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Lampart A, Krowarsch D, Biadun M, Sorensen V, Szymczyk J, Sluzalska K, Wiedlocha A, Otlewski J, Zakrzewska M. Intracellular FGF1 protects cells from apoptosis through direct interaction with p53. Cell Mol Life Sci 2023; 80:311. [PMID: 37783936 PMCID: PMC10545594 DOI: 10.1007/s00018-023-04964-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 08/28/2023] [Accepted: 09/12/2023] [Indexed: 10/04/2023]
Abstract
Fibroblast growth factor 1 (FGF1) acts by activating specific tyrosine kinase receptors on the cell surface. In addition to this classical mode of action, FGF1 also exhibits intracellular activity. Recently, we found that FGF1 translocated into the cell interior exhibits anti-apoptotic activity independent of receptor activation and downstream signaling. Here, we show that expression of FGF1 increases the survival of cells treated with various apoptosis inducers, but only when wild-type p53 is present. The p53-negative cells were not protected by either ectopically expressed or translocated FGF1. We also confirmed the requirement of p53 for the anti-apoptotic intracellular activity of FGF1 by silencing p53, resulting in loss of the protective effect of FGF1. In contrast, in p53-negative cells, intracellular FGF1 regained its anti-apoptotic properties after transfection with wild-type p53. We also found that FGF1 directly interacts with p53 in cells and that the binding region is located in the DBD domain of p53. We therefore postulate that intracellular FGF1 protects cells from apoptosis by directly interacting with p53.
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Affiliation(s)
- Agata Lampart
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - Daniel Krowarsch
- Department of Protein Biotechnology, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - Martyna Biadun
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
- Department of Protein Biotechnology, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - Vigdis Sorensen
- Advanced Light Microscopy Core Facility, Dept. Core Facilities, Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Montebello, Oslo, Norway
- Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Montebello, Oslo, Norway
| | - Jakub Szymczyk
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - Katarzyna Sluzalska
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - Antoni Wiedlocha
- Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Montebello, Oslo, Norway
- Department of Molecular Cell Biology, Institute for Cancer Research, Oslo University Hospital, Montebello, Oslo, Norway
| | - Jacek Otlewski
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - Malgorzata Zakrzewska
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland.
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2
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Asgharzade S, Talaei A, Farkhondeh T, Forouzanfar F. Combining Growth Factor and Stem Cell Therapy for Stroke Rehabilitation, A Review. Curr Drug Targets 2021; 21:781-791. [PMID: 31914912 DOI: 10.2174/1389450121666200107100747] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 11/28/2019] [Accepted: 12/18/2019] [Indexed: 12/12/2022]
Abstract
Stroke is a serious, life-threatening condition demanding vigorous search for new therapies. Recent research has focused on stem cell-based therapies as a viable choice following ischemic stroke, based on studies displaying that stem cells transplanted to the brain not only survive but also cause functional recovery. Growth factors defined as polypeptides that regulate the growth and differentiation of many cell types. Many studies have demonstrated that combined use of growth factors may increase results by the stimulation of endogenous neurogenesis, anti-inflammatory, neuroprotection properties, and enhancement of stem cell survival rates and so may be more effective than a single stem cell therapy. This paper reviews and discusses the most promising new stroke recovery research, including combination treatment.
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Affiliation(s)
- Samira Asgharzade
- Cellular and Molecular Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Andisheh Talaei
- Department of Biotechnology, College of Science, University of Tehran, Tehran, Iran
| | - Tahereh Farkhondeh
- Cardiovascular Diseases Research Center, Birjand University of Medical Sciences, Birjand, Iran
| | - Fatemeh Forouzanfar
- Neuroscience Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Neuroscience, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
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3
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Debons N, Dems D, Hélary C, Le Grill S, Picaut L, Renaud F, Delsuc N, Schanne-Klein MC, Coradin T, Aimé C. Differentiation of neural-type cells on multi-scale ordered collagen-silica bionanocomposites. Biomater Sci 2020; 8:569-576. [PMID: 31915761 DOI: 10.1039/c9bm01029g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Cells respond to biophysical and biochemical signals. We developed a composite filament from collagen and silica particles modified to interact with collagen and/or present a laminin epitope (IKVAV) crucial for cell-matrix adhesion and signal transduction. This combines scaffolding and signaling and shows that local tuning of collagen organization enhances cell differentiation.
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Affiliation(s)
- Nicolas Debons
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Paris, F-75005, France.
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4
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Sluzalska KD, Slawski J, Sochacka M, Lampart A, Otlewski J, Zakrzewska M. Intracellular partners of fibroblast growth factors 1 and 2 - implications for functions. Cytokine Growth Factor Rev 2020; 57:93-111. [PMID: 32475760 DOI: 10.1016/j.cytogfr.2020.05.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 05/04/2020] [Accepted: 05/07/2020] [Indexed: 01/01/2023]
Abstract
Fibroblast growth factors 1 and 2 (FGF1 and FGF2) are mainly considered as ligands of surface receptors through which they regulate a broad spectrum of biological processes. They are secreted in non-canonical way and, unlike other growth factors, they are able to translocate from the endosome to the cell interior. These unique features, as well as the role of the intracellular pool of FGF1 and FGF2, are far from being fully understood. An increasing number of reports address this problem, focusing on the intracellular interactions of FGF1 and 2. Here, we summarize the current state of knowledge of the FGF1 and FGF2 binding partners inside the cell and the possible role of these interactions. The partner proteins are grouped according to their function, including proteins involved in secretion, cell signaling, nucleocytoplasmic transport, binding and processing of nucleic acids, ATP binding, and cytoskeleton assembly. An in-depth analysis of the network of these binding partners could indicate novel, non-classical functions of FGF1 and FGF2 and uncover an additional level of a fine control of the well-known FGF-regulated cellular processes.
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Affiliation(s)
- Katarzyna Dominika Sluzalska
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, ul. F. Joliot-Curie 14a, 50-383 Wroclaw, Poland
| | - Jakub Slawski
- Department of Biophysics, Faculty of Biotechnology, University of Wroclaw, ul. F. Joliot-Curie 14a, 50-383 Wroclaw, Poland
| | - Martyna Sochacka
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, ul. F. Joliot-Curie 14a, 50-383 Wroclaw, Poland
| | - Agata Lampart
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, ul. F. Joliot-Curie 14a, 50-383 Wroclaw, Poland
| | - Jacek Otlewski
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, ul. F. Joliot-Curie 14a, 50-383 Wroclaw, Poland
| | - Malgorzata Zakrzewska
- Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, ul. F. Joliot-Curie 14a, 50-383 Wroclaw, Poland.
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5
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Kostas M, Lampart A, Bober J, Wiedlocha A, Tomala J, Krowarsch D, Otlewski J, Zakrzewska M. Translocation of Exogenous FGF1 and FGF2 Protects the Cell against Apoptosis Independently of Receptor Activation. J Mol Biol 2018; 430:4087-4101. [DOI: 10.1016/j.jmb.2018.08.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 07/30/2018] [Accepted: 08/06/2018] [Indexed: 01/16/2023]
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6
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Ghazavi H, Hoseini SJ, Ebrahimzadeh-Bideskan A, Mashkani B, Mehri S, Ghorbani A, Sadri K, Mahdipour E, Ghasemi F, Forouzanfar F, Hoseini A, Pasdar AR, Sadeghnia HR, Ghayour-Mobarhan M. Fibroblast Growth Factor Type 1 (FGF1)-Overexpressed Adipose-Derived Mesenchaymal Stem Cells (AD-MSC FGF1) Induce Neuroprotection and Functional Recovery in a Rat Stroke Model. Stem Cell Rev Rep 2018; 13:670-685. [PMID: 28795363 DOI: 10.1007/s12015-017-9755-z] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Stroke, as the second most common cause of death, imposes a great financial burden on both the individual and society. Mesenchymal stem cells from rodents have demonstrated efficacy in experimental animal models of stroke due to enhanced neurological recovery. Since FGF1 (fibroblast growth factor 1) displays neuroprotective properties, for the first time, we investigated the effect of acute intravenous administration of FGF1 gene transfected adipose-derived mesenchymal stem cell (AD-MSCFGF1) on transient experimental ischemic stroke in rats. Stroke induction was made by transient middle cerebral artery occlusion (tMCAO). 2 × 106 AD-MSCFGF1 was administrated intravenously 30 min after carotid reperfusion. The ability of technetium99m-hexamethyl propylene amine oxime (99mTc-HMPAO)-labeled AD-MSCFGF1 to enter into ischemic brain was evaluated 2 h post injection. 24 h post operation, the neurological recovery (rotarod and Roger's tests), the infarct volume (2, 3, 5-triphenyltetrazolium chloride, TTC assay), apoptosis rate (TUNEL assay), and the expression of FGF1 protein (western blotting) in the ischemic hemisphere were assessed. The 99mTc-HMPAO-labeled AD-MSCFGF1 could enter into the ischemic brain. Ischemic hemisphere activity was significantly higher than that observed in the contralateral hemisphere (p = 0.002). The administration of AD-MSCFGF1 resulted in significant improvement of neurological function tests and increased density of FGF1 protein in the peri-infarct area, while the infarct volume and the apoptotic index were significantly decreased, in comparison to the other treated groups. In conclusion, acute intravenous administration of AD-MSCFGF1 can be a novel and promising candidate approach for the treatment of ischemic stroke.
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Affiliation(s)
- Hamed Ghazavi
- Department of Medical Biotechnology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Seyed Javad Hoseini
- Department of Medical Biotechnology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - Baratali Mashkani
- Department of Biochemistry, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Soghra Mehri
- Pharmaceutical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ahmad Ghorbani
- Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Kayvan Sadri
- Nuclear Medicine Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Elahe Mahdipour
- Department of Medical Biotechnology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Faezeh Ghasemi
- Department of Biotechnology, Faculty of Medicine, Arak University of Medical Sciences, Arak, Iran
| | - Fatemeh Forouzanfar
- Department of Pharmacology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Azar Hoseini
- Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ali Reza Pasdar
- Department of Modern Sciences and Technologies, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamid Reza Sadeghnia
- Department of Pharmacology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran. .,Department of Modern Sciences and Technologies, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran. .,Division of Neurocognitive Sciences, Psychiatry and Behavioral Sciences Research Center, Mashhad University of Medical Sciences, Mashhad, 99199-91766, Iran.
| | - Majid Ghayour-Mobarhan
- Department of Modern Sciences and Technologies, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran. .,Biochemistry of Nutrition Research Center, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, 99199-91766, Iran. .,Cardiovascular Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
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7
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FGF1 induces resistance to chemotherapy in ovarian granulosa tumor cells through regulation of p53 mitochondrial localization. Oncogenesis 2018; 7:18. [PMID: 29467390 PMCID: PMC5833868 DOI: 10.1038/s41389-018-0033-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 01/10/2018] [Indexed: 01/04/2023] Open
Abstract
Ovarian cancer remains associated with a high mortality rate and relapse is too frequently seen after chemotherapeutic treatment of granulosa cell tumors (GCTs) or epithelial ovarian cancers (EOCs). It is thus of major importance to progress in the knowledge of the molecular mechanisms underlying chemoresistance of ovarian tumors. Overexpression of Fibroblast Growth Factor 1 (FGF1) is observed in various cancers, correlates with poor survival and could be responsible for resistance to platinum-based chemotherapy of serous ovarian cancers. How FGF1 promotes escape to chemotherapy remains unknown. In previous studies, we showed that FGF1 inhibits p53 transcriptional activities, leading to increased cell survival of neuronal or fibroblast cell lines. In this study, we show that FGF1 favors survival of COV434 cells upon treatment with etoposide and cisplatin, two common chemotherapeutic molecules used for ovarian cancer. Etoposide and cisplatin induced mitochondrial depolarization, cytochrome c release and caspase activation in COV434 cells. Overexpression of FGF1 counteracts these events and thus allows increased survival of ovarian cells. In this study, FGF1 had little effect on p53 stability and transcriptional activities. Etoposide induced p21 expression as expected, but p21 protein levels were even increased in the presence of FGF1. Using RNA interference, we showed that p21 exerts an anti-apoptotic activity in COV434 cells. However abrogating this activity was not sufficient to restore cell death of FGF1-overexpressing cells. We also show for the first time that p53 mitochondrial pathway is involved in the cell death of COV434 cells. Indeed, p53 accumulates at mitochondria upon etoposide treatment and inhibition of p53 mitochondrial localization using pifithrin-µ inhibits apoptosis of COV434 cells. FGF1 also decreases mitochondrial accumulation of p53 induced by etoposide. This constitutes a novel mechanism of action for FGF1 to promote cell survival in response to chemotherapy.
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8
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Pirou C, Montazer-Torbati F, Jah N, Delmas E, Lasbleiz C, Mignotte B, Renaud F. FGF1 protects neuroblastoma SH-SY5Y cells from p53-dependent apoptosis through an intracrine pathway regulated by FGF1 phosphorylation. Cell Death Dis 2017; 8:e3023. [PMID: 29048426 PMCID: PMC5596585 DOI: 10.1038/cddis.2017.404] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 07/11/2017] [Accepted: 07/12/2017] [Indexed: 02/06/2023]
Abstract
Neuroblastoma, a sympathetic nervous system tumor, accounts for 15% of cancer deaths in children. In contrast to most human tumors, p53 is rarely mutated in human primary neuroblastoma, suggesting impaired p53 activation in neuroblastoma. Various studies have shown correlations between fgf1 expression levels and both prognosis severity and tumor chemoresistance. As we previously showed that fibroblast growth factor 1 (FGF1) inhibited p53-dependent apoptosis in neuron-like PC12 cells, we initiated the study of the interaction between the FGF1 and p53 pathways in neuroblastoma. We focused on the activity of either extracellular FGF1 by adding recombinant rFGF1 in media, or of intracellular FGF1 by overexpression in human SH-SY5Y and mouse N2a neuroblastoma cell lines. In both cell lines, the genotoxic drug etoposide induced a classical mitochondrial p53-dependent apoptosis. FGF1 was able to inhibit p53-dependent apoptosis upstream of mitochondrial events in SH-SY5Y cells by both extracellular and intracellular pathways. Both rFGF1 addition and etoposide treatment increased fgf1 expression in SH-SY5Y cells. Conversely, rFGF1 or overexpressed FGF1 had no effect on p53-dependent apoptosis and fgf1 expression in neuroblastoma N2a cells. Using different FGF1 mutants (that is, FGF1K132E, FGF1S130A and FGF1S130D), we further showed that the C-terminal domain and phosphorylation of FGF1 regulate its intracrine anti-apoptotic activity in neuroblastoma SH-SY5Y cells. This study provides the first evidence for a role of an intracrine growth factor pathway on p53-dependent apoptosis in neuroblastoma, and could lead to the identification of key regulators involved in neuroblastoma tumor progression and chemoresistance.
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Affiliation(s)
- Caroline Pirou
- Laboratoire de Génétique et Biologie Cellulaire, EA4589, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Université Paris-Saclay, École Pratique des Hautes Etudes (EPHE), PSL Research University, 2 Avenue de la Source de la Bièvre, Montigny-Le-Bretonneux 78180, France
| | - Fatemeh Montazer-Torbati
- Laboratoire de Génétique et Biologie Cellulaire, EA4589, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Université Paris-Saclay, École Pratique des Hautes Etudes (EPHE), PSL Research University, 2 Avenue de la Source de la Bièvre, Montigny-Le-Bretonneux 78180, France
| | - Nadège Jah
- Laboratoire de Génétique et Biologie Cellulaire, EA4589, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Université Paris-Saclay, École Pratique des Hautes Etudes (EPHE), PSL Research University, 2 Avenue de la Source de la Bièvre, Montigny-Le-Bretonneux 78180, France
| | - Elisabeth Delmas
- Laboratoire de Génétique et Biologie Cellulaire, EA4589, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Université Paris-Saclay, École Pratique des Hautes Etudes (EPHE), PSL Research University, 2 Avenue de la Source de la Bièvre, Montigny-Le-Bretonneux 78180, France
| | - Christelle Lasbleiz
- Laboratoire de Génétique et Biologie Cellulaire, EA4589, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Université Paris-Saclay, École Pratique des Hautes Etudes (EPHE), PSL Research University, 2 Avenue de la Source de la Bièvre, Montigny-Le-Bretonneux 78180, France
| | - Bernard Mignotte
- Laboratoire de Génétique et Biologie Cellulaire, EA4589, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Université Paris-Saclay, École Pratique des Hautes Etudes (EPHE), PSL Research University, 2 Avenue de la Source de la Bièvre, Montigny-Le-Bretonneux 78180, France
| | - Flore Renaud
- Laboratoire de Génétique et Biologie Cellulaire, EA4589, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Université Paris-Saclay, École Pratique des Hautes Etudes (EPHE), PSL Research University, 2 Avenue de la Source de la Bièvre, Montigny-Le-Bretonneux 78180, France
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9
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FGF1 C-terminal domain and phosphorylation regulate intracrine FGF1 signaling for its neurotrophic and anti-apoptotic activities. Cell Death Dis 2016; 7:e2079. [PMID: 26844696 PMCID: PMC4849156 DOI: 10.1038/cddis.2016.2] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 12/17/2015] [Accepted: 12/23/2015] [Indexed: 11/09/2022]
Abstract
Fibroblast growth factor 1 (FGF1) is a prototypic member of the FGFs family overexpressed in various tumors. Contrarily to most FGFs, FGF1 lacks a secretion peptide signal and acts mainly in an intracellular and nuclear manner. Intracellular FGF1 induces cell proliferation, differentiation and survival. We previously showed that intracellular FGF1 induces neuronal differentiation and inhibits both p53- and serum-free-medium-induced apoptosis in PC12 cells. FGF1 nuclear localization is required for these intracellular activities, suggesting that FGF1 regulates p53-dependent apoptosis and neuronal differentiation by new nuclear pathways. To better characterize intracellular FGF1 pathways, we studied the effect of three mutations localized in the C-terminal domain of FGF1 (i.e., FGF1K132E, FGF1S130A and FGF1S130D) on FGF1 neurotrophic and anti-apoptotic activities in PC12 cells. The change of the serine 130 to alanine precludes FGF1 phosphorylation, while its mutation to aspartic acid mimics phosphorylation. These FGF1 mutants kept both a nuclear and cytosolic localization in PC12 cells. Our study highlights for the first time the role of FGF1 phosphorylation and the implication of FGF1 C-terminal domain on its intracellular activities. Indeed, we show that the K132E mutation inhibits both the neurotrophic and anti-apoptotic activities of FGF1, suggesting a regulatory activity for FGF1 C terminus. Furthermore, we observed that both FGF1S130A and FGF1S130D mutant forms induced PC12 cells neuronal differentiation. Therefore, FGF1 phosphorylation does not regulate FGF1-induced differentiation of PC12 cells. Then, we showed that only FGF1S130A protects PC12 cells against p53-dependent apoptosis, thus phosphorylation appears to inhibit FGF1 anti-apoptotic activity in PC12 cells. Altogether, our results show that phosphorylation does not regulate FGF1 neurotrophic activity but inhibits its anti-apoptotic activity after p53-dependent apoptosis induction, giving new insight into the poorly described FGF1 intracrine/nuclear pathway. The study of nuclear pathways could be crucial to identify key regulators involved in neuronal differentiation, tumor progression and resistances to radio- and chemo-therapy.
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10
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Bober J, Olsnes S, Kostas M, Bogacz M, Zakrzewska M, Otlewski J. Identification of new FGF1 binding partners-Implications for its intracellular function. IUBMB Life 2016; 68:242-51. [PMID: 26840910 PMCID: PMC4832500 DOI: 10.1002/iub.1480] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 01/07/2016] [Indexed: 11/30/2022]
Abstract
Besides its classical mode of action through activation of specific receptors at the cell surface, fibroblast growth factor 1 (FGF1) can also cross the cellular membrane and translocate into the cytosol and further to the nucleus. The mechanism of this translocation is described partially, but the role of FGF1 inside the cell remains unknown. The aim of our work was to identify novel binding partners of FGF1 to predict its intracellular functions. We combined three methods of identification of such partners based on different principles: yeast two‐hybrid screen and mass spectrometry (MS) analysis of complexes obtained by Tandem Affinity Purification (TAP) or by co‐precipitation from cell lysate using recombinant FGF1. Altogether, we identified twenty novel intracellular proteins interacting with FGF1. For selected proteins, their direct interaction with FGF1 was confirmed by pull‐down assays and SPR measurements. Interestingly, half of the proteins found are involved in processes related to cell viability, such as apoptosis, cell proliferation, and cell cycle regulation. Thus, our study indicates that the role of intracellular FGF1 is to protect the cell against stress conditions by providing an additional signal for cell survival, independently of receptor‐activated signaling cascades. © 2016 IUBMB Life, 68(3):242–251, 2016
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Affiliation(s)
- Joanna Bober
- Faculty of Biotechnology, Department of Protein Engineering, University of Wroclaw, Wroclaw, Poland
| | - Sjur Olsnes
- Department of Biochemistry, Institute for Cancer Research, Oslo University Hospital, Montebello, Oslo, Norway
| | - Michal Kostas
- Faculty of Biotechnology, Department of Protein Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - Marek Bogacz
- Faculty of Biotechnology, Department of Protein Engineering, University of Wroclaw, Wroclaw, Poland
| | - Malgorzata Zakrzewska
- Faculty of Biotechnology, Department of Protein Engineering, University of Wroclaw, Wroclaw, Poland
| | - Jacek Otlewski
- Faculty of Biotechnology, Department of Protein Engineering, University of Wroclaw, Wroclaw, Poland
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11
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Liu Z, Liu H, Jiang J, Tan S, Yang Y, Zhan Y, Wu B. PDGF-BB and bFGF ameliorate radiation-induced intestinal progenitor/stem cell apoptosis via Akt/p53 signaling in mice. Am J Physiol Gastrointest Liver Physiol 2014; 307:G1033-43. [PMID: 25301184 DOI: 10.1152/ajpgi.00151.2014] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Radiation-induced gastrointestinal (GI) syndrome currently has no effective prophylactic or therapeutic treatment. Previous studies and our data have demonstrated the important role of p53 in acute radiation-induced GI syndrome in mice. Many cytokines, such as tumor necrosis factor-α and fibroblast growth factor (bFGF), have been found to protect against radiation-induced intestinal injury, although the underlying mechanisms remain to be identified. Here, we report blockage of p53 through a protein kinase B (Akt) pathway in intestinal progenitor/stem cells or crypt cells as a novel molecular mechanism of growth factor-mediated intestinal radioprotection. Treatment with platelet-derived growth factor (PDGF-BB) or bFGF activated Akt phosphorylation in the intestinal crypt, lessened intestinal crypt p53 expression, decreased radiation-induced apoptosis in mouse intestinal progenitor/stem cell marker leucine-rich repeat-containing G protein-coupled receptor 5 (Lgr5)-positive cells by an average of 50%, and increased the survival rate of mice with abdominal radiation by 3 days in average. Conversely, the Akt inhibitor perifosine obstructed growth factor-simulated Akt phosphorylation while promoting radiation-induced p53 expression in intestinal crypts. Importantly, reduced Akt phosphorylation and elevated p53 expression due to the Akt inhibitor perifosine impaired intestinal progenitor/stem cells radioprotection provided by PDGF-BB and bFGF. Consistently, PDGF-BB and bFGF both upregulated Akt activation, suppressed radiation-induced p53 expression, and abrogated radiation-induced apoptosis in IEC-6 cells, although p53 overexpression in IEC-6 cells partially counteracted the radioprotection of PDGF-BB and bFGF. Our data suggest that intestinal crypt radioprotection by PDGF-BB and bFGF is dependent on regulation of Akt/p53 signaling.
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Affiliation(s)
- Zhihao Liu
- Department of Gastroenterology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Huiling Liu
- Department of Gastroenterology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jie Jiang
- Department of Gastroenterology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Siwei Tan
- Department of Gastroenterology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yidong Yang
- Department of Gastroenterology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yashi Zhan
- Department of Gastroenterology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Bin Wu
- Department of Gastroenterology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
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12
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Panni S, Salvioli S, Santonico E, Langone F, Storino F, Altilia S, Franceschi C, Cesareni G, Castagnoli L. The adapter protein CD2AP binds to p53 protein in the cytoplasm and can discriminate its polymorphic variants P72R. J Biochem 2014; 157:101-11. [PMID: 25261582 DOI: 10.1093/jb/mvu059] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Proline-rich motifs are widely distributed in eukaryotic proteomes and are usually involved in the assembly of functional complexes through interaction with specific binding modules. The tumour-suppressor p53 protein presents a proline-rich region that is crucial for regulating apoptosis by connecting the p53 with a complex protein network. In humans, a common polymorphism determines the identity of residue 72, either proline or arginine, and affects the features of the motifs present in the polyproline domain. The two isoforms have different biochemical properties and markedly influence cancer onset and progression. In this article, we analyse the binding of the p53 proline-rich region with a pool of selected polyproline binding domains (i.e. SH3 and WW), and we present the first demonstration that the purified SH3 domains of the CD2AP/Cin85 protein family are able to directly bind the p53 protein, and to discriminate between the two polymorphic variants P72R.
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Affiliation(s)
- Simona Panni
- Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy
| | - Stefano Salvioli
- Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy
| | - Elena Santonico
- Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy
| | - Francesca Langone
- Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy
| | - Francesca Storino
- Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy
| | - Serena Altilia
- Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy
| | - Claudio Franceschi
- Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy
| | - Gianni Cesareni
- Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy
| | - Luisa Castagnoli
- Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy
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Shi H, Fu C, Wang W, Li Y, Du S, Cao R, Chen J, Sun D, Zhang Z, Wang X, Zhu X. The FGF-1-specific single-chain antibody scFv1C9 effectively inhibits breast cancer tumour growth and metastasis. J Cell Mol Med 2014; 18:2061-70. [PMID: 25124967 PMCID: PMC4244020 DOI: 10.1111/jcmm.12371] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Accepted: 06/16/2014] [Indexed: 11/28/2022] Open
Abstract
Immunotherapy mediated by recombinant antibodies is an effective therapeutic strategy for a variety of cancers. In a previous study, we demonstrated that the fibroblast growth factor 1 (FGF-1)-specific recombinant antibody scFv1C9 arrests the cell cycle at the G0/G1 transition by blocking the intracrine FGF-1 pathway in breast cancer cells. Here, we further show that the overexpression of scFv1C9 in MCF-7 and MDA-MB-231 breast cancer cells by lentiviral infection resulted in decreased tumourigenicity, tumour growth and lung metastasis through FGF-1 neutralization. We found that scFv1C9 resulted in the up-regulation of p21, which in turn inhibited the expression of CDK2 and blocked cell cycle progression. To explore the potential role of scFv1C9 in vivo, we delivered the gene into solid tumours by electroporation, which resulted in significant inhibition of tumour growth. In tumour tissue sections, immunohistochemical staining of the cellular proliferation marker Ki-67 and the microvessel marker CD31 showed a reduction in the proliferative index and microvessel density, respectively, upon expression of scFv1C9 compared with the appropriate controls. Thus, our data indicate a central role for scFv1C9 in blocking the intracrine pathway of FGF-1, therefore, scFv1C9 could be developed in an effective therapeutic for breast cancer.
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Affiliation(s)
- Hengliang Shi
- Key Laboratory of Molecular Epigenetics of the Ministry of Education, Institute of Cytology and Genetics, Northeast Normal University, Changchun, China; Department of Neurosurgery, Affiliated Hospital of Xuzhou Medical College, Xuzhou, China
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Jung EB, Kim YJ, Lee CS. Casein kinase 2 inhibition attenuates cholesterol oxidation product-induced apoptosis by suppressing the activation of the mitochondrial pathway and the caspase-8- and bid-dependent pathways. Neurochem Int 2014; 65:30-9. [PMID: 24398405 DOI: 10.1016/j.neuint.2013.12.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 11/21/2013] [Accepted: 12/29/2013] [Indexed: 11/25/2022]
Abstract
Protein casein kinase 2 is involved in signal transduction, cell growth and apoptosis. However, it is unclear whether the cholesterol oxidation product-induced cell death is regulated by casein kinase 2. Therefore, in the respect of the cell death process, we assessed the regulatory effect of the casein kinase 2 on the cholesterol oxidation product-induced apoptosis in neuronal cells using differentiated PC12 cells. Casein kinase 2 inhibitors (4,5,6,7-tetrabromobezotriazole (TBB) and apigenin) which do not have toxic effects, reduced the 7-ketocholesterol or 25-hydroxycholesterol-induced cell death and nuclear damage in PC12 cells. Treatment with TBB inhibited the 7-ketocholesterol-induced decrease in Bid, Bcl-2 and survivin protein levels, increase in Bax levels, loss of the mitochondrial transmembrane potential, cytochrome c release, activation of caspases (-8, -9 and -3), cleavage of PARP-1, and increase in the tumor suppressor p53 levels. The results showed that the casein kinase 2 inhibitor at the concentrations tested which does not induce toxic effects, may attenuate the cholesterol oxidation product-induced apoptosis in differentiated PC12 cells by suppressing the activation of the mitochondrial pathway and the caspase-8- and Bid-dependent pathways. The preventive effect appears to be ascribed to its inhibitory effect on the formation of reactive oxygen species and depletion of GSH.
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Affiliation(s)
- Eun Byul Jung
- Department of Pharmacology, College of Medicine, and the BK21(plus) Skin Barrier Network Human Resources Development Team, Chung-Ang University, Seoul 156-756, South Korea
| | - Yun Jeong Kim
- Department of Pharmacology, College of Medicine, and the BK21(plus) Skin Barrier Network Human Resources Development Team, Chung-Ang University, Seoul 156-756, South Korea
| | - Chung Soo Lee
- Department of Pharmacology, College of Medicine, and the BK21(plus) Skin Barrier Network Human Resources Development Team, Chung-Ang University, Seoul 156-756, South Korea.
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15
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Jamaludin NS, Goh ZJ, Cheah YK, Ang KP, Sim JH, Khoo CH, Fairuz ZA, Halim SNBA, Ng SW, Seng HL, Tiekink ERT. Phosphanegold(I) dithiocarbamates, R3PAu[SC(=S)N((i)Pr)CH2CH2OH] for R = Ph, Cy and Et: role of phosphane-bound R substituents upon in vitro cytotoxicity against MCF-7R breast cancer cells and cell death pathways. Eur J Med Chem 2013; 67:127-41. [PMID: 23856069 DOI: 10.1016/j.ejmech.2013.06.038] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 06/11/2013] [Accepted: 06/13/2013] [Indexed: 12/23/2022]
Abstract
The synthesis and characterisation of R3PAu[S2CN((i)Pr)CH2CH2OH], for R = Ph (1), Cy (2) and Et (3)4, is reported. Compounds 1-3 are cytotoxic against the doxorubicin-resistant breast cancer cell line, MCF-7R, with 1 exhibiting greater potency and cytotoxicity than either of doxorubicin and cisplatin. Based on human apoptosis PCR-array analysis, caspase activities, DNA fragmentation, cell apoptotic assays, intracellular reactive oxygen species (ROS) measurements and human topoisomerase I inhibition, induction of apoptosis by 1, and necrosis by 2 and 3, are demonstrated, by both extrinsic and intrinsic pathways. Compound 1 activates the p53 gene, 2 activates only the p73 gene, whereas 3 activates both the p53 and p73 genes. Compounds 1 and 3 activate NF-κB, and each inhibits topoisomerase I.
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The influence of R substituents in triphenylphosphinegold(I) carbonimidothioates, Ph3PAu[SC(OR)=NPh] (R=Me, Et and iPr), upon in vitro cytotoxicity against the HT-29 colon cancer cell line and upon apoptotic pathways. J Inorg Biochem 2013; 127:24-38. [PMID: 23850666 DOI: 10.1016/j.jinorgbio.2013.05.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Revised: 05/23/2013] [Accepted: 05/23/2013] [Indexed: 11/20/2022]
Abstract
The Ph3PAu[SC(OR)=NPh], R=Me (1), Et (2) and iPr (3), compounds are significantly cytotoxic to the HT-29 cancer cell line with 1 being the most active. Based on human apoptosis PCR-array analysis, caspase activities, DNA fragmentation, cell apoptotic assays, intracellular reactive oxygen species (ROS) measurements and human topoisomerase I inhibition, induction of apoptosis is demonstrated and both the extrinsic and intrinsic pathways of apoptosis have been shown to occur. Compound 1 activates the p73 gene, whereas each of 2 and 3 activates the p53 gene. An additional apoptotic mechanism is exhibited by 2, that is, via the JNK/MAP pathway.
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Abstract
The current status of peptides that target the mitochondria in the context of cancer is the focus of this review. Chemotherapy and radiotherapy used to kill tumor cells are principally mediated by the process of apoptosis that is governed by the mitochondria. The failure of anticancer therapy often resides at the level of the mitochondria. Therefore, the mitochondrion is a key pharmacological target in cancer due to many of the differences that arise between malignant and healthy cells at the level of this ubiquitous organelle. Additionally, targeting the characteristics of malignant mitochondira often rely on disruption of protein--protein interactions that are not generally amenable to small molecules. We discuss anticancer peptides that intersect with pathological changes in the mitochondrion.
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Rodríguez-Enfedaque A, Delmas E, Guillaume A, Gaumer S, Mignotte B, Vayssière JL, Renaud F. zVAD-fmk upregulates caspase-9 cleavage and activity in etoposide-induced cell death of mouse embryonic fibroblasts. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2012; 1823:1343-52. [DOI: 10.1016/j.bbamcr.2012.05.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2011] [Revised: 05/04/2012] [Accepted: 05/10/2012] [Indexed: 11/17/2022]
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19
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Zeni O, Sannino A, Sarti M, Romeo S, Massa R, Scarfì MR. Radiofrequency radiation at 1950 MHz (UMTS) does not affect key cellular endpoints in neuron-like PC12 cells. Bioelectromagnetics 2012; 33:497-507. [PMID: 22354756 DOI: 10.1002/bem.21712] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2011] [Accepted: 01/25/2012] [Indexed: 11/07/2022]
Abstract
In this study, rat pheochromocytoma (PC12) cells were exposed, as a model of neuron-like cells, to 1950 MHz radiofrequency (RF) radiation with a signal used by the 3G wireless technology of the Universal Mobile Telecommunications System (UMTS) to assess possible adverse effects. RF exposure for 24 h at a specific absorption rate (SAR) of 10 W/kg was carried out in a waveguide system under accurately controlled environmental and dosimetric parameters. DNA integrity, cell viability, and apoptosis were investigated as cellular endpoints relevant for carcinogenesis and other diseases of the central nervous system. Very sensitive biological assays were employed to assess the effects immediately after RF exposure and 24 h later, as demonstrated by the cellular response elicited in PC12 cells using positive control treatments provided for each assay. In our experimental conditions, 24 h of RF exposure at a carrier frequency and modulation scheme typical of a UMTS signal was not able to elicit any effect in the selected cellular endpoints in undifferentiated PC12 cells, despite the application of a higher SAR value than those applied in the majority of the studies reported in the literature.
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Affiliation(s)
- Olga Zeni
- ICEmB at CNR-Institute for Electromagnetic Sensing of Environment, Naples, Italy.
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Bensassi F, Gallerne C, dein OSE, Hajlaoui MR, Bacha H, Lemaire C. Mechanism of Alternariol monomethyl ether-induced mitochondrial apoptosis in human colon carcinoma cells. Toxicology 2011; 290:230-40. [DOI: 10.1016/j.tox.2011.09.087] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2011] [Revised: 09/28/2011] [Accepted: 09/30/2011] [Indexed: 10/16/2022]
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Le Floch N, Rincheval V, Ferecatu I, Ali-Boina R, Renaud F, Mignotte B, Vayssière JL. The p76(Rb) and p100(Rb) truncated forms of the Rb protein exert antagonistic roles on cell death regulation in human cell lines. Biochem Biophys Res Commun 2010; 399:173-8. [PMID: 20638363 DOI: 10.1016/j.bbrc.2010.07.041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2010] [Accepted: 07/13/2010] [Indexed: 11/28/2022]
Abstract
Several caspase-cleaved forms of the retinoblastoma protein have been described. Here, we compared the effect of full-length Rb versus the truncated p76(Rb) and p100(Rb) proteins on cell death regulation in five human cell lines. Interestingly, we observed that p76(Rb) triggers cell death in all tested cell lines and that p100(Rb) protects two cell lines against etoposide or TNF-alpha-induced cell death, whereas full-length Rb has no apoptotic effect. These results show that truncated forms of Rb can have specific activities in the regulation of cell death. They also suggest that caspase cleavage of Rb should not be simply assimilated to a degradation process. Finally, we show that cell death induced by p76(Rb) is Bax-dependent and is diminished by Bcl-2 overexpression or by caspase inhibition and that p100(Rb) could inhibit cell death by decreasing both p53 stability and caspase activity.
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Affiliation(s)
- Nathalie Le Floch
- Université de Versailles/St Quentin-en-Yvelines, CNRS FRE3216, Laboratoire de génétique et biologie cellulaire/Ecole Pratique des Hautes Etudes, Laboratoire de génétique moléculaire et physiologique, 45 avenue des Etats-Unis, 78035 Versailles cedex, France
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Growth factors protect intestinal stem cells from radiation-induced apoptosis by suppressing PUMA through the PI3K/AKT/p53 axis. Oncogene 2009; 29:1622-32. [PMID: 19966853 PMCID: PMC3076086 DOI: 10.1038/onc.2009.451] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Gastrointestinal toxicity is the primary limiting factor in abdominal and pelvic radiotherapy, but has no effective treatment currently. We recently showed a critical role of the BH3-only protein p53 upregulated modulator of apoptosis (PUMA) in acute radiation-induced GI damage and GI syndrome in mice. Growth factors such as insulin-like growth factor 1 (IGF-1) and basic fibroblast growth factor (bFGF) have been shown to protect against radiation-induced intestinal injury, although the underlying mechanisms remain to be identified. We report here the suppression of PUMA through the phosphoinositide 3-kinase (PI3K)/protein kinase B (AKT)/p53 axis in the intestinal stem cells as a novel molecular mechanism of growth factor-mediated intestinal radioprotection. IGF-1 or bFGF impaired radiation-induced apoptosis and the expression of PUMA and p53 in the crypt cells and intestinal stem cells. Using colonic epithelial cells that undergo PUMA-dependent and radiation-induced apoptosis, we found that a PI3K inhibitor, dominant-negative PI3K or Mdm2 antagonist restored the induction of PUMA, p53 and apoptosis in the presence of growth factors. In contrast, overexpression of AKT suppressed the induction of PUMA and p53 by radiation. Furthermore, inhibiting PI3K or activating p53 abrogated growth factor-mediated suppression of apoptosis and PUMA expression in the intestinal crypts and stem cells after radiation.
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FGF1 nuclear translocation is required for both its neurotrophic activity and its p53-dependent apoptosis protection. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2009; 1793:1719-27. [DOI: 10.1016/j.bbamcr.2009.09.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2009] [Revised: 09/04/2009] [Accepted: 09/10/2009] [Indexed: 12/29/2022]
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Ferecatu I, Bergeaud M, Rodríguez-Enfedaque A, Le Floch N, Oliver L, Rincheval V, Renaud F, Vallette FM, Mignotte B, Vayssière JL. Mitochondrial localization of the low level p53 protein in proliferative cells. Biochem Biophys Res Commun 2009; 387:772-7. [DOI: 10.1016/j.bbrc.2009.07.111] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2009] [Accepted: 07/22/2009] [Indexed: 11/30/2022]
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El Golli Bennour E, Rodriguez-Enfedaque A, Bouaziz C, Ladjimi M, Renaud F, Bacha H. Toxicities induced in cultured human hepatocarcinoma cells exposed to ochratoxin A: oxidative stress and apoptosis status. J Biochem Mol Toxicol 2009; 23:87-96. [PMID: 19367635 DOI: 10.1002/jbt.20268] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Ochratoxin A (OTA) is a mycotoxin currently detected in stored animal and human food supplies as well as in human sera worldwide. OTA has diverse toxicological effects; however, the most prominent one is the nephrotoxicity. The present investigation was conducted to determine the molecular aspects of OTA toxicity in cultured human hepatocellular carcinoma cells. With this aim, we have monitored the effects of OTA on (i) cell viability, (ii) heat shock protein expressions as a parameter of protective and adaptive response, (iii) oxidative damage, and (iv) cell death signaling pathway. Our results clearly showed that OTA treatment inhibits cell proliferation, downregulates Hsp 70 and Hsp 27 protein and mRNA levels, and did not induce a significant reactive oxygen species generation. We have also demonstrated a decrease in mitochondrial membrane potential, a cytochrome c release, and an activation of caspase 9 and caspase 3 in response to OTA exposure. Moreover, OTA activates p53 expression, while some of its transcriptional target genes (Bax, Bak, PUMA, and p21) were found to downregulate. According to these data, we concluded that OTA may exert an inhibitory action on the transcriptional process. Besides, oxidative damage is not a major contributor to OTA toxicity. This mycotoxin induces a mitochondrial and caspase-dependent apoptotic cell death, which seems to be mediated by p53 transcriptional independent activities.
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Affiliation(s)
- Emna El Golli Bennour
- Laboratory of Research on Biologically Compatible Compounds, Faculty of Dentistry, Rue Avicenne, Monastir, 5000, Tunisia
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Ferecatu I, Le Floch N, Bergeaud M, Rodríguez-Enfedaque A, Rincheval V, Oliver L, Vallette FM, Mignotte B, Vayssière JL. Evidence for a mitochondrial localization of the retinoblastoma protein. BMC Cell Biol 2009; 10:50. [PMID: 19555499 PMCID: PMC2711044 DOI: 10.1186/1471-2121-10-50] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2008] [Accepted: 06/25/2009] [Indexed: 11/10/2022] Open
Abstract
Background The retinoblastoma protein (Rb) plays a central role in the regulation of cell cycle, differentiation and apoptosis. In cancer cells, ablation of Rb function or its pathway is a consequence of genetic inactivation, viral oncoprotein binding or deregulated hyperphosphorylation. Some recent data suggest that Rb relocation could also account for the regulation of its tumor suppressor activity, as is the case for other tumor suppressor proteins, such as p53. Results In this reported study, we present evidence that a fraction of the total amount of Rb protein can localize to the mitochondria in proliferative cells taken from both rodent and human cells. This result is also supported by the use of Rb siRNAs, which substantially reduced the amount of mitochondrial Rb, and by acellular assays, in which [35S]-Methionine-labeled Rb proteins bind strongly to mitochondria isolated from rat liver. Moreover, endogenous Rb is found in an internal compartment of the mitochondria, within the inner-membrane. This is consistent with the protection of Rb from alkaline treatment, which destroys any interaction of proteins that are weakly bound to mitochondria. Conclusion Although a few data regarding an unspecific cytosolic localization of Rb protein have been reported for some tumor cells, our results are the first evidence of a mitochondrial localization of Rb. The mitochondrial localization of Rb is observed in parallel with its classic nuclear location and paves the way for the study of potential as-yet-unknown roles of Rb at this site.
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Affiliation(s)
- Ioana Ferecatu
- Laboratoire de génétique et biologie cellulaire - CNRS UMR 8159, Université de Versailles Saint-Quentin-en-Yvelines, Versailles, France.
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Küenzi P, Kiefer S, Koryakina A, Hamburger M. Promotion of cell death or neurite outgrowth in PC-12 and N2a cells by the fungal alkaloid militarinone A depends on basal expression of p53. Apoptosis 2008; 13:364-76. [PMID: 18293087 DOI: 10.1007/s10495-008-0185-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The fungal alkaloid militarinone A (MiliA) was recently found to stimulate neuronal outgrowth in PC-12 cells by persistant activation of pathways that are also involved in NGF-mediated differentiation, namely the PI3-K/PKB and the MEK/ERK pathways. Application of equal concentrations of MiliA to other cells such as the murine neuroblastoma cell line N2a resulted in immediate onset of apoptosis by nuclear translocation of apoptosis inducing factor (AIF), activation of caspases and c-Jun/AP-1 transcription factor without an intermediate differentiated phenotype, although minor transient phosphorylation of PKB and MAPK as well as activation of NF-kappaB were also observed. Translocation of AIF was preceded by p53 phosphorylation at Ser15 and blocked by pifithrin alpha, a known inhibitor of p53-transcriptional activity. We here show that both cell types activate the same pathways albeit in different time scales. This is mainly due to contrasting basal expression levels of p53, which in turn regulates expression of AIF. In PC-12 cells, continuous activation of these pathways after prolonged treatment with 40 muM MiliA first led to up-regulation of p53, phosphorylation of p53, release of AIF from mitochondria and its translocation into the nucleus. Additionally, also activation of the c-Jun/AP-1 transcription factor was observed, and PC-12 cells subsequently underwent apoptosis 48-72 h post-treatment. We report that similar pathways working on different levels are able to initially shape very divergent cellular responses.
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Affiliation(s)
- Peter Küenzi
- Institute of Pharmaceutical Biology, University of Basel, Klingelbergstrasse 50, CH-4056, Basel, Switzerland
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