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Qiu Z, Yu Z, Xu T, Wang L, Meng N, Jin H, Xu B. Novel Nano-Drug Delivery System for Brain Tumor Treatment. Cells 2022; 11:cells11233761. [PMID: 36497021 PMCID: PMC9737081 DOI: 10.3390/cells11233761] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/21/2022] [Accepted: 11/23/2022] [Indexed: 11/26/2022] Open
Abstract
As the most dangerous tumors, brain tumors are usually treated with surgical removal, radiation therapy, and chemotherapy. However, due to the aggressive growth of gliomas and their resistance to conventional chemoradiotherapy, it is difficult to cure brain tumors by conventional means. In addition, the higher dose requirement of chemotherapeutic drugs caused by the blood-brain barrier (BBB) and the untargeted nature of the drug inevitably leads to low efficacy and systemic toxicity of chemotherapy. In recent years, nanodrug carriers have attracted extensive attention because of their superior drug transport capacity and easy-to-control properties. This review systematically summarizes the major strategies of novel nano-drug delivery systems for the treatment of brain tumors in recent years that cross the BBB and enhance brain targeting, and compares the advantages and disadvantages of several strategies.
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Affiliation(s)
- Ziyi Qiu
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-Sen University, Shenzhen 518107, China
- School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Zhenhua Yu
- Sun Yat-Sen University First Affiliated Hospital, Guangzhou 510060, China
| | - Ting Xu
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-Sen University, Shenzhen 518107, China
- School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Liuyou Wang
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-Sen University, Shenzhen 518107, China
- School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Nanxin Meng
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-Sen University, Shenzhen 518107, China
- School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Huawei Jin
- Sun Yat-Sen University First Affiliated Hospital, Guangzhou 510060, China
- Correspondence: (H.J.); (B.X.)
| | - Bingzhe Xu
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-Sen University, Shenzhen 518107, China
- School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
- Correspondence: (H.J.); (B.X.)
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Dialogue among Lymphocytes and Microglia in Glioblastoma Microenvironment. Cancers (Basel) 2022; 14:cancers14112632. [PMID: 35681612 PMCID: PMC9179556 DOI: 10.3390/cancers14112632] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 05/24/2022] [Accepted: 05/25/2022] [Indexed: 02/06/2023] Open
Abstract
Simple Summary In this review, we summarize in vitro and in vivo studies related to glioblastoma models and human patients to outline the symbiotic bidirectional interaction between microglia, lymphocytes, and tumor cells that develops during tumor progression. Particularly, we highlight the current experimental therapeutic approaches that aim to shape these interplays, such as adeno-associated virus (AAV) delivery and CAR-T and -NK cell infusion, and to modulate the tumor microenvironment in an anti-tumoral way, thus counteracting glioblastoma growth. Abstract Microglia and lymphocytes are fundamental constituents of the glioblastoma microenvironment. In this review, we summarize the current state-of-the-art knowledge of the microglial role played in promoting the development and aggressive hallmarks of this deadly brain tumor. Particularly, we report in vitro and in vivo studies related to glioblastoma models and human patients to outline the symbiotic bidirectional interaction between microglia, lymphocytes, and tumor cells that develops during tumor progression. Furthermore, we highlight the current experimental therapeutic approaches that aim to shape these interplays, such as adeno-associated virus (AAV) delivery and CAR-T and -NK cell infusion, and to modulate the tumor microenvironment in an anti-tumoral way, thus counteracting glioblastoma growth.
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Banerjee K, Núñez FJ, Haase S, McClellan BL, Faisal SM, Carney SV, Yu J, Alghamri MS, Asad AS, Candia AJN, Varela ML, Candolfi M, Lowenstein PR, Castro MG. Current Approaches for Glioma Gene Therapy and Virotherapy. Front Mol Neurosci 2021; 14:621831. [PMID: 33790740 PMCID: PMC8006286 DOI: 10.3389/fnmol.2021.621831] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 02/16/2021] [Indexed: 12/13/2022] Open
Abstract
Glioblastoma (GBM) is the most common and aggressive primary brain tumor in the adult population and it carries a dismal prognosis. Inefficient drug delivery across the blood brain barrier (BBB), an immunosuppressive tumor microenvironment (TME) and development of drug resistance are key barriers to successful glioma treatment. Since gliomas occur through sequential acquisition of genetic alterations, gene therapy, which enables to modification of the genetic make-up of target cells, appears to be a promising approach to overcome the obstacles encountered by current therapeutic strategies. Gene therapy is a rapidly evolving field with the ultimate goal of achieving specific delivery of therapeutic molecules using either viral or non-viral delivery vehicles. Gene therapy can also be used to enhance immune responses to tumor antigens, reprogram the TME aiming at blocking glioma-mediated immunosuppression and normalize angiogenesis. Nano-particles-mediated gene therapy is currently being developed to overcome the BBB for glioma treatment. Another approach to enhance the anti-glioma efficacy is the implementation of viro-immunotherapy using oncolytic viruses, which are immunogenic. Oncolytic viruses kill tumor cells due to cancer cell-specific viral replication, and can also initiate an anti-tumor immunity. However, concerns still remain related to off target effects, and therapeutic and transduction efficiency. In this review, we describe the rationale and strategies as well as advantages and disadvantages of current gene therapy approaches against gliomas in clinical and preclinical studies. This includes different delivery systems comprising of viral, and non-viral delivery platforms along with suicide/prodrug, oncolytic, cytokine, and tumor suppressor-mediated gene therapy approaches. In addition, advances in glioma treatment through BBB-disruptive gene therapy and anti-EGFRvIII/VEGFR gene therapy are also discussed. Finally, we discuss the results of gene therapy-mediated human clinical trials for gliomas. In summary, we highlight the progress, prospects and remaining challenges of gene therapies aiming at broadening our understanding and highlighting the therapeutic arsenal for GBM.
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Affiliation(s)
- Kaushik Banerjee
- Department of Neurosurgery, University of Michigan Medical School, Ann Arbor, MI, United States
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Felipe J. Núñez
- Laboratory of Molecular and Cellular Therapy, Fundación Instituto Leloir, Buenos Aires, Argentina
| | - Santiago Haase
- Department of Neurosurgery, University of Michigan Medical School, Ann Arbor, MI, United States
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Brandon L. McClellan
- Department of Neurosurgery, University of Michigan Medical School, Ann Arbor, MI, United States
- Immunology Graduate Program, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Syed M. Faisal
- Department of Neurosurgery, University of Michigan Medical School, Ann Arbor, MI, United States
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Stephen V. Carney
- Department of Neurosurgery, University of Michigan Medical School, Ann Arbor, MI, United States
- Cancer Biology Graduate Program, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Jin Yu
- Department of Neurosurgery, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Mahmoud S. Alghamri
- Department of Neurosurgery, University of Michigan Medical School, Ann Arbor, MI, United States
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Antonela S. Asad
- Departamento de Biología e Histología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Alejandro J. Nicola Candia
- Departamento de Biología e Histología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Maria Luisa Varela
- Department of Neurosurgery, University of Michigan Medical School, Ann Arbor, MI, United States
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Marianela Candolfi
- Departamento de Biología e Histología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Pedro R. Lowenstein
- Department of Neurosurgery, University of Michigan Medical School, Ann Arbor, MI, United States
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Maria G. Castro
- Department of Neurosurgery, University of Michigan Medical School, Ann Arbor, MI, United States
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, United States
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Xu X, Chen W, Zhu W, Chen J, Ma B, Ding J, Wang Z, Li Y, Wang Y, Zhang X. Adeno-associated virus (AAV)-based gene therapy for glioblastoma. Cancer Cell Int 2021; 21:76. [PMID: 33499886 PMCID: PMC7836184 DOI: 10.1186/s12935-021-01776-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 01/16/2021] [Indexed: 02/07/2023] Open
Abstract
Glioblastoma (GBM) is the most common and malignant Grade IV primary craniocerebral tumor caused by glial cell carcinogenesis with an extremely poor median survival of 12–18 months. The current standard treatments for GBM, including surgical resection followed by chemotherapy and radiotherapy, fail to substantially prolong survival outcomes. Adeno-associated virus (AAV)-mediated gene therapy has recently attracted considerable interest because of its relatively low cytotoxicity, poor immunogenicity, broad tissue tropism, and long-term stable transgene expression. Furthermore, a range of gene therapy trials using AAV as vehicles are being investigated to thwart deadly GBM in mice models. At present, AAV is delivered to the brain by local injection, intracerebroventricular (ICV) injection, or systematic injection to treat experimental GBM mice model. In this review, we summarized the experimental trials of AAV-based gene therapy as GBM treatment and compared the advantages and disadvantages of different AAV injection approaches. We systematically introduced the prospect of the systematic injection of AAV as an approach for AAV-based gene therapy for GBM.
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Affiliation(s)
- Xin Xu
- School of Medicine, Jiangsu University, Zhenjiang, 212013, Jiangsu, China.
| | - Wenli Chen
- Department of Neurosurgery and Pituitary Tumor Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Wenjun Zhu
- Department of Laboratory Medicine, The Second People's Hospital of Lianyungang, Lianyungang, 222006, China
| | - Jing Chen
- School of Medicine, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Bin Ma
- School of Medicine, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Jianxia Ding
- School of Medicine, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Zaichuan Wang
- School of Medicine, Yangzhou University, Yangzhou, 225600, China
| | - Yifei Li
- School of Medicine, Yangzhou University, Yangzhou, 225600, China
| | - Yeming Wang
- Department of Hepatobiliary Surgery, The Second People's Hospital of Lianyungang, Lianyungang, 222006, Jiangsu, China.
| | - Xiaochun Zhang
- School of Medicine, Yangzhou University, Yangzhou, 225600, China. .,Department of Oncology, Yangzhou Traditional Chinese Medical Hospital, Yangzhou, 225600, Jiangsu, China.
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H1/pHGFK1 nanoparticles exert anti-tumoural and radiosensitising effects by inhibition of MET in glioblastoma. Br J Cancer 2018; 118:522-533. [PMID: 29348487 PMCID: PMC5830599 DOI: 10.1038/bjc.2017.461] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2017] [Revised: 11/23/2017] [Accepted: 11/23/2017] [Indexed: 12/20/2022] Open
Abstract
Background: The therapeutic resistance to ionising radiation (IR) and anti-angiogenesis mainly impair the prognosis of patients with glioblastoma. The primary and secondary MET aberrant activation is one crucial factor for these resistances. The kringle 1 domain of hepatocyte growth factor (HGFK1), an angiogenic inhibitor, contains a high-affinity binding domain of MET; however, its effects on glioblastoma remain elusive. Methods: We formed the nanoparticles consisting of a folate receptor-targeted nanoparticle-mediated HGFK1 gene (H1/pHGFK1) and studied its anti-tumoural and radiosensitive activities in both subcutaneous and orthotopic human glioma cell-xenografted mouse models. We then elucidated its molecular mechanisms in human glioblastoma cell lines in vitro. Results: We demonstrated for the first time that peritumoural injection of H1/pHGFK1 nanoparticles significantly inhibited tumour growth and prolonged survival in tumour-bearing mice, as well as enhanced the anti-tumoural efficacies of IR in vivo by reducing Ki-67 expression, enhancing TUNEL staining-indicated apoptotic indexes, reducing microvascular intensity and reversing IR-induced MET overexpression in tumour tissues. Furthermore, we showed that HGFK1 suppressed the proliferation and induced cell apoptosis and enhanced sensitivity to IR in glioblastoma cell lines, mainly by suppressing the activities of MET receptor, down-regulating ATM-Chk2 axis but up-regulating Chk1. Conclusions: H1/pHGFK1 exerts anti-tumoural and radiosensitive activities mainly through the inhibition and reversal of IR-induced MET and ATM–Chk2 axis activities in glioblastoma. H1/pHGFK1 nanoparticles are a potential radiosensitiser and angiogenic inhibitor for glioblastoma treatment.
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Xiang H, Xu H, Fan F, Shin SM, Hogan QH, Yu H. Glial fibrillary acidic protein promoter determines transgene expression in satellite glial cells following intraganglionic adeno-associated virus delivery in adult rats. J Neurosci Res 2017; 96:436-448. [PMID: 28941260 DOI: 10.1002/jnr.24183] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 08/25/2017] [Accepted: 09/05/2017] [Indexed: 12/24/2022]
Abstract
Recombinant adeno-associated viral (AAV)-mediated therapeutic gene transfer to dorsal root ganglia (DRG) is an effective and safe tool for treating chronic pain. However, AAV with various constitutively active promoters leads to transgene expression predominantly to neurons, while glial cells are refractory to AAV transduction in the peripheral nervous system. The present study evaluated whether in vivo satellite glial cell (SGC) transduction in the DRG can be enhanced by the SGC-specific GFAP promoter and by using shH10 and shH19, which are engineered capsid variants with Müller glia-prone transduction. Titer-matched AAV6 (as control), AAVshH10, and AAVshH19, all encoding the EGFP driven by the constitutively active CMV promoter, as well as AAV6-EGFP and AAVshH10-EGFP driven by a GFAP promoter (AAV6-GFAP-EGFP and AAVshH10-GFAP-EGFP), were injected into DRG of adult male rats. Neurotropism of gene expression was determined and compared by immunohistochemistry. Results showed that injection of AAV6- and AAVshH10-GFAP-EGFP induces robust EGFP expression selectively in SGCs, whereas injection of either AAVshH10-CMV-EGFP or AAVshH19-CMV-EGFP into DRG resulted in a similar in vivo transduction profile to AAV6-CMV-EGFP, all showing efficient transduction of sensory neurons without significant transduction of glial cell populations. Coinjection of AAV6-CMV-mCherry and AAV6-GFAP-EGFP induces transgene expression in neurons and SGCs separately. This report, together with our prior studies, demonstrates that the GFAP promoter rather than capsid tropism determines selective gene expression in SGCs following intraganglionic AAV delivery in adult rats. A dual AAV system, one with GFAP promoter and the other with CMV promoter, can efficiently express transgenes selectively in neurons versus SGCs.
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Affiliation(s)
- Hongfei Xiang
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Orthopedic Surgery, Affiliated Hospital of Qingdao University, Qingdao, People's Republic of China
| | - Hao Xu
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Orthopedic Surgery, Affiliated Hospital of Qingdao University, Qingdao, People's Republic of China
| | - Fan Fan
- Department of Pharmacology and Toxicology, Mississippi University Medical Center, Jackson, Mississippi
| | - Seung-Min Shin
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Quinn H Hogan
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, Wisconsin.,Zablocki Veterans Affairs Medical Center, Milwaukee, Wisconsin
| | - Hongwei Yu
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, Wisconsin.,Zablocki Veterans Affairs Medical Center, Milwaukee, Wisconsin
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Castle MJ, Turunen HT, Vandenberghe LH, Wolfe JH. Controlling AAV Tropism in the Nervous System with Natural and Engineered Capsids. Methods Mol Biol 2016; 1382:133-49. [PMID: 26611584 PMCID: PMC4993104 DOI: 10.1007/978-1-4939-3271-9_10] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
More than one hundred naturally occurring variants of adeno-associated virus (AAV) have been identified, and this library has been further expanded by an array of techniques for modification of the viral capsid. AAV capsid variants possess unique antigenic profiles and demonstrate distinct cellular tropisms driven by differences in receptor binding. AAV capsids can be chemically modified to alter tropism, can be produced as hybrid vectors that combine the properties of multiple serotypes, and can carry peptide insertions that introduce novel receptor-binding activity. Furthermore, directed evolution of shuffled genome libraries can identify engineered variants with unique properties, and rational modification of the viral capsid can alter tropism, reduce blockage by neutralizing antibodies, or enhance transduction efficiency. This large number of AAV variants and engineered capsids provides a varied toolkit for gene delivery to the CNS and retina, with specialized vectors available for many applications, but selecting a capsid variant from the array of available vectors can be difficult. This chapter describes the unique properties of a range of AAV variants and engineered capsids, and provides a guide for selecting the appropriate vector for specific applications in the CNS and retina.
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Affiliation(s)
- Michael J Castle
- Research Institute of the Children's Hospital of Philadelphia, 502-G Abramson Pediatric Research Building, 3615 Civic Center Boulevard, Philadelphia, PA, 19104, USA
- Department of Neurosciences, University of California-San Diego, La Jolla, CA, 92093, USA
| | - Heikki T Turunen
- Department of Ophthalmology, Schepens Eye Research Institute, Massachusetts Eye and Ear Hospital, Harvard Medical School, Boston, MA, 02114, USA
| | - Luk H Vandenberghe
- Department of Ophthalmology, Schepens Eye Research Institute, Massachusetts Eye and Ear Hospital, Harvard Medical School, Boston, MA, 02114, USA
| | - John H Wolfe
- Research Institute of the Children's Hospital of Philadelphia, 502-G Abramson Pediatric Research Building, 3615 Civic Center Boulevard, Philadelphia, PA, 19104, USA.
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA.
- W.F. Goodman Center for Comparative Medical Genetics, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA.
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Zhao X, Zou Y, Gu Q, Zhao G, Gray H, Pfeffer LM, Yue J. Lentiviral Vector Mediated Claudin1 Silencing Inhibits Epithelial to Mesenchymal Transition in Breast Cancer Cells. Viruses 2015; 7:2965-79. [PMID: 26067567 PMCID: PMC4488722 DOI: 10.3390/v7062755] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 03/31/2015] [Accepted: 06/04/2015] [Indexed: 12/20/2022] Open
Abstract
Breast cancer has a high incidence and mortality rate worldwide. Several viral vectors including lentiviral, adenoviral and adeno-associated viral vectors have been used in gene therapy for various forms of human cancer, and have shown promising effects in controlling tumor development. Claudin1 (CLDN1) is a member of the tetraspan transmembrane protein family that plays a major role in tight junctions and is associated with tumor metastasis. However, the role of CLDN1 in breast cancer is largely unexplored. In this study, we tested the therapeutic potential of silencing CLDN1 expression in two breast cancer (MDA-MB-231 and MCF7) cell lines using lentiviral vector mediated RNA interference. We found that a CLDN1 short hairpin (shRNA) construct efficiently silenced CLDN1 expression in both breast cancer cell lines, and CLDN1 knockdown resulted in reduced cell proliferation, survival, migration and invasion. Furthermore, silencing CLDN1 inhibited epithelial to mesenchymal transition (EMT) by upregulating the epithelial cell marker, E-cadherin, and downregulating mesenchymal markers, smooth muscle cell alpha-actin (SMA) and Snai2. Our data demonstrated that lentiviral vector mediated CLDN1 RNA interference has great potential in breast cancer gene therapy by inhibiting EMT and controlling tumor cell growth.
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Affiliation(s)
- Xianqi Zhao
- Department of Medicine, Harbin Medical University, Harbin 150086, China.
- Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA.
- Center for Cancer Research, University of Tennessee Health Science Center, 19 S. Manassas St., Rm. 266, Memphis, TN 38163, USA.
| | - Yanan Zou
- Department of Medicine, Harbin Medical University, Harbin 150086, China.
- Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA.
- Center for Cancer Research, University of Tennessee Health Science Center, 19 S. Manassas St., Rm. 266, Memphis, TN 38163, USA.
| | - Qingqing Gu
- Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA.
- Center for Cancer Research, University of Tennessee Health Science Center, 19 S. Manassas St., Rm. 266, Memphis, TN 38163, USA.
| | - Guannan Zhao
- Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA.
- Center for Cancer Research, University of Tennessee Health Science Center, 19 S. Manassas St., Rm. 266, Memphis, TN 38163, USA.
| | - Horace Gray
- Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA.
- Center for Cancer Research, University of Tennessee Health Science Center, 19 S. Manassas St., Rm. 266, Memphis, TN 38163, USA.
| | - Lawrence M Pfeffer
- Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA.
- Center for Cancer Research, University of Tennessee Health Science Center, 19 S. Manassas St., Rm. 266, Memphis, TN 38163, USA.
| | - Junming Yue
- Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA.
- Center for Cancer Research, University of Tennessee Health Science Center, 19 S. Manassas St., Rm. 266, Memphis, TN 38163, USA.
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