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Hage S, Kinkade S, Girard R, Flemming KD, Kim H, Torbey MT, Huang J, Huston J, Shu Y, Selwyn RG, Hart BL, Mabray MC, Feghali J, Sair HI, Narvid J, Lupo JM, Lee J, Stadnik A, Alcazar-Felix RJ, Shenkar R, Hobson N, DeBiasse D, Lane K, McBee NA, Treine K, Ostapkovich N, Wang Y, Thompson RE, Koenig JI, Carroll T, Hanley DF, Awad IA. Trial Readiness of Cavernous Malformations With Symptomatic Hemorrhage, Part II: Biomarkers and Trial Modeling. Stroke 2024; 55:31-39. [PMID: 38134265 PMCID: PMC10752356 DOI: 10.1161/strokeaha.123.044083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 10/12/2023] [Indexed: 12/24/2023]
Abstract
BACKGROUND Quantitative susceptibility mapping (QSM) and dynamic contrast-enhanced quantitative perfusion (DCEQP) magnetic resonance imaging sequences assessing iron deposition and vascular permeability were previously correlated with new hemorrhage in cerebral cavernous malformations. We assessed their prospective changes in a multisite trial-readiness project. METHODS Patients with cavernous malformation and symptomatic hemorrhage (SH) in the prior year, without prior or planned lesion resection or irradiation were enrolled. Mean QSM and DCEQP of the SH lesion were acquired at baseline and at 1- and 2-year follow-ups. Sensitivity and specificity of biomarker changes were analyzed in relation to predefined criteria for recurrent SH or asymptomatic change. Sample size calculations for hypothesized therapeutic effects were conducted. RESULTS We logged 143 QSM and 130 DCEQP paired annual assessments. Annual QSM change was greater in cases with SH than in cases without SH (P=0.019). Annual QSM increase by ≥6% occurred in 7 of 7 cases (100%) with recurrent SH and in 7 of 10 cases (70%) with asymptomatic change during the same epoch and 3.82× more frequently than clinical events. DCEQP change had lower sensitivity for SH and asymptomatic change than QSM change and greater variance. A trial with the smallest sample size would detect a 30% difference in QSM annual change during 2 years of follow-up in 34 or 42 subjects (1 and 2 tailed, respectively); power, 0.8, α=0.05. CONCLUSIONS Assessment of QSM change is feasible and sensitive to recurrent bleeding in cavernous malformations. Evaluation of an intervention on QSM percent change may be used as a time-averaged difference between 2 arms using a repeated measures analysis. DCEQP change is associated with lesser sensitivity and higher variability than QSM. These results are the basis of an application for certification by the US Food and Drug Administration of QSM as a biomarker of drug effect on bleeding in cavernous malformations. REGISTRATION URL: https://www.clinicaltrials.gov; Unique identifier: NCT03652181.
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Affiliation(s)
- Stephanie Hage
- Neurovascular Surgery Program, Department of Neurological Surgery (S.H., S.K., R.G., J.L., A.S., R.J.A.-F., R.S., N.H., D.D., I.A.A.), University of Chicago Medicine and Biological Sciences, IL
| | - Serena Kinkade
- Neurovascular Surgery Program, Department of Neurological Surgery (S.H., S.K., R.G., J.L., A.S., R.J.A.-F., R.S., N.H., D.D., I.A.A.), University of Chicago Medicine and Biological Sciences, IL
| | - Romuald Girard
- Neurovascular Surgery Program, Department of Neurological Surgery (S.H., S.K., R.G., J.L., A.S., R.J.A.-F., R.S., N.H., D.D., I.A.A.), University of Chicago Medicine and Biological Sciences, IL
| | | | - Helen Kim
- Department of Anesthesiology and Perioperative Care, Center for Cerebrovascular Research (H.K.), University of California, San Francisco
| | - Michel T Torbey
- Department of Neurology (M.T.T.), University of New Mexico, Albuquerque
| | | | - John Huston
- Radiology (J. Huston, Y.S.), Mayo Clinic, Rochester, MN
| | - Yunhong Shu
- Radiology (J. Huston, Y.S.), Mayo Clinic, Rochester, MN
| | - Reed G Selwyn
- Department of Diagnostic Radiology (R.G.S., B.L.H.), University of New Mexico, Albuquerque
| | - Blaine L Hart
- Department of Diagnostic Radiology (R.G.S., B.L.H.), University of New Mexico, Albuquerque
| | - Marc C Mabray
- Department of Radiology (M.C.M.), University of New Mexico, Albuquerque
| | | | - Haris I Sair
- The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins School of Medicine, Baltimore, MD (H.I.S.)
| | - Jared Narvid
- Department of Radiology and Biomedical Imaging (J.N., J.M.L.), University of California, San Francisco
| | - Janine M Lupo
- Department of Radiology and Biomedical Imaging (J.N., J.M.L.), University of California, San Francisco
| | - Justine Lee
- Neurovascular Surgery Program, Department of Neurological Surgery (S.H., S.K., R.G., J.L., A.S., R.J.A.-F., R.S., N.H., D.D., I.A.A.), University of Chicago Medicine and Biological Sciences, IL
| | - Agnieszka Stadnik
- Neurovascular Surgery Program, Department of Neurological Surgery (S.H., S.K., R.G., J.L., A.S., R.J.A.-F., R.S., N.H., D.D., I.A.A.), University of Chicago Medicine and Biological Sciences, IL
| | - Roberto J Alcazar-Felix
- Neurovascular Surgery Program, Department of Neurological Surgery (S.H., S.K., R.G., J.L., A.S., R.J.A.-F., R.S., N.H., D.D., I.A.A.), University of Chicago Medicine and Biological Sciences, IL
| | - Robert Shenkar
- Neurovascular Surgery Program, Department of Neurological Surgery (S.H., S.K., R.G., J.L., A.S., R.J.A.-F., R.S., N.H., D.D., I.A.A.), University of Chicago Medicine and Biological Sciences, IL
| | - Nicholas Hobson
- Neurovascular Surgery Program, Department of Neurological Surgery (S.H., S.K., R.G., J.L., A.S., R.J.A.-F., R.S., N.H., D.D., I.A.A.), University of Chicago Medicine and Biological Sciences, IL
| | - Dorothy DeBiasse
- Neurovascular Surgery Program, Department of Neurological Surgery (S.H., S.K., R.G., J.L., A.S., R.J.A.-F., R.S., N.H., D.D., I.A.A.), University of Chicago Medicine and Biological Sciences, IL
| | - Karen Lane
- Brain Injury Outcomes Unit, Department of Neurology (K.L., N.A.M., K.T., N.O., Y.W., R.E.T., D.F.H.), Johns Hopkins University Medical Institutions, Baltimore, MD
| | - Nichole A McBee
- Brain Injury Outcomes Unit, Department of Neurology (K.L., N.A.M., K.T., N.O., Y.W., R.E.T., D.F.H.), Johns Hopkins University Medical Institutions, Baltimore, MD
| | - Kevin Treine
- Brain Injury Outcomes Unit, Department of Neurology (K.L., N.A.M., K.T., N.O., Y.W., R.E.T., D.F.H.), Johns Hopkins University Medical Institutions, Baltimore, MD
| | - Noeleen Ostapkovich
- Brain Injury Outcomes Unit, Department of Neurology (K.L., N.A.M., K.T., N.O., Y.W., R.E.T., D.F.H.), Johns Hopkins University Medical Institutions, Baltimore, MD
| | - Ying Wang
- Brain Injury Outcomes Unit, Department of Neurology (K.L., N.A.M., K.T., N.O., Y.W., R.E.T., D.F.H.), Johns Hopkins University Medical Institutions, Baltimore, MD
| | - Richard E Thompson
- Brain Injury Outcomes Unit, Department of Neurology (K.L., N.A.M., K.T., N.O., Y.W., R.E.T., D.F.H.), Johns Hopkins University Medical Institutions, Baltimore, MD
| | - James I Koenig
- National Institute of Neurological Disorders and Stroke, Bethesda, MD (J.K.)
| | - Timothy Carroll
- Department of Diagnostic Radiology (T.C.), University of Chicago Medicine and Biological Sciences, IL
| | - Daniel F Hanley
- Brain Injury Outcomes Unit, Department of Neurology (K.L., N.A.M., K.T., N.O., Y.W., R.E.T., D.F.H.), Johns Hopkins University Medical Institutions, Baltimore, MD
| | - Issam A Awad
- Neurovascular Surgery Program, Department of Neurological Surgery (S.H., S.K., R.G., J.L., A.S., R.J.A.-F., R.S., N.H., D.D., I.A.A.), University of Chicago Medicine and Biological Sciences, IL
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Hage S, Kinkade S, Girard R, Flemming KD, Kim H, Torbey MT, Huang J, Huston J, Shu Y, Selwyn RG, Hart BL, Mabray MC, Feghali J, Sair HI, Narvid J, Lupo JM, Lee J, Stadnik A, Alcazar R, Shenkar R, Hobson N, DeBiasse D, Lane K, McBee N, Treine K, Ostapkovich N, Wang Y, Thompson RE, Mendoza-Puccini C, Koenig J, Carroll T, Hanley DF, Awad IA. Cavernous Angioma Symptomatic Hemorrhage (CASH) Trial Readiness II: Imaging Biomarkers and Trial Modeling. medRxiv 2023:2023.06.01.23290854. [PMID: 37333396 PMCID: PMC10275015 DOI: 10.1101/2023.06.01.23290854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
Background Quantitative susceptibility mapping (QSM) and dynamic contrast enhanced quantitative perfusion (DCEQP) MRI sequences assessing iron deposition and vascular permeability were previously correlated with new hemorrhage in cavernous angiomas. We assessed their prospective changes in cavernous angiomas with symptomatic hemorrhage (CASH) in a multisite trial readiness project ( clinicaltrials.gov NCT03652181 ). Methods Patients with CASH in the prior year, without prior or planned lesion resection or irradiation were enrolled. Mean QSM and DCEQP of CASH lesion were acquired at baseline, and at 1- and 2-year follow-ups. Sensitivity and specificity of biomarker changes were analyzed in relation to predefined lesional symptomatic hemorrhage (SH) or asymptomatic change (AC). Sample size calculations for hypothesized therapeutic effects were conducted. Results We logged 143 QSM and 130 DCEQP paired annual assessments. Annual QSM change was greater in cases with SH than in cases without SH (p= 0.019). Annual QSM increase by ≥ 6% occurred in 7 of 7 cases (100%) with recurrent SH and in 7 of 10 cases (70%) with AC during the same epoch, and 3.82 times more frequently than clinical events. DCEQP change had lower sensitivity for SH and AC than QSM change, and greater variance. A trial with smallest sample size would detect a 30% difference in QSM annual change in 34 or 42 subjects (one and two-tailed, respectively), power 0.8, alpha 0.05. Conclusions Assessment of QSM change is feasible and sensitive to recurrent bleeding in CASH. Evaluation of an intervention on QSM percent change may be used as a time-averaged difference between 2 arms using a repeated measures analysis. DCEQP change is associated with lesser sensitivity and higher variability than QSM. These results are the basis of an application for certification by the U.S. F.D.A. of QSM as a biomarker of drug effect in CASH.
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Bowley TY, Lagutina IV, Francis C, Sivakumar S, Selwyn RG, Taylor E, Guo Y, Fahy BN, Tawfik B, Marchetti D. The RPL/RPS gene signature of melanoma CTCs associates with brain metastasis. Cancer Res Commun 2022; 2:1436-1448. [PMID: 36407834 PMCID: PMC9668078 DOI: 10.1158/2767-9764.crc-22-0337] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Melanoma brain metastasis (MBM) is linked to poor prognosis and low overall survival. We hypothesized that melanoma circulating tumor cells (CTCs) possess a gene signature significantly expressed and associated with MBM. Employing a multi-pronged approach, we provide first-time evidence identifying a common CTC gene signature for ribosomal protein large/small subunits (RPL/RPS) which associate with MBM onset and progression. Experimental strategies involved capturing, transcriptional profiling and interrogating CTCs, either directly isolated from blood of melanoma patients at distinct stages of MBM progression or from CTC-driven MBM in experimental animals. Second, we developed the first Magnetic Resonance Imaging (MRI) CTC-derived MBM xenograft model (MRI-MBM CDX) to discriminate MBM spatial and temporal growth, recreating MBM clinical presentation and progression. Third, we performed the comprehensive transcriptional profiling of MRI-MBM CDXs, along with longitudinal monitoring of CTCs from CDXs possessing/not possessing MBM. Our findings suggest that enhanced ribosomal protein content/ribogenesis may contribute to MBM onset. Since ribosome modifications drive tumor progression and metastatic development by remodeling CTC translational events, overexpression of the CTC RPL/RPS gene signature could be implicated in MBM development. Collectively, this study provides important insights for relevance of the CTC RPL/RPS gene signature in MBM, and identify potential targets for therapeutic intervention to improve patient care for melanoma patients diagnosed with or at high-risk of developing MBM.
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Affiliation(s)
- Tetiana Y. Bowley
- Division of Molecular Medicine, Department of Internal Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico
| | - Irina V. Lagutina
- Animal Models Shared Resource, The University of New Mexico Comprehensive Cancer Center, Albuquerque, New Mexico
| | - Carol Francis
- Division of Molecular Medicine, Department of Internal Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico
| | - Sinduja Sivakumar
- Division of Molecular Medicine, Department of Internal Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico
| | - Reed G. Selwyn
- Department of Radiology, University of New Mexico Health Sciences Center, Albuquerque, New Mexico
| | - Erik Taylor
- Department of Radiology, University of New Mexico Health Sciences Center, Albuquerque, New Mexico
| | - Yan Guo
- Division of Molecular Medicine, Department of Internal Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico
| | - Bridget N. Fahy
- Division of Surgical Oncology and Palliative Medicine, University of New Mexico Comprehensive Cancer Center, Albuquerque, New Mexico
| | - Bernard Tawfik
- Division of Hematology and Oncology, Department of Internal Medicine, University of New Mexico Comprehensive Cancer Center, Albuquerque, New Mexico
| | - Dario Marchetti
- Division of Molecular Medicine, Department of Internal Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico
- Corresponding Author: Dario Marchetti, University of New Mexico Health Sciences Center, CRF, 915 Camino de Salud, Albuquerque, NM, 87131. Phone: 505-272-7937; E-mail:
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Russ E, Davis CM, Slaven JE, Bradfield DT, Selwyn RG, Day RM. Comparison of the Medical Uses and Cellular Effects of High and Low Linear Energy Transfer Radiation. Toxics 2022; 10:toxics10100628. [PMID: 36287908 PMCID: PMC9609561 DOI: 10.3390/toxics10100628] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 10/13/2022] [Accepted: 10/14/2022] [Indexed: 05/14/2023]
Abstract
Exposure to ionizing radiation can occur during medical treatments, from naturally occurring sources in the environment, or as the result of a nuclear accident or thermonuclear war. The severity of cellular damage from ionizing radiation exposure is dependent upon a number of factors including the absorbed radiation dose of the exposure (energy absorbed per unit mass of the exposure), dose rate, area and volume of tissue exposed, type of radiation (e.g., X-rays, high-energy gamma rays, protons, or neutrons) and linear energy transfer. While the dose, the dose rate, and dose distribution in tissue are aspects of a radiation exposure that can be varied experimentally or in medical treatments, the LET and eV are inherent characteristics of the type of radiation. High-LET radiation deposits a higher concentration of energy in a shorter distance when traversing tissue compared with low-LET radiation. The different biological effects of high and low LET with similar energies have been documented in vivo in animal models and in cultured cells. High-LET results in intense macromolecular damage and more cell death. Findings indicate that while both low- and high-LET radiation activate non-homologous end-joining DNA repair activity, efficient repair of high-LET radiation requires the homologous recombination repair pathway. Low- and high-LET radiation activate p53 transcription factor activity in most cells, but high LET activates NF-kB transcription factor at lower radiation doses than low-LET radiation. Here we review the development, uses, and current understanding of the cellular effects of low- and high-LET radiation exposure.
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Affiliation(s)
- Eric Russ
- Graduate Program of Cellular and Molecular Biology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Catherine M. Davis
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - John E. Slaven
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Dmitry T. Bradfield
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Reed G. Selwyn
- Department of Radiology, University of New Mexico, Albuquerque, NM 87131, USA
| | - Regina M. Day
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
- Correspondence:
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Taylor EN, Wilson CM, Franco S, De May H, Medina LY, Yang Y, Flores EB, Bartee E, Selwyn RG, Serda RE. Monitoring Therapeutic Responses to Silicified Cancer Cell Immunotherapy Using PET/MRI in a Mouse Model of Disseminated Ovarian Cancer. Int J Mol Sci 2022; 23:ijms231810525. [PMID: 36142437 PMCID: PMC9504323 DOI: 10.3390/ijms231810525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/31/2022] [Accepted: 09/05/2022] [Indexed: 11/16/2022] Open
Abstract
Current imaging approaches used to monitor tumor progression can lack the ability to distinguish true progression from pseudoprogression. Simultaneous metabolic 2-deoxy-2-[18F]fluoro-D-glucose ([18F]FDG) positron emission tomography (PET) and magnetic resonance imaging (MRI) offers new opportunities to overcome this challenge by refining tumor identification and monitoring therapeutic responses to cancer immunotherapy. In the current work, spatial and quantitative analysis of tumor burden were performed using simultaneous [18F]FDG-PET/MRI to monitor therapeutic responses to a novel silicified cancer cell immunotherapy in a mouse model of disseminated serous epithelial ovarian cancer. Tumor progression was validated by bioluminescence imaging of luciferase expressing tumor cells, flow cytometric analysis of immune cells in the tumor microenvironment, and histopathology. While PET demonstrated the presence of metabolically active cancer cells through [18F]FDG uptake, MRI confirmed cancer-related accumulation of ascites and tissue anatomy. This approach provides complementary information on disease status without a confounding signal from treatment-induced inflammation. This work provides a possible roadmap to facilitate accurate monitoring of therapeutic responses to cancer immunotherapies.
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Affiliation(s)
- Erik N. Taylor
- Department of Radiology, University of New Mexico Health Science Center, Albuquerque, NM 87131, USA
| | - Colin M. Wilson
- Department of Radiology, University of New Mexico Health Science Center, Albuquerque, NM 87131, USA
| | - Stefan Franco
- Internal Medicine, University of New Mexico Health Science Center, Albuquerque, NM 87131, USA
| | - Henning De May
- Department of Obstetrics & Gynecology, University of New Mexico Health Science Center, Albuquerque, NM 87131, USA
| | - Lorél Y. Medina
- Internal Medicine, University of New Mexico Health Science Center, Albuquerque, NM 87131, USA
| | - Yirong Yang
- Pharmaceutical Sciences, University of New Mexico Health Science Center, Albuquerque, NM 87131, USA
| | - Erica B. Flores
- Internal Medicine, University of New Mexico Health Science Center, Albuquerque, NM 87131, USA
| | - Eric Bartee
- Internal Medicine, University of New Mexico Health Science Center, Albuquerque, NM 87131, USA
| | - Reed G. Selwyn
- Department of Radiology, University of New Mexico Health Science Center, Albuquerque, NM 87131, USA
| | - Rita E. Serda
- Internal Medicine, University of New Mexico Health Science Center, Albuquerque, NM 87131, USA
- Correspondence:
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Wilson CM, Selwyn RG, Elojeimy S. Comparison of PET/CT SUV metrics across different clinical software platforms. Clin Imaging 2022; 89:104-108. [DOI: 10.1016/j.clinimag.2022.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 06/02/2022] [Accepted: 06/07/2022] [Indexed: 11/29/2022]
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Manda-Mapalo MT, Fine SG, Safadi S, Lee JH, Du R, Sussman AL, Mishra S, Selwyn RG, Saline JL, Hine WL, Brown-Glaberman UA. Breast Cancer Screening Among Medically Underserved Women in New Mexico: Potential for Lower Recall Rates with Digital Breast Tomosynthesis. J Womens Health (Larchmt) 2020; 29:1596-1601. [PMID: 32991242 DOI: 10.1089/jwh.2020.8402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Introduction: Digital breast tomosynthesis (DBT) may decrease recall rates (RRs) and improve positive predictive values (PPVs) and cancer detection rates (CDRs) versus full-field digital mammography (FFDM). The value of DBT has not been assessed in New Mexico's rural and minority population. Objectives of this study were to compare RRs, CDRs, and PPVs using FFDM+DBT versus FFDM in screening mammograms at the University of New Mexico between 2013 and 2016 and to qualitatively evaluate patient decision-making regarding DBT. Materials and Methods: RRs, CDRs, and PPVs with 95% confidence intervals and relative risk were calculated from 35,147 mammograms. The association between relative risk and mammography approach was tested using Pearson's chi-square test. Twenty women undergoing screening were interviewed for qualitative evaluation of decision-making. Results: From 2013 to 2016, RRs were 8.4% and 11.1% for FFDM+DBT and FFDM, respectively. The difference in RRs became more pronounced with time. No significant difference was observed in PPVs or CDRs. Qualitative interviews revealed that the majority had limited prior knowledge of DBT and relied on provider recommendations. Conclusion: In New Mexico women undergoing screening mammography, a 30% relative risk reduction in RRs was observed with FFDM+DBT. Qualitative interviews suggest that women are aware of and receptive to DBT, assuming adequate educational support. Clinical Trials.gov ID: NCT03979729.
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Affiliation(s)
- Martha T Manda-Mapalo
- Division of Hematology/Oncology, MSC 07-4025, University of New Mexico Comprehensive Cancer Center, Albuquerque, New Mexico, USA
| | - Stephanie G Fine
- Division of Surgical Oncology, University of New Mexico Comprehensive Cancer Center, Albuquerque, New Mexico, USA
| | - Sarah Safadi
- Division of Gastroenterology, Hepatology and Nutrition, University of Louisville, Louisville, Kentucky, USA
| | - Ji-Hyun Lee
- Division of Quantitative Sciences at the UF Health Cancer Center, College of Public Health and Health Professions, College of Medicine, University of Florida, Gainesville, Florida, USA
| | - Ruofei Du
- Department of Internal Medicine, Biostatistics Shared Resource, University of New Mexico Comprehensive Cancer Center, Albuquerque, New Mexico, USA.,Department of Internal Medicine, University of New Mexico, Albuquerque, New Mexico, USA
| | - Andrew L Sussman
- Department of Family and Community Medicine, University of New Mexico Comprehensive Cancer Center, Albuquerque, New Mexico, USA
| | - Shiraz Mishra
- Department of Pediatrics and UNM Comprehensive Cancer Center, University of New Mexico Health Sciences Center, MSC 10 5590, 1 University of New Mexico, Albuquerque, New Mexico, USA
| | - Reed G Selwyn
- Department of Radiology, MSC 10 5530, 1 University of New Mexico, Albuquerque, New Mexico, USA
| | - Jennifer L Saline
- Department of Radiology, MSC 10 5530, 1 University of New Mexico, Albuquerque, New Mexico, USA
| | - Wendy L Hine
- University of New Mexico Hospital, Albuquerque, New Mexico, USA
| | - Ursa A Brown-Glaberman
- Division of Hematology/Oncology, MSC 07-4025, University of New Mexico Comprehensive Cancer Center, Albuquerque, New Mexico, USA
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Brocato TA, Brown-Glaberman U, Wang Z, Selwyn RG, Wilson CM, Wyckoff EF, Lomo LC, Saline JL, Hooda-Nehra A, Pasqualini R, Arap W, Brinker CJ, Cristini V. Predicting breast cancer response to neoadjuvant chemotherapy based on tumor vascular features in needle biopsies. JCI Insight 2019; 5:126518. [PMID: 30835256 DOI: 10.1172/jci.insight.126518] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [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: 11/17/2022] Open
Abstract
In clinical breast cancer intervention, selection of the optimal treatment protocol based on predictive biomarkers remains an elusive goal. Here, we present a modeling tool to predict the likelihood of breast cancer response to neoadjuvant chemotherapy using patient specific tumor vasculature biomarkers. A semi-automated analysis was implemented and performed on 3990 histological images from 48 patients, with 10-208 images analyzed for each patient. We applied a histology-based model to resected primary breast cancer tumors (n = 30), and then evaluated a cohort of patients (n = 18) undergoing neoadjuvant chemotherapy, collecting pre- and post-treatment pathology specimens and MRI data. We found that core biopsy samples can be used with acceptable accuracy (r = 0.76) to determine histological parameters representative of the whole tissue region. Analysis of model histology parameters obtained from tumor vasculature measurements, specifically diffusion distance divided by radius of drug source (L/rb) and blood volume fraction (BVF), provides a statistically significant separation of patients obtaining a pathologic complete response (pCR) from those that do not (Student's t-test; P < 0.05). With this model, it is feasible to evaluate primary breast tumor vasculature biomarkers in a patient specific manner, thereby allowing a precision approach to breast cancer treatment.
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Affiliation(s)
- Terisse A Brocato
- Department of Chemical and Biological Engineering and Center for Biomedical Engineering, University of New Mexico, Albuquerque, New Mexico, USA
| | - Ursa Brown-Glaberman
- University of New Mexico Comprehensive Cancer Center, Albuquerque, New Mexico, USA
| | - Zhihui Wang
- Mathematics in Medicine Program, Houston Methodist Research Institute, Houston, Texas, USA.,Department of Imaging Physics, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Reed G Selwyn
- Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA.,Department of Radiology, University of New Mexico, Albuquerque, New Mexico, USA
| | - Colin M Wilson
- Department of Radiology, University of New Mexico, Albuquerque, New Mexico, USA
| | - Edward F Wyckoff
- Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, New Mexico, USA
| | - Lesley C Lomo
- Department of Pathology, University of Utah, Salt Lake City, Utah, USA
| | - Jennifer L Saline
- Department of Radiology, University of New Mexico, Albuquerque, New Mexico, USA
| | - Anupama Hooda-Nehra
- Rutgers Cancer Institute of New Jersey, Newark, New Jersey, USA.,Division of Hematology/Oncology, Department of Medicine, Rutgers New Jersey Medical School, Newark, New Jersey, USA
| | - Renata Pasqualini
- Rutgers Cancer Institute of New Jersey, Newark, New Jersey, USA.,Division of Cancer Biology, Department of Radiation Oncology, Rutgers New Jersey Medical School, Newark, New Jersey, USA
| | - Wadih Arap
- Rutgers Cancer Institute of New Jersey, Newark, New Jersey, USA.,Division of Hematology/Oncology, Department of Medicine, Rutgers New Jersey Medical School, Newark, New Jersey, USA
| | - C Jeffrey Brinker
- Department of Chemical and Biological Engineering and Center for Biomedical Engineering, University of New Mexico, Albuquerque, New Mexico, USA.,Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, New Mexico, USA.,Department of Molecular Genetics and Microbiology, University of New Mexico Health Sciences Center, Albuquerque, New Mexico, USA.,Self-Assembled Materials Department, Sandia National Laboratories, Albuquerque, New Mexico, USA
| | - Vittorio Cristini
- Mathematics in Medicine Program, Houston Methodist Research Institute, Houston, Texas, USA.,Department of Imaging Physics, University of Texas MD Anderson Cancer Center, Houston, Texas, USA.,Department of Nanomedicine, Methodist Hospital Research Institute, Houston, Texas, USA
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Park TY, Nishida KS, Wilson CM, Jaiswal S, Scott J, Hoy AR, Selwyn RG, Dardzinski BJ, Choi KH. Effects of isoflurane anesthesia and intravenous morphine self-administration on regional glucose metabolism ([ 18 F]FDG-PET) of male Sprague-Dawley rats. Eur J Neurosci 2017; 45:922-931. [PMID: 28196306 DOI: 10.1111/ejn.13542] [Citation(s) in RCA: 18] [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] [Received: 10/13/2016] [Revised: 02/07/2017] [Accepted: 02/08/2017] [Indexed: 01/22/2023]
Abstract
Although certain drugs of abuse are known to disrupt brain glucose metabolism (BGluM), the effects of opiates on BGluM are not well characterized. Moreover, preclinical positron emission tomography (PET) studies anesthetize animals during the scan, which limits clinical applications. We investigated the effects of (i) isoflurane anesthesia and (ii) intravenous morphine self-administration (MSA) on BGluM in rats. Jugular vein cannulated adult male Sprague-Dawley rats self-administered either saline (SSA) or morphine (0.5 mg/kg/infusion, 4 h/day for 12 days). All animals were scanned twice with [18 F]-fluoro-deoxy-glucose (FDG)-PET/CT at a baseline and at 2-day withdrawal from self-administration. After the IV injection of FDG, one batch of animals (n = 14) was anesthetized with isoflurane and the other batch (n = 16) was kept awake during the FDG uptake (45 min). After FDG uptake, all animals were anesthetized in order to perform a PET/CT scan (30 min). Isoflurane anesthesia, as compared to the awake condition, reduced BGluM in the olfactory, cortex, thalamus, and basal ganglia, while increasing BGluM in the midbrain, hypothalamus, hippocampus, and cerebellum. Morphine self-administered animals exhibited withdrawal signs (piloerection and increased defecation), drug seeking, and locomotor stimulation to morphine (0.5 mg/kg) during the 2 day withdrawal. The BGluM in the striatum was increased in the MSA group as compared to the SSA group; this effect was observed only in the isoflurane anesthesia, not the awake condition. These findings suggest that the choice of the FDG uptake condition may be important in preclinical PET studies and increased BGluM in the striatum may be associated with opiate seeking in withdrawal.
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Affiliation(s)
- Thomas Y Park
- Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD, 20814, USA.,Center for the Study of Traumatic Stress, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Kevin S Nishida
- Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD, 20814, USA.,Center for the Study of Traumatic Stress, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Colin M Wilson
- Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.,Department of Radiology, University of New Mexico, Albuquerque, NM, USA
| | - Shalini Jaiswal
- Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Jessica Scott
- Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Andrew R Hoy
- Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.,Department of Radiology and Radiological Sciences, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Reed G Selwyn
- Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.,Department of Radiology, University of New Mexico, Albuquerque, NM, USA.,Department of Radiology and Radiological Sciences, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Bernard J Dardzinski
- Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.,Department of Radiology and Radiological Sciences, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Kwang H Choi
- Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD, 20814, USA.,Center for the Study of Traumatic Stress, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.,Program in Neuroscience, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.,Graduate School of Nursing, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
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10
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Yu F, Shukla DK, Armstrong RC, Marion CM, Radomski KL, Selwyn RG, Dardzinski BJ. Repetitive Model of Mild Traumatic Brain Injury Produces Cortical Abnormalities Detectable by Magnetic Resonance Diffusion Imaging, Histopathology, and Behavior. J Neurotrauma 2016; 34:1364-1381. [PMID: 27784203 PMCID: PMC5385606 DOI: 10.1089/neu.2016.4569] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [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] [Indexed: 12/14/2022] Open
Abstract
Noninvasive detection of mild traumatic brain injury (mTBI) is important for evaluating acute through chronic effects of head injuries, particularly after repetitive impacts. To better detect abnormalities from mTBI, we performed longitudinal studies (baseline, 3, 6, and 42 days) using magnetic resonance diffusion tensor imaging (DTI) and diffusion kurtosis imaging (DKI) in adult mice after repetitive mTBI (r-mTBI; daily × 5) or sham procedure. This r-mTBI produced righting reflex delay and was first characterized in the corpus callosum to demonstrate low levels of axon damage, astrogliosis, and microglial activation, without microhemorrhages. High-resolution DTI-DKI was then combined with post-imaging pathological validation along with behavioral assessments targeted for the impact regions. In the corpus callosum, only DTI fractional anisotropy at 42 days showed significant change post-injury. Conversely, cortical regions under the impact site (M1–M2, anterior cingulate) had reduced axial diffusivity (AD) at all time points with a corresponding increase in axial kurtosis (Ka) at 6 days. Post-imaging neuropathology showed microglial activation in both the corpus callosum and cortex at 42 days after r-mTBI. Increased cortical microglial activation correlated with decreased cortical AD after r-mTBI (r = −0.853; n = 5). Using Thy1-YFP-16 mice to fluorescently label neuronal cell bodies and processes revealed low levels of axon damage in the cortex after r-mTBI. Finally, r-mTBI produced social deficits consistent with the function of this anterior cingulate region of cortex. Overall, vulnerability of cortical regions is demonstrated after mild repetitive injury, with underlying differences of DTI and DKI, microglial activation, and behavioral deficits.
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Affiliation(s)
- Fengshan Yu
- 1 Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences , Bethesda, Maryland.,2 Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences , Bethesda, Maryland
| | - Dinesh K Shukla
- 1 Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences , Bethesda, Maryland.,5 Department of Psychiatry, University of Maryland School of Medicine , Baltimore, Maryland
| | - Regina C Armstrong
- 1 Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences , Bethesda, Maryland.,2 Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences , Bethesda, Maryland.,3 Program in Neuroscience, Uniformed Services University of the Health Sciences , Bethesda, Maryland
| | - Christina M Marion
- 1 Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences , Bethesda, Maryland.,3 Program in Neuroscience, Uniformed Services University of the Health Sciences , Bethesda, Maryland
| | - Kryslaine L Radomski
- 1 Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences , Bethesda, Maryland.,2 Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences , Bethesda, Maryland
| | - Reed G Selwyn
- 1 Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences , Bethesda, Maryland.,6 Department of Radiology, University of New Mexico , Albuquerque, New Mexico
| | - Bernard J Dardzinski
- 1 Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences , Bethesda, Maryland.,4 Department of Radiology and Radiological Sciences, Uniformed Services University of the Health Sciences , Bethesda, Maryland
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11
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von Leden RE, Selwyn RG, Jaiswal S, Wilson CM, Khayrullina G, Byrnes KR. (18)F-FDG-PET imaging of rat spinal cord demonstrates altered glucose uptake acutely after contusion injury. Neurosci Lett 2016; 621:126-132. [PMID: 27084688 DOI: 10.1016/j.neulet.2016.04.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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: 10/30/2015] [Revised: 03/25/2016] [Accepted: 04/11/2016] [Indexed: 12/13/2022]
Abstract
Spinal cord injury (SCI) results in an acute reduction in neuronal and glial cell viability, disruption in axonal tract integrity, and prolonged increases in glial activity and inflammation, all of which can influence regional metabolism and glucose utilization. To date, the understanding of glucose uptake and utilization in the injured spinal cord is limited. Positron emission tomography (PET)-based measurements of glucose uptake may therefore serve as a novel biomarker for SCI. This study aimed to determine the acute and sub-acute glucose uptake pattern after SCI to determine its potential as a novel non-invasive tool for injury assessment and to begin to understand the glucose uptake pattern following acute SCI. Briefly, adult male Sprague-Dawley rats were subjected to moderate contusion SCI, confirmed by locomotor function and histology. PET imaging with [(18)F] Fluorodeoxyglucose (FDG) was performed prior to injury and at 6 and 24h and 15days post-injury (dpi). FDG-PET imaging revealed significantly depressed glucose uptake at 6h post-injury at the lesion epicenter that returned to sham/naïve levels at 24h and 15 dpi after moderate injury. FDG uptake at 15 dpi was likely influenced by a combination of elevated glial presence and reduced neuronal viability. These results show that moderate SCI results in acute depression in glucose uptake followed by an increase in glucose uptake that may be related to neuroinflammation. This acute and sub-acute uptake, which is dependent on cellular responses, may represent a therapeutic target.
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Affiliation(s)
- Ramona E von Leden
- Neuroscience Program, Uniformed Services University, 4301 Jones Bridge Road, Bethesda, MD 20814, United States.
| | - Reed G Selwyn
- Department of Radiology, University of New Mexico, Albuquerque, NM 87131, United States; Department of Radiology and Radiological Sciences, Uniformed Services University, 4301 Jones Bridge Road, Bethesda, MD 20814, United States.
| | - Shalini Jaiswal
- Translational Imaging Core, Center for Neuroscience and Regenerative Medicine, 4301 Jones Bridge Road, Bethesda, MD 20814, United States.
| | - Colin M Wilson
- Translational Imaging Core, Center for Neuroscience and Regenerative Medicine, 4301 Jones Bridge Road, Bethesda, MD 20814, United States.
| | - Guzal Khayrullina
- Department of Anatomy, Physiology, and Genetics, Uniformed Services University, 4301 Jones Bridge Road, Bethesda, MD 20814, United States.
| | - Kimberly R Byrnes
- Neuroscience Program, Uniformed Services University, 4301 Jones Bridge Road, Bethesda, MD 20814, United States; Department of Anatomy, Physiology, and Genetics, Uniformed Services University, 4301 Jones Bridge Road, Bethesda, MD 20814, United States.
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12
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Selwyn RG, Cooney SJ, Khayrullina G, Hockenbury N, Wilson CM, Jaiswal S, Bermudez S, Armstrong RC, Byrnes KR. Outcome after Repetitive Mild Traumatic Brain Injury Is Temporally Related to Glucose Uptake Profile at Time of Second Injury. J Neurotrauma 2016; 33:1479-91. [PMID: 26650903 DOI: 10.1089/neu.2015.4129] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Repeated mild traumatic brain injury (rmTBI) results in worsened outcomes, compared with a single injury, but the mechanism of this phenomenon is unclear. We have previously shown that mild TBI in a rat lateral fluid percussion model results in globally depressed glucose uptake, with a peak depression at 24 h that resolves by 16 days post-injury. The current study investigated the outcomes of a repeat injury conducted at various times during this period of depressed glucose uptake. Adult male rats were therefore subjected to rmTBI with a latency of 24 h, 5 days, or 15 days between injuries, followed by assessment of motor function, histopathology, and glucose uptake using positron emission tomography (PET). Rats that received a 24 h rmTBI showed significant deficits in motor function tasks, as well as significant increases in lesion volume and neuronal damage. The level of microglial and astrocytic activation also was associated with the timing of the second impact. Finally, rmTBI with latencies of 24 h and 5 days showed significant alterations in [(18)F]fluorodeoxyglucose uptake, compared with baseline scans. Therefore, we conclude that the state of the metabolic environment, as indicated by FDG-PET at the time of the repeat injury, significantly influences neurological outcomes.
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Affiliation(s)
- Reed G Selwyn
- 1 Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences , Bethesda, Maryland
- 2 Department of Radiology, Uniformed Services University of the Health Sciences , Bethesda, Maryland
- 3 Department of Radiology, University of New Mexico , Albuquerque, New Mexico
| | - Sean J Cooney
- 1 Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences , Bethesda, Maryland
- 4 Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences , Bethesda, Maryland
| | - Guzal Khayrullina
- 4 Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences , Bethesda, Maryland
| | - Nicole Hockenbury
- 4 Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences , Bethesda, Maryland
| | - Colin M Wilson
- 1 Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences , Bethesda, Maryland
| | - Shalini Jaiswal
- 1 Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences , Bethesda, Maryland
| | - Sara Bermudez
- 4 Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences , Bethesda, Maryland
| | - Regina C Armstrong
- 1 Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences , Bethesda, Maryland
- 4 Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences , Bethesda, Maryland
| | - Kimberly R Byrnes
- 1 Center for Neuroscience and Regenerative Medicine, Uniformed Services University of the Health Sciences , Bethesda, Maryland
- 4 Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences , Bethesda, Maryland
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13
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Byrnes KR, Wilson CM, Brabazon F, von Leden R, Jurgens JS, Oakes TR, Selwyn RG. FDG-PET imaging in mild traumatic brain injury: a critical review. Front Neuroenergetics 2014; 5:13. [PMID: 24409143 PMCID: PMC3885820 DOI: 10.3389/fnene.2013.00013] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Accepted: 12/23/2013] [Indexed: 11/30/2022]
Abstract
Traumatic brain injury (TBI) affects an estimated 1.7 million people in the United States and is a contributing factor to one third of all injury related deaths annually. According to the CDC, approximately 75% of all reported TBIs are concussions or considered mild in form, although the number of unreported mild TBIs (mTBI) and patients not seeking medical attention is unknown. Currently, classification of mTBI or concussion is a clinical assessment since diagnostic imaging is typically inconclusive due to subtle, obscure, or absent changes in anatomical or physiological parameters measured using standard magnetic resonance (MR) or computed tomography (CT) imaging protocols. Molecular imaging techniques that examine functional processes within the brain, such as measurement of glucose uptake and metabolism using [18F]fluorodeoxyglucose and positron emission tomography (FDG-PET), have the ability to detect changes after mTBI. Recent technological improvements in the resolution of PET systems, the integration of PET with magnetic resonance imaging (MRI), and the availability of normal healthy human databases and commercial image analysis software contribute to the growing use of molecular imaging in basic science research and advances in clinical imaging. This review will discuss the technological considerations and limitations of FDG-PET, including differentiation between glucose uptake and glucose metabolism and the significance of these measurements. In addition, the current state of FDG-PET imaging in assessing mTBI in clinical and preclinical research will be considered. Finally, this review will provide insight into potential critical data elements and recommended standardization to improve the application of FDG-PET to mTBI research and clinical practice.
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Affiliation(s)
- Kimberly R Byrnes
- Department of Anatomy, Physiology and Genetics, Uniformed Services University Bethesda, MD, USA ; Neuroscience Program, Department of Neuroscience, Uniformed Services University Bethesda, MD, USA ; Center for Neuroscience and Regenerative Medicine Bethesda, MD, USA
| | - Colin M Wilson
- Center for Neuroscience and Regenerative Medicine Bethesda, MD, USA ; Department of Radiology and Radiological Sciences, Uniformed Services University Bethesda, MD, USA
| | - Fiona Brabazon
- Neuroscience Program, Department of Neuroscience, Uniformed Services University Bethesda, MD, USA
| | - Ramona von Leden
- Neuroscience Program, Department of Neuroscience, Uniformed Services University Bethesda, MD, USA
| | - Jennifer S Jurgens
- Nuclear Medicine Service, Walter Reed National Military Medical Center Bethesda, MD, USA ; Department of Neurology, Uniformed Services University Bethesda, MD, USA
| | | | - Reed G Selwyn
- Center for Neuroscience and Regenerative Medicine Bethesda, MD, USA ; Department of Radiology and Radiological Sciences, Uniformed Services University Bethesda, MD, USA
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14
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McGuire JL, Bergstrom HC, Parker CC, Le T, Morgan M, Tang H, Selwyn RG, Silva AC, Choi K, Ursano RJ, Palmer AA, Johnson LR. Traits of fear resistance and susceptibility in an advanced intercross line. Eur J Neurosci 2013; 38:3314-24. [PMID: 23968228 DOI: 10.1111/ejn.12337] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [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: 05/02/2013] [Revised: 07/09/2013] [Accepted: 07/15/2013] [Indexed: 12/21/2022]
Abstract
Genetic variability in the strength and precision of fear memory is hypothesised to contribute to the etiology of anxiety disorders, including post-traumatic stress disorder. We generated fear-susceptible (F-S) or fear-resistant (F-R) phenotypes from an F8 advanced intercross line (AIL) of C57BL/6J and DBA/2J inbred mice by selective breeding. We identified specific traits underlying individual variability in Pavlovian conditioned fear learning and memory. Offspring of selected lines differed in the acquisition of conditioned fear. Furthermore, F-S mice showed greater cued fear memory and generalised fear in response to a novel context than F-R mice. F-S mice showed greater basal corticosterone levels and hypothalamic corticotrophin-releasing hormone (CRH) mRNA levels than F-R mice, consistent with higher hypothalamic-pituitary-adrenal (HPA) axis drive. Hypothalamic mineralocorticoid receptor and CRH receptor 1 mRNA levels were decreased in F-S mice as compared with F-R mice. Manganese-enhanced magnetic resonance imaging (MEMRI) was used to investigate basal levels of brain activity. MEMRI identified a pattern of increased brain activity in F-S mice that was driven primarily by the hippocampus and amygdala, indicating excessive limbic circuit activity in F-S mice as compared with F-R mice. Thus, selection pressure applied to the AIL population leads to the accumulation of heritable trait-relevant characteristics within each line, whereas non-behaviorally relevant traits remain distributed. Selected lines therefore minimise false-positive associations between behavioral phenotypes and physiology. We demonstrate that intrinsic differences in HPA axis function and limbic excitability contribute to phenotypic differences in the acquisition and consolidation of associative fear memory. Identification of system-wide traits predisposing to variability in fear memory may help in the direction of more targeted and efficacious treatments for fear-related pathology.
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Affiliation(s)
- Jennifer L McGuire
- Department of Psychiatry and Program in Neuroscience, School of Medicine, Uniformed Services University (USU), Bethesda, MD, USA
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15
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Bergstrom HC, McDonald CG, Dey S, Tang H, Selwyn RG, Johnson LR. The structure of Pavlovian fear conditioning in the amygdala. Brain Struct Funct 2012. [DOI: 10.1007/s00429-012-0478-2] [Citation(s) in RCA: 21] [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: 11/30/2022]
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16
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Nickles RJ, Avila-Rodriguez MA, Nye JA, Houser EN, Selwyn RG, Schueller MJ, Christian BT, Jensen M. Sustainable production of orphan radionuclides at Wisconsin. Q J Nucl Med Mol Imaging 2008; 52:134-139. [PMID: 18043541 PMCID: PMC6497055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Over a hundred proton-induced reactions have been studied at the University of Wisconsin Medical Physics department since the installation of the first CTI RDS 112 in 1985. The focus has been to measure thick target yields at 11 MeV, in an effort to concentrate on the practical production of positron emitting radionuclides that have favorable decay characteristics, high yields and the potential for labeling pivotal biological tracers. This review covers our recent advances to scale-up the production of the heavy halogens and transition metals as feed-stock for non-conventional PET tracers that are currently attracting increased attention in oncology.
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Affiliation(s)
- R J Nickles
- Medical Physics Department, University of Wisconsin, Madison, WI 53706, USA.
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17
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Selwyn RG, Avila-Rodriguez MA, Converse AK, Hampel JA, Jaskowiak CJ, McDermott JC, Warner TF, Nickles RJ, Thomadsen BR. 18F-labeled resin microspheres as surrogates for90Y resin microspheres used in the treatment of hepatic tumors: a radiolabeling and PET validation study. Phys Med Biol 2007; 52:7397-408. [DOI: 10.1088/0031-9155/52/24/013] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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18
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Avila-Rodriguez MA, Selwyn RG, Hampel JA, Thomadsen BR, Dejesus OT, Converse AK, Nickles RJ. Positron-emitting resin microspheres as surrogates of 90Y SIR-Spheres: a radiolabeling and stability study. Nucl Med Biol 2007; 34:585-90. [PMID: 17591559 DOI: 10.1016/j.nucmedbio.2007.04.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [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: 02/12/2007] [Revised: 03/09/2007] [Accepted: 04/06/2007] [Indexed: 11/15/2022]
Abstract
Commercially available resin microspheres and SIR-Spheres were labeled with metallic positron emitters and evaluated as positron emission tomography (PET) imaging surrogates of (90)Y SIR-Spheres. Radiolabeling was performed using a batch method, and in vitro stability over 24 h was evaluated in saline at physiological pH at 37 degrees C. The activity per microsphere distribution, as evaluated by autoradiography, showed the activity per microsphere to be proportional to the square radius of the spheres, suggesting surface binding. The in vivo stability of radiolabeling was evaluated in rats by micro-PET imaging after the intravenous injection of labeled microspheres. The different resin microspheres and radionuclides evaluated in this study all showed good radiolabeling efficiency and in vitro stability. However, only resins labeled with (86)Y and (89)Zr proved to have the in vivo stability required for clinical applications.
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Affiliation(s)
- Miguel A Avila-Rodriguez
- Department of Medical Physics, School of Medicine and Public Health, University of Wisconsin, Madison, WI 53706, USA.
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