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Korkaya H, Koksalar Alkan F, Caglayan A, Alkan H, Benson E, Gunduz Y, Sensoy O, Durdagi S, Zarbaliyev E, Dyson G, Assad H, Shull A, Chadli A, Shi H, Ozturk G. Dual activity of Minnelide chemosensitize basal/triple negative breast cancer stem cells and reprograms immunosuppressive tumor microenvironment. Res Sq 2024:rs.3.rs-3959342. [PMID: 38464167 PMCID: PMC10925405 DOI: 10.21203/rs.3.rs-3959342/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
Triple negative breast cancer (TNBC) subtype is characterized with higher EMT/stemness properties and immune suppressive tumor microenvironment (TME). Women with advanced TNBC exhibit aggressive disease and have limited treatment options. Although immune suppressive TME is implicated in driving aggressive properties of basal/TNBC subtype and therapy resistance, effectively targeting it remains a challenge. Minnelide, a prodrug of triptolide currently being tested in clinical trials, has shown anti-tumorigenic activity in multiple malignancies via targeting super enhancers, Myc and anti-apoptotic pathways such as HSP70. Distinct super-enhancer landscape drives cancer stem cells (CSC) in TNBC subtype while inducing immune suppressive TME. We show that Minnelide selectively targets CSCs in human and murine TNBC cell lines compared to cell lines of luminal subtype by targeting Myc and HSP70. Minnelide in combination with cyclophosphamide significantly reduces the tumor growth and eliminates metastasis by reprogramming the tumor microenvironment and enhancing cytotoxic T cell infiltration in 4T1 tumor-bearing mice. Resection of residual tumors following the combination treatment leads to complete eradication of disseminated tumor cells as all mice are free of local and distant recurrences. All control mice showed recurrences within 3 weeks of post-resection while single Minnelide treatment delayed recurrence and one mouse was free of tumor. We provide evidence that Minnelide targets tumor intrinsic pathways and reprograms the immune suppressive microenvironment. Our studies also suggest that Minnelide in combination with cyclophosphamide may lead to durable responses in patients with basal/TNBC subtype warranting its clinical investigation.
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Mayer MP, Blair L, Blatch GL, Borges TJ, Chadli A, Chiosis G, de Thonel A, Dinkova-Kostova A, Ecroyd H, Edkins AL, Eguchi T, Fleshner M, Foley KP, Fragkostefanakis S, Gestwicki J, Goloubinoff P, Heritz JA, Heske CM, Hibshman JD, Joutsen J, Li W, Lynes M, Mendillo ML, Mivechi N, Mokoena F, Okusha Y, Prahlad V, Repasky E, Sannino S, Scalia F, Shalgi R, Sistonen L, Sontag E, van Oosten-Hawle P, Vihervaara A, Wickramaratne A, Wang SXY, Zininga T. Stress biology: Complexity and multifariousness in health and disease. Cell Stress Chaperones 2024; 29:143-157. [PMID: 38311120 PMCID: PMC10939078 DOI: 10.1016/j.cstres.2024.01.006] [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] [Indexed: 02/06/2024] Open
Abstract
Preserving and regulating cellular homeostasis in the light of changing environmental conditions or developmental processes is of pivotal importance for single cellular and multicellular organisms alike. To counteract an imbalance in cellular homeostasis transcriptional programs evolved, called the heat shock response, unfolded protein response, and integrated stress response, that act cell-autonomously in most cells but in multicellular organisms are subjected to cell-nonautonomous regulation. These transcriptional programs downregulate the expression of most genes but increase the expression of heat shock genes, including genes encoding molecular chaperones and proteases, proteins involved in the repair of stress-induced damage to macromolecules and cellular structures. Sixty-one years after the discovery of the heat shock response by Ferruccio Ritossa, many aspects of stress biology are still enigmatic. Recent progress in the understanding of stress responses and molecular chaperones was reported at the 12th International Symposium on Heat Shock Proteins in Biology, Medicine and the Environment in the Old Town Alexandria, VA, USA from 28th to 31st of October 2023.
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Affiliation(s)
- Matthias P Mayer
- Center for Molecular Biology of Heidelberg University (ZMBH), DKFZ-ZMBH Alliance, Heidelberg, Germany.
| | - Laura Blair
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
| | - Gregory L Blatch
- Biomedical Research and Drug Discovery Research Group, Faculty of Health Sciences, Higher Colleges of Technology, Sharjah, United Arab Emirates; Biomedical Biotechnology Research Unit, Department of Biochemistry and Microbiology, Rhodes University, Grahamstown, South Africa
| | - Thiago J Borges
- Department of Surgery, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
| | - Ahmed Chadli
- Georgia Cancer Center, Medical College of Georgia at Augusta University, Augusta, GA 30912, USA
| | - Gabriela Chiosis
- Department of Medicine, Division of Solid Tumors, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Aurélie de Thonel
- CNRS, UMR 7216, 75250 Paris Cedex 13, Paris, France; Univeristy of Paris Diderot, Sorbonne Paris Cité, Paris, France; Département Hospitalo-Universitaire DHU PROTECT, Paris, France
| | - Albena Dinkova-Kostova
- Division of Cellular and Systems Medicine, Jacqui Wood Cancer Centre, School of Medicine, University of Dundee, Dundee, UK
| | - Heath Ecroyd
- Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales 2522, Australia
| | - Adrienne L Edkins
- Biomedical Biotechnology Research Unit (BioBRU), Department of Biochemistry and Microbiology, Rhodes University, Makhanda, South Africa
| | - Takanori Eguchi
- Department of Dental Pharmacology, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8525, Japan
| | - Monika Fleshner
- Department of Integrative Physiology, University of Colorado at Boulder, Boulder, CO 80309, USA
| | | | - Sotirios Fragkostefanakis
- Department of Biosciences, Molecular Cell Biology of Plants, Goethe University Frankfurt am Main, Frankfurt am Main 60438, Germany
| | - Jason Gestwicki
- Institute for Neurodegenerative Diseases, University of California, San Francisco, CA 94158, USA
| | - Pierre Goloubinoff
- Department of Plant Molecular Biology, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland
| | - Jennifer A Heritz
- Department of Urology, SUNY Upstate Medical University, Syracuse, NY 13210, USA; Upstate Cancer Center, SUNY Upstate Medical University, Syracuse, NY 13210, USA; Department of Biochemistry and Molecular Biology, SUNY Upstate Medical University, Syracuse, NY 13210, USA
| | - Christine M Heske
- Pediatric Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Jonathan D Hibshman
- Biology Department, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Jenny Joutsen
- Department of Pathology, Lapland Central Hospital, Lapland Wellbeing Services County, Rovaniemi, Finland
| | - Wei Li
- Department of Dermatology and the Norris Comprehensive Cancer Center, University of Southern California Keck Medical Center, Los Angeles, CA 90033, USA
| | - Michael Lynes
- Department of Molecular and Cell Biology, University of Connecticut, Storrs, CT 06269, USA
| | - Marc L Mendillo
- Department of Biochemistry and Molecular Genetics, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA; Simpson Querrey Center for Epigenetics, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
| | - Nahid Mivechi
- Molecular Chaperone Biology, Medical College of Georgia, Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA
| | - Fortunate Mokoena
- Department of Biochemistry, North-West University, Mmabatho 2735, South Africa
| | - Yuka Okusha
- Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Veena Prahlad
- Department of Cell Stress Biology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14203, USA
| | - Elizabeth Repasky
- Department of Hematology and Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Sara Sannino
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Federica Scalia
- Department of Biomedicine, Neuroscience and Advanced Diagnostics (BIND), University of Palermo, Palermo, Italy; Euro-Mediterranean Institute of Science and Technology (IEMEST), Palermo, Italy
| | - Reut Shalgi
- Department of Biochemistry, Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 31096, Israel
| | - Lea Sistonen
- Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, Turku, Finland; Turku Bioscience Centre, University of Turku and Åbo Akademi University, Turku, Finland
| | - Emily Sontag
- Department of Biological Sciences, Marquette University, Milwaukee, WI 53233, USA
| | | | - Anniina Vihervaara
- Department of Gene Technology, KTH Royal Institute of Technology, Science for Life Laboratory, Stockholm, Sweden
| | - Anushka Wickramaratne
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Shawn Xiang Yang Wang
- Developmental Therapeutics Program, VCU Comprehensive Massey Cancer Center, VCU Institute of Molecular Medicine, Virginia Commonwealth University, School of Medicine, Richmond, VA 23298, USA
| | - Tawanda Zininga
- Department of Biochemistry, Stellenbosch University, Stellenbosch 7602, South Africa
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Eisa NH, Crowley VM, Elahi A, Kommalapati VK, Serwetnyk MA, Llbiyi T, Lu S, Kainth K, Jilani Y, Marasco D, El Andaloussi A, Lee S, Tsai FT, Rodriguez PC, Munn D, Celis E, Korkaya H, Debbab A, Blagg B, Chadli A. Enniatin A inhibits the chaperone Hsp90 and unleashes the immune system against triple-negative breast cancer. iScience 2023; 26:108308. [PMID: 38025772 PMCID: PMC10663837 DOI: 10.1016/j.isci.2023.108308] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 08/21/2023] [Accepted: 10/20/2023] [Indexed: 12/01/2023] Open
Abstract
Low response rates and immune-related adverse events limit the remarkable impact of cancer immunotherapy. To improve clinical outcomes, preclinical studies have shown that combining immunotherapies with N-terminal Hsp90 inhibitors resulted in improved efficacy, even though induction of an extensive heat shock response (HSR) and less than optimal dosing of these inhibitors limited their clinical efficacy as monotherapies. We discovered that the natural product Enniatin A (EnnA) targets Hsp90 and destabilizes its client oncoproteins without inducing an HSR. EnnA triggers immunogenic cell death in triple-negative breast cancer (TNBC) syngeneic mouse models and exhibits superior antitumor activity compared to Hsp90 N-terminal inhibitors. EnnA reprograms the tumor microenvironment (TME) to promote CD8+ T cell-dependent antitumor immunity by reducing PD-L1 levels and activating the chemokine receptor CX3CR1 pathway. These findings provide strong evidence for transforming the immunosuppressive TME into a more tumor-hostile milieu by engaging Hsp90 with therapeutic agents involving novel mechanisms of action.
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Affiliation(s)
- Nada H. Eisa
- Georgia Cancer Center, Medical College of Georgia at Augusta University, 1410 Laney Walker Boulevard, CN-3329, Augusta, GA 30912, USA
| | - Vincent M. Crowley
- Department of Chemistry and Biochemistry, The University of Notre Dame, 305 McCourtney Hall, Notre Dame, IN 46556, USA
| | - Asif Elahi
- Georgia Cancer Center, Medical College of Georgia at Augusta University, 1410 Laney Walker Boulevard, CN-3329, Augusta, GA 30912, USA
| | - Vamsi Krishna Kommalapati
- Georgia Cancer Center, Medical College of Georgia at Augusta University, 1410 Laney Walker Boulevard, CN-3329, Augusta, GA 30912, USA
| | - Michael A. Serwetnyk
- Department of Chemistry and Biochemistry, The University of Notre Dame, 305 McCourtney Hall, Notre Dame, IN 46556, USA
| | - Taoufik Llbiyi
- Georgia Cancer Center, Medical College of Georgia at Augusta University, 1410 Laney Walker Boulevard, CN-3329, Augusta, GA 30912, USA
| | - Sumin Lu
- Georgia Cancer Center, Medical College of Georgia at Augusta University, 1410 Laney Walker Boulevard, CN-3329, Augusta, GA 30912, USA
| | - Kashish Kainth
- Georgia Cancer Center, Medical College of Georgia at Augusta University, 1410 Laney Walker Boulevard, CN-3329, Augusta, GA 30912, USA
| | - Yasmeen Jilani
- Georgia Cancer Center, Medical College of Georgia at Augusta University, 1410 Laney Walker Boulevard, CN-3329, Augusta, GA 30912, USA
| | - Daniela Marasco
- Department of Pharmacy, University of Naples “Federico II”, Via Montesano, 49, 80131 Naples, Italy
| | - Abdeljabar El Andaloussi
- Georgia Cancer Center, Medical College of Georgia at Augusta University, 1410 Laney Walker Boulevard, CN-3329, Augusta, GA 30912, USA
| | - Sukyeong Lee
- Departments of Biochemistry and Molecular Biology, Molecular and Cellular Biology, and Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Francis T.F. Tsai
- Departments of Biochemistry and Molecular Biology, Molecular and Cellular Biology, and Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Paulo C. Rodriguez
- Department of Immunology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA
| | - David Munn
- Georgia Cancer Center, Medical College of Georgia at Augusta University, 1410 Laney Walker Boulevard, CN-3329, Augusta, GA 30912, USA
| | - Esteban Celis
- Georgia Cancer Center, Medical College of Georgia at Augusta University, 1410 Laney Walker Boulevard, CN-3329, Augusta, GA 30912, USA
| | - Hasan Korkaya
- Georgia Cancer Center, Medical College of Georgia at Augusta University, 1410 Laney Walker Boulevard, CN-3329, Augusta, GA 30912, USA
| | - Abdessamad Debbab
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, Building 26.23, 40225 Düsseldorf, Germany
| | - Brian Blagg
- Department of Chemistry and Biochemistry, The University of Notre Dame, 305 McCourtney Hall, Notre Dame, IN 46556, USA
| | - Ahmed Chadli
- Georgia Cancer Center, Medical College of Georgia at Augusta University, 1410 Laney Walker Boulevard, CN-3329, Augusta, GA 30912, USA
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Serwetnyk M, Crowley VM, Brackett CM, Carter TR, Elahi A, Kommalapati VK, Chadli A, Blagg BSJ. Enniatin A Analogues as Novel Hsp90 Inhibitors that Modulate Triple-Negative Breast Cancer. ACS Med Chem Lett 2023; 14:1785-1790. [PMID: 38116437 PMCID: PMC10726464 DOI: 10.1021/acsmedchemlett.3c00423] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/13/2023] [Accepted: 11/14/2023] [Indexed: 12/21/2023] Open
Abstract
The 90 kilo-Dalton heat shock protein (Hsp90) is a molecular chaperone that facilitates the maturation of nascent polypeptides into their biologically active conformation. Because many of the >400 known client protein substrates are implicated in the development/progression of cancer, it is hypothesized that Hsp90 inhibition will simultaneously shut down numerous oncogenic pathways. Unfortunately, most of the small molecule Hsp90 inhibitors that have undergone clinical evaluation thus far have failed due to various toxicities. Therefore, the disruption of Hsp90 protein-protein interactions with cochaperones and/or client substrates has been proposed as an alternative way to achieve Hsp90 inhibition without such adverse events. The hexadepsipeptide Enniatin A (EnnA) has recently been reported to be one such inhibitor that also manifests immunogenic activity. Herein, we report preliminary structure-activity relationship (SAR) studies to determine the structural features that confer this unprecedented activity for an Hsp90 inhibitor. Our studies find that EnnA's branching moieties are necessary for its activity, but some structural modifications are tolerated.
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Affiliation(s)
- Michael
A. Serwetnyk
- Department
of Chemistry and Biochemistry, Warren Family Research Center for Drug
Discovery and Development, The University
of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Vincent M. Crowley
- Department
of Medicinal Chemistry, The University of
Kansas, Lawrence, Kansas 66045, United States
| | - Christopher M. Brackett
- Department
of Chemistry and Biochemistry, Warren Family Research Center for Drug
Discovery and Development, The University
of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Trever R. Carter
- Department
of Chemistry and Biochemistry, Warren Family Research Center for Drug
Discovery and Development, The University
of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Asif Elahi
- Georgia
Cancer Center, Medical College of Georgia
at Augusta University, 1410 Laney Walker Boulevard, Augusta, Georgia 30912, United States
| | - Vamsi Krishna Kommalapati
- Georgia
Cancer Center, Medical College of Georgia
at Augusta University, 1410 Laney Walker Boulevard, Augusta, Georgia 30912, United States
| | - Ahmed Chadli
- Georgia
Cancer Center, Medical College of Georgia
at Augusta University, 1410 Laney Walker Boulevard, Augusta, Georgia 30912, United States
| | - Brian S. J. Blagg
- Department
of Chemistry and Biochemistry, Warren Family Research Center for Drug
Discovery and Development, The University
of Notre Dame, Notre
Dame, Indiana 46556, United States
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Ajith A, Mamouni K, Horuzsko DD, Musa A, Dzutsev AK, Fang JR, Chadli A, Zhu X, Lebedyeva I, Trinchieri G, Horuzsko A. Targeting TREM1 augments antitumor T cell immunity by inhibiting myeloid-derived suppressor cells and restraining anti-PD-1 resistance. J Clin Invest 2023; 133:e167951. [PMID: 37651197 PMCID: PMC10617775 DOI: 10.1172/jci167951] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 12/09/2022] [Accepted: 08/29/2023] [Indexed: 09/02/2023] Open
Abstract
The triggering receptor expressed on myeloid cell 1 (TREM1) plays a critical role in development of chronic inflammatory disorders and the inflamed tumor microenvironment (TME) associated with most solid tumors. We examined whether loss of TREM1 signaling can abrogate the immunosuppressive TME and enhance cancer immunity. To investigate the therapeutic potential of TREM1 in cancer, we used mice deficient in Trem1 and developed a novel small molecule TREM1 inhibitor, VJDT. We demonstrated that genetic or pharmacological TREM1 silencing significantly delayed tumor growth in murine melanoma (B16F10) and fibrosarcoma (MCA205) models. Single-cell RNA-Seq combined with functional assays during TREM1 deficiency revealed decreased immunosuppressive capacity of myeloid-derived suppressor cells (MDSCs) accompanied by expansion in cytotoxic CD8+ T cells and increased PD-1 expression. Furthermore, TREM1 inhibition enhanced the antitumorigenic effect of anti-PD-1 treatment, in part, by limiting MDSC frequency and abrogating T cell exhaustion. In patient-derived melanoma xenograft tumors, treatment with VJDT downregulated key oncogenic signaling pathways involved in cell proliferation, migration, and survival. Our work highlights the role of TREM1 in cancer progression, both intrinsically expressed in cancer cells and extrinsically in the TME. Thus, targeting TREM1 to modify an immunosuppressive TME and improve efficacy of immune checkpoint therapy represents what we believe to be a promising therapeutic approach to cancer.
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Affiliation(s)
- Ashwin Ajith
- Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Kenza Mamouni
- Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Daniel D. Horuzsko
- Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Abu Musa
- Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Amiran K. Dzutsev
- Laboratory of Integrative Cancer Immunology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Jennifer R. Fang
- Laboratory of Integrative Cancer Immunology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Ahmed Chadli
- Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Xingguo Zhu
- Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Iryna Lebedyeva
- Department of Chemistry and Physics, Augusta University, Augusta, Georgia, USA
| | - Giorgio Trinchieri
- Laboratory of Integrative Cancer Immunology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Anatolij Horuzsko
- Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
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Patwardhan CA, Kommalapati VK, Llbiyi T, Singh D, Alfa E, Horuzsko A, Korkaya H, Panda S, Reilly CA, Popik V, Chadli A. Capsaicin binds the N-terminus of Hsp90, induces lysosomal degradation of Hsp70, and enhances the anti-tumor effects of 17-AAG (Tanespimycin). Sci Rep 2023; 13:13790. [PMID: 37612326 PMCID: PMC10447550 DOI: 10.1038/s41598-023-40933-9] [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: 06/26/2023] [Accepted: 08/18/2023] [Indexed: 08/25/2023] Open
Abstract
Heat shock protein 90 (Hsp90) and its co-chaperones promote cancer, and targeting Hsp90 holds promise for cancer treatment. Most of the efforts to harness this potential have focused on targeting the Hsp90 N-terminus ATP binding site. Although newer-generation inhibitors have shown improved efficacy in aggressive cancers, induction of the cellular heat shock response (HSR) by these inhibitors is thought to limit their clinical efficacy. Therefore, Hsp90 inhibitors with novel mechanisms of action and that do not trigger the HSR would be advantageous. Here, we investigated the mechanism by which capsaicin inhibits Hsp90. Through mutagenesis, chemical modifications, and proteomic studies, we show that capsaicin binds to the N-terminus of Hsp90 and inhibits its ATPase activity. Consequently, capsaicin and its analogs inhibit Hsp90 ATPase-dependent progesterone receptor reconstitution in vitro. Capsaicin did not induce the HSR, instead, it promoted the degradation of Hsp70 through the lysosome-autophagy pathway. Remarkably, capsaicin did not induce degradation of the constitutively expressed cognate Hsc70, indicating selectivity for Hsp70. Combined treatments of capsaicin and the Hsp90 inhibitor 17-AAG improved the anti-tumor efficacy of 17-AAG in cell culture and tridimensional tumor spheroid growth assays using breast and prostate cancer models. Consistent with this, in silico docking studies revealed that capsaicin binding to the ATP binding site of Hsp90 was distinct from classical N-terminus Hsp90 inhibitors, indicating a novel mechanism of action. Collectively, these findings support the use of capsaicin as a chemical scaffold to develop novel Hsp90 N-terminus inhibitors as well as its ability to be a potential cancer co-therapeutic.
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Affiliation(s)
- Chaitanya A Patwardhan
- Georgia Cancer Center at Augusta University (Formerly Medical College of Georgia), 1410 Laney Walker Blvd, CN-3313, Augusta, GA, 30912, USA
| | - Vamsi Krishna Kommalapati
- Georgia Cancer Center at Augusta University (Formerly Medical College of Georgia), 1410 Laney Walker Blvd, CN-3313, Augusta, GA, 30912, USA
| | - Taoufik Llbiyi
- Georgia Cancer Center at Augusta University (Formerly Medical College of Georgia), 1410 Laney Walker Blvd, CN-3313, Augusta, GA, 30912, USA
| | - Digvijay Singh
- Georgia Cancer Center at Augusta University (Formerly Medical College of Georgia), 1410 Laney Walker Blvd, CN-3313, Augusta, GA, 30912, USA
| | - Eyad Alfa
- Georgia Cancer Center at Augusta University (Formerly Medical College of Georgia), 1410 Laney Walker Blvd, CN-3313, Augusta, GA, 30912, USA
| | - Anatolij Horuzsko
- Georgia Cancer Center at Augusta University (Formerly Medical College of Georgia), 1410 Laney Walker Blvd, CN-3313, Augusta, GA, 30912, USA
| | - Hasan Korkaya
- Georgia Cancer Center at Augusta University (Formerly Medical College of Georgia), 1410 Laney Walker Blvd, CN-3313, Augusta, GA, 30912, USA
| | - Siva Panda
- Department of Chemistry and Biochemistry, Augusta University, Augusta, GA, 30912, USA
| | - Christopher A Reilly
- Department of Pharmacology and Toxicology, Center for Human Toxicology, College of Pharmacy, University of Utah, Salt Lake City, UT, 84112, USA
| | - Vladimir Popik
- Department of Chemistry, University of Georgia, Athens, GA, 30602, USA
| | - Ahmed Chadli
- Georgia Cancer Center at Augusta University (Formerly Medical College of Georgia), 1410 Laney Walker Blvd, CN-3313, Augusta, GA, 30912, USA.
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Eisa N, Crowley VM, Elahi A, Kommalapati VK, Korkaya H, Debbab A, Blagg B, Chadli A. Abstract 2272: Targeting the chaperone Hsp90 to activate the immune system and eradicate the triple negative breast cancer. Cancer Res 2023. [DOI: 10.1158/1538-7445.am2023-2272] [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: 04/07/2023]
Abstract
Abstract
Low response rates and immune-related adverse events limit the impact of cancer immunotherapy. To improve clinical outcomes, preclinical studies have shown that combining immunotherapies with N-terminal Hsp90 inhibitors resulted in improved efficacy, even though induction of an extensive heat shock response (HSR) with these inhibitors limited their clinical efficacy as monotherapies. We discovered that Enniatin A (EnnA) binds to the interface between the middle domains of the Hsp90 dimer and destabilizes Hsp90 client oncoproteins without inducing an HSR. EnnA induces cancer cell immunogenic cell death in aggressive breast cancer models and exhibits superior anti-tumor activity compared to Hsp90 N-terminal inhibitors. EnnA reprograms the tumor microenvironment in syngeneic mouse models to promote CD8+ T cell-dependent anti-tumor activity mediated through a reduced level of PD-L1 and activation of CX3CR1 pathway. We propose that EnnA is a promising anti-tumor agent with a mechanism of action involving immunogenic cancer cell toxicity and mobilization of CD8+ T cells into the tumor site.
Citation Format: Nada Eisa, Vincent M. Crowley, Asif Elahi, Vamsi K. Kommalapati, Hasan Korkaya, Abdessamad Debbab, Brian Blagg, Ahmed Chadli. Targeting the chaperone Hsp90 to activate the immune system and eradicate the triple negative breast cancer [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 2272.
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Affiliation(s)
- Nada Eisa
- 1Augusta University Medical Center, Augusta, GA
| | | | - Asif Elahi
- 1Augusta University Medical Center, Augusta, GA
| | | | | | | | - Brian Blagg
- 2The University of Notre Dame, Notre Dame, IN
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Kamgain Simeu L, Mjabber A, Haraj N, El Aziz S, Chadli A. Place des injections de plasma riche en plaquettes autologue dans la prise en charge des ulcères du pied diabétique (résultats préliminaires). Annales d'Endocrinologie 2023. [DOI: 10.1016/j.ando.2022.12.343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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Ouhessaine S, Haraj N, El Aziz S, Chadli A. Profil impédencemètrique en postopératoire des patients gastréctomisés : à propos de 18 cas. Annales d'Endocrinologie 2023. [DOI: 10.1016/j.ando.2022.12.235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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10
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Mbossa Lembopo P, Haraj N, El Aziz S, Chadli A. Les masses surrénaliennes : expérience du service d’endocrinologie à propos de 65 cas. Annales d'Endocrinologie 2023. [DOI: 10.1016/j.ando.2022.12.155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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11
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Mbossa Lembopo P, Haraj N, El Aziz S, Chadli A. Diagnostic et prise en charge du phéochromocytome malin : à propos de 12 cas. Annales d'Endocrinologie 2023. [DOI: 10.1016/j.ando.2022.12.151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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12
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Gueddari A, Haraj N, Elaziz S, Chadli A. Syndrome de Cushing révélé au cours d’une grossesse : à propos d’un cas. Annales d'Endocrinologie 2023. [DOI: 10.1016/j.ando.2022.12.152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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13
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Mbossa Lembopo P, Haraj N, El Aziz S, Chadli A. L’hypertension artérielle au cours de l’adénome de Conn : à propos de 11 cas. Annales d'Endocrinologie 2023. [DOI: 10.1016/j.ando.2022.12.154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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14
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Dezoumbe N, Haraj N, El Aziz S, Chadli A. Carcinome thyroïdien différencié chez le sujet âgé : à propos de 88 cas. Annales d'Endocrinologie 2023. [DOI: 10.1016/j.ando.2022.12.236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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15
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Charkaoui S, Haraj N, El Aziz S, Chadli A. Diabète et Ramadan : impact de l’éducation thérapeutique et du conseil religieux sur la décision du jeûne du mois de Ramadan chez les patients diabétiques à haut risque de jeûner. Annales d'Endocrinologie 2023. [DOI: 10.1016/j.ando.2022.12.340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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16
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Hamza Maliki B, Haraj N, Elaziz S, Chadli A. Les complications rhumatologiques de l’acromégalie : a propos de 59 cas. Annales d'Endocrinologie 2023. [DOI: 10.1016/j.ando.2022.12.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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17
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Iggar M, Haraj N, El Aziz S, Chadli A. Hyperaldostéronisme primaire révélant un corticosurrénale : à propos d’un cas. Annales d'Endocrinologie 2023. [DOI: 10.1016/j.ando.2022.12.153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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18
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Bachir Moctar R, Bensba S, Haraj N, El Aziz S, Chadli A. Hypertension artérielle chez la femme avec grossesse diabétique. Annales d'Endocrinologie 2023. [DOI: 10.1016/j.ando.2022.12.220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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Traore B, El baidouri M, Elaziz S, Nani S, Haraj N, Chadli A. Déterminant de l'activité Physique chez le personnel paramédical : Etude transversale. Rev Epidemiol Sante Publique 2022. [DOI: 10.1016/j.respe.2022.03.054] [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: 11/30/2022] Open
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Traoré B, Tsoumbou-Bakana G, Elbaidouri M, Elaziz S, Nani S, Haraj N, Chadli A. Déterminants de la sédentarité chez le personnel paramédical. Rev Epidemiol Sante Publique 2022. [DOI: 10.1016/j.respe.2022.01.048] [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: 10/18/2022] Open
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21
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Kamgain Simeu L, Haraj N, El Aziz S, Chadli A. Le syndrome de Nelson à propos de trois cas. Annales d'Endocrinologie 2021. [DOI: 10.1016/j.ando.2021.08.093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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22
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El Khomri A, Bensbaa S, Haraj N, El Aziz S, Chadli A. Stress et grossesse diabétique : à propos de 90 cas. Annales d'Endocrinologie 2021. [DOI: 10.1016/j.ando.2021.08.744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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Settai Y, Bensbaa S, Haraj N, El Aziz S, Chadli A. Télé-conseil chez les grossesses diabétiques durant la pandémie COVID-19 : satisfaction des patientes. Annales d'Endocrinologie 2021. [PMCID: PMC8462750 DOI: 10.1016/j.ando.2021.08.267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Bai W, Fadil Y, Chadli A, Dakir M, Debbagh A, Aboutaeib R. Correlation between CT and anatomopathological staging of kidney cancer. Int J Surg Case Rep 2021; 80:105687. [PMID: 33676291 PMCID: PMC7982452 DOI: 10.1016/j.ijscr.2021.105687] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 02/17/2021] [Accepted: 02/17/2021] [Indexed: 11/22/2022] Open
Abstract
Our Moroccan context is experiencing an increase in the frequency of renal tumors. This trend can be explained by the generalization of the use of imaging, in particular abdominal ultrasound, which has become almost systematic among general practitioners (Godley and Ataga, 2000 [1]). The specificity of kidney cancer is anatomopathological heterogenicity: histological type, nuclear grade, tumor stage, these elements constitute the most important prognostic factors. Renal biopsy appears to be a safe and reliable solution with a low risk of tumor seeding and complications, however it cannot provide all the detailed histological information needed. Hence the interest in the abdominal scanner. The abdominal scanner is the reference examination for the evaluation of renal tumors, it diagnoses the tumor, specifies these characteristics, it assesses the loco regional, venous extension. The objective of our study is to correlate pathological and CT findings of 70 kidney cancer in order to determine the reliability of CT in kidney cancer and its extension.
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Affiliation(s)
- W Bai
- Service d'urologie, hôpital ibn rochd, Casablanca, Morocco; Faculté de médecine et de pharmacie, université Hassan II, Morocco.
| | - Y Fadil
- Service d'urologie, hôpital ibn rochd, Casablanca, Morocco; Faculté de médecine et de pharmacie, université Hassan II, Morocco
| | - A Chadli
- Service d'urologie, hôpital ibn rochd, Casablanca, Morocco; Faculté de médecine et de pharmacie, université Hassan II, Morocco
| | - M Dakir
- Service d'urologie, hôpital ibn rochd, Casablanca, Morocco; Faculté de médecine et de pharmacie, université Hassan II, Morocco
| | - A Debbagh
- Service d'urologie, hôpital ibn rochd, Casablanca, Morocco; Faculté de médecine et de pharmacie, université Hassan II, Morocco
| | - R Aboutaeib
- Service d'urologie, hôpital ibn rochd, Casablanca, Morocco; Faculté de médecine et de pharmacie, université Hassan II, Morocco
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Taleb El Houda FZ, Haraj NE, El Aziz S, Chadli A. [Infiltrative lesions of the feet]. Rev Med Interne 2020; 42:367-368. [PMID: 33223196 DOI: 10.1016/j.revmed.2020.10.377] [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] [Received: 09/02/2020] [Revised: 09/16/2020] [Accepted: 10/18/2020] [Indexed: 11/16/2022]
Affiliation(s)
- F Z Taleb El Houda
- Service d'Endocrinologie, Diabétologie et Maladies Métaboliques, CHU Ibn Rochd, Casablanca, Maroc; Laboratoire de Neuroscience et Santé Mentale, Faculté de Médecine et de Pharmacie, Université Hassan II, Casablanca, Maroc
| | - N E Haraj
- Service d'Endocrinologie, Diabétologie et Maladies Métaboliques, CHU Ibn Rochd, Casablanca, Maroc; Laboratoire de Neuroscience et Santé Mentale, Faculté de Médecine et de Pharmacie, Université Hassan II, Casablanca, Maroc
| | - S El Aziz
- Service d'Endocrinologie, Diabétologie et Maladies Métaboliques, CHU Ibn Rochd, Casablanca, Maroc; Laboratoire de Neuroscience et Santé Mentale, Faculté de Médecine et de Pharmacie, Université Hassan II, Casablanca, Maroc
| | - A Chadli
- Service d'Endocrinologie, Diabétologie et Maladies Métaboliques, CHU Ibn Rochd, Casablanca, Maroc; Laboratoire de Neuroscience et Santé Mentale, Faculté de Médecine et de Pharmacie, Université Hassan II, Casablanca, Maroc.
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26
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Moataz A, Chadli A, Wichou E, Gallouo M, Jandou I, Saber S, Serhier Z, Dakir M, Debbagh A, Aboutaieb R. [Predictors of catheter-related bladder discomfort]. Prog Urol 2020; 30:1045-1050. [PMID: 33011083 DOI: 10.1016/j.purol.2020.09.014] [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] [Received: 04/07/2020] [Revised: 07/14/2020] [Accepted: 09/04/2020] [Indexed: 10/23/2022]
Abstract
INTRODUCTION Establish a descriptive epidemiological profile of patients with Catheter Related Bladder Discomfort (CRBD) and identify its predictive factors. MATERIAL AND METHOD Between June 2019 and December 2019, 300 patients have been evaluated. Different parameters were taken into account including: sex, age, body mass index (BMI), historical health data, duration and indications of the urinary catheterization, type of the transurethral catheter used, lubrication of the catheter and the existence of CRBD. We grouped our patients according to the intensity of CRBD syndrome. The various factors likely to be correlated with the occurrence of CRBD were subject of a univariate then multivariate analysis. RESULTS 300 patients were included. The average age was 49 years (133 men and 167 women). 68 patients (22.6%) had history of urinary catheterization. 19% of patients were catheterized for acute urinary retention, while 81% were catheterized before surgery. The average duration of the urinary catheterization was 2.5 days. 54% showed CRBD symptoms, including more than 92% on the first day of the urinary catheterization. The significant risk factors in multivariate analysis were: the caliber of the catheter ≥18 Fr, the absence of lubrication, laparotomy, age <50 years, Cesarean and urinary catheterization medical history. CONCLUSION This study identified various factors incriminated in the occurrence of CRBD. The role of the hospital practitioner is to prevent this syndrome by reducing predictive factors, particularly the technical ones. LEVEL OF EVIDENCE 3.
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Affiliation(s)
- A Moataz
- Service d'urologie, centre hospitalier universitaire Ibn Rochd, Casablanca, Maroc.
| | - A Chadli
- Service d'urologie, centre hospitalier universitaire Ibn Rochd, Casablanca, Maroc
| | - E Wichou
- Service d'urologie, centre hospitalier universitaire Ibn Rochd, Casablanca, Maroc
| | - M Gallouo
- Service d'urologie, centre hospitalier universitaire Ibn Rochd, Casablanca, Maroc
| | - I Jandou
- Service d'urologie, centre hospitalier universitaire Ibn Rochd, Casablanca, Maroc
| | - S Saber
- Centre des études doctorales, faculté de médecine et de pharmacie, université Hassan II, Casablanca, Maroc
| | - Z Serhier
- Service d'informatique médicale, faculté de médecine et de pharmacie, université Hassan II, Casablanca, Maroc
| | - M Dakir
- Service d'urologie, centre hospitalier universitaire Ibn Rochd, Casablanca, Maroc
| | - A Debbagh
- Service d'urologie, centre hospitalier universitaire Ibn Rochd, Casablanca, Maroc
| | - R Aboutaieb
- Service d'urologie, centre hospitalier universitaire Ibn Rochd, Casablanca, Maroc
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27
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Moataz A, Hamirifou M, Wichou E, Chadli A, Jandou I, Gallouo M, Moutaouadia I, Dakir M, Debbagh A, Aboutaieb R. Sexualité des jeunes marocains : connaissances, attitudes et pratiques. Sexologies 2020. [DOI: 10.1016/j.sexol.2020.06.002] [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: 11/26/2022]
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Lemos H, Ou R, McCardle C, Lin Y, Calver J, Minett J, Chadli A, Huang L, Mellor AL. Overcoming resistance to STING agonist therapy to incite durable protective antitumor immunity. J Immunother Cancer 2020; 8:e001182. [PMID: 32847988 PMCID: PMC7451475 DOI: 10.1136/jitc-2020-001182] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/23/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Activating the Stimulator of Interferon Genes (STING) adaptor incites antitumor immunity against immunogenic tumors in mice, prompting clinical trials to test STING activators. However, STING signaling in the tumor microenvironment (TME) during development of Lewis lung carcinoma (LLC) suppresses antitumor immunity to promote tumor growth. We hypothesized that local immune balance favoring suppression of antitumor immunity also attenuates antitumor responses following STING activation. The purpose of this study was to evaluate how STING activation impacts antitumor responses in mice bearing LLC tumors. METHODS Mice bearing established LLC tumors were treated with synthetic cyclic diadenyl monophosphate (CDA) to activate STING. Mice were monitored to assess LLC tumor growth, survival and protective antitumor immunity. Transcriptional and metabolic analyses were used to identify pathways responsive to CDA, and mice were co-treated with CDA and drugs that disrupt these pathways. RESULTS CDA slowed LLC tumor growth but most CDA-treated mice (77%) succumbed to tumor growth. No evidence of tumor relapse was found in surviving CDA-treated mice at experimental end points but mice were not immune to LLC challenge. CDA induced rapid increase in immune regulatory pathways involving programmed death-1 (PD-1), indoleamine 2,3 dioxygenase (IDO) and cyclooxygenase-2 (COX2) in the TME. PD-1 blockade enhanced antitumor responses to CDA and increased mouse survival but mice did not eliminate primary tumor burdens. Two IDO inhibitor drugs had little or no beneficial effects on antitumor responses to CDA. A third IDO inhibitor drug synergized with CDA to enhance tumor control and survival but mice did not eliminate primary tumor burdens. In contrast, co-treatments with CDA and the COX2-selective inhibitor celecoxib controlled tumor growth, leading to uniform survival without relapse, and mice acquired resistance to LLC re-challenge and growth of distal tumors not exposed directly to CDA. Thus, mice co-treated with CDA and celecoxib acquired stable and systemic antitumor immunity. CONCLUSIONS STING activation incites potent antitumor responses and boosts local immune regulation to attenuate antitumor responses. Blocking STING-responsive regulatory pathways synergizes with CDA to enhance antitumor responses, particularly COX2 inhibition. Thus, therapy-induced resistance to STING may necessitate co-treatments to disrupt regulatory pathways responsive to STING in patients with cancer.
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Affiliation(s)
- Henrique Lemos
- Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, Tyne and Wear, UK
| | - Rong Ou
- Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, Tyne and Wear, UK
| | - Caroline McCardle
- Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, Tyne and Wear, UK
| | - Yijun Lin
- Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, Tyne and Wear, UK
| | - Jessica Calver
- Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, Tyne and Wear, UK
| | - Jack Minett
- Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, Tyne and Wear, UK
| | - Ahmed Chadli
- Georgia Cancer Center, Augusta University Medical College of Georgia, Augusta, Georgia, USA
| | - Lei Huang
- Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, Tyne and Wear, UK
| | - Andrew L Mellor
- Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, Tyne and Wear, UK
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Piranlioglu R, Lee E, Ouzounova M, Bollag RJ, Vinyard AH, Arbab AS, Marasco D, Guzel M, Cowell JK, Thangaraju M, Chadli A, Hassan KA, Wicha MS, Celis E, Korkaya H. Primary tumor-induced immunity eradicates disseminated tumor cells in syngeneic mouse model. Nat Commun 2019; 10:1430. [PMID: 30926774 PMCID: PMC6441000 DOI: 10.1038/s41467-019-09015-1] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 02/14/2019] [Indexed: 02/07/2023] Open
Abstract
Although clinically apparent metastasis is associated with late stages of cancer development, micro-metastatic dissemination may be an early event. However, the fate of these early disseminated tumor cells (DTC) remains elusive. We show that despite their capacity to disseminate into secondary organs, 4T1 tumor models develop overt metastasis while EMT6-tumor bearing mice clear DTCs shed from primary tumors as well as those introduced by intravenous (IV) injection. Following the surgical resection of primary EMT6 tumors, mice do not develop detectable metastasis and reject IV-injected tumor cells. In contrast, these cells readily grow and metastasize in immuno-deficient athymic or Rag2−/− mice, an effect mimicked by CD8+ T-cell depletion in immunocompetent mice. Furthermore, recombinant G-CSF or adoptive transfer of granulocytic-MDSCs isolated from 4T1 tumor-bearing mice, induce metastasis by suppressing CD8+ T-cells in EMT6-primed mice. Our studies support the concept of immune surveillance providing molecular insights into the immune mechanisms during tumor progression. Dissemination of tumor cells from the primary site is an early event. Here, the authors show that the early disseminated tumor cells are actively cleared by the host cytotoxic T lymphocytes induced by the primary tumor and that infiltration of granulocytic myeloid-derived suppressor cells counteracts such immune protection and allow metastasis development.
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Affiliation(s)
- Raziye Piranlioglu
- Georgia Cancer Center, Department of Biochemistry and Molecular Biology, Augusta University, 1410 Laney Walker Blvd. CN2136, Augusta, GA, 30912, USA
| | - EunMi Lee
- Georgia Cancer Center, Department of Biochemistry and Molecular Biology, Augusta University, 1410 Laney Walker Blvd. CN2136, Augusta, GA, 30912, USA
| | - Maria Ouzounova
- Cancer Research Center of Lyon, 28 Rue Laennec, 69008, Lyon, France
| | - Roni J Bollag
- Georgia Cancer Center, Department of Biochemistry and Molecular Biology, Augusta University, 1410 Laney Walker Blvd. CN2136, Augusta, GA, 30912, USA
| | - Alicia H Vinyard
- Georgia Cancer Center, Department of Biochemistry and Molecular Biology, Augusta University, 1410 Laney Walker Blvd. CN2136, Augusta, GA, 30912, USA
| | - Ali S Arbab
- Georgia Cancer Center, Department of Biochemistry and Molecular Biology, Augusta University, 1410 Laney Walker Blvd. CN2136, Augusta, GA, 30912, USA
| | - Daniela Marasco
- Department of Pharmacy, University of Naples "Federico II", 80134, Naples, Italy
| | - Mustafa Guzel
- Regenerative and Restorative Research Center (REMER), Medipol University, Kavacık Mah. Ekinciler Cad. No.19 Kavacık Kavşağı - Beykoz, 34810, İstanbul Istanbul, Turkey
| | - John K Cowell
- Georgia Cancer Center, Department of Biochemistry and Molecular Biology, Augusta University, 1410 Laney Walker Blvd. CN2136, Augusta, GA, 30912, USA
| | - Muthushamy Thangaraju
- Georgia Cancer Center, Department of Biochemistry and Molecular Biology, Augusta University, 1410 Laney Walker Blvd. CN2136, Augusta, GA, 30912, USA
| | - Ahmed Chadli
- Georgia Cancer Center, Department of Biochemistry and Molecular Biology, Augusta University, 1410 Laney Walker Blvd. CN2136, Augusta, GA, 30912, USA
| | - Khaled A Hassan
- Comprehensive Cancer Center, University of Michigan, 1500 E. Medical Center Dr, Ann Arbor, MI, 48109, USA
| | - Max S Wicha
- Comprehensive Cancer Center, University of Michigan, 1500 E. Medical Center Dr, Ann Arbor, MI, 48109, USA
| | - Esteban Celis
- Georgia Cancer Center, Department of Biochemistry and Molecular Biology, Augusta University, 1410 Laney Walker Blvd. CN2136, Augusta, GA, 30912, USA
| | - Hasan Korkaya
- Georgia Cancer Center, Department of Biochemistry and Molecular Biology, Augusta University, 1410 Laney Walker Blvd. CN2136, Augusta, GA, 30912, USA.
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Eisa NH, Jilani Y, Kainth K, Redd P, Lu S, Bougrine O, Abdul Sater H, Patwardhan CA, Shull A, Shi H, Liu K, Elsherbiny NM, Eissa LA, El-Shishtawy MM, Horuzsko A, Bollag R, Maihle N, Roig J, Korkaya H, Cowell JK, Chadli A. The co-chaperone UNC45A is essential for the expression of mitotic kinase NEK7 and tumorigenesis. J Biol Chem 2019; 294:5246-5260. [PMID: 30737284 DOI: 10.1074/jbc.ra118.006597] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [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: 11/06/2018] [Revised: 01/18/2019] [Indexed: 12/27/2022] Open
Abstract
Cumulative evidence suggests that the heat shock protein 90 (Hsp90) co-chaperone UNC-45 myosin chaperone A (UNC45A) contributes to tumorigenesis and that its expression in cancer cells correlates with proliferation and metastasis of solid tumors. However, the molecular mechanism by which UNC45A regulates cancer cell proliferation remains largely unknown. Here, using siRNA-mediated gene silencing and various human cells, we report that UNC45A is essential for breast cancer cell growth, but is dispensable for normal cell proliferation. Immunofluorescence microscopy, along with gene microarray and RT-quantitative PCR analyses, revealed that UNC45A localizes to the cancer cell nucleus, where it up-regulates the transcriptional activity of the glucocorticoid receptor and thereby promotes expression of the mitotic kinase NIMA-related kinase 7 (NEK7). We observed that UNC45A-deficient cancer cells exhibit extensive pericentrosomal material disorganization, as well as defects in centrosomal separation and mitotic chromosome alignment. Consequently, these cells stalled in metaphase and cytokinesis and ultimately underwent mitotic catastrophe, phenotypes that were rescued by heterologous NEK7 expression. Our results identify a key role for the co-chaperone UNC45A in cell proliferation and provide insight into the regulatory mechanism. We propose that UNC45A represents a promising new therapeutic target to inhibit cancer cell growth in solid tumor types.
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Affiliation(s)
- Nada H Eisa
- From the Georgia Cancer Center.,the Biochemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt 35516
| | | | | | | | - Su Lu
- From the Georgia Cancer Center
| | - Oulia Bougrine
- the Department of Pathology, Augusta University, CN-3151, Augusta, Georgia 30912
| | - Houssein Abdul Sater
- the Department of Pathology, Augusta University, CN-3151, Augusta, Georgia 30912
| | | | | | | | - Kebin Liu
- the Biochemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt 35516
| | - Nehal M Elsherbiny
- the Biochemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt 35516
| | - Laila A Eissa
- the Biochemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt 35516
| | - Mamdouh M El-Shishtawy
- the Biochemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt 35516
| | | | - Roni Bollag
- From the Georgia Cancer Center.,the Biochemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt 35516.,the Georgia Cancer Center Biorepository, Augusta University, Augusta, Georgia 30912, and
| | | | - Joan Roig
- the Institut de Biologia Molecular de Barcelona (IBMB-CSIC), Parc Científic de Barcelona, c/Baldiri i Reixac, 10-12, 08028 Barcelona, Spain
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Pinkerton DM, Chow S, Eisa NH, Kainth K, Vanden Berg TJ, Burns JM, Guddat LW, Savage GP, Chadli A, Williams CM. Synthesis of the seco-Limonoid BCD Ring System Identifies a Hsp90 Chaperon Machinery (p23) Inhibitor. Chemistry 2018; 25:1451-1455. [PMID: 30570197 DOI: 10.1002/chem.201805420] [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] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 11/23/2018] [Indexed: 01/06/2023]
Abstract
D-Ring-seco-limonoids (tetranortriterpenoids), such as gedunin and xylogranin B display anti-cancer activity, acting via inhibition of Hsp90 and/or associated chaperon machinery (e.g., p23). Despite this, these natural products have received relatively little attention, both in terms of an enabling synthetic approach (which would allow access to derivatives), and as a consequence their structure-activity relationship (SAR). Disclosed herein is a generally applicable synthetic route to the BCD ring system of the seco-D-ring double bond containing limonoids. Furthermore, cell based assays revealed the first skeletal fragment that exhibited inhibition of the p23 enzyme at a level which was equipotent to that of gedunin, despite being much less structurally complex.
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Affiliation(s)
- David M Pinkerton
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Queensland, Australia
| | - Sharon Chow
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Queensland, Australia
| | - Nada H Eisa
- Georgia Cancer Center, Molecular Oncology Program, Augusta University, Augusta, GA, 30912, USA.,Biochemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Kashish Kainth
- Georgia Cancer Center, Molecular Oncology Program, Augusta University, Augusta, GA, 30912, USA
| | - Timothy J Vanden Berg
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Queensland, Australia
| | - Jed M Burns
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Queensland, Australia
| | - Luke W Guddat
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Queensland, Australia
| | - G Paul Savage
- CSIRO Manufacturing, Ian Wark Laboratory, Melbourne, 3168, Victoria, Australia
| | - Ahmed Chadli
- Georgia Cancer Center, Molecular Oncology Program, Augusta University, Augusta, GA, 30912, USA
| | - Craig M Williams
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Queensland, Australia
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Fennoun H, El Aziz S, Mjabber A, Chadli A. Association hypertension artérielle et diabète : à propos de 385 cas (résultats préliminaires). Annales d'Endocrinologie 2018. [DOI: 10.1016/j.ando.2018.06.1062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Dedet J, Ben Osman F, Chadli A, Croset H, Rioux JA. La Leishmaniose canine en Tunisie. Fréquences actuelles de l’enzootie d’après une enquête séro-immunologique. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/parasite/1973485653] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Jilani Y, Eisa NH, Kainth K, Lu S, Elsherbiny NM, Eissa LA, Elshishtawy MM, Korkaya H, Andaloussi AE, Chadli A. Abstract 4493: The co-chaperone UNC45A controls cancer cell proliferation through Nek7 and centrosomal separation. Cancer Res 2017. [DOI: 10.1158/1538-7445.am2017-4493] [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
Recent findings have shown that the Heat Shock Protein 90 (Hsp90) co-chaperone UNC45A is overexpressed in ovarian and breast cancers. Previously, we have shown that UNC45A is a centrosomal protein essential for cervical tumor cell growth through activation of the checkpoint kinase 1 (ChK1). In this report, we further examined the role of UNC45A in breast tumorigenesis using a variety of biochemical and cell biology techniques and animal models. We confirmed that UNC45A is highly overexpressed in human breast-infiltrating ductal carcinomas as compared to adjacent normal tissues. Silencing UNC45A in vitro blocked the proliferation of all breast cancer subtypes and drastically reduced tumor growth of the triple negative MDA-MB-231 cell line implanted in mammary fat pads of NOD/SCID mice. However, loss of UNC45A did not affect the proliferation of normal mammary cells. Remarkably, UNC45A becomes more nuclear in human cancer tissues and cancer cell lines as compared to normal tissues and non-transformed Hs578Bst and HME mammary cell lines, respectively. This suggests an important nuclear function for UNC45A during tumorigenesis. Microarray analysis of mRNA from Hs578T cells showed that loss of UNC45A alters the expression of 121 genes, involved in cancer and cellular development and growth networks. Relevant to cell proliferation, we found that Nek7 gene was significantly repressed upon silencing UNC45A, which was validated by RTqPCR and Western blot analyses in multiple breast cancer cell lines. Nek7 is a member of the NIMA (never in mitosis, gene A) family of serine/threonine kinases. It plays a key role in centrosomal separation during mitosis. This correlates neatly with our observation that loss of UNC45A causes a centrosomal separation defect, cell proliferation arrest and death of breast cancer cell lines. ChIP experiments showed that UNC45A binds to the promoter of the Nek7 gene, suggesting direct transcriptional regulation. Interestingly, the UNC45A sequence contains four LxxLL motifs, which are thought to be signatures for co-activator binding to nuclear receptors. Furthermore, computational analysis identified two glucocorticoid response elements (GRE) consensus sequences in the Nek7 promoter, suggesting its transcriptional regulation by the glucocorticoid receptor (GR). This hypothesis was further strengthened by a significant decrease in the mRNA and protein levels of Nek7 upon silencing GR. Thus, our data suggest that UNC45A functions as a GR co-activator to control Nek7 gene transcription. Consistent with this, immunoprecipitation experiments confirmed that UNC45A and GR form endogenous complexes, and treatment of Hs578T and MCF7 cell lines with dexamethasone upregulates Nek7 mRNA and protein levels. In conclusion our data strongly support the premise that UNC45A promotes Nek7 transcription through activation of GR, and thus controls centrosomal separation and cancer cell proliferation.
Citation Format: Yasmeen Jilani, Nada H. Eisa, Kashish Kainth, Sumin Lu, Nehal M. Elsherbiny, Laila A. Eissa, Mamdouh M. Elshishtawy, Hasan Korkaya, Abdeljabar El Andaloussi, Ahmed Chadli. The co-chaperone UNC45A controls cancer cell proliferation through Nek7 and centrosomal separation [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2017; 2017 Apr 1-5; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2017;77(13 Suppl):Abstract nr 4493. doi:10.1158/1538-7445.AM2017-4493
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Affiliation(s)
| | - Nada H. Eisa
- 1Augusta University, Georgia Cancer Center, Augusta, GA
| | | | - Sumin Lu
- 2Augusta University, Augusta, GA
| | | | | | | | - Hasan Korkaya
- 1Augusta University, Georgia Cancer Center, Augusta, GA
| | | | - Ahmed Chadli
- 1Augusta University, Georgia Cancer Center, Augusta, GA
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Meddeb Z, Abdelkafi C, El Ouni A, Larbi T, Zaafouri H, Chadli A, Ben Maamar A, Bouslama K, Hamzaoui S, M’rad S. Péritonite encapsulante idiopathique de découverte opératoire révélée par une occlusion intestinale. Rev Med Interne 2016. [DOI: 10.1016/j.revmed.2016.10.278] [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: 10/20/2022]
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Chen F, Haigh S, Yu Y, Benson T, Wang Y, Li X, Dou H, Bagi Z, Verin AD, Stepp DW, Csanyi G, Chadli A, Weintraub NL, Smith SME, Fulton DJR. Nox5 stability and superoxide production is regulated by C-terminal binding of Hsp90 and CO-chaperones. Free Radic Biol Med 2015; 89:793-805. [PMID: 26456056 PMCID: PMC4751585 DOI: 10.1016/j.freeradbiomed.2015.09.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 08/15/2015] [Accepted: 09/03/2015] [Indexed: 10/22/2022]
Abstract
Heat shock protein 90 (Hsp90) is a molecular chaperone that orchestrates the folding and stability of proteins that regulate cellular signaling, proliferation and inflammation. We have previously shown that Hsp90 controls the production of reactive oxygen species by modulating the activity of Noxes1-3 and 5, but not Nox4. The goal of the current study was to define the regions on Nox5 that bind Hsp90 and determine how Hsp90 regulates enzyme activity. In isolated enzyme activity assays, we found that Hsp90 inhibitors selectively decrease superoxide, but not hydrogen peroxide, production. The addition of Hsp90 alone only modestly increases Nox5 enzyme activity but in combination with the co-chaperones, Hsp70, HOP, Hsp40, and p23 it robustly stimulated superoxide, but not hydrogen peroxide, production. Proximity ligation assays reveal that Nox5 and Hsp90 interact in intact cells. In cell lysates using a co-IP approach, Hsp90 binds to Nox5 but not Nox4, and the degree of binding can be influenced by calcium-dependent stimuli. Inhibition of Hsp90 induced the degradation of full length, catalytically inactive and a C-terminal fragment (aa398-719) of Nox5. In contrast, inhibition of Hsp90 did not affect the expression levels of N-terminal fragments (aa1-550) suggesting that Hsp90 binding maintains the stability of C-terminal regions. In Co-IP assays, Hsp90 was bound only to the C-terminal region of Nox5. Further refinement using deletion analysis revealed that the region between aa490-550 mediates Hsp90 binding. Converse mapping experiments show that the C-terminal region of Nox5 bound to the M domain of Hsp90 (aa310-529). In addition to Hsp90, Nox5 bound other components of the foldosome including co-chaperones Hsp70, HOP, p23 and Hsp40. Silencing of HOP, Hsp40 and p23 reduced Nox5-dependent superoxide. In contrast, increased expression of Hsp70 decreased Nox5 activity whereas a mutant of Hsp70 failed to do so. Inhibition of Hsp90 results in the loss of higher molecular weight complexes of Nox5 and decreased interaction between monomers. Collectively these results show that the C-terminal region of Nox5 binds to the M domain of Hsp90 and that the binding of Hsp90 and select co-chaperones facilitate oligomerization and the efficient production of superoxide.
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Affiliation(s)
- Feng Chen
- Department of Forensic Medicine, Nanjing Medical University, Nanjing, Jiangsu, 210029 China; Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA.
| | - Steven Haigh
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Yanfang Yu
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Tyler Benson
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Yusi Wang
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Xueyi Li
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Huijuan Dou
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Zsolt Bagi
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Alexander D Verin
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - David W Stepp
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Gabor Csanyi
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Ahmed Chadli
- Cancer Research Center, Molecular Chaperones Program, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Neal L Weintraub
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA
| | - Susan M E Smith
- Department of Molecular and Cellular Biology, Kennesaw State University, Kennesaw GA 30152, USA
| | - David J R Fulton
- Vascular Biology Center, Georgia Regents University, Augusta, Georgia 30912, USA.
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Dédjan AH, Chadli A, El Aziz S, Farouqi A. Hyperandrogenism-Insulin Resistance-Acanthosis Nigricans Syndrome. Case Rep Endocrinol 2015; 2015:193097. [PMID: 26229697 PMCID: PMC4503582 DOI: 10.1155/2015/193097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2014] [Revised: 04/20/2015] [Accepted: 05/05/2015] [Indexed: 12/27/2022] Open
Abstract
Introduction. Female hyperandrogenism is a frequent motive of consultation. It is revealed by hirsutism, acne or seborrhea, and disorders in menstruation cycle combined or not with virilisation signs. Several etiologies are incriminated but the hyperandrogenism-insulin resistance-acanthosis nigricans syndrome is rare. Observation. A 20-year-old girl, having had a five-year-old secondary amenorrhea. The exam revealed a patient, normotensive with a body mass index at 30 kg/m(2) and a waist measurement of 120 cm, a severe hirsutism assessed to be 29 according to Ferriman Gallwey scale, virilisation signs of male morphotype, clitoridic hypertrophy and frontal alopecia, and an acanthosis nigricans behind the neck, in the armpits and elbows. The assessment carried out revealed testosteronemia at 1.28 ng/mL, which is more than twice the upper norm of the laboratory. Imaging studies were negative for both ovarian and adrenal masses. The retained diagnosis is HAIR-AN syndrome probably related to ovarian hyperthecosis and she was provided with androcur 50 mg/day and estradiol pills 2 mg/day and under hygiene-dietetic conditions. Conclusion. This case proves that HAIR-AN syndrome could be responsible for severe hyperandrogenism with virilisation signs. It must be retained after discarding the tumoral causes and when there are signs of insulin resistance.
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Affiliation(s)
- A. H. Dédjan
- Endocrinology, Diabetology and Metabolic Diseases, Ibn Rochd University Hospital Center of Casablanca, 20360 Casablanca, Morocco
| | - A. Chadli
- Endocrinology, Diabetology and Metabolic Diseases, Ibn Rochd University Hospital Center of Casablanca, 20360 Casablanca, Morocco
| | - S. El Aziz
- Endocrinology, Diabetology and Metabolic Diseases, Ibn Rochd University Hospital Center of Casablanca, 20360 Casablanca, Morocco
| | - A. Farouqi
- Endocrinology, Diabetology and Metabolic Diseases, Ibn Rochd University Hospital Center of Casablanca, 20360 Casablanca, Morocco
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Kabbaj FZ, Lu S, Faouzi MEA, Meddah B, Proksch P, Cherrah Y, Altenbach HJ, Aly AH, Chadli A, Debbab A. Bioactive metabolites from Chaetomium aureum: structure elucidation and inhibition of the Hsp90 machine chaperoning activity. Bioorg Med Chem 2014; 23:126-31. [PMID: 25482429 DOI: 10.1016/j.bmc.2014.11.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [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: 07/11/2014] [Revised: 10/22/2014] [Accepted: 11/13/2014] [Indexed: 12/22/2022]
Abstract
Chemical investigation of the EtOAc extract of the fungus Chaetomium aureum, an endophyte of the Moroccan medicinal plant Thymelaea lythroides, afforded one new resorcinol derivative named chaetorcinol, together with five known metabolites. The structures of the isolated compounds were determined on the basis of one- and two-dimensional NMR spectroscopy and high-resolution mass spectrometry as well as by comparison with the literature. All compounds were tested for their activity towards the Hsp90 chaperoning machine in vitro using the progesterone receptor (PR) and rabbit reticulocyte lysate (RRL). Among the isolated compounds, only sclerotiorin efficiently inhibited the Hsp90 machine chaperoning activity. However, sclerotiorin showed no cytotoxic effect on breast cancer Hs578T, MDA-MB-231 and prostate cancer LNCaP cell lines. Interestingly, deacetylation of sclerotiorin increased its cytotoxicity toward the tested cell lines over a period of 48 h.
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Affiliation(s)
- Fatima Zahra Kabbaj
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, Building 26.23, 40225 Düsseldorf, Germany; Laboratory of Pharmacology and Toxicology, University Mohammed V Souissi, Rabat, Morocco; Department of Organic Chemistry, University of Wuppertal, Gaußstr. 20, 42097 Wuppertal, Germany
| | - Su Lu
- Cancer Research Center, Molecular Chaperones Biology, Georgia Regents University, 1410 Laney Walker Blvd, CN-3151, Augusta, GA 30912, United States
| | - My El Abbés Faouzi
- Laboratory of Pharmacology and Toxicology, University Mohammed V Souissi, Rabat, Morocco
| | - Bouchra Meddah
- Laboratory of Pharmacology and Toxicology, University Mohammed V Souissi, Rabat, Morocco
| | - Peter Proksch
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, Building 26.23, 40225 Düsseldorf, Germany
| | - Yahya Cherrah
- Laboratory of Pharmacology and Toxicology, University Mohammed V Souissi, Rabat, Morocco
| | - Hans-Josef Altenbach
- Department of Organic Chemistry, University of Wuppertal, Gaußstr. 20, 42097 Wuppertal, Germany
| | - Amal H Aly
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, Building 26.23, 40225 Düsseldorf, Germany
| | - Ahmed Chadli
- Cancer Research Center, Molecular Chaperones Biology, Georgia Regents University, 1410 Laney Walker Blvd, CN-3151, Augusta, GA 30912, United States.
| | - Abdessamad Debbab
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, Building 26.23, 40225 Düsseldorf, Germany.
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Jilani Y, Lu S, Lei H, Karnitz LM, Chadli A. UNC45A localizes to centrosomes and regulates cancer cell proliferation through ChK1 activation. Cancer Lett 2014; 357:114-120. [PMID: 25444911 DOI: 10.1016/j.canlet.2014.11.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [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: 09/17/2014] [Revised: 11/05/2014] [Accepted: 11/06/2014] [Indexed: 11/26/2022]
Abstract
The UCS family of proteins regulates cellular functions through their interactions with myosin. Here we show that one member of this family, UNC45A, is also a novel centrosomal protein. UNC45A is required for cellular proliferation of cancer cell in vitro and for tumor growth in vivo through its ability to bind and regulate ChK1 nuclear-cytoplasmic localization in an Hsp90-independent manner. Immunocytochemical and biochemical fractionation studies revealed that UNC45A and ChK1 co-localize to the centrosome. Inhibition of UNC45A expression reduced ChK1 activation and its tethering to the centrosome, events required for proper centrosome function. Lack of UNC45A caused the accumulation of multi-nucleated cells, consistent with a defect in Chk1 regulation of centrosomes. These findings identify a novel centrosomal function for UNC45A and its role in cell proliferation and tumorigenesis.
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Affiliation(s)
- Yasmeen Jilani
- Molecular Oncology and Biomarkers Program, GRU Cancer Center, Georgia Regents University, 1410 Laney Walker Blvd, CN-3151, Augusta, GA 30912, USA
| | - Su Lu
- Molecular Oncology and Biomarkers Program, GRU Cancer Center, Georgia Regents University, 1410 Laney Walker Blvd, CN-3151, Augusta, GA 30912, USA
| | - Huang Lei
- Cancer Immunology, Inflammation, and Tolerance Program, Georgia Regents University Cancer Center, Medical College of Georgia, Georgia Regents University, Augusta, GA 30912
| | - Larry M Karnitz
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
| | - Ahmed Chadli
- Molecular Oncology and Biomarkers Program, GRU Cancer Center, Georgia Regents University, 1410 Laney Walker Blvd, CN-3151, Augusta, GA 30912, USA.
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Patwardhan CA, Peterson LB, Blagg B, Chadli A. Abstract 3197: Gedunin inactivates the co-chaperone p23 causing cancer cell death by apoptosis. Cancer Res 2014. [DOI: 10.1158/1538-7445.am2014-3197] [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
Pharmacological inhibition of Hsp90 is an exciting option for cancer therapy. The clinical efficacy of Hsp90 inhibitors is, however, less than expected. Binding of the co-chaperone p23 to Hsp90, and induced overexpression of anti-apoptotic proteins, Hsp70 and Hsp27, are thought to contribute to this outcome. Herein, we report that the natural product, gedunin, may provide a new alternative to inactivate the Hsp90 machine. We show that gedunin directly binds to p23 and inactivates it, without overexpression of Hsp27 and relatively modest induction of Hsp70. Using molecular docking and mutational analysis, we mapped the gedunin-binding site on p23. Functional analysis shows that gedunin inhibits p23 chaperoning activity, blocks its cellular interaction with Hsp90 and interferes with p23-mediated gene regulation. Cell treatment with gedunin leads to cancer cell death by apoptosis through inactivation of p23 and activation of caspase 7, which cleaves p23 at the C-terminus. These results provide important insight into the molecular mechanism of action of this promising lead compound.
Citation Format: Chaitanya A. Patwardhan, Laura B. Peterson, Brian Blagg, Ahmed Chadli. Gedunin inactivates the co-chaperone p23 causing cancer cell death by apoptosis. [abstract]. In: Proceedings of the 105th Annual Meeting of the American Association for Cancer Research; 2014 Apr 5-9; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2014;74(19 Suppl):Abstract nr 3197. doi:10.1158/1538-7445.AM2014-3197
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Patwardhan CA, Alfa E, Lu S, Chadli A. Progesterone receptor chaperone complex-based high-throughput screening assay: identification of capsaicin as an inhibitor of the Hsp90 machine. ACTA ACUST UNITED AC 2014; 20:223-9. [PMID: 25184514 DOI: 10.1177/1087057114549147] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [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: 11/16/2022]
Abstract
Hsp90 and its co-chaperones are known to be important for cancer cell survival. The N-terminal inhibitors of Hsp90 that are in ongoing clinical trials as antitumor agents have unfortunately shown disappointing efficacies in the clinic. Thus, novel inhibitors of the Hsp90 machine with a different mechanism of action are urgently needed. We report here the development of a novel high-throughput screening assay platform to identify small-molecule inhibitors of Hsp90 and its co-chaperones. This assay quantitatively measures the ability of Hsp90 and its co-chaperones to refold/protect the progesterone receptor, a physiological client of Hsp90, in a 96-well plate format. We screened the National Institutes of Health clinical collection drug library and identified capsaicin as a hit molecule. Capsaicin is a Food and Drug Administration-approved drug for topical use in pain management. Cell survival assays showed that capsaicin selectively kills cancer cells and destabilizes several Hsp90 client proteins. Thus, our data may explain the seemingly pleotropic effect of capsaicin.
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Affiliation(s)
- Chaitanya A Patwardhan
- GRU Cancer Center, Molecular Chaperones Group, Georgia Regents University, Augusta, GA, USA
| | - Eyad Alfa
- GRU Cancer Center, Molecular Chaperones Group, Georgia Regents University, Augusta, GA, USA
| | - Su Lu
- GRU Cancer Center, Molecular Chaperones Group, Georgia Regents University, Augusta, GA, USA
| | - Ahmed Chadli
- GRU Cancer Center, Molecular Chaperones Group, Georgia Regents University, Augusta, GA, USA
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Pye C, Elsherbiny NM, Ibrahim AS, Liou GI, Chadli A, Al-Shabrawey M, Elmarakby AA. Adenosine kinase inhibition protects the kidney against streptozotocin-induced diabetes through anti-inflammatory and anti-oxidant mechanisms. Pharmacol Res 2014; 85:45-54. [PMID: 24841126 DOI: 10.1016/j.phrs.2014.05.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 05/07/2014] [Accepted: 05/08/2014] [Indexed: 12/11/2022]
Abstract
Adenosine provides anti-inflammatory effects in cardiovascular disease via the activation of adenosine A2A receptors; however, the physiological effect of adenosine could be limited due to its phosphorylation by adenosine kinase. We hypothesized that inhibition of adenosine kinase exacerbates extracellular adenosine levels to reduce renal inflammation and injury in streptozotocin-induced diabetes. Diabetes was induced in male C57BL/6 mice by daily injection of streptozotocin (50mg/kg/day, i.p. for 5 days). Control and diabetic mice were then treated with the adenosine kinase inhibitor ABT702 (1.5mg/kg, i.p. two times a week for 8 weeks, n=7-8/group) or the vehicle (5% DMSO). ABT702 treatment reduced blood glucose level in diabetic mice (∼20%; P<0.05). ABT702 also reduced albuminuria and markers of glomerular injury, nephrinuria and podocalyxin excretion levels, in diabetic mice. Renal NADPH oxidase activity and urinary thiobarbituric acid reactive substances (TBARS) excretion, indices of oxidative stress, were also elevated in diabetic mice and ABT702 significantly reduced these changes. ABT702 increased renal endothelial nitric oxide synthase expression (eNOS) and nitrate/nitrite excretion levels in diabetic mice. In addition, the diabetic mice displayed an increase in renal macrophage infiltration, in association with increased renal NFκB activation. Importantly, treatment with ABT702 significantly reduced all these inflammatory parameters (P<0.05). Furthermore, ABT702 decreased glomerular permeability and inflammation and restored the decrease in glomerular occludin expression in vitro in high glucose treated human glomerular endothelial cells. Collectively, the results suggest that the reno-protective effects of ABT702 could be attributed to the reduction in renal inflammation and oxidative stress in diabetic mice.
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Affiliation(s)
- Chelsey Pye
- Department of Oral Biology, Georgia Regents University, Augusta, GA 30912, United States
| | - Nehal M Elsherbiny
- Department of Biochemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Ahmed S Ibrahim
- Department of Oral Biology, Georgia Regents University, Augusta, GA 30912, United States; Department of Biochemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Gregory I Liou
- Department of Ophthalmology, Georgia Regents University, Augusta, GA 30912, United States
| | - Ahmed Chadli
- Center for Molecular Chaperones/Radiobiology and Cancer Virology, Georgia Regents University, Augusta, GA 30912, United States
| | - Mohamed Al-Shabrawey
- Department of Oral Biology, Georgia Regents University, Augusta, GA 30912, United States
| | - Ahmed A Elmarakby
- Department of Oral Biology, Georgia Regents University, Augusta, GA 30912, United States; Department of Pharmacology & Toxicology, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt.
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Paul A, Garcia YA, Zierer B, Patwardhan C, Gutierrez O, Hildenbrand Z, Harris DC, Balsiger HA, Sivils JC, Johnson JL, Buchner J, Chadli A, Cox MB. The cochaperone SGTA (small glutamine-rich tetratricopeptide repeat-containing protein alpha) demonstrates regulatory specificity for the androgen, glucocorticoid, and progesterone receptors. J Biol Chem 2014; 289:15297-308. [PMID: 24753260 DOI: 10.1074/jbc.m113.535229] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [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: 11/06/2022] Open
Abstract
Steroid hormone receptors are ligand-dependent transcription factors that require the ordered assembly of multichaperone complexes for transcriptional activity. Although heat shock protein (Hsp) 90 and Hsp70 are key players in this process, multiple Hsp70- and Hsp90-associated cochaperones associate with receptor-chaperone complexes to regulate receptor folding and activation. Small glutamine-rich tetratricopeptide repeat-containing protein alpha (SGTA) was recently characterized as an Hsp70 and Hsp90-associated cochaperone that specifically regulates androgen receptor activity. However, the specificity of SGTA for additional members of the steroid hormone receptor superfamily and the mechanism by which SGTA regulates receptor activity remain unclear. Here we report that SGTA associates with and specifically regulates the androgen, glucocorticoid, and progesterone receptors and has no effect on the mineralocorticoid and estrogen receptors in both yeast and mammalian cell-based reporter assays. In both systems, SGTA knockdown/deletion enhances receptor activity, whereas SGTA overexpression suppresses receptor activity. We demonstrate that SGTA binds directly to Hsp70 and Hsp90 in vitro with similar affinities yet predominately precipitates with Hsp70 from cell lysates, suggesting a role for SGTA in early, Hsp70-mediated folding. Furthermore, SGTA expression completely abrogates the regulation of receptor function by FKBP52 (52-kDa FK506-binding protein), which acts at a later stage of the chaperone cycle. Taken together, our data suggest a role for SGTA at distinct steps in the chaperone-dependent modulation of androgen, glucocorticoid, and progesterone receptor activity.
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Affiliation(s)
- Atanu Paul
- From the Border Biomedical Research Center and Department of Biological Sciences and
| | - Yenni A Garcia
- From the Border Biomedical Research Center and Department of Biological Sciences and
| | - Bettina Zierer
- the Center for Integrated Protein Science at the Department Chemie, Technische Universität München, Garching, Germany
| | - Chaitanya Patwardhan
- the Cancer Research Center, Georgia Regents University, Augusta, Georgia 30912, and
| | - Omar Gutierrez
- From the Border Biomedical Research Center and Department of Biological Sciences and
| | - Zacariah Hildenbrand
- the Department of Chemistry, University of Texas at El Paso, El Paso, Texas 79968
| | - Diondra C Harris
- From the Border Biomedical Research Center and Department of Biological Sciences and
| | - Heather A Balsiger
- From the Border Biomedical Research Center and Department of Biological Sciences and
| | - Jeffrey C Sivils
- From the Border Biomedical Research Center and Department of Biological Sciences and
| | - Jill L Johnson
- the Department of Biological Sciences, University of Idaho, Moscow, Idaho 83844
| | - Johannes Buchner
- the Center for Integrated Protein Science at the Department Chemie, Technische Universität München, Garching, Germany
| | - Ahmed Chadli
- the Cancer Research Center, Georgia Regents University, Augusta, Georgia 30912, and
| | - Marc B Cox
- From the Border Biomedical Research Center and Department of Biological Sciences and
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Okoye FBC, Lu S, Nworu CS, Esimone CO, Proksch P, Chadli A, Debbab A. Depsidone and diaryl ether derivatives from the fungus Corynespora cassiicola, an endophyte of Gongronema latifolium. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.05.117] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Patwardhan CA, Fauq A, Peterson LB, Miller C, Blagg BSJ, Chadli A. Gedunin inactivates the co-chaperone p23 protein causing cancer cell death by apoptosis. J Biol Chem 2013; 288:7313-25. [PMID: 23355466 DOI: 10.1074/jbc.m112.427328] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Pharmacological inhibition of Hsp90 is an exciting option for cancer therapy. The clinical efficacy of Hsp90 inhibitors is, however, less than expected. Binding of the co-chaperone p23 to Hsp90 and induced overexpression of anti-apoptotic proteins Hsp70 and Hsp27 are thought to contribute to this outcome. Herein, we report that the natural product gedunin may provide a new alternative to inactivate the Hsp90 machine. We show that gedunin directly binds to p23 and inactivates it, without overexpression of Hsp27 and relatively modest induction of Hsp70. Using molecular docking and mutational analysis, we mapped the gedunin-binding site on p23. Functional analysis shows that gedunin inhibits the p23 chaperoning activity, blocks its cellular interaction with Hsp90, and interferes with p23-mediated gene regulation. Cell treatment with gedunin leads to cancer cell death by apoptosis through inactivation of p23 and activation of caspase 7, which cleaves p23 at the C terminus. These results provide important insight into the molecular mechanism of action of this promising lead compound.
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Affiliation(s)
- Chaitanya A Patwardhan
- Cancer Research Center, Molecular Chaperones Program, Georgia Regents University, Augusta, Georgia 30912, USA
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Chen F, Yu Y, Qian J, Wang Y, Cheng B, Dimitropoulou C, Patel V, Chadli A, Rudic RD, Stepp DW, Catravas JD, Fulton DJR. Opposing actions of heat shock protein 90 and 70 regulate nicotinamide adenine dinucleotide phosphate oxidase stability and reactive oxygen species production. Arterioscler Thromb Vasc Biol 2012; 32:2989-99. [PMID: 23023377 DOI: 10.1161/atvbaha.112.300361] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVE Excessive reactive oxygen species contribute to vascular dysfunction. We have previously shown that heat shock protein (Hsp90) inhibitors potently suppress Nox 1 to 3 and 5, and the goals of this study were to identify how molecular chaperones regulate Nox function. METHODS AND RESULTS In vitro, protein expression of Nox 1 to 2, 5 was decreased by Hsp90 inhibitors in multiple cell types (human pulmonary artery endothelial cells, neutrophils, macrophages, and human saphenous vein). In mice treated with Hsp90 inhibitors, Nox1 expression was reduced in lung along with reduced reactive oxygen species from leukocytes. Elevated reactive oxygen species production in obese (db/db) aorta was suppressed by Hsp90 inhibition. Hsp90 inhibitors did not alter Nox5 micro RNA levels, and proteasome inhibition prevented Nox2 and 5 protein degradation and increased ubiquitin incorporation. Inhibition of Hsp90 upregulated the expression of Hsp70 and Hsp70-bound Nox2, 5 and promoted degradation. Silencing Hsp70 prevented Hsp90 inhibitor-mediated degradation of Nox5. The Hsp70-regulated ubiquitin ligase, carboxyl terminus of Hsp70-interacting protein (CHIP), also bound Nox5 and promoted increased Nox5 ubiquitination and degradation. The chaperone binding and ubiquitination domains of CHIP were required, and the silencing of CHIP blunted Hsp90 inhibitor-mediated degradation of Nox2 and 5. CONCLUSIONS We conclude that Hsp90 binds to and regulates Nox protein stability. These actions are opposed by Hsp70 and CHIP, which promote the ubiquitination and degradation of Nox proteins and reduce reactive oxygen species production.
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Affiliation(s)
- Feng Chen
- Vascular Biology Center, Georgia Health Sciences University, Augusta, Georgia 30912, USA
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Chen F, Pandey D, Chadli A, Catravas JD, Chen T, Fulton DJR. Hsp90 regulates NADPH oxidase activity and is necessary for superoxide but not hydrogen peroxide production. Antioxid Redox Signal 2011; 14:2107-19. [PMID: 21194376 PMCID: PMC3085945 DOI: 10.1089/ars.2010.3669] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The goal of this study was to identify whether heat-shock protein 90 (Hsp90) regulates the production of superoxide and other reactive oxygen species from the NADPH oxidases (Nox). We found that pharmacological and genetic inhibition of Hsp90 directly reduced Nox5-derived superoxide without secondarily modifying signaling events. Coimmunoprecipitation and bioluminescence resonance energy transfer studies suggest that the C-terminus of Nox5 binds to Hsp90. Long-term Hsp90 inhibition reduced Nox5 expression and provides further evidence that Nox5 is an Hsp90 client protein. Inhibitors of Hsp90 also reduced superoxide from Nox1, Nox2 (neutrophils), and Nox3. However, Nox4, which emits only hydrogen peroxide, was unaffected by Hsp90 inhibitors. Hydrogen peroxide production from the other Nox enzymes was not affected by short-term inhibition of Hsp90, but long-term inhibition reduced production of all reactive oxygen species coincident with loss of enzyme expression. Expression of chimeric Nox enzymes consisting of N-terminal Nox1 or Nox3 and C-terminal Nox4 resulted in only hydrogen peroxide formation that was insensitive to Hsp90 inhibitors. We conclude that Hsp90 binds to the C-terminus of Noxes1-3 and 5 and is necessary for enzyme stability and superoxide production. Hsp90 does not bind to the C-terminus of Nox4 and is not required for hydrogen peroxide formation.
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Affiliation(s)
- Feng Chen
- Department of Forensic Sciences, Xi'an Jiaotong University School of Medicine, Xi'an Shaanxi, P.R. China
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Chadli A, Felts SJ, Wang Q, Sullivan WP, Botuyan MV, Fauq A, Ramirez-Alvarado M, Mer G. Celastrol inhibits Hsp90 chaperoning of steroid receptors by inducing fibrillization of the Co-chaperone p23. J Biol Chem 2009; 285:4224-4231. [PMID: 19996313 DOI: 10.1074/jbc.m109.081018] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Hsp90 is an ATP-dependent molecular chaperone. The best characterized inhibitors of Hsp90 target its ATP binding pocket, causing nonselective degradation of Hsp90 client proteins. Here, we show that the small molecule celastrol inhibits the Hsp90 chaperoning machinery by inactivating the co-chaperone p23, resulting in a more selective destabilization of steroid receptors compared with kinase clients. Our in vitro and in vivo results demonstrate that celastrol disrupts p23 function by altering its three-dimensional structure, leading to rapid formation of amyloid-like fibrils. This study reveals a unique inhibition mechanism of p23 by a small molecule that could be exploited in the dissection of protein fibrillization processes as well as in the therapeutics of steroid receptor-dependent diseases.
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Affiliation(s)
- Ahmed Chadli
- From the Center for Molecular Chaperone Radiobiology and Cancer Virology, Medical College of Georgia, Augusta, Georgia 30912.
| | - Sara J Felts
- the Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, and
| | - Qin Wang
- From the Center for Molecular Chaperone Radiobiology and Cancer Virology, Medical College of Georgia, Augusta, Georgia 30912
| | - William P Sullivan
- the Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, and
| | - Maria Victoria Botuyan
- the Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, and
| | - Abdul Fauq
- the Organic Chemistry Laboratory, Mayo Clinic College of Medicine, Jacksonville, Florida 32224
| | - Marina Ramirez-Alvarado
- the Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, and
| | - Georges Mer
- the Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, and
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Abstract
Hsp90 is an essential molecular chaperone required for the normal functioning of many key regulatory proteins in eukaryotic cells. Vertebrates have two closely related isoforms of cytosolic Hsp90 (Hsp90alpha and Hsp90beta). However, specific functions for each isoform are largely unknown, and no Hsp90 co-chaperone has been reported to distinguish between the two isoforms. In this study, we show that the Hsp90 co-chaperone GCUNC45 bound preferentially to the beta isoform of Hsp90 in vitro. GCUNC45 efficiently blocked the progression of progesterone receptor chaperoning in an in vitro functional system when Hsp90beta was used, but did so with much less efficacy when Hsp90alpha was used. Knockdown experiments in HeLa cells showed that GCUNC45 is required for the normal cellular distribution of Hsp90beta, but not Hsp90alpha. This is the first example of a co-chaperone with isoform selectivity, and this approach may open novel avenues to understanding the functional differences between Hsp90 isoforms.
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Affiliation(s)
- Ahmed Chadli
- Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, 200 First Street SW, Rochester, MN 55905, USA.
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