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Manzanera Esteve IV, Wang F, Reed JL, Qi HX, Thayer W, Gore JC, Chen LM. Model-based parcellation of diffusion MRI of injured spinal cord predicts hand use impairment and recovery in squirrel monkeys. Behav Brain Res 2024; 459:114808. [PMID: 38081518 PMCID: PMC10865381 DOI: 10.1016/j.bbr.2023.114808] [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: 07/26/2023] [Revised: 11/30/2023] [Accepted: 12/07/2023] [Indexed: 12/17/2023]
Abstract
A mathematical model-based parcellation of magnetic resonance diffusion tensor images (DTI) has been developed to quantify progressive changes in three types of tissues - grey (GM), white matter (WM), and damaged spinal cord tissue, along with behavioral assessments over a 6 month period following targeted spinal cord injuries (SCI) in monkeys. Sigmoid Gompertz function based fittings of DTI metrics provide early indicators that correlate with, and predict, recovery of hand grasping behavior. Our three tissue pool model provided unbiased, data-driven segmentation of spinal cord images and identified DTI metrics that can serve as reliable biomarkers of severity of spinal cord injuries and predictors of behavioral outcomes.
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Affiliation(s)
- Isaac V Manzanera Esteve
- Department of Plastic Surgery, Vanderbilt University Medical Center, Nashville, TN, USA; Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, USA.
| | - Feng Wang
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Jamie L Reed
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Hui Xin Qi
- Department of Psychology, Vanderbilt University, Nashville, TN, USA
| | - Wesley Thayer
- Department of Plastic Surgery, Vanderbilt University Medical Center, Nashville, TN, USA
| | - John C Gore
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | - Li Min Chen
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA
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Manzanera Esteve IV, Pollins AC, Nussenbaum ME, Chaker S, Yan L, Dortch R, Thayer WP. Longitudinal traumatic peripheral nerve injury recovery: quantitative description, classification and prediction. Regen Med 2023; 18:389-397. [PMID: 37158365 DOI: 10.2217/rme-2023-0011] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023] Open
Abstract
Aim: Repair of peripheral nerves is recommended following transection. Systematic evaluation of longitudinal recovery in injury models is needed to improve patient management. Gompertz function provided straightforward interpretation and prediction of recovery outcomes. Materials & methods: Behavioural sciatic function index, measured 3 days post injury, and weekly for 12 weeks following full nerve transection and repair (n = 6) as well as crush injuries (n = 6). Results: Gompertz parametrization provided early classification between types of traumatic peripheral nerve injuries following surgical repair. Results distinguished injury nerves (A: p < 0.01; Ti: p < 0.05; Ic: p < 0.05 and outcome: p < 0.01). Early prognostication of outcomes (crush: 5.5 ± 0.3 and cut/repair: 8 ± 1 weeks) preceded current methods. Conclusion: Our findings identify injury type, state of recovery and early prognostication of outcome.
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Affiliation(s)
- Isaac V Manzanera Esteve
- Department of Plastic Surgery, Vanderbilt University Medical Center; Nashville, TN 37232, USA
- Institute of Imaging Science, Vanderbilt University Medical Center; Nashville, TN 37232, USA
| | - Alonda C Pollins
- Department of Plastic Surgery, Vanderbilt University Medical Center; Nashville, TN 37232, USA
| | - Marlieke E Nussenbaum
- Department of Plastic Surgery, Vanderbilt University Medical Center; Nashville, TN 37232, USA
| | - Sara Chaker
- Department of Plastic Surgery, Vanderbilt University Medical Center; Nashville, TN 37232, USA
| | - Ling Yan
- Department of Plastic Surgery, Vanderbilt University Medical Center; Nashville, TN 37232, USA
| | - Richard Dortch
- Translational Neuroscience, Barrow Neurological institute, Phoenix; AZ 85013, USA
| | - Wesley P Thayer
- Department of Plastic Surgery, Vanderbilt University Medical Center; Nashville, TN 37232, USA
- Department of Biomedical Engineering, Vanderbilt University; Nashville, TN 37235, USA
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Duque DH, Racca JM, Manzanera Esteve IV, Yang PF, Gore JC, Chen LM. Machine-learning-based video analysis of grasping behavior during recovery from cervical spinal cord injury. Behav Brain Res 2023; 443:114150. [PMID: 36216141 PMCID: PMC10733977 DOI: 10.1016/j.bbr.2022.114150] [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: 05/23/2022] [Revised: 10/05/2022] [Accepted: 10/05/2022] [Indexed: 11/17/2022]
Abstract
Comprehensive characterizations of hand grasping behaviors after cervical spinal cord injuries are fundamental for developing rehabilitation strategies to promote recovery in spinal-cord-injured primates. We used the machine-learning-based video analysis software, DeepLabCut, to sensitively quantify kinematic aspects of grasping behavioral deficits in squirrel monkeys with C5-level spinal cord injuries. Three squirrel monkeys were trained to grasp sugar pellets from wells of varying depths before and after a left unilateral lesion of the cervical dorsal column. Using DeepLabCut, we identified post-lesion deficits in kinematic grasping behavior that included changes in digit orientation, increased variance in vertical and horizontal digit movement, and longer time to complete the task. While video-based analyses of grasping behavior demonstrated deficits in fine-scale digit function that persisted through at least 14 weeks post-injury, traditional end-point behavioral analyses showed a recovery of global hand function as evidenced by recovery of the proportion of successful retrievals by approximately 14 weeks post-injury. The combination of traditional end-point and video-based kinematic analyses provides a more comprehensive characterization of grasping behavior and highlights that global grasping performance may recover despite persistent fine-scale kinematic deficits in digit function. Machine-learning-based video analysis of kinematic digit function, in conjunction with traditional end-point behavioral analyses of grasping behavior, provide sensitive and specific indices for monitoring recovery of fine-grained hand sensorimotor behavior after spinal cord injury that can aid future studies that seek to develop targeted therapeutic interventions for improving behavioral outcomes.
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Affiliation(s)
- Daniela Hernandez Duque
- Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University Medical Center, Nashville, TN, USA; Vanderbilt Institute of Surgery and Engineering (VISE), Vanderbilt University Medical Center, Nashville, TN, USA; Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Jordan M Racca
- Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University Medical Center, Nashville, TN, USA; Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Isaac V Manzanera Esteve
- Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University Medical Center, Nashville, TN, USA; Department of Plastic Surgery, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Pai-Feng Yang
- Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University Medical Center, Nashville, TN, USA; Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA
| | - John C Gore
- Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University Medical Center, Nashville, TN, USA; Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Biomedical Engineering, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Li Min Chen
- Vanderbilt University Institute of Imaging Science (VUIIS), Vanderbilt University Medical Center, Nashville, TN, USA; Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA.
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Khandekar D, Dahunsi DO, Manzanera Esteve IV, Reid S, Rathmell JC, Titze J, Tiriveedhi V. Low-Salt Diet Reduces Anti-CTLA4 Mediated Systemic Immune-Related Adverse Events while Retaining Therapeutic Efficacy against Breast Cancer. Biology (Basel) 2022; 11:810. [PMID: 35741331 PMCID: PMC9219826 DOI: 10.3390/biology11060810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 05/14/2022] [Accepted: 05/23/2022] [Indexed: 11/16/2022]
Abstract
Immune checkpoint inhibitor (ICI) therapy has revolutionized the breast cancer treatment landscape. However, ICI-induced systemic inflammatory immune-related adverse events (irAE) remain a major clinical challenge. Previous studies in our laboratory and others have demonstrated that a high-salt (HS) diet induces inflammatory activation of CD4+T cells leading to anti-tumor responses. In our current communication, we analyzed the impact of dietary salt modification on therapeutic and systemic outcomes in breast-tumor-bearing mice following anti-cytotoxic T-lymphocyte-associated protein 4 (CTLA4) monoclonal antibody (mAb) based ICI therapy. As HS diet and anti-CTLA4 mAb both exert pro-inflammatory activation of CD4+T cells, we hypothesized that a combination of these would lead to enhanced irAE response, while low-salt (LS) diet through blunting peripheral inflammatory action of CD4+T cells would reduce irAE response. We utilized an orthotopic murine breast tumor model by injecting Py230 murine breast cancer cells into syngeneic C57Bl/6 mice. In an LS diet cohort, anti-CTLA4 mAb treatment significantly reduced tumor progression (day 35, 339 ± 121 mm3), as compared to isotype mAb (639 ± 163 mm3, p < 0.05). In an HS diet cohort, treatment with anti-CTLA4 reduced the survival rate (day 80, 2/15) compared to respective normal/regular salt (NS) diet cohort (8/15, p < 0.05). Further, HS plus anti-CTLA4 mAb caused an increased expression of inflammatory cytokines (IFNγ and IL-1β) in lung infiltrating and peripheral circulating CD4+T cells. This inflammatory activation of CD4+T cells in the HS plus anti-CTLA4 cohort was associated with the upregulation of inflammasome complex activity. However, an LS diet did not induce any significant irAE response in breast-tumor-bearing mice upon treatment with anti-CTLA4 mAb, thus suggesting the role of high-salt diet in irAE response. Importantly, CD4-specific knock out of osmosensitive transcription factor NFAT5 using CD4cre/creNFAT5flox/flox transgenic mice caused a downregulation of high-salt-mediated inflammatory activation of CD4+T cells and irAE response. Taken together, our data suggest that LS diet inhibits the anti-CTLA4 mAb-induced irAE response while retaining its anti-tumor efficacy.
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Affiliation(s)
- Durga Khandekar
- Department of Biological Sciences, Tennessee State University, Nashville, TN 37209, USA;
| | - Debolanle O. Dahunsi
- Department Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; (D.O.D.); (J.C.R.)
| | | | - Sonya Reid
- Division of Hematology and Oncology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA;
| | - Jeffrey C. Rathmell
- Department Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; (D.O.D.); (J.C.R.)
| | - Jens Titze
- Program in Cardiovascular and Metabolic Disorders, Duke-NUS Medical School, Singapore 169857, Singapore;
- Division of Nephrology, School of Medicine, Duke University, Durham, NC 27710, USA
| | - Venkataswarup Tiriveedhi
- Department of Biological Sciences, Tennessee State University, Nashville, TN 37209, USA;
- Division of Pharmacology, Vanderbilt University, Nashville, TN 37240, USA
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Huang YJ, Assi PE, Drolet BC, Al Kassis S, Bastas G, Chaker S, Manzanera Esteve IV, Perdikis G, Thayer WP. A Systematic Review and Meta-analysis on the Incidence of Patients With Lower-Limb Amputations Who Developed Symptomatic Neuromata in the Residual Limb. Ann Plast Surg 2022; 88:574-580. [PMID: 34270470 DOI: 10.1097/sap.0000000000002946] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Neuromata developed after major extremity amputation can cause pain, limit the use of prosthetics, and negatively affect the quality of life. The frequency of postamputation neuroma varies widely. The objective of this study was to determine the incidence of patients who developed symptomatic neuromata after lower-limb amputation through a systematic review and meta-analysis. METHODS A systematic review of the literature was performed on 4 major databases. Studies that reported the incidence of symptomatic neuroma in lower-limb amputees were included. A meta-analysis was performed to calculate the pooled incidence of neuromata. RESULTS Thirteen studies consisting of 1329 patients were included in this meta-analysis. The reported incidence of patients who developed symptomatic neuromata ranged between 4% and 49%. The median duration of follow-up was 8.6 years (interquartile range, 2.0-17.4 years). The pooled percentage (95% confidence interval [CI]) of lower-limb amputees who developed symptomatic neuromata was 19% (12%-29%). In studies with a duration of follow-up at least 3 years, the pooled percentage (95% CI) of lower-limb amputees who developed symptomatic neuromata was 30% (22%-40%). In studies with a follow-up period of fewer than 3 years, the pooled percentage (95% CI) of neuroma incidence was 3% (2%-6%). CONCLUSIONS In summary, the overall incidence of patients who developed symptomatic neuromata was 19% or approximately 1 in 5 lower-limb amputees. Symptomatic neuromata are more commonly diagnosed when the follow-up period is longer than 3 years. These findings suggest that neuroma after amputation might be underestimated in studies with a short duration of follow-up.
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Affiliation(s)
| | | | | | | | - Gerasimos Bastas
- Department of Physical Medicine and Rehabilitation, Vanderbilt University
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Manzanera Esteve IV, Farinas AF, Pollins AC, Nussenbaum ME, Cardwell NL, Kahn H, Does MD, Dortch RD, Thayer WP. Noninvasive diffusion MRI to determine the severity of peripheral nerve injury. Magn Reson Imaging 2021; 83:96-106. [PMID: 34403759 DOI: 10.1016/j.mri.2021.08.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 10/11/2020] [Revised: 07/07/2021] [Accepted: 08/12/2021] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Primary repair of peripheral nerves is recommended following transection; however, patient management following repair is challenged by a lack of biomarkers to nerve regeneration. Previous studies have demonstrated that diffusion magnetic resonance imaging (MRI) may provide viable biomarkers of nerve regeneration in injury models; though, these methods have not been systematically evaluated in graded partial transections and repairs. METHODS Ex vivo diffusion MRI was performed in fixed rat sciatic nerve samples 4 or 12 weeks following partial nerve transection and repair (25% cut = 12, 50% cut = 12 and 75% cut = 11), crush injuries (n = 12), and sham surgeries (n = 9). Behavioral testing and histologic evaluation were performed in the same animals and nerve samples for comparison. RESULTS Diffusion tractography provided visual characterizations of nerve damage and recovery consistent with the expected degree of injury within each cohort. In addition, quantitative indices from diffusion MRI correlated with both histological and behavioral evaluations, the latter of indicated full recovery for sham and crush nerves and limited recovery in all partially transected/repaired nerves. Nerve recovery between 4 and 12 weeks was statistically significant in partial transections 50% and 75% depth cuts (p = 0.043 and p = 0.022) but not for 25% transections. INTERPRETATION Our findings suggest that DTI can i) distinguish different degrees of partial nerve transection following surgical repair and ii) map spatially heterogeneous nerve recovery (e.g., due to collateral sprouting) from 4 to 12 weeks in partially transected nerves.
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Affiliation(s)
- Isaac V Manzanera Esteve
- Vanderbilt University Medical Center, Department Radiology and Radiological Sciences, Nashville, TN, United States of America; Vanderbilt University Medical Center, Institute of Imaging Science, Nashville, TN, United States of America.
| | - Angel F Farinas
- Vanderbilt University Medical Center, Department of Plastic Surgery, Nashville, TN, United States of America
| | - Alonda C Pollins
- Vanderbilt University Medical Center, Department of Plastic Surgery, Nashville, TN, United States of America
| | - Marlieke E Nussenbaum
- Vanderbilt University Medical Center, Department of Plastic Surgery, Nashville, TN, United States of America
| | - Nancy L Cardwell
- Vanderbilt University Medical Center, Department of Plastic Surgery, Nashville, TN, United States of America
| | - Hakmook Kahn
- Vanderbilt University Medical Center, Department of Biostatistics, Nashville, TN, USA
| | - Mark D Does
- Vanderbilt University Medical Center, Department Radiology and Radiological Sciences, Nashville, TN, United States of America; Vanderbilt University Medical Center, Institute of Imaging Science, Nashville, TN, United States of America; Vanderbilt University, Department of Biomedical Engineering, Nashville, TN, United States of America
| | - Richard D Dortch
- Vanderbilt University Medical Center, Department Radiology and Radiological Sciences, Nashville, TN, United States of America; Vanderbilt University Medical Center, Institute of Imaging Science, Nashville, TN, United States of America; Vanderbilt University, Department of Biomedical Engineering, Nashville, TN, United States of America; Barrow Neurological Institute, Division of Neuroimaging Research, Phoenix, AZ, United States of America
| | - Wesley P Thayer
- Vanderbilt University Medical Center, Department of Plastic Surgery, Nashville, TN, United States of America; Vanderbilt University, Department of Biomedical Engineering, Nashville, TN, United States of America
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Pridmore MD, Glassman GE, Pollins AC, Manzanera Esteve IV, Drolet BC, Weikert DR, Does MD, Perdikis G, Thayer WP, Dortch RD. Initial findings in traumatic peripheral nerve injury and repair with diffusion tensor imaging. Ann Clin Transl Neurol 2021; 8:332-347. [PMID: 33403827 PMCID: PMC7886047 DOI: 10.1002/acn3.51270] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 11/19/2020] [Accepted: 11/19/2020] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVE Management of peripheral nerve injuries requires physicians to rely on qualitative measures from patient history, electromyography, and physical exam. Determining a successful nerve repair can take months to years for proximal injuries, and the resulting delays in clinical decision-making can lead to a negative impact on patient outcomes. Early identification of a failed nerve repair could prevent permanent muscle atrophy and loss of function. This study aims to test the feasibility of performing diffusion tensor imaging (DTI) to evaluate injury and recovery following repair of wrist trauma. We hypothesize that DTI provides a noninvasive and reliable assessment of regeneration, which may improve clinical decision-making and alter the clinical course of surgical interventions. METHODS Clinical and MRI measurements from subjects with traumatic peripheral nerve injury, carpal tunnel syndrome, and healthy control subjects were compared to evaluate the relationship between DTI metrics and injury severity. RESULTS Fractional anisotropy from DTI was sensitive to differences between damaged and healthy nerves, damaged and compressed nerves, and injured and healthy contralateral nerves. Longitudinal measurements in two injury subjects also related to clinical outcomes. Implications of other diffusion measures are also discussed. INTERPRETATION DTI is a sensitive tool for wrist nerve injuries and can be utilized for monitoring nerve recovery. Across three subjects with nerve injuries, this study has shown how DTI can detect abnormalities between injured and healthy nerves, measure recovery, and determine if re-operation was successful. Additional comparisons to carpal tunnel syndrome and healthy nerves show that DTI is sensitive to the degree of impairment.
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Affiliation(s)
- Michael D. Pridmore
- Vanderbilt Institute for Imaging ScienceVanderbilt University Medical CenterNashvilleTennesseeUSA
| | - Gabriella E. Glassman
- Department of Plastic SurgeryVanderbilt University Medical CenterNashvilleTennesseeUSA
| | - Alonda C. Pollins
- Department of Plastic SurgeryVanderbilt University Medical CenterNashvilleTennesseeUSA
| | | | - Brian C. Drolet
- Department of Plastic SurgeryVanderbilt University Medical CenterNashvilleTennesseeUSA
| | - Douglas R. Weikert
- Department of Orthopaedic SurgeryVanderbilt University Medical CenterNashvilleTennesseeUSA
| | - Mark D. Does
- Department of Biomedical EngineeringVanderbilt UniversityNashvilleTennesseeUSA
| | - Galen Perdikis
- Department of Plastic SurgeryVanderbilt University Medical CenterNashvilleTennesseeUSA
| | - Wesley P. Thayer
- Department of Plastic SurgeryVanderbilt University Medical CenterNashvilleTennesseeUSA
| | - Richard D. Dortch
- Vanderbilt Institute for Imaging ScienceVanderbilt University Medical CenterNashvilleTennesseeUSA
- Department of Biomedical EngineeringVanderbilt UniversityNashvilleTennesseeUSA
- Department of Neuroimaging ResearchBarrow Neurological InstitutePhoenixArizonaUSA
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Manzanera Esteve IV, Farinas AF, Pollins AC, Nussenbaum ME, Cardwell NL, Kang H, Does MD, Thayer WP, Dortch RD. Author Correction: Probabilistic Assessment of Nerve Regeneration with Diffusion MRI in Rat Models of Peripheral Nerve Trauma. Sci Rep 2020; 10:7492. [PMID: 32346062 PMCID: PMC7189241 DOI: 10.1038/s41598-020-64339-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Isaac V Manzanera Esteve
- Vanderbilt University Medical Center, Department Radiology and Radiological Sciences, Nashville, TN, USA.,Vanderbilt University Medical Center, Institute of Imaging Science, Nashville, TN, USA
| | - Angel F Farinas
- Vanderbilt University Medical Center, Department of Plastic Surgery, Nashville, TN, USA
| | - Alonda C Pollins
- Vanderbilt University Medical Center, Department of Plastic Surgery, Nashville, TN, USA
| | - Marlieke E Nussenbaum
- Vanderbilt University Medical Center, Department of Plastic Surgery, Nashville, TN, USA
| | - Nancy L Cardwell
- Vanderbilt University Medical Center, Department of Plastic Surgery, Nashville, TN, USA
| | - Hakmook Kang
- Vanderbilt University Medical Center, Department of Biostatistics, Nashville, TN, USA
| | - Mark D Does
- Vanderbilt University Medical Center, Department Radiology and Radiological Sciences, Nashville, TN, USA.,Vanderbilt University Medical Center, Institute of Imaging Science, Nashville, TN, USA.,Vanderbilt University, Department of Biomedical Engineering, Nashville, TN, USA
| | - Wesley P Thayer
- Vanderbilt University Medical Center, Department of Plastic Surgery, Nashville, TN, USA.,Vanderbilt University, Department of Biomedical Engineering, Nashville, TN, USA
| | - Richard D Dortch
- Vanderbilt University Medical Center, Department Radiology and Radiological Sciences, Nashville, TN, USA. .,Vanderbilt University Medical Center, Institute of Imaging Science, Nashville, TN, USA. .,Vanderbilt University, Department of Biomedical Engineering, Nashville, TN, USA.
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Farinas AF, Manzanera Esteve IV, Pollins AC, Cardwell NL, Does MD, Dortch RD, Thayer WP. Diffusion Tensor Tractrography Visualizes Partial Nerve Laceration Severity as Early as 1 Week After Surgical Repair in a Rat Model Ex Vivo. Mil Med 2020; 185:35-41. [PMID: 32074298 PMCID: PMC7029835 DOI: 10.1093/milmed/usz360] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 12/30/2022] Open
Abstract
BACKGROUND Previous studies in our laboratory have demonstrated that a magnetic resonance imaging method called diffusion tensor imaging (DTI) can differentiate between crush and complete transection peripheral nerve injuries in a rat model ex vivo. DTI measures the directionally dependent effect of tissue barriers on the random diffusion of water molecules. In ordered tissues such as nerves, this information can be used to reconstruct the primary direction of diffusion along fiber tracts, which may provide information on fiber tract continuity after nerve injury and surgical repair. METHODS Sprague-Dawley rats were treated with different degrees of partial transection of the sciatic nerve followed by immediate repair and euthanized after 1 week of recovery. Nerves were then harvested, fixed, and scanned with a 7 Tesla magnetic resonance imaging to obtain DTIand fiber tractography in each sample. Additional behavioral (sciatic function index, foot fault asymmetry) and histological (Toluidine blue staining) assessments were performed for validation. RESULTS Tractography yielded a visual representation of the degree of injury that correlated with behavioral and histological evaluations. CONCLUSIONS DTI tractography is a noninvasive tool that can yield a visual representation of a partial nerve transection as early as 1 week after surgical repair.
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Affiliation(s)
- Angel F Farinas
- Department of Plastic Surgery, Vanderbilt University Medical Center, 1161 21st Ave S, MCN D4207, Nashville, TN 37232-2345
| | - Isaac V Manzanera Esteve
- Department Radiology and Radiological Sciences, Vanderbilt University Medical Center, 1161 21st Ave S, MCN CC-1121, Nashville, TN 37232-2345
- The Department is the Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Vanderbilt University, Institute of Imaging Science, 1161 21st Ave S, MCN AA-1105, Nashville, TN 37232-2345
| | - Alonda C Pollins
- Department of Plastic Surgery, Vanderbilt University Medical Center, 1161 21st Ave S, MCN D4207, Nashville, TN 37232-2345
| | - Nancy L Cardwell
- Department of Plastic Surgery, Vanderbilt University Medical Center, 1161 21st Ave S, MCN D4207, Nashville, TN 37232-2345
| | - Mark D Does
- Department of Biomedical Engineering, Vanderbilt University, 2301 Vanderbilt Place PMB 351631, Nashville, TN 37235-1631
- Department Radiology and Radiological Sciences, Vanderbilt University Medical Center, 1161 21st Ave S, MCN CC-1121, Nashville, TN 37232-2345
- The Department is the Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Vanderbilt University, Institute of Imaging Science, 1161 21st Ave S, MCN AA-1105, Nashville, TN 37232-2345
| | - Richard D Dortch
- Department of Biomedical Engineering, Vanderbilt University, 2301 Vanderbilt Place PMB 351631, Nashville, TN 37235-1631
- Department Radiology and Radiological Sciences, Vanderbilt University Medical Center, 1161 21st Ave S, MCN CC-1121, Nashville, TN 37232-2345
- The Department is the Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Vanderbilt University, Institute of Imaging Science, 1161 21st Ave S, MCN AA-1105, Nashville, TN 37232-2345
| | - Wesley P Thayer
- Department of Plastic Surgery, Vanderbilt University Medical Center, 1161 21st Ave S, MCN D4207, Nashville, TN 37232-2345
- Department of Biomedical Engineering, Vanderbilt University, 2301 Vanderbilt Place PMB 351631, Nashville, TN 37235-1631
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10
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Manzanera Esteve IV, Farinas AF, Pollins AC, Nussenbaum ME, Cardwell NL, Kang H, Does MD, Thayer WP, Dortch RD. Probabilistic Assessment of Nerve Regeneration with Diffusion MRI in Rat Models of Peripheral Nerve Trauma. Sci Rep 2019; 9:19686. [PMID: 31873165 PMCID: PMC6928159 DOI: 10.1038/s41598-019-56215-2] [Citation(s) in RCA: 5] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 12/05/2019] [Indexed: 11/22/2022] Open
Abstract
Nerve regeneration after injury must occur in a timely fashion to restore function. Unfortunately, current methods (e.g., electrophysiology) provide limited information following trauma, resulting in delayed management and suboptimal outcomes. Herein, we evaluated the ability of diffusion MRI to monitor nerve regeneration after injury/repair. Sprague-Dawley rats were divided into three treatment groups (sham = 21, crush = 23, cut/repair = 19) and ex vivo diffusion tensor imaging (DTI) and diffusion kurtosis imaging (DKI) was performed 1-12 weeks post-surgery. Behavioral data showed a distinction between crush and cut/repair nerves at 4 weeks. This was consistent with DTI, which found that thresholds based on the ratio of radial and axial diffusivities (RD/AD = 0.40 ± 0.02) and fractional anisotropy (FA = 0.53 ± 0.01) differentiated crush from cut/repair injuries. By the 12th week, cut/repair nerves whose behavioral data indicated a partial recovery were below the RD/AD threshold (and above the FA threshold), while nerves that did not recover were on the opposite side of each threshold. Additional morphometric analysis indicated that DTI-derived normalized scalar indices report on axon density (RD/AD: r = -0.54, p < 1e-3; FA: r = 0.56, p < 1e-3). Interestingly, higher-order DKI analyses did not improve our ability classify recovery. These findings suggest that DTI may provide promising biomarkers for distinguishing successful/unsuccessful nerve repairs and potentially identify cases that require reoperation.
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Affiliation(s)
- Isaac V Manzanera Esteve
- Vanderbilt University Medical Center, Department Radiology and Radiological Sciences, Nashville, TN, USA
- Vanderbilt University Medical Center, Institute of Imaging Science, Nashville, TN, USA
| | - Angel F Farinas
- Vanderbilt University Medical Center, Department of Plastic Surgery, Nashville, TN, USA
| | - Alonda C Pollins
- Vanderbilt University Medical Center, Department of Plastic Surgery, Nashville, TN, USA
| | - Marlieke E Nussenbaum
- Vanderbilt University Medical Center, Department of Plastic Surgery, Nashville, TN, USA
| | - Nancy L Cardwell
- Vanderbilt University Medical Center, Department of Plastic Surgery, Nashville, TN, USA
| | - Hakmook Kang
- Vanderbilt University Medical Center, Department of Biostatistics, Nashville, TN, USA
| | - Mark D Does
- Vanderbilt University Medical Center, Department Radiology and Radiological Sciences, Nashville, TN, USA
- Vanderbilt University Medical Center, Institute of Imaging Science, Nashville, TN, USA
- Vanderbilt University, Department of Biomedical Engineering, Nashville, TN, USA
| | - Wesley P Thayer
- Vanderbilt University Medical Center, Department of Plastic Surgery, Nashville, TN, USA
- Vanderbilt University, Department of Biomedical Engineering, Nashville, TN, USA
| | - Richard D Dortch
- Vanderbilt University Medical Center, Department Radiology and Radiological Sciences, Nashville, TN, USA.
- Vanderbilt University Medical Center, Institute of Imaging Science, Nashville, TN, USA.
- Vanderbilt University, Department of Biomedical Engineering, Nashville, TN, USA.
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11
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Salnikov OG, Chukanov NV, Shchepin RV, Manzanera Esteve IV, Kovtunov KV, Koptyug IV, Chekmenev EY. Parahydrogen-Induced Polarization of 1- 13C-Acetates and 1- 13C-Pyruvates Using Sidearm Hydrogenation of Vinyl, Allyl, and Propargyl Esters. J Phys Chem C Nanomater Interfaces 2019; 123:12827-12840. [PMID: 31363383 PMCID: PMC6664436 DOI: 10.1021/acs.jpcc.9b02041] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
13C-hyperpolarized carboxylates, such as pyruvate and acetate, are emerging molecular contrast agents for MRI visualization of various diseases, including cancer. Here we present a systematic study of 1H and 13C parahydrogen-induced polarization of acetate and pyruvate esters with ethyl, propyl and allyl alcoholic moieties. It was found that allyl pyruvate is the most efficiently hyperpolarized compound from those under study, yielding 21% and 5.4% polarization of 1H and 13C nuclei, respectively, in CD3OD solutions. Allyl pyruvate and ethyl acetate were also hyperpolarized in aqueous phase using homogeneous hydrogenation with parahydrogen over water-soluble rhodium catalyst. 13C polarization of 0.82% and 2.1% was obtained for allyl pyruvate and ethyl acetate, respectively. 13C-hyperpolarized methanolic and aqueous solutions of allyl pyruvate and ethyl acetate were employed for in vitro MRI visualization, demonstrating the prospects for translation of the presented approach to biomedical in vivo studies.
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Affiliation(s)
- Oleg G. Salnikov
- International Tomography Center SB RAS, Institutskaya
Street 3A, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogova Street 2,
Novosibirsk 630090, Russia
| | - Nikita V. Chukanov
- International Tomography Center SB RAS, Institutskaya
Street 3A, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogova Street 2,
Novosibirsk 630090, Russia
| | - Roman V. Shchepin
- Vanderbilt University Institute of Imaging Science (VUIIS),
Vanderbilt University, Nashville, Tennessee 37232-2310, United States
- Department of Radiology, Vanderbilt University, Nashville,
Tennessee 37232-2310, United States
| | - Isaac V. Manzanera Esteve
- Vanderbilt University Institute of Imaging Science (VUIIS),
Vanderbilt University, Nashville, Tennessee 37232-2310, United States
- Department of Radiology, Vanderbilt University, Nashville,
Tennessee 37232-2310, United States
| | - Kirill V. Kovtunov
- International Tomography Center SB RAS, Institutskaya
Street 3A, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogova Street 2,
Novosibirsk 630090, Russia
| | - Igor V. Koptyug
- International Tomography Center SB RAS, Institutskaya
Street 3A, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogova Street 2,
Novosibirsk 630090, Russia
| | - Eduard Y. Chekmenev
- Vanderbilt University Institute of Imaging Science (VUIIS),
Vanderbilt University, Nashville, Tennessee 37232-2310, United States
- Department of Radiology, Vanderbilt University, Nashville,
Tennessee 37232-2310, United States
- Department of Biomedical Engineering, and Vanderbilt
University, Nashville, Tennessee 37232-2310, United States
- Vanderbilt-Ingram Cancer Center (VICC), Vanderbilt
University, Nashville, Tennessee 37232-2310, United States
- Department of Chemistry, Integrative Biosciences (Ibio),
Wayne State University, Karmanos Cancer Institute (KCI), Detroit, Michigan 48202,
United States
- Russian Academy of Sciences, Leninskiy Prospekt 14, Moscow
119991, Russia
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12
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Farinas AF, Pollins AC, Stephanides M, O’Neill D, Al-Kassis S, Esteve IVM, Colazo JM, Keller PR, Rankin T, Wormer BA, Kaoutzanis C, Dortch RD, Thayer WP. Diffusion tensor tractography to visualize axonal outgrowth and regeneration in a 4-cm reverse autograft sciatic nerve rabbit injury model. Neurol Res 2019; 41:257-264. [PMID: 30582740 PMCID: PMC6435384 DOI: 10.1080/01616412.2018.1554284] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 10/31/2018] [Accepted: 11/24/2018] [Indexed: 01/20/2023]
Abstract
BACKGROUND Diffusion tensor tractography (DTT) has recently been shown to accurately detect nerve injury and regeneration. This study assesses whether 7-tesla (7T) DTT imaging is a viable modality to observe axonal outgrowth in a 4 cm rabbit sciatic nerve injury model fixed by a reverse autograft (RA) surgical technique. METHODS Transection injury of unilateral sciatic nerve (4 cm long) was performed in 25 rabbits and repaired using a RA surgical technique. Analysis of the nerve autograft was performed at 3, 6, and 11 weeks postoperatively and compared to normal contralateral sciatic nerve, used as control group. High-resolution DTT from ex vivo sciatic nerves were obtained using 3D diffusion-weighted spin-echo acquisitions at 7-T. Total axons and motor and sensory axons were counted at defined lengths along the graft. RESULTS At 11 weeks, histologically, the total axon count of the RA group was equivalent to the contralateral uninjured nerve control group. Similarly, by qualitative DTT visualization, the 11-week RA group showed increased fiber tracts compared to the 3 and 6 weeks counterparts. Upon immunohistochemical evaluation, 11-week motor axon counts did not significantly differ between RA and control; but significantly decreased sensory axon counts remained. Nerves explanted at 3 weeks and 6 weeks showed decreased motor and sensory axon counts. DISCUSSION 7-T DTT is an effective imaging modality that may be used qualitatively to visualize axonal outgrowth and regeneration. This has implications for the development of technology that non-invasively monitors peripheral nerve regeneration in a variety of clinical settings.
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Affiliation(s)
- Angel F. Farinas
- Vanderbilt University Medical Center, Department of Plastic
Surgery, Nashville, TN
| | - Alonda C. Pollins
- Vanderbilt University Medical Center, Department of Plastic
Surgery, Nashville, TN
| | | | - Dillon O’Neill
- University of Utah, Department of Orthopedics, Salt Lake
City, UT
| | - Salam Al-Kassis
- Vanderbilt University Medical Center, Department of Plastic
Surgery, Nashville, TN
| | - Isaac V. Manzanera Esteve
- Vanderbilt University Medical Center, Department Radiology
and Radiological Sciences, Nashville, TN
- Vanderbilt University Medical Center, Institute of Imaging
Science, Nashville, TN
| | | | | | - Timothy Rankin
- Vanderbilt University Medical Center, Department of Plastic
Surgery, Nashville, TN
| | - Blair A. Wormer
- Vanderbilt University Medical Center, Department of Plastic
Surgery, Nashville, TN
| | | | - Richard D. Dortch
- Vanderbilt University, Department of Biomedical
Engineering, Nashville, TN
- Vanderbilt University Medical Center, Department Radiology
and Radiological Sciences, Nashville, TN
- Vanderbilt University Medical Center, Institute of Imaging
Science, Nashville, TN
| | - Wesley P. Thayer
- Vanderbilt University Medical Center, Department of Plastic
Surgery, Nashville, TN
- Vanderbilt University, Department of Biomedical
Engineering, Nashville, TN
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13
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Shchepin RV, Barskiy DA, Coffey AM, Manzanera Esteve IV, Chekmenev EY. Efficient Synthesis of Molecular Precursors for Para-Hydrogen-Induced Polarization of Ethyl Acetate-1-(13) C and Beyond. Angew Chem Int Ed Engl 2016; 55:6071-4. [PMID: 27061815 DOI: 10.1002/anie.201600521] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [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: 01/18/2016] [Revised: 02/18/2016] [Indexed: 12/15/2022]
Abstract
A scalable and versatile methodology for production of vinylated carboxylic compounds with (13) C isotopic label in C1 position is described. It allowed synthesis of vinyl acetate-1-(13) C, which is a precursor for preparation of (13) C hyperpolarized ethyl acetate-1-(13) C, which provides a convenient vehicle for potential in vivo delivery of hyperpolarized acetate to probe metabolism in living organisms. Kinetics of vinyl acetate molecular hydrogenation and polarization transfer from para-hydrogen to (13) C via magnetic field cycling were investigated. Nascent proton nuclear spin polarization (%PH ) of ca. 3.3 % and carbon-13 polarization (%P13C ) of ca. 1.8 % were achieved in ethyl acetate utilizing 50 % para-hydrogen corresponding to ca. 50 % polarization transfer efficiency. The use of nearly 100% para-hydrogen and the improvements of %PH of para-hydrogen-nascent protons may enable production of (13) C hyperpolarized contrast agents with %P13C of 20-50 % in seconds using this chemistry.
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Affiliation(s)
- Roman V Shchepin
- Department of Radiology, Vanderbilt University Institute of Imaging Science (VUIIS), Department of Biomedical Engineering, Vanderbilt-Ingram Cancer Center (VICC), Vanderbilt University, Nashville, TN, 37232, USA
| | - Danila A Barskiy
- Department of Radiology, Vanderbilt University Institute of Imaging Science (VUIIS), Department of Biomedical Engineering, Vanderbilt-Ingram Cancer Center (VICC), Vanderbilt University, Nashville, TN, 37232, USA
| | - Aaron M Coffey
- Department of Radiology, Vanderbilt University Institute of Imaging Science (VUIIS), Department of Biomedical Engineering, Vanderbilt-Ingram Cancer Center (VICC), Vanderbilt University, Nashville, TN, 37232, USA
| | - Isaac V Manzanera Esteve
- Department of Radiology, Vanderbilt University Institute of Imaging Science (VUIIS), Department of Biomedical Engineering, Vanderbilt-Ingram Cancer Center (VICC), Vanderbilt University, Nashville, TN, 37232, USA
| | - Eduard Y Chekmenev
- Department of Radiology, Vanderbilt University Institute of Imaging Science (VUIIS), Department of Biomedical Engineering, Vanderbilt-Ingram Cancer Center (VICC), Vanderbilt University, Nashville, TN, 37232, USA. .,Russian Academy of Sciences, 119991, Moscow, Russia.
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