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Yuan L, Jiang X, Jia G, Li Z, Wang M, Hu S, Yang J, Liang F, Zhang F, Gao L, Gao N. Minnelide exhibits antileukemic activity by targeting the Ars2/miR-190a-3p axis. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 130:155724. [PMID: 38759317 DOI: 10.1016/j.phymed.2024.155724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 04/25/2024] [Accepted: 05/07/2024] [Indexed: 05/19/2024]
Abstract
BACKGROUND The identification of a novel and effective strategy for the clinical treatment of acute leukemia (AL) is a long-term goal. Minnelide, a water-soluble prodrug of triptolide, has recently been evaluated in phase I and II clinical trials in patients with multiple cancers and has shown promise as an antileukemic agent. However, the molecular mechanism underlying minnelide's antileukemic activity remains unclear. PURPOSE To explore the molecular mechanisms by which minnelide exhibits antileukemic activity. METHODS AL cells, primary human leukemia cells, and a xenograft mouse model were treated with triptolide and minnelide. The molecular mechanism was elucidated using western blotting, immunoprecipitation, flow cytometry, GSEA and liquid chromatography-mass spectrometry analysis. RESULTS Minnelide was highly effective in inhibiting leukemogenesis and improving survival in two complementary AL mouse models. Triptolide, an active form of minnelide, causes cell cycle arrest in G1 phase and induces apoptosis in both human AL cell lines and primary AL cells. Mechanistically, we identified Ars2 as a new chemotherapeutic target of minnelide for AL treatment. We found that triptolide directly targeted Ars2, resulting in the downregulation of miR-190a-3p, which led to the disturbance of PTEN/Akt signaling and culminated in G1 cell cycle arrest and apoptosis. CONCLUSIONS Our findings demonstrate that targeting Ars2/miR-190a-3p signaling using minnelide could represent a novel chemotherapeutic strategy for AL treatment and support the evaluation of minnelide for the treatment of AL in clinical trials.
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Affiliation(s)
- Liang Yuan
- Key Laboratory of Basic Pharmacology of Ministry of Education, Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou 563006, PR China
| | - Xiuxing Jiang
- College of Pharmacy, Army Medical University, 30 Gaotanyan Street, Shapingba District, Chongqing 400038, PR China
| | - Guanfei Jia
- College of Pharmacy, Army Medical University, 30 Gaotanyan Street, Shapingba District, Chongqing 400038, PR China
| | - Zhiqiang Li
- College of Pharmacy, Army Medical University, 30 Gaotanyan Street, Shapingba District, Chongqing 400038, PR China
| | - Mei Wang
- Key Laboratory of Basic Pharmacology of Ministry of Education, Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou 563006, PR China
| | - Siyi Hu
- Key Laboratory of Basic Pharmacology of Ministry of Education, Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou 563006, PR China
| | - Jiawang Yang
- Key Laboratory of Basic Pharmacology of Ministry of Education, Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou 563006, PR China
| | - Feng Liang
- Key Laboratory of Basic Pharmacology of Ministry of Education, Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou 563006, PR China
| | - Fenglin Zhang
- Key Laboratory of Basic Pharmacology of Ministry of Education, Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou 563006, PR China
| | - Lu Gao
- Department of Hematology, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563000, PR China.
| | - Ning Gao
- Key Laboratory of Basic Pharmacology of Ministry of Education, Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou 563006, PR China.
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Holling GA, Chavel CA, Sharda AP, Lieberman MM, James CM, Lightman SM, Tong JH, Qiao G, Emmons TR, Giridharan T, Hou S, Intlekofer AM, Higashi RM, Fan TWM, Lane AN, Eng KH, Segal BH, Repasky EA, Lee KP, Olejniczak SH. CD8+ T cell metabolic flexibility elicited by CD28-ARS2 axis-driven alternative splicing of PKM supports antitumor immunity. Cell Mol Immunol 2024; 21:260-274. [PMID: 38233562 PMCID: PMC10902291 DOI: 10.1038/s41423-024-01124-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 12/26/2023] [Indexed: 01/19/2024] Open
Abstract
Metabolic flexibility has emerged as a critical determinant of CD8+ T-cell antitumor activity, yet the mechanisms driving the metabolic flexibility of T cells have not been determined. In this study, we investigated the influence of the nuclear cap-binding complex (CBC) adaptor protein ARS2 on mature T cells. In doing so, we discovered a novel signaling axis that endows activated CD8+ T cells with flexibility of glucose catabolism. ARS2 upregulation driven by CD28 signaling reinforced splicing factor recruitment to pre-mRNAs and affected approximately one-third of T-cell activation-induced alternative splicing events. Among these effects, the CD28-ARS2 axis suppressed the expression of the M1 isoform of pyruvate kinase in favor of PKM2, a key determinant of CD8+ T-cell glucose utilization, interferon gamma production, and antitumor effector function. Importantly, PKM alternative splicing occurred independently of CD28-driven PI3K pathway activation, revealing a novel means by which costimulation reprograms glucose metabolism in CD8+ T cells.
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Affiliation(s)
- G Aaron Holling
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
- University of Colorado Boulder, Boulder, CO, 80309, USA
| | - Colin A Chavel
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Anand P Sharda
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Mackenzie M Lieberman
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Caitlin M James
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Shivana M Lightman
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Jason H Tong
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Guanxi Qiao
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
- Dana Farber Cancer Institute, Boston, MA, 02215, USA
| | - Tiffany R Emmons
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
- Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
- Massachusetts Institute of Technology, Boston, MA, 02139, USA
| | - Thejaswini Giridharan
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
- Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Shengqi Hou
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA
| | - Andrew M Intlekofer
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA
| | - Richard M Higashi
- Center for Environmental Systems Biochemistry, Department of Toxicology and Cancer Biology and Markey Cancer Center, Lexington, KY, 40536, USA
| | - Teresa W M Fan
- Center for Environmental Systems Biochemistry, Department of Toxicology and Cancer Biology and Markey Cancer Center, Lexington, KY, 40536, USA
| | - Andrew N Lane
- Center for Environmental Systems Biochemistry, Department of Toxicology and Cancer Biology and Markey Cancer Center, Lexington, KY, 40536, USA
| | - Kevin H Eng
- Department of Cancer Genetics and Genomics, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Brahm H Segal
- Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Elizabeth A Repasky
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Kelvin P Lee
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
- Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
- Melvin and Bren Simon Comprehensive Cancer Center, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Scott H Olejniczak
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA.
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3
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Elahi S, Holling GA, Stablewski AB, Olejniczak SH. Improved hematopoietic differentiation of mouse embryonic stem cells through manipulation of the RNA binding protein ARS2. Stem Cell Res 2020; 43:101710. [PMID: 31986485 DOI: 10.1016/j.scr.2020.101710] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 01/09/2020] [Accepted: 01/13/2020] [Indexed: 10/25/2022] Open
Abstract
The RNA binding protein ARS2 is highly expressed in hematopoietic progenitor populations and is required for adult hematopoiesis. Recent molecular studies found that ARS2 coordinates interactions between nascent RNA polymerase II transcripts and downstream RNA processing machineries, yet how such interactions influence hematopoiesis remains largely unknown. Techniques to differentiate embryonic stem cells (ESC) to hematopoietic progenitor cells (HPC) and mature blood cells have increased molecular understanding of hematopoiesis. Taking such an in vitro approach to examine the influence of ARS2 on hematopoiesis, we found that ARS2 suppresses expression of some HSC signature genes and differentiation of ESC to a HPC population (CSMD-HPC) identified by markers expressed on bone marrow resident hematopoietic stem cells. In line with ARS2's ability to promote proliferation of cultured cells, ARS2 knockout ESC showed limited expansion and yielded less CSMD-HPC than wild-type ESC. In contrast, transient ARS2 knockdown led to doubling the number of CSMD-HPC generated per ESC without affecting further differentiation into mature T-cells. Overall, data indicate that ARS2 negatively regulates early hematopoietic differentiation of ESC, in stark contrast to its supportive role in adult hematopoiesis. Consequently, manipulation of ARS2 expression and/or function has potential utility in hematopoietic cell engineering and regenerative medicine.
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Affiliation(s)
- Seerat Elahi
- Department of Pathology and Anatomical Sciences, State University of New York at Buffalo, Buffalo, NY, United States
| | - G Aaron Holling
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, United States
| | - Aimee B Stablewski
- Department of Molecular and Cellular Biology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, United States
| | - Scott H Olejniczak
- Department of Pathology and Anatomical Sciences, State University of New York at Buffalo, Buffalo, NY, United States; Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, United States.
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Kainov YA, Makeyev EV. A transcriptome-wide antitermination mechanism sustaining identity of embryonic stem cells. Nat Commun 2020; 11:361. [PMID: 31953406 PMCID: PMC6969169 DOI: 10.1038/s41467-019-14204-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 12/11/2019] [Indexed: 11/29/2022] Open
Abstract
Eukaryotic gene expression relies on extensive crosstalk between transcription and RNA processing. Changes in this composite regulation network may provide an important means for shaping cell type-specific transcriptomes. Here we show that the RNA-associated protein Srrt/Ars2 sustains embryonic stem cell (ESC) identity by preventing premature termination of numerous transcripts at cryptic cleavage/polyadenylation sites in first introns. Srrt interacts with the nuclear cap-binding complex and facilitates recruitment of the spliceosome component U1 snRNP to cognate intronic positions. At least in some cases, U1 recruited in this manner inhibits downstream cleavage/polyadenylation events through a splicing-independent mechanism called telescripting. We further provide evidence that the naturally high expression of Srrt in ESCs offsets deleterious effects of retrotransposable sequences accumulating in its targets. Our work identifies Srrt as a molecular guardian of the pluripotent cell state. Besides its role in splicing, U1 snRNP can suppress pre-mRNA cleavage and polyadenylation. The authors show that the nuclear cap-binding complex component Srrt/Ars2 maintains embryonic stem cell identity by promoting U1 recruitment to first introns and preventing premature termination of multiple transcripts.
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Affiliation(s)
- Yaroslav A Kainov
- Centre for Developmental Neurobiology, King's College London, London, SE1 1UL, UK
| | - Eugene V Makeyev
- Centre for Developmental Neurobiology, King's College London, London, SE1 1UL, UK.
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Thakor N, Kothe U, Wieden HJ, Patel TR. Proceedings of the 14th annual RiboWest conference: perspectives and outcome. Biochem Cell Biol 2020; 98:vii-ix. [PMID: 31934779 DOI: 10.1139/bcb-2019-0187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The RiboWest Conference brings together RNA researchers in Canada with the 2-fold goals of fostering internationally competitive RNA research and of training the next generation of scientists. The 14th Annual RiboWest conference (RiboWest 2018) was held at the University of Lethbridge (Lethbridge, Alberta) from June 10th to 13th, 2018. This meeting was focused on all major aspects of RNA research, ranging from understanding the cellular role of RNA, studying RNA interactions and structures, and employing them as a therapeutic tool. The invited keynote speakers (5) provided insights into the wide-range of RNA-based research. One of the unique features of this conference was that the majority of the oral presentations were given by the trainees (undergraduate/graduate students and postdoctoral researchers). Hosted by the Alberta RNA Research and Training Institute (ARRTI) at the University of Lethbridge as the leading center of RNA research in Western Canada, the RiboWest 2018 was well attended by researchers from across the country (>110 attendees in total). This conference proceedings editorial presents the overview of the conference, and briefly introduces articles published in this special issue of Biochemistry and Cell Biology.
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Affiliation(s)
- Nehal Thakor
- Alberta RNA Research and Training Institute (ARRTI), Department of Chemistry & Biochemistry, University of Lethbridge, 4401 University Drive West, T1K 3M4, Lethbridge, Alberta, Canada.,Alberta RNA Research and Training Institute (ARRTI), Department of Chemistry & Biochemistry, University of Lethbridge, 4401 University Drive West, T1K 3M4, Lethbridge, Alberta, Canada
| | - Ute Kothe
- Alberta RNA Research and Training Institute (ARRTI), Department of Chemistry & Biochemistry, University of Lethbridge, 4401 University Drive West, T1K 3M4, Lethbridge, Alberta, Canada.,Alberta RNA Research and Training Institute (ARRTI), Department of Chemistry & Biochemistry, University of Lethbridge, 4401 University Drive West, T1K 3M4, Lethbridge, Alberta, Canada
| | - Hans-Joachim Wieden
- Alberta RNA Research and Training Institute (ARRTI), Department of Chemistry & Biochemistry, University of Lethbridge, 4401 University Drive West, T1K 3M4, Lethbridge, Alberta, Canada.,Alberta RNA Research and Training Institute (ARRTI), Department of Chemistry & Biochemistry, University of Lethbridge, 4401 University Drive West, T1K 3M4, Lethbridge, Alberta, Canada
| | - Trushar R Patel
- Alberta RNA Research and Training Institute (ARRTI), Department of Chemistry & Biochemistry, University of Lethbridge, 4401 University Drive West, T1K 3M4, Lethbridge, Alberta, Canada.,Alberta RNA Research and Training Institute (ARRTI), Department of Chemistry & Biochemistry, University of Lethbridge, 4401 University Drive West, T1K 3M4, Lethbridge, Alberta, Canada
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