1
|
Marlin MC, Stephens T, Wright C, Smith M, Wright K, Guthridge JM. A novel process for H&E, immunofluorescence, and imaging mass cytometry on a single slide with a concise analytics pipeline. Cytometry A 2023; 103:1010-1018. [PMID: 37724720 DOI: 10.1002/cyto.a.24789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 08/04/2023] [Accepted: 08/24/2023] [Indexed: 09/21/2023]
Abstract
Imaging mass cytometry (IMC) is a powerful spatial technology that utilizes cytometry time of flight to acquire multiplexed image datasets with up to 40 markers, via metal-tagged antibodies. Recent advances in IMC have led to the inclusion of RNAScope probes and multiple new analysis pipelines have led to faster analyses and better results. However, IMC still suffers from lower resolution (1 μm2 pixels) and relatively small regions of interest (ROIs) (<2 mm2 ) compared to other, light-based microscope technologies. Capturing higher-resolution images on serial sections causes great difficulty when attempting to align cells and structures across serial sections, especially when observing smaller cell types and structures. Therefore, we demonstrate the combination of H&E and multiplex immunofluorescence imaging, for much higher resolution of the structural and cellular compartments found throughout the entire tissue section, with the high-dimensionality of IMC for specific ROIs on a single slide. Additionally, we demonstrate a simple and effective open-source cell segmentation and IMC analysis pipeline with previously published and freely available software.
Collapse
Affiliation(s)
- M Caleb Marlin
- Arthritis & Clinical Immunology, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
| | - Tayte Stephens
- Arthritis & Clinical Immunology, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
| | - Christian Wright
- Arthritis & Clinical Immunology, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
| | - Miles Smith
- Arthritis & Clinical Immunology, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
| | - Kyle Wright
- Department of Surgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Joel M Guthridge
- Arthritis & Clinical Immunology, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
- Department of Pathology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| |
Collapse
|
2
|
South SM, Marlin MC, Mehta-D'souza P, Stephens T, Conner T, Burt KG, Guthridge JM, Scanzello CR, Griffin TM. Imaging mass cytometry reveals tissue-specific cellular immune phenotypes in the mouse knee following ACL injury. Osteoarthr Cartil Open 2023; 5:100416. [PMID: 38107076 PMCID: PMC10724482 DOI: 10.1016/j.ocarto.2023.100416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 11/13/2023] [Indexed: 12/19/2023] Open
Abstract
Objective To develop an imaging mass cytometry method for identifying complex cell phenotypes, inter-cellular interactions, and population changes in the synovium and infrapatellar fat pad (IFP) of the mouse knee following a non-invasive compression injury. Design Fifteen male C57BL/6 mice were fed a high-fat diet for 8 weeks prior to random assignment to sham, 0.88 mm, or 1.7 mm knee compression displacement at 24 weeks of age. 2-weeks after loading, limbs were prepared for histologic and imaging mass cytometry analysis, focusing on myeloid immune cell populations in the synovium and IFP. Results 1.7 mm compression caused anterior cruciate ligament (ACL) rupture, development of post-traumatic osteoarthritis, and a 2- to 3-fold increase in cellularity of synovium and IFP tissues compared to sham or 0.88 mm compression. Imaging mass cytometry identified 11 myeloid cell subpopulations in synovium and 7 in IFP, of which approximately half were elevated 2 weeks after ACL injury in association with the vasculature. Notably, two monocyte/macrophage subpopulations and an MHC IIhi population were elevated 2-weeks post-injury in the synovium but not IFP. Vascular and immune cell interactions were particularly diverse in the synovium, incorporating 8 unique combinations of 5 myeloid cell populations, including a monocyte/macrophage population, an MHC IIhi population, and 3 different undefined F4/80+ myeloid populations. Conclusions Developing an imaging mass cytometry method for the mouse enabled us to identify a diverse array of synovial and IFP vascular-associated myeloid cell subpopulations. These subpopulations were differentially elevated in synovial and IFP tissues 2-weeks post injury, providing new details on tissue-specific immune regulation.
Collapse
Affiliation(s)
- Sanique M. South
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, 73104, USA
- Phil and Penny Knight Campus for Accelerating Scientific Impact, University of Oregon, Eugene, OR, 97403, USA
| | - M. Caleb Marlin
- Arthritis and Clinical Immunology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, 73104, USA
| | - Padmaja Mehta-D'souza
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, 73104, USA
| | - Tayte Stephens
- Arthritis and Clinical Immunology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, 73104, USA
| | - Taylor Conner
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, 73104, USA
| | - Kevin G. Burt
- Translational Musculoskeletal Research Center & Department of Medicine, Corporal Michael J. Crescenz Department of Veterans Affairs Medical Center, Philadelphia, PA, 19104, USA
- Division of Rheumatology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, 19104, USA
| | - Joel M. Guthridge
- Arthritis and Clinical Immunology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, 73104, USA
| | - Carla R. Scanzello
- Translational Musculoskeletal Research Center & Department of Medicine, Corporal Michael J. Crescenz Department of Veterans Affairs Medical Center, Philadelphia, PA, 19104, USA
- Division of Rheumatology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, 19104, USA
| | - Timothy M. Griffin
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, 73104, USA
- Oklahoma City VA Health Care System, Oklahoma City, OK, 73104, USA
- Oklahoma Center for Geroscience and the Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA
| |
Collapse
|
3
|
Bennett SJ, Davila CA, Reyes Z, Valentín-Acevedo A, Carrasco KG, Abadie R, Marlin MC, Beel M, Chapple AG, Fernando S, Guthridge JM, Chiou KS, Dombrowski K, West JT, Wood C. Immune profiling in Puerto Rican injection drug users with and without HIV-1 infection. J Leukoc Biol 2023; 114:142-153. [PMID: 37042743 PMCID: PMC10776106 DOI: 10.1093/jleuko/qiad045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 04/05/2023] [Accepted: 04/06/2023] [Indexed: 04/13/2023] Open
Abstract
Antiretroviral therapy has been effective in suppressing HIV viral load and enabling people living with HIV to experience longer, more conventional lives. However, as people living with HIV are living longer, they are developing aging-related diseases prematurely and are more susceptible to comorbidities that have been linked to chronic inflammation. Coincident with HIV infection and aging, drug abuse has also been independently associated with gut dysbiosis, microbial translocation, and inflammation. Here, we hypothesized that injection drug use would exacerbate HIV-induced immune activation and inflammation, thereby intensifying immune dysfunction. We recruited 50 individuals not using injection drugs (36/50 HIV+) and 47 people who inject drugs (PWID, 12/47 HIV+). All but 3 of the HIV+ subjects were on antiretroviral therapy. Plasma immune profiles were characterized by immunoproteomics, and cellular immunophenotypes were assessed using mass cytometry. The immune profiles of HIV+/PWID-, HIV-/PWID+, and HIV+/PWID+ were each significantly different from controls; however, few differences between these groups were detected, and only 3 inflammatory mediators and 2 immune cell populations demonstrated a combinatorial effect of injection drug use and HIV infection. In conclusion, a comprehensive analysis of inflammatory mediators and cell immunophenotypes revealed remarkably similar patterns of immune dysfunction in HIV-infected individuals and in people who inject drugs with and without HIV-1 infection.
Collapse
Affiliation(s)
- Sydney J. Bennett
- School of Biological Sciences, University of Nebraska–Lincoln, 1104 T St, Lincoln, NE 68588, United States
- Department of Interdisciplinary Oncology, Louisiana State University Health Sciences Center, Louisiana Cancer Research Center, 1700 Tulane Ave, New Orleans, LA 70112, United States
| | - Carmen Ana Davila
- Department of Sociology, University of Nebraska–Lincoln, 660 N 12th St, Lincoln, NE 68588, United States
| | - Zahiraliz Reyes
- Department of Microbiology and Immunology, Universidad Central del Caribe, PO Box 60327, Bayamón, Puerto Rico 00960, United States
| | - Aníbal Valentín-Acevedo
- Department of Microbiology and Immunology, Universidad Central del Caribe, PO Box 60327, Bayamón, Puerto Rico 00960, United States
| | - Kim Gocchi Carrasco
- Department of Sociology, University of Nebraska–Lincoln, 660 N 12th St, Lincoln, NE 68588, United States
| | - Roberto Abadie
- Department of Sociology, University of Nebraska–Lincoln, 660 N 12th St, Lincoln, NE 68588, United States
| | - M. Caleb Marlin
- Arthritis & Clinical Immunology, Oklahoma Medical Research Foundation, 825 NE 13th St, Oklahoma City, OK 73104, United States
| | - Marci Beel
- Arthritis & Clinical Immunology, Oklahoma Medical Research Foundation, 825 NE 13th St, Oklahoma City, OK 73104, United States
| | - Andrew G. Chapple
- Department of Interdisciplinary Oncology, Louisiana State University Health Sciences Center, Louisiana Cancer Research Center, 1700 Tulane Ave, New Orleans, LA 70112, United States
| | - Samodha Fernando
- Department of Animal Science, University of Nebraska–Lincoln, 3940 Fair St, Lincoln, NE 68503, United States
| | - Joel M. Guthridge
- Arthritis & Clinical Immunology, Oklahoma Medical Research Foundation, 825 NE 13th St, Oklahoma City, OK 73104, United States
- Department of Pathology, University of Oklahoma Health Sciences Center, 940 Stanton L. Young Blvd, Oklahoma City, OK 73104, United States
| | - Kathy S. Chiou
- Department of Psychology, University of Nebraska–Lincoln, 1220 T St, Lincoln, NE 68588, United States
| | - Kirk Dombrowski
- University of Vermont, 5 South Prospect St, Burlington, VT 05405, United States
| | - John T. West
- Department of Interdisciplinary Oncology, Louisiana State University Health Sciences Center, Louisiana Cancer Research Center, 1700 Tulane Ave, New Orleans, LA 70112, United States
| | - Charles Wood
- Department of Interdisciplinary Oncology, Louisiana State University Health Sciences Center, Louisiana Cancer Research Center, 1700 Tulane Ave, New Orleans, LA 70112, United States
| |
Collapse
|
4
|
Wang AZ, Bowman-Kirigin JA, Desai R, Kang LI, Patel PR, Patel B, Khan SM, Bender D, Marlin MC, Liu J, Osbun JW, Leuthardt EC, Chicoine MR, Dacey RG, Zipfel GJ, Kim AH, DeNardo DG, Petti AA, Dunn GP. Single-cell profiling of human dura and meningioma reveals cellular meningeal landscape and insights into meningioma immune response. Genome Med 2022; 14:49. [PMID: 35534852 PMCID: PMC9088131 DOI: 10.1186/s13073-022-01051-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Accepted: 04/21/2022] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Recent investigations of the meninges have highlighted the importance of the dura layer in central nervous system immune surveillance beyond a purely structural role. However, our understanding of the meninges largely stems from the use of pre-clinical models rather than human samples. METHODS Single-cell RNA sequencing of seven non-tumor-associated human dura samples and six primary meningioma tumor samples (4 matched and 2 non-matched) was performed. Cell type identities, gene expression profiles, and T cell receptor expression were analyzed. Copy number variant (CNV) analysis was performed to identify putative tumor cells and analyze intratumoral CNV heterogeneity. Immunohistochemistry and imaging mass cytometry was performed on selected samples to validate protein expression and reveal spatial localization of select protein markers. RESULTS In this study, we use single-cell RNA sequencing to perform the first characterization of both non-tumor-associated human dura and primary meningioma samples. First, we reveal a complex immune microenvironment in human dura that is transcriptionally distinct from that of meningioma. In addition, we characterize a functionally diverse and heterogenous landscape of non-immune cells including endothelial cells and fibroblasts. Through imaging mass cytometry, we highlight the spatial relationship among immune cell types and vasculature in non-tumor-associated dura. Utilizing T cell receptor sequencing, we show significant TCR overlap between matched dura and meningioma samples. Finally, we report copy number variant heterogeneity within our meningioma samples. CONCLUSIONS Our comprehensive investigation of both the immune and non-immune cellular landscapes of human dura and meningioma at single-cell resolution builds upon previously published data in murine models and provides new insight into previously uncharacterized roles of human dura.
Collapse
Affiliation(s)
- Anthony Z Wang
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO, USA
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA
- Andrew M. and Jane M. Bursky Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO, USA
- Brain Tumor Center, Washington University School of Medicine/Siteman Cancer Center, St. Louis, USA
- Department of Neurosurgery, Massachusetts General Hospital, Boston, MA, USA
| | - Jay A Bowman-Kirigin
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO, USA
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA
- Andrew M. and Jane M. Bursky Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO, USA
- Brain Tumor Center, Washington University School of Medicine/Siteman Cancer Center, St. Louis, USA
| | - Rupen Desai
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO, USA
- Brain Tumor Center, Washington University School of Medicine/Siteman Cancer Center, St. Louis, USA
| | - Liang-I Kang
- Division of Anatomic and Molecular Pathology, Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA
| | - Pujan R Patel
- Washington University School of Medicine, St. Louis, MO, USA
| | - Bhuvic Patel
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO, USA
- Brain Tumor Center, Washington University School of Medicine/Siteman Cancer Center, St. Louis, USA
| | - Saad M Khan
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO, USA
- Brain Tumor Center, Washington University School of Medicine/Siteman Cancer Center, St. Louis, USA
| | - Diane Bender
- Andrew M. and Jane M. Bursky Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO, USA
| | - M Caleb Marlin
- Arthritis & Clinical Immunology Human Phenotyping Core, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Jingxian Liu
- Department of Genetics, Washington University School of Medicine, St. Louis, MO, USA
- McDonnell Genome Institute, Washington University School of Medicine, St. Louis, MO, USA
| | - Joshua W Osbun
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO, USA
- Brain Tumor Center, Washington University School of Medicine/Siteman Cancer Center, St. Louis, USA
| | - Eric C Leuthardt
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO, USA
- Brain Tumor Center, Washington University School of Medicine/Siteman Cancer Center, St. Louis, USA
| | - Michael R Chicoine
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO, USA
- Brain Tumor Center, Washington University School of Medicine/Siteman Cancer Center, St. Louis, USA
| | - Ralph G Dacey
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO, USA
- Brain Tumor Center, Washington University School of Medicine/Siteman Cancer Center, St. Louis, USA
| | - Gregory J Zipfel
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO, USA
- Brain Tumor Center, Washington University School of Medicine/Siteman Cancer Center, St. Louis, USA
| | - Albert H Kim
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO, USA
- Brain Tumor Center, Washington University School of Medicine/Siteman Cancer Center, St. Louis, USA
| | - David G DeNardo
- Division of Oncology-Molecular Oncology, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Allegra A Petti
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO, USA.
- Brain Tumor Center, Washington University School of Medicine/Siteman Cancer Center, St. Louis, USA.
- Department of Genetics, Washington University School of Medicine, St. Louis, MO, USA.
- Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA.
| | - Gavin P Dunn
- Department of Neurosurgery, Massachusetts General Hospital, Boston, MA, USA.
| |
Collapse
|
5
|
Donahue ND, Kanapilly S, Stephan C, Marlin MC, Francek ER, Haddad M, Guthridge J, Wilhelm S. Quantifying Chemical Composition and Reaction Kinetics of Individual Colloidally Dispersed Nanoparticles. Nano Lett 2022; 22:294-301. [PMID: 34962815 DOI: 10.1021/acs.nanolett.1c03752] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
To control a nanoparticle's chemical composition and thus function, researchers require readily accessible and economical characterization methods that provide quantitative in situ analysis of individual nanoparticles with high throughput. Here, we established dual analyte single-particle inductively coupled plasma quadrupole mass spectrometry to quantify the chemical composition and reaction kinetics of individual colloidal nanoparticles. We determined the individual bimetallic nanoparticle mass and chemical composition changes during two different chemical reactions: (i) nanoparticle etching and (ii) element deposition on nanoparticles at a rate of 300+ nanoparticles/min. Our results revealed the heterogeneity of chemical reactions at the single nanoparticle level. This proof-of-concept study serves as a framework to quantitatively understand the dynamic changes of physicochemical properties that individual nanoparticles undergo during chemical reactions using a commonly available mass spectrometer. Such methods will broadly empower and inform the synthesis and development of safer, more effective, and more efficient nanotechnologies that use nanoparticles with defined functions.
Collapse
Affiliation(s)
- Nathan D Donahue
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, Oklahoma 73019, United States
| | | | | | - M Caleb Marlin
- Arthritis and Clinical Immunology, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma 73104, United States
| | - Emmy R Francek
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Majood Haddad
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Joel Guthridge
- Arthritis and Clinical Immunology, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma 73104, United States
- Department of Pathology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, United States
| | - Stefan Wilhelm
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, Oklahoma 73019, United States
- Institute for Biomedical Engineering, Science, and Technology (IBEST), Norman, Oklahoma 73019, United States
- Stephenson Cancer Center, Oklahoma City, Oklahoma 73104, United States
| |
Collapse
|
6
|
Joachims ML, Leehan KM, Dozmorov MG, Georgescu C, Pan Z, Lawrence C, Marlin MC, Macwana S, Rasmussen A, Radfar L, Lewis DM, Stone DU, Grundahl K, Scofield RH, Lessard CJ, Wren JD, Thompson LF, Guthridge JM, Sivils KL, Moore JS, Farris AD. Sjögren's Syndrome Minor Salivary Gland CD4 + Memory T Cells Associate with Glandular Disease Features and have a Germinal Center T Follicular Helper Transcriptional Profile. J Clin Med 2020; 9:jcm9072164. [PMID: 32650575 PMCID: PMC7408878 DOI: 10.3390/jcm9072164] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 06/25/2020] [Accepted: 07/06/2020] [Indexed: 12/13/2022] Open
Abstract
To assess the types of salivary gland (SG) T cells contributing to Sjögren's syndrome (SS), we evaluated SG T cell subtypes for association with disease features and compared the SG CD4+ memory T cell transcriptomes of subjects with either primary SS (pSS) or non-SS sicca (nSS). SG biopsies were evaluated for proportions and absolute numbers of CD4+ and CD8+ T cells. SG memory CD4+ T cells were evaluated for gene expression by microarray. Differentially-expressed genes were identified, and gene set enrichment and pathways analyses were performed. CD4+CD45RA- T cells were increased in pSS compared to nSS subjects (33.2% vs. 22.2%, p < 0.0001), while CD8+CD45RA- T cells were decreased (38.5% vs. 46.0%, p = 0.0014). SG fibrosis positively correlated with numbers of memory T cells. Proportions of SG CD4+CD45RA- T cells correlated with focus score (r = 0.43, p < 0.0001), corneal damage (r = 0.43, p < 0.0001), and serum Ro antibodies (r = 0.40, p < 0.0001). Differentially-expressed genes in CD4+CD45RA- cells indicated a T follicular helper (Tfh) profile, increased homing and increased cellular interactions. Predicted upstream drivers of the Tfh signature included TCR, TNF, TGF-β1, IL-4, and IL-21. In conclusion, the proportions and numbers of SG memory CD4+ T cells associate with key SS features, consistent with a central role in disease pathogenesis.
Collapse
Affiliation(s)
- Michelle L. Joachims
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Oklahoma City, OK 73104, USA; (M.L.J.); (K.M.L.); (M.G.D.); (C.G.); (Z.P.); (C.L.); (M.C.M.); (S.M.); (A.R.); (K.G.); (R.H.S.); (C.J.L.); (J.D.W.); (L.F.T.); (J.M.G.); (K.L.S.); (J.S.M.)
| | - Kerry M. Leehan
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Oklahoma City, OK 73104, USA; (M.L.J.); (K.M.L.); (M.G.D.); (C.G.); (Z.P.); (C.L.); (M.C.M.); (S.M.); (A.R.); (K.G.); (R.H.S.); (C.J.L.); (J.D.W.); (L.F.T.); (J.M.G.); (K.L.S.); (J.S.M.)
| | - Mikhail G. Dozmorov
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Oklahoma City, OK 73104, USA; (M.L.J.); (K.M.L.); (M.G.D.); (C.G.); (Z.P.); (C.L.); (M.C.M.); (S.M.); (A.R.); (K.G.); (R.H.S.); (C.J.L.); (J.D.W.); (L.F.T.); (J.M.G.); (K.L.S.); (J.S.M.)
| | - Constantin Georgescu
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Oklahoma City, OK 73104, USA; (M.L.J.); (K.M.L.); (M.G.D.); (C.G.); (Z.P.); (C.L.); (M.C.M.); (S.M.); (A.R.); (K.G.); (R.H.S.); (C.J.L.); (J.D.W.); (L.F.T.); (J.M.G.); (K.L.S.); (J.S.M.)
| | - Zijian Pan
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Oklahoma City, OK 73104, USA; (M.L.J.); (K.M.L.); (M.G.D.); (C.G.); (Z.P.); (C.L.); (M.C.M.); (S.M.); (A.R.); (K.G.); (R.H.S.); (C.J.L.); (J.D.W.); (L.F.T.); (J.M.G.); (K.L.S.); (J.S.M.)
| | - Christina Lawrence
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Oklahoma City, OK 73104, USA; (M.L.J.); (K.M.L.); (M.G.D.); (C.G.); (Z.P.); (C.L.); (M.C.M.); (S.M.); (A.R.); (K.G.); (R.H.S.); (C.J.L.); (J.D.W.); (L.F.T.); (J.M.G.); (K.L.S.); (J.S.M.)
| | - M. Caleb Marlin
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Oklahoma City, OK 73104, USA; (M.L.J.); (K.M.L.); (M.G.D.); (C.G.); (Z.P.); (C.L.); (M.C.M.); (S.M.); (A.R.); (K.G.); (R.H.S.); (C.J.L.); (J.D.W.); (L.F.T.); (J.M.G.); (K.L.S.); (J.S.M.)
| | - Susan Macwana
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Oklahoma City, OK 73104, USA; (M.L.J.); (K.M.L.); (M.G.D.); (C.G.); (Z.P.); (C.L.); (M.C.M.); (S.M.); (A.R.); (K.G.); (R.H.S.); (C.J.L.); (J.D.W.); (L.F.T.); (J.M.G.); (K.L.S.); (J.S.M.)
| | - Astrid Rasmussen
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Oklahoma City, OK 73104, USA; (M.L.J.); (K.M.L.); (M.G.D.); (C.G.); (Z.P.); (C.L.); (M.C.M.); (S.M.); (A.R.); (K.G.); (R.H.S.); (C.J.L.); (J.D.W.); (L.F.T.); (J.M.G.); (K.L.S.); (J.S.M.)
| | - Lida Radfar
- College of Dentistry, University of Oklahoma Health Sciences Center, 1201 N Stonewall Avenue, Oklahoma City, OK 73117, USA; (L.R.); (D.M.L.)
| | - David M. Lewis
- College of Dentistry, University of Oklahoma Health Sciences Center, 1201 N Stonewall Avenue, Oklahoma City, OK 73117, USA; (L.R.); (D.M.L.)
| | - Donald U. Stone
- Dean McGee Eye Institute, University of Oklahoma Health Sciences Center, 608 Stanton L. Young Boulevard, Oklahoma City, OK 73104, USA;
| | - Kiely Grundahl
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Oklahoma City, OK 73104, USA; (M.L.J.); (K.M.L.); (M.G.D.); (C.G.); (Z.P.); (C.L.); (M.C.M.); (S.M.); (A.R.); (K.G.); (R.H.S.); (C.J.L.); (J.D.W.); (L.F.T.); (J.M.G.); (K.L.S.); (J.S.M.)
| | - R. Hal Scofield
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Oklahoma City, OK 73104, USA; (M.L.J.); (K.M.L.); (M.G.D.); (C.G.); (Z.P.); (C.L.); (M.C.M.); (S.M.); (A.R.); (K.G.); (R.H.S.); (C.J.L.); (J.D.W.); (L.F.T.); (J.M.G.); (K.L.S.); (J.S.M.)
- Department of Medicine, University of Oklahoma Health Sciences Center, 1100 N Lindsay Avenue, Oklahoma City, OK 73104, USA
- Department of Veteran’s Affairs Medical Center, 931 NE 13th Street, Oklahoma City, OK 73104, USA
| | - Christopher J. Lessard
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Oklahoma City, OK 73104, USA; (M.L.J.); (K.M.L.); (M.G.D.); (C.G.); (Z.P.); (C.L.); (M.C.M.); (S.M.); (A.R.); (K.G.); (R.H.S.); (C.J.L.); (J.D.W.); (L.F.T.); (J.M.G.); (K.L.S.); (J.S.M.)
| | - Jonathan D. Wren
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Oklahoma City, OK 73104, USA; (M.L.J.); (K.M.L.); (M.G.D.); (C.G.); (Z.P.); (C.L.); (M.C.M.); (S.M.); (A.R.); (K.G.); (R.H.S.); (C.J.L.); (J.D.W.); (L.F.T.); (J.M.G.); (K.L.S.); (J.S.M.)
| | - Linda F. Thompson
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Oklahoma City, OK 73104, USA; (M.L.J.); (K.M.L.); (M.G.D.); (C.G.); (Z.P.); (C.L.); (M.C.M.); (S.M.); (A.R.); (K.G.); (R.H.S.); (C.J.L.); (J.D.W.); (L.F.T.); (J.M.G.); (K.L.S.); (J.S.M.)
| | - Joel M. Guthridge
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Oklahoma City, OK 73104, USA; (M.L.J.); (K.M.L.); (M.G.D.); (C.G.); (Z.P.); (C.L.); (M.C.M.); (S.M.); (A.R.); (K.G.); (R.H.S.); (C.J.L.); (J.D.W.); (L.F.T.); (J.M.G.); (K.L.S.); (J.S.M.)
| | - Kathy L. Sivils
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Oklahoma City, OK 73104, USA; (M.L.J.); (K.M.L.); (M.G.D.); (C.G.); (Z.P.); (C.L.); (M.C.M.); (S.M.); (A.R.); (K.G.); (R.H.S.); (C.J.L.); (J.D.W.); (L.F.T.); (J.M.G.); (K.L.S.); (J.S.M.)
| | - Jacen S. Moore
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Oklahoma City, OK 73104, USA; (M.L.J.); (K.M.L.); (M.G.D.); (C.G.); (Z.P.); (C.L.); (M.C.M.); (S.M.); (A.R.); (K.G.); (R.H.S.); (C.J.L.); (J.D.W.); (L.F.T.); (J.M.G.); (K.L.S.); (J.S.M.)
| | - A. Darise Farris
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Oklahoma City, OK 73104, USA; (M.L.J.); (K.M.L.); (M.G.D.); (C.G.); (Z.P.); (C.L.); (M.C.M.); (S.M.); (A.R.); (K.G.); (R.H.S.); (C.J.L.); (J.D.W.); (L.F.T.); (J.M.G.); (K.L.S.); (J.S.M.)
- Correspondence: ; Tel.: +1-405-271-7389
| |
Collapse
|
7
|
Logan S, Pharaoh GA, Marlin MC, Masser DR, Matsuzaki S, Wronowski B, Yeganeh A, Parks EE, Premkumar P, Farley JA, Owen DB, Humphries KM, Kinter M, Freeman WM, Szweda LI, Van Remmen H, Sonntag WE. Insulin-like growth factor receptor signaling regulates working memory, mitochondrial metabolism, and amyloid-β uptake in astrocytes. Mol Metab 2018; 9:141-155. [PMID: 29398615 PMCID: PMC5870102 DOI: 10.1016/j.molmet.2018.01.013] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 01/11/2018] [Accepted: 01/16/2018] [Indexed: 01/01/2023] Open
Abstract
Objective A decline in mitochondrial function and biogenesis as well as increased reactive oxygen species (ROS) are important determinants of aging. With advancing age, there is a concomitant reduction in circulating levels of insulin-like growth factor-1 (IGF-1) that is closely associated with neuronal aging and neurodegeneration. In this study, we investigated the effect of the decline in IGF-1 signaling with age on astrocyte mitochondrial metabolism and astrocyte function and its association with learning and memory. Methods Learning and memory was assessed using the radial arm water maze in young and old mice as well as tamoxifen-inducible astrocyte-specific knockout of IGFR (GFAP-CreTAM/igfrf/f). The impact of IGF-1 signaling on mitochondrial function was evaluated using primary astrocyte cultures from igfrf/f mice using AAV-Cre mediated knockdown using Oroboros respirometry and Seahorse assays. Results Our results indicate that a reduction in IGF-1 receptor (IGFR) expression with age is associated with decline in hippocampal-dependent learning and increased gliosis. Astrocyte-specific knockout of IGFR also induced impairments in working memory. Using primary astrocyte cultures, we show that reducing IGF-1 signaling via a 30–50% reduction IGFR expression, comparable to the physiological changes in IGF-1 that occur with age, significantly impaired ATP synthesis. IGFR deficient astrocytes also displayed altered mitochondrial structure and function and increased mitochondrial ROS production associated with the induction of an antioxidant response. However, IGFR deficient astrocytes were more sensitive to H2O2-induced cytotoxicity. Moreover, IGFR deficient astrocytes also showed significantly impaired glucose and Aβ uptake, both critical functions of astrocytes in the brain. Conclusions Regulation of astrocytic mitochondrial function and redox status by IGF-1 is essential to maintain astrocytic function and coordinate hippocampal-dependent spatial learning. Age-related astrocytic dysfunction caused by diminished IGF-1 signaling may contribute to the pathogenesis of Alzheimer's disease and other age-associated cognitive pathologies. Altered mitochondrial structure and function with IGFR deficiency in astrocytes is proposed. Increased reactive oxygen species production and susceptibility to peroxide induced cytotoxicity. Decreased Aβ uptake and impairment in spatial working memory.
Collapse
Affiliation(s)
- Sreemathi Logan
- Reynold's Oklahoma Center on Aging, Department of Geriatric Medicine, University of Oklahoma Health Sciences Center, USA.
| | - Gavin A Pharaoh
- Department of Physiology, University of Oklahoma Health Sciences Center, USA; Aging & Metabolism Research Program, Oklahoma Medical Research Foundation, USA
| | - M Caleb Marlin
- Graduate College, University of Oklahoma Health Sciences Center, USA
| | - Dustin R Masser
- Reynold's Oklahoma Center on Aging, Department of Geriatric Medicine, University of Oklahoma Health Sciences Center, USA; Department of Physiology, University of Oklahoma Health Sciences Center, USA
| | - Satoshi Matsuzaki
- Aging & Metabolism Research Program, Oklahoma Medical Research Foundation, USA; Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, USA
| | - Benjamin Wronowski
- Reynold's Oklahoma Center on Aging, Department of Geriatric Medicine, University of Oklahoma Health Sciences Center, USA; Department of Physiology, University of Oklahoma Health Sciences Center, USA
| | - Alexander Yeganeh
- Reynold's Oklahoma Center on Aging, Department of Geriatric Medicine, University of Oklahoma Health Sciences Center, USA; Oklahoma Center for Neuroscience, University of Oklahoma Health Sciences Center, USA
| | - Eileen E Parks
- Reynold's Oklahoma Center on Aging, Department of Geriatric Medicine, University of Oklahoma Health Sciences Center, USA; Oklahoma Center for Neuroscience, University of Oklahoma Health Sciences Center, USA
| | - Pavithra Premkumar
- Aging & Metabolism Research Program, Oklahoma Medical Research Foundation, USA
| | - Julie A Farley
- Reynold's Oklahoma Center on Aging, Department of Geriatric Medicine, University of Oklahoma Health Sciences Center, USA
| | - Daniel B Owen
- Reynold's Oklahoma Center on Aging, Department of Geriatric Medicine, University of Oklahoma Health Sciences Center, USA
| | - Kenneth M Humphries
- Aging & Metabolism Research Program, Oklahoma Medical Research Foundation, USA; Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, USA
| | - Michael Kinter
- Aging & Metabolism Research Program, Oklahoma Medical Research Foundation, USA
| | - Willard M Freeman
- Reynold's Oklahoma Center on Aging, Department of Geriatric Medicine, University of Oklahoma Health Sciences Center, USA; Department of Physiology, University of Oklahoma Health Sciences Center, USA; Oklahoma Center for Neuroscience, University of Oklahoma Health Sciences Center, USA
| | - Luke I Szweda
- Aging & Metabolism Research Program, Oklahoma Medical Research Foundation, USA; Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, USA
| | - Holly Van Remmen
- Department of Physiology, University of Oklahoma Health Sciences Center, USA; Aging & Metabolism Research Program, Oklahoma Medical Research Foundation, USA; Oklahoma Center for Neuroscience, University of Oklahoma Health Sciences Center, USA
| | - William E Sonntag
- Reynold's Oklahoma Center on Aging, Department of Geriatric Medicine, University of Oklahoma Health Sciences Center, USA; Department of Physiology, University of Oklahoma Health Sciences Center, USA; Oklahoma Center for Neuroscience, University of Oklahoma Health Sciences Center, USA
| |
Collapse
|
8
|
Zhang D, Marlin MC, Liang Z, Ahmad M, Ashpole NM, Sonntag WE, Zhao ZJ, Li G. The Protein Tyrosine Phosphatase MEG2 Regulates the Transport and Signal Transduction of Tropomyosin Receptor Kinase A. J Biol Chem 2016; 291:23895-23905. [PMID: 27655914 DOI: 10.1074/jbc.m116.728550] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 09/12/2016] [Indexed: 11/06/2022] Open
Abstract
Protein tyrosine phosphatase MEG2 (PTP-MEG2) is a unique nonreceptor tyrosine phosphatase associated with transport vesicles, where it facilitates membrane trafficking by dephosphorylation of the N-ethylmaleimide-sensitive fusion factor. In this study, we identify the neurotrophin receptor TrkA as a novel cargo whose transport to the cell surface requires PTP-MEG2 activity. In addition, TrkA is also a novel substrate of PTP-MEG2, which dephosphorylates both Tyr-490 and Tyr-674/Tyr-675 of TrkA. As a result, overexpression of PTP-MEG2 down-regulates NGF/TrkA signaling and blocks neurite outgrowth and differentiation in PC12 cells and cortical neurons.
Collapse
Affiliation(s)
- Dongmei Zhang
- From the Key Laboratory of Biopesticide and Chemical Biology, College of Plant Protection, Fujian Agriculture and Forestry University, 350002 Fuzhou, China.,the Departments of Biochemistry and Molecular Biology
| | | | - Zhimin Liang
- the Departments of Biochemistry and Molecular Biology
| | | | | | | | - Zhizhuang Joe Zhao
- Pathology.,Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104
| | - Guangpu Li
- the Departments of Biochemistry and Molecular Biology, .,Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104
| |
Collapse
|
9
|
Abstract
Macroautophagy selectively recycles damaged or unneeded proteins and organelles by degradation via targeting to the autophagosome. The following method seeks to identify candidate Rab GTPases that likely modulate autophagy in PC12 cells during nerve growth factor (NGF) starvation. This microscopy-based assay is a single cell-based quantification of the presence of autophagosomes by fluorescently labeled markers in response to the overexpression of Rabs and mutants in the presence or absence of NGF.
Collapse
Affiliation(s)
- M Caleb Marlin
- Department of Biochemistry and Molecular Biology, Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, 975 NE 10th Street, BRC 419, Oklahoma City, OK, 73104, USA
| | | |
Collapse
|
10
|
Abstract
Rab proteins represent the largest branch of the Ras-like small GTPase superfamily and there are 66 Rab genes in the human genome. They alternate between GTP- and GDP-bound states, which are facilitated by guanine nucleotide exchange factors (GEFs) and GTPase-activating proteins (GAPs), and function as molecular switches in regulation of intracellular membrane trafficking in all eukaryotic cells. Each Rab targets to an organelle and specify a transport step along exocytic, endocytic, and recycling pathways as well as the crosstalk between these pathways. Through interactions with multiple effectors temporally, a Rab can control membrane budding and formation of transport vesicles, vesicle movement along cytoskeleton, and membrane fusion at the target compartment. The large number of Rab proteins reflects the complexity of the intracellular transport system, which is essential for the localization and function of membrane and secretory proteins such as hormones, growth factors, and their membrane receptors. As such, Rab proteins have emerged as important regulators for signal transduction, cell growth, and differentiation. Altered Rab expression and/or activity have been implicated in diseases ranging from neurological disorders, diabetes to cancer.
Collapse
Affiliation(s)
- Guangpu Li
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, 975 NE 10 Street, BRC 417, Oklahoma City, OK, 73104, USA,
| | | |
Collapse
|
11
|
Abstract
Target-derived neurotrophin nerve growth factor (NGF) and its receptor TrkA are well known for retrograde signaling to promote survival and innervation of sympathetic and sensory neurons. In recent years, the signaling endosome model has been used to describe the sustained NGF/TrkA retrograde signaling as a process of endocytosis and retrograde transport of NGF/TrkA-containing endosomes from the axon terminal to the cell body for activation of NGF-inducible gene expression responsible for neuronal survival and development. Here, we review the biogenesis and function of NGF, TrkA, and the signaling endosome and discuss possible roles of Rab GTPases in the biogenesis and trafficking of signaling endosomes.
Collapse
Affiliation(s)
- M Caleb Marlin
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Guangpu Li
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| |
Collapse
|
12
|
Qi Y, Marlin MC, Liang Z, Berry WL, Janknecht R, Zhou J, Wang Z, Lu G, Li G. Distinct biochemical and functional properties of two Rab5 homologs from the rice blast fungus Magnaporthe oryzae. J Biol Chem 2014; 289:28299-309. [PMID: 25164815 DOI: 10.1074/jbc.m114.591503] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Rab5 is a key regulator of early endocytosis by promoting early endosomal fusion and motility. In this study, we have unexpectedly found distinct properties of the two Rab5 homologs (MoRab5A and MoRab5B) from Magnaporthe oryzae, a pathogenic fungus in plants whose infection causes rice blast disease. Like mammalian Rab5, MoRab5A and MoRab5B can bind to several Rab5 effectors in a GTP-dependent manner, including EEA1, Rabenosyn-5, and Rabaptin-5. However, MoRab5A shows distinct binding characteristics in the sense that both the wild-type and the GTP hydrolysis-defective constitutively active mutant bind the effectors equally well in GST pull-down assays, suggesting that MoRab5A is defective in GTP hydrolysis and mostly in the GTP-bound conformation in the cell. Indeed, GTP hydrolysis assays indicate that MoRab5A GTPase activity is dramatically lower than MoRab5B and human Rab5 and is insensitive to RabGAP5 stimulation. We have further identified a Pro residue in the switch I region largely responsible for the distinct MoRab5A properties by characterization of MoRab5A and MoRab5B chimeras and mutagenesis. The differences between MoRab5A and MoRab5B extend to their functions in the cell. Although they both target to early endosomes, only MoRab5B closely resembles human Rab5 in promoting early endosome fusion and stimulating fluid phase endocytosis. In contrast, MoRab5A correlates with another related early endosomal Rab, Rab22, in terms of the presence of the switch I Pro residue and the blocked GTPase activity. Our data thus identify MoRab5B as the Rab5 ortholog and suggest that MoRab5A specializes to perform a non-redundant function in endosomal sorting.
Collapse
Affiliation(s)
- Yaoyao Qi
- From the Key Laboratory of Biopesticides and Chemical Biology, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China, and Departments of Biochemistry and Molecular Biology
| | | | - Zhimin Liang
- Departments of Biochemistry and Molecular Biology
| | | | - Ralf Janknecht
- Cell Biology, and Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104
| | - Jie Zhou
- From the Key Laboratory of Biopesticides and Chemical Biology, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China, and
| | - Zonghua Wang
- From the Key Laboratory of Biopesticides and Chemical Biology, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China, and
| | - Guodong Lu
- From the Key Laboratory of Biopesticides and Chemical Biology, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China, and
| | - Guangpu Li
- Departments of Biochemistry and Molecular Biology, Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104
| |
Collapse
|