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Telpoukhovskaia M, Hadad N, Gurdon B, Dai M, Ouellette AR, Neuner S, Dunn AR, Hansen SL, Wu Y, Dumitrescu L, O'Connell KMS, Dammer EB, Seyfried NT, Muzumdar S, Gillis J, Robson P, Zhang J, Hohman TJ, Philip VM, Menon V, Kaczorowski CC. Conserved cell‐type specific signature of resilience to Alzheimer’s disease nominates role for excitatory cortical neurons. Alzheimers Dement 2022. [DOI: 10.1002/alz.069370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
| | | | - Brianna Gurdon
- The Jackson Laboratory Bar Harbor ME USA
- The University of Maine Orono ME USA
| | - Miko Dai
- The Jackson Laboratory Bar Harbor ME USA
| | - Andrew R Ouellette
- The Jackson Laboratory Bar Harbor ME USA
- University of Maine Graduate School of Biomedical Science and Engineering Orono ME USA
| | - Sarah Neuner
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai New York NY USA
| | - Amy R Dunn
- The Jackson Laboratory Bar Harbor ME USA
| | | | - Yiyang Wu
- Vanderbilt Memory and Alzheimer’s Center Nashville TN USA
| | - Logan Dumitrescu
- Vanderbilt Memory and Alzheimer’s Center, Vanderbilt University Medical Center Nashville TN USA
| | | | | | | | | | | | - Paul Robson
- The Jackson Laboratory for Genomic Medicine Farmington CT USA
| | | | - Timothy J. Hohman
- Vanderbilt Memory & Alzheimer’s Center, Vanderbilt University Medical Center Nashville TN USA
- Department of Neurology, Vanderbilt University Medical Center Nashville TN USA
| | | | - Vilas Menon
- Columbia University Irving Medical Center New York NY USA
| | - Catherine C. Kaczorowski
- The Jackson Laboratory Bar Harbor ME USA
- The University of Maine Orono ME USA
- Tufts University School of Medicine Boston MA USA
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Ghouri A, Muzumdar S, Barr AJ, Robinson E, Murdoch C, Kingsbury SR, Conaghan PG. The relationship between meniscal pathologies, cartilage loss, joint replacement and pain in knee osteoarthritis: a systematic review. Osteoarthritis Cartilage 2022; 30:1287-1327. [PMID: 35963512 DOI: 10.1016/j.joca.2022.08.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 08/01/2022] [Accepted: 08/01/2022] [Indexed: 02/02/2023]
Abstract
OBJECTIVE We conducted a systematic review in order to understand the relationship between imaging-visualised meniscus pathologies, hyaline cartilage, joint replacement and pain in knee osteoarthritis (OA). DESIGN A search of the Medline, Excerpta Medica database (EMBASE) and Cochrane library databases was performed for original publications reporting association between imaging-detected meniscal pathology (extrusion or tear/damage) and longitudinal and cross-sectional assessments of hyaline articular cartilage loss [assessed on magnetic resonance imaging (MRI)], incident joint replacement and pain (longitudinal and cross-sectional) in knee OA. Each association was qualitatively characterised by a synthesis of data from each analysis, based upon study design and quality scoring (including risk of bias assessment and adequacy of covariate adjustment using Cochrane recommended methodology). RESULTS In total 4,878 abstracts were screened and 82 publications were included (comprising 72 longitudinal analyses and 49 cross-sectional). Using high quality, well-adjusted data, meniscal extrusion and meniscal tear/damage were associated with longitudinal progression of cartilage loss, cross-sectional cartilage loss severity and joint replacement, independently of age, sex and body mass index (BMI). Medial and lateral meniscal tears were associated with cartilage loss when they occurred in the body and posterior horns, but not the anterior horns. There was a lack of high quality, well-adjusted meniscal pathology and pain publications and no clear independent association between meniscal extrusion or tear/damage with pain severity, progression in pain or incident frequent knee symptoms. CONCLUSION Meniscal features have strong associations with cartilage loss and joint replacement in knee OA, but weak associations with knee pain. Systematic review PROSPERO registration number: CRD 42020210910.
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Affiliation(s)
- A Ghouri
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds and NIHR Leeds Musculoskeletal Biomedical Research Unit, Leeds, UK.
| | | | - A J Barr
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds and NIHR Leeds Musculoskeletal Biomedical Research Unit, Leeds, UK.
| | - E Robinson
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds and NIHR Leeds Musculoskeletal Biomedical Research Unit, Leeds, UK.
| | - C Murdoch
- Calderdale and Huddersfield NHS Foundation Trust, UK.
| | - S R Kingsbury
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds and NIHR Leeds Musculoskeletal Biomedical Research Unit, Leeds, UK.
| | - P G Conaghan
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds and NIHR Leeds Musculoskeletal Biomedical Research Unit, Leeds, UK.
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Muzumdar S, Ballouz S, Lam F, Degrange M, Kreuzburg S, Chong H, Zerbe C, Jongco A, Gillis J. A granular view of X-linked chronic granulomatous disease exploiting single-cell transcriptomics. The Journal of Immunology 2022. [DOI: 10.4049/jimmunol.208.supp.159.04] [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] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Abstract
X-linked chronic granulomatous disease (X-CGD) is a rare monogenetic immunodeficiency primarily affecting phagocytes. Precipitated by mutations in the CYBB gene, patients exhibit a compromised oxidative burst, leading to recurrent infections which can be life-threatening. Curiously, autoimmune manifestations are also common in patients and carriers. Here, exploiting the cell type-specific nature of this disorder, we characterize X-CGD on a transcriptional level using single-cell sequencing. Peripheral blood from 14 X-CGD probands and 10 carriers signed onto IRB approved protocol NCT00404560, as well as from 15 controls was sampled, and PBMCs and isolated monocytes were subjected to single-cell sequencing. Probands exhibited a strong differential expression signal relative to controls. This was composed of not only genes previously described to be up-regulated in X-CGD such as IFI27, and indeed an autoimmunity-associated broader type I interferon response, but also previously undescribed genes involved in monocyte function (ARG1), antimicrobial proteins (CAMP, SLPI), and inflammasome components (AIM2). Surprisingly, expression variability was not greater in carriers relative to probands or controls, indicating a lack of cell autonomous effects from the deletion of CYBB. Interestingly, aggregate expression of differentially expressed genes in the probands was able to classify carriers from sex-matched controls with high accuracy (AUROC = 0.92), indicating the presence of an X-CGD-specific gene signature. This gene signature was also strongly co-expressed across 17 chordate species, pointing towards the disruption of ancestral pathways important in antimicrobial immunity in X-CGD probands and carriers.
This work was partially supported by a Swiss National Science Foundation fellowship to S.M.
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Affiliation(s)
| | - Sara Ballouz
- 2Garvan Inst. of Med. Res., Australia, Australia
| | - Fung Lam
- 3Feinstein Inst. for Med. Res., Northwell Hlth
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Muzumdar S, Koch M, Hiebert H, Bapst A, Gravina A, Bloch W, Beer HD, Werner S, Schäfer M. Genetic activation of Nrf2 reduces cutaneous symptoms in a murine model of Netherton syndrome. Dis Model Mech 2020; 13:dmm042648. [PMID: 32457102 PMCID: PMC7286291 DOI: 10.1242/dmm.042648] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 03/16/2020] [Indexed: 01/08/2023] Open
Abstract
Netherton syndrome is a monogenic autosomal recessive disorder primarily characterized by the detachment of the uppermost layer of the epidermis, the stratum corneum It results from mutations in the SPINK5 gene, which codes for a kallikrein inhibitor. Uncontrolled kallikrein activity leads to premature desquamation, resulting in a severe epidermal barrier defect and subsequent life-threatening systemic infections and chronic cutaneous inflammation. Here, we show that genetic activation of the transcription factor nuclear factor (erythroid-derived 2)-like 2 (Nfe2l2/Nrf2) in keratinocytes of Spink5 knockout mice, a model for Netherton syndrome, significantly alleviates their cutaneous phenotype. Nrf2 activation promoted attachment of the stratum corneum and concomitant epidermal barrier function, and reduced the expression of pro-inflammatory cytokines such as tumor necrosis factor α and thymic stromal lymphopoietin. Mechanistically, we show that Nrf2 activation induces overexpression of secretory leukocyte protease inhibitor (Slpi), a known inhibitor of kallikrein 7 and elastase 2, in mouse and human keratinocytes in vivo and in vitro, respectively. In the Spink5-deficient epidermis, the upregulation of Slpi is likely to promote stabilization of corneodesmosomes, thereby preventing premature desquamation. Our results suggest pharmacological NRF2 activation as a promising treatment modality for Netherton syndrome patients.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Sukalp Muzumdar
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Michael Koch
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Hayley Hiebert
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Andreas Bapst
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Alessia Gravina
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Wilhelm Bloch
- Department of Molecular and Cellular Sport Medicine, German Sport University Cologne, 50933 Cologne, Germany
| | - Hans-Dietmar Beer
- Department of Dermatology, University Hospital of Zurich, Gloriastrasse 3, 8091 Zurich, Switzerland
| | - Sabine Werner
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Matthias Schäfer
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, 8093 Zurich, Switzerland
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Siegenthaler B, Defila C, Muzumdar S, Beer HD, Meyer M, Tanner S, Bloch W, Blank V, Schäfer M, Werner S. Correction to: Nrf3 promotes UV-induced keratinocyte apoptosis through suppression of cell adhesion. Cell Death Differ 2019; 27:402. [PMID: 31641240 PMCID: PMC7205871 DOI: 10.1038/s41418-019-0437-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Beat Siegenthaler
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, 8093, Switzerland
| | - Claudia Defila
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, 8093, Switzerland
| | - Sukalp Muzumdar
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, 8093, Switzerland
| | - Hans-Dietmar Beer
- Department of Dermatology, University Hospital Zurich, Zurich, CH-8091, Switzerland
| | - Michael Meyer
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, 8093, Switzerland
| | - Sandra Tanner
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, 8093, Switzerland
| | - Wilhelm Bloch
- Department of Molecular and Cellular Sport Medicine, German Sport University Cologne, Cologne, 50933, Germany
| | - Volker Blank
- Lady Davis Institute for Medical Research, McGill University, Montreal, Canada
| | - Matthias Schäfer
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, 8093, Switzerland
| | - Sabine Werner
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, 8093, Switzerland.
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Muzumdar S, Hiebert H, Haertel E, Ben-Yehuda Greenwald M, Bloch W, Werner S, Schäfer M. Nrf2-Mediated Expansion of Pilosebaceous Cells Accelerates Cutaneous Wound Healing. Am J Pathol 2018; 189:568-579. [PMID: 30593821 DOI: 10.1016/j.ajpath.2018.11.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 10/14/2018] [Accepted: 11/19/2018] [Indexed: 12/15/2022]
Abstract
The nuclear factor (erythroid-derived 2)-like 2 (Nrf2) transcription factor is a key regulator of the cellular stress response. Therefore, pharmacologic Nrf2 activation is a promising strategy for skin protection and cancer prevention. This study found that genetic Nrf2 activation in keratinocytes accelerates wound repair. Enhanced proliferation of cells of the pilosebaceous unit peripheral to the wound and a concomitant acceleration of re-epithelialization were identified as the underlying mechanism. Nrf2 specifically promoted the expansion of pilosebaceous cells expressing markers of junctional zone and upper isthmus follicular stem cells. This may result, at least in part, from the up-regulation of the direct Nrf2 target epigen and a concomitant increase in epidermal growth factor receptor signaling. The increase in pilosebaceous cells provided a larger pool of keratinocytes that migrate into the wound, resulting in faster wound closure. These results unravel a novel function of Nrf2 in wound repair and suggest the use of NRF2-activating compounds in patients with impaired healing.
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Affiliation(s)
- Sukalp Muzumdar
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Hayley Hiebert
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Eric Haertel
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | | | - Wilhelm Bloch
- Department of Molecular and Cellular Sport Medicine, German Sport University Cologne, Cologne, Germany
| | - Sabine Werner
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Matthias Schäfer
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland.
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Muzumdar S, Hiebert H, Haertel E, Bloch W, Werner S, Schäfer M. 1312 Nrf2 activation enhances the healing of cutaneous wounds through the activation of hair follicle stem cells. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.1329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Dube B, Bowes MA, Kingsbury SR, Hensor EMA, Muzumdar S, Conaghan PG. Where does meniscal damage progress most rapidly? An analysis using three-dimensional shape models on data from the Osteoarthritis Initiative. Osteoarthritis Cartilage 2018; 26:62-71. [PMID: 29054695 DOI: 10.1016/j.joca.2017.10.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 08/31/2017] [Accepted: 10/11/2017] [Indexed: 02/02/2023]
Abstract
OBJECTIVES Meniscal pathology is integral to knee osteoarthritis (OA) and its progression; it provides a progression biomarker and a potential treatment target. Magnetic resonance imaging (MRI) demonstrates large heterogeneity in meniscal damage; this structural complexity means measurement is difficult. The aim of this study was to apply novel 3D image analysis to determine which meniscal pathologies demonstrated most change during OA progression. METHODS Knee images were selected from the progression cohort of the Osteoarthritis Initiative choosing participants with risk factors for medial OA progression. Medial and lateral menisci were manually segmented then analysed using a statistical shape model of the tibia as a reference surface. Responsiveness was assessed at 1 year using standardised response means (SRMs) for four constructs: meniscal volume, extrusion volume, thickness and tibial coverage; anatomical sub-regions of these constructs were also explored. RESULTS Paired images from 86 participants (median age 61.5, 49% female, 56% obese) were included. Reliability of the novel meniscal measurements was very good intraclass correlation coefficients (ICCs all > 0.98). Meniscal volume and extrusion demonstrated no significant change. Moderate responsiveness was observed for medial meniscus thickness (SRM -0.35) and medial tibial coverage (SRM -0.36). No substantial change was seen for the lateral meniscus measures. Sub-region analysis did not improve responsiveness; while greater change was seen in the posterior medial compartment, it was associated with increased variance of the change. CONCLUSIONS The location of meniscal damage was consistently in the posterior medial region, and two measurements (thickness and tibial coverage) were most responsive. Meniscal measures should add to discriminatory power in OA progression assessment.
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Affiliation(s)
- B Dube
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds and NIHR Leeds Biomedical Research Centre, Leeds, UK
| | - M A Bowes
- Imorphics Ltd, Kilburn House, Manchester, UK
| | - S R Kingsbury
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds and NIHR Leeds Biomedical Research Centre, Leeds, UK
| | - E M A Hensor
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds and NIHR Leeds Biomedical Research Centre, Leeds, UK
| | - S Muzumdar
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds and NIHR Leeds Biomedical Research Centre, Leeds, UK
| | - P G Conaghan
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds and NIHR Leeds Biomedical Research Centre, Leeds, UK.
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Bachofner M, Speicher T, Bogorad RL, Muzumdar S, Derrer CP, Hürlimann F, Böhm F, Nanni P, Kockmann T, Kachaylo E, Meyer M, Padrissa-Altés S, Graf R, Anderson DG, Koteliansky V, Auf dem Keller U, Werner S. Large-Scale Quantitative Proteomics Identifies the Ubiquitin Ligase Nedd4-1 as an Essential Regulator of Liver Regeneration. Dev Cell 2017; 42:616-625.e8. [PMID: 28890072 DOI: 10.1016/j.devcel.2017.07.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 04/16/2017] [Accepted: 07/26/2017] [Indexed: 01/20/2023]
Abstract
The liver is the only organ in mammals that fully regenerates even after major injury. To identify orchestrators of this regenerative response, we performed quantitative large-scale proteomics analysis of cytoplasmic and nuclear fractions from normal versus regenerating mouse liver. Proteins of the ubiquitin-proteasome pathway were rapidly upregulated after two-third hepatectomy, with the ubiquitin ligase Nedd4-1 being a top hit. In vivo knockdown of Nedd4-1 in hepatocytes through nanoparticle-mediated delivery of small interfering RNA caused severe liver damage and inhibition of cell proliferation after hepatectomy, resulting in liver failure. Mechanistically, we demonstrate that Nedd4-1 is required for efficient internalization of major growth factor receptors involved in liver regeneration and their downstream mitogenic signaling. These results highlight the power of large-scale proteomics to identify key players in liver regeneration and the importance of posttranslational regulation of growth factor signaling in this process. Finally, they identify an essential function of Nedd4-1 in tissue repair.
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Affiliation(s)
- Marc Bachofner
- Department of Biology, Institute of Molecular Health Sciences, ETH Zürich, 8093 Zürich, Switzerland
| | - Tobias Speicher
- Department of Biology, Institute of Molecular Health Sciences, ETH Zürich, 8093 Zürich, Switzerland
| | - Roman L Bogorad
- David H. Koch Institute for Integrative Cancer Research, Department of Chemical Engineering, Division of Health Science Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Sukalp Muzumdar
- Department of Biology, Institute of Molecular Health Sciences, ETH Zürich, 8093 Zürich, Switzerland
| | - Carina P Derrer
- Department of Biology, Institute of Molecular Health Sciences, ETH Zürich, 8093 Zürich, Switzerland
| | - Fabrizio Hürlimann
- Department of Biology, Institute of Molecular Health Sciences, ETH Zürich, 8093 Zürich, Switzerland
| | - Friederike Böhm
- Department of Biology, Institute of Molecular Health Sciences, ETH Zürich, 8093 Zürich, Switzerland
| | - Paolo Nanni
- Functional Genomics Center Zürich, University of Zürich/ETH Zürich, 8057 Zürich, Switzerland
| | - Tobias Kockmann
- Department of Biology, Institute of Molecular Health Sciences, ETH Zürich, 8093 Zürich, Switzerland; Functional Genomics Center Zürich, University of Zürich/ETH Zürich, 8057 Zürich, Switzerland
| | - Ekaterina Kachaylo
- Swiss HPB Center, Division of Visceral and Transplantation Surgery, University Hospital Zürich, 8091 Zürich, Switzerland
| | - Michael Meyer
- Department of Biology, Institute of Molecular Health Sciences, ETH Zürich, 8093 Zürich, Switzerland
| | - Susagna Padrissa-Altés
- Department of Biology, Institute of Molecular Health Sciences, ETH Zürich, 8093 Zürich, Switzerland
| | - Rolf Graf
- Swiss HPB Center, Division of Visceral and Transplantation Surgery, University Hospital Zürich, 8091 Zürich, Switzerland
| | - Daniel G Anderson
- David H. Koch Institute for Integrative Cancer Research, Department of Chemical Engineering, Division of Health Science Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Division of Health Science Technology, Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Victor Koteliansky
- Skolkovo Institute of Science and Technology, ul. Novaya, d.100, Skolkovo 143025, Russian Federation
| | - Ulrich Auf dem Keller
- Department of Biology, Institute of Molecular Health Sciences, ETH Zürich, 8093 Zürich, Switzerland.
| | - Sabine Werner
- Department of Biology, Institute of Molecular Health Sciences, ETH Zürich, 8093 Zürich, Switzerland.
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Dahlhoff M, Muzumdar S, Schäfer M, Schneider MR. ERBB2 Is Essential for the Growth of Chemically Induced Skin Tumors in Mice. J Invest Dermatol 2016; 137:921-930. [PMID: 27931797 DOI: 10.1016/j.jid.2016.11.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 10/31/2016] [Accepted: 11/08/2016] [Indexed: 12/23/2022]
Abstract
Although the epidermal growth factor receptor has established roles in skin carcinogenesis, inflammation, and wound healing, the functions of the structurally related receptor ERBB2 in this tissue remain poorly explored. To assess the functions of ERBB2 in skin homeostasis, tumorigenesis, and wound healing, we employed keratin 5-directed, cre recombinase-mediated targeting of Erbb2 alleles in mice. Erbb2del mice, lacking ERBB2 specifically in keratinocytes, showed no noticeable spontaneous skin abnormalities. During early wound healing, the thickness and the number and proliferation rate of keratinocytes in the wound epithelium of Erbb2del mice were significantly reduced. Compared with control littermates, Erbb2del mice remained free of papillomas for a longer time and had significantly reduced tumor burden after application of the 7,12-dimethylbenz[a]anthracene/12-O-tetradecanoylphorbol-13-acetate multistage chemical carcinogenesis protocol. Furthermore, tumor cell proliferation was substantially reduced in Erbb2del mice, and loss of ERBB2 also decreased keratinocyte proliferation after 12-O-tetradecanoylphorbol-13-acetate application. Thus, ERBB2 is dispensable for the development and homeostasis of the epidermis and its appendages. However, reflecting its pro-proliferative role, ERBB2 is required for the normal healing of skin wounds and for the progression of tumors during skin chemical carcinogenesis in mice. Thus, ERBB2 may be a promising target for inhibiting human nonmelanoma skin cancer progression.
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Affiliation(s)
- Maik Dahlhoff
- Institute of Molecular Animal Breeding and Biotechnology, Gene Center, LMU Munich, Munich, Germany
| | - Sukalp Muzumdar
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Matthias Schäfer
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Marlon R Schneider
- Institute of Molecular Animal Breeding and Biotechnology, Gene Center, LMU Munich, Munich, Germany.
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Yazdi AS, Barlin M, Böhm K, Gendrisch F, Ghorbanalipoor S, Häberle S, Hamel A, Hüning S, Hüttner C, Iwanova I, Kanaki T, Kimeswenger S, Lohmann N, Munir S, Muzumdar S, Pereira MP, Peking P, Plesser K, Rendon A, Rentschler M, Schlumprecht C, Smorodchenko A, Stock M, Tillmanns J, Uslu U, Ghoreschi K, Glatz M, Grabbe S, Kunz M, Ludwig R, Scharffetter-Kochanek K, Loser K. ADF Winter School-An exciting concept of the Arbeitsgemeinschaft Dermatologische Forschung to connect young scientists and clinician scientists in Dermatology at the top of Germany. Exp Dermatol 2016; 26:292-294. [PMID: 27808431 DOI: 10.1111/exd.13241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Amir S Yazdi
- Department of Dermatology, University of Tübingen, Tübingen, Germany.,CRC/TRR156 University of Heidelberg, Tübingen and Mainz, Germany
| | - Meltem Barlin
- Department of Dermatology, University of Cologne, Cologne, Germany
| | - Katharina Böhm
- Department of Dermatology, University of Tübingen, Tübingen, Germany
| | - Fabian Gendrisch
- Department of Dermatology, University of Freiburg, Freiburg, Germany
| | | | - Stefanie Häberle
- CRC/TRR156 University of Heidelberg, Tübingen and Mainz, Germany.,Department of Dermatology, University of Heidelberg, Heidelberg, Germany
| | - Annamarie Hamel
- Department of Dermatology, Technical University of Munich, Munich, Germany
| | | | - Clemens Hüttner
- University Hospital of Dermatology, University of Salzburg, Salzburg, Austria
| | - Irina Iwanova
- Department of Dermatology, University of Regensburg, Regensburg, Germany
| | - Theodora Kanaki
- Center for Dermatology and Immunology, Städtisches Klinikum Dessau, Dessau, Germany
| | | | - Nadine Lohmann
- Department of Dermatology, University of Leipzig, Leipzig, Germany
| | - Saira Munir
- Department of Dermatology and Allergic Diseases, University of Ulm, Ulm, Germany
| | - Sukalp Muzumdar
- Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | | | - Patricia Peking
- University Hospital of Dermatology, University of Salzburg, Salzburg, Austria
| | - Kristin Plesser
- Department of Dermatology, University of Düsseldorf, Düsseldorf, Germany
| | - Adriana Rendon
- CRC/TRR156 University of Heidelberg, Tübingen and Mainz, Germany.,Department of Dermatology, University of Heidelberg, Heidelberg, Germany
| | | | | | - Anna Smorodchenko
- Department of Dermatology and Allergy, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Martin Stock
- Department of Dermatology, University of Münster, Münster, Germany
| | - Jessica Tillmanns
- Lübeck Institute of Experimental Dermatology, University of Lübeck, Lübeck, Germany
| | - Ugur Uslu
- Department of Dermatology, University of Erlangen, Erlangen, Germany
| | - Kamran Ghoreschi
- CRC/TRR156 University of Heidelberg, Tübingen and Mainz, Germany.,Department of Dermatology, University of Cologne, Cologne, Germany
| | - Martin Glatz
- Department of Immunology, Universitätsspital Zürich, Zürich, Switzerland
| | - Stephan Grabbe
- CRC/TRR156 University of Heidelberg, Tübingen and Mainz, Germany.,Department of Dermatology, University of Mainz, Mainz, Germany
| | - Manfred Kunz
- Department of Dermatology, University of Leipzig, Leipzig, Germany
| | - Ralf Ludwig
- Lübeck Institute of Experimental Dermatology, University of Lübeck, Lübeck, Germany
| | | | - Karin Loser
- Department of Dermatology, University of Münster, Münster, Germany.,CRC1009 and Cells in Motion - Cluster of Excellence, University of Münster, Münster, Germany
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Kurinna S, Muzumdar S, Köhler UA, Kockmann T, Auf dem Keller U, Schäfer M, Werner S. Autocrine and Paracrine Regulation of Keratinocyte Proliferation through a Novel Nrf2-IL-36γ Pathway. J Immunol 2016; 196:4663-70. [PMID: 27183581 DOI: 10.4049/jimmunol.1501447] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 03/24/2016] [Indexed: 01/17/2023]
Abstract
The Nrf2 transcription factor is well known for its cytoprotective functions through regulation of genes involved in the detoxification of reactive oxygen species or toxic compounds. Therefore, activation of Nrf2 is a promising strategy for the protection of tissues from various types of insults and for cancer prevention. However, recent studies revealed a proinflammatory activity of activated Nrf2 and a stimulating effect on epithelial cell proliferation, but the underlying mechanisms of action and the responsible target genes are largely unknown. Using a combination of gene expression profiling, chromatin immunoprecipitation, and targeted proteomics via selected reaction monitoring, we show that the gene encoding the proinflammatory cytokine IL-36γ is a novel direct target of Nrf2 in keratinocytes and hepatocytes in vitro and in vivo. As a consequence, upregulation of IL-36γ expression occurred upon genetic or pharmacological activation of Nrf2 in the epidermis and in the normal and regenerating liver. Functional in vitro studies demonstrate that IL-36γ directly stimulates proliferation of keratinocytes. In particular, it induces expression of keratinocyte mitogens in fibroblasts, suggesting that the Nrf2-IL-36γ axis promotes keratinocyte proliferation through a double paracrine loop. These results provide mechanistic insight into Nrf2 action in the control of inflammation and cell proliferation through regulation of a proinflammatory cytokine with a key function in various inflammatory diseases.
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Affiliation(s)
- Svitlana Kurinna
- Department of Biology, Institute of Molecular Health Sciences, Swiss Federal Institute of Technology (ETH) Zurich, 8093 Zurich, Switzerland; and
| | - Sukalp Muzumdar
- Department of Biology, Institute of Molecular Health Sciences, Swiss Federal Institute of Technology (ETH) Zurich, 8093 Zurich, Switzerland; and
| | - Ulrike Anne Köhler
- Department of Biology, Institute of Molecular Health Sciences, Swiss Federal Institute of Technology (ETH) Zurich, 8093 Zurich, Switzerland; and
| | - Tobias Kockmann
- Department of Biology, Institute of Molecular Health Sciences, Swiss Federal Institute of Technology (ETH) Zurich, 8093 Zurich, Switzerland; and Functional Genomics Center Zurich, Swiss Federal Institute of Technology (ETH) Zurich/University of Zurich, 8057 Zurich, Switzerland
| | - Ulrich Auf dem Keller
- Department of Biology, Institute of Molecular Health Sciences, Swiss Federal Institute of Technology (ETH) Zurich, 8093 Zurich, Switzerland; and
| | - Matthias Schäfer
- Department of Biology, Institute of Molecular Health Sciences, Swiss Federal Institute of Technology (ETH) Zurich, 8093 Zurich, Switzerland; and
| | - Sabine Werner
- Department of Biology, Institute of Molecular Health Sciences, Swiss Federal Institute of Technology (ETH) Zurich, 8093 Zurich, Switzerland; and
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13
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Rolfs F, Huber M, Kuehne A, Kramer S, Haertel E, Muzumdar S, Wagner J, Tanner Y, Böhm F, Smola S, Zamboni N, Levesque MP, Dummer R, Beer HD, Hohl D, Werner S, Schäfer M. Nrf2 Activation Promotes Keratinocyte Survival during Early Skin Carcinogenesis via Metabolic Alterations. Cancer Res 2015; 75:4817-29. [PMID: 26530903 DOI: 10.1158/0008-5472.can-15-0614] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 08/19/2015] [Indexed: 11/16/2022]
Abstract
Pharmacologic activation of the transcription factor NRF2 has been suggested to offer a strategy for cancer prevention. In this study, we present evidence from murine tumorigenesis experiments suggesting there may be limitations to this possibility, based on tumorigenic effects of Nrf2 in murine keratinocytes that have not been described previously. In this setting, Nrf2 expression conferred metabolic alterations in keratinocytes that were protumorigenic in nature, affecting enzymes involved in glutathione biosynthesis or in the oxidative pentose phosphate pathway and other NADPH-producing enzymes. Under stress conditions, coordinate increases in NADPH, purine, and glutathione levels promoted the survival of keratinocytes harboring oncogenic mutations, thereby promoting tumor development. The protumorigenic activity of Nrf2 in keratinocytes was particularly significant in a mouse model of skin tumorigenesis that did not rely upon chemical carcinogenesis. In exploring the clinical relevance of our findings, we confirm that NRF2 and protumorigenic NRF2 target genes were activated in some actinic keratoses, the major precancerous lesion in human skin. Overall, our results reveal an unexpected tumor-promoting activity of activated NRF2 during early phases of skin tumorigenesis.
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Affiliation(s)
- Frank Rolfs
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Marcel Huber
- Service de Dermatologie et Vénéréologie, Hôpital de Beaumont, Université de Lausanne, Lausanne, Switzerland
| | - Andreas Kuehne
- Department of Biology, Institute for Systems Biology, ETH Zurich, Zurich, Switzerland
| | - Stefan Kramer
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Eric Haertel
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Sukalp Muzumdar
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Johanna Wagner
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Yasmine Tanner
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Friederike Böhm
- Institute of Surgical Pathology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Sigrun Smola
- Institute of Virology, Saarland University, Homburg, Germany
| | - Nicola Zamboni
- Department of Biology, Institute for Systems Biology, ETH Zurich, Zurich, Switzerland
| | - Mitchell P Levesque
- Department of Dermatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Reinhard Dummer
- Department of Dermatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Hans-Dietmar Beer
- Department of Dermatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Daniel Hohl
- Service de Dermatologie et Vénéréologie, Hôpital de Beaumont, Université de Lausanne, Lausanne, Switzerland
| | - Sabine Werner
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland.
| | - Matthias Schäfer
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland.
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14
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Dahlhoff M, Schäfer M, Muzumdar S, Rose C, Schneider MR. ERBB3 is required for tumor promotion in a mouse model of skin carcinogenesis. Mol Oncol 2015; 9:1825-33. [PMID: 26194695 DOI: 10.1016/j.molonc.2015.06.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Revised: 05/19/2015] [Accepted: 06/22/2015] [Indexed: 01/24/2023] Open
Abstract
The epidermal growth factor receptor (EGFR) plays a key role in skin inflammation, wound healing, and carcinogenesis. Less is known about the functions of the structurally related receptor ERBB3 (HER3) in the skin. We assessed the requirement of ERBB3 for skin homeostasis, wound healing, and tumorigenesis by crossing mice carrying a conditional Erbb3 allele with animals expressing cre under the control of the keratin 5 promoter. Erbb3(del) mice, lacking ERBB3 specifically in keratinocytes, showed no obvious abnormalities. The EGFR was upregulated in Erbb3(del) skin, possibly compensating the loss of ERBB3. Nonetheless, healing of full-thickness excisional wounds was negatively affected by ERBB3 deficiency. To analyze the function of ERBB3 during tumorigenesis, we employed the established DMBA/TPA multi-stage chemical carcinogenesis protocol. Erbb3(del) mice remained free of papillomas for a longer time and had significantly reduced tumor burden compared to control littermates. Tumor cell proliferation was considerably reduced in Erbb3(del) mice, and loss of ERBB3 also impaired keratinocyte proliferation after a single application of TPA. In human skin tumor samples, upregulated ERBB3 expression was observed in squamous cell carcinoma, condyloma, and malignant melanoma. Thus, we conclude that ERBB3, while dispensable for the development and the homeostasis of the epidermis and its appendages, is required for proper wound healing and for the progression of skin tumors during multi-stage chemical carcinogenesis in mice. ERBB3 may also be important for human skin cancer progression. The latter effects most probably reflect a key role for ERBB3 in increasing cell proliferation after stimuli as wounding or carcinogenesis.
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Affiliation(s)
- Maik Dahlhoff
- Institute of Molecular Animal Breeding and Biotechnology, LMU Munich, Munich, Germany
| | - Matthias Schäfer
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Sukalp Muzumdar
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Christian Rose
- Department of Dermatology, University Hospital Schleswig-Holstein, University of Lübeck, Lübeck, Germany
| | - Marlon R Schneider
- Institute of Molecular Animal Breeding and Biotechnology, LMU Munich, Munich, Germany.
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Ouhtit A, Muzumdar S, Gupta I, Shanmuganathan S, Tamimi Y. Understanding the functional discrepancy of Pim-1 in cancer. Front Biosci (Elite Ed) 2015; 7:208-14. [PMID: 25553374 DOI: 10.2741/e728] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The Pim-1 gene encodes for a proto-oncogenic serine/threonine protein kinase and is generally involved in cytokine signaling as well as in various signaling pathways regulating cell cycle and apoptosis. Pim-1 kinase plays a role in the development of various tumors mainly, prostate cancer, Burkitt's lymphoma, oral cancer and various other hematopoietic lymphomas. This review will focus on the importance and mechanisms of Pim-1 in prostate cancer and the potential clinical relevance of its various inhibitors.
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Affiliation(s)
- Allal Ouhtit
- Department of Genetics, College of Medicine and Health Sciences, Sultan Qaboos University, PO Box 35, PC 123, Al Khoud, Sultanate of Oman
| | - Sukalp Muzumdar
- Department of Genetics, College of Medicine and Health Sciences, Sultan Qaboos University, PO Box 35, PC 123, Al Khoud, Sultanate of Oman
| | - Ishita Gupta
- Department of Genetics, College of Medicine and Health Sciences, Sultan Qaboos University, PO Box 35, PC 123, Al Khoud, Sultanate of Oman
| | - Somya Shanmuganathan
- Department of Genetics, College of Medicine and Health Sciences, Sultan Qaboos University, PO Box 35, PC 123, Al Khoud, Sultanate of Oman
| | - Yahya Tamimi
- Department of Genetics, College of Medicine and Health Sciences, Sultan Qaboos University, PO Box 35, PC 123, Al Khoud, Sultanate of Oman
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16
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Gupta I, Madani S, Abdraboh M, Al RH, Muzumdar S, AbdElmageed Z, Shanmuganathan S, Bhat S, Ramkumar A, Hakkim L, Ouhtit A. Abstract P4-06-16: TGF-β2, A Novel Target of CD44-Promoted Breast Cancer Invasion. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-p4-06-16] [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] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Hyaluronan (HA) mediates communication between cancer cells and the environment via interactions with the cell surface receptor CD44. We have previously shown that CD44-HA interaction in BC cells promotes adhesion to bone marrow endothelial cells. This suggests that HA/CD44 signalling may be correlated with breast cancer (BC) metastasis. The long-term objective of this study is to increase our understanding of the mechanisms by which CD44-HA interaction promotes BC metastasis, and further identify and validate CD44-downstream transcriptional targets for anti-metastatic therapy.
Materials & Methods: Pursuant to this goal, we have developed a tetracycline (tet)-regulated expression of CD44 gene in the BC cell line MCF-7 (B5 clone) and identified TGF-β2 (Transforming Growth Factor beta-2; 3 fold induction) as a potential CD44s-downstream transcriptional target by microarray analysis. To further validate this finding, the same RNA samples, used for microarray analysis and their corresponding protein lysates collected from the BC cell line MCF-7-B5, were examined for CD44 expression in the presence of HA for 18, 24, and 48 hr post-tet withdrawal. Expression of TGF-β2 was examined using RT-PCR and western-Blot analyses.
Results: Our results showed that TGF-β2 mRNA levels were significantly elevated following the removal of tet at 18, 24, and 48 h post-HA stimulation compared to the parental cells. Furthermore, the TGF-β2 precursor protein increased in a time-dependent pattern upon HA-stimulation and in the absence of tet. More interestingly, inhibition of CD44 gene by RNAi method decreased TGF-β2 expression upon HA-stimulation and in the absence of tet.
Conclusion: Our data strongly support the hypothesis that TGF-β2 is a potential target of HA/CD44- downstream-signaling mediating BC cell invasion. Ongoing investigation aims to elucidate the signal transduction pathways coupling CD44 to the regulation of TGF-β2 expression, and further validate CD44/TGF-β2 axes in breast tumor invasion and metastasis.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr P4-06-16.
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Affiliation(s)
- I Gupta
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - S Madani
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - M Abdraboh
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - Riyami H Al
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - S Muzumdar
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - Z AbdElmageed
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - S Shanmuganathan
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - S Bhat
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - A Ramkumar
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - L Hakkim
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - A Ouhtit
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
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17
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Shanmuganathan S, AbdElmageed Z, Fernando A, Gaur R, Ramkumar A, Bhat S, Gupta I, Muzumdar S, Hakkim L, Ouhtit A. Abstract P4-06-14: CD146-suppresses breast tumor invasion via a novel transcription target TIMPv. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-p4-06-14] [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] [Indexed: 11/16/2022]
Abstract
Abstract
The function of the cell adhesion receptor CD146, a recently discovered marker of endothelial cells and a tumor promoter of melanoma and other cancers, is controversial in breast cancer (BC). However several lines of evidence supports its role as a tumor suppressor in BC. Further, the molecular mechanisms underpinning this suppression are unknown, neither has the ligand for CD146 been identified. Using a novel validated Enhanced Green Fluorescent Protein (EGFP)-inducible systems of CD146 expression both in vitro and in vivo, we provide here molecular and functional evidence of CD146 and its novel transcriptional target TIMPv (a variant of tissue inhibitor of metallo-proteinases) in underpinning the suppression of BC invasion.
Tetracycline (tet-on) CD146 system was developed in both MCF-7 and MDA-231 BC founder cell lines, and validated using time course RT-PCR and western blot analyses, and fluorescent microscopy. In functional experiments, induction of CD146 inhibited BC cell migration and invasion. TIMPv, the only endogenous protein inhibitor known for metallocarboxypeptidases, was identified by expression profiling as a novel transcriptional target of CD146-signaling, an association validated by quantitative PCR and immunoblotting experiments in a range of breast and melanoma cancer cells. However, siRNA inhibition of CD146 in the SKMel-28 melanoma cell line increased TIMPv expression, suggesting that while TIMPv is a positive transcriptional target of CD146 in BC cells, it is negatively regulated in melanoma cells. Furthermore, using invasion assay, the functional relevance of TIMPv to CD146-suppressed metastasis was demonstrated by selective suppression of TIMPv in CD146-expressing BC inducible cells using RNAi. More interestingly, induction of CD146 expression in vivo, using the tet-on CD146 expression system in BC Xenograft model resulted in suppression of breast tumor growth. Further, Clinical analysis of breast tissue samples by Immunohistochemistry showed that TIMPv expression patterns paralleled those of CD44s during breast tumor progression. Pharmacological and molecular approaches revealed that the activation of NFκB via Akt pathway couples CD146 to the transcription of TIMPv in BC cells.
Our study is the first report to provide a functional molecular link of a novel transcriptional target of CD146, TIMPv, to cancer via a unique axis that underpin CD146-suppressed BC progression; TIMPv is a potential target for guiding the development of novel therapeutic strategies for BC.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr P4-06-14.
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Affiliation(s)
| | | | - A Fernando
- Sultan Qaboos University, Al-Khod, Seeb, Oman
| | - R Gaur
- Sultan Qaboos University, Al-Khod, Seeb, Oman
| | - A Ramkumar
- Sultan Qaboos University, Al-Khod, Seeb, Oman
| | - S Bhat
- Sultan Qaboos University, Al-Khod, Seeb, Oman
| | - I Gupta
- Sultan Qaboos University, Al-Khod, Seeb, Oman
| | - S Muzumdar
- Sultan Qaboos University, Al-Khod, Seeb, Oman
| | - L Hakkim
- Sultan Qaboos University, Al-Khod, Seeb, Oman
| | - A Ouhtit
- Sultan Qaboos University, Al-Khod, Seeb, Oman
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Sharma S, Manigandan D, Muzumdar S, Subramani V, Sharma D, Julka P, Rath G. SU-E-T-749: Effect of Different Optimization Techniques on Interstitial Breast Brachytherapy. Med Phys 2011. [DOI: 10.1118/1.3612713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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