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Yuan X, Hao X, Chan HL, Zhao N, Pedroza DA, Liu F, Le K, Smith AJ, Calderon SJ, Lieu N, Soth MJ, Jones P, Zhang XHF, Rosen JM. CBP/P300 BRD Inhibition Reduces Neutrophil Accumulation and Activates Antitumor Immunity in TNBC. bioRxiv 2024:2024.04.25.590983. [PMID: 38712292 PMCID: PMC11071628 DOI: 10.1101/2024.04.25.590983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Tumor-associated neutrophils (TANs) have been shown to promote immunosuppression and tumor progression, and a high TAN frequency predicts poor prognosis in triple-negative breast cancer (TNBC). Dysregulation of CREB binding protein (CBP)/P300 function has been observed with multiple cancer types. The bromodomain (BRD) of CBP/P300 has been shown to regulate its activity. In this study, we found that IACS-70654, a novel and selective CBP/P300 BRD inhibitor, reduced TANs and inhibited the growth of neutrophil-enriched TNBC models. In the bone marrow, CBP/P300 BRD inhibition reduced the tumor-driven abnormal differentiation and proliferation of neutrophil progenitors. Inhibition of CBP/P300 BRD also stimulated the immune response by inducing an IFN response and MHCI expression in tumor cells and increasing tumor-infiltrated CTLs. Moreover, IACS-70654 improved the response of a neutrophil-enriched TNBC model to docetaxel and immune checkpoint blockade. This provides a rationale for combining a CBP/P300 BRD inhibitor with standard-of-care therapies in future clinical trials for neutrophil-enriched TNBC. Summary In neutrophil-enriched triple-negative breast cancer (TNBC) models, CREB binding protein (CBP)/P300 bromodomain (BRD) inhibition reduces tumor growth and systemic neutrophil accumulation while stimulating an antitumor immune response. This improves standard-of-care therapies, suggesting a potential therapeutic benefit of CBP/P300 BRD inhibitors for neutrophil-enriched TNBC.
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Le K, Soth MJ, Cross JB, Liu G, Ray WJ, Ma J, Goodwani SG, Acton PJ, Buggia-Prevot V, Akkermans O, Barker J, Conner ML, Jiang Y, Liu Z, McEwan P, Warner-Schmidt J, Xu A, Zebisch M, Heijnen CJ, Abrahams B, Jones P. Discovery of IACS-52825, a Potent and Selective DLK Inhibitor for Treatment of Chemotherapy-Induced Peripheral Neuropathy. J Med Chem 2023. [PMID: 37436942 DOI: 10.1021/acs.jmedchem.3c00788] [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: 07/14/2023]
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is a major unmet medical need with limited treatment options. Despite different mechanisms of action, diverse chemotherapeutics can cause CIPN through a converged pathway─an active axon degeneration program that engages the dual leucine zipper kinase (DLK). DLK is a neuronally enriched kinase upstream in the MAPK-JNK cascade, and while it is dormant under physiological conditions, DLK mediates a core mechanism for neuronal injury response under stress conditions, making it an attractive target for treatment of neuronal injury and neurodegenerative diseases. We have developed potent, selective, brain penetrant DLK inhibitors with excellent PK and activity in mouse models of CIPN. Lead compound IACS-52825 (22) showed strongly effective reversal of mechanical allodynia in a mouse model of CIPN and was advanced into preclinical development.
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Affiliation(s)
- Kang Le
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77054, United States
| | - Michael J Soth
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77054, United States
| | - Jason B Cross
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77054, United States
| | - Gang Liu
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77054, United States
| | - William J Ray
- Neurodegenerative Consortium (NDC), The University of Texas MD Anderson Cancer Center, Houston, Texas 77054, United States
| | - Jiacheng Ma
- Neurodegenerative Consortium (NDC), The University of Texas MD Anderson Cancer Center, Houston, Texas 77054, United States
| | - Sunil G Goodwani
- Neurodegenerative Consortium (NDC), The University of Texas MD Anderson Cancer Center, Houston, Texas 77054, United States
| | - Paul J Acton
- Neurodegenerative Consortium (NDC), The University of Texas MD Anderson Cancer Center, Houston, Texas 77054, United States
| | - Virginie Buggia-Prevot
- Neurodegenerative Consortium (NDC), The University of Texas MD Anderson Cancer Center, Houston, Texas 77054, United States
| | | | | | - Michael L Conner
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77054, United States
| | - Yongying Jiang
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77054, United States
| | - Zhen Liu
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77054, United States
| | | | - Jennifer Warner-Schmidt
- Alexandria Center for Life Science, Magnolia Neurosciences Corporation, New York, New York 10016, United States
| | - Alan Xu
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77054, United States
| | | | - Cobi J Heijnen
- Laboratories of Neuroimmunology, Department of Symptom Research, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
- Department of Psychological Sciences, Rice University, Houston, Texas 77005, United States
| | - Brett Abrahams
- Alexandria Center for Life Science, Magnolia Neurosciences Corporation, New York, New York 10016, United States
| | - Philip Jones
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77054, United States
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3
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Fiskus W, Mill CP, Birdwell C, Davis JA, Das K, Boettcher S, Kadia TM, DiNardo CD, Takahashi K, Loghavi S, Soth MJ, Heffernan T, McGeehan GM, Ruan X, Su X, Vakoc CR, Daver N, Bhalla KN. Targeting of epigenetic co-dependencies enhances anti-AML efficacy of Menin inhibitor in AML with MLL1-r or mutant NPM1. Blood Cancer J 2023; 13:53. [PMID: 37055414 PMCID: PMC10102188 DOI: 10.1038/s41408-023-00826-6] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/29/2023] [Accepted: 04/03/2023] [Indexed: 04/15/2023] Open
Abstract
Monotherapy with Menin inhibitor (MI), e.g., SNDX-5613, induces clinical remissions in patients with relapsed/refractory AML harboring MLL1-r or mtNPM1, but most patients either fail to respond or eventually relapse. Utilizing single-cell RNA-Seq, ChiP-Seq, ATAC-Seq, RNA-Seq, RPPA, and mass cytometry (CyTOF) analyses, present pre-clinical studies elucidate gene-expression correlates of MI efficacy in AML cells harboring MLL1-r or mtNPM1. Notably, MI-mediated genome-wide, concordant, log2 fold-perturbations in ATAC-Seq and RNA-Seq peaks were observed at the loci of MLL-FP target genes, with upregulation of mRNAs associated with AML differentiation. MI treatment also reduced the number of AML cells expressing the stem/progenitor cell signature. A protein domain-focused CRISPR-Cas9 screen in MLL1-r AML cells identified targetable co-dependencies with MI treatment, including BRD4, EP300, MOZ and KDM1A. Consistent with this, in vitro co-treatment with MI and BET, MOZ, LSD1 or CBP/p300 inhibitor induced synergistic loss of viability of AML cells with MLL1-r or mtNPM1. Co-treatment with MI and BET or CBP/p300 inhibitor also exerted significantly superior in vivo efficacy in xenograft models of AML with MLL1-r. These findings highlight novel, MI-based combinations that could prevent escape of AML stem/progenitor cells following MI monotherapy, which is responsible for therapy-refractory AML relapse.
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Affiliation(s)
- Warren Fiskus
- The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | | | | | - John A Davis
- The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Kaberi Das
- The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Steffen Boettcher
- University of Zurich and University Hospital Zurich, CH-8091, Zurich, Switzerland
| | - Tapan M Kadia
- The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | | | - Koichi Takahashi
- The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Sanam Loghavi
- The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Michael J Soth
- The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Tim Heffernan
- The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | | | - Xinjia Ruan
- The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Xiaoping Su
- The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | | | - Naval Daver
- The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Kapil N Bhalla
- The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
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4
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Ma J, Goodwani S, Acton PJ, Buggia-Prevot V, Kesler SR, Jamal I, Mahant ID, Liu Z, Mseeh F, Roth BL, Chakraborty C, Peng B, Wu Q, Jiang Y, Le K, Soth MJ, Jones P, Kavelaars A, Ray WJ, Heijnen CJ. Inhibition of dual leucine zipper kinase prevents chemotherapy-induced peripheral neuropathy and cognitive impairments. Pain 2021; 162:2599-2612. [PMID: 33872235 PMCID: PMC8442742 DOI: 10.1097/j.pain.0000000000002256] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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] [Received: 08/10/2020] [Revised: 01/15/2021] [Accepted: 01/26/2021] [Indexed: 11/26/2022]
Abstract
ABSTRACT Chemotherapy-induced peripheral neuropathy (CIPN) and chemotherapy-induced cognitive impairments (CICI) are common, often severe neurotoxic side effects of cancer treatment that greatly reduce quality of life of cancer patients and survivors. Currently, there are no Food and Drug Administration-approved agents for the prevention or curative treatment of CIPN or CICI. The dual leucine zipper kinase (DLK) is a key mediator of axonal degeneration that is localized to axons and coordinates the neuronal response to injury. We developed a novel brain-penetrant DLK inhibitor, IACS'8287, which demonstrates potent and highly selective inhibition of DLK in vitro and in vivo. Coadministration of IACS'8287 with the platinum derivative cisplatin prevents mechanical allodynia, loss of intraepidermal nerve fibers in the hind paws, cognitive deficits, and impairments in brain connectivity in mice, all without interfering with the antitumor activity of cisplatin. The protective effects of IACS'8287 are associated with preservation of mitochondrial function in dorsal root ganglion neurons and in brain synaptosomes. In addition, RNA sequencing analysis of dorsal root ganglia reveals modulation of genes involved in neuronal activity and markers for immune cell infiltration by DLK inhibition. These data indicate that CIPN and CICI require DLK signaling in mice, and DLK inhibitors could become an attractive treatment in the clinic when coadministered with cisplatin, and potentially other chemotherapeutic agents, to prevent neurotoxicities as a result of cancer treatment.
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Affiliation(s)
- Jiacheng Ma
- The Neurodegeneration Consortium, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
- Laboratories of Neuroimmunology, Department of Symptom Research, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Sunil Goodwani
- The Neurodegeneration Consortium, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Paul J. Acton
- The Neurodegeneration Consortium, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Virginie Buggia-Prevot
- The Neurodegeneration Consortium, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Shelli R. Kesler
- Cancer Neuroscience Lab, School of Nursing, Department of Diagnostic Medicine, LIVESTRONG Cancer Institutes, University of Texas at Austin, Austin, TX, United States
| | - Imran Jamal
- Laboratories of Neuroimmunology, Department of Symptom Research, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Iteeben D. Mahant
- Laboratories of Neuroimmunology, Department of Symptom Research, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Zhen Liu
- Institute for Applied Cancer Science, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Faika Mseeh
- Institute for Applied Cancer Science, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Bruce L. Roth
- The Neurodegeneration Consortium, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Chaitali Chakraborty
- The Neurodegeneration Consortium, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Bo Peng
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Qi Wu
- Institute for Applied Cancer Science, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Yongying Jiang
- Institute for Applied Cancer Science, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Kang Le
- Institute for Applied Cancer Science, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Michael J. Soth
- Institute for Applied Cancer Science, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Philip Jones
- Institute for Applied Cancer Science, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Annemieke Kavelaars
- Laboratories of Neuroimmunology, Department of Symptom Research, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - William J. Ray
- The Neurodegeneration Consortium, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Cobi J. Heijnen
- Laboratories of Neuroimmunology, Department of Symptom Research, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
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5
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Hamilton MM, Mseeh F, McAfoos TJ, Leonard PG, Reyna NJ, Harris AL, Xu A, Han M, Soth MJ, Czako B, Theroff JP, Mandal PK, Burke JP, Virgin-Downey B, Petrocchi A, Pfaffinger D, Rogers NE, Parker CA, Yu SS, Jiang Y, Krapp S, Lammens A, Trevitt G, Tremblay MR, Mikule K, Wilcoxen K, Cross JB, Jones P, Marszalek JR, Lewis RT. Discovery of IACS-9779 and IACS-70465 as Potent Inhibitors Targeting Indoleamine 2,3-Dioxygenase 1 (IDO1) Apoenzyme. J Med Chem 2021; 64:11302-11329. [PMID: 34292726 DOI: 10.1021/acs.jmedchem.1c00679] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Indoleamine 2,3-dioxygenase 1 (IDO1), a heme-containing enzyme that mediates the rate-limiting step in the metabolism of l-tryptophan to kynurenine, has been widely explored as a potential immunotherapeutic target in oncology. We developed a class of inhibitors with a conformationally constrained bicyclo[3.1.0]hexane core. These potently inhibited IDO1 in a cellular context by binding to the apoenzyme, as elucidated by biochemical characterization and X-ray crystallography. A SKOV3 tumor model was instrumental in differentiating compounds, leading to the identification of IACS-9779 (62) and IACS-70465 (71). IACS-70465 has excellent cellular potency, a robust pharmacodynamic response, and in a human whole blood assay was more potent than linrodostat (BMS-986205). IACS-9779 with a predicted human efficacious once daily dose below 1 mg/kg to sustain >90% inhibition of IDO1 displayed an acceptable safety margin in rodent toxicology and dog cardiovascular studies to support advancement into preclinical safety evaluation for human development.
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Affiliation(s)
- Matthew M Hamilton
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Faika Mseeh
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Timothy J McAfoos
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Paul G Leonard
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Naphtali J Reyna
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Angela L Harris
- TRACTION (Translational Research to Advance Therapeutics and Innovation in Oncology), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Alan Xu
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Michelle Han
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Michael J Soth
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Barbara Czako
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Jay P Theroff
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Pijus K Mandal
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Jason P Burke
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Brett Virgin-Downey
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Alessia Petrocchi
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Dana Pfaffinger
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Norma E Rogers
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Connor A Parker
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Simon S Yu
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Yongying Jiang
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Stephan Krapp
- Proteros Biostructures GmbH, Bunsenstr. 7a, D-82152 Martinsried, Germany
| | - Alfred Lammens
- Proteros Biostructures GmbH, Bunsenstr. 7a, D-82152 Martinsried, Germany
| | - Graham Trevitt
- XenoGesis Ltd, BioCity Nottingham, Pennyfoot Street, Nottingham, Nottinghamshire NG1 1GF, U.K
| | - Martin R Tremblay
- Tesaro Inc., 1000 Winter Street, Waltham, Massachusetts 02451 United States
| | - Keith Mikule
- Tesaro Inc., 1000 Winter Street, Waltham, Massachusetts 02451 United States
| | - Keith Wilcoxen
- Tesaro Inc., 1000 Winter Street, Waltham, Massachusetts 02451 United States
| | - Jason B Cross
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Philip Jones
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Joseph R Marszalek
- TRACTION (Translational Research to Advance Therapeutics and Innovation in Oncology), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
| | - Richard T Lewis
- IACS (Institute for Applied Cancer Science), University of Texas, MD Anderson Cancer Center, 1881 East Road, Houston, Texas 77054, United States
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6
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Spencer ND, Bristow CA, Giulani V, Miller MA, Carugo A, Harris AL, Minelli R, Feng N, Chang Q, Soth MJ, Le K, Weinstein JN, Lorenzi PL, Liu J, Wang WL, Yap TA, Draetta G, Jones P, Heffernan TP, Kovacs JJ. Abstract 87: Asparagine synthetase (ASNS) expression predicts response to the GLS1 inhibitor IPN60090 in ovarian cancer through selective modulation of redox homeostasis. Cancer Res 2021. [DOI: 10.1158/1538-7445.am2021-87] [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
Inhibitors of tumor metabolism have shown promise in the pre-clinical and clinical settings, however success is likely dependent upon identification of responsive patient populations to drive maximum benefit. We have previously disclosed the development of the GLS1 inhibitor, IPN60090, which is currently progressing through Phase 1 studies (NCT03894540). Current efforts are focused on developing additional patient stratification biomarkers to define those patients who will most benefit from IPN60090 single-agent treatment or combination strategies. Here we demonstrate that IPN60090 elicited a specific set of metabolic alterations and selectively inhibited the growth of high grade serous ovarian cancer (HGSOC) models in vitro and in vivo. In IPN60090-sensitive OvCa cell lines, GLS1 inhibition induced glutathione (GSH) depletion, inhibited glutamine anapleurosis (GLN), and altered cell cycle kinetics resulting from depletion of intracellular nucleotide pools and accumulation of DNA damage. Untargeted metabolic profiling of IPN60090-sensitive and -insensitive cell lines revealed that the differential response was driven by the ability of insensitive cell lines to maintain intracellular pools of glutamate (GLU), and consequently GSH, through consumption of aspartate and alanine. We examined two transaminases whose activity may result in aspartate or alanine depletion in cells, asparagine synthetase (ASNS) and glutamate pyruvate transaminase 2 (GPT2), and found that ASNS expression predicted response to IPN60090. In vivo, growth of both subcutaneous and orthotopic ASNSlow OvCa tumors was inhibited by IPN60090, while ASNShigh tumors were resistant to IPN60090. Leveraging tissue microarrays from tumor biopsies collected at MD Anderson Cancer Center, we developed an IHC assay for ASNS to determine the percentage of ASNS null or low patients that would benefit from IPN60090 treatment. Upon validation and CLIA certification, this assay was deployed across archival patient biopsies collected in the Department of Investigational Cancer Therapeutics at MD Anderson Cancer Center, and identified patients who showed no ASNS staining (ASNSnull) in their tumors, suggesting that they may benefit from treatment with IPN60090. Taken together, through a comprehensive translational effort we have identified ASNS as a predictive biomarker of response to GLS1 inhibitor-based therapeutic regimens.
Citation Format: Nakia D. Spencer, Christopher A. Bristow, Virginia Giulani, Meredith A. Miller, Alessandro Carugo, Angela L. Harris, Rosalba Minelli, Ningpeng Feng, Qing Chang, Michael J. Soth, Kang Le, John N. Weinstein, Philip L. Lorenzi, Jinsong Liu, Wei-Lien Wang, Timothy A. Yap, Giulio Draetta, Philip Jones, Timothy P. Heffernan, Jeffrey J. Kovacs. Asparagine synthetase (ASNS) expression predicts response to the GLS1 inhibitor IPN60090 in ovarian cancer through selective modulation of redox homeostasis [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2021; 2021 Apr 10-15 and May 17-21. Philadelphia (PA): AACR; Cancer Res 2021;81(13_Suppl):Abstract nr 87.
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Affiliation(s)
| | | | | | | | | | | | - Rosalba Minelli
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Ningpeng Feng
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Qing Chang
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Michael J. Soth
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Kang Le
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | | | - Jinsong Liu
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Wei-Lien Wang
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Timothy A. Yap
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Giulio Draetta
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Philip Jones
- The University of Texas MD Anderson Cancer Center, Houston, TX
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7
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Suzuki E, Molina J, Spencer ND, Bristow CA, Harris AL, Feng N, Mahendra M, Gera S, Soth MJ, Le K, Yap TA, Draetta G, Jones P, Heffernan TP, Kovacs JJ. Abstract 2338: The GLS1 inhibitor IPN60090 enhances antitumor immune response through metabolic reprogramming of T cells and impacts on the tumor microenvironment. Cancer Res 2021. [DOI: 10.1158/1538-7445.am2021-2338] [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
Therapeutic agents targeting metabolism in the tumor microenvironment have been of increasing interest in recent years, however, the complexities of the interplay between tumor, stromal and immune cell interactions add complexity to these therapeutic approaches. We have previously disclosed the development of the GLS1 inhibitor, IPN60090, which is currently progressing through Phase 1 studies (NCT03894540) in multiple indication-specific biomarker-positive patient populations. In order to fully appreciate the opportunity to enhance IPN60090 activity in patients, we explored the impact of GLS1 inhibition on the activity of the immune system. Glutamine metabolism has been shown to play important and varied roles within the immune compartment including, but not limited to, roles in T-cell activation, T-cell effector functions and progression of exhaustion phenotypes. During T-cell activation, glutamine is utilized to drive activated T-cells towards a glycolytic phenotype. Eventually, activated T-cells exhaust and shift away from glycolysis towards fatty acid oxidation. Interestingly, it has been reported that the interaction of PD1 with PD-L1 blocks glutamine import and decreases glycolysis. Given these data, we hypothesized that inhibition of GLS1 with IPN60090 might enhance checkpoint blockade by increasing levels of glutamine in the tumor microenvironment, thus enhancing anti-tumor immune responses. In ex vivo culture systems, we show that IPN60090-mediated GLS1 inhibition increases the glycolytic activity of CD4+ and CD8+ T-cells, suggesting that GLS1 inhibition allows cells to maintain an energetically favorable phenotype. Furthermore, we show that IPN60090 enhances checkpoint blockade through cooperation with αPD1 therapy in two syngeneic mouse models which do not harbor predictive biomarkers of response to IPN60090 and which are refractory to checkpoint blockade. The observed synergy is due in part to IPN60090-dependent depletion of regulatory T-cells (Treg) and a concurrent increase in the CD8+ T-cell to Treg ratio in the tumor microenvironment. These data suggest that IPN60090 may show clinical benefit by enhancing immune response in the context of checkpoint blockade and have served as the justification for phase 1b trials in combination with Pembrolizumab which will enroll in 2021.
Citation Format: Erika Suzuki, Jennifer Molina, Nakia D. Spencer, Christopher A. Bristow, Angela L. Harris, Ningping Feng, Mikhila Mahendra, Sonal Gera, Michael J. Soth, Kang Le, Timothy A. Yap, Giulio Draetta, Philip Jones, Timothy P. Heffernan, Jeffrey J. Kovacs. The GLS1 inhibitor IPN60090 enhances antitumor immune response through metabolic reprogramming of T cells and impacts on the tumor microenvironment [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2021; 2021 Apr 10-15 and May 17-21. Philadelphia (PA): AACR; Cancer Res 2021;81(13_Suppl):Abstract nr 2338.
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Affiliation(s)
- Erika Suzuki
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Jennifer Molina
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | | | | | - Ningping Feng
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - Sonal Gera
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Michael J. Soth
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Kang Le
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Timothy A. Yap
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Giulio Draetta
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Philip Jones
- The University of Texas MD Anderson Cancer Center, Houston, TX
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Soth MJ, Le K, Di Francesco ME, Hamilton MM, Liu G, Burke JP, Carroll CL, Kovacs JJ, Bardenhagen JP, Bristow CA, Cardozo M, Czako B, de Stanchina E, Feng N, Garvey JR, Gay JP, Do MKG, Greer J, Han M, Harris A, Herrera Z, Huang S, Giuliani V, Jiang Y, Johnson SB, Johnson TA, Kang Z, Leonard PG, Liu Z, McAfoos T, Miller M, Morlacchi P, Mullinax RA, Palmer WS, Pang J, Rogers N, Rudin CM, Shepard HE, Spencer ND, Theroff J, Wu Q, Xu A, Yau JA, Draetta G, Toniatti C, Heffernan TP, Jones P. Discovery of IPN60090, a Clinical Stage Selective Glutaminase-1 (GLS-1) Inhibitor with Excellent Pharmacokinetic and Physicochemical Properties. J Med Chem 2020; 63:12957-12977. [PMID: 33118821 DOI: 10.1021/acs.jmedchem.0c01398] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Inhibition of glutaminase-1 (GLS-1) hampers the proliferation of tumor cells reliant on glutamine. Known glutaminase inhibitors have potential limitations, and in vivo exposures are potentially limited due to poor physicochemical properties. We initiated a GLS-1 inhibitor discovery program focused on optimizing physicochemical and pharmacokinetic properties, and have developed a new selective inhibitor, compound 27 (IPN60090), which is currently in phase 1 clinical trials. Compound 27 attains high oral exposures in preclinical species, with strong in vivo target engagement, and should robustly inhibit glutaminase in humans.
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Affiliation(s)
- Michael J Soth
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Kang Le
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Maria Emilia Di Francesco
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Matthew M Hamilton
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Gang Liu
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Jason P Burke
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Chris L Carroll
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Jeffrey J Kovacs
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Jennifer P Bardenhagen
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Christopher A Bristow
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Mario Cardozo
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Barbara Czako
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Elisa de Stanchina
- Antitumor Assessment Core Facility-Molecular Pharmacology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Ningping Feng
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Jill R Garvey
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Jason P Gay
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Mary K Geck Do
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Jennifer Greer
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Michelle Han
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Angela Harris
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Zachary Herrera
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Sha Huang
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Virginia Giuliani
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Yongying Jiang
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Sarah B Johnson
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Troy A Johnson
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Zhijun Kang
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Paul G Leonard
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Zhen Liu
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Timothy McAfoos
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Meredith Miller
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Pietro Morlacchi
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Robert A Mullinax
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Wylie S Palmer
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Jihai Pang
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Norma Rogers
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Charles M Rudin
- Drunkenmiller Center for Lung Cancer Research, Memorial Sloan Kettering Cancer Center, New York New York 10065, United States
| | - Hannah E Shepard
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Nakia D Spencer
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Jay Theroff
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Qi Wu
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Alan Xu
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Ju Anne Yau
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Giulio Draetta
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States.,Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Carlo Toniatti
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Timothy P Heffernan
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Philip Jones
- Institute for Applied Cancer Science (IACS), The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
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Goodwani S, Fernandez C, Acton PJ, Buggia-Prevot V, McReynolds ML, Ma J, Hu CH, Hamby ME, Jiang Y, Le K, Soth MJ, Jones P, Ray WJ. Dual Leucine Zipper Kinase Is Constitutively Active in the Adult Mouse Brain and Has Both Stress-Induced and Homeostatic Functions. Int J Mol Sci 2020; 21:ijms21144849. [PMID: 32659913 PMCID: PMC7402291 DOI: 10.3390/ijms21144849] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 07/04/2020] [Accepted: 07/07/2020] [Indexed: 01/15/2023] Open
Abstract
Dual leucine zipper kinase (DLK, Map3k12) is an axonal protein that governs the balance between degeneration and regeneration through its downstream effectors c-jun N-terminal kinase (JNK) and phosphorylated c-jun (p-c-Jun). In peripheral nerves DLK is generally inactive until induced by injury, after which it transmits signals to the nucleus via retrograde transport. Here we report that in contrast to this mode of regulation, in the uninjured adult mouse cerebellum, DLK constitutively drives nuclear p-c-Jun in cerebellar granule neurons, whereas in the forebrain, DLK is similarly expressed and active, but nuclear p-c-Jun is undetectable. When neurodegeneration results from mutant human tau in the rTg4510 mouse model, p-c-Jun then accumulates in neuronal nuclei in a DLK-dependent manner, and the extent of p-c-Jun correlates with markers of synaptic loss and gliosis. This regional difference in DLK-dependent nuclear p-c-Jun accumulation could relate to differing levels of JNK scaffolding proteins, as the cerebellum preferentially expresses JNK-interacting protein-1 (JIP-1), whereas the forebrain contains more JIP-3 and plenty of SH3 (POSH). To characterize the functional differences between constitutive- versus injury-induced DLK signaling, RNA sequencing was performed after DLK inhibition in the cerebellum and in the non-transgenic and rTg4510 forebrain. In all contexts, DLK inhibition reduced a core set of transcripts that are associated with the JNK pathway. Non-transgenic forebrain showed almost no other transcriptional changes in response to DLK inhibition, whereas the rTg4510 forebrain and the cerebellum exhibited distinct differentially expressed gene signatures. In the cerebellum, but not the rTg4510 forebrain, pathway analysis indicated that DLK regulates insulin growth factor-1 (IGF1) signaling through the transcriptional induction of IGF1 binding protein-5 (IGFBP5), which was confirmed and found to be functionally relevant by measuring signaling through the IGF1 receptor. Together these data illuminate the complex multi-functional nature of DLK signaling in the central nervous system (CNS) and demonstrate its role in homeostasis as well as tau-mediated neurodegeneration.
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Affiliation(s)
- Sunil Goodwani
- The Neurodegeneration Consortium, Therapeutics Discovery Division, University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA; (S.G.); (C.F.); (P.J.A.); (V.B.-P.); (M.L.M.); (J.M.); (C.H.H.); (M.E.H.)
| | - Celia Fernandez
- The Neurodegeneration Consortium, Therapeutics Discovery Division, University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA; (S.G.); (C.F.); (P.J.A.); (V.B.-P.); (M.L.M.); (J.M.); (C.H.H.); (M.E.H.)
| | - Paul J. Acton
- The Neurodegeneration Consortium, Therapeutics Discovery Division, University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA; (S.G.); (C.F.); (P.J.A.); (V.B.-P.); (M.L.M.); (J.M.); (C.H.H.); (M.E.H.)
| | - Virginie Buggia-Prevot
- The Neurodegeneration Consortium, Therapeutics Discovery Division, University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA; (S.G.); (C.F.); (P.J.A.); (V.B.-P.); (M.L.M.); (J.M.); (C.H.H.); (M.E.H.)
| | - Morgan L. McReynolds
- The Neurodegeneration Consortium, Therapeutics Discovery Division, University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA; (S.G.); (C.F.); (P.J.A.); (V.B.-P.); (M.L.M.); (J.M.); (C.H.H.); (M.E.H.)
| | - Jiacheng Ma
- The Neurodegeneration Consortium, Therapeutics Discovery Division, University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA; (S.G.); (C.F.); (P.J.A.); (V.B.-P.); (M.L.M.); (J.M.); (C.H.H.); (M.E.H.)
| | - Cheng Hui Hu
- The Neurodegeneration Consortium, Therapeutics Discovery Division, University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA; (S.G.); (C.F.); (P.J.A.); (V.B.-P.); (M.L.M.); (J.M.); (C.H.H.); (M.E.H.)
| | - Mary E. Hamby
- The Neurodegeneration Consortium, Therapeutics Discovery Division, University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA; (S.G.); (C.F.); (P.J.A.); (V.B.-P.); (M.L.M.); (J.M.); (C.H.H.); (M.E.H.)
| | - Yongying Jiang
- Institute for Applied Cancer Science, Therapeutics Discovery Division, University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA; (Y.J.); (K.L.); (M.J.S.); (P.J.)
| | - Kang Le
- Institute for Applied Cancer Science, Therapeutics Discovery Division, University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA; (Y.J.); (K.L.); (M.J.S.); (P.J.)
| | - Michael J. Soth
- Institute for Applied Cancer Science, Therapeutics Discovery Division, University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA; (Y.J.); (K.L.); (M.J.S.); (P.J.)
| | - Philip Jones
- Institute for Applied Cancer Science, Therapeutics Discovery Division, University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA; (Y.J.); (K.L.); (M.J.S.); (P.J.)
| | - William J. Ray
- The Neurodegeneration Consortium, Therapeutics Discovery Division, University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA; (S.G.); (C.F.); (P.J.A.); (V.B.-P.); (M.L.M.); (J.M.); (C.H.H.); (M.E.H.)
- Correspondence: ; Tel.: +1-713-794-4558
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10
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Goldstein DM, Kuglstatter A, Lou Y, Soth MJ. Selective p38α Inhibitors Clinically Evaluated for the Treatment of Chronic Inflammatory Disorders. J Med Chem 2009; 53:2345-53. [DOI: 10.1021/jm9012906] [Citation(s) in RCA: 150] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | - Yan Lou
- Roche Palo Alto, 3431 Hillview Avenue, Palo Alto, California 94304
| | - Michael J. Soth
- Roche Palo Alto, 3431 Hillview Avenue, Palo Alto, California 94304
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12
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Abstract
[reaction: see text] The convergent synthesis of the fully functionalized C(1)-C(18) segment 24 of the furanocembranes lophotoxin and pukalide was accomplished in 11 steps and 10% overall yield. The key step was a stereoselective conversion of alkynoate 21 to trimethylsilyl 2-alkenylfuran 22.
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Affiliation(s)
- Peter Wipf
- Department of Chemistry, University of Pittsburgh, Pennsylvania 15260, USA. pwipf+@pitt.edu
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Abstract
Molecules that fold to mimic protein secondary structures have emerged as important targets of bioorganic chemistry. Recently, a variety of compounds that mimic helices, turns, and sheets have been developed, with notable advances in the design of beta-peptides that mimic each of these structures. These compounds hold promise as a step toward synthetic molecules with protein-like properties and as drugs that block protein-protein interactions.
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Affiliation(s)
- K D Stigers
- Department of Chemistry, 535B Rowland Hall, University of California, Irvine, CA 92697-2025, USA.
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Affiliation(s)
- Michael J. Soth
- Department of Chemistry, University of California, Irvine, California 92697-2025
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Abstract
Within the past few years, a variety of compounds that mimic biopolymers have been developed. All of these unnatural oligomers are prepared by iterative syntheses, which are amenable to combinatorial strategies. Peptides continue to be popular targets for mimicry, and there is growing interest in targeting oligosaccharides. The incorporation of unnatural oligomers into compounds that adopt defined structures, such as helices or sheets, has emerged as an exciting new area of unnatural oligomer research.
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Affiliation(s)
- M J Soth
- Department of Chemistry, University of California at Irvine, Irvine, California 92697-2025, USA
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