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Karakaya T, Slaufova M, Di Filippo M, Hennig P, Fenini G, Kündig T, Beer HD. Efficient Generation of CRISPR/Cas9-Mediated Knockout Human Primary Keratinocytes by Electroporation. Methods Mol Biol 2024. [PMID: 38407798 DOI: 10.1007/7651_2024_518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Due to their full differentiation capacity in vitro, the culture of human primary keratinocytes (HPKs) represents a physiological model for answering basic biological and dermatological research questions, including those related to skin diseases and the investigation of treatment options. When modified with the CRISPR/Cas9 gene editing approach and cultivated in organotypic 3D epidermal equivalents (EEs), these human cells have the potential to replace established mouse models. However, even when cultivated on feeder cells, HPKs have only a low proliferation capacity in 2D culture, limiting their application potential. This is particularly true for CRISPR/Cas9-modified HPKs, whose generation commonly requires selection of targeted cells, negatively affecting their lifespan. Here, we describe a robust protocol for the rapid, simple, and efficient generation of single- and multi-gene CRISPR/Cas9 knockout HPKs by electroporation of ribonucleoprotein (RNP) complexes, which comprise one or multiple guide RNAs (gRNAs) and Cas9 protein. Unlike DNA transfection or virus-based targeting strategies, electroporation of RNPs represents a targeting approach that minimizes immunological and toxic side effects. Using efficient gRNAs results in the generation of HPKs with a high yield of knockout cells, allowing for their immediate use in experiments without requiring the laborious process of selecting targeted cells or maintaining a feeder cell culture. Furthermore, the use of RNPs and their delivery via electroporation minimizes off-target and other unspecific effects, preventing unintended genomic alterations. Most importantly, CRISPR/Cas9 knockout HPKs generated with this protocol have the ability to form a fully differentiated epidermis in 3D, thus facilitating the understanding of specific protein functions in a highly physiological human skin model. Alternatively, this approach proves valuable for generating models of mono- or polygenic skin diseases via knockouts, providing insights into the underlying molecular mechanisms and facilitating the development of novel therapeutic approaches.
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Affiliation(s)
- Tugay Karakaya
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
| | - Marta Slaufova
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
| | - Michela Di Filippo
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
| | - Paulina Hennig
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
| | - Gabriele Fenini
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
| | - Thomas Kündig
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
- Faculty of Medicine, University of Zurich, Zurich, Switzerland
| | - Hans-Dietmar Beer
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland.
- Faculty of Medicine, University of Zurich, Zurich, Switzerland.
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Montalto S, Di Filippo M, Capra V, Manzitti C, Sementa AR, De Marco P, Ognibene M, Sertorio F, Sorrentino S. Abdominal rhabdoid tumor presenting with symptomatic spinal epidural compression in a newborn. A case report. Front Pediatr 2024; 11:1337760. [PMID: 38283400 PMCID: PMC10811000 DOI: 10.3389/fped.2023.1337760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 12/28/2023] [Indexed: 01/30/2024] Open
Abstract
The occurrence of an abdominal tumor invading the spinal canal and causing symptoms of epidural compression is rare in an infant, and exceptional at birth. Peripheral neuroblastic tumors are by far the most common cause. Emergency chemotherapy is commonly curative, though permanent sequelae are possible. Although other malignancies may be involved, no case of rhabdoid tumors at birth has been reported. We describe the case of a neonate who presented symptoms of spinal epidural compression at birth secondary to a rhabdoid tumor. As expected with this highly malignant tumor, the patient experienced a rapidly progressive clinical course and died within three months of diagnosis.
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Affiliation(s)
- Shana Montalto
- Pediatric Infectious Diseases Unit, IRCCS IstitutoGianninaGaslini, Genoa, Italy
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, Genoa, Italy
| | - Michela Di Filippo
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, Genoa, Italy
| | - Valeria Capra
- Genomics and Clinical Genetics Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Carla Manzitti
- Oncology Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | | | - Patrizia De Marco
- Medical Genetics Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Marzia Ognibene
- Medical Genetics Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy
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Fontana GA, MacArthur MR, Rotankova N, Di Filippo M, Beer HD, Gahlon HL. The mitochondrial DNA common deletion as a potential biomarker of cancer-associated fibroblasts from skin basal and squamous cell carcinomas. Sci Rep 2024; 14:553. [PMID: 38177205 PMCID: PMC10766618 DOI: 10.1038/s41598-023-50213-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 12/16/2023] [Indexed: 01/06/2024] Open
Abstract
Cancer-associated fibroblasts (CAFs) are components of the tumor microenvironment and represent appealing therapeutic targets for translational studies. Conventional protein-based biomarkers for CAFs have been reported to be limited in their specificity, rendering difficult the identification of CAFs from normal fibroblasts (NFs) in clinical samples and dampening the development of CAF-targeted therapies to treat cancer. In this study, we propose the mitochondrial RNA and the mitochondrial DNA (mtDNA) common deletion (CD) as novel indicators of CAF identity. We found that cancer-activation correlated with decreased levels of the mtDNA CD, a condition not due to altered mitochondria count or cellular redox state, but potentially linked to the generalized overexpression of mtDNA maintenance genes in CAFs. Decreased mtDNA CD content in CAFs was associated with moderate to strong overexpression of mtDNA-encoded genes and to slightly improved mitochondrial function. We identified similar patterns of upregulation of mtDNA-encoded genes in independent single-cell RNA seq data obtained from squamous cell carcinoma (SCC) patients. By using the identified nucleic acids-based indicators, identification of CAFs from NFs could be improved, leading to potential therapeutic benefits in advancing translational and clinical studies.
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Affiliation(s)
- Gabriele A Fontana
- Department of Health Sciences and Technology, ETH Zurich, 8092, Zurich, Switzerland
- Cellvie AG, Technoparkstrasse 1, CH-8005 Zürich, Switzerland
| | - Michael R MacArthur
- Department of Health Sciences and Technology, ETH Zurich, 8092, Zurich, Switzerland
| | - Nadezhda Rotankova
- Department of Health Sciences and Technology, ETH Zurich, 8092, Zurich, Switzerland
| | - Michela Di Filippo
- Department of Dermatology, University Hospital Zurich, 8952, Schlieren, Switzerland
- Faculty of Medicine, University of Zurich, 8032, Zurich, Switzerland
| | - Hans-Dietmar Beer
- Department of Dermatology, University Hospital Zurich, 8952, Schlieren, Switzerland
- Faculty of Medicine, University of Zurich, 8032, Zurich, Switzerland
| | - Hailey L Gahlon
- Department of Health Sciences and Technology, ETH Zurich, 8092, Zurich, Switzerland.
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Slaufova M, Karakaya T, Di Filippo M, Hennig P, Beer HD. The gasdermins: a pore-forming protein family expressed in the epidermis. Front Immunol 2023; 14:1254150. [PMID: 37771587 PMCID: PMC10523161 DOI: 10.3389/fimmu.2023.1254150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 08/24/2023] [Indexed: 09/30/2023] Open
Abstract
Gasdermins comprise a family of pore-forming proteins, which play critical roles in (auto)inflammatory diseases and cancer. They are expressed as self-inhibited precursor proteins consisting of an aminoterminal cytotoxic effector domain (NT-GSDM) and a carboxyterminal inhibitor domain (GSDM-CT) separated by an unstructured linker region. Proteolytic processing in the linker region liberates NT-GSDM, which translocates to membranes, forms oligomers, and induces membrane permeabilization, which can disturb the cellular equilibrium that can lead to cell death. Gasdermin activation and pore formation are associated with inflammation, particularly when induced by the inflammatory protease caspase-1 upon inflammasome activation. These gasdermin pores allow the release of the pro-inflammatory cytokines interleukin(IL)-1β and IL-18 and induce a lytic type of cell death, termed pyroptosis that supports inflammation, immunity, and tissue repair. However, even at the cellular level, the consequences of gasdermin activation are diverse and range from induction of programmed cell death - pyroptosis or apoptosis - to poorly characterized protective mechanisms. The specific effects of gasdermin activation can vary between species, cell types, the membrane that is being permeabilized (plasma membrane, mitochondrial membrane, etc.), and the overall biological state of the local tissue/cells. In epithelia, gasdermins seem to play crucial roles. Keratinocytes represent the main cell type of the epidermis, which is the outermost skin layer with an essential barrier function. Compared to other tissues, keratinocytes express all members of the gasdermin family, in part in a differentiation-specific manner. That raises questions regarding the specific roles of individual GSDM family members in the skin, the mechanisms and consequences of their activation, and the potential crosstalk between them. In this review, we summarize the current knowledge about gasdermins with a focus on keratinocytes and the skin and discuss the possible roles of the different family members in immunity and disease.
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Affiliation(s)
- Marta Slaufova
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
| | - Tugay Karakaya
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
| | - Michela Di Filippo
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
| | - Paulina Hennig
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
| | - Hans-Dietmar Beer
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
- Faculty of Medicine, University of Zurich, Zurich, Switzerland
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Cangkrama M, Liu H, Whipman J, Zubair M, Matsushita M, Di Filippo M, Kopf M, Innocenti M, Werner S. A pro-tumorigenic mDia2-MIRO1 axis controls mitochondrial positioning and function in cancer-associated fibroblasts. Cancer Res 2022; 82:3701-3717. [PMID: 35997559 DOI: 10.1158/0008-5472.can-22-0162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 06/02/2022] [Accepted: 08/09/2022] [Indexed: 11/16/2022]
Abstract
Cancer-associated fibroblasts (CAF) are key regulators of tumorigenesis. Further insights into the tumor promoting mechanisms of action of CAFs could help improve cancer diagnosis and treatment. Here we show that the formin mDia2 regulates the positioning and function of mitochondria in dermal fibroblasts, thereby promoting a pro-tumorigenic CAF phenotype. Mechanistically, mDia2 stabilized the mitochondrial trafficking protein MIRO1. Loss of mDia2 or MIRO1 in fibroblasts or CAFs reduced the presence of mitochondria and ATP levels near the plasma membrane and at CAF-tumor cell contact sites, caused metabolic alterations characteristic of mitochondrial dysfunction, and suppressed the secretion of pro-tumorigenic proteins. In mouse models of squamous carcinogenesis, genetic or pharmacological inhibition of mDia2, MIRO1, or their common upstream regulator activin A inhibited tumor formation. Consistently, co-upregulation of mDia2 and MIRO1 in the stroma of various human cancers negatively correlated with survival. This work unveils a key role of mitochondria in the pro-tumorigenic CAF phenotype and identifies an activin A/mDia2/MIRO1 signaling axis in CAFs with diagnostic and therapeutic potential.
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Abstract
The culture of epidermal human primary keratinocytes (HPKs) represents a well-established model in biological and dermatological research. In addition, HPKs are used in three-dimensional organotypic cultures (OTCs), and gene therapeutic approaches have been reported for the treatment of patients suffering from epidermolysis bullosa, a severe blistering disease that can result in postnatal lethality. Therefore, there is a strong need for the development of techniques for the stable and specific genetic manipulation of HPKs, for example, by genome editing via the CRISPR/Cas9 approach. However, the main disadvantage of working with HPKs is the fact that these cells are prone to terminal differentiation and proliferate only for few passages in monoculture. As it is well known that the co-culture of HPKs with fibroblasts strongly increases the lifetime of the epidermal cells, we developed a protocol for the stable modification of HPKs by CRISPR/Cas9 via lentiviral transduction in the presence of 3T3-J2 fibroblasts as feeder cells. Selection of transduced HPKs is achieved with antibiotics in co-culture with antibiotic-resistant feeder cells. Modified HPKs generated by our protocol have the potential to generate epidermis-like structures in OTCs.
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Affiliation(s)
- Serena Grossi
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
- Faculty of Medicine, University of Zurich, Zurich, Switzerland
| | - Gabriele Fenini
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
- Faculty of Medicine, University of Zurich, Zurich, Switzerland
| | - Paulina Hennig
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
| | - Michela Di Filippo
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
| | - Hans-Dietmar Beer
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland.
- Faculty of Medicine, University of Zurich, Zurich, Switzerland.
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Grossi S, Fenini G, Kockmann T, Hennig P, Di Filippo M, Beer HD. Inactivation of the Cytoprotective Major Vault Protein by Caspase-1 and -9 in Epithelial Cells during Apoptosis. J Invest Dermatol 2019; 140:1335-1345.e10. [PMID: 31877317 DOI: 10.1016/j.jid.2019.11.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 11/07/2019] [Accepted: 11/08/2019] [Indexed: 12/29/2022]
Abstract
Inflammasome activation induces caspase-1-dependent secretion of the proinflammatory cytokine IL-1β. In addition, caspase-1 activates the protein GSDMD in immune cells, causing pyroptosis, a lytic type of cell death. In contrast, UVB irradiation of human primary keratinocytes induces NLRP1 inflammasome activation, cytokine secretion, and caspase-1-dependent apoptosis, rather than pyroptosis. Here, we addressed the molecular mechanisms underlying the role of caspase-1 in UVB-induced cell death of human primary keratinocytes. We show that GSDMD is a poor substrate of caspase-1 in human primary keratinocytes and that its activation upon UVB irradiation supports secretion of IL-1β. We screened for novel substrates of caspase-1 by a mass spectrometry-based approach and identified the specific cleavage of the major vault protein (MVP) at D441 by caspase-1 and -9. MVP is the main component of vaults, highly conserved ribonucleoprotein particles, whose functions are poorly understood. Cleavage of MVP is a common event occurring in human primary keratinocytes and fibroblasts undergoing apoptosis induced by different stimuli. In contrast, MVP cleavage could not be detected in pyroptotic cells. Cleavage of MVP by caspase-1 and -9 inactivates this cytoprotective protein. These results demonstrate a proapoptotic activity of caspase-1 and a crosstalk with caspase-9 upon inactivation of the cytoprotective MVP in apoptotic epithelial cells.
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Affiliation(s)
- Serena Grossi
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Zurich, Switzerland
| | - Gabriele Fenini
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Zurich, Switzerland
| | - Tobias Kockmann
- Functional Genomics Center Zurich, ETH Zurich/University of Zurich, Zurich, Switzerland
| | - Paulina Hennig
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Zurich, Switzerland
| | - Michela Di Filippo
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Zurich, Switzerland
| | - Hans-Dietmar Beer
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Zurich, Switzerland.
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Sand J, Fenini G, Grossi S, Hennig P, Di Filippo M, Levesque M, Werner S, French LE, Beer HD. The NLRP1 Inflammasome Pathway Is Silenced in Cutaneous Squamous Cell Carcinoma. J Invest Dermatol 2019; 139:1788-1797.e6. [PMID: 30738816 DOI: 10.1016/j.jid.2019.01.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 12/18/2018] [Accepted: 01/08/2019] [Indexed: 01/27/2023]
Abstract
The inflammasome protein NLRP1 is an important innate immune sensor in human keratinocytes, and, together with ASC and caspase-1, it mediates the activation and secretion of the proinflammatory cytokines IL-1β and IL-18. These cytokines and inflammasomes can have partly opposing roles during tumorigenesis in mice. In contrast, ASC expression is impaired in different types of cancer in humans. In this study, we analyzed inflammasome activation and expression of inflammasome proteins, including their downstream cytokines, in squamous cell carcinomas, a type of nonmelanoma skin cancer derived from keratinocytes. We assessed mRNA and protein levels in human primary keratinocytes and skin carcinoma-derived SCC cell lines and detected a strong down-regulation of expression of NLRP1 inflammasome components, as well as reduced expression of the proinflammatory cytokines proIL-1β and proIL-1α. Protein levels of NLRP1, ASC, caspase-1, and proIL-1β were reduced in patient-derived SCC biopsy samples compared with healthy skin. Furthermore, the results suggest that expression of PYCARD (ASC), CASP1, IL1B, and NLRP1 is silenced by methylation in SCC cell lines. In conclusion, the down-regulation of the inflammasome pathway in SCCs might favor late tumor development in human skin.
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Affiliation(s)
- Jennifer Sand
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Switzerland
| | - Gabriele Fenini
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Switzerland
| | - Serena Grossi
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Switzerland
| | - Paulina Hennig
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Switzerland
| | - Michela Di Filippo
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Switzerland
| | - Mitchell Levesque
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Switzerland
| | - Sabine Werner
- Institute for Molecular Health Sciences, Department of Biology, ETH Zürich, Zurich, Switzerland
| | - Lars E French
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Switzerland; Department of Dermatology and Allergology, Klinikum der Universität München, Munich, Germany
| | - Hans-Dietmar Beer
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Switzerland.
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Abstract
Aurora kinase A (AURKA) is necessary for proper primary cilium disassembly before mitosis. We found that depletion of caveolin-1 expression promotes primary cilia formation through the proteasomal-dependent degradation of aurora kinase A and induces premature senescence in human fibroblasts. Down-regulation of intraflagellar transport-88, a protein essential for ciliogenesis, inhibits premature senescence induced by the depletion of caveolin-1. In support of these findings, we showed that alisertib, a pharmacological inhibitor of AURKA, causes primary cilia formation and cellular senescence by irreversibly arresting cell growth. Suppression of primary cilia formation limits cellular senescence induced by alisertib. The primary cilium must be disassembled to free its centriole to form the centrosome, a necessary structure for mitotic spindle assembly and cell division. We showed that the use of the centriole to form primary cilia blocks centrosome formation and mitotic spindle assembly and prevents the completion of mitosis in cells in which cellular senescence is caused by the inhibition of AURKA. We also found that AURKA is down-regulated and primary cilia formation is enhanced when cellular senescence is promoted by other senescence-inducing stimuli, such as oxidative stress and UV light. Thus, we propose that impaired AURKA function induces premature senescence by preventing reabsorption of the primary cilium, which inhibits centrosome and mitotic spindle formation and consequently prevents the completion of mitosis. Our study causally links the inability of the cell to disassemble the primary cilium, a microtubule-based cellular organelle, to the development of premature senescence, a functionally and pathologically relevant cellular state.-Jeffries, E. P., Di Filippo, M., Galbiati, F. Failure to reabsorb the primary cilium induces cellular senescence.
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Affiliation(s)
- Elizabeth P Jeffries
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Michela Di Filippo
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Ferruccio Galbiati
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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Hennig P, Garstkiewicz M, Grossi S, Di Filippo M, French LE, Beer HD. The Crosstalk between Nrf2 and Inflammasomes. Int J Mol Sci 2018; 19:ijms19020562. [PMID: 29438305 PMCID: PMC5855784 DOI: 10.3390/ijms19020562] [Citation(s) in RCA: 146] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 02/08/2018] [Accepted: 02/09/2018] [Indexed: 01/03/2023] Open
Abstract
The Nrf2 (nuclear factor E2-related factor or nuclear factor (erythroid-derived 2)-like 2) transcription factor is a key player in cytoprotection and activated in stress conditions caused by reactive oxygen species (ROS) or electrophiles. Inflammasomes represent central regulators of inflammation. Upon detection of various stress factors, assembly of the inflamasome protein complex results in activation and secretion of proinflammatory cytokines. In addition, inflammasome activation causes pyroptosis, a lytic form of cell death, which supports inflammation. There is growing evidence of a crosstalk between the Nrf2 and inflammasome pathways at different levels. For example, Nrf2 activating compounds inhibit inflammasomes and consequently inflammation. This review summarizes what is known about the complex and predominantly antagonistic relationship of both stress-activated pathways.
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Affiliation(s)
- Paulina Hennig
- Department of Dermatology, University Hospital of Zurich, Gloriastrasse 31, F30, CH-8091 Zurich, Switzerland.
| | - Martha Garstkiewicz
- Department of Dermatology, University Hospital of Zurich, Gloriastrasse 31, F30, CH-8091 Zurich, Switzerland.
| | - Serena Grossi
- Department of Dermatology, University Hospital of Zurich, Gloriastrasse 31, F30, CH-8091 Zurich, Switzerland.
| | - Michela Di Filippo
- Department of Dermatology, University Hospital of Zurich, Gloriastrasse 31, F30, CH-8091 Zurich, Switzerland.
| | - Lars E French
- Department of Dermatology, University Hospital of Zurich, Gloriastrasse 31, F30, CH-8091 Zurich, Switzerland.
- Faculty of Medicine, University of Zurich, CH-8091 Zurich, Switzerland.
| | - Hans-Dietmar Beer
- Department of Dermatology, University Hospital of Zurich, Gloriastrasse 31, F30, CH-8091 Zurich, Switzerland.
- Faculty of Medicine, University of Zurich, CH-8091 Zurich, Switzerland.
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