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Pereira CD, Espadas G, Martins F, Bertrand AT, Servais L, Sabidó E, Chevalier P, da Cruz e Silva OA, Rebelo S. Quantitative proteome analysis of LAP1-deficient human fibroblasts: A pilot approach for predicting the signaling pathways deregulated in LAP1-associated diseases. Biochem Biophys Rep 2024; 39:101757. [PMID: 39035020 PMCID: PMC11260385 DOI: 10.1016/j.bbrep.2024.101757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 06/11/2024] [Accepted: 06/14/2024] [Indexed: 07/23/2024] Open
Abstract
Lamina-associated polypeptide 1 (LAP1), a ubiquitously expressed nuclear envelope protein, appears to be essential for the maintenance of cell homeostasis. Although rare, mutations in the human LAP1-encoding TOR1AIP1 gene cause severe diseases and can culminate in the premature death of affected individuals. Despite there is increasing evidence of the pathogenicity of TOR1AIP1 mutations, the current knowledge on LAP1's physiological roles in humans is limited; hence, investigation is required to elucidate the critical functions of this protein, which can be achieved by uncovering the molecular consequences of LAP1 depletion, a topic that remains largely unexplored. In this work, the proteome of patient-derived LAP1-deficient fibroblasts carrying a pathological TOR1AIP1 mutation (LAP1 E482A) was quantitatively analyzed to identify global changes in protein abundance levels relatively to control fibroblasts. An in silico functional enrichment analysis of the mass spectrometry-identified differentially expressed proteins was also performed, along with additional in vitro functional assays, to unveil the biological processes that are potentially dysfunctional in LAP1 E482A fibroblasts. Collectively, our findings suggest that LAP1 deficiency may induce significant alterations in various cellular activities, including DNA repair, messenger RNA degradation/translation, proteostasis and glutathione metabolism/antioxidant response. This study sheds light on possible new functions of human LAP1 and could set the basis for subsequent in-depth mechanistic investigations. Moreover, by identifying deregulated signaling pathways in LAP1-deficient cells, our work may offer valuable molecular targets for future disease-modifying therapies for TOR1AIP1-associated nuclear envelopathies.
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Affiliation(s)
- Cátia D. Pereira
- Institute of Biomedicine (iBiMED), Department of Medical Sciences, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Guadalupe Espadas
- Center for Genomics Regulation, The Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
- Universitat Pompeu Fabra, Barcelona, Spain
| | - Filipa Martins
- Institute of Biomedicine (iBiMED), Department of Medical Sciences, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Anne T. Bertrand
- Sorbonne Université, Inserm, Institut de Myologie, Centre de Recherche en Myologie, Paris, France
| | - Laurent Servais
- MDUK Oxford Neuromuscular Center, Department of Paediatrics, University of Oxford and NIHR Oxford Biomedical Research Center, Oxford, OX3 9DU, United Kingdom
- Neuromuscular Center, Division of Paediatrics, University Hospital of Liège and University of Liège, 4000, Liège, Belgium
| | - Eduard Sabidó
- Center for Genomics Regulation, The Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
- Universitat Pompeu Fabra, Barcelona, Spain
| | - Philippe Chevalier
- Université Claude Bernard Lyon 1, Lyon, France
- Hospices Civils de Lyon, Lyon, France
| | - Odete A.B. da Cruz e Silva
- Institute of Biomedicine (iBiMED), Department of Medical Sciences, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Sandra Rebelo
- Institute of Biomedicine (iBiMED), Department of Medical Sciences, University of Aveiro, 3810-193, Aveiro, Portugal
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Moosavi-Movahedi F, Saboury AA, Ghasemi A, Pirhaghi M, Mamashli F, Mohammad-Zaheri M, Arghavani P, Yousefi R, Moosavi-Movahedi AA. Exploring the significance of potassium homeostasis in copper ion binding to human αB-Crystallin. Int J Biol Macromol 2024; 263:130261. [PMID: 38368978 DOI: 10.1016/j.ijbiomac.2024.130261] [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: 11/24/2023] [Revised: 02/11/2024] [Accepted: 02/15/2024] [Indexed: 02/20/2024]
Abstract
αB-Crystallin (αB-Cry) is a small heat shock protein known for its protective role, with an adaptable structure that responds to environmental changes through oligomeric dynamics. Cu(II) ions are crucial for cellular processes but excessive amounts are linked to diseases like cataracts and neurodegeneration. This study investigated how optimal and detrimental Cu(II) concentrations affect αB-Cry oligomers and their chaperone activity, within the potassium-regulated ionic-strength environment. Techniques including isothermal titration calorimetry, differential scanning calorimetry, fluorescence spectroscopy, inductively coupled plasma atomic emission spectroscopy, cyclic voltammetry, dynamic light scattering, circular dichroism, and MTT assay were employed and complemented by computational methods. Results showed that potassium ions affected αB-Cry's structure, promoting Cu(II) binding at multiple sites and scavenging ability, and inhibiting ion redox reactions. Low concentrations of Cu(II), through modifications of oligomeric interfaces, induce regulation of surface charge and hydrophobicity, resulting in an increase in chaperone activity. Subunit dynamics were regulated, maintaining stable interfaces, thereby inhibiting further aggregation and allowing the functional reversion to oligomers after stress. High Cu(II) disrupted charge/hydrophobicity balance, sewing sizable oligomers together through subunit-subunit interactions, suppressing oligomer dissociation, and reducing chaperone efficiency. This study offers insights into how Cu(II) and potassium ions influence αB-Cry, advancing our understanding of Cu(II)-related diseases.
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Affiliation(s)
| | - Ali Akbar Saboury
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran.
| | - Atiyeh Ghasemi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Mitra Pirhaghi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Fatemeh Mamashli
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | | | - Payam Arghavani
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Reza Yousefi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran.
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Szebesczyk A, Słowik J. Heat shock proteins and metal ions - Reaction or interaction? Comput Struct Biotechnol J 2023; 21:3103-3108. [PMID: 37273852 PMCID: PMC10236365 DOI: 10.1016/j.csbj.2023.05.024] [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: 12/04/2022] [Revised: 05/21/2023] [Accepted: 05/23/2023] [Indexed: 06/06/2023] Open
Abstract
Heat shock proteins (HSPs) are part of the cell's molecular chaperone system responsible for the proper folding (or refolding) of proteins. They are expressed in cells of a wide variety of organisms, from bacteria and fungi to humans. While some HSPs require metal ions for proper functioning, others are expressed as a response of the organism to either essential or toxic metal ions. Their presence can influence the occurrence of cellular processes, even those as significant as programmed cell death. The development of research methods and structural modeling has enabled increasingly accurate recognition of new HSP functions, including their role in maintaining metal ion homeostasis. Current investigations on the expression of HSPs in response to heavy metal ions include not only the direct effect of these ions on the cell but also analysis of reactive oxygen species (ROS) and the increased production of HSPs with increasing ROS concentration. This minireview contains information about the direct and indirect interactions of heat shock proteins with metal ions, both those of biological importance and heavy metals.
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Wang Y, Shao W, Feng Y, Tang J, Wang Q, Zhang D, Huang H, Jiang M. Prognostic value and potential biological functions of ferroptosis‑related gene signature in bladder cancer. Oncol Lett 2022; 24:301. [PMID: 35949618 PMCID: PMC9353228 DOI: 10.3892/ol.2022.13421] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 06/14/2022] [Indexed: 11/29/2022] Open
Abstract
Bladder cancer (BC), as a genitourinary system tumor, is a highly prevalent tumor type. Ferroptosis is an iron-dependent oxidative cell death mechanism that is becoming increasingly recognized as a promising avenue for cancer therapy. However, further determination of the prospective prognostic value of ferroptosis for BC and investigation of the underlying mechanisms is required. The mRNA expression profiles and associated clinical data were downloaded from public databases such as The Cancer Genome Atlas, Gene Expression Omnibus and the IMvigor210 database. To construct a predictive formula, the least absolute shrinkage and selection operator Cox regression algorithm was used. In addition, a prognostic multigene signature was constructed using previously selected ferroptosis-related genes (FRGs). A total of 28 FRGs were differentially expressed between tumor and normal samples with |log2 fold change| >1 and adjusted P<0.05. A prognostic model was then established and it was validated in the GEO cohort using six genes: Glutamate-cysteine ligase modifier subunit, crystallin α-B, transferrin receptor, zinc finger E-box binding homeobox 1, squalene epoxidase and glucose-6-phosphate dehydrogenase (G6PD). Numerous important pathways involved in the development of the immune system and cancer were indicated to be significantly different between the two risk groups. In addition, it was discovered that G6PD expression subgroups that were associated with immunotherapy response in patients with BC had similar prognostic features to risk score subgroups. In the present study, a gene signature with a prognostic value for ferroptosis in BC was successfully developed and the potential value of G6PD was identified for future research.
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Affiliation(s)
- Yutong Wang
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Wenchuan Shao
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Yeqi Feng
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Junzhe Tang
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Qinchun Wang
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Dong Zhang
- State Key Lab of Reproductive Medicine, Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Huaxing Huang
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Minjun Jiang
- Department of Urology, Suzhou Ninth People's Hospital, Soochow University, Suzhou, Jiangsu 215299, P.R. China
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Nandi SK, Chakraborty A, Panda AK, Biswas A. M. leprae HSP18 suppresses copper (II) mediated ROS generation: Effect of redox stress on its structure and function. Int J Biol Macromol 2020; 146:648-660. [DOI: 10.1016/j.ijbiomac.2019.12.215] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 11/16/2019] [Accepted: 12/24/2019] [Indexed: 11/25/2022]
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Janowska MK, Baughman HER, Woods CN, Klevit RE. Mechanisms of Small Heat Shock Proteins. Cold Spring Harb Perspect Biol 2019; 11:cshperspect.a034025. [PMID: 30833458 DOI: 10.1101/cshperspect.a034025] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Small heat shock proteins (sHSPs) are ATP-independent chaperones that delay formation of harmful protein aggregates. sHSPs' role in protein homeostasis has been appreciated for decades, but their mechanisms of action remain poorly understood. This gap in understanding is largely a consequence of sHSP properties that make them recalcitrant to detailed study. Multiple stress-associated conditions including pH acidosis, oxidation, and unusual availability of metal ions, as well as reversible stress-induced phosphorylation can modulate sHSP chaperone activity. Investigations of sHSPs reveal that sHSPs can engage in transient or long-lived interactions with client proteins depending on solution conditions and sHSP or client identity. Recent advances in the field highlight both the diversity of function within the sHSP family and the exquisite sensitivity of individual sHSPs to cellular and experimental conditions. Here, we will present and highlight current understanding, recent progress, and future challenges.
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Affiliation(s)
- Maria K Janowska
- Department of Biochemistry, University of Washington, Seattle, Washington 98195
| | - Hannah E R Baughman
- Department of Biochemistry, University of Washington, Seattle, Washington 98195
| | - Christopher N Woods
- Department of Biochemistry, University of Washington, Seattle, Washington 98195
| | - Rachel E Klevit
- Department of Biochemistry, University of Washington, Seattle, Washington 98195
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7
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Stankowska DL, Nam MH, Nahomi RB, Chaphalkar RM, Nandi SK, Fudala R, Krishnamoorthy RR, Nagaraj RH. Systemically administered peptain-1 inhibits retinal ganglion cell death in animal models: implications for neuroprotection in glaucoma. Cell Death Discov 2019; 5:112. [PMID: 31285855 PMCID: PMC6609721 DOI: 10.1038/s41420-019-0194-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 06/13/2019] [Indexed: 12/13/2022] Open
Abstract
Axonal degeneration and death of retinal ganglion cells (RGCs) are the primary causes of vision loss in glaucoma. In this study, we evaluated the efficacy of a peptide (peptain-1) that exhibits robust chaperone and anti-apoptotic activities against RGC loss in two rodent models and in cultured RGCs. In cultures of rat primary RGCs and in rat retinal explants peptain-1 significantly decreased hypoxia-induced RGC loss when compared to a scrambled peptide. Intraperitoneally (i.p.) injected peptain-1 (conjugated to a Cy7 fluorophore) was detected in the retina indicative of its ability to cross the blood-retinal barrier. Peptain-1 treatment inhibited RGC loss in the retina of mice subjected to ischemia/reperfusion (I/R) injury. A reduction in anterograde axonal transport was also ameliorated by peptain-1 treatment in the retina of I/R injured mice. Furthermore, i.p. injections of peptain-1 significantly reduced RGC death and axonal loss and partially restored retinal mitochondrial cytochrome c oxidase subunit 6b2 (COX 6b2) levels in rats subjected to five weeks of elevated intraocular pressure. We conclude that i.p. injected peptain-1 gains access to the retina and protects both RGC somas and axons against the injury caused by I/R and ocular hypertension. Based on these findings, peptain-1 has the potential to be developed as an efficacious neuroprotective agent for the treatment of glaucoma.
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Affiliation(s)
- Dorota L Stankowska
- 1Department of Pharmacology and Neuroscience, North Texas Eye Research Institute, UNT Health Science Center, Fort Worth, TX 76107 USA
| | - Mi-Hyun Nam
- 2Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO 80045 USA
| | - Rooban B Nahomi
- 2Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO 80045 USA
| | - Renuka M Chaphalkar
- 1Department of Pharmacology and Neuroscience, North Texas Eye Research Institute, UNT Health Science Center, Fort Worth, TX 76107 USA
| | - Sandip K Nandi
- 2Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO 80045 USA
| | - Rafal Fudala
- 3Department of Microbiology, Immunology and Genetics, UNT Health Science Center, Fort Worth, TX 76107 USA
| | - Raghu R Krishnamoorthy
- 1Department of Pharmacology and Neuroscience, North Texas Eye Research Institute, UNT Health Science Center, Fort Worth, TX 76107 USA
| | - Ram H Nagaraj
- 2Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO 80045 USA.,4Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Aurora, CO 80045 USA
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8
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Zhang J, Liu J, Wu J, Li W, Chen Z, Yang L. Progression of the role of CRYAB in signaling pathways and cancers. Onco Targets Ther 2019; 12:4129-4139. [PMID: 31239701 PMCID: PMC6553995 DOI: 10.2147/ott.s201799] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 04/07/2019] [Indexed: 01/18/2023] Open
Abstract
CRYAB is a member of the small heat shock protein family, first discovered in the lens of the eye, and involved in various diseases, such as eye and heart diseases and even cancers, for example, breast cancer, lung cancer, prostate cancer, and ovarian cancer. In addition, CRYAB proteins are involved in a variety of signaling pathways including apoptosis, inflammation, and oxidative stress. This review summarizes the recent progress concerning the role of CRYAB in signaling pathways and diseases. Therefore, the role of CRYAB in signaling pathways and cancers is urgently needed. This article reviews the regulation of CRYAB in the apoptotic inflammatory signaling pathway and its role in cancers progression and as a key role in anti-cancer therapy targeting CRYAB in an effort to improve outcomes for patients with metastatic disease.
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Affiliation(s)
- JunFei Zhang
- Department of Emergency Medical, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750000, People's Republic of China
| | - Jia Liu
- Department of Emergency Medical, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750000, People's Republic of China
| | - JiaLi Wu
- Department of Emergency Medical, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750000, People's Republic of China
| | - WenFeng Li
- Department of Emergency Medical, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750000, People's Republic of China
| | - ZhongWei Chen
- Department of Emergency Medical, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750000, People's Republic of China
| | - LiShan Yang
- Department of Emergency Medical, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750000, People's Republic of China
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Finlay TM, Palmer AL, Ousman SS. Murine neutrophils treated with alphaB-crystallin reduce IL-12p40 production by dendritic cells. Immunology 2018. [PMID: 29532462 DOI: 10.1111/imm.12924] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Neutrophils are essential in the fight against invading pathogens. They utilize antimicrobial effector mechanisms, such as phagocytosis, release of proteases and other antimicrobial products, robust oxidative bursts and neutrophil extracellular traps to combat infections. Neutrophils also modulate immune responses through the production of eicosanoids, cytokines and chemokines, as well as via direct communication with other immune cells. This system of high-intensity offense against pathogens is exquisitely balanced through regulation to limit damage to host tissue. Unfortunately, the control of neutrophils is not failproof. In cases of sterile injury, autoimmunity and even during an infection, neutrophils can cause tissue destruction and become detrimental to the host. For that reason, there is a need to find means to regulate the aberrant activation of these cells. We found that alphaB-crystallin (αBC), a heat-shock protein known to have anti-inflammatory abilities, affects certain properties of mouse neutrophils that subsequently influence the pro-inflammatory state of antigen-presenting cells (APCs). More specifically, αBC mediated small but significant increases in the levels of IL-10 and matrix metalloproteinase 8, and altered hydrogen peroxide secretion by stimulated neutrophils. Further, the heat-shock protein influenced the communication between neutrophils and dendritic cells by decreasing the production of pro-inflammatory cytokines, specifically IL-12p40, by the APCs. αBC could thus contribute to dampening neutrophil inflammatory responses by impacting the effect of neutrophils on other immune cells.
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Affiliation(s)
- Trisha M Finlay
- Department of Neuroscience, University of Calgary, Calgary, AB, Canada.,The Hotchkiss Brain Institute, Calgary, AB, Canada
| | - Alexandra L Palmer
- Department of Neuroscience, University of Calgary, Calgary, AB, Canada.,The Hotchkiss Brain Institute, Calgary, AB, Canada
| | - Shalina S Ousman
- The Hotchkiss Brain Institute, Calgary, AB, Canada.,Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada.,Department of Cell Biology & Anatomy, University of Calgary, Calgary, AB, Canada
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Nair RS, Potti ME, Thankappan R, Chandrika SK, Kurup MRP, Srinivas P. Molecular trail for the anticancer behavior of a novel copper carbohydrazone complex in BRCA1 mutated breast cancer. Mol Carcinog 2017; 56:1501-1514. [PMID: 28052399 DOI: 10.1002/mc.22610] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 12/28/2016] [Accepted: 12/31/2016] [Indexed: 01/25/2023]
Abstract
Novel chelated metal complexes were synthesized from carbohydrazones to thiocarbohydrazones using metal-based drug designing platforms and their combination effect with Pb, a naphthaquinone were analyzed for anticancer activity in breast cancer cell lines. A panel of BRCA1 wild-type and mutated breast cancer cells: MCF-7 (BRCA1+ /ER+ ), MDA-MB-231 (BRCA1+ /ERα- ), HCC-1937 (BRCA1- /ERα- ), HCC1937/wt BRCA1, MX1 (BRCA1- /ERα- ), and MDA-MB-436 (BRCA1- /ERα- ) were screened for anti-cancer activity. Cu2 (HL)(HSO4 ) · H2 O]SO4 · 6 H2 O (CS2) is the most potent anticancer agent among the copper carbohydrazone and thiocarbohydrazone complexes analyzed in this study. It can be suggested that the presence of sulphate, as pharmacologically active centre, can induce cytotoxicity more effectively when compared to chlorine, bromine, perchlorate, and methanol. This is the first report demonstrating that CS2 can bind to DNA by hindering BamH1 activity and could induce DNA double strand breaks as evidenced by γ-H2AX expression. In addition to this, CS2 could also act as a Topo II inhibitor at a much lower concentration than etoposide and induce apoptosis, making it a potent anticancer agent. In combination with Pb, a potent ROS inducer, CS2 could induce synergistic anti-cancer activity in HR/ BRCA1 defective breast cancer cells. This is the first study reporting the mechanism involved in the induction of apoptosis for a metal chelated copper carbohydrazone complex and its combination effects with Pb in HR defective, BRCA1 mutated breast cancer cells.
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Affiliation(s)
- Rakesh Sathish Nair
- Cancer Research Program, Rajiv Gandhi Centre for Biotechnology, Thycaud, Thiruvananthapuram, Kerala, India
| | - Manoj Easwaran Potti
- Department of Applied Chemistry, Cochin University of Science and Technology, Kochin, Kerala, India
| | - Ratheeshkumar Thankappan
- Cancer Research Program, Rajiv Gandhi Centre for Biotechnology, Thycaud, Thiruvananthapuram, Kerala, India
| | | | | | - Priya Srinivas
- Cancer Research Program, Rajiv Gandhi Centre for Biotechnology, Thycaud, Thiruvananthapuram, Kerala, India
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11
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Fittipaldi S, Mercatelli N, Dimauro I, Jackson MJ, Paronetto MP, Caporossi D. Alpha B-crystallin induction in skeletal muscle cells under redox imbalance is mediated by a JNK-dependent regulatory mechanism. Free Radic Biol Med 2015; 86:331-42. [PMID: 26066304 DOI: 10.1016/j.freeradbiomed.2015.05.035] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 05/12/2015] [Accepted: 05/30/2015] [Indexed: 11/28/2022]
Abstract
The small heat shock protein α-B-crystallin (CRYAB) is critically involved in stress-related cellular processes such as differentiation, apoptosis, and redox homeostasis. The up-regulation of CRYAB plays a key role in the cytoprotective and antioxidant response, but the molecular pathway driving its expression in muscle cells during oxidative stress still remains unknown. Here we show that noncytotoxic exposure to sodium meta-arsenite (NaAsO2) inducing redox imbalance is able to increase the CRYAB content of C2C12 myoblasts in a transcription-dependent manner. Our in silico analysis revealed a genomic region upstream of the Cryab promoter containing two putative antioxidant-responsive elements motifs and one AP-1-like binding site. The redox-sensitive transcription factors Nrf2 and the AP-1 component c-Jun were found to be up-regulated in NaAsO2-treated cells, and we demonstrated a specific NaAsO2-mediated increase of c-Jun and Nrf2 binding activity to the genomic region identified, supporting their putative involvement in CRYAB regulation following a shift in redox balance. These changes also correlated with a specific phosphorylation of JNK and p38 MAPK kinases, the well-known molecular mediators of signaling pathways leading to the activation of these transcription factors. Pretreatment of C2C12 cells with the JNK inhibitor SP600125 induced a decrease in c-Jun and Nrf2 content and was able to counteract the NaAsO2-mediated increase in CRYAB expression. Thus these data show a direct role of JNK in CRYAB regulation under redox imbalance and also point to a previously unrecognized link between c-Jun and Nrf2 transcription factors and redox-induced CRYAB expression in muscle cells.
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Affiliation(s)
- Simona Fittipaldi
- Unit of Biology, Genetics and Biochemistry, Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", Piazza Lauro De Bosis 15, Rome 00135, Italy
| | - Neri Mercatelli
- Unit of Biology, Genetics and Biochemistry, Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", Piazza Lauro De Bosis 15, Rome 00135, Italy.
| | - Ivan Dimauro
- Unit of Biology, Genetics and Biochemistry, Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", Piazza Lauro De Bosis 15, Rome 00135, Italy
| | - Malcolm J Jackson
- MRC-Arthritis Research UK Centre for Integrated Research into Musculoskeletal Ageing (CIMA), Department of Musculoskeletal Biology Institute of Ageing and Chronic Disease, University of Liverpool, L69 3GA, Liverpool, UK
| | - Maria Paola Paronetto
- Unit of Biology, Genetics and Biochemistry, Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", Piazza Lauro De Bosis 15, Rome 00135, Italy; Laboratory of Molecular and Cellular Neurobiology, CERC Fondazione Santa Lucia, Rome, Italy
| | - Daniela Caporossi
- Unit of Biology, Genetics and Biochemistry, Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", Piazza Lauro De Bosis 15, Rome 00135, Italy
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Bakthisaran R, Tangirala R, Rao CM. Small heat shock proteins: Role in cellular functions and pathology. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2014; 1854:291-319. [PMID: 25556000 DOI: 10.1016/j.bbapap.2014.12.019] [Citation(s) in RCA: 312] [Impact Index Per Article: 31.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2014] [Revised: 12/16/2014] [Accepted: 12/18/2014] [Indexed: 01/18/2023]
Abstract
Small heat shock proteins (sHsps) are conserved across species and are important in stress tolerance. Many sHsps exhibit chaperone-like activity in preventing aggregation of target proteins, keeping them in a folding-competent state and refolding them by themselves or in concert with other ATP-dependent chaperones. Mutations in human sHsps result in myopathies, neuropathies and cataract. Their expression is modulated in diseases such as Alzheimer's, Parkinson's and cancer. Their ability to bind Cu2+, and suppress generation of reactive oxygen species (ROS) may have implications in Cu2+-homeostasis and neurodegenerative diseases. Circulating αB-crystallin and Hsp27 in the plasma may exhibit immunomodulatory and anti-inflammatory functions. αB-crystallin and Hsp20 exhitbit anti-platelet aggregation: these beneficial effects indicate their use as potential therapeutic agents. sHsps have roles in differentiation, proteasomal degradation, autophagy and development. sHsps exhibit a robust anti-apoptotic property, involving several stages of mitochondrial-mediated, extrinsic apoptotic as well as pro-survival pathways. Dynamic N- and C-termini and oligomeric assemblies of αB-crystallin and Hsp27 are important factors for their functions. We propose a "dynamic partitioning hypothesis" for the promiscuous interactions and pleotropic functions exhibited by sHsps. Stress tolerance and anti-apoptotic properties of sHsps have both beneficial and deleterious consequences in human health and diseases. Conditional and targeted modulation of their expression and/or activity could be used as strategies in treating several human disorders. The review attempts to provide a critical overview of sHsps and their divergent roles in cellular processes particularly in the context of human health and disease.
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Affiliation(s)
- Raman Bakthisaran
- CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India
| | - Ramakrishna Tangirala
- CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India
| | - Ch Mohan Rao
- CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India.
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Asthana A, Bollapalli M, Tangirala R, Bakthisaran R, Mohan Rao C. Hsp27 suppresses the Cu(2+)-induced amyloidogenicity, redox activity, and cytotoxicity of α-synuclein by metal ion stripping. Free Radic Biol Med 2014; 72:176-90. [PMID: 24746619 DOI: 10.1016/j.freeradbiomed.2014.04.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 04/03/2014] [Accepted: 04/09/2014] [Indexed: 11/29/2022]
Abstract
Aberrant copper homeostasis and oxidative stress have critical roles in several neurodegenerative diseases. Expression of heat-shock protein 27 (Hsp27) is elevated under oxidative stress as well as upon treatment with Cu(2+), and elevated levels of Hsp27 are found in the brains of patients with Alzheimer and Parkinson diseases. We demonstrate, using steady-state and time-resolved fluorescence spectroscopy as well as isothermal titration calorimetry studies, that Hsp27 binds Cu(2+) with high affinity (Kd ~10(-11) M). Treating IMR-32 human neuroblastoma cells with Cu(2+) leads to upregulation of endogenous Hsp27. Further, overexpression of Hsp27 in IMR-32 human neuroblastoma cells confers cytoprotection against Cu(2+)-induced cell death. Hsp27 prevents the deleterious interaction of Cu(2+) with α-synuclein, the protein involved in Parkinson disease and synucleinopathies. Hsp27 attenuates Cu(2+)- or Cu(2+)-α-synuclein-mediated generation of reactive oxygen species and confers cytoprotection on IMR-32 cells as well as on mouse primary neural precursor cells. Hsp27 prevents Cu(2+)-ascorbate or Cu(2+)-α-synuclein-ascorbate treatment-induced increase in mitochondrial superoxide level and mitochondrial disorganization in IMR-32 cells. Hsp27 dislodges the α-synuclein-bound Cu(2+) and prevents the Cu(2+)-mediated amyloidogenesis of α-synuclein. Our findings that Hsp27 binds Cu(2+) with high affinity leading to beneficial effects and that Hsp27 can dislodge Cu(2+) from α-synuclein, preventing amyloid fibril formation, indicate potential therapeutic strategies for neurodegenerative diseases involving aberrant Cu(2+) homeostasis.
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Affiliation(s)
- Abhishek Asthana
- CSIR-Centre for Cellular and Molecular Biology, Hyderabad 500 007, India
| | - Madhuri Bollapalli
- CSIR-Centre for Cellular and Molecular Biology, Hyderabad 500 007, India
| | | | - Raman Bakthisaran
- CSIR-Centre for Cellular and Molecular Biology, Hyderabad 500 007, India.
| | - Ch Mohan Rao
- CSIR-Centre for Cellular and Molecular Biology, Hyderabad 500 007, India.
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Fittipaldi S, Dimauro I, Mercatelli N, Caporossi D. Role of exercise-induced reactive oxygen species in the modulation of heat shock protein response. Free Radic Res 2013; 48:52-70. [DOI: 10.3109/10715762.2013.835047] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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15
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Shabala L, Walker EJ, Eklund A, Randall-Demllo S, Shabala S, Guven N, Cook AL, Eri RD. Exposure of colonic epithelial cells to oxidative and endoplasmic reticulum stress causes rapid potassium efflux and calcium influx. Cell Biochem Funct 2013; 31:603-11. [PMID: 23280987 DOI: 10.1002/cbf.2946] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Revised: 11/07/2012] [Accepted: 12/05/2012] [Indexed: 11/11/2022]
Abstract
Endoplasmic reticulum (ER) stress and oxidative stress have recently been linked to the pathogenesis of inflammatory bowel diseases. Under physiological conditions, intestinal epithelial cells are exposed to ER and oxidative stress affecting the cellular ionic homeostasis. However, these altered ion flux 'signatures' during these stress conditions are poorly characterized. We investigated the kinetics of K(+) , Ca(2+) and H(+) ion fluxes during ER and oxidative stress in a colonic epithelial cell line LS174T using a non-invasive microelectrode ion flux estimation technique. ER and oxidative stress were induced by cell exposure to tunicamycin (TM) and copper ascorbate (CuAsc), respectively, from 1 to 24 h. Dramatic K(+) efflux was observed following acute ER stress with peak K(+) efflux being -30·6 and -138·7 nmolm(-2) s(-1) for 10 and 50 µg ml(-1) , respectively (p < 0·01). TM-dependent Ca(2+) uptake was more prolonged with peak values of 0·85 and 2·68 nmol m(-2) s(-1) for 10 and 50 µg ml(-1) TM, respectively (p < 0·02). Ion homeostasis was also affected by the duration of ER stress. Increased duration of TM treatment from 0 to 18 h led to increases in both K(+) efflux and Ca(2+) uptake. While K(+) changes were significantly higher at each time point tested, Ca(2+) uptake was significantly higher only after prolonged treatment (18 h). CuAsc also led to an increased K(+) efflux and Ca(2+) uptake. Functional assays to investigate the effect of inhibiting K(+) efflux with tetraethylammonium resulted in increased cell viability. We conclude that ER/oxidative stress in colonic epithelial cells cause dramatic K(+) , Ca(2+) and H(+) ion flux changes, which may predispose this lineage to poor stress recovery reminiscent of that seen in inflammatory bowel diseases.
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Affiliation(s)
- Lana Shabala
- School of Agricultural Sciences, University of Tasmania, Hobart, Tasmania, Australia
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16
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Mainz A, Bardiaux B, Kuppler F, Multhaup G, Felli IC, Pierattelli R, Reif B. Structural and mechanistic implications of metal binding in the small heat-shock protein αB-crystallin. J Biol Chem 2012; 287:1128-38. [PMID: 22090033 PMCID: PMC3256888 DOI: 10.1074/jbc.m111.309047] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Revised: 11/08/2011] [Indexed: 12/20/2022] Open
Abstract
The human small heat-shock protein αB-crystallin (αB) rescues misfolded proteins from irreversible aggregation during cellular stress. Binding of Cu(II) was shown to modulate the oligomeric architecture and the chaperone activity of αB. However, the mechanistic basis of this stimulation is so far not understood. We provide here first structural insights into this Cu(II)-mediated modulation of chaperone function using NMR spectroscopy and other biophysical approaches. We show that the α-crystallin domain is the elementary Cu(II)-binding unit specifically coordinating one Cu(II) ion with picomolar binding affinity. Putative Cu(II) ligands are His(83), His(104), His(111), and Asp(109) at the dimer interface. These loop residues are conserved among different metazoans, but also for human αA-crystallin, HSP20, and HSP27. The involvement of Asp(109) has direct implications for dimer stability, because this residue forms a salt bridge with the disease-related Arg(120) of the neighboring monomer. Furthermore, we observe structural reorganization of strands β2-β3 triggered by Cu(II) binding. This N-terminal region is known to mediate both the intermolecular arrangement in αB oligomers and the binding of client proteins. In the presence of Cu(II), the size and the heterogeneity of αB multimers are increased. At the same time, Cu(II) increases the chaperone activity of αB toward the lens-specific protein β(L)-crystallin. We therefore suggest that Cu(II) binding unblocks potential client binding sites and alters quaternary dynamics of both the dimeric building block as well as the higher order assemblies of αB.
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Affiliation(s)
- Andi Mainz
- From the Leibniz-Institut für Molekulare Pharmakologie (FMP), Robert-Rössle-Strasse 10, Berlin-Buch 13125, Germany
- Helmholtz-Zentrum München, Deutsches Forschungszentrum für Gesundheit und Umwelt, Ingolstädter Landstrasse 1, Neuherberg 85764, Germany
| | - Benjamin Bardiaux
- From the Leibniz-Institut für Molekulare Pharmakologie (FMP), Robert-Rössle-Strasse 10, Berlin-Buch 13125, Germany
| | - Frank Kuppler
- the Institut für Chemie und Biochemie, Freie Universität Berlin, Thielallee 63, Berlin 14195, Germany
| | - Gerd Multhaup
- the Institut für Chemie und Biochemie, Freie Universität Berlin, Thielallee 63, Berlin 14195, Germany
| | - Isabella C. Felli
- the Magnetic Resonance Center and Department of Chemistry, University of Florence, Via L. Sacconi 6, Sesto Fiorentino 50019, Italy, and
| | - Roberta Pierattelli
- the Magnetic Resonance Center and Department of Chemistry, University of Florence, Via L. Sacconi 6, Sesto Fiorentino 50019, Italy, and
| | - Bernd Reif
- From the Leibniz-Institut für Molekulare Pharmakologie (FMP), Robert-Rössle-Strasse 10, Berlin-Buch 13125, Germany
- Helmholtz-Zentrum München, Deutsches Forschungszentrum für Gesundheit und Umwelt, Ingolstädter Landstrasse 1, Neuherberg 85764, Germany
- the Center for Integrated Protein Science Munich, Department of Chemie, Technische Universität München, Lichtenbergstrasse 4, Garching 85747, Germany
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