1
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Zhou X, Li M, Ai M, Li Y, Zhu X, Hansen MJ, Zhong J, Johnson KL, Zenka R, Pandey A, Pease LR, Zeng H. PP2A catalytic subunit alpha is critically required for CD8 + T cell homeostasis and anti-bacterial responses. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.02.06.578745. [PMID: 38370780 PMCID: PMC10871277 DOI: 10.1101/2024.02.06.578745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
While the functions of tyrosine phosphatases in T cell biology have been extensively studied, our knowledge on the contribution of serine/threonine phosphatases in T cells remains poor. Protein phosphatase 2A (PP2A) is one of the most abundantly expressed serine/threonine phosphatases. It is important in thymocyte development and CD4+ T cell differentiation. Utilizing a genetic model in which its catalytic subunit alpha isoform (PP2A Cα) is deleted in T cells, we investigated its contribution to CD8+ T cell homeostasis and effector functions. Our results demonstrate that T cell intrinsic PP2A Cα is critically required for CD8+ T cell homeostasis in secondary lymphoid organs and intestinal mucosal site. Importantly, PP2A Cα deficient CD8+ T cells exhibit reduced proliferation and survival. CD8+ T cell anti-bacterial response is strictly dependent on PP2A Cα. Expression of Bcl2 transgene rescues CD8+ T cell homeostasis in spleens, but not in intestinal mucosal site, nor does it restore the defective anti-bacterial responses. Finally, proteomics and phosphoproteomics analyses reveal potential targets dependent on PP2A Cα, including mTORC1 and AKT. Thus, PP2A Cα is a key modulator of CD8+ T cell homeostasis and effector functions.
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Affiliation(s)
- Xian Zhou
- Division of Rheumatology, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Meilu Li
- Division of Rheumatology, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Minji Ai
- Division of Rheumatology, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Yanfeng Li
- Division of Rheumatology, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Xingxing Zhu
- Division of Rheumatology, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Michael J Hansen
- Department of Immunology, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
| | - Jun Zhong
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA
| | | | - Roman Zenka
- Proteomics Core, Mayo Clinic, Rochester, MN 55905, USA
| | - Akhilesh Pandey
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA
| | - Larry R Pease
- Department of Immunology, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
| | - Hu Zeng
- Division of Rheumatology, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
- Department of Immunology, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
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2
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Johnson H, Narayan S, Sharma AK. Altering phosphorylation in cancer through PP2A modifiers. Cancer Cell Int 2024; 24:11. [PMID: 38184584 PMCID: PMC10770906 DOI: 10.1186/s12935-023-03193-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 12/25/2023] [Indexed: 01/08/2024] Open
Abstract
Protein phosphatase 2A (PP2A) is a serine/threonine phosphatase integral to the regulation of many cellular processes. Due to the deregulation of PP2A in cancer, many of these processes are turned toward promoting tumor progression. Considerable research has been undertaken to discover molecules capable of modulating PP2A activity in cancer. Because PP2A is capable of immense substrate specificity across many cellular processes, the therapeutic targeting of PP2A in cancer can be completed through either enzyme inhibitors or activators. PP2A modulators likewise tend to be effective in drug-resistant cancers and work synergistically with other known cancer therapeutics. In this review, we will discuss the patterns of PP2A deregulation in cancer, and its known downstream signaling pathways important for cancer regulation, along with many activators and inhibitors of PP2A known to inhibit cancer progression.
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Affiliation(s)
- Hannah Johnson
- Department of Pharmacology, Penn State Cancer Institute, The Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Satya Narayan
- Department of Anatomy and Cell Biology, University of Florida, Gainesville, FL, 32610, USA
| | - Arun K Sharma
- Department of Pharmacology, Penn State Cancer Institute, The Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA.
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3
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Tang OY, Binder ZA, O'Rourke DM, Bagley SJ. Optimizing CAR-T Therapy for Glioblastoma. Mol Diagn Ther 2023; 27:643-660. [PMID: 37700186 DOI: 10.1007/s40291-023-00671-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/14/2023] [Indexed: 09/14/2023]
Abstract
Chimeric antigen receptor T-cell therapies have transformed the management of hematologic malignancies but have not yet demonstrated consistent efficacy in solid tumors. Glioblastoma is the most common primary malignant brain tumor in adults and remains a major unmet medical need. Attempts at harnessing the potential of chimeric antigen receptor T-cell therapy for glioblastoma have resulted in glimpses of promise but have been met with substantial challenges. In this focused review, we discuss current and future strategies being developed to optimize chimeric antigen receptor T cells for efficacy in patients with glioblastoma, including the identification and characterization of new target antigens, reversal of T-cell dysfunction with novel chimeric antigen receptor constructs, regulatable platforms, and gene knockout strategies, and the use of combination therapies to overcome the immune-hostile microenvironment.
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Affiliation(s)
- Oliver Y Tang
- Warren Alpert Medical School, Brown University, Providence, RI, 02903, USA
| | - Zev A Binder
- Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Donald M O'Rourke
- Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Stephen J Bagley
- Department of Medicine, Perelman School of Medicine, University of Pennsylvania, 3400 Civic Center Blvd, Philadelphia, PA, 19104, USA.
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4
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Feng Y, Massarelli E, Forman E, Kovach JS, Salgia R, Synold TW. An LC-MS/MS method for simultaneous determination of LB-100 and its active metabolite, endothall, in human plasma. Bioanalysis 2023; 15:1095-1107. [PMID: 37584370 PMCID: PMC10505989 DOI: 10.4155/bio-2023-0078] [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: 05/01/2023] [Accepted: 07/13/2023] [Indexed: 08/17/2023] Open
Abstract
We have developed and validated a novel LC-MS/MS method for the simultaneous quantification of LB-100 and its active metabolite, endothall, in human plasma following solid-phase extraction. LB-105 and endothall-D6 were used as internal standards. Chromatographic separation was achieved on a Hypercarb™ column using 5 mM (NH4)2CO3 and 30:70 (v/v) 100 mM (NH4)2CO3:acetonitrile as mobile phases. Detection was performed via positive electrospray ionization mode with multiple reaction monitoring. The assay exhibited linearity in the concentration range of 2.5-500 ng/ml for both analytes. Intra- and inter-assay precision and accuracy were within ±11%. LB-100 and endothall recoveries were 78.7 and 86.7%, respectively. The validated LC-MS/MS method enabled the accurate measurement of LB-100 and endothall in patient samples from an ongoing clinical trial (NCT04560972).
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Affiliation(s)
- Ye Feng
- Department of Medical Oncology & Therapeutics Research, City of Hope, 1500 East Duarte Rd, Duarte, CA 91010, USA
| | - Erminia Massarelli
- Department of Medical Oncology & Therapeutics Research, City of Hope, 1500 East Duarte Rd, Duarte, CA 91010, USA
| | - Eric Forman
- LIXTE Biotechnology, Inc. 680 E Colorado Blvd, Suite 180, Pasadena, CA 91101, USA
| | - John S Kovach
- LIXTE Biotechnology, Inc. 680 E Colorado Blvd, Suite 180, Pasadena, CA 91101, USA
| | - Ravi Salgia
- Department of Medical Oncology & Therapeutics Research, City of Hope, 1500 East Duarte Rd, Duarte, CA 91010, USA
| | - Timothy W Synold
- Department of Medical Oncology & Therapeutics Research, City of Hope, 1500 East Duarte Rd, Duarte, CA 91010, USA
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5
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Yin L, Wan Z, Sun P, Shuai P, Liu Y. Time to abandon CAR-T monotherapy for solid tumors. Biochim Biophys Acta Rev Cancer 2023; 1878:188930. [PMID: 37286147 DOI: 10.1016/j.bbcan.2023.188930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 05/26/2023] [Accepted: 05/30/2023] [Indexed: 06/09/2023]
Abstract
In recent decades, chimeric antigen receptor T (CAR-T) cell therapy has achieved dramatic success in patients with hematological malignancies. However, CAR-T cell therapy failed to effectively treat solid tumors as a monotherapy. By summarizing the challenges of CAR-T cell monotherapy for solid tumors and analyzing the underlying mechanisms of combinatorial strategies to counteract these hurdles, we found that complementary therapeutics are needed to improve the scant and transient responses of CAR-T cell monotherapy in solid tumors. Further data, especially data from multicenter clinical trials regarding efficacy, toxicity, and predictive biomarkers are required before the CAR-T combination therapy can be translated into clinical settings.
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Affiliation(s)
- Limei Yin
- Department of Health Management & Institute of Health Management, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, China
| | - Zhengwei Wan
- Department of Health Management & Institute of Health Management, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, China
| | - Ping Sun
- Department of Health Management & Institute of Health Management, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, China
| | - Ping Shuai
- Department of Health Management & Institute of Health Management, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, China.
| | - Yuping Liu
- Department of Health Management & Institute of Health Management, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, China.
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6
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Wang C, Li Y, Gu L, Chen R, Zhu H, Zhang X, Zhang Y, Feng S, Qiu S, Jian Z, Xiong X. Gene Targets of CAR-T Cell Therapy for Glioblastoma. Cancers (Basel) 2023; 15:cancers15082351. [PMID: 37190280 DOI: 10.3390/cancers15082351] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 04/05/2023] [Accepted: 04/15/2023] [Indexed: 05/17/2023] Open
Abstract
Glioblastoma (GBM) is an aggressive primary brain tumor with a poor prognosis following conventional therapeutic interventions. Moreover, the blood-brain barrier (BBB) severely impedes the permeation of chemotherapy drugs, thereby reducing their efficacy. Consequently, it is essential to develop novel GBM treatment methods. A novel kind of pericyte immunotherapy known as chimeric antigen receptor T (CAR-T) cell treatment uses CAR-T cells to target and destroy tumor cells without the aid of the antigen with great specificity and in a manner that is not major histocompatibility complex (MHC)-restricted. It has emerged as one of the most promising therapy techniques with positive clinical outcomes in hematological cancers, particularly leukemia. Due to its efficacy in hematologic cancers, CAR-T cell therapy could potentially treat solid tumors, including GBM. On the other hand, CAR-T cell treatment has not been as therapeutically effective in treating GBM as it has in treating other hematologic malignancies. CAR-T cell treatments for GBM have several challenges. This paper reviewed the use of CAR-T cell therapy in hematologic tumors and the selection of targets, difficulties, and challenges in GBM.
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Affiliation(s)
- Chaoqun Wang
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
- Department of Neurosurgery, Huzhou Central Hospital, Affiliated Huzhou Hospital, Zhejiang University School of Medicine, Huzhou 310009, China
| | - Yuntao Li
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
- Department of Neurosurgery, Huzhou Central Hospital, Affiliated Huzhou Hospital, Zhejiang University School of Medicine, Huzhou 310009, China
| | - Lijuan Gu
- Central Laboratory, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Ran Chen
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Hua Zhu
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Xu Zhang
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Yonggang Zhang
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Shi Feng
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Sheng Qiu
- Department of Neurosurgery, Huzhou Central Hospital, Affiliated Huzhou Hospital, Zhejiang University School of Medicine, Huzhou 310009, China
- Huzhou Key Laboratory of Basic Research and Clinical Translation for Neuromodulation, Huzhou 313003, China
| | - Zhihong Jian
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Xiaoxing Xiong
- Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
- Department of Neurosurgery, Huzhou Central Hospital, Affiliated Huzhou Hospital, Zhejiang University School of Medicine, Huzhou 310009, China
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7
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Choi JY, Kim TJ. The Current Status and Future Perspectives of Chimeric Antigen Receptor-Engineered T Cell Therapy for the Management of Patients with Endometrial Cancer. Curr Issues Mol Biol 2023; 45:3359-3374. [PMID: 37185744 PMCID: PMC10136476 DOI: 10.3390/cimb45040220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 04/11/2023] [Accepted: 04/11/2023] [Indexed: 05/17/2023] Open
Abstract
Endometrial cancer (EC) is a gynecological neoplasm that is increasing in occurrence and mortality rates. Although endometrial cancer in the early stages shows a relatively favorable prognosis, there is an increase in cancer-related mortality rates in the advanced or recurrent endometrial carcinoma population and patients in the metastatic setting. This discrepancy has presented an opportunity for research and development of target therapies in this population. After obtaining promising results with hematologic cancers, chimeric antigen receptor (CAR)-T cell immunotherapy is gaining acceptance as a treatment for solid neoplasms. This treatment platform allows T cells to express tumor-specific CARs on the cell surface, which are administered to the patient to treat neoplastic cells. Given that CAR-T cell therapy has shown potential and clinical benefit compared to other T cell treatment platforms, additional research is required to overcome physiological limitations such as CAR-T cell depletion, immunosuppressive tumor microenvironment, and the lack of specific target molecules. Different approaches and development are ongoing to overcome these complications. This review examines CAR-T cell therapy's current use for endometrial carcinomas. We also discuss the significant adverse effects and limitations of this immunotherapeutic approach. Finally, we consolidate signal-seeking early-phase clinical trials and advancements that have shown promising results, leading to the approval of new immunotherapeutic agents for the disease.
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Affiliation(s)
- Ji-Young Choi
- Department of Gynecology and Infertility Medicine, CHA University Ilsan Medical Center, Goyang 1205, Republic of Korea
| | - Tae-Jin Kim
- Department of Urology, CHA University Ilsan Medical Center, CHA University School of Medicine, Goyang 1205, Republic of Korea
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8
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Huang Z, Dewanjee S, Chakraborty P, Jha NK, Dey A, Gangopadhyay M, Chen XY, Wang J, Jha SK. CAR T cells: engineered immune cells to treat brain cancers and beyond. Mol Cancer 2023; 22:22. [PMID: 36721153 PMCID: PMC9890802 DOI: 10.1186/s12943-022-01712-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 12/29/2022] [Indexed: 02/01/2023] Open
Abstract
Malignant brain tumors rank among the most challenging type of malignancies to manage. The current treatment protocol commonly entails surgery followed by radiotherapy and/or chemotherapy, however, the median patient survival rate is poor. Recent developments in immunotherapy for a variety of tumor types spark optimism that immunological strategies may help patients with brain cancer. Chimeric antigen receptor (CAR) T cells exploit the tumor-targeting specificity of antibodies or receptor ligands to direct the cytolytic capacity of T cells. Several molecules have been discovered as potential targets for immunotherapy-based targeting, including but not limited to EGFRvIII, IL13Rα2, and HER2. The outstanding clinical responses to CAR T cell-based treatments in patients with hematological malignancies have generated interest in using this approach to treat solid tumors. Research results to date support the astounding clinical response rates of CD19-targeted CAR T cells, early clinical experiences in brain tumors demonstrating safety and evidence for disease-modifying activity, and the promise for further advances to ultimately assist patients clinically. However, several variable factors seem to slow down the progress rate regarding treating brain cancers utilizing CAR T cells. The current study offers a thorough analysis of CAR T cells' promise in treating brain cancer, including design and delivery considerations, current strides in clinical and preclinical research, issues encountered, and potential solutions.
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Affiliation(s)
- Zoufang Huang
- grid.452437.3Department of Hematology, Ganzhou Key Laboratory of Hematology, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Saikat Dewanjee
- grid.216499.10000 0001 0722 3459Advanced Pharmacognosy Research Laboratory, Department of Pharmaceutical Technology, Jadavpur University, Kolkata, 700032 India
| | - Pratik Chakraborty
- grid.216499.10000 0001 0722 3459Advanced Pharmacognosy Research Laboratory, Department of Pharmaceutical Technology, Jadavpur University, Kolkata, 700032 India
| | - Niraj Kumar Jha
- grid.412552.50000 0004 1764 278XDepartment of Biotechnology, School of Engineering & Technology, Sharda University, Greater Noida, Uttar Pradesh 201310 India
| | - Abhijit Dey
- grid.412537.60000 0004 1768 2925Department of Life Sciences, Presidency University, 86/1 College Street, Kolkata, West Bengal 700032 India
| | - Moumita Gangopadhyay
- grid.502979.00000 0004 6087 8632Department of Biotechnology, School of Life Science and Biotechnology, Adamas University, Barasat, Kolkata, West Bengal 700126 India
| | - Xuan-Yu Chen
- grid.264091.80000 0001 1954 7928Institute for Biotechnology, St. John’s University, Queens, New York, 11439 USA
| | - Jian Wang
- Department of Radiotherapy, the Affiliated Jiangyin People’s Hospital of Nantong University, Jiangyin, 214400 China
| | - Saurabh Kumar Jha
- grid.412552.50000 0004 1764 278XDepartment of Biotechnology, School of Engineering & Technology, Sharda University, Greater Noida, Uttar Pradesh 201310 India ,grid.448792.40000 0004 4678 9721Department of Biotechnology Engineering and Food Technology, Chandigarh University, Mohali, 140413 India ,grid.449906.60000 0004 4659 5193Department of Biotechnology, School of Applied & Life Sciences (SALS), Uttaranchal University, Dehradun, 248007 India
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9
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The Pivotal Role of Protein Phosphatase 2A (PP2A) in Brain Tumors. Int J Mol Sci 2022; 23:ijms232415717. [PMID: 36555359 PMCID: PMC9779694 DOI: 10.3390/ijms232415717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 12/09/2022] [Accepted: 12/10/2022] [Indexed: 12/14/2022] Open
Abstract
Protein phosphatase 2A (PP2A) is a highly complex heterotrimeric Ser/Thr phosphatase that regulates many cellular processes. PP2A is dysregulated in several human diseases, including oncological pathology; interestingly, PP2A appears to be essential for controlling cell growth and may be involved in cancer development. The role of PP2A as a tumor suppressor has been extensively studied and reviewed. To leverage the potential clinical utility of combination PP2A inhibition and radiotherapy treatment, it is vital that novel highly specific PP2A inhibitors be developed. In this review, the existing literature on the role of PP2A in brain tumors, especially in gliomas and glioblastoma (GBM), was analyzed. Interestingly, the review focused on the role of PP2A inhibitors, focusing on CIP2A inhibition, as CIP2A participated in tumor cell growth by stimulating cell-renewal survival, cellular proliferation, evasion of senescence and inhibition of apoptosis. This review suggested CIP2A inhibition as a promising strategy in oncology target therapy.
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10
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Ronk H, Rosenblum JS, Kung T, Zhuang Z. Targeting PP2A for cancer therapeutic modulation. Cancer Biol Med 2022; 19:1428-1439. [PMID: 36342229 PMCID: PMC9630519 DOI: 10.20892/j.issn.2095-3941.2022.0330] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 08/26/2022] [Indexed: 09/12/2023] Open
Abstract
Protein phosphatases play essential roles as negative regulators of kinases and signaling cascades involved in cytoskeletal organization. Protein phosphatase 2A (PP2A) is highly conserved and is the predominant serine/threonine phosphatase in the nervous system, constituting more than 70% of all neuronal phosphatases. PP2A is involved in diverse regulatory functions, including cell cycle progression, apoptosis, and DNA repair. Although PP2A has historically been identified as a tumor suppressor, inhibition of PP2A has paradoxically demonstrated potential as a therapeutic target for various cancers. LB100, a water-soluble, small-molecule competitive inhibitor of PP2A, has shown particular promise as a chemo- and radio-sensitizing agent. Preclinical success has led to a profusion of clinical trials on LB100 adjuvant therapies, including a phase I trial in extensive-stage small-cell lung cancer, a phase I/II trial in myelodysplastic syndrome, a phase II trial in recurrent glioblastoma, and a completed phase I trial assessing the safety of LB100 and docetaxel in various relapsed solid tumors. Herein, we review the development of LB100, the role of PP2A in cancer biology, and recent advances in targeting PP2A inhibition in immunotherapy.
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Affiliation(s)
- Halle Ronk
- Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Jared S. Rosenblum
- Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Timothy Kung
- Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Zhengping Zhuang
- Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
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11
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Chatterjee A, Asija S, Yadav S, Purwar R, Goda JS. Clinical utility of CAR T cell therapy in brain tumors: Lessons learned from the past, current evidence and the future stakes. Int Rev Immunol 2022; 41:606-624. [PMID: 36191126 DOI: 10.1080/08830185.2022.2125963] [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: 10/10/2022]
Abstract
The unprecedented clinical success of Chimeric Antigen Receptor (CAR) T cell therapy in hematological malignancies has led researchers to study its role in solid tumors. Although, its utility in solid tumors especially in neuroblastoma has begun to emerge, preclinical studies of its efficacy in other solid tumors like osteosarcomas or gliomas has caught the attention of oncologist to be tried in clinical trials. Malignant high-grade brain tumors like glioblastomas or midline gliomas in children represent some of the most difficult malignancies to be managed with conventionally available therapeutics, while relapsed gliomas continue to have the most dismal prognosis due to limited therapeutic options. Innovative therapies such as CAR T cells could give an additional leverage to the treating oncologists by potentially improving outcomes and ameliorating the toxicity of the currently available therapies. Moreover, CAR T cell therapy has the potential to be integrated into the therapeutic paradigm for aggressive gliomas in the near future. In this review we discuss the challenges in using CAR T cell therapy in brain tumors, enumerate the completed and ongoing clinical trials of different types of CAR T cell therapy for different brain tumors with special emphasis on glioblastoma and also discuss the future role of CAR T cells in Brain tumors.
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Affiliation(s)
- Abhishek Chatterjee
- Department of Radiation Oncology, ACTREC, Tata Memorial Centre, Navi Mumbai, India.,Homi Bhabha National Institute, Mumbai, India
| | - Sweety Asija
- Department of Biosciences & Bioengineering, Indian Institute of Technology, Mumbai, India
| | - Sandhya Yadav
- Department of Radiation Oncology, ACTREC, Tata Memorial Centre, Navi Mumbai, India.,Homi Bhabha National Institute, Mumbai, India
| | - Rahul Purwar
- Department of Biosciences & Bioengineering, Indian Institute of Technology, Mumbai, India
| | - Jayant S Goda
- Department of Radiation Oncology, ACTREC, Tata Memorial Centre, Navi Mumbai, India.,Homi Bhabha National Institute, Mumbai, India
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12
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Hu B, Hao S, Miao Y, Deng Y, Wang J, Wan H, Zhang S, Ji N, Feng J. Inhibiting PP2A Upregulates B7-H3 Expression and Potentially Increases the Sensitivity of Malignant Meningiomas to Immunotherapy by Proteomics. Pathol Oncol Res 2022; 28:1610572. [PMID: 36203966 PMCID: PMC9530036 DOI: 10.3389/pore.2022.1610572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 09/02/2022] [Indexed: 12/03/2022]
Abstract
Malignant meningiomas have a high mortality rate and short survival time and currently have no effective treatment. In our study, proteomics analysis was performed to identify highly expressed proteins as therapeutic targets in malignant meningiomas. Cell Counting Kit-8 (CCK-8) assays were performed to verify the effect of LB-100 on the growth of malignant meningiomas. In addition, immunoblotting was used to verify the expression of B7-H3 and phosphorylation of STAT1 (Tyr701) in tissues and cells. Our results show that STAT1 and CD276 (B7-H3) regulated by PP2A were enriched in GO_IMMUNE_EFFECTOR_PROCESS and GO_REGULATION_OF_IMMUNE_SYSTEM_PROCESS. The immunotherapy target protein B7-H3 was confirmed to be upregulated in malignant meningiomas compared with meningothelial (p = 0.0001) and fibroblastic (p = 0.0046) meningiomas. In vitro, the PP2A inhibitor LB-100 suppressed the growth and invasion of malignant meningioma cells. Notably, the PP2A inhibitor LB-100 increased the phosphorylation of STAT1, thereby increasing the expression of the immune checkpoint protein B7-H3 in malignant meningioma cells in vitro. In conclusion, B7-H3 was found to be upregulated in malignant meningiomas. The PP2A inhibitor LB-100 increased the phosphorylation of STAT1 and B7-H3 expression, which could increase the sensitivity of malignant meningiomas to B7-H3 targeted immunotherapy.
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Affiliation(s)
- Boyi Hu
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
| | - Shuyu Hao
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Yazhou Miao
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Yuxuan Deng
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jing Wang
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
| | - Hong Wan
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
| | - Shaodong Zhang
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
| | - Nan Ji
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jie Feng
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
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13
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Sun J, Li X, Chen P, Gao Y. From Anti-HER-2 to Anti-HER-2-CAR-T Cells: An Evolutionary Immunotherapy Approach for Gastric Cancer. J Inflamm Res 2022; 15:4061-4085. [PMID: 35873388 PMCID: PMC9304417 DOI: 10.2147/jir.s368138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 06/29/2022] [Indexed: 11/23/2022] Open
Abstract
Current Therapeutic modalities provide no survival advantage to gastric cancer (GC) patients. Targeting the human epidermal growth factor receptor-2 (HER-2) is a viable therapeutic strategy against advanced HER-2 positive GC. Antibody-drug conjugates, small-molecule tyrosine kinase inhibitors (TKIs), and bispecific antibodies are emerging as novel drug forms that may abrogate the resistance to HER-2-specific drugs and monoclonal antibodies. Chimeric antigen receptor-modified T cells (CAR-T) targeting HER-2 have shown considerable therapeutic potential in GC and other solid tumors. However, due to the high heterogeneity along with the complex tumor microenvironment (TME) of GC that often leads to immune escape, the immunological treatment of GC still faces many challenges. Here, we reviewed and discussed the current progress in the research of anti-HER-2-CAR-T cell immunotherapy against GC.
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Affiliation(s)
- Jiangang Sun
- Department of Gastrointestinal Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, 450052, People's Republic of China
| | - Xiaojing Li
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, 450052, People's Republic of China
| | - Peng Chen
- Department of Gastrointestinal Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, 450052, People's Republic of China
| | - Yongshun Gao
- Department of Gastrointestinal Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, 450052, People's Republic of China
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14
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Thakur A, Faujdar C, Sharma R, Sharma S, Malik B, Nepali K, Liou JP. Glioblastoma: Current Status, Emerging Targets, and Recent Advances. J Med Chem 2022; 65:8596-8685. [PMID: 35786935 PMCID: PMC9297300 DOI: 10.1021/acs.jmedchem.1c01946] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
Glioblastoma (GBM) is a highly malignant
brain tumor characterized
by a heterogeneous population of genetically unstable and highly infiltrative
cells that are resistant to chemotherapy. Although substantial efforts
have been invested in the field of anti-GBM drug discovery in the
past decade, success has primarily been confined to the preclinical
level, and clinical studies have often been hampered due to efficacy-,
selectivity-, or physicochemical property-related issues. Thus, expansion
of the list of molecular targets coupled with a pragmatic design of
new small-molecule inhibitors with central nervous system (CNS)-penetrating
ability is required to steer the wheels of anti-GBM drug discovery
endeavors. This Perspective presents various aspects of drug discovery
(challenges in GBM drug discovery and delivery, therapeutic targets,
and agents under clinical investigation). The comprehensively covered
sections include the recent medicinal chemistry campaigns embarked
upon to validate the potential of numerous enzymes/proteins/receptors
as therapeutic targets in GBM.
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Affiliation(s)
- Amandeep Thakur
- School of Pharmacy, College of Pharmacy, Taipei Medical University, 250 Wuxing Street, Taipei 11031, Taiwan
| | - Chetna Faujdar
- Department of Biotechnology, Jaypee Institute of Information Technology, Noida 201307, India
| | - Ram Sharma
- School of Pharmacy, College of Pharmacy, Taipei Medical University, 250 Wuxing Street, Taipei 11031, Taiwan
| | - Sachin Sharma
- School of Pharmacy, College of Pharmacy, Taipei Medical University, 250 Wuxing Street, Taipei 11031, Taiwan
| | - Basant Malik
- Department of Sterile Product Development, Research and Development-Unit 2, Jubiliant Generics Ltd., Noida 201301, India
| | - Kunal Nepali
- School of Pharmacy, College of Pharmacy, Taipei Medical University, 250 Wuxing Street, Taipei 11031, Taiwan
| | - Jing Ping Liou
- School of Pharmacy, College of Pharmacy, Taipei Medical University, 250 Wuxing Street, Taipei 11031, Taiwan
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15
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Titov A, Kaminskiy Y, Ganeeva I, Zmievskaya E, Valiullina A, Rakhmatullina A, Petukhov A, Miftakhova R, Rizvanov A, Bulatov E. Knowns and Unknowns about CAR-T Cell Dysfunction. Cancers (Basel) 2022; 14:cancers14041078. [PMID: 35205827 PMCID: PMC8870103 DOI: 10.3390/cancers14041078] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 01/29/2022] [Accepted: 02/11/2022] [Indexed: 02/01/2023] Open
Abstract
Simple Summary The primary issue of adoptive cell therapy is the poor in vivo persistence. In this context, it is necessary to clarify the fundamental mechanisms of T cell dysfunction. Here we review common dysfunctional states, including exhaustion and senescence, and discuss the challenges associated with phenotypical characterization of these T cell subsets. We overview the heterogeneity among exhausted T cells as well as mechanisms by which T cells get reinvigorated by checkpoint inhibitors. We emphasize that some cancers not responding to such treatment may activate distinct T cell dysfunction programs. Finally, we describe the dysfunction-promoting mechanisms specific for CAR-T cells and the ways to mitigate them. Abstract Immunotherapy using chimeric antigen receptor (CAR) T cells is a promising option for cancer treatment. However, T cells and CAR-T cells frequently become dysfunctional in cancer, where numerous evasion mechanisms impair antitumor immunity. Cancer frequently exploits intrinsic T cell dysfunction mechanisms that evolved for the purpose of defending against autoimmunity. T cell exhaustion is the most studied type of T cell dysfunction. It is characterized by impaired proliferation and cytokine secretion and is often misdefined solely by the expression of the inhibitory receptors. Another type of dysfunction is T cell senescence, which occurs when T cells permanently arrest their cell cycle and proliferation while retaining cytotoxic capability. The first section of this review provides a broad overview of T cell dysfunctional states, including exhaustion and senescence; the second section is focused on the impact of T cell dysfunction on the CAR-T therapeutic potential. Finally, we discuss the recent efforts to mitigate CAR-T cell exhaustion, with an emphasis on epigenetic and transcriptional modulation.
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Affiliation(s)
- Aleksei Titov
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia; (A.T.); (I.G.); (E.Z.); (A.V.); (A.R.); (A.P.); (R.M.); (A.R.)
- Laboratory of Transplantation Immunology, National Research Centre for Hematology, 125167 Moscow, Russia;
| | - Yaroslav Kaminskiy
- Laboratory of Transplantation Immunology, National Research Centre for Hematology, 125167 Moscow, Russia;
| | - Irina Ganeeva
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia; (A.T.); (I.G.); (E.Z.); (A.V.); (A.R.); (A.P.); (R.M.); (A.R.)
| | - Ekaterina Zmievskaya
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia; (A.T.); (I.G.); (E.Z.); (A.V.); (A.R.); (A.P.); (R.M.); (A.R.)
| | - Aygul Valiullina
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia; (A.T.); (I.G.); (E.Z.); (A.V.); (A.R.); (A.P.); (R.M.); (A.R.)
| | - Aygul Rakhmatullina
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia; (A.T.); (I.G.); (E.Z.); (A.V.); (A.R.); (A.P.); (R.M.); (A.R.)
| | - Alexey Petukhov
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia; (A.T.); (I.G.); (E.Z.); (A.V.); (A.R.); (A.P.); (R.M.); (A.R.)
- Institute of Hematology, Almazov National Medical Research Center, 197341 Saint Petersburg, Russia
| | - Regina Miftakhova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia; (A.T.); (I.G.); (E.Z.); (A.V.); (A.R.); (A.P.); (R.M.); (A.R.)
| | - Albert Rizvanov
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia; (A.T.); (I.G.); (E.Z.); (A.V.); (A.R.); (A.P.); (R.M.); (A.R.)
| | - Emil Bulatov
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia; (A.T.); (I.G.); (E.Z.); (A.V.); (A.R.); (A.P.); (R.M.); (A.R.)
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
- Correspondence:
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16
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Zeng W, Zhang P. Resistance and recurrence of malignancies after CAR-T cell therapy. Exp Cell Res 2022; 410:112971. [PMID: 34906583 DOI: 10.1016/j.yexcr.2021.112971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 12/08/2021] [Accepted: 12/10/2021] [Indexed: 11/04/2022]
Abstract
The emergence of chimeric antigen receptor T (CAR-T) cell therapy has ushered a new era in cancer therapy, especially the treatment of hematological malignancies. However, resistance and recurrence still occur in some patients after CAR-T cell treatment. CAR-T cell inefficiency and tumor escape have emerged as the main challenges for the long-term disease control of B cell malignancies by this promising immunotherapy. In solid tumor treatment, CAR-T cells must also overcome many hurdles from the tumor or immune-suppressed tumor environment, which have become obstacles to the advancement of CAR-T therapy. Therefore, an understanding of the mechanisms underlying post-CAR treatment failure in patients is necessary. In this review, we characterize some mechanisms of resistance and recurrence after CAR-T cell therapy and correspondingly suggest reasonable treatment strategies.
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Affiliation(s)
- Wanying Zeng
- National Center for International Research of Bio-targeting Theranostics, Guangxi Key Laboratory of Bio-targeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Talent Highland of Bio-targeting Theranostics, Guangxi Medical University, Nanning, Guangxi, 530021, China
| | - Pumin Zhang
- National Center for International Research of Bio-targeting Theranostics, Guangxi Key Laboratory of Bio-targeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Talent Highland of Bio-targeting Theranostics, Guangxi Medical University, Nanning, Guangxi, 530021, China; Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital of Zhejiang University, Hangzhou, Zhejiang Province, 310003, China; Institute of Translational Medicine, Zhejiang University Medical School, Hangzhou, Zhejiang Province, 310058, China.
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17
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Xu Y, Wei L, Tang S, Shi Q, Wu B, Yang X, Zou Y, Wang X, Ao Q, Meng L, Wei X, Zhang N, Li Y, Lan C, Chen M, Li X, Lu C. Regulation PP2Ac methylation ameliorating autophagy dysfunction caused by Mn is associated with mTORC1/ULK1 pathway. Food Chem Toxicol 2021; 156:112441. [PMID: 34363881 DOI: 10.1016/j.fct.2021.112441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 07/20/2021] [Accepted: 07/22/2021] [Indexed: 01/18/2023]
Abstract
Manganese (Mn) exposure leads to autophagy dysfunction and causes neurodegenerative diseases such as Parkinson's syndrome and Alzheimer's disease. However, the mechanism of neurotoxicity of Mn has been less clear. The methylation of the protein phosphatase 2A catalytic subunit determines the dephosphorylation activity of protein phosphatase and plays an important role in autophagy regulation. In this investigation, we established a model of Mn (0-2000 μmol/L) exposure to N2a cells for 12 h, used the PPME-1 inhibitor ABL-127, and constructed an LCMT1-overexpressing N2a cell line. We also regulated the PP2Ac methylation level and explored the effect of PP2Ac methylation on Mn-induced (0-1000 μmol/L) N2a cellular autophagy. Our results showed that Mn > 500 μmol/L induced N2a cell damage and increased oxidative stress. Moreover, Mn modulated autophagy in N2a cells by downregulating PP2Ac methylation, which regulated mTORC1 signaling pathway activation. Both ABL-127 and LCMT1 overexpression can upregulate PP2Ac methylation in parallel with ameliorating N2a cell abnormal autophagy induced by Mn, Briefly, the upregulation of PP2Ac methylation can ameliorate the autophagy disorder of N2a by Mn and effectively alleviate Mn-induced cytotoxicity and oxidative stress, indicating that regulation of autophagy is a protective strategy against Mn-induced neurotoxicity.
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Affiliation(s)
- Yilu Xu
- School of Public Health, Guangxi Medical University, Nanning, 530021, China
| | - Lancheng Wei
- School of Public Health, Guangxi Medical University, Nanning, 530021, China
| | - Shen Tang
- School of Preclinical Medicine, Guangxi Medical University, Nanning, 530021, China; Guangxi Colleges and Universities Key Laboratory of Preclinical Medicine, Nanning, 530021, China
| | - Qianqian Shi
- School of Public Health, Guangxi Medical University, Nanning, 530021, China
| | - Bin Wu
- School of Public Health, Guangxi Medical University, Nanning, 530021, China
| | - Xiaobo Yang
- School of Public Health, Guangxi Medical University, Nanning, 530021, China
| | - Yunfeng Zou
- School of Public Health, Guangxi Medical University, Nanning, 530021, China
| | - Xinhang Wang
- School of Preclinical Medicine, Guangxi Medical University, Nanning, 530021, China; Guangxi Colleges and Universities Key Laboratory of Preclinical Medicine, Nanning, 530021, China
| | - Qingqing Ao
- School of Public Health, Guangxi Medical University, Nanning, 530021, China
| | - Ling Meng
- School of Preclinical Medicine, Guangxi Medical University, Nanning, 530021, China
| | - Xuejing Wei
- School of Public Health, Guangxi Medical University, Nanning, 530021, China
| | - Ning Zhang
- School of Public Health, Guangxi Medical University, Nanning, 530021, China
| | - Yunqing Li
- School of Public Health, Guangxi Medical University, Nanning, 530021, China
| | - Chunhua Lan
- School of Preclinical Medicine, Guangxi Medical University, Nanning, 530021, China
| | - Muting Chen
- School of Public Health, Guangxi Medical University, Nanning, 530021, China
| | - Xiyi Li
- School of Public Health, Guangxi Medical University, Nanning, 530021, China.
| | - Cailing Lu
- School of Public Health, Guangxi Medical University, Nanning, 530021, China.
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18
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Bryant JP, Levy A, Heiss J, Banasavadi-Siddegowda YK. Review of PP2A Tumor Biology and Antitumor Effects of PP2A Inhibitor LB100 in the Nervous System. Cancers (Basel) 2021; 13:cancers13123087. [PMID: 34205611 PMCID: PMC8235527 DOI: 10.3390/cancers13123087] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 06/17/2021] [Accepted: 06/18/2021] [Indexed: 12/14/2022] Open
Abstract
Simple Summary Central and peripheral nervous system tumors represent a heterogenous group of neoplasms which often demonstrate resistance to treatment. Given that these tumors are often refractory to conventional therapy, novel pharmaceutical regimens are needed for successfully treating this pathology. One such therapeutic is the serine/threonine phosphatase inhibitor, LB100. LB100 is a water-soluble competitive protein phosphtase inhibitor that has demonstrated antitumor effects in preclinical and clinical trials. In this review, we aim to summarize current evidence demonstrating the efficacy of LB100 as an inhibitor of nervous system tumors. Furthermore, we review the involvement of the well-studied phosphatase, protein phosphatase 2A, in oncogenic cell signaling pathways, neurophysiology, and neurodevelopment. Abstract Protein phosphatase 2A (PP2A) is a ubiquitous serine/threonine phosphatase implicated in a wide variety of regulatory cellular functions. PP2A is abundant in the mammalian nervous system, and dysregulation of its cellular functions is associated with myriad neurodegenerative disorders. Additionally, PP2A has oncologic implications, recently garnering attention and emerging as a therapeutic target because of the antitumor effects of a potent PP2A inhibitor, LB100. LB100 abrogation of PP2A is believed to exert its inhibitory effects on tumor progression through cellular chemo- and radiosensitization to adjuvant agents. An updated and unifying review of PP2A biology and inhibition with LB100 as a therapeutic strategy for targeting cancers of the nervous system is needed, as other reviews have mainly covered broader applications of LB100. In this review, we discuss the role of PP2A in normal cells and tumor cells of the nervous system. Furthermore, we summarize current evidence regarding the therapeutic potential of LB100 for treating solid tumors of the nervous system.
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Affiliation(s)
- Jean-Paul Bryant
- Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA; (J.-P.B.); (J.H.)
| | - Adam Levy
- Miller School of Medicine, University of Miami, Miami, FL 33136, USA;
| | - John Heiss
- Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA; (J.-P.B.); (J.H.)
| | - Yeshavanth Kumar Banasavadi-Siddegowda
- Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA; (J.-P.B.); (J.H.)
- Correspondence: ; Tel.: +1-301-451-0970
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19
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Maggs L, Cattaneo G, Dal AE, Moghaddam AS, Ferrone S. CAR T Cell-Based Immunotherapy for the Treatment of Glioblastoma. Front Neurosci 2021; 15:662064. [PMID: 34113233 PMCID: PMC8185049 DOI: 10.3389/fnins.2021.662064] [Citation(s) in RCA: 82] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 04/14/2021] [Indexed: 12/25/2022] Open
Abstract
Glioblastoma multiforme (GBM) is the most common and aggressive malignant primary brain tumor in adults. Current treatment options typically consist of surgery followed by chemotherapy or more frequently radiotherapy, however, median patient survival remains at just over 1 year. Therefore, the need for novel curative therapies for GBM is vital. Characterization of GBM cells has contributed to identify several molecules as targets for immunotherapy-based treatments such as EGFR/EGFRvIII, IL13Rα2, B7-H3, and CSPG4. Cytotoxic T lymphocytes collected from a patient can be genetically modified to express a chimeric antigen receptor (CAR) specific for an identified tumor antigen (TA). These CAR T cells can then be re-administered to the patient to identify and eliminate cancer cells. The impressive clinical responses to TA-specific CAR T cell-based therapies in patients with hematological malignancies have generated a lot of interest in the application of this strategy with solid tumors including GBM. Several clinical trials are evaluating TA-specific CAR T cells to treat GBM. Unfortunately, the efficacy of CAR T cells against solid tumors has been limited due to several factors. These include the immunosuppressive tumor microenvironment, inadequate trafficking and infiltration of CAR T cells and their lack of persistence and activity. In particular, GBM has specific limitations to overcome including acquired resistance to therapy, limited diffusion across the blood brain barrier and risks of central nervous system toxicity. Here we review current CAR T cell-based approaches for the treatment of GBM and summarize the mechanisms being explored in pre-clinical, as well as clinical studies to improve their anti-tumor activity.
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Affiliation(s)
- Luke Maggs
- Department of Surgery, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
| | | | | | | | - Soldano Ferrone
- Department of Surgery, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
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20
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Shuhaibar LC, Kaci N, Egbert JR, Horville T, Loisay L, Vigone G, Uliasz TF, Dambroise E, Swingle MR, Honkanen RE, Biosse Duplan M, Jaffe LA, Legeai-Mallet L. Phosphatase inhibition by LB-100 enhances BMN-111 stimulation of bone growth. JCI Insight 2021; 6:141426. [PMID: 33986191 PMCID: PMC8262325 DOI: 10.1172/jci.insight.141426] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 03/25/2021] [Indexed: 12/16/2022] Open
Abstract
Activating mutations in fibroblast growth factor receptor 3 (FGFR3) and inactivating mutations in the natriuretic peptide receptor 2 (NPR2) guanylyl cyclase both result in decreased production of cyclic GMP in chondrocytes and severe short stature, causing achondroplasia (ACH) and acromesomelic dysplasia, type Maroteaux, respectively. Previously, we showed that an NPR2 agonist BMN-111 (vosoritide) increases bone growth in mice mimicking ACH (Fgfr3Y367C/+). Here, because FGFR3 signaling decreases NPR2 activity by dephosphorylating the NPR2 protein, we tested whether a phosphatase inhibitor (LB-100) could enhance BMN-111–stimulated bone growth in ACH. Measurements of cGMP production in chondrocytes of living tibias, and of NPR2 phosphorylation in primary chondrocytes, showed that LB-100 counteracted FGF-induced dephosphorylation and inactivation of NPR2. In ex vivo experiments with Fgfr3Y367C/+ mice, the combination of BMN-111 and LB-100 increased bone length and cartilage area, restored chondrocyte terminal differentiation, and increased the proliferative growth plate area, more than BMN-111 alone. The combination treatment also reduced the abnormal elevation of MAP kinase activity in the growth plate of Fgfr3Y367C/+ mice and improved the skull base anomalies. Our results provide a proof of concept that a phosphatase inhibitor could be used together with an NPR2 agonist to enhance cGMP production as a therapy for ACH.
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Affiliation(s)
- Leia C Shuhaibar
- Department of Cell Biology, University of Connecticut Health Center, Farmington Connecticut, USA
| | - Nabil Kaci
- Université de Paris, Imagine Institute, Laboratory of Molecular and Physiopathological Bases of Osteochondrodysplasia, INSERM UMR 1163, F‑75015, Paris, France.,Inovarion, F-75005 Paris, France
| | - Jeremy R Egbert
- Department of Cell Biology, University of Connecticut Health Center, Farmington Connecticut, USA
| | - Thibault Horville
- Université de Paris, Imagine Institute, Laboratory of Molecular and Physiopathological Bases of Osteochondrodysplasia, INSERM UMR 1163, F‑75015, Paris, France
| | - Léa Loisay
- Université de Paris, Imagine Institute, Laboratory of Molecular and Physiopathological Bases of Osteochondrodysplasia, INSERM UMR 1163, F‑75015, Paris, France
| | - Giulia Vigone
- Department of Cell Biology, University of Connecticut Health Center, Farmington Connecticut, USA
| | - Tracy F Uliasz
- Department of Cell Biology, University of Connecticut Health Center, Farmington Connecticut, USA
| | - Emilie Dambroise
- Université de Paris, Imagine Institute, Laboratory of Molecular and Physiopathological Bases of Osteochondrodysplasia, INSERM UMR 1163, F‑75015, Paris, France
| | - Mark R Swingle
- Department of Biochemistry and Molecular Biology, University of South Alabama, Mobile Alabama, USA
| | - Richard E Honkanen
- Department of Biochemistry and Molecular Biology, University of South Alabama, Mobile Alabama, USA
| | - Martin Biosse Duplan
- Université de Paris, Imagine Institute, Laboratory of Molecular and Physiopathological Bases of Osteochondrodysplasia, INSERM UMR 1163, F‑75015, Paris, France.,Service de Médecine Bucco-Dentaire, Hôpital Bretonneau, AP-HP, Paris, France
| | - Laurinda A Jaffe
- Department of Cell Biology, University of Connecticut Health Center, Farmington Connecticut, USA
| | - Laurence Legeai-Mallet
- Université de Paris, Imagine Institute, Laboratory of Molecular and Physiopathological Bases of Osteochondrodysplasia, INSERM UMR 1163, F‑75015, Paris, France
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21
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Poorebrahim M, Melief J, Pico de Coaña Y, L Wickström S, Cid-Arregui A, Kiessling R. Counteracting CAR T cell dysfunction. Oncogene 2021; 40:421-435. [PMID: 33168929 PMCID: PMC7808935 DOI: 10.1038/s41388-020-01501-x] [Citation(s) in RCA: 73] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 09/22/2020] [Accepted: 09/30/2020] [Indexed: 02/08/2023]
Abstract
In spite of high rates of complete remission following chimeric antigen receptor (CAR) T cell therapy, the efficacy of this approach is limited by generation of dysfunctional CAR T cells in vivo, conceivably induced by immunosuppressive tumor microenvironment (TME) and excessive antigen exposure. Exhaustion and senescence are two critical dysfunctional states that impose a pivotal hurdle for successful CAR T cell therapies. Recently, modified CAR T cells with an "exhaustion-resistant" phenotype have shown superior antitumor functions and prolonged lifespan. In addition, several studies have indicated the feasibility of senescence delay in CAR T cells. Here, we review the latest reports regarding blockade of CAR T cell exhaustion and senescence with a particular focus on the exhaustion-inducing pathways. Subsequently, we describe what potential these latest insights offer for boosting the potency of adoptive cell transfer (ACT) therapies involving CAR T cells. Furthermore, we discuss how induction of costimulation, cytokine exposure, and TME modulation can impact on CAR T cell efficacy and persistence, while potential safety issues associated with reinvigorated CAR T cells will also be addressed.
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Affiliation(s)
- Mansour Poorebrahim
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden. .,Targeted Tumor Vaccines Group, Clinical Cooperation Unit Applied Tumor Immunity, German Cancer Research Center (DKFZ), Heidelberg, Germany.
| | - Jeroen Melief
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
| | - Yago Pico de Coaña
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
| | - Stina L Wickström
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
| | - Angel Cid-Arregui
- Targeted Tumor Vaccines Group, Clinical Cooperation Unit Applied Tumor Immunity, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Rolf Kiessling
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden.
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22
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Guo F, Cui J. CAR-T in solid tumors: Blazing a new trail through the brambles. Life Sci 2020; 260:118300. [DOI: 10.1016/j.lfs.2020.118300] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 07/31/2020] [Accepted: 08/13/2020] [Indexed: 02/07/2023]
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23
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Subbiah S, Nam A, Garg N, Behal A, Kulkarni P, Salgia R. Small Cell Lung Cancer from Traditional to Innovative Therapeutics: Building a Comprehensive Network to Optimize Clinical and Translational Research. J Clin Med 2020; 9:jcm9082433. [PMID: 32751469 PMCID: PMC7464169 DOI: 10.3390/jcm9082433] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 07/27/2020] [Accepted: 07/28/2020] [Indexed: 12/23/2022] Open
Abstract
Small cell lung cancer (SCLC) is an aggressive, complex disease with a distinct biology that contributes to its poor prognosis. Management of SCLC is still widely limited to chemotherapy and radiation therapy, and research recruitment still poses a considerable challenge. Here, we review the current standard of care for SCLC and advances made in utilizing immunotherapy. We also highlight research in the development of targeted therapies and emphasize the importance of a team-based approach to make clinical advances. Building an integrative network between an academic site and community practice sites optimizes biomarker and drug target discovery for managing and treating a difficult disease like SCLC.
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Wu L, Wei Q, Brzostek J, Gascoigne NRJ. Signaling from T cell receptors (TCRs) and chimeric antigen receptors (CARs) on T cells. Cell Mol Immunol 2020; 17:600-612. [PMID: 32451454 DOI: 10.1038/s41423-020-0470-3] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 05/05/2020] [Indexed: 12/15/2022] Open
Abstract
T cells react to foreign or self-antigens through T cell receptor (TCR) signaling. Several decades of research have delineated the mechanism of TCR signal transduction and its impact on T cell performance. This knowledge provides the foundation for chimeric antigen receptor T cell (CAR-T cell) technology, by which T cells are redirected in a major histocompatibility complex-unrestricted manner. TCR and CAR signaling plays a critical role in determining the T cell state, including exhaustion and memory. Given its artificial nature, CARs might affect or rewire signaling differently than TCRs. A better understanding of CAR signal transduction would greatly facilitate improvements to CAR-T cell technology and advance its usefulness in clinical practice. Herein, we systematically review the knowns and unknowns of TCR and CAR signaling, from the contact of receptors and antigens, proximal signaling, immunological synapse formation, and late signaling outcomes. Signaling through different T cell subtypes and how signaling is translated into practice are also discussed.
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Affiliation(s)
- Ling Wu
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Singapore, 117545, Singapore
| | - Qianru Wei
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Singapore, 117545, Singapore
| | - Joanna Brzostek
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Singapore, 117545, Singapore
| | - Nicholas R J Gascoigne
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Singapore, 117545, Singapore. .,Immunology Programme, Life Sciences Institute, National University of Singapore, Singapore, Singapore.
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Maggio D, Ho WS, Breese R, Walbridge S, Wang H, Cui J, Heiss JD, Gilbert MR, Kovach JS, Lu RO, Zhuang Z. Inhibition of protein phosphatase-2A with LB-100 enhances antitumor immunity against glioblastoma. J Neurooncol 2020; 148:231-244. [PMID: 32342332 DOI: 10.1007/s11060-020-03517-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 04/23/2020] [Indexed: 12/13/2022]
Abstract
PURPOSE Glioblastoma (GBM) carries a dismal prognosis despite standard multimodal treatment with surgery, chemotherapy and radiation. Immune checkpoint inhibitors, such as PD1 blockade, for treatment of GBM failed to show clinical benefit. Rational combination strategies to overcome resistance of GBM to checkpoint monotherapy are needed to extend the promise of immunotherapy to GBM management. Emerging evidence suggests that protein phosphatase 2A (PP2A) plays a critical role in the signal transduction pathways of both adaptive and innate immune cells and that inhibition of PP2A could enhance cancer immunity. We investigated the use of a PP2A inhibitor, LB-100, to enhance antitumor efficacy of PD1 blockade in a syngeneic glioma model. METHODS C57BL/6 mice were implanted with murine glioma cell line GL261-luc or GL261-WT and randomized into 4 treatment arms: (i) control, (ii) LB-100, (iii) PD1 blockade and (iv) combination. Survival was assessed and detailed profiling of tumor infiltrating leukocytes was performed. RESULTS Dual PP2A and PD1 blockade significantly improved survival compared with monotherapy alone. Combination therapy resulted in complete regression of tumors in about 25% of mice. This effect was dependent on CD4 and CD8 T cells and cured mice established antigen-specific secondary protective immunity. Analysis of tumor lymphocytes demonstrated enhanced CD8 infiltration and effector function. CONCLUSION This is the first preclinical investigation of the effect of combining PP2A inhibition with PD1 blockade for GBM. This novel combination provided effective tumor immunotherapy and long-term survival in our animal GBM model.
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Affiliation(s)
- Dominic Maggio
- Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Winson S Ho
- Department of Neurosurgery, Dell Medical School, University of Texas at Austin, Austin, TX, 78701, USA.
- University of Texas at Austin, 1601 Trinity St, Bldg. B HDB 3.214, Austin, TX, 78701, USA.
| | - Rebecca Breese
- Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Stuart Walbridge
- Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Herui Wang
- Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Jing Cui
- Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - John D Heiss
- Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Mark R Gilbert
- Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - John S Kovach
- Lixte Biotechnology Holdings, Inc., East Setauket, NY, 11733, USA
| | - Rongze O Lu
- Department of Neurosurgery, Dell Medical School, University of Texas at Austin, Austin, TX, 78701, USA.
- University of Texas at Austin, 1601 Trinity St, Bldg. B HDB 3.216, Austin, TX, 78701, USA.
| | - Zhengping Zhuang
- Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20892, USA.
- National Institutes of Health, BLDG 35, Rm 2B203, Bethesda, MD, 20892, USA.
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