - Yuanyuan Tang
- Division of Digestive and Liver Diseases, Department of Medicine Cedars Sinai Medical Center Los Angeles CA.,Department of Oncology The Second Xiangya Hospital, Central South University Changsha China
| | - Joshua Berlind
- Division of Digestive and Liver Diseases, Department of Medicine Cedars Sinai Medical Center Los Angeles CA
| | - Komal Ramani
- Division of Digestive and Liver Diseases, Department of Medicine Cedars Sinai Medical Center Los Angeles CA.,Division of Applied Cell Biology and Physiology, Department of Biomedical Sciences Cedars Sinai Medical Center Los Angeles CA
| | - Jiaohong Wang
- Division of Digestive and Liver Diseases, Department of Medicine Cedars Sinai Medical Center Los Angeles CA
| | - José M Mato
- CIC bioGUNE, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas Technology Park of Bizkaia Derio Spain
| | - Shelly C Lu
- Division of Digestive and Liver Diseases, Department of Medicine Cedars Sinai Medical Center Los Angeles CA
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25
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Djehal A, Krayem M, Najem A, Hammoud H, Cresteil T, Nebigil CG, Wang D, Yu P, Bentouhami E, Ghanem GE, Désaubry L. Targeting prohibitin with small molecules to promote melanogenesis and apoptosis in melanoma cells. Eur J Med Chem 2018; 155:880-888. [DOI: 10.1016/j.ejmech.2018.06.052] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 06/18/2018] [Accepted: 06/22/2018] [Indexed: 12/22/2022]
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26
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Cai X, Yu W, Yu W, Zhang Q, Feng W, Liu M, Sun M, Xiang J, Zhang Y, Fu X. Tissue-based quantitative proteomics to screen and identify the potential biomarkers for early recurrence/metastasis of esophageal squamous cell carcinoma. Cancer Med 2018; 7:2504-2517. [PMID: 29683265 PMCID: PMC6010861 DOI: 10.1002/cam4.1463] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 02/07/2018] [Accepted: 02/28/2018] [Indexed: 12/11/2022] Open
Abstract
Esophageal squamous cell carcinoma (ESCC) is the eighth cause of cancer-related deaths worldwide. To screen potential biomarkers associated with early recurrence/metastasis (R/M) of ESCC patients after radical resection, ESCC patients were analyzed by a comparative proteomics analysis using iTRAQ with RPLC-MS to screen differential proteins among R/M groups and adjacent normal tissues. The proteins were identified by qRT-PCR, Western blotting, and tissue microarray. The protein and mRNA expression difference of PHB2 between tumor tissues of ESCC patients and adjacent normal tissues, ESCC patients with and without metastasis, four ESCC cell lines and normal esophageal epithelial cells were inspected using immunohistochemical staining, qRT-PCR, and Western blotting. The EC109 and TE1 cells were used to establish PHB2 knockdown cell models, and their cell proliferation and invasion ability were determined by cell counting method, Transwell® assay. Thirteen proteins were selected by cutoff value of 0.67 fold for underexpression and 1.5-fold for overexpression. Seven proteins were confirmed to be associated with R/M among the 13 proteins. The potential biomarker PHB2 for early recurrence/metastasis of ESCC was identified. PHB2 expression was related to the OS of ESCC patients (P = 0.032) and had high levels in the tumor tissues and human cell lines of ESCC (P = 0.0002). Also, the high PHB2 expression promoted the metastasis of ESCC (P = 0.0075), suggesting high PHB2 expression was a potential prognostic biomarker. Experiments showed that PHB2 could significantly promote the proliferation and cell invasion ability of human ESCC cell lines and the knockdown of PHB2 suppressed the phosphorylation level of AKT, as well as the expression of MMP9 and RAC1. PHB2 could predict the early metastasis of ESCC patients.
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Affiliation(s)
- Xu‐Wei Cai
- Department of Radiation OncologyShanghai Chest HospitalShanghai Jiao Tong UniversityShanghaiChina
- Department of Radiation OncologyFudan University Shanghai Cancer CenterShanghaiChina
| | - Wei‐Wei Yu
- Department of Radiation OncologyFudan University Shanghai Cancer CenterShanghaiChina
- Department of Radiation OncologyShanghai Jiao Tong University Affiliated Sixth People's HospitalShanghaiChina
| | - Wen Yu
- Department of Radiation OncologyShanghai Chest HospitalShanghai Jiao Tong UniversityShanghaiChina
- Department of Radiation OncologyFudan University Shanghai Cancer CenterShanghaiChina
| | - Qin Zhang
- Department of Radiation OncologyShanghai Chest HospitalShanghai Jiao Tong UniversityShanghaiChina
- Department of Radiation OncologyFudan University Shanghai Cancer CenterShanghaiChina
| | - Wen Feng
- Department of Radiation OncologyShanghai Chest HospitalShanghai Jiao Tong UniversityShanghaiChina
- Department of Radiation OncologyFudan University Shanghai Cancer CenterShanghaiChina
| | - Mi‐Na Liu
- Department of Radiation OncologyShanghai Chest HospitalShanghai Jiao Tong UniversityShanghaiChina
- Department of Radiation OncologyFudan University Shanghai Cancer CenterShanghaiChina
| | - Meng‐Hong Sun
- Department of PathologyFudan University Shanghai Cancer CenterShanghaiChina
| | - Jia‐Qing Xiang
- Department of Thoracic SurgeryFudan University Shanghai Cancer CenterShanghaiChina
| | - Ya‐Wei Zhang
- Department of Thoracic SurgeryFudan University Shanghai Cancer CenterShanghaiChina
| | - Xiao‐Long Fu
- Department of Radiation OncologyShanghai Chest HospitalShanghai Jiao Tong UniversityShanghaiChina
- Department of Radiation OncologyFudan University Shanghai Cancer CenterShanghaiChina
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27
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Significance of prohibitin domain family in tumorigenesis and its implication in cancer diagnosis and treatment. Cell Death Dis 2018; 9:580. [PMID: 29784973 PMCID: PMC5962566 DOI: 10.1038/s41419-018-0661-3] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 04/27/2018] [Accepted: 05/03/2018] [Indexed: 12/11/2022]
Abstract
Prohibitin (PHB) was originally isolated and characterized as an anti-proliferative gene in rat liver. The evolutionarily conserved PHB gene encodes two human protein isoforms with molecular weights of ~33 kDa, PHB1 and PHB2. PHB1 and PHB2 belong to the prohibitin domain family, and both are widely distributed in different cellular compartments such as the mitochondria, nucleus, and cell membrane. Most studies have confirmed differential expression of PHB1 and PHB2 in cancers compared to corresponding normal tissues. Furthermore, studies verified that PHB1 and PHB2 are involved in the biological processes of tumorigenesis, including cancer cell proliferation, apoptosis, and metastasis. Two small molecule inhibitors, Rocaglamide (RocA) and fluorizoline, derived from medicinal plants, were demonstrated to interact directly with PHB1 and thus inhibit the interaction of PHB with Raf-1, impeding Raf-1/ERK signaling cascades and significantly suppressing cancer cell metastasis. In addition, a short peptide ERAP and a natural product xanthohumol were shown to target PHB2 directly and prohibit cancer progression in estrogen-dependent cancers. As more efficient biomarkers and targets are urgently needed for cancer diagnosis and treatment, here we summarize the functional role of prohibitin domain family proteins, focusing on PHB1 and PHB2 in tumorigenesis and cancer development, with the expectation that targeting the prohibitin domain family will offer more clues for cancer therapy.
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28
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Cirilo PDR, de Sousa Andrade LN, Corrêa BRS, Qiao M, Furuya TK, Chammas R, Penalva LOF. MicroRNA-195 acts as an anti-proliferative miRNA in human melanoma cells by targeting Prohibitin 1. BMC Cancer 2017; 17:750. [PMID: 29126391 PMCID: PMC5681823 DOI: 10.1186/s12885-017-3721-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 10/30/2017] [Indexed: 12/31/2022] Open
Abstract
Background Melanoma is the most lethal type of skin cancer. Since chemoresistance is a significant barrier, identification of regulators affecting chemosensitivity is necessary in order to create new forms of intervention. Prohibitin 1 (PHB1) can act as anti-apoptotic or tumor suppressor molecule, depending on its subcellular localization. Our recent data shown that accumulation of PHB1 protects melanoma cells from chemotherapy-induced cell death. Lacking of post-transcriptional regulation of PHB1 could explain this accumulation. Interestingly, most of melanoma patients have down-regulation of microRNA-195. Here, we investigate the role of miR-195, its impact on PHB1 expression, and on chemosensitivity in melanoma cells. Methods TCGA-RNAseq data obtained from 341 melanoma patient samples as well as a panel of melanoma cell lines were used in an expression correlation analysis between PHB1 and predicted miRNAs. miR-195 impact on PHB1 mRNA and protein levels and relevance of this regulation were investigated in UACC-62 and SK-MEL-5 melanoma lines by RT-qPCR and western blot, luciferase reporter and genetic rescue experiments. Cell proliferation, cell-cycle analysis and caspase 3/7 assay were performed to investigate the potential action of miR-195 as chemosensitizer in melanoma cells treated with cisplatin and temozolomide. Results Analysis of the TCGA-RNAseq revealed a significant negative correlation (Pearson) between miR-195 and PHB1 expression. Moreover, RT-qPCR data showed that miR-195 is down-regulated while PHB1 is up-regulated in a collection of melanoma cells. We demonstrated that miR-195 regulates PHB1 directly by RT-qPCR and western blot in melanoma cells and luciferase assays. To establish PHB1 as a relevant target of miR-195, we conducted rescue experiments in which we showed that PHB1 transgenic expression could antagonize the suppressive effect miR-195 on the proliferation of melanoma cells. Finally, transfection experiments combined with drug treatments performed in the UACC-62 and SK-MEL-5 melanoma cells corroborated miR-195 as potential anti-proliferative agent, with potential impact in sensitization of melanoma cell death. Conclusions This study support the role of miR-195 as anti-proliferative miRNA via targeting of PHB1 in melanoma cells. Electronic supplementary material The online version of this article (10.1186/s12885-017-3721-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Priscila Daniele Ramos Cirilo
- Instituto do Câncer do Estado de São Paulo, Centro de Investigação Translacional em Oncologia, Laboratório de Oncologia Experimental, Av. Dr. Arnaldo,251, São Paulo, SP, CEP 01246-000, Brazil.,The University of Texas Health Science Center at San Antonio, Children's Cancer Research Institute, 7703 Floyd Curl Drive, San Antonio, TX, 78229-390, USA.,Instituto Hermes Pardini, Setor de Pesquisa e Desenvolvimento, Av das Nações, 2448, Distrito Industrial, Vespasiano, MG, CEP 33200-000, Brazil
| | - Luciana Nogueira de Sousa Andrade
- Instituto do Câncer do Estado de São Paulo, Centro de Investigação Translacional em Oncologia, Laboratório de Oncologia Experimental, Av. Dr. Arnaldo,251, São Paulo, SP, CEP 01246-000, Brazil
| | - Bruna Renata Silva Corrêa
- The University of Texas Health Science Center at San Antonio, Children's Cancer Research Institute, 7703 Floyd Curl Drive, San Antonio, TX, 78229-390, USA.,Instituto Sírio-Libanês de Ensino e Pesquisa, Centro de Oncologia Molecular, Rua Prof. Daher Cutait, 69, São Paulo, SP, CEP 01308-060, Brazil
| | - Mei Qiao
- The University of Texas Health Science Center at San Antonio, Children's Cancer Research Institute, 7703 Floyd Curl Drive, San Antonio, TX, 78229-390, USA
| | - Tatiane Katsue Furuya
- Instituto do Câncer do Estado de São Paulo, Centro de Investigação Translacional em Oncologia, Laboratório de Oncologia Experimental, Av. Dr. Arnaldo,251, São Paulo, SP, CEP 01246-000, Brazil
| | - Roger Chammas
- Instituto do Câncer do Estado de São Paulo, Centro de Investigação Translacional em Oncologia, Laboratório de Oncologia Experimental, Av. Dr. Arnaldo,251, São Paulo, SP, CEP 01246-000, Brazil
| | - Luiz Otavio Ferraz Penalva
- The University of Texas Health Science Center at San Antonio, Children's Cancer Research Institute, 7703 Floyd Curl Drive, San Antonio, TX, 78229-390, USA.
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29
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Kim DM, Jang H, Shin MG, Kim JH, Shin SM, Min SH, Kim IC. β-catenin induces expression of prohibitin gene in acute leukemic cells. Oncol Rep 2017; 37:3201-3208. [PMID: 28440457 PMCID: PMC5442404 DOI: 10.3892/or.2017.5599] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 04/03/2017] [Indexed: 01/09/2023] Open
Abstract
Prohibitin (PHB) is a multifunctional protein conserved in eukaryotic systems and shows various expression levels in tumor cells. However, regulation of PHB is not clearly understood. Here, we focused on the regulation of PHB expression by Wnt signaling, one of dominant regulatory signals in various leukemic cells. High mRNA levels of PHB were found in half of clinical leukemia samples. PHB expression was increased by inhibition of the MAPK pathway and decreased by activation of EGF signal. Although cell proliferating signals downregulated the transcription of PHB, treatment with lithium chloride, an analog of the Wnt signal, induced PHB level in various cell types. We identified the TCF-4/LEF-1 binding motif, CATCTG, in the promoter region of PHB by site-directed mutagenesis and ChIP assay. This β-catenin-mediated activation of PHB expression was independent of c‑MYC activation, a product of Wnt signaling. These data indicate that PHB is a direct target of β-catenin and the increased level of PHB in leukemia can be regulated by Wnt signaling.
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Affiliation(s)
- Dong Min Kim
- Center for Applied Life Science, Hanbat National University, Daejon 305-719, Republic of Korea
| | - Hanbit Jang
- Medical Proteomics Research Center, KRIBB, Daejon 305-806, Republic of Korea
| | - Myung Geun Shin
- Department of Laboratory Medicine, Chonnam National University Hwasun Hospital, Chonnam National University, Hwasun 519-763, Republic of Korea
| | - Jeong-Hoon Kim
- Medical Proteomics Research Center, KRIBB, Daejon 305-806, Republic of Korea
| | - Sang Mo Shin
- Center for Applied Life Science, Hanbat National University, Daejon 305-719, Republic of Korea
| | - Sang-Hyun Min
- New Drug Development Center, DGMIF, Daegu 701-310, Republic of Korea
| | - Il-Chul Kim
- Department of Biological Sciences, Chonnam National University, Gwangju 500-757, Republic of Korea
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30
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Mishra S, Nyomba BG. Prohibitin - At the crossroads of obesity-linked diabetes and cancer. Exp Biol Med (Maywood) 2017; 242:1170-1177. [PMID: 28399645 DOI: 10.1177/1535370217703976] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The promoter of a gene that is selectively expressed in just a few cell types provides unique opportunities to study: (1) the pleiotropic function of a protein in two different cell types including the cell compartment specific function, and (2) the crosstalk between two cell/tissue types at the systemic level. This is not possible with a ubiquitous or a highly specific gene promoter. The adipocyte protein-2 ( aP2) is one such gene. It is primarily expressed in adipocytes, but also selectively in monocytic macrophages and dendritic cells, among various immune cell types. Thus, the adipocyte protein-2 gene promoter provides an opportunity to simultaneously manipulate adipose and immune functions in a transgenic animal. Prohibitin (PHB) is a pleiotropic protein that has roles in both adipocytes and immune cells. Adipocyte specific functions of prohibitin are mediated through its mitochondrial function, whereas its immune functions are mediated in a phosphorylation-dependent manner. We capitalized on this attribute of prohibitin to explore the crosstalk between adipose and immune functions, and to discern mitochondrial and plasma membrane-associated cell signaling functions of prohibitin, by expressing wild type prohibitin (Mito-Ob) and a phospho-mutant form of prohibitin (m-Mito-Ob) from the protein-2 gene promoter, individually. Both transgenic mice develop obesity in a sex-neutral manner, but develop obesity-related metabolic dysregulation in a male sex-specific manner. Subsequently, the male Mito-Ob mice spontaneously developed type 2 diabetes and liver cancer, whereas the male m-Mito-Ob mice developed lymph node tumors or autoimmune diabetes in a context-dependent manner. This review provides a point of view on the role of prohibitin in mediating sex differences in adipose and immune functions at the systemic level. We discuss the unique attributes of prohibitin and provide a new paradigm in adipose-immune crosstalk mediated through a pleiotropic protein. Impact statement Prohibitin (PHB) is ubiquitously expressed and plays a role in adipocyte-immune cell cross-talk. Both male and female transgenic mice expressing wild-type PHB in adipose tissue and in macrophages are obese, but only males develop diabetes and liver cancer. When the mice express PHB mutated on tyrosine-114 in adipocytes and macrophages, both males and females are still obese, but none develops liver cancer; instead, males develop lymph node tumors. Adipocyte specific functions of PHB are mediated through its mitochondrial function, whereas its immune functions are mediated in a phosphorylation-dependent manner. Thus, PHB appears to be an important molecule linking obesity, diabetes, and cancer. In addition, this link appears to be affected by sex steroids. Therefore, targeting PHB may lead to a better understanding of the pathogenesis of obesity, diabetes and cancer.
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Affiliation(s)
- Suresh Mishra
- 1 Department of Internal Medicine, University of Manitoba, Winnipeg R3E3P4, Canada.,2 Department of Physiology & Pathophysiology, University of Manitoba, Winnipeg R3E3P4, Canada
| | - Bl Grégoire Nyomba
- 1 Department of Internal Medicine, University of Manitoba, Winnipeg R3E3P4, Canada
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Abstract
Human retinoblastoma gene RB1 is the first tumor suppressor gene (TSG) isolated by positional cloning in 1986. RB is extensively studied for its ability to regulate cell cycle by binding to E2F1 and inhibiting the transcriptional activity of the latter. In human embryonic stem cells (ESCs), only a minute trace of RB is found in complex with E2F1. Increased activity of RB triggers differentiation, cell cycle arrest, and cell death. On the other hand, inactivation of the entire RB family (RB1, RBL1, and RBL2) in human ESC induces G2/M arrest and cell death. These observations indicate that both loss and overactivity of RB could be lethal for the stemness of cells. A question arises why inactive RB is required for the survival and stemness of cells? To shed some light on this question, we analyzed the RB-binding proteins. In this review we have focused on 27 RB-binding partners that may have potential roles in different aspects of stem cell biology.
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Affiliation(s)
- M Mushtaq
- Karolinska Institutet, Stockholm, Sweden
| | | | - E V Kashuba
- Karolinska Institutet, Stockholm, Sweden; R.E. Kavetsky Institute of Experimental Pathology, Oncology and Radiobiology, NASU, Kyiv, Ukraine.
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32
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Cao Y, Liang H, Zhang F, Luan Z, Zhao S, Wang XA, Liu S, Bao R, Shu Y, Ma Q, Zhu J, Liu Y. Prohibitin overexpression predicts poor prognosis and promotes cell proliferation and invasion through ERK pathway activation in gallbladder cancer. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2016; 35:68. [PMID: 27084680 PMCID: PMC4833931 DOI: 10.1186/s13046-016-0346-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Accepted: 04/11/2016] [Indexed: 12/17/2022]
Abstract
Background Prohibitin (PHB), a pleiotropic protein overexpressed in several tumor types, has been implicated in the regulation of cell proliferation, invasive migration and survival. However, PHB expression and its biological function in gallbladder cancer (GBC) remain largely unknown. Methods PHB and p-ERK protein expressions were determined in human GBC tissues by immunohistochemistry (IHC). The effects of PHB knockdown on GBC cell proliferation and invasiveness were evaluated using Cell Counting Kit-8 (CCK-8) cell viability, cell cycle analysis, transwell invasion and gelatin zymography assays. Subcutaneous xenograft and tail vein-lung metastasis tumor models in nude mice were employed to further substantiate the role of PHB in GBC progression. Results PHB protein was overexpressed in GBC tissues and was significantly associated with histological grade, tumor stage and perineural invasion. Furthermore, PHB expression was negatively associated with overall survival in GBC patients. In vitro experimental studies demonstrated that the downregulation of PHB expression by lentivirus-mediated shRNA interference not only inhibited the ERK pathway activation but also reduced the proliferative and invasive capacities of GBC cells. Moreover, PD0325901, a specific inhibitor of MEK, markedly impaired PHB- mediated phosphorylation of ERK protein. IHC statistical analyses further validated that PHB expression was positively correlated with ERK protein phosphorylation levels in GBC tissue samples. In vivo, PHB depletion also resulted in dramatic reductions in the growth and metastasis of GBC cells. Conclusion Our findings demonstrate that PHB overexpression predicts poor survival in GBC patients. PHB could serve as a novel prognostic biomarker and a potential therapeutic target for GBCs. Electronic supplementary material The online version of this article (doi:10.1186/s13046-016-0346-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yang Cao
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China
| | - Haibin Liang
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China
| | - Fei Zhang
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China
| | - Zhou Luan
- Department of Gastroenterology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Road, Wuhan, Hubei, 430030, P.R. China
| | - Shuai Zhao
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China
| | - Xu-An Wang
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China
| | - Shibo Liu
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China
| | - Runfa Bao
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China
| | - Yijun Shu
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China
| | - Qiang Ma
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China
| | - Jian Zhu
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China. .,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China.
| | - Yingbin Liu
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China. .,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China.
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Koifman L, Ornellas P, Ornellas AA, Pereira DDA, Zingali BR, Cavalcanti SMB, Afonso LA, Sandim V, Alves G. Proteomics analysis of tissue samples from patients with squamous cell carcinoma of the penis and positive to human papillomavirus. Int Braz J Urol 2016; 41:642-54. [PMID: 26401855 PMCID: PMC4756991 DOI: 10.1590/s1677-5538.ibju.2014.0051] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 06/25/2014] [Indexed: 01/09/2023] Open
Abstract
PURPOSE The aim of this study was to identify possible protein biomarkers and/or candidates for therapeutic targets in tissues of patients with SCCP, infected by HPV, applying one dimensional electrophoresis (1DE), followed by direct mass spectrometry (MS) analysis. MATERIALS AND METHODS Tissues from 10 HPV positive patients with SCCP and from 10 patients with HPV negative non-tumorous penile foreskins were analyzed applying 1D electrophoresis, followed by analysis with direct mass spectrometry (MS). RESULTS Sixty-three different proteins were identified in the first group and 50 in the second group. Recognition was possible for 28 proteins exclusively detected in Group 1 and 21 proteins presented only in Group 2. CONCLUSION Some proteins in the first group are directly involved in the development of other types of cancer, and therefore, suitable for analysis. Complement C3 protein is a strong candidate for evaluating SCCP patients.
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Affiliation(s)
- Leandro Koifman
- Serviço de Urologia, Hospital Municipal Souza Aguiar, Rio de Janeiro, Rio de Janeiro,Brasil.,Serviço de Urologia, Hospital Mário Kröeff, Rio de Janeiro, Rio de Janeiro, Brasil.,Serviço de Hematologia, Instituto Nacional de Câncer - Laboratório de Genética Aplicada, Rio de Janeiro, Rio de Janeiro, Brasil
| | - Paulo Ornellas
- Serviço de Hematologia, Instituto Nacional de Câncer - Laboratório de Genética Aplicada, Rio de Janeiro, Rio de Janeiro, Brasil.,Programa de Pós-Graduação em Ciências Médicas (PGCM), Universidade Estadual do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Antonio Augusto Ornellas
- Serviço de Urologia, Hospital Mário Kröeff, Rio de Janeiro, Rio de Janeiro, Brasil.,Departmento de Urologia, Instituto Nacional de Câncer, Rio de Janeiro, Brasil
| | - Denise de Abreu Pereira
- Serviço de Hematologia, Instituto Nacional de Câncer - Laboratório de Genética Aplicada, Rio de Janeiro, Rio de Janeiro, Brasil.,Instituto Nacional de Câncer - Programa de Carcinogênese Molecular, Coordenação Geral de Ensino e Pesquisa, Rio de Janeiro, Brasil.,Universidade Federal do Rio de Janeiro - Instituto de Bioquímica Médica, Unidade de Espectrometria de Massas e Proteômica, Instituto Nacional de Biologia Estrutural e Bioimagem (INBEB), Rio de Janeiro, Brasil
| | - Benedeta Russolina Zingali
- Universidade Federal do Rio de Janeiro - Instituto de Bioquímica Médica, Unidade de Espectrometria de Massas e Proteômica, Instituto Nacional de Biologia Estrutural e Bioimagem (INBEB), Rio de Janeiro, Brasil
| | - Silvia Maria Baeta Cavalcanti
- Universidade Federal Fluminense - Laboratório de Diagnóstico Virológico, Departamento de Microbiologia e Parasitologia, Instituto Biomédico, Rio de Janeiro, Brasil
| | - Larissa Alves Afonso
- Universidade Federal Fluminense - Laboratório de Diagnóstico Virológico, Departamento de Microbiologia e Parasitologia, Instituto Biomédico, Rio de Janeiro, Brasil
| | - Vanessa Sandim
- Serviço de Hematologia, Instituto Nacional de Câncer - Laboratório de Genética Aplicada, Rio de Janeiro, Rio de Janeiro, Brasil.,Universidade Federal do Rio de Janeiro - Instituto de Bioquímica Médica, Unidade de Espectrometria de Massas e Proteômica, Instituto Nacional de Biologia Estrutural e Bioimagem (INBEB), Rio de Janeiro, Brasil
| | - Gilda Alves
- Serviço de Hematologia, Instituto Nacional de Câncer - Laboratório de Genética Aplicada, Rio de Janeiro, Rio de Janeiro, Brasil
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Sehrawat U, Pokhriyal R, Gupta AK, Hariprasad R, Khan MI, Gupta D, Naru J, Singh SB, Mohanty AK, Vanamail P, Kumar L, Kumar S, Hariprasad G. Comparative Proteomic Analysis of Advanced Ovarian Cancer Tissue to Identify Potential Biomarkers of Responders and Nonresponders to First-Line Chemotherapy of Carboplatin and Paclitaxel. BIOMARKERS IN CANCER 2016; 8:43-56. [PMID: 26997873 PMCID: PMC4795487 DOI: 10.4137/bic.s35775] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 02/08/2016] [Accepted: 02/11/2016] [Indexed: 12/16/2022]
Abstract
Conventional treatment for advanced ovarian cancer is an initial debulking surgery followed by chemotherapy combination of carboplatin and paclitaxel. Despite initial high response, three-fourths of these women experience disease recurrence with a dismal prognosis. Patients with advanced-stage ovarian cancer who underwent cytoreductive surgery were enrolled and tissue samples were collected. Post surgery, these patients were started on chemotherapy and followed up till the end of the cycle. Fluorescence-based differential in-gel expression coupled with mass spectrometric analysis was used for discovery phase of experiments, and real-time polymerase chain reaction, Western blotting, and pathway analysis were performed for expression and functional validation of differentially expressed proteins. While aldehyde reductase, hnRNP, cyclophilin A, heat shock protein-27, and actin are upregulated in responders, prohibitin, enoyl-coA hydratase, peroxiredoxin, and fibrin-β are upregulated in the nonresponders. The expressions of some of these proteins correlated with increased apoptotic activity in responders and decreased apoptotic activity in nonresponders. Therefore, the proteins qualify as potential biomarkers to predict chemotherapy response.
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Affiliation(s)
- Urmila Sehrawat
- Department of Biophysics, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Ruchika Pokhriyal
- Department of Biophysics, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Ashish Kumar Gupta
- Department of Biophysics, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Roopa Hariprasad
- Department of Medical Oncology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Mohd Imran Khan
- Department of Biophysics, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Divya Gupta
- Department of Biophysics, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Jasmine Naru
- National Dairy Research Institute, Karnal, India
| | | | | | - Perumal Vanamail
- Department of Obstetrics and Gynecology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Lalit Kumar
- Department of Medical Oncology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Sunesh Kumar
- Department of Obstetrics and Gynecology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Gururao Hariprasad
- Department of Biophysics, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
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35
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Koushyar S, Jiang WG, Dart DA. Unveiling the potential of prohibitin in cancer. Cancer Lett 2015; 369:316-22. [PMID: 26450374 DOI: 10.1016/j.canlet.2015.09.012] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 09/16/2015] [Accepted: 09/19/2015] [Indexed: 12/18/2022]
Abstract
Recently, research has shed new light on the role of Prohibitin (PHB) in cancer pathogenesis across an array of cancer types. Important mechanisms for PHB have been unveiled in several cancers, especially with regard to the androgen independent state of prostate cancer (PC) and oestrogen dependent breast cancer. However, PHB is often overlooked due to its complex but subtle roles within the cell. Having gathered both historical and current research exploring PHB's role in different cancer types including prostate and breast, here we aim to pair this information with its molecular properties in the hope of translating this information into a clinical perspective, thus discussing its possible use in future cancer therapy.
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Affiliation(s)
- Sarah Koushyar
- Cardiff China Medical Research Collaborative (CCMRC), Cardiff University, School of Medicine, Henry Welcome Building, Heath Park, Cardiff CF14 4XN, UK.
| | - Wen G Jiang
- Cardiff China Medical Research Collaborative (CCMRC), Cardiff University, School of Medicine, Henry Welcome Building, Heath Park, Cardiff CF14 4XN, UK
| | - D Alwyn Dart
- Cardiff China Medical Research Collaborative (CCMRC), Cardiff University, School of Medicine, Henry Welcome Building, Heath Park, Cardiff CF14 4XN, UK
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36
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Nahar S, Ranjan N, Ray A, Arya DP, Maiti S. Potent inhibition of miR-27a by neomycin-bisbenzimidazole conjugates. Chem Sci 2015; 6:5837-5846. [PMID: 29861909 PMCID: PMC5947510 DOI: 10.1039/c5sc01969a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Accepted: 07/07/2015] [Indexed: 12/27/2022] Open
Abstract
miRNAs are important components of regulatory networks that control gene expression and have implications in various diseases including cancer. Targeting oncogenic miRNAs with small molecules is currently being explored to develop cancer therapeutics. Here, we report the development of dual binding neomycin-bisbenzimidazole conjugates that target oncogenic miR-27a with high affinity (Ka = 1.2 to 7.4 × 108 M-1). These conjugates bring significant reduction (∼65% at 5 μM) in mature miRNA levels and penetrate easily in the cells where they localise both in the cytoplasm and the nucleus. Cell cycle analysis showed significant increase in the G0/G1 phase (∼15%) and decrease in the S phase (∼7%) upon treatment with neomycin-bisbenzimidazole conjugates, suggesting inhibition of cell proliferation. Using the conjugation approach, we show that moderately binding ligands can be covalently combined into high affinity binders. This study also highlights the role of linker optimization in designing high affinity ligands for miR-27a targeting.
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Affiliation(s)
- Smita Nahar
- Academy of Scientific and Innovative Research (AcSIR) , Anusandhan Bhawan, 2 Rafi Marg , New Delhi-110001 , India
- CSIR-Institute of Genomics and Integrative Biology , Mathura Road , Delhi-110020 , India . ; ; Tel: +91-11-2766-6156
| | - Nihar Ranjan
- Department of Chemistry , Clemson University , Clemson , SC 29634 , USA
| | - Arjun Ray
- Academy of Scientific and Innovative Research (AcSIR) , Anusandhan Bhawan, 2 Rafi Marg , New Delhi-110001 , India
- CSIR-Institute of Genomics and Integrative Biology , Mathura Road , Delhi-110020 , India . ; ; Tel: +91-11-2766-6156
| | - Dev P Arya
- Department of Chemistry , Clemson University , Clemson , SC 29634 , USA
| | - Souvik Maiti
- Academy of Scientific and Innovative Research (AcSIR) , Anusandhan Bhawan, 2 Rafi Marg , New Delhi-110001 , India
- CSIR-Institute of Genomics and Integrative Biology , Mathura Road , Delhi-110020 , India . ; ; Tel: +91-11-2766-6156
- CSIR-National Chemical Laboratory , Dr. Homi Bhabha Road , Pune , 411008 , India . ;
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Choudhary I, Lee H, Pyo MJ, Heo Y, Bae SK, Kwon YC, Yoon WD, Kang C, Kim E. Proteomics approach to examine the cardiotoxic effects of Nemopilema nomurai Jellyfish venom. J Proteomics 2015; 128:123-31. [PMID: 26193491 DOI: 10.1016/j.jprot.2015.07.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2015] [Revised: 07/07/2015] [Accepted: 07/13/2015] [Indexed: 01/19/2023]
Abstract
UNLABELLED Nemopilema nomurai is one of the largest species of jellyfish in the world. It blooms mainly offshore of Korea, China, and Japan. Increasing population numbers of N. nomurai is increasing the risk of sea bathers to the jellyfish stings and accompanying envenomations. Cardiovascular effects, and cytotoxicity and hemolytic activities have been previously reported in rodent models. To understand the mechanism of cardiac toxicity, we examined the effect of N. nomurai jellyfish venom (NnV) at the proteome level on rat cardiomyocytes cell line H9c2 using two-dimensional gel electrophoresis and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF/MS). Cells treated with NnV displayed dose-dependent inhibition of viability. Cellular changes at proteome level were investigated after 6h and 12h of venom treatment. Electrophoretic examination revealed 72 protein spots displaying significant quantitative changes. These proteins were analyzed by MALDI-TOF/MS. Thirty four differentially expressed proteins were successfully identified; 24 proteins increased in quantity and 10 proteins decreased, compared to the respective controls. Proteins altered in content in Western blot analyses included myosin VII, annexin A2, aldose reductase, suppressor of cytokine signaling 1 (SOCS1), and calumenin, which are well-known marker proteins of cardiac dysfunctions. BIOLOGICAL SIGNIFICANCE This is the first report revealing the cardiac toxicity of NnV at the proteome level. NnV directly targeted proteins involved in cardiac dysfunction or maintenance. Suppressor of cytokine signaling 1 (SOCS1), which inhibits the Janus kinase/signal transducers and activators of transcription (JAK/STAT) pathway, was upregulated by NnV. Other proteins related to cardiac arrest that were over-expressed included aldose reductase and calumenin. These results clarify the underlying mechanism of cardiomyocyte damage caused by NnV. By inhibiting these particular targets and more precisely identifying the components of NnV-mediated cardiac toxicity, jellyfish venom-associated poisoning could be reduced or prevented.
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Affiliation(s)
- Indu Choudhary
- College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Hyunkyoung Lee
- College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Min-Jung Pyo
- College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Yunwi Heo
- College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Seong Kyeong Bae
- College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Young Chul Kwon
- College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Won Duk Yoon
- Headquarters for Marine Environment, National Fisheries Research & Development Institute, Shiran-ri, Gijang-eup, Gijang-gun, Busan 619-705, Republic of Korea
| | - Changkeun Kang
- College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea; Institutes of Agriculture and Life Science, Gyeongsang National University, Jinju, Republic of Korea
| | - Euikyung Kim
- College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea; Institute of Animal Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea.
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38
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Rossi L, Bonuccelli L, Iacopetti P, Evangelista M, Ghezzani C, Tana L, Salvetti A. Prohibitin 2 regulates cell proliferation and mitochondrial cristae morphogenesis in planarian stem cells. Stem Cell Rev Rep 2015; 10:871-87. [PMID: 24974103 DOI: 10.1007/s12015-014-9540-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Prohibitins are pleiotropic proteins, whose multiple roles are emerging as key elements in the regulation of cell survival and proliferation. Indeed, prohibitins interact with several intracellular proteins strategically involved in the regulation of cell cycle progression in response to extracellular growth signals. Prohibitins also have regulatory functions in mitochondrial fusion and cristae morphogenesis, phenomena related to the ability of self-renewing embryonic stem cells to undergo differentiation, during which mitochondria develop numerous cristae, increase in number, and generate an extensive reticular network. We recently identified a Prohibitin 2 homolog (DjPhb2) that is expressed in adult stem cells (neoblasts) of planarians, a well-known model system for in vivo studies on stem cells and tissue regeneration. Here, we show that in DjPhb2 silenced planarians, most proliferating cells disappear, with the exception of a subpopulation of neoblasts localized along the dorsal body midline. Neoblast depletion impairs regeneration and, finally, leads animals to death. Our in vivo findings demonstrate that prohibitin 2 plays an important role in regulating stem cell biology, being involved in both the control of cell cycle progression and mitochondrial cristae morphogenesis.
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Affiliation(s)
- Leonardo Rossi
- Unit of Experimental Biology and Genetics, Department of Clinical and Experimental Medicine, University of Pisa, Via Volta 4, 56126, Pisa, Italy
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MicroRNA-27a Contributes to Rhabdomyosarcoma Cell Proliferation by Suppressing RARA and RXRA. PLoS One 2015; 10:e0125171. [PMID: 25915942 PMCID: PMC4410939 DOI: 10.1371/journal.pone.0125171] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Accepted: 03/21/2015] [Indexed: 12/21/2022] Open
Abstract
Background Rhabdomyosarcomas (RMS) are rare but very aggressive childhood tumors that arise as a consequence of a regulatory disruption in the growth and differentiation pathways of myogenic precursor cells. According to morphological criteria, there are two major RMS subtypes: embryonal RMS (ERMS) and alveolar RMS (ARMS) with the latter showing greater aggressiveness and metastatic potential with respect to the former. Efforts to unravel the complex molecular mechanisms underlying RMS pathogenesis and progression have revealed that microRNAs (miRNAs) play a key role in tumorigenesis. Methodology/Principal Findings The expression profiles of 8 different RMS cell lines were analyzed to investigate the involvement of miRNAs in RMS. The miRNA population from each cell line was compared to a reference sample consisting of a balanced pool of total RNA extracted from those 8 cell lines. Sixteen miRNAs whose expression discriminates between translocation-positive ARMS and negative RMS were identified. Attention was focused on the role of miR-27a that is up-regulated in the more aggressive RMS cell lines (translocation-positive ARMS) in which it probably acts as an oncogene. MiR-27a overexpressing cells showed a significant increase in their proliferation rate that was paralleled by a decrease in the number of cells in the G1 phase of the cell cycle. It was possible to demonstrate that miR-27a is implicated in cell cycle control by targeting the retinoic acid alpha receptor (RARA) and retinoic X receptor alpha (RXRA). Conclusions Study results have demonstrated that miRNA expression signature profiling can be used to classify different RMS subtypes and suggest that miR-27a may have a therapeutic potential in RMS by modulating the expression of retinoic acid receptors.
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40
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Schaal C, Pillai S, Chellappan SP. The Rb-E2F transcriptional regulatory pathway in tumor angiogenesis and metastasis. Adv Cancer Res 2015; 121:147-182. [PMID: 24889531 DOI: 10.1016/b978-0-12-800249-0.00004-4] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The retinoblastoma tumor suppressor protein Rb plays a major role in regulating G1/S transition and is a critical regulator of cell proliferation. Rb protein exerts its growth regulatory properties mainly by physically interacting with the transcriptionally active members of the E2F transcription factor family, especially E2Fs 1, 2, and 3. Given its critical role in regulating cell proliferation, it is not surprising that Rb is inactivated in almost all tumors, either through the mutation of Rb gene itself or through the mutations of its upstream regulators including K-Ras and INK4. Recent studies have revealed a significant role for Rb and its downstream effectors, especially E2Fs, in regulating various aspects of tumor progression, angiogenesis, and metastasis. Thus, components of the Rb-E2F pathway have been shown to regulate the expression of genes involved in angiogenesis, including VEGF and VEGFR, genes involved in epithelial-mesenchymal transition including E-cadherin and ZEB proteins, and genes involved in invasion and migration like matrix metalloproteinases. Rb has also been shown to play a major role in the functioning of normal and cancer stem cells; further, Rb and E2F appear to play a regulatory role in the energy metabolism of cancer cells. These findings raise the possibility that mutational events that initiate tumorigenesis by inducing uncontrolled cell proliferation might also contribute to the progression and metastasis of cancers through the mediation of the Rb-E2F transcriptional regulatory pathway. This review highlights these recent studies on tumor promoting functions of the Rb-E2F pathway.
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Affiliation(s)
- Courtney Schaal
- Department of Tumor Biology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - Smitha Pillai
- Department of Tumor Biology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - Srikumar P Chellappan
- Department of Tumor Biology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA.
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41
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Akt phosphorylates Prohibitin 1 to mediate its mitochondrial localization and promote proliferation of bladder cancer cells. Cell Death Dis 2015; 6:e1660. [PMID: 25719244 PMCID: PMC4669803 DOI: 10.1038/cddis.2015.40] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2014] [Revised: 12/07/2014] [Accepted: 12/19/2014] [Indexed: 12/29/2022]
Abstract
Bladder cancer (BC) is very common and associated with significant morbidity and mortality, though the molecular underpinnings of its origination and progression remain poorly understood. In this study, we demonstrate that Prohibitin 1 (PHB) was overexpressed in human BC tissues and that PHB upregulation was associated with poor prognosis. We also found that PHB was necessary and sufficient for BC cell proliferation. Interestingly, the overexpressed PHB was primarily found within mitochondria, and we provide the first direct evidence that phosphorylation by Akt at Thr258 of PHB induces this mitochondrial localization. Inhibiton of Akt reverses these effects and inhibited the proliferation of BC cells. Finally, the phosphorylation of PHB was required for BC cell proliferation, further implicating the importance of the Akt in BC. Taken together, these findings identify the Akt/PHB signaling cascade as a novel mechanism of cancer cell proliferation and provide the scientific basis for the establishment of PHB as a new prognostic marker and treatment target for BC.
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42
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Li T, Wang Y, Gao Y, Li Q. Identification and characterisation of the anti-oxidative stress properties of the lamprey prohibitin 2 gene. FISH & SHELLFISH IMMUNOLOGY 2015; 42:447-456. [PMID: 25463290 DOI: 10.1016/j.fsi.2014.11.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 11/13/2014] [Accepted: 11/17/2014] [Indexed: 06/04/2023]
Abstract
The highly conserved protein prohibitin 2 (PHB2) has been implicated as a cell-surface receptor in the regulation of proliferation, apoptosis, transcription, and mitochondrial protein folding. In the present study, we identified a Lampetra morii homologue of PHB2, Lm-PHB2, showing greater than 61.8% sequence identity with its homologues. Phylogenetic analysis indicated that the position of Lm-PHB2 is consistent with lamprey phylogeny. Expression of the Lm-PHB2 protein was nearly equivalent in the heart, liver, kidneys, intestines, and muscles of normal lampreys. However, the Lm-PHB2 protein was down-regulated in the myocardia of lampreys challenged for 5 days with adriamycin (Adr), followed by a significant up-regulation 10 days after treatment. In vitro, recombinant Lm-PHB2 (rLm-PHB2) protein could significantly enhance the H2O2-induced oxidative stress tolerance in Chang liver (CHL) cells. Further mechanism studies indicated that the nucleus-to-mitochondria translocation of Lm-PHB2 was closely involved in the oxidative stress protection. Our results suggests that the strategies to modulate Lm-PHB2 levels may constitute a novel therapeutic approach for myocardial injury and liver inflammatory diseases, conditions in which oxidative stress plays a critical role in tissue injury and inflammation.
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Affiliation(s)
- Tiesong Li
- Life Science College of Liaoning Normal University, Dalian 116029, China; Lamprey Research Centre, Liaoning Normal University, Dalian 116029, China.
| | - Ying Wang
- Life Science College of Liaoning Normal University, Dalian 116029, China; Lamprey Research Centre, Liaoning Normal University, Dalian 116029, China
| | - Yang Gao
- Life Science College of Liaoning Normal University, Dalian 116029, China; Lamprey Research Centre, Liaoning Normal University, Dalian 116029, China
| | - Qingwei Li
- Life Science College of Liaoning Normal University, Dalian 116029, China; Lamprey Research Centre, Liaoning Normal University, Dalian 116029, China.
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43
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miR-361-regulated prohibitin inhibits mitochondrial fission and apoptosis and protects heart from ischemia injury. Cell Death Differ 2014; 22:1058-68. [PMID: 25501599 DOI: 10.1038/cdd.2014.200] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Revised: 10/07/2014] [Accepted: 10/20/2014] [Indexed: 11/08/2022] Open
Abstract
Cardiovascular disease remains the leading cause of morbidity and mortality worldwide. Emerging evidences suggest that the abnormal mitochondrial fission participates in pathogenesis of cardiac diseases, including myocardial infarction (MI) and heart failure. However, the molecular components regulating mitochondrial network in the heart remain largely unidentified. Here we report that miR-361 and prohibitin 1 (PHB1) constitute an axis that regulates mitochondrial fission and apoptosis. The results show that PHB1 attenuates mitochondrial fission and apoptosis in response to hydrogen peroxide treatment in cardiomyocytes. Cardiac-specific PHB1 transgenic mice show reduced mitochondrial fission and myocardial infarction sizes after myocardial infarction surgery. MiR-361 is responsible for the dysfunction of PHB1 and suppresses the translation of PHB1. Knockdown of miR-361 reduces mitochondrial fission and apoptosis in vivo and in vitro. MiR-361 cardiac-specific transgenic mice represent elevated mitochondrial fission and myocardial infarction sizes upon myocardial ischemia injury. This study identifies a novel signaling pathway composed of miR-361 and PHB1 that regulates mitochondrial fission program and apoptosis. This discovery will shed new light on the therapy of myocardial infarction and heart failure.
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Matsuyama S, Nakano Y, Nakamura M, Yamamoto R, Shimada T, Ohashi F, Kubo K. Cloning and expression analysis of prohibitin mRNA in canine mammary tumors. J Vet Med Sci 2014; 77:101-4. [PMID: 25312047 PMCID: PMC4349545 DOI: 10.1292/jvms.14-0239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Prohibitin is an antiproliferative protein that is a product of a putative tumor
suppressor gene. However, there is little information on prohibitins in companion animals.
In this study, we cloned canine prohibitin mRNA using RT-PCR and 3′-RACE (Rapid
Amplification of cDNA Ends). The sequence was well conserved compared with those of other
mammals, including human. The deduced amino acid sequence translated from the open reading
frame completely corresponded to the human sequence. Canine prohibitin mRNA was expressed
in all normal mammary and tumor samples examined. These results suggest that this protein
plays a vital role in cell growth mechanisms and may be related to the occurrence of
canine mammary tumors.
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Affiliation(s)
- Satoshi Matsuyama
- Laboratory of Veterinary Radiology, Division of Veterinary Sciences, Osaka Prefecture University, 1-58 Rinku-ohraikita, Izumisano Osaka 598-8531, Japan
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Baqader NO, Radulovic M, Crawford M, Stoeber K, Godovac-Zimmermann J. Nuclear cytoplasmic trafficking of proteins is a major response of human fibroblasts to oxidative stress. J Proteome Res 2014; 13:4398-423. [PMID: 25133973 PMCID: PMC4259009 DOI: 10.1021/pr500638h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We have used a subcellular spatial razor approach based on LC-MS/MS-based proteomics with SILAC isotope labeling to determine changes in protein abundances in the nuclear and cytoplasmic compartments of human IMR90 fibroblasts subjected to mild oxidative stress. We show that response to mild tert-butyl hydrogen peroxide treatment includes redistribution between the nucleus and cytoplasm of numerous proteins not previously associated with oxidative stress. The 121 proteins with the most significant changes encompass proteins with known functions in a wide variety of subcellular locations and of cellular functional processes (transcription, signal transduction, autophagy, iron metabolism, TCA cycle, ATP synthesis) and are consistent with functional networks that are spatially dispersed across the cell. Both nuclear respiratory factor 2 and the proline regulatory axis appear to contribute to the cellular metabolic response. Proteins involved in iron metabolism or with iron/heme as a cofactor as well as mitochondrial proteins are prominent in the response. Evidence suggesting that nuclear import/export and vesicle-mediated protein transport contribute to the cellular response was obtained. We suggest that measurements of global changes in total cellular protein abundances need to be complemented with measurements of the dynamic subcellular spatial redistribution of proteins to obtain comprehensive pictures of cellular function.
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Affiliation(s)
- Noor O. Baqader
- Division of Medicine, Center for Nephrology, University College London, Royal Free Campus, Rowland Hill Street, London NW3 2PF, United Kingdom
| | - Marko Radulovic
- Division of Medicine, Center for Nephrology, University College London, Royal Free Campus, Rowland Hill Street, London NW3 2PF, United Kingdom
- Insitute of Oncology and Radiology, Pasterova 14, 11000 Belgrade, Serbia
| | - Mark Crawford
- Division of Medicine, Center for Nephrology, University College London, Royal Free Campus, Rowland Hill Street, London NW3 2PF, United Kingdom
| | - Kai Stoeber
- Research Department of Pathology and UCL Cancer Institute, Rockefeller Building, University College London, University Street, London WC1E 6JJ, United Kingdom
| | - Jasminka Godovac-Zimmermann
- Division of Medicine, Center for Nephrology, University College London, Royal Free Campus, Rowland Hill Street, London NW3 2PF, United Kingdom
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The Mcm2-7 replicative helicase: a promising chemotherapeutic target. BIOMED RESEARCH INTERNATIONAL 2014; 2014:549719. [PMID: 25243149 PMCID: PMC4163376 DOI: 10.1155/2014/549719] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 08/08/2014] [Accepted: 08/10/2014] [Indexed: 02/05/2023]
Abstract
Numerous eukaryotic replication factors have served as chemotherapeutic targets. One replication factor that has largely escaped drug development is the Mcm2-7 replicative helicase. This heterohexameric complex forms the licensing system that assembles the replication machinery at origins during initiation, as well as the catalytic core of the CMG (Cdc45-Mcm2-7-GINS) helicase that unwinds DNA during elongation. Emerging evidence suggests that Mcm2-7 is also part of the replication checkpoint, a quality control system that monitors and responds to DNA damage. As the only replication factor required for both licensing and DNA unwinding, Mcm2-7 is a major cellular regulatory target with likely cancer relevance. Mutations in at least one of the six MCM genes are particularly prevalent in squamous cell carcinomas of the lung, head and neck, and prostrate, and MCM mutations have been shown to cause cancer in mouse models. Moreover various cellular regulatory proteins, including the Rb tumor suppressor family members, bind Mcm2-7 and inhibit its activity. As a preliminary step toward drug development, several small molecule inhibitors that target Mcm2-7 have been recently discovered. Both its structural complexity and essential role at the interface between DNA replication and its regulation make Mcm2-7 a potential chemotherapeutic target.
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Pan L, Woodard JL, Lucas DM, Fuchs JR, Kinghorn AD. Rocaglamide, silvestrol and structurally related bioactive compounds from Aglaia species. Nat Prod Rep 2014; 31:924-39. [PMID: 24788392 PMCID: PMC4091845 DOI: 10.1039/c4np00006d] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Covering: 2006 to 2013. Investigations on the chemistry and biology of rocaglamide, silvestrol and structurally related bioactive compounds from Aglaia species during the period 2006-2013 are reviewed. Included are new phytochemical studies of naturally occurring rocaglamide derivatives, an update on synthetic methods for cyclopenta[b]benzofurans, and a description of the recent biological evaluation and mechanism-of-action studies on compounds of this type.
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Affiliation(s)
- Li Pan
- Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, Ohio 43210, United States
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Polymorphisms in the p27kip-1 and prohibitin genes denote novel genes associated with melanoma risk in Brazil, a high ultraviolet index region. Melanoma Res 2014; 23:231-6. [PMID: 23624368 DOI: 10.1097/cmr.0b013e3283612483] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Ultraviolet (UV) radiation is a major environmental risk factor to the development of cutaneous melanoma as it induces pyrimidine dimers in DNA. Genes that exert their function by arresting the cell cycle are critical to avoid carcinogenic mutations, allowing the processing of DNA repair systems. This study was carried out to evaluate the role of polymorphisms in cell cycle genes such as TP53, p27, CDKN2A, prohibitin, and GADD153 in melanoma risk as well as their influence on known risk factors in a high UV index region. A hospital-based case-control study was carried out in Brazil to evaluate the contribution of polymorphisms in cell cycle genes toward melanoma risk. The study comprised 202 melanoma patients and 210 controls. The polymorphisms analyzed were TP53 Arg72Pro, p27 Val109Gly, GADD153 Phe10Phe (rs697221), CDKN2A 3'UTR C540G, and prohibitin 3'UTR C1703T. As regards, p27 Val109Gly, both heterozygous and homozygous Gly genotypes were shown to be protective genotypes on calculating both crude and adjusted odds ratios (ORs) for age, sex, and educational level [OR 0.37; 95% confidence interval (CI) 0.16-0.87; P<0.05]. Similarly, the prohibitin TT genotype increased melanoma risk in the crude and adjusted analyses (OR 2.40; 95% CI 1.10-5.26; P<0.05). The p27 Gly protective genotype decreased the risk for melanoma in a stratified analysis of the known risk factors such as hair and eye color, sunburns, pigmented lesions, and European ancestry. The prohibitin TT genotype increased the risk of melanoma by such host factors. Our results showed for the first time that polymorphisms in p27 Val109Gly and in prohibitin 3'UTR C1703T genotypes modulate the risk to melanoma in a high UV index region.
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Mayank AK, Sharma S, Deshwal RK, Lal SK. LIMD1 antagonizes E2F1 activity and cell cycle progression by enhancing Rb function in cancer cells. Cell Biol Int 2014; 38:809-17. [DOI: 10.1002/cbin.10266] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Accepted: 01/30/2014] [Indexed: 12/12/2022]
Affiliation(s)
- Adarsh K. Mayank
- School of Life Sciences; Singhania University; Pacheri Beri Rajasthan India
| | - Shipra Sharma
- Virology Group; International Centre for Genetic Engineering and Biotechnology; Aruna Asaf Ali Marg New Delhi India
| | - Ravi K Deshwal
- Apex Institute of Management and Science; Jaipur Rajasthan
| | - Sunil K. Lal
- Virology Group; International Centre for Genetic Engineering and Biotechnology; Aruna Asaf Ali Marg New Delhi India
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Xu T, Fan X, Tan Y, Yue Y, Chen W, Gu X. Expression of PHB2 in rat brain cortex following traumatic brain injury. Int J Mol Sci 2014; 15:3299-318. [PMID: 24566151 PMCID: PMC3958913 DOI: 10.3390/ijms15023299] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Revised: 01/31/2014] [Accepted: 02/13/2014] [Indexed: 12/19/2022] Open
Abstract
Prohibitin2 (PHB2) is a ubiquitous, evolutionarily strongly conserved protein. It is one of the components of the prohibitin complex, which comprises two highly homologous subunits, PHB1 and PHB2. PHB2 is present in various cellular compartments including the nucleus and mitochondria. Recent studies have identified PHB2 as a multifunctional protein that controls cell proliferation, apoptosis, cristae morphogenesis and the functional integrity of mitochondria. However its distribution and function in the central nervous system (CNS) are not well understood. In this study, we examined PHB2 expression and cellular localization in rats after acute traumatic brain injury (TBI). Western Blot analysis showed PHB2 level was significantly enhanced at five days after injury compared to control, and then declined during the following days. The protein expression of PHB2 was further analyzed by immunohistochemistry. In comparison to contralateral cerebral cortex, we observed a highly significant accumulation of PHB2 at the ipsilateral brain. Immunofluorescence double-labeling showed that PHB2 was co-expressed with NeuN, GFAP. Besides, PHB2 also colocalized with activated caspase-3 and PCNA. To further investigate the function of PHB2, primary cultured astrocytes and the neuronal cell line PC12 were employed to establish a proliferation model and an apoptosis model, respectively, to simulate the cell activity after TBI to a certain degree. Knocking down PHB2 by siRNA partly increased the apoptosis level of PC12 stimulated by H2O2. While the PHB2 was interrupted by siRNA, the proliferation level of primary cultured astrocytes was inhibited notably than that in the control group. Together with our data, we hypothesized that PHB2 might play an important role in CNS pathophysiology after TBI.
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Affiliation(s)
- Ting Xu
- The Center Laboratory of Huai'an First People's Hospital Nanjing Medical University, Huai'an 223300, China.
| | - Xinjuan Fan
- Affiliated Hospital of Nantong University, Nantong 226001, China.
| | - Yuanyuan Tan
- Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, Nantong 226001, China.
| | - Ying Yue
- Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, Nantong 226001, China.
| | - Weijie Chen
- Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, Nantong 226001, China.
| | - Xingxing Gu
- Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, Nantong 226001, China.
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