1
|
Gammon ST, Cohen AS, Lehnert AL, Sullivan DC, Malyarenko D, Manning HC, Hormuth DA, Daldrup-Link HE, An H, Quirk JD, Shoghi K, Pagel MD, Kinahan PE, Miyaoka RS, Houghton AM, Lewis MT, Larson P, Sriram R, Blocker SJ, Pickup S, Badea A, Badea CT, Yankeelov TE, Chenevert TL. An Online Repository for Pre-Clinical Imaging Protocols (PIPs). Tomography 2023; 9:750-758. [PMID: 37104131 PMCID: PMC10145184 DOI: 10.3390/tomography9020060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 03/15/2023] [Accepted: 03/16/2023] [Indexed: 03/29/2023] Open
Abstract
Providing method descriptions that are more detailed than currently available in typical peer reviewed journals has been identified as an actionable area for improvement. In the biochemical and cell biology space, this need has been met through the creation of new journals focused on detailed protocols and materials sourcing. However, this format is not well suited for capturing instrument validation, detailed imaging protocols, and extensive statistical analysis. Furthermore, the need for additional information must be counterbalanced by the additional time burden placed upon researchers who may be already overtasked. To address these competing issues, this white paper describes protocol templates for positron emission tomography (PET), X-ray computed tomography (CT), and magnetic resonance imaging (MRI) that can be leveraged by the broad community of quantitative imaging experts to write and self-publish protocols in protocols.io. Similar to the Structured Transparent Accessible Reproducible (STAR) or Journal of Visualized Experiments (JoVE) articles, authors are encouraged to publish peer reviewed papers and then to submit more detailed experimental protocols using this template to the online resource. Such protocols should be easy to use, readily accessible, readily searchable, considered open access, enable community feedback, editable, and citable by the author.
Collapse
Affiliation(s)
- Seth T. Gammon
- Department of Cancer Systems Imaging, University of MD Anderson Cancer Center, 1881 E. Road, Houston, TX 77030, USA
- Correspondence: ; Tel.: +713-745-3705
| | - Allison S. Cohen
- Department of Cancer Systems Imaging, University of MD Anderson Cancer Center, 1881 E. Road, Houston, TX 77030, USA
| | | | - Daniel C. Sullivan
- Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA 94158, USA
| | - Dariya Malyarenko
- Department of Radiology, University of Michigan, Ann Arbor, MI 48108, USA
| | - Henry Charles Manning
- Department of Cancer Systems Imaging, University of MD Anderson Cancer Center, 1881 E. Road, Houston, TX 77030, USA
| | - David A. Hormuth
- Oden Institute for Computational Engineering and Sciences, and Livestrong Cancer Institutes, Dell Medical School, The University of Texas at Austin, Austin, TX 78712, USA
| | - Heike E. Daldrup-Link
- Department of Radiology, Molecular Imaging Program at Stanford, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Hongyu An
- Mallinckrodt Institute of Radiology, Washington University, St. Louis, MO 63110, USA
| | - James D. Quirk
- Mallinckrodt Institute of Radiology, Washington University, St. Louis, MO 63110, USA
| | - Kooresh Shoghi
- Mallinckrodt Institute of Radiology, Washington University, St. Louis, MO 63110, USA
| | - Mark David Pagel
- Department of Cancer Systems Imaging, University of MD Anderson Cancer Center, 1881 E. Road, Houston, TX 77030, USA
| | - Paul E. Kinahan
- Department of Radiology, University of Washington, Seattle, WA 98105, USA
| | - Robert S. Miyaoka
- Department of Radiology, University of Washington, Seattle, WA 98105, USA
| | | | - Michael T. Lewis
- Lester and Sue Smith Breast Center, Dan L Duncan Comprehensive Cancer Center, Houston, TX 77030, USA
| | - Peder Larson
- Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA 94158, USA
| | - Renuka Sriram
- Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA 94158, USA
| | - Stephanie J. Blocker
- Center for In Vivo Microscopy, Department of Radiology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Stephen Pickup
- Department of Radiology, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Alexandra Badea
- Department of Radiology, Duke University, Durham, NC 27708, USA
| | | | - Thomas E. Yankeelov
- Department of Biomedical Engineering, Diagnostic Medicine, and Oncology, Oden Institute for Computational Engineering and Sciences, Livestrong Cancer Institutes, The University of Texas at Austin, Austin, TX 78712, USA
- Department of Imaging Physics, MD Anderson Cancer Center, Houston, TX 77030, USA
| | | |
Collapse
|
2
|
Bae SW, Wang J, Georgiou DK, Wen X, Cohen AS, Geng L, Tantawy MN, Manning HC. Feasibility of [ 18F]FSPG PET for Early Response Assessment to Combined Blockade of EGFR and Glutamine Metabolism in Wild-Type KRAS Colorectal Cancer. Tomography 2023; 9:497-508. [PMID: 36961000 PMCID: PMC10037609 DOI: 10.3390/tomography9020041] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/17/2023] [Accepted: 02/22/2023] [Indexed: 02/26/2023] Open
Abstract
Early response assessment is critical for personalizing cancer therapy. Emerging therapeutic regimens with encouraging results in the wild-type (WT) KRAS colorectal cancer (CRC) setting include inhibitors of epidermal growth factor receptor (EGFR) and glutaminolysis. Towards predicting clinical outcome, this preclinical study evaluated non-invasive positron emission tomography (PET) with (4S)-4-(3-[18F]fluoropropyl)-L-glutamic acid ([18F]FSPG) in treatment-sensitive and treatment-resistant WT KRAS CRC patient-derived xenografts (PDXs). Tumor-bearing mice were imaged with [18F]FSPG PET before and one week following the initiation of treatment with either EGFR-targeted monoclonal antibody (mAb) therapy, glutaminase inhibitor therapy, or the combination. Imaging was correlated with tumor volume and histology. In PDX that responded to therapy, [18F]FSPG PET was significantly decreased from baseline at 1-week post-therapy, prior to changes in tumor volume. In contrast, [18F]FSPG PET was not decreased in non-responding PDX. These data suggest that [18F]FSPG PET may serve as an early metric of response to EGFR and glutaminase inhibition in the WT KRAS CRC setting.
Collapse
Affiliation(s)
- Seong-Woo Bae
- Department of Cancer Systems Imaging, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030, USA
| | - Jianbo Wang
- Department of Cancer Systems Imaging, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030, USA
| | - Dimitra K. Georgiou
- Department of Cancer Systems Imaging, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030, USA
| | - Xiaoxia Wen
- Department of Cancer Systems Imaging, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030, USA
| | - Allison S. Cohen
- Department of Cancer Systems Imaging, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030, USA
| | - Ling Geng
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, 1161 21st Avenue South, Medical Center North, AA-1105, Nashville, TN 37232, USA
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, 1161 21st Avenue South, Medical Center North, AA-1105, Nashville, TN 37232, USA
| | - Mohammed Noor Tantawy
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, 1161 21st Avenue South, Medical Center North, AA-1105, Nashville, TN 37232, USA
- Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, 1161 21st Avenue South, Medical Center North, Nashville, TN 37232, USA
| | - H. Charles Manning
- Department of Cancer Systems Imaging, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030, USA
| |
Collapse
|
3
|
Lin M, Coll RP, Cohen AS, Georgiou DK, Manning HC. PET Oncological Radiopharmaceuticals: Current Status and Perspectives. Molecules 2022; 27:6790. [PMID: 36296381 PMCID: PMC9609795 DOI: 10.3390/molecules27206790] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 09/06/2022] [Revised: 10/03/2022] [Accepted: 10/07/2022] [Indexed: 02/01/2024] Open
Abstract
Molecular imaging is the visual representation of biological processes that take place at the cellular or molecular level in living organisms. To date, molecular imaging plays an important role in the transition from conventional medical practice to precision medicine. Among all imaging modalities, positron emission tomography (PET) has great advantages in sensitivity and the ability to obtain absolute imaging quantification after corrections for photon attenuation and scattering. Due to the ability to label a host of unique molecules of biological interest, including endogenous, naturally occurring substrates and drug-like compounds, the role of PET has been well established in the field of molecular imaging. In this article, we provide an overview of the recent advances in the development of PET radiopharmaceuticals and their clinical applications in oncology.
Collapse
Affiliation(s)
- Mai Lin
- Cyclotron Radiochemistry Facility, The University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA
| | - Ryan P. Coll
- Department of Cancer Systems Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Allison S. Cohen
- Department of Cancer Systems Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Dimitra K. Georgiou
- Department of Cancer Systems Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Henry Charles Manning
- Cyclotron Radiochemistry Facility, The University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA
- Department of Cancer Systems Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| |
Collapse
|
4
|
Cohen AS, Grudzinski J, Smith GT, Peterson TE, Whisenant JG, Hickman TL, Ciombor KK, Cardin D, Eng C, Goff LW, Das S, Coffey RJ, Berlin JD, Manning HC. First-in-Human PET Imaging and Estimated Radiation Dosimetry of l-[5- 11C]-Glutamine in Patients with Metastatic Colorectal Cancer. J Nucl Med 2021; 63:36-43. [PMID: 33931465 PMCID: PMC8717201 DOI: 10.2967/jnumed.120.261594] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 12/23/2020] [Revised: 03/26/2021] [Indexed: 12/23/2022] Open
Abstract
Altered metabolism is a hallmark of cancer. In addition to glucose, glutamine is an important nutrient for cellular growth and proliferation. Noninvasive imaging via PET may help facilitate precision treatment of cancer through patient selection and monitoring of treatment response. l-[5-11C]-glutamine (11C-glutamine) is a PET tracer designed to study glutamine uptake and metabolism. The aim of this first-in-human study was to evaluate the radiologic safety and biodistribution of 11C-glutamine for oncologic PET imaging. Methods: Nine patients with confirmed metastatic colorectal cancer underwent PET/CT imaging. Patients received 337.97 ± 44.08 MBq of 11C-glutamine. Dynamic PET acquisitions that were centered over the abdomen or thorax were initiated simultaneously with intravenous tracer administration. After the dynamic acquisition, a whole-body PET/CT scan was acquired. Volume-of-interest analyses were performed to obtain estimates of organ-based absorbed doses of radiation. Results: 11C-glutamine was well tolerated in all patients, with no observed safety concerns. The organs with the highest radiation exposure included the bladder, pancreas, and liver. The estimated effective dose was 4.46E-03 ± 7.67E-04 mSv/MBq. Accumulation of 11C-glutamine was elevated and visualized in lung, brain, bone, and liver metastases, suggesting utility for cancer imaging. Conclusion: PET using 11C-glutamine appears safe for human use and allows noninvasive visualization of metastatic colon cancer lesions in multiple organs. Further studies are needed to elucidate its potential for other cancers and for monitoring response to treatment.
Collapse
Affiliation(s)
- Allison S Cohen
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee
| | | | - Gary T Smith
- Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee.,Section Chief, Nuclear Medicine, Tennessee Valley Healthcare System, Nashville VA Medical Center, Nashville, Tennessee
| | - Todd E Peterson
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jennifer G Whisenant
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee; and
| | - Tiffany L Hickman
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee; and
| | - Kristen K Ciombor
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee; and
| | - Dana Cardin
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee; and
| | - Cathy Eng
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee; and
| | - Laura W Goff
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee; and
| | - Satya Das
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee; and
| | - Robert J Coffey
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee; and.,Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Jordan D Berlin
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee; and
| | - H Charles Manning
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, Nashville, Tennessee; .,Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee; and
| |
Collapse
|
5
|
Madden MZ, Reinfeld BI, Wolf MM, Chytil A, Cohen AS, Muir A, Hongo RA, Abraham A, Beckermann KE, Manning HC, Rathmell WK, Rathmell JC. Nutrient partitioning in the tumor microenvironment. The Journal of Immunology 2021. [DOI: 10.4049/jimmunol.206.supp.56.06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Abstract
The tumor microenvironment (TME) includes cancer and infiltrating immune cells. Tumors canonically consume glucose through Warburg metabolism, a process forming the basis of cancer imaging by positron emission tomography (PET). Activated immune cells also rely on glucose, and impaired immune cell metabolism in the TME contributes to tumor progression. It remains uncertain, however, if immune cell metabolism is dysregulated in the TME by cell intrinsic programs or by competition with cancer cells for limiting nutrients. Here we used PET tracers to measure access and uptake of glucose and glutamine by specific cell subsets in the TME. Surprisingly, myeloid cells had the greatest capacity to uptake glucose in vivo, followed by T cells and cancer cells across a range of cancer models. Cancer cells, in contrast, demonstrated high glutamine uptake. This distinct nutrient partitioning was cell intrinsically programmed through mTORC1 signaling and glucose and glutamine-related gene expression. Inhibiting glutamine uptake enhanced glucose uptake across tumor resident cell types, suggesting that glutamine metabolism suppresses glucose uptake without glucose being limiting in the TME. Thus, cell intrinsic programs dictate the preferential immune and cancer cell acquisition of glucose and glutamine. Cell selective partitioning of these nutrients may be exploited to develop therapies and imaging strategies to enhance or monitor the metabolism and activities of specific cell populations in the TME.
Collapse
|
6
|
Reinfeld BI, Madden MZ, Wolf MM, Chytil A, Bader JE, Patterson AR, Sugiura A, Cohen AS, Ali A, Do BT, Muir A, Lewis CA, Hongo RA, Young KL, Brown RE, Todd VM, Huffstater T, Abraham A, O'Neil RT, Wilson MH, Xin F, Tantawy MN, Merryman WD, Johnson RW, Williams CS, Mason EF, Mason FM, Beckermann KE, Vander Heiden MG, Manning HC, Rathmell JC, Rathmell WK. Cell-programmed nutrient partitioning in the tumour microenvironment. Nature 2021; 593:282-288. [PMID: 33828302 PMCID: PMC8122068 DOI: 10.1038/s41586-021-03442-1] [Citation(s) in RCA: 445] [Impact Index Per Article: 148.3] [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: 08/09/2020] [Accepted: 03/10/2021] [Indexed: 02/01/2023]
Abstract
Cancer cells characteristically consume glucose through Warburg metabolism1, a process that forms the basis of tumour imaging by positron emission tomography (PET). Tumour-infiltrating immune cells also rely on glucose, and impaired immune cell metabolism in the tumour microenvironment (TME) contributes to immune evasion by tumour cells2-4. However, whether the metabolism of immune cells is dysregulated in the TME by cell-intrinsic programs or by competition with cancer cells for limited nutrients remains unclear. Here we used PET tracers to measure the access to and uptake of glucose and glutamine by specific cell subsets in the TME. Notably, myeloid cells had the greatest capacity to take up intratumoral glucose, followed by T cells and cancer cells, across a range of cancer models. By contrast, cancer cells showed the highest uptake of glutamine. This distinct nutrient partitioning was programmed in a cell-intrinsic manner through mTORC1 signalling and the expression of genes related to the metabolism of glucose and glutamine. Inhibiting glutamine uptake enhanced glucose uptake across tumour-resident cell types, showing that glutamine metabolism suppresses glucose uptake without glucose being a limiting factor in the TME. Thus, cell-intrinsic programs drive the preferential acquisition of glucose and glutamine by immune and cancer cells, respectively. Cell-selective partitioning of these nutrients could be exploited to develop therapies and imaging strategies to enhance or monitor the metabolic programs and activities of specific cell populations in the TME.
Collapse
Affiliation(s)
- Bradley I Reinfeld
- Medical Scientist Training Program, Vanderbilt University, Nashville, TN, USA
- Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, TN, USA
- Graduate Program in Cancer Biology, Vanderbilt University, Nashville, TN, USA
| | - Matthew Z Madden
- Medical Scientist Training Program, Vanderbilt University, Nashville, TN, USA
- Department of Pathology, Microbiology and Immunology, VUMC, Nashville, TN, USA
| | - Melissa M Wolf
- Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, TN, USA
- Graduate Program in Cancer Biology, Vanderbilt University, Nashville, TN, USA
| | - Anna Chytil
- Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, TN, USA
| | - Jackie E Bader
- Department of Pathology, Microbiology and Immunology, VUMC, Nashville, TN, USA
| | - Andrew R Patterson
- Department of Pathology, Microbiology and Immunology, VUMC, Nashville, TN, USA
| | - Ayaka Sugiura
- Medical Scientist Training Program, Vanderbilt University, Nashville, TN, USA
- Department of Pathology, Microbiology and Immunology, VUMC, Nashville, TN, USA
| | - Allison S Cohen
- Department of Radiology and Radiological Sciences, VUMC, Nashville, TN, USA
- Vanderbilt University Institute of Imaging Science, VUMC, Nashville, TN, USA
| | - Ahmed Ali
- Koch Institute for Integrative Cancer Research and Department of Biology, Massachusetts Institute of Technology (MIT), Cambridge, MA, USA
- Broad Institute of MIT and Harvard University, Cambridge, MA, USA
| | - Brian T Do
- Koch Institute for Integrative Cancer Research and Department of Biology, Massachusetts Institute of Technology (MIT), Cambridge, MA, USA
- Broad Institute of MIT and Harvard University, Cambridge, MA, USA
| | - Alexander Muir
- Ben May Department for Cancer Research, University of Chicago, Chicago, IL, USA
| | - Caroline A Lewis
- Whitehead Institute for Biomedical Research, MIT, Cambridge, MA, USA
| | - Rachel A Hongo
- Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, TN, USA
- Department of Pathology, Microbiology and Immunology, VUMC, Nashville, TN, USA
| | - Kirsten L Young
- Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, TN, USA
- Department of Pathology, Microbiology and Immunology, VUMC, Nashville, TN, USA
| | - Rachel E Brown
- Medical Scientist Training Program, Vanderbilt University, Nashville, TN, USA
- Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, TN, USA
- Graduate Program in Cancer Biology, Vanderbilt University, Nashville, TN, USA
| | - Vera M Todd
- Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, TN, USA
- Graduate Program in Cancer Biology, Vanderbilt University, Nashville, TN, USA
| | - Tessa Huffstater
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | - Abin Abraham
- Medical Scientist Training Program, Vanderbilt University, Nashville, TN, USA
- Vanderbilt Genetics Institute, VUMC, Nashville, TN, USA
| | - Richard T O'Neil
- Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, TN, USA
- Department of Veterans Affairs, Tennessee Valley Health System, Nashville, TN, USA
| | - Matthew H Wilson
- Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, TN, USA
- Department of Veterans Affairs, Tennessee Valley Health System, Nashville, TN, USA
| | - Fuxue Xin
- Department of Radiology and Radiological Sciences, VUMC, Nashville, TN, USA
- Vanderbilt University Institute of Imaging Science, VUMC, Nashville, TN, USA
| | - M Noor Tantawy
- Department of Radiology and Radiological Sciences, VUMC, Nashville, TN, USA
- Vanderbilt University Institute of Imaging Science, VUMC, Nashville, TN, USA
| | - W David Merryman
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | - Rachelle W Johnson
- Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, TN, USA
| | - Christopher S Williams
- Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, TN, USA
- Department of Veterans Affairs, Tennessee Valley Health System, Nashville, TN, USA
| | - Emily F Mason
- Department of Pathology, Microbiology and Immunology, VUMC, Nashville, TN, USA
| | - Frank M Mason
- Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, TN, USA
| | | | - Matthew G Vander Heiden
- Koch Institute for Integrative Cancer Research and Department of Biology, Massachusetts Institute of Technology (MIT), Cambridge, MA, USA
- Broad Institute of MIT and Harvard University, Cambridge, MA, USA
- Dana-Farber Cancer Institute, Boston, MA, USA
| | - H Charles Manning
- Department of Radiology and Radiological Sciences, VUMC, Nashville, TN, USA
- Vanderbilt University Institute of Imaging Science, VUMC, Nashville, TN, USA
| | - Jeffrey C Rathmell
- Department of Pathology, Microbiology and Immunology, VUMC, Nashville, TN, USA.
- Vanderbilt Center for Immunobiology and Vanderbilt-Ingram Cancer Center, VUMC, Nashville, TN, USA.
| | - W Kimryn Rathmell
- Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, TN, USA.
- Vanderbilt Center for Immunobiology and Vanderbilt-Ingram Cancer Center, VUMC, Nashville, TN, USA.
| |
Collapse
|
7
|
McGlue MM, Ivory SJ, Stone JR, Cohen AS, Kamulali TM, Latimer JC, Brannon MA, Kimirei IA, Soreghan MJ. Solar irradiance and ENSO affect food security in Lake Tanganyika, a major African inland fishery. Sci Adv 2020; 6:6/41/eabb2191. [PMID: 33036964 PMCID: PMC7546696 DOI: 10.1126/sciadv.abb2191] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 08/20/2020] [Indexed: 06/11/2023]
Abstract
Food security in a warming world is a grave concern for rapidly growing impoverished populations. Low-latitude inland fisheries provide protein for millions of rural poor, yet the impacts of high-frequency climate oscillations on these aquatic ecosystems are unknown. Here, we present a sub-annual-to-annual resolution paleolimnological reconstruction of upwelling, productivity, and algal composition at Lake Tanganyika, one of Africa's largest landlocked fisheries. The data reveal increases in diatom production at centennial-scale solar irradiance maxima, and interannual variability in upwelling linked to La Niña. Our study shows that interactions between global climatic controls and El Niño-Southern Oscillation teleconnections exert profound influences on the foundation of Lake Tanganyika's food web. Adapting long-term management practices to account for high-frequency changes in algal production will help safeguard inland fish resources.
Collapse
Affiliation(s)
- M M McGlue
- Department of Earth and Environmental Sciences, University of Kentucky, Lexington, KY, USA.
| | - S J Ivory
- Department of Geosciences and Earth and Environmental Systems Institute, Pennsylvania State University, University Park, PA, USA
| | - J R Stone
- Department of Earth and Environmental Systems, Indiana State University, Terre Haute, IN, USA
| | - A S Cohen
- Department of Geosciences, University of Arizona, Tucson, AZ, USA
| | - T M Kamulali
- Department of Geosciences, University of Arizona, Tucson, AZ, USA
| | - J C Latimer
- Department of Earth and Environmental Systems, Indiana State University, Terre Haute, IN, USA
| | - M A Brannon
- Department of Earth and Environmental Sciences, University of Kentucky, Lexington, KY, USA
| | - I A Kimirei
- Tanzania Fisheries Research Institute, Dar es Salaam, Tanzania
| | - M J Soreghan
- School of Geosciences, University of Oklahoma, Norman, OK, USA
| |
Collapse
|
8
|
Cohen AS, Geng L, Zhao P, Fu A, Schulte ML, Graves-Deal R, Washington MK, Berlin J, Coffey RJ, Manning HC. Combined blockade of EGFR and glutamine metabolism in preclinical models of colorectal cancer. Transl Oncol 2020; 13:100828. [PMID: 32652471 PMCID: PMC7348062 DOI: 10.1016/j.tranon.2020.100828] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [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: 06/11/2020] [Accepted: 06/12/2020] [Indexed: 12/20/2022] Open
Abstract
Improving response to epidermal growth factor receptor (EGFR)-targeted therapies in patients with advanced wild-type (WT) RAS colorectal cancer (CRC) remains an unmet need. In this preclinical work, we evaluated a new therapeutic combination aimed at enhancing efficacy by targeting cancer cell metabolism in concert with EGFR. We hypothesized that combined blockade of glutamine metabolism and EGFR represents a promising treatment approach by targeting both the "fuel" and "signaling" components that these tumors need to survive. To explore this hypothesis, we combined CB-839, an inhibitor of glutaminase 1 (GLS1), the mitochondrial enzyme responsible for catalyzing conversion of glutamine to glutamate, with cetuximab, an EGFR-targeted monoclonal antibody in preclinical models of CRC. 2D and 3D in vitro assays were executed following treatment with either single agent or combination therapy. The combination of cetuximab with CB-839 resulted in reduced cell viability and demonstrated synergism in several cell lines. In vivo efficacy experiments were performed in cell-line xenograft models propagated in athymic nude mice. Tumor volumes were measured followed by immunohistochemical (IHC) analysis of proliferation (Ki67), mechanistic target of rapamycin (mTOR) signaling (pS6), and multiple mechanisms of cell death to annotate molecular determinants of response. In vivo, a significant reduction in tumor growth and reduced Ki67 and pS6 IHC staining were observed with combination therapy, which was accompanied by increased apoptosis and/or necrosis. The combination showed efficacy in cetuximab-sensitive as well as resistant models. In conclusion, this therapeutic combination represents a promising new precision medicine approach for patients with refractory metastatic WT RAS CRC.
Collapse
Key Words
- cac, citric acid cycle
- crc, colorectal cancer
- egfr, epidermal growth factor receptor
- gln, glutamine
- gls1, glutaminase 1
- glu, glutamate
- h&e, hematoxylin and eosin
- ihc, immunohistochemical
- mab, monoclonal antibody
- mapk, mitogen activated protein kinase
- nsclc, non-small cell lung cancer
- sd, standard deviation
- wt, wild-type
Collapse
Affiliation(s)
- Allison S Cohen
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, 1161 21(st) Avenue South, Medical Center North, R0102, Nashville, TN 37232, United States; Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, 1161 21st Avenue South, Medical Center North, R0102, Nashville, TN 37232, United States
| | - Ling Geng
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, 1161 21(st) Avenue South, Medical Center North, R0102, Nashville, TN 37232, United States; Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, 1161 21st Avenue South, Medical Center North, R0102, Nashville, TN 37232, United States
| | - Ping Zhao
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, 1161 21(st) Avenue South, Medical Center North, R0102, Nashville, TN 37232, United States; Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, 1161 21st Avenue South, Medical Center North, R0102, Nashville, TN 37232, United States
| | - Allie Fu
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, 1161 21(st) Avenue South, Medical Center North, R0102, Nashville, TN 37232, United States; Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, 1161 21st Avenue South, Medical Center North, R0102, Nashville, TN 37232, United States
| | - Michael L Schulte
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, 1161 21(st) Avenue South, Medical Center North, R0102, Nashville, TN 37232, United States; Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, 1161 21st Avenue South, Medical Center North, R0102, Nashville, TN 37232, United States; Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, 1161 21st Avenue South, Medical Center North, Nashville, TN 37232, United States
| | - Ramona Graves-Deal
- Department of Medicine, Vanderbilt University Medical Center, 1161 21st Avenue South, Medical Center North, Nashville, TN 37232, United States; Department of Cell and Developmental Biology, Vanderbilt University, 465 21st Avenue South, U3218 MRB III, Nashville, TN 37232, United States
| | - M Kay Washington
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, 1161 21st Avenue South, Medical Center North, C-3322, Nashville, TN 37232, United States; Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, 2220 Pierce Avenue, Nashville, TN 37232, United States
| | - Jordan Berlin
- Department of Medicine, Vanderbilt University Medical Center, 1161 21st Avenue South, Medical Center North, Nashville, TN 37232, United States; Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, 2220 Pierce Avenue, Nashville, TN 37232, United States
| | - Robert J Coffey
- Department of Medicine, Vanderbilt University Medical Center, 1161 21st Avenue South, Medical Center North, Nashville, TN 37232, United States; Department of Cell and Developmental Biology, Vanderbilt University, 465 21st Avenue South, U3218 MRB III, Nashville, TN 37232, United States; Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, 2220 Pierce Avenue, Nashville, TN 37232, United States; Veterans Health Administration, Tennessee Valley Healthcare System, 1310 24th Avenue South, Nashville, TN 37212, United States
| | - H Charles Manning
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, 1161 21(st) Avenue South, Medical Center North, R0102, Nashville, TN 37232, United States; Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, 1161 21st Avenue South, Medical Center North, R0102, Nashville, TN 37232, United States; Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, 1161 21st Avenue South, Medical Center North, Nashville, TN 37232, United States; Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, 2220 Pierce Avenue, Nashville, TN 37232, United States.
| |
Collapse
|
9
|
Cohen AS, Li J, Hight MR, McKinley E, Fu A, Payne A, Liu Y, Zhang D, Xie Q, Bai M, Ayers GD, Tantawy MN, Smith JA, Revetta F, Washington MK, Shi C, Merchant N, Manning HC. TSPO-targeted PET and Optical Probes for the Detection and Localization of Premalignant and Malignant Pancreatic Lesions. Clin Cancer Res 2020; 26:5914-5925. [PMID: 32933996 DOI: 10.1158/1078-0432.ccr-20-1214] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 07/24/2020] [Accepted: 09/10/2020] [Indexed: 12/28/2022]
Abstract
PURPOSE Pancreatic cancer is among the most aggressive malignancies and is rarely discovered early. However, pancreatic "incidentalomas," particularly cysts, are frequently identified in asymptomatic patients through anatomic imaging for unrelated causes. Accurate determination of the malignant potential of cystic lesions could lead to life-saving surgery or spare patients with indolent disease undue risk. Current risk assessment of pancreatic cysts requires invasive sampling, with attendant morbidity and sampling errors. Here, we sought to identify imaging biomarkers of high-risk pancreatic cancer precursor lesions. EXPERIMENTAL DESIGN Translocator protein (TSPO) expression, which is associated with cholesterol metabolism, was evaluated in premalignant and pancreatic cancer lesions from human and genetically engineered mouse (GEM) tissues. In vivo imaging was performed with [18F]V-1008, a TSPO-targeted PET agent, in two GEM models. For image-guided surgery (IGS), V-1520, a TSPO ligand for near-IR optical imaging based upon the V-1008 pharmacophore, was developed and evaluated. RESULTS TSPO was highly expressed in human and murine pancreatic cancer. Notably, TSPO expression was associated with high-grade, premalignant intraductal papillary mucinous neoplasms (IPMNs) and pancreatic intraepithelial neoplasia (PanIN) lesions. In GEM models, [18F]V-1008 exhibited robust uptake in early pancreatic cancer, detectable by PET. Furthermore, V-1520 localized to premalignant pancreatic lesions and advanced tumors enabling real-time IGS. CONCLUSIONS We anticipate that combined TSPO PET/IGS represents a translational approach for precision pancreatic cancer care through discrimination of high-risk indeterminate lesions and actionable surgery.
Collapse
Affiliation(s)
- Allison S Cohen
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jun Li
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Matthew R Hight
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Eliot McKinley
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Allie Fu
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Adria Payne
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Yang Liu
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Dawei Zhang
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Qing Xie
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Mingfeng Bai
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Gregory D Ayers
- Vanderbilt Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Biostatistics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Mohammed Noor Tantawy
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jarrod A Smith
- Vanderbilt University Center for Structural Biology, Vanderbilt University, Nashville, Tennessee
| | - Frank Revetta
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - M Kay Washington
- Vanderbilt Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Chanjuan Shi
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Nipun Merchant
- Vanderbilt Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - H Charles Manning
- Vanderbilt Center for Molecular Probes, Vanderbilt University Medical Center, Nashville, Tennessee. .,Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
| |
Collapse
|
10
|
Madden MZ, Reinfeld BI, Wolf MM, Cohen AS, Manning HC, Rathmell WK, Rathmell JC. Nutrient partitioning in the tumor microenvironment and FDG-PET imaging. The Journal of Immunology 2020. [DOI: 10.4049/jimmunol.204.supp.240.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
The tumor microenvironment is composed of multiple cell types, including malignant cancer cells and tumor-infiltrating leukocytes (TIL). A possible mechanism of immunosuppression in the tumor microenvironment (TME) is cancer cells outcompeting anti-cancer TIL for nutrients such as glucose. 18F-deoxyglucose (FDG) positron emission tomography (PET) imaging is a staple of diagnosing and monitoring many types of cancer and is based on the Warburg model in which cancer cells within the tumor utilize glucose for growth and proliferation. Here, we use magnetic bead sorting to fractionate FDG-avid murine tumors and measure tumor cell-specific glucose uptake. We find that CD45+ immune cells are more FDG-avid than CD45− cancer cells. We further fractionate immune cell subsets into CD4/8+ T cells and CD11b+ myeloid cells to demonstrate that TIL T cells take up more glucose than CD45− cancer cells and resting splenic T cells. Strikingly, CD11b+ myeloid cells are the most FDG-avid cells in the TME. In MC38 colorectal cancer tumors, we show that CD11b+ F4/80 hi macrophages have high glucose uptake, and by extracellular flux analysis demonstrate higher metabolic activity than tumor T cells and CD45− cancer cells. Intriguingly, while glucose uptake is low in CD45− cancer cells, 18F-glutamine uptake is higher in cancer cells than immune cells. Our results illustrate a novel approach to measuring nutrient uptake in the TME and suggest that TIL are not starved of nutrients in the TME. Future work will determine the effects of immunotherapy and metabolism-targeted therapeutics on cell-specific glucose and glutamine uptake in the TME, as well as determine the immune contribution to cancer PET scans in the context of immunotherapy response.
Collapse
Affiliation(s)
- Matthew Z Madden
- 1Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center
| | | | - Melissa M Wolf
- 2Department of Medicine, Vanderbilt University Medical Center
| | | | | | | | - Jeffrey C Rathmell
- 1Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center
- 4Center for Immunobiology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| |
Collapse
|
11
|
Olsen SF, Halldorsson TI, Thorne-Lyman AL, Strøm M, Gørtz S, Granstrøm C, Nielsen PH, Wohlfahrt J, Lykke JA, Langhoff-Roos J, Cohen AS, Furtado JD, Giovannucci EL, Zhou W. Corrigendum to 'Plasma concentrations of long chain N-3 fatty acids in early and mid-pregnancy and risk of early preterm birth'. EBioMedicine 2020; 51:102619. [PMID: 31927481 PMCID: PMC6956750 DOI: 10.1016/j.ebiom.2019.102619] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Affiliation(s)
- S F Olsen
- Centre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark; Department of Nutrition, Harvard TH Chan School of Public Health, Boston, USA.
| | - T I Halldorsson
- Centre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark; Faculty of Food Science and Nutrition, University of Iceland, Reykjavik, Iceland
| | - A L Thorne-Lyman
- Department of Nutrition, Harvard TH Chan School of Public Health, Boston, USA; Center for Human Nutrition, Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, USA
| | - M Strøm
- Centre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark; Faculty of Natural and Health Sciences, University of the Faroe Islands, Torshavn, Faroe Islands
| | - S Gørtz
- Centre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
| | - C Granstrøm
- Centre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
| | - P H Nielsen
- Centre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
| | - J Wohlfahrt
- Centre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
| | - J A Lykke
- Department of Obstetrics, Juliane Marie Centre, Rigshospitalet, University of Copenhagen, Denmark
| | - J Langhoff-Roos
- Department of Obstetrics, Juliane Marie Centre, Rigshospitalet, University of Copenhagen, Denmark
| | - A S Cohen
- Department of Congenital Diseases, Statens Serum Institut, Copenhagen, Denmark
| | - J D Furtado
- Department of Nutrition, Harvard TH Chan School of Public Health, Boston, USA
| | - E L Giovannucci
- Department of Nutrition, Harvard TH Chan School of Public Health, Boston, USA; Department of Epidemiology, Harvard TH Chan School of Public Health, Boston, USA
| | - W Zhou
- Key Lab. of Reproduction Regulation of NPFPC, SIPPR, IRD, Fudan University, Shanghai, China; School of Public Health, Fudan University, Shanghai, China
| |
Collapse
|
12
|
Tang D, Li J, Nickels ML, Huang G, Cohen AS, Manning HC. Preclinical Evaluation of a Novel TSPO PET Ligand 2-(7-Butyl-2-(4-(2-[ 18F]Fluoroethoxy)phenyl)-5-Methylpyrazolo[1,5-a]Pyrimidin-3-yl)-N,N-Diethylacetamide ( 18F-VUIIS1018A) to Image Glioma. Mol Imaging Biol 2019; 21:113-121. [PMID: 29869061 DOI: 10.1007/s11307-018-1198-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
PURPOSE There is an urgent need for the development of novel positron emission tomography (PET) tracers for glioma imaging. In this study, we developed a novel PET probe ([18F]VUIIS1018A) by targeting translocator protein (TSPO), an imaging biomarker for glioma. The purpose of this preclinical study was to evaluate this novel TSPO probe for glioma imaging. PROCEDURES In this study, we synthesized [19F]VUIIS1018A and the precursor for radiosynthesis of [18F]VUIIS1018A. TSPO binding affinity was confirmed using a radioligand competitive binding assay in C6 glioma cell lysate. Further, dynamic imaging studies were performed in rats using a microPET system. These studies include displacement and blocking studies for ligand reversibility and specificity evaluation, and compartment modeling of PET data for pharmacokinetic parameter measurement using metabolite-corrected arterial input functions and PMOD. RESULTS Compared to previously reported TSPO tracers including [18F]VUIIS1008 and [18F]DPA-714, the novel tracer [18F]VUIIS1018A demonstrated higher binding affinity and BPND. Pretreatment with the cold analog [19F]VUIIS1018A could partially block tumor accumulation of this novel tracer. Further, compartment modeling of this novel tracer also exhibited a greater tumor-to-background ratio, a higher tumor binding potential and a lower brain binding potential when compared with other TSPO probes, such as [18F]DPA-714 and [18F]VUIIS1008. CONCLUSIONS These studies illustrate that [18F]VUIIS1018A can serve as a promising TSPO PET tracer for glioma imaging and potentially imaging of other solid tumors.
Collapse
Affiliation(s)
- Dewei Tang
- Center for Molecular Imaging, Shanghai University of Medicine & Health Sciences, Shanghai, China.,Department of Nuclear Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Pudong New District, Shanghai, 200127, China
| | - Jun Li
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, USA.,Vanderbilt Center for Molecular Probes (CMP), Vanderbilt University Medical School, 1161 21st Ave. S., AA 1105 MCN, Nashville, TN, 37232-2310, USA.,Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Michael L Nickels
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, USA.,Vanderbilt Center for Molecular Probes (CMP), Vanderbilt University Medical School, 1161 21st Ave. S., AA 1105 MCN, Nashville, TN, 37232-2310, USA.,Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Gang Huang
- Center for Molecular Imaging, Shanghai University of Medicine & Health Sciences, Shanghai, China.,Department of Nuclear Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Pudong New District, Shanghai, 200127, China
| | - Allison S Cohen
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, USA.,Vanderbilt Center for Molecular Probes (CMP), Vanderbilt University Medical School, 1161 21st Ave. S., AA 1105 MCN, Nashville, TN, 37232-2310, USA
| | - H Charles Manning
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, USA. .,Vanderbilt Center for Molecular Probes (CMP), Vanderbilt University Medical School, 1161 21st Ave. S., AA 1105 MCN, Nashville, TN, 37232-2310, USA. .,Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA. .,Program in Chemical and Physical Biology, Vanderbilt University Medical Center, Nashville, TN, USA. .,Vanderbilt Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN, USA. .,Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA. .,Department of Neurosurgery, Vanderbilt University Medical Center, Nashville, TN, USA.
| |
Collapse
|
13
|
Olsen SF, Halldorsson TI, Thorne-Lyman AL, Strøm M, Gørtz S, Granstrøm C, Nielsen PH, Wohlfahrt J, Lykke JA, Langhoff-Roos J, Cohen AS, Furtado JD, Giovannucci EL, Zhou W. Plasma Concentrations of Long Chain N-3 Fatty Acids in Early and Mid-Pregnancy and Risk of Early Preterm Birth. EBioMedicine 2018; 35:325-333. [PMID: 30082226 PMCID: PMC6156714 DOI: 10.1016/j.ebiom.2018.07.009] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 07/05/2018] [Accepted: 07/09/2018] [Indexed: 12/26/2022] Open
Abstract
Background Fish oil supplementation has been shown to delay spontaneous delivery, but the levels and clinical significance remain uncertain. We examined the association between plasma fatty acids quantified in pregnancy and subsequent risk of early preterm birth. Methods In a case-control design nested in the Danish National Birth Cohort, we identified 376 early preterm cases (<34 gestational weeks, excluding preeclampsia cases) and 348 random controls. Plasma eicosapentaenoic acid plus docosahexaenoic acid (EPA+DHA% of total fatty acids), were measured twice in pregnancy, at gestation weeks 9 and 25 (medians). Odds ratios and 95% confidence intervals (CI's) for associations between EPA+DHA and early preterm risk were estimated by logistic regression, adjusted for the woman's age, height, pre-pregnancy BMI, parity, smoking, and socioeconomic factors. Hypotheses and analytical plan were defined and archived a priori. Findings Analysis using restricted cubic splines of the mean of 1st and 2nd sample measurements showed a strong and significant non-linear association (p < 0.0001) in which the risk of early preterm birth steeply increased when EPA+DHA concentrations were lower than 2% and flattened out at higher levels. Women in the lowest quintile (EPA+DHA < 1.6%) had 10.27 times (95% confidence interval 6.80–15.79, p < 0.0001) increased risk, and women in the second lowest quintile had 2.86 (95% CI 1.79–4.59, p < 0.0001) times increased risk, when compared to women in the three aggregated highest quintiles (EPA+DHA ≥ 1.8%). Interpretation Low plasma concentration of EPA and DHA during pregnancy is a strong risk factor for subsequent early preterm birth in Danish women.
Collapse
Affiliation(s)
- S F Olsen
- Centre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark; Department of Nutrition, Harvard TH Chan School of Public Health, Boston, USA.
| | - T I Halldorsson
- Centre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark; Faculty of Food Science and Nutrition, University of Iceland, Reykjavik, Iceland
| | - A L Thorne-Lyman
- Department of Nutrition, Harvard TH Chan School of Public Health, Boston, USA; Center for Human Nutrition, Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, USA
| | - M Strøm
- Centre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark; Faculty of Natural and Health Sciences, University of the Faroe Islands, Torshavn, Faroe Islands
| | - S Gørtz
- Centre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
| | - C Granstrøm
- Centre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
| | - P H Nielsen
- Centre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
| | - J Wohlfahrt
- Centre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
| | - J A Lykke
- Department of Obstetrics, Juliane Marie Centre, Rigshospitalet, University of Copenhagen, Denmark
| | - J Langhoff-Roos
- Department of Obstetrics, Juliane Marie Centre, Rigshospitalet, University of Copenhagen, Denmark
| | - A S Cohen
- Department of Congenital Diseases, Statens Serum Institut, Copenhagen, Denmark
| | - J D Furtado
- Department of Nutrition, Harvard TH Chan School of Public Health, Boston, USA
| | - E L Giovannucci
- Department of Nutrition, Harvard TH Chan School of Public Health, Boston, USA; Department of Epidemiology, Harvard TH Chan School of Public Health, Boston, USA
| | - W Zhou
- Key Lab. of Reproduction Regulation of NPFPC, SIPPR, IRD, Fudan University, Shanghai, China; School of Public Health, Fudan University, Shanghai, China
| |
Collapse
|
14
|
Cohen AS, Khalil FK, Welsh EA, Schabath MB, Enkemann SA, Davis A, Zhou JM, Boulware DC, Kim J, Haura EB, Morse DL. Cell-surface marker discovery for lung cancer. Oncotarget 2017; 8:113373-113402. [PMID: 29371917 PMCID: PMC5768334 DOI: 10.18632/oncotarget.23009] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 11/11/2017] [Indexed: 12/15/2022] Open
Abstract
Lung cancer is the leading cause of cancer deaths in the United States. Novel lung cancer targeted therapeutic and molecular imaging agents are needed to improve outcomes and enable personalized care. Since these agents typically cannot cross the plasma membrane while carrying cytotoxic payload or imaging contrast, discovery of cell-surface targets is a necessary initial step. Herein, we report the discovery and characterization of lung cancer cell-surface markers for use in development of targeted agents. To identify putative cell-surface markers, existing microarray gene expression data from patient specimens were analyzed to select markers with differential expression in lung cancer compared to normal lung. Greater than 200 putative cell-surface markers were identified as being overexpressed in lung cancers. Ten cell-surface markers (CA9, CA12, CXorf61, DSG3, FAT2, GPR87, KISS1R, LYPD3, SLC7A11 and TMPRSS4) were selected based on differential mRNA expression in lung tumors vs. non-neoplastic lung samples and other normal tissues, and other considerations involving known biology and targeting moieties. Protein expression was confirmed by immunohistochemistry (IHC) staining and scoring of patient tumor and normal tissue samples. As further validation, marker expression was determined in lung cancer cell lines using microarray data and Kaplan–Meier survival analyses were performed for each of the markers using patient clinical data. High expression for six of the markers (CA9, CA12, CXorf61, GPR87, LYPD3, and SLC7A11) was significantly associated with worse survival. These markers should be useful for the development of novel targeted imaging probes or therapeutics for use in personalized care of lung cancer patients.
Collapse
Affiliation(s)
- Allison S Cohen
- Department of Cancer Imaging and Metabolism, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Farah K Khalil
- Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Eric A Welsh
- Biomedical Informatics Shared Resource, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Matthew B Schabath
- Department of Cancer Epidemiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Steven A Enkemann
- Molecular Genomics Shared Resource, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Andrea Davis
- Department of Cancer Imaging and Metabolism, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Jun-Min Zhou
- Biostatistics Shared Resource, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - David C Boulware
- Biostatistics Shared Resource, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Jongphil Kim
- Department of Biostatistics, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA.,Department of Oncologic Sciences, College of Medicine, University of South Florida, Tampa, FL, USA
| | - Eric B Haura
- Department of Thoracic Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - David L Morse
- Department of Cancer Imaging and Metabolism, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA.,Department of Oncologic Sciences, College of Medicine, University of South Florida, Tampa, FL, USA.,Department of Physics, College of Arts and Sciences, University of South Florida, Tampa, FL, USA
| |
Collapse
|
15
|
Cohen AS, Doligalski ML, Zheng H, Tafreshi NK, Estrella V, Delva N, Nguyen J, Beg A, McLaughlin ML, Morse DL. Abstract 1709: Targeting immune checkpoint therapy to the lung tumor microenvironment. Cancer Res 2017. [DOI: 10.1158/1538-7445.am2017-1709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Lung cancer is the leading cause of cancer deaths worldwide. Many lung cancer patients are diagnosed with advanced disease. These patients have a low 5-year survival rate and limited treatment options. Novel therapies, which target biomarkers that are overexpressed in lung cancer but have basal expression in benign tissue, are desperately needed. The goal of this work was to develop a targeted agent for immune checkpoint therapy of lung cancer. Recently, immune checkpoint inhibitors have been approved for use in lung cancer and many more are being tested in clinical trials. The current immune checkpoint inhibitor agents are not tumor-targeted. Targeting the immune checkpoint inhibitor to tumor cell-surface markers should concentrate the conjugate in the tumor microenvironment and enhance the immune response in the tumor while reducing the systemic dosages needed, resulting in lower systemic toxicity.
The delta opioid receptor (DOR) is expressed in some lung cancers, but is not expressed or is expressed only at basal levels in normal tissues outside the brain. We have previously synthesized fluorescently-labeled DOR-targeted imaging agents based on a synthetic peptide antagonist (DORL). These targeted fluorescent agents have high affinity and selectivity for DOR, and exhibit good pharmacokinetic (PK) and biodistribution (BD) profiles, i.e. specific tumor uptake with rapid systemic clearance and no uptake in tissues of concern, e.g. brain. We are now developing lung cancer-specific immunotherapy agents that target the DOR by conjugating DORL to immunomodulatory molecules. In the current work, we synthesized a fluorescently-labeled DOR targeting ligand and conjugated it to an anti-PD1 antibody (DORL-PD1). We synthesized immunoconjugates with several targeting ligand-to-antibody ratios (TARs). We engineered murine lung cancer cells to constitutively express the DOR. By lanthanide time-resolved fluorescence (LTRF) competitive binding assays, we have shown that the agents have high avidity for the DOR in vitro with higher TARs resulting in higher binding avidity. We characterized the uptake of DORL-PD1 in vitro using live-cell fluorescence microscopy. Using syngeneic engraftment tumor models in immunocompetent mice, we performed longitudinal fluorescence imaging studies to determine the agent circulation time (PK), tumor selectivity and tissue distribution (BD). Immune checkpoint efficacy studies were performed using the DOR negative mouse tumor models.
In conclusion, we have synthesized fluorescent DOR-targeted immune checkpoint therapy agents, DORL-PD1; demonstrated avidity and selectivity for the DOR in vitro and in vivo; and immune checkpoint therapy efficacy in vivo. Future studies will evaluate the efficacy of DORL-PD1 in immune competent mice bearing DOR positive tumors. These agents could be useful for increasing the efficacy and reducing systemic toxicity of immune-checkpoint therapy of lung cancer.
Citation Format: Allison S. Cohen, Michael L. Doligalski, Hong Zheng, Narges K. Tafreshi, Veronica Estrella, Nella Delva, Jonathan Nguyen, Amer Beg, Mark L. McLaughlin, David L. Morse. Targeting immune checkpoint therapy to the lung tumor microenvironment [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2017; 2017 Apr 1-5; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2017;77(13 Suppl):Abstract nr 1709. doi:10.1158/1538-7445.AM2017-1709
Collapse
Affiliation(s)
| | | | - Hong Zheng
- 1H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL
| | | | | | - Nella Delva
- 1H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL
| | - Jonathan Nguyen
- 1H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL
| | - Amer Beg
- 1H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL
| | | | - David L. Morse
- 1H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL
| |
Collapse
|
16
|
Verheyen E, Abila R, Akoll P, Albertson C, Antunes D, Banda T, Bills R, Bulirani A, Manda AC, Cohen AS, Cunha-Saraiva F, Derycke S, Donohue I, Du M, Dudu AM, Egger B, Fritzsche K, Frommen JG, Gante HF, Genner MJ, Härer A, Hata H, Irvine K, Mwapu PI, de Bisthoven LJ, Jungwirth A, Kaleme P, Katongo C, Kéver L, Koblmüller S, Konings A, Lamboj A, Lemmel-Schaedelin F, Schiaffino GM, Martens K, Mulungula PM, Meyer A, More HL, Musilova Z, Bukinga FM, Muzumani R, Ntakimazi G, Okello W, Phiri H, Pialek L, Plisnier PD, Raeymaekers JAM, Rajkov J, Rican O, Roberts R, Salzburger W, Schoen I, Sefc KM, Singh P, Skelton P, Snoeks J, Schneider K, Sturmbauer C, Svardal H, Svensson O, Dowdall JT, Turner GF, Tyers A, van Rijssel JC, Van Steenberge M, Vanhove MPM, Weber AT, Weyl O, Ziegelbecker A, Zimmermann H. Oil extraction imperils Africa's Great Lakes. Science 2017; 354:561-562. [PMID: 27811261 DOI: 10.1126/science.aal1722] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
17
|
Abstract
A 44-year-old female with gabapentin-responsive supraorbital neuralgia is presented. She had pre- and post-treatment nociceptive-specific blink reflexes carried out which tracked the good clinical outcome from treatment. The results of the electrophysiological testing imply some central component to the pathophysiology of supra-orbital neuralgia.
Collapse
Affiliation(s)
- A S Cohen
- Headache Group, Institute of Neurology and The National Hospital for Neurology and Neurosurgery, London, UK
| | | | | |
Collapse
|
18
|
Abstract
Paroxysmal hemicrania (PH) is a trigeminal autonomic cephalgia, characterised by unilateral attacks responsive to indomethacin. There are no published reports of a family history in PH. We report a mother and daughter both with PH. The daughter and her sister also had migraine.
Collapse
Affiliation(s)
- A S Cohen
- Headache Group, Institute of Neurology, and The National Hospital for Neurology and Neurosurgery, London, UK
| | | | | |
Collapse
|
19
|
Abstract
SUNCT (Short-lasting Unilateral Neuralgiform headache attacks with Conjunctival injection and Tearing) and SUNA (Short-lasting Unilateral Neuralgiform headache attacks with cranial Autonomic symptoms) are rare primary headache syndromes, classified as Trigeminal Autonomic Cephalalgias (TACs). Hypothalamic involvement in the TACs has been suggested by functional imaging data and clinically with deep brain stimulation. Fifty-two patients (43 SUNCT, 9 SUNA) were studied to determine the clinical phenotype of these conditions and response to medications. A functional imaging study explored activation of the posterior hypothalamus in attacks of SUNCT/SUNA. The clinical study characterised SUNCT and SUNA in terms of epidemiology, phenotype and clinical characteristics. Indomethacin is ineffective on single-blind testing. Intravenous lidocaine was effective in all cases. Open-label trails showed the effectiveness of lamotrigine, topiramate and gabapentin. On functional imaging there was hypothalamic activation bilaterally in 5/9 SUNCT patients, and contralaterally in two patients. Two SUNCT patients had ipsilateral negative activation. In SUNA the activation was bilaterally negative. There was no hypothalamic activation in a patient with SUNCT secondary to a brainstem lesion. The data suggests that there should be revised classification for SUNCT and SUNA, with an increased range of attack duration and frequency, cutaneous triggering of attacks, and a lack of refractory period. The concept of ‘attack load’ is introduced. The lack of response to indomethacin and the response to intravenous lidocaine, are useful in diagnostic and therapeutic terms, respectively. Preventive treatments include lamotrigine, gabapentin and topiramate. The role of hypothalamic involvement in SUNCT and SUNA as TACs is considered.
Collapse
Affiliation(s)
- A S Cohen
- Headache Group, Institute of Neurology, London, UK.
| |
Collapse
|
20
|
Affiliation(s)
- A S Cohen
- Headache Group, Institute of Neurology, Queen Square, London, UK
| | | | | |
Collapse
|
21
|
Abstract
Short-lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT) is a primary headache syndrome that has been reported to be resistant to treatment with intravenous lidocaine. We report four cases of SUNCT in whom intravenous lidocaine (1.3-3.3 mg kg−1 h−1) completely suppressed the headaches for the duration of the infusion. The headache returned after cessation of treatment. Two patients went on to have their symptoms controlled on topiramate (50-300 mg daily). One patient had typical migrainous aura in association with some of the attacks of pain but never migrainous headaches. These cases suggest that treatment with lidocaine can be considered when acute intervention is required to suppress a severe exacerbation of SUNCT, and further broaden the therapeutic and clinical background of this syndrome.
Collapse
Affiliation(s)
- M S Matharu
- Headache Group, Institute of Neurology and The National Hospital for Neurology and Neurosurgery, London, UK
| | | | | |
Collapse
|
22
|
Huynh AS, Estrella V, Stark VE, Cohen AS, Chen T, Casagni TJ, Josan JS, Lloyd MC, Johnson J, Hruby VJ, Vagner J, Morse DL. Tumor Targeting and Pharmacokinetics of a Near-Infrared Fluorescent-Labeled δ-Opioid Receptor Antagonist Agent, Dmt-Tic-Cy5. Mol Pharm 2016; 13:534-44. [PMID: 26713599 PMCID: PMC4936951 DOI: 10.1021/acs.molpharmaceut.5b00760] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [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] [Indexed: 02/08/2023]
Abstract
Fluorescence molecular imaging can be employed for the development of novel cancer targeting agents. Herein, we investigated the pharmacokinetics (PK) and cellular uptake of Dmt-Tic-Cy5, a delta-opioid receptor (δOR) antagonist-fluorescent dye conjugate, as a tumor-targeting molecular imaging agent. δOR expression is observed normally in the CNS, and pathologically in some tumors, including lung liver and breast cancers. In vitro, in vivo, and ex vivo experiments were conducted to image and quantify the fluorescence signal associated with Dmt-Tic-Cy5 over time using in vitro and intravital fluorescence microscopy and small animal fluorescence imaging of tumor-bearing mice. We observed specific retention of Dmt-Tic-Cy5 in tumors with maximum uptake in δOR-expressing positive tumors at 3 h and observable persistence for >96 h; clearance from δOR nonexpressing negative tumors by 6 h; and systemic clearance from normal organs by 24 h. Live-cell and intravital fluorescence microscopy demonstrated that Dmt-Tic-Cy5 had sustained cell-surface binding lasting at least 24 h with gradual internalization over the initial 6 h following administration. Dmt-Tic-Cy5 is a δOR-targeted agent that exhibits long-lasting and specific signal in δOR-expressing tumors, is rapidly cleared from systemic circulation, and is not retained in non-δOR-expressing tissues. Hence, Dmt-Tic-Cy5 has potential as a fluorescent tumor imaging agent.
Collapse
Affiliation(s)
- Amanda Shanks Huynh
- Department of Cancer Imaging & Metabolism, H. Lee Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL 33612
| | - Veronica Estrella
- Department of Cancer Imaging & Metabolism, H. Lee Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL 33612
| | - Valerie E. Stark
- Department of Cancer Imaging & Metabolism, H. Lee Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL 33612
| | - Allison S. Cohen
- Department of Cancer Imaging & Metabolism, H. Lee Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL 33612
| | - Tingan Chen
- Analytic Microscopy Core, H. Lee Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL 33612
| | - Todd J. Casagni
- Department of Comparative Medicine, H. Lee Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive Tampa, FL 33612
| | - Jatinder S. Josan
- Department of Chemistry, The University of Arizona, 1306 E University Blvd., Tucson, AZ 85719
| | - Mark C. Lloyd
- Analytic Microscopy Core, H. Lee Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL 33612
| | - Joseph Johnson
- Analytic Microscopy Core, H. Lee Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL 33612
| | - Victor J. Hruby
- Department of Chemistry, The University of Arizona, 1306 E University Blvd., Tucson, AZ 85719
| | - Josef Vagner
- The BIO5 Research Institute, University of Arizona, 1657 E Helen Street, Tucson, Arizona 85721
| | - David L. Morse
- Department of Cancer Imaging & Metabolism, H. Lee Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL 33612
| |
Collapse
|
23
|
Cohen AS, Patek R, Enkemann SA, Johnson JO, Chen T, Toloza E, Vagner J, Morse DL. Delta-Opioid Receptor (δOR) Targeted Near-Infrared Fluorescent Agent for Imaging of Lung Cancer: Synthesis and Evaluation In Vitro and In Vivo. Bioconjug Chem 2015; 27:427-38. [PMID: 26488422 DOI: 10.1021/acs.bioconjchem.5b00516] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
In the United States, lung cancer is the leading cause of cancer death and ranks second in the number of new cases annually among all types of cancers. Better methods or tools for diagnosing and treating this disease are needed to improve patient outcomes. The delta-opioid receptor (δOR) is reported to be overexpressed in lung cancers and not expressed in normal lung. Thus, we decided to develop a lung cancer-specific imaging agent targeting this receptor. We have previously developed a δOR-targeted fluorescent imaging agent based on a synthetic peptide antagonist (Dmt-Tic) conjugated to a Cy5 fluorescent dye. In this work, we describe the synthesis of Dmt-Tic conjugated to a longer wavelength near-infrared fluorescent (NIRF) dye, Li-cor IR800CW. Binding affinity of Dmt-Tic-IR800 for the δOR was studied using lanthanide time-resolved fluorescence (LTRF) competitive binding assays in cells engineered to overexpress the δOR. In addition, we identified lung cancer cell lines with high and low endogenous expression of the δOR. We confirmed protein expression in these cell lines using confocal fluorescence microscopy imaging and used this technique to estimate the cell-surface receptor number in the endogenously expressing lung cancer cell lines. The selectivity of Dmt-Tic-IR800 for imaging of the δOR in vivo was shown using both engineered cell lines and endogenously expressing lung cancer cells in subcutaneous xenograft models in mice. In conclusion, the δOR-specific fluorescent probe developed in this study displays excellent potential for imaging of lung cancer.
Collapse
Affiliation(s)
| | - Renata Patek
- BIO5 Institute, University of Arizona , Tucson, Arizona 85721, United States
| | | | | | | | - Eric Toloza
- Departments of Surgery and of Oncologic Sciences, University of South Florida Morsani College of Medicine , Tampa, Florida 33612, United States
| | - Josef Vagner
- BIO5 Institute, University of Arizona , Tucson, Arizona 85721, United States
| | | |
Collapse
|
24
|
Baron-Cohen S, Auyeung B, Nørgaard-Pedersen B, Hougaard DM, Abdallah MW, Melgaard L, Cohen AS, Chakrabarti B, Ruta L, Lombardo MV. Elevated fetal steroidogenic activity in autism. Mol Psychiatry 2015; 20:369-76. [PMID: 24888361 PMCID: PMC4184868 DOI: 10.1038/mp.2014.48] [Citation(s) in RCA: 308] [Impact Index Per Article: 34.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Revised: 03/25/2014] [Accepted: 03/27/2014] [Indexed: 12/16/2022]
Abstract
Autism affects males more than females, giving rise to the idea that the influence of steroid hormones on early fetal brain development may be one important early biological risk factor. Utilizing the Danish Historic Birth Cohort and Danish Psychiatric Central Register, we identified all amniotic fluid samples of males born between 1993 and 1999 who later received ICD-10 (International Classification of Diseases, 10th Revision) diagnoses of autism, Asperger syndrome or PDD-NOS (pervasive developmental disorder not otherwise specified) (n=128) compared with matched typically developing controls. Concentration levels of Δ4 sex steroids (progesterone, 17α-hydroxy-progesterone, androstenedione and testosterone) and cortisol were measured with liquid chromatography tandem mass spectrometry. All hormones were positively associated with each other and principal component analysis confirmed that one generalized latent steroidogenic factor was driving much of the variation in the data. The autism group showed elevations across all hormones on this latent generalized steroidogenic factor (Cohen's d=0.37, P=0.0009) and this elevation was uniform across ICD-10 diagnostic label. These results provide the first direct evidence of elevated fetal steroidogenic activity in autism. Such elevations may be important as epigenetic fetal programming mechanisms and may interact with other important pathophysiological factors in autism.
Collapse
Affiliation(s)
- S Baron-Cohen
- Autism Research Centre, Department of Psychiatry, University of Cambridge, Cambridge, UK,Autism Research Centre, Department of Psychiatry, University of Cambridge, Douglas House, 18B Trumpington Road, Cambridge CB2 8AH, UK. E-mail:
| | - B Auyeung
- Autism Research Centre, Department of Psychiatry, University of Cambridge, Cambridge, UK,Department of Psychology, University of Edinburgh, Edinburgh, UK
| | - B Nørgaard-Pedersen
- Department of Clinical Biochemistry and Immunology, Statens Serum Institute Copenhagen, Copenhagen, Denmark
| | - D M Hougaard
- Department of Clinical Biochemistry and Immunology, Statens Serum Institute Copenhagen, Copenhagen, Denmark
| | - M W Abdallah
- Department of Clinical Biochemistry and Immunology, Statens Serum Institute Copenhagen, Copenhagen, Denmark,Department of Child and Adolescent Neuropsychiatry, Rostock University Medical Centre, Rostock, Germany,Section for Epidemiology, Department of Public Health, Aarhus University, Aarhus, Denmark
| | - L Melgaard
- Department of Clinical Biochemistry and Immunology, Statens Serum Institute Copenhagen, Copenhagen, Denmark
| | - A S Cohen
- Department of Clinical Biochemistry and Immunology, Statens Serum Institute Copenhagen, Copenhagen, Denmark
| | - B Chakrabarti
- Autism Research Centre, Department of Psychiatry, University of Cambridge, Cambridge, UK,Centre for Integrative Neuroscience and Neurodynamics, School of Psychology and Clinical Language Sciences, University of Reading, Reading, UK
| | - L Ruta
- Autism Research Centre, Department of Psychiatry, University of Cambridge, Cambridge, UK,Division of Child Neurology and Psychiatry, Stella Maris Scientific Institute, Pisa, Italy
| | - M V Lombardo
- Autism Research Centre, Department of Psychiatry, University of Cambridge, Cambridge, UK,Department of Psychology, University of Cyprus, Nicosia, Cyprus,Centre for Applied Neuroscience, University of Cyprus, Nicosia, Cyprus
| |
Collapse
|
25
|
Rejniak KA, Estrella V, Chen T, Cohen AS, Lloyd MC, Morse DL. The role of tumor tissue architecture in treatment penetration and efficacy: an integrative study. Front Oncol 2013; 3:111. [PMID: 23717812 PMCID: PMC3650652 DOI: 10.3389/fonc.2013.00111] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Accepted: 04/22/2013] [Indexed: 12/02/2022] Open
Abstract
Despite the great progress that has been made in understanding cancer biology and the potential molecular targets for its treatment, the majority of drugs fail in the clinical trials. This may be attributed (at least in part) to the complexity of interstitial drug transport in the patient’s body, which is hard to test experimentally. Similarly, recent advances in molecular imaging have led to the development of targeted biomarkers that can predict pharmacological responses to therapeutic interventions. However, both the drug and biomarker molecules need to access the tumor tissue and be taken up into individual cells in concentrations sufficient to exert the desired effect. To investigate the process of drug penetration at the mesoscopic level we developed a computational model of interstitial transport that incorporates the biophysical properties of the tumor tissue, including its architecture and interstitial fluid flow, as well as the properties of the agents. This model is based on the method of regularized Stokeslets to describe the fluid flow coupled with discrete diffusion-advection-reaction equations to model the dynamics of the drugs. Our results show that the tissue cellular porosity and density influence the depth of penetration in a non-linear way, with sparsely packed tissues being traveled through more slowly than the denser tissues. We demonstrate that irregularities in the cell spatial configurations result in the formation of interstitial corridors that are followed by agents leading to the emergence of tissue zones with less exposure to the drugs. We describe how the model can be integrated with in vivo experiments to test the extravasation and penetration of the targeted biomarkers through the tumor tissue. A better understanding of tissue- or compound-specific factors that limit the penetration through the tumors is important for non-invasive diagnoses, chemotherapy, the monitoring of treatment responses, and the detection of tumor recurrence.
Collapse
Affiliation(s)
- Katarzyna A Rejniak
- Integrated Mathematical Oncology, H. Lee Moffitt Cancer Center and Research Institute Tampa, FL, USA ; Department of Oncologic Sciences, College of Medicine, University of South Florida Tampa, FL, USA
| | | | | | | | | | | |
Collapse
|
26
|
JeuneSmith Y, Cohen AS, Tafreshi NK, Vagner J, Gillies R, Morse D. Abstract 5519: In vivo fluorescence lifetime imaging differentiates the bound versus unbound status of a cell surface receptor targeted ligand. Cancer Res 2013. [DOI: 10.1158/1538-7445.am2013-5519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
In vivo fluorescence lifetime imaging allows for the isolation of probe-specific fluorescence lifetime from surrounding tissue auto-fluorescence. Fluorescence lifetime is not affected by agent concentration or depth, or image acquisition parameters. However, fluorescence lifetime can be affected by the in vivo tissue microenvironment, e.g. pH or hypoxia. In this work, fluorescence lifetime is used to characterize the presence and fate of a high-affinity peptidyl delta opioid receptor (δOR) ligand conjugated to the near-infrared fluorescent IRDye800CW (Li-Cor).
HCT116 colorectal cancer cells engineered to over-express the δOR and parental non-expressing HCT116 cells were bilaterally xenografted subcutaneously into the flanks of athymic nude mice. At a series of time-points following tail vein injection of the ligand, in vivo fluorescence images images were acquired using the Optix MX3 scanner (Advanced Research Technologies).
For 24 h, the ligand fluoresence lifetime was significantly different (p<0.05) in the δOR positive tumors relative to the negative tumors. At 48 hours, the fluorescence lifetime in the negative tumor decreased and was no longer different. We hypothesize that the early difference in fluorescence lifetime is attributed to the bound state of the ligand on receptor positive tumors relative to the unbound state in negative tumors. Over time, unbound ligand clears from the negative tumor leaving only a low concentration of ligand retained by non-specific interactions.
In vitro studies demonstrated that the fluoresecence lifetime of this ligand is not altered within the biological pH range. However, the tumor microenvironment is complex and multiple factors may be influencing the observed differences. Future plans include studies of 3D cell cultures using varied microenvironmental conditions and studies on δOR endogenous cell lines.
Citation Format: Yoli JeuneSmith, Allison S. Cohen, Narges K. Tafreshi, Josef Vagner, Robert Gillies, David Morse. In vivo fluorescence lifetime imaging differentiates the bound versus unbound status of a cell surface receptor targeted ligand. [abstract]. In: Proceedings of the 104th Annual Meeting of the American Association for Cancer Research; 2013 Apr 6-10; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2013;73(8 Suppl):Abstract nr 5519. doi:10.1158/1538-7445.AM2013-5519
Collapse
Affiliation(s)
| | | | | | - Josef Vagner
- 2Bio5 Institute, University of Arizona, Tucson, AZ
| | | | - David Morse
- 1Moffitt Cancer Center & Research Institute, Tampa, FL
| |
Collapse
|
27
|
Henkin AH, Cohen AS, Dubikovskaya EA, Park HM, Nikitin GF, Auzias MG, Kazantzis M, Bertozzi CR, Stahl A. Real-time noninvasive imaging of fatty acid uptake in vivo. ACS Chem Biol 2012; 7:1884-91. [PMID: 22928772 DOI: 10.1021/cb300194b] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Detection and quantification of fatty acid fluxes in animal model systems following physiological, pathological, or pharmacological challenges is key to our understanding of complex metabolic networks as these macronutrients also activate transcription factors and modulate signaling cascades including insulin sensitivity. To enable noninvasive, real-time, spatiotemporal quantitative imaging of fatty acid fluxes in animals, we created a bioactivatable molecular imaging probe based on long-chain fatty acids conjugated to a reporter molecule (luciferin). We show that this probe faithfully recapitulates cellular fatty acid uptake and can be used in animal systems as a valuable tool to localize and quantitate in real time lipid fluxes such as intestinal fatty acid absorption and brown adipose tissue activation. This imaging approach should further our understanding of basic metabolic processes and pathological alterations in multiple disease models.
Collapse
Affiliation(s)
| | | | - Elena A. Dubikovskaya
- Institute of Chemical Sciences
and Engineering, École Polytechnique Fédérale de Lausanne, LCBIM, 1015 Lausanne, Switzerland
| | | | - Gennady F. Nikitin
- Institute of Chemical Sciences
and Engineering, École Polytechnique Fédérale de Lausanne, LCBIM, 1015 Lausanne, Switzerland
| | - Mathieu G. Auzias
- Institute of Chemical Sciences
and Engineering, École Polytechnique Fédérale de Lausanne, LCBIM, 1015 Lausanne, Switzerland
| | | | | | | |
Collapse
|
28
|
Abstract
![]()
Cell-surface glycans are attractive targets for molecule imaging due to their reflection of cellular processes associated with development and disease progression. In this paper, we describe the design, synthesis, and biological application of a new phosphine probe for real-time imaging of cell-surface glycans using bioluminescence. To accomplish this goal, we took advantage of the bioorthogonal chemical reporter technique. This strategy uses a two-step labeling procedure in which an unnatural sugar analogue containing a functional handle is (1) incorporated into sugar-bearing proteins via the cell’s own biosynthetic machinery and then (2) detected with an exogenously added probe. We designed phosphine−luciferin reagent 1 to activate bioluminescence in response to Staudinger ligation with azide-labeled glycans. We chose to use a phosphine probe because, despite their slow reaction kinetics, they remain the best-performing reagents for tagging azidosugars in mice. Given the sensitivity and negligible background provided by bioluminescence imaging (BLI), we reasoned that 1 might be able to overcome some of the limitations encountered with fluorescent phosphine probes. In this work, we synthesized the first phosphine−luciferin probe for use in real-time BLI and demonstrated that azide-labeled cell-surface glycans can be imaged with 1 using concentrations as low as single digit nanomolar and times as little as 5 min, a feat that cannot be matched by any previous fluorescent phosphine probes. Even though we have only demonstrated its use in visualizing glycans, it can be envisioned that this probe could also be used for bioluminescence imaging of any azide-containing biomolecule, such as proteins and lipids, since azides have been previously incorporated into these molecules. The phosphine−luciferin probe is therefore poised for many applications in real-time imaging in cells and whole animals. These studies are currently in progress in our laboratory.
Collapse
Affiliation(s)
- Allison S Cohen
- Department of Chemistry, Howard Hughes Medical Institute, University of California, and The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | | | | | | |
Collapse
|
29
|
Thakkar A, Cohen AS, Connolly MD, Zuckermann RN, Pei D. High-throughput sequencing of peptoids and peptide-peptoid hybrids by partial edman degradation and mass spectrometry. ACTA ACUST UNITED AC 2010; 11:294-302. [PMID: 19154119 DOI: 10.1021/cc8001734] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A method for the rapid sequence determination of peptoids [oligo(N-substituted glycines)] and peptide-peptoid hybrids selected from one-bead-one-compound combinatorial libraries has been developed. In this method, beads carrying unique peptoid (or peptide-peptoid) sequences were subjected to multiple cycles of partial Edman degradation (PED) by treatment with a 1:3 (mol/mol) mixture of phenyl isothiocyanate (PITC) and 9-fluorenylmethyl chloroformate (Fmoc-Cl) to generate a series of N-terminal truncation products for each resin-bound peptoid. After PED, the Fmoc group was removed from the N-terminus and any reacted side chains via piperidine treatment. The resulting mixture of the full-length peptoid and its truncation products was analyzed by matrix-assisted laser desorption ionization (MALDI) mass spectrometry, to reveal the sequence of the full-length peptoid. With a slight modification, the method was also effective in the sequence determination of peptide-peptoid hybrids. This rapid, high-throughput, sensitive, and inexpensive sequencing method should greatly expand the utility of combinatorial peptoid libraries in biomedical and materials research.
Collapse
Affiliation(s)
- Amit Thakkar
- Department of Chemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, USA
| | | | | | | | | |
Collapse
|
30
|
Abstract
Chronic paroxysmal hemicrania (CPH) is a rare primary headache syndrome, which is classified along with cluster headache and short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing (SUNCT) as a trigeminal autonomic cephalalgia. CPH is exquisitely responsive to indomethacin, so much so that the response is one of the current diagnostic criteria. The case of a patient with CPH, who had marked epigastric symptoms with indomethacin treatment and responded well to topiramate 150 mg daily, is reported. Cessation of topiramate caused return of episodes, and the response has persisted for 2 years. Topiramate may be a treatment option in CPH.
Collapse
Affiliation(s)
- A S Cohen
- Headache Group, Institute of Neurology, The National Hospital for Neurology and Neurosurgery, Queen Square, London, UK
| | | |
Collapse
|
31
|
Abstract
OBJECTIVE Socioenvironmental stressors have been linked with increased symptom severity and relapse in those with schizophrenia. However, little is known about how individual differences in stress reactivity may contribute to these outcomes. METHOD This study examined the association between the temperament characteristic of arousability and changes in negative affect and cardiovascular activity during a challenge task in 58 in-patients with diagnosis of schizophrenia and 21 controls. RESULTS In the patient group, levels of arousability were significantly associated with increases in negative affect in response to the task and greater severity of affective symptoms. Levels of arousability were associated with decreased heart rate during the challenge task in our patient group. CONCLUSION These findings suggest that greater attention be given to individual differences, such as temperament and personality characteristics, and their role in the experience of stressors, including emotional and physiological response, as well as symptom development.
Collapse
Affiliation(s)
- T J Dinzeo
- Department of Psychology, Kent State University, Kent, OH, USA.
| | | | | | | |
Collapse
|
32
|
Irimia P, Cittadini E, Paemeleire K, Cohen AS, Goadsby PJ. Unilateral photophobia or phonophobia in migraine compared with trigeminal autonomic cephalalgias. Cephalalgia 2008; 28:626-30. [PMID: 18422722 DOI: 10.1111/j.1468-2982.2008.01565.x] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Our objective was to compare the presence of self-reported unilateral photophobia or phonophobia, or both, during headache attacks comparing patients with trigeminal autonomic cephalalgias (TACs)--including cluster headache, short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing (SUNCT) and paroxysmal hemicrania--or hemicrania continua, and other headache types. We conducted a prospective study in patients attending a referral out-patient clinic over 5 months and those admitted for an intramuscular indomethacin test. Two hundred and six patients were included. In episodic migraine patients, two of 54 (4%) reported unilateral photophobia or phonophobia, or both. In chronic migraine patients, six of 48 (13%) complained of unilateral photophobia or phonophobia, or both, whereas none of the 24 patients with medication-overuse headache reported these unilateral symptoms, although these patients all had clinical symptoms suggesting the diagnosis of migraine. Only three of 22 patients (14%) suffering from new daily persistent headache (NDPH) experienced unilateral photophobia or phonophobia. In chronic cluster headache 10 of 21 patients (48%) had unilateral photophobia or phonophobia, or both, and this symptom appeared in four of five patients (80%) with episodic cluster headache. Unilateral photophobia or phonophobia, or both, were reported by six of 11 patients (55%) with hemicrania continua, five of nine (56%) with SUNCT, and four of six (67%) with chronic paroxysmal hemicrania. Unilateral phonophobia or photophobia, or both, are more frequent in TACs and hemicrania continua than in migraine and NDPH. The presence of these unilateral symptoms may be clinically useful in the differential diagnosis of primary headaches.
Collapse
Affiliation(s)
- P Irimia
- Headache Group, Institute of Neurology, The National Hospital for Neurology and Neurosurgery, London, UK
| | | | | | | | | |
Collapse
|
33
|
Muñoz Z, Cohen AS, Nguyen LM, McIntosh TA, Hoggard PE. Photocatalysis by tetraphenylporphyrin of the decomposition of chloroform. Photochem Photobiol Sci 2008; 7:337-43. [DOI: 10.1039/b713270k] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
34
|
Royo NC, LeBold D, Magge SN, Chen I, Hauspurg A, Cohen AS, Watson DJ. Neurotrophin-mediated neuroprotection of hippocampal neurons following traumatic brain injury is not associated with acute recovery of hippocampal function. Neuroscience 2007; 148:359-70. [PMID: 17681695 PMCID: PMC2579330 DOI: 10.1016/j.neuroscience.2007.06.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2007] [Revised: 06/12/2007] [Accepted: 06/18/2007] [Indexed: 11/23/2022]
Abstract
Traumatic brain injury (TBI) causes selective hippocampal cell death which is believed to be associated with the cognitive impairment observed in both clinical and experimental settings. The endogenous neurotrophin-4/5 (NT-4/5), a TrkB ligand, has been shown to be neuroprotective for vulnerable CA3 pyramidal neurons after experimental brain injury. In this study, infusion of recombinant NT-4/5 increased survival of CA2/3 pyramidal neurons to 71% after lateral fluid percussion brain injury in rats, compared with 55% in vehicle-treated controls. The functional outcome of this NT-4/5-mediated neuroprotection was examined using three hippocampal-dependent behavioral tests. Injury-induced impairment was evident in all three tests, but interestingly, there was no treatment-related improvement in any of these measures. Similarly, injury-induced decreased excitability in the Schaffer collaterals was not affected by NT-4/5 treatment. We propose that a deeper understanding of the factors that link neuronal survival to recovery of function will be important for future studies of potentially therapeutic agents.
Collapse
Affiliation(s)
- N C Royo
- Department of Neurosurgery, 371A Stemmler Hall/6071, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA.
| | | | | | | | | | | | | |
Collapse
|
35
|
Abstract
Chronic paroxysmal hemicrania (CPH) is a rare primary headache syndrome, which is classified along with cluster headache and short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing (SUNCT) as a trigeminal autonomic cephalalgia. CPH is exquisitely responsive to indomethacin so much so that the response is one of the current diagnostic criteria. The case of a patient with CPH, who had marked epigastric symptoms with indomethacin treatment and responded well to topiramate 150 mg daily, is reported. Cessation of topiramate caused return of episodes, and the response has persisted for 2 years. Topiramate may be a treatment option in CPH.
Collapse
Affiliation(s)
- A S Cohen
- Headache Group, Institute of Neurology, The National Hospital for Neurology and Neurosurgery, Queen Square, London, UK
| | | |
Collapse
|
36
|
Abstract
Traumatic brain injury (TBI) is a significant health issue that often causes enduring cognitive deficits, in particular memory dysfunction. The hippocampus, a structure crucial in learning and memory, is frequently damaged during TBI. Since long-term potentiation (LTP) is the leading cellular model underlying learning and memory, this study was undertaken to examine how injury affects area CA1 LTP in mice using lateral fluid percussion injury (FPI). Brain slices derived from FPI animals demonstrated an inability to induce LTP in area CA1 7 days postinjury. However, area CA1 long-term depression could be induced in neurons 7 days postinjury, demonstrating that some forms of synaptic plasticity can still be elicited. Using a multi-disciplined approach, potential mechanisms underlying the inability to induce and maintain area CA1 LTP were investigated. This study demonstrates that injury leads to significantly smaller N-methyl-D-aspartate potentials and glutamate-induced excitatory currents, increased dendritic spine size, and decreased expression of alpha-calcium calmodulin kinase II. These findings may underlie the injury-induced lack of LTP and thus, contribute to cognitive impairments often associated with TBI. Furthermore, these results provide attractive sites for potential therapeutic intervention directed toward alleviating the devastating consequences of human TBI.
Collapse
Affiliation(s)
- E Schwarzbach
- Division of Neurology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA.
| | | | | | | |
Collapse
|
37
|
Witgen BM, Lifshitz J, Smith ML, Schwarzbach E, Liang SL, Grady MS, Cohen AS. Regional hippocampal alteration associated with cognitive deficit following experimental brain injury: a systems, network and cellular evaluation. Neuroscience 2005; 133:1-15. [PMID: 15893627 DOI: 10.1016/j.neuroscience.2005.01.052] [Citation(s) in RCA: 144] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2004] [Revised: 12/10/2004] [Accepted: 01/17/2005] [Indexed: 10/25/2022]
Abstract
Cognitive deficits persist in patients who survive traumatic brain injury (TBI). Lateral fluid percussion brain injury in the mouse, a model of human TBI, results in hippocampal-dependent cognitive impairment, similar to retrograde amnesia often associated with TBI. To identify potential substrates of the cognitive impairment, we evaluated regional neuronal loss, regional hippocampal excitability and inhibitory synaptic transmission. Design-based stereology demonstrated an approximate 40% loss of neurons through all subregions of the hippocampus following injury compared with sham. Input/output curves recorded in slices of injured brain demonstrated increased net synaptic efficacy in the dentate gyrus in concert with decreased net synaptic efficacy and excitatory postsynaptic potential-spike relationship in area CA1 compared with sham slices. Pharmacological agents modulating inhibitory transmission partially restored regional injury-induced alterations in net synaptic efficacy. Both evoked and spontaneous miniature inhibitory postsynaptic currents (mIPSCs) recorded in surviving dentate granule neurons were smaller and less frequent in injured brains than in uninjured brains. Conversely, both evoked and spontaneous mIPSCs recorded in surviving area CA1 pyramidal neurons were larger in injured brains than in uninjured brains. Together, these alterations suggest that regional hippocampal function is altered in the injured brain. This study demonstrates for the first time that brain injury selectively disrupts hippocampal function by causing uniform neuronal loss, inhibitory synaptic dysfunction, and regional, but opposing, shifts in circuit excitability. These changes may contribute to the cognitive impairments that result from brain injury.
Collapse
Affiliation(s)
- B M Witgen
- Department of Neurosurgery, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
| | | | | | | | | | | | | |
Collapse
|
38
|
Bourque AJ, Clark SP, Kloss A, Wang BH, Cohen AS. Characterization of quaternary ammonium oligomers by paired-ion reversed-phase liquid chromatography-mass spectrometry. Anal Chem 2005; 77:2810-7. [PMID: 15859597 DOI: 10.1021/ac048868l] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The separation of novel permanently charged oligomers was studied using paired-ion reversed-phase liquid chromatography. The polyionene studied is less than 5 kDa in size, but contains three oligomer series with different end-group chemistries. The complexity of this polyionene makes development of a single-dimension separation quite challenging. Separation under critical conditions was employed to fractionate the end-group conformations and then the chain length of the oligomers in each series was confirmed by LC-MS. The oligomers were then used to optimize a single-dimension HPLC separation. Precise modulation of the hydrophobicity of the ion-pair reagent and the stationary-phase chemistry yielded very high resolution one-dimensional separations.
Collapse
Affiliation(s)
- A J Bourque
- Analytical Research and Development, Genzyme Drug Discovery and Development, Genzyme Corporation, 153 Second Avenue, Waltham, Massachusetts 02451, USA
| | | | | | | | | |
Collapse
|
39
|
Paweska JT, Smith SJ, Wright IM, Williams R, Cohen AS, Van Dijk AA, Grobbelaar AA, Croft JE, Swanepoel R, Gerdes GH. Indirect enzyme-linked immunosorbent assay for the detection of antibody against Rift Valley fever virus in domestic and wild ruminant sera. Onderstepoort J Vet Res 2003; 70:49-64. [PMID: 12825681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023] Open
Abstract
An indirect enzyme-linked immunosorbent assay (I-ELISA) for the detection of specific IgG immunoglobulins against Rift Valley fever virus (RVFV) was validated in-house. A total of 3055 sera from sheep (n = 1159), goats (n = 636), cattle (n = 203), African buffalo (n = 928), and other wild ruminants (n = 129), including eland, kudu, and black wildebeest, was used. Sera from domestic ruminants were collected in West (n = 10), South (n = 1654) and East Africa (n = 334), and sera from wild ruminants (n = 1064) were collected in South Africa. In addition, 136 sera from eight experimentally RVFV-infected sheep, taken during a period of 28 days post infection (dpi), were used to study the kinetics of RVFV antibody production. Field sera were tested by the serum neutralization (VN) test and experimental sera by VN and haemagglutination-inhibition (HI) test. Based on VN test results, negative sera were regarded as reference controls from RVFV-free, and positive sera were regarded as reference controls from RVFV-infected subpopulations of animals. ELISA data were expressed as the percentage positivity (PP) of an internal high positive control. The two-graph receiver operating characteristics approach was used for the selection and optimization of I-ELISA cut-offs including the misclassification costs term and Youden index (J). In addition, cut-off values were determined as the mean plus two-fold standard deviation of the result observed with the RVFV-free subpopulations. Established optimal cut-offs were different for each of the data sets analyzed, and ranged from 1.65 PP (buffalo) to 9.1 PP (goats). At the cut-off giving the highest estimate of combined measure of diagnostic accuracy (highest J value), the I-ELISA test parameters were determined as follows: (1) Diagnostic sensitivity (%): cattle--84.31, buffalo--94.44, sheep--98.91, goats--99.18. (2) Diagnostic specificity (%): cattle--99.34, buffalo--98.28, sheep--99.16, goats--99.23 and other game ruminants--99.26. In the group of RVFV-experimentally infected sheep, seroconversion In all individuals was detected by VN on 4-6 dpi, by HI on 5-7 dpi, and by I-ELISA on 6-7 dpi. All tests showed the same kinetic pattern of immunological response. Antibody levels were low for a very short period before increasing to high titres, after which it was easily detectable by all tests. Compared to traditional tests, the lower sensitivity of I-ELISA in the detection of the earliest stage of immunological response may be practically insignificant, particularily when this assay is used in population-based, disease-surveillance programmes. The high sensitivity and specificity of I-ELISA established in this study, especially for the statistically more representative subpopulations of animals tested, seem to support this prediction. Test parameters determined in this study should, however, be regarded as in-house diagnostic decision limits, for which further updating is recommended, particularly for specimens from other countries, and preferably by applying a standardized method for sampling of new subpopulations of animals to be targeted by the assay.
Collapse
Affiliation(s)
- J T Paweska
- Onderstepoort Veterinary Institute, Private Bag X05, Onderstepoort, 0110 South Africa.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Abstract
The NMDA subtype of glutamate receptor plays an important role in the molecular mechanisms of learning, memory and excitotoxicity. NMDA receptors are highly permeable to calcium, which can lead to the activation of the calcium-dependent protease, calpain. In the present study, the ability of calpain to modulate NMDA receptor function through direct proteolytic digestion of the individual NMDA receptor subunits was examined. HEK293t cells were cotransfected with the NR1a/2A, NR1a/2B or NR1a/2C receptor combinations. Cellular homogenates of these receptor combinations were prepared and digested by purified calpain I in vitro. All three NR2 subunits could be proteolyzed by calpain I while no actin or NR1a cleavage was observed. Based on immunoblot analysis, calpain cleavage of NR2A, NR2B and NR2C subunits was limited to their C-terminal region. In vitro calpain digestion of fusion protein constructs containing the C-terminal region of NR2A yielded two cleavage sites at amino acids 1279 and 1330. Although it has been suggested that calpain cleavage of the NMDA receptor may act as a negative feedback mechanism, the current findings demonstrated that calpain cleavage did not alter [(125)I]MK801 binding and that receptors truncated to the identified cleavage sites had peak intracellular calcium levels, (45)Ca uptake rates and basal electrophysiological properties similar to wild type.
Collapse
Affiliation(s)
- R P Guttmann
- Department of Pharmacology, University of Pennsylvania, School of Medicine and Children's Hospital of Philadelphia, Philadelphia, USA
| | | | | | | | | | | |
Collapse
|
41
|
Docherty NM, Rhinewine JP, Nienow TM, Cohen AS. Affective reactivity of language symptoms, startle responding, and inhibition in schizophrenia. J Abnorm Psychol 2001. [PMID: 11261395 DOI: 10.1037//0021-843x.110.1.194] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The speech of some schizophrenia patients becomes markedly more disordered when negative affect is aroused. The authors tested associations between affective reactivity of speech and responsiveness and inhibition on an acoustic startle task in a sample of 27 outpatients. Patients whose language was reactive to negative affect showed significantly higher initial startle amplitudes than those whose language was not reactive. However, they also showed greater habituation to repeated startle stimuli over trials, even after differences in initial amplitudes were controlled statistically. These findings suggest that affective reactivity of speech is associated with higher initial startle responsiveness but also with greater habituation and, conversely, that patients who are relatively nonreactive to excitatory affective and sensory stimuli are also less reactive to inhibitory input.
Collapse
Affiliation(s)
- N M Docherty
- Department of Psychology, Kent State University, Kent, Ohio 44242, USA.
| | | | | | | |
Collapse
|
42
|
Lin DD, Cohen AS, Coulter DA. Zinc-induced augmentation of excitatory synaptic currents and glutamate receptor responses in hippocampal CA3 neurons. J Neurophysiol 2001; 85:1185-96. [PMID: 11247988 DOI: 10.1152/jn.2001.85.3.1185] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Zinc is found throughout the CNS at synapses co-localized with glutamate in presynaptic terminals. In particular, dentate granule cells' (DGC) mossy fiber (MF) axons contain especially high concentrations of zinc co-localized with glutamate within vesicles. To study possible physiological roles of zinc, visualized slice-patch techniques were used to voltage-clamp rat CA3 pyramidal neurons, and miniature excitatory postsynaptic currents (mEPSCs) were isolated. Bath-applied zinc (200 microM) enhanced median mEPSC peak amplitudes to 153.0% of controls, without affecting mEPSC kinetics. To characterize this augmentation further, rapid agonist application was performed on perisomatic outside-out patches to coapply zinc with glutamate extremely rapidly for brief (1 ms) durations, thereby emulating release kinetics of these substances at excitatory synapses. When zinc was coapplied with glutamate, zinc augmented peak glutamate currents (mean +/- SE, 116.6 +/- 2.8% and 143.8 +/- 9.8% of controls at 50 and 200 microM zinc, respectively). This zinc-induced potentiation was concentration dependent, and pharmacological isolation of alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor-mediated currents (AMPAR currents) gave results similar to those observed with glutamate application (mean, 115.0 +/- 5.4% and 132.5 +/- 9.1% of controls at 50 and 200 microM zinc, respectively). Inclusion of the AMPAR desensitization blocker cyclothiazide in the control solution, however, abolished zinc-induced augmentation of glutamate-evoked currents, suggesting that zinc may potentiate AMPAR currents by inhibiting AMPAR desensitization. Based on the results of the present study, we hypothesize that zinc is a powerful modulator of both excitatory synaptic transmission and glutamate-evoked currents at physiologically relevant concentrations. This modulatory role played by zinc may be a significant factor in enhancing excitatory neurotransmission and could significantly regulate function at the mossy fiber-CA3 synapse.
Collapse
Affiliation(s)
- D D Lin
- Department of Pharmacology and Toxicology, Medical College of Virginia, Virginia Commonwealth University, Richmond, Virginia 23298-0599, USA
| | | | | |
Collapse
|
43
|
Docherty NM, Rhinewine JP, Nienow TM, Cohen AS. Affective reactivity of language symptoms, startle responding, and inhibition in schizophrenia. J Abnorm Psychol 2001; 110:194-8. [PMID: 11261395 DOI: 10.1037/0021-843x.110.1.194] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The speech of some schizophrenia patients becomes markedly more disordered when negative affect is aroused. The authors tested associations between affective reactivity of speech and responsiveness and inhibition on an acoustic startle task in a sample of 27 outpatients. Patients whose language was reactive to negative affect showed significantly higher initial startle amplitudes than those whose language was not reactive. However, they also showed greater habituation to repeated startle stimuli over trials, even after differences in initial amplitudes were controlled statistically. These findings suggest that affective reactivity of speech is associated with higher initial startle responsiveness but also with greater habituation and, conversely, that patients who are relatively nonreactive to excitatory affective and sensory stimuli are also less reactive to inhibitory input.
Collapse
Affiliation(s)
- N M Docherty
- Department of Psychology, Kent State University, Kent, Ohio 44242, USA.
| | | | | | | |
Collapse
|
44
|
Abstract
In the CNS, inhibitory synaptic function undergoes profound transformation during early postnatal development. This is due to variations in the subunit composition of subsynaptic GABA(A) receptors (GABA(A)Rs) at differing developmental stages as well as other factors. These include changes in the driving force for chloride-mediated conductances as well as the quantity and/or cleft lifetime of released neurotransmitter. The present study was undertaken to investigate the nature and time course of developmental maturation of GABAergic synaptic function in hippocampal CA1 pyramidal neurons. In neonatal [postnatal day (P) 1-7] and immature (P8-14) CA1 neurons, miniature inhibitory postsynaptic currents (mIPSCs) were significantly larger, were less frequent, and had slower kinetics compared with mIPSCs recorded in more mature neurons. Adult mIPSC kinetics were achieved by the third postnatal week in CA1 neurons. However, despite this apparent maturation of mIPSC kinetics, significant differences in modulation of mIPSCs by allosteric agonists in adolescent (P15-21) neurons were still evident. Diazepam (1-300 nM) and zolpidem (200 nM) increased the amplitude of mIPSCs in adolescent but not adult neurons. Both drugs increased mIPSC decay times equally at both ages. These differential agonist effects on mIPSC amplitude suggest that in adolescent CA1 neurons, inhibitory synapses operate differently than adult synapses and function as if subsynaptic receptors are not fully occupied by quantal release of GABA. Rapid agonist application experiments on perisomatic patches pulled from adolescent neurons provided additional support for this hypothesis. In GABA(A)R currents recorded in these patches, benzodiazepine amplitude augmentation effects were evident only when nonsaturating GABA concentrations were applied. Furthermore nonstationary noise analysis of mIPSCs in P15-21 neurons revealed that zolpidem-induced mIPSC augmentation was not due to an increase in single-channel conductance of subsynaptic GABA(A)Rs but rather to an increase in the number of open channels responding to a single GABA quantum, further supporting the hypothesis that synaptic receptors may not be saturated during synaptic function in adolescent neurons. These data demonstrate that inhibitory synaptic transmission undergoes a markedly protracted postnatal maturation in rat CA1 pyramidal neurons. In the first two postnatal weeks, mIPSCs are large in amplitude, are slow, and occur infrequently. By the third postnatal week, mIPSCs have matured kinetically but retain distinct responses to modulatory drugs, possibly reflecting continued immaturity in synaptic structure and function persisting through adolescence.
Collapse
Affiliation(s)
- A S Cohen
- Pediatric Regional Epilepsy Program and Joseph Stokes Research Institute of the Children's Hospital of Philadelphia, Division of Neurology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA.
| | | | | |
Collapse
|
45
|
Abstract
BACKGROUND More than 75 instruments have been developed to measure functional status. These measures differ in number of items, type of rating scale, and item difficulty. Such variations render it impossible to compare data across different measures. One way to overcome such test dependency is test equating, which relates scores from different measures to a common metric. OBJECTIVE We developed a bank of physical functioning items and equated them using item response theory. DESIGN We used a common-item equating design and a self-administered survey of functional status. SUBJECTS Individuals > or = 65 years of age who had > or = 1 ambulatory visit across a 3-month sampling frame to a Veterans Administration Medical Center or its affiliated university medical center. RESULTS The dressing items were the most discriminating, followed by bathing, toileting, mobility, cooking/eating, and household and community activities. The 5 most discriminating items were to put underclothes on, manage clothes after toileting, move between rooms, take pants/slacks off, and get into bed. Most of the items were located on the easier end of the ability continuum. Only 6 would classify as being very difficult. CONCLUSIONS We used item response theory to equate and calibrate a large number of activities of daily living on the same scale; by doing so, we were able to better understand the structure and order of domain-specific items to each other, as well as the interrelations among items across the ability continuum.
Collapse
Affiliation(s)
- C A McHorney
- Department of Health Services, University of Kentucky, The Center for Health Services Management and Research, University of Kentucky Medical Center, and Lexington VAMC, USA
| | | |
Collapse
|
46
|
Abstract
The solutions of linear polymers traditionally used for DNA separation have been employed for the capillary electrophoresis (CE) of diastereomers of chemically modified DNA. The selectivity of diastereomeric separation of the phosphorothioate (PS) and 2'-O-methylated (2-OMe) PS oligonucleotides depends on the nature of the polymer additive in the CE background electrolyte. The selectivity of separation for different polymers increases in the line: linear polyacrylamide < polyethylene glycol < polyvinyl pyrrolidone. The separation of oligomer diastereomers was shown to be primarily based on the hydrophobic interaction with the polymer network that acts as a pseudostationary phase. While lowering the temperature resulted in improved separation, the addition of organic modifiers such as formamide, methanol or acetonitrile counteracts the solute adsorption on the polymer network, and decreases the selectivity of DNA diastereoseparation. The effect of molecular mass and concentration of the polymer on the separation selectivity was investigated.
Collapse
|
47
|
Abstract
Rudolph Virchow, in 1854, introduced and popularized the term amyloid to denote a macroscopic tissue abnormality that exhibited a positive iodine staining reaction. Subsequent light microscopic studies with polarizing optics demonstrated the inherent birefringence of amyloid deposits, a property that increased intensely after staining with Congo red dye. In 1959, electron microscopic examination of ultrathin sections of amyloidotic tissues revealed the presence of fibrils, indeterminate in length and, invariably, 80 to 100 A in width. Using the criteria of Congophilia and fibrillar morphology, 20 or more biochemically distinct forms of amyloid have been identified throughout the animal kingdom; each is specifically associated with a unique clinical syndrome. Fibrils, also 80 to 100 A in width, have been isolated from tissue homogenates using differential sedimentation or solubility. X-ray diffraction analysis revealed the fibrils to be ordered in the beta pleated sheet conformation, with the direction of the polypeptide backbone perpendicular to the fibril axis (cross beta structure). Because of the similar dimensions and tinctorial properties of the fibrils extracted from amyloid-laden tissues and amyloid fibrils in tissue sections, they have been assumed to be identical. However, the spatial relationship of proteoglycans and amyloid P component (AP), common to all forms of amyloid, to the putative protein only fibrils in tissues, has been unclear. Recently, it has been suggested that, in situ, amyloid fibrils are composed of proteoglycans and AP as well as amyloid proteins and thus resemble connective tissue microfibrils. Chemical and physical definition of the fibrils in tissues will be needed to relate the in vitro properties of amyloid protein fibrils to the pathogenesis of amyloid fibril formation in vivo.
Collapse
Affiliation(s)
- J D Sipe
- Center for Scientific Review, National Institutes of Health, Maryland, Bethesda, 20892, USA.
| | | |
Collapse
|
48
|
Cohen AS, Coussens CM, Raymond CR, Abraham WC. Long-lasting increase in cellular excitability associated with the priming of LTP induction in rat hippocampus. J Neurophysiol 1999; 82:3139-48. [PMID: 10601447 DOI: 10.1152/jn.1999.82.6.3139] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The mechanisms underlying the facilitation (priming) of long-term potentiation (LTP) by prior activation of metabotropic glutamate receptors (mGluRs) were investigated in area CA1 of rat hippocampal slices. In particular, we focused on whether a long-lasting increase in postsynaptic excitability could account for the facilitated LTP. Administration of the mGluR agonist 1S, 3R-aminocyclopentanedicarboxylic acid (ACPD) produced rapid decreases in the amplitude of both the slow spike afterhyperpolarization (AHP(slow)) and spike frequency adaptation recorded intracellularly from CA1 pyramidal cells. These changes persisted after drug washout, showing only a slow decay over 20 min. ACPD also caused a leftward shift of the field EPSP-population spike relation and an overall increase in population spike amplitude, but this effect was not as persistent as the intracellularly measured alterations in cell excitability. ACPD-treated cells showed increased spike discharges during LTP-inducing tetanic stimulation, and the amplitude of the AHP(slow) was negatively correlated with the degree of initial LTP induction. The beta-adrenergic agonist isoproterenol also caused excitability changes as recorded intracellularly, whereas in extracellular experiments it weakly primed the induction but not the persistence of LTP. ACPD primed both LTP measures. Isoproterenol administration during the tetanus occluded the priming effect of ACPD on initial LTP induction but not its effect on LTP persistence. We conclude that the persistent excitability changes elicited by ACPD contributes to the priming of LTP induction but that other ACPD-triggered mechanisms must account for the facilitated persistence of LTP in the priming paradigm.
Collapse
Affiliation(s)
- A S Cohen
- Department of Psychology and the Neuroscience Research Centre, University of Otago, Dunedin, New Zealand
| | | | | | | |
Collapse
|
49
|
Swanson-Park JL, Coussens CM, Mason-Parker SE, Raymond CR, Hargreaves EL, Dragunow M, Cohen AS, Abraham WC. A double dissociation within the hippocampus of dopamine D1/D5 receptor and beta-adrenergic receptor contributions to the persistence of long-term potentiation. Neuroscience 1999; 92:485-97. [PMID: 10408599 DOI: 10.1016/s0306-4522(99)00010-x] [Citation(s) in RCA: 138] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We compared the effects of the D1/D5 receptor antagonist SCH-23390 with the beta-adrenergic receptor antagonist propranolol on the persistence of long-term potentiation in the CA1 and dentate gyrus subregions of the hippocampus. In slices, SCH-23390 but not propranolol reduced the persistence of long-term potentiation in area CA1 without affecting its induction. The drugs exerted reverse effects in the dentate gyrus, although in this case the induction of long-term potentiation was also affected by propranolol. The lack of effect of SCH-23390 on the induction and maintenance of long-term potentiation in the dentate gyrus was confirmed in awake animals. The drug also had little or no effect on the expression of inducible transcription factors. In area CA1 of awake animals, SCH-23390 blocked persistence of long-term potentiation beyond 3 h, confirming the results in slices. To rule out a differential release of catecholamines induced by our stimulation protocols between brain areas, we compared the effects of the D1/D5 agonist SKF-38393 with the beta-adrenergic agonist isoproterenol on the persistence of a weakly induced, decremental long-term potentiation in CA1 slices. SKF-38393 but not isoproterenol promoted greater persistence of long-term potentiation over a 2-h period. In contrast, isoproterenol but not SKF-38392 facilitated the induction of long-term potentiation. These data demonstrate that there is a double dissociation of the catecholamine modulation of long-term potentiation between CA1 and the dentate gyrus, suggesting that long-term potentiation in these brain areas may be differentially consolidated according to the animal's behavioural state.
Collapse
Affiliation(s)
- J L Swanson-Park
- Department of Psychology and the Neuroscience Research Centre, University of Otago, Dunedin, New Zealand
| | | | | | | | | | | | | | | |
Collapse
|
50
|
Westermark P, Araki S, Benson MD, Cohen AS, Frangione B, Masters CL, Saraiva MJ, Sipe JD, Husby G, Kyle RA, Selkoe D. Nomenclature of amyloid fibril proteins. Report from the meeting of the International Nomenclature Committee on Amyloidosis, August 8-9, 1998. Part 1. Amyloid 1999; 6:63-6. [PMID: 10211413 DOI: 10.3109/13506129908993290] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|