1
|
DSouza AA, Kulkarni P, Ferris CF, Amiji MM, Bleier BS. Mild repetitive TBI reduces brain-derived neurotrophic factor (BDNF) in the substantia nigra and hippocampus: A preclinical model for testing BDNF-targeted therapeutics. Exp Neurol 2024; 374:114696. [PMID: 38244886 PMCID: PMC10922982 DOI: 10.1016/j.expneurol.2024.114696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 01/05/2024] [Accepted: 01/18/2024] [Indexed: 01/22/2024]
Abstract
Clinical studies have consistently shown that neurodegenerative diseases (NDs) such as Parkinson's disease, Alzheimer's disease, Amyotrophic Lateral Sclerosis, and Huntington's disease show absent or low levels of brain-derived neurotrophic factor (BDNF). Despite this relationship between BDNF and ND, only a few ND animal models have been able to recapitulate the low BDNF state, thereby hindering research into the therapeutic targeting of this important neurotrophic factor. In order to address this unmet need, we sought to develop a reproducible model of BDNF reduction by inducing traumatic brain injury (TBI) using a closed head momentum exchange injury model in mature 9-month-old male and female rats. Head impacts were repetitive and varied in intensity from mild to severe. BDNF levels, as assessed by ELISA, were significantly reduced in the hippocampus of both males and females as well as in the substantia nigra of males 12 days after mild TBI. However, we observed significant sexual dimorphism in multiple sequelae, including magnetic resonance imaging-determined vasogenic edema, astrogliosis (GFAP-activation), and microgliosis (Iba1 activation). This study provides an opportunity to investigate the mechanism of BDNF reduction in rodent models and provides a reliable paradigm to test BDNF-targeted therapeutics for the treatment of ND.
Collapse
Affiliation(s)
- Anisha A DSouza
- Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA 02114, USA; Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, Northeastern University, Boston, MA 02115, USA
| | - Praveen Kulkarni
- Center for Translational NeuroImaging, Northeastern University, Boston, MA 02115, USA
| | - Craig F Ferris
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, Northeastern University, Boston, MA 02115, USA; Center for Translational NeuroImaging, Northeastern University, Boston, MA 02115, USA
| | - Mansoor M Amiji
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, Northeastern University, Boston, MA 02115, USA; Department of Chemical Engineering, College of Engineering, Northeastern University, Boston, MA 02115, USA
| | - Benjamin S Bleier
- Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA 02114, USA.
| |
Collapse
|
2
|
Bujala N, Jain V, Rees JH, Chuquilin M. MRI Brain Changes During Acute Stroke-Like Episode in Charcot-Marie-Tooth Disease. Neurohospitalist 2023; 13:321-322. [PMID: 37441218 PMCID: PMC10334055 DOI: 10.1177/19418744231173173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/15/2023] Open
Affiliation(s)
| | - Varun Jain
- Department of Neurology, University of Florida, Gainesville, FL, USA
| | - John H Rees
- Department of Neuroradiology, University of Florida, Gainesville, FL, USA
| | - Miguel Chuquilin
- Department of Neurology, University of Florida, Gainesville, FL, USA
| |
Collapse
|
3
|
Salari M, Etemadifar M, Ashourizadeh H. Diffuse subcortical white matter restriction: An uncommon finding on metronidazole toxicity. Neuroradiol J 2023; 36:119-124. [PMID: 35850612 PMCID: PMC9893164 DOI: 10.1177/19714009221111087] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Metronidazole is a common and widely used antibiotic to treat a wide range of infectious diseases and has been associated with serious neurologic disturbances which in some cases were irreversible. We present a metronidazole-induced encephalopathy in a 19-year-old girl after 7 days of metronidazole treatment, with diffusion restricted subcortical white matter lesions along with the corpus callosum involvements. Diverse clinical presentation of a serious neurologic disturbance caused by a common widely used antibiotic should be carefully addressed in the setting of both short- and long-term treatment.
Collapse
Affiliation(s)
- Mehri Salari
- Functional Neurosurgery Research
Center, Shohada Tajrish Neurosurgical Center of Excellence, Shahid Beheshti University of Medical
Sciences, Tehran, Iran
| | - Masoud Etemadifar
- Department of Functional
Neurosurgery, Medical School, Isfahan University of Medical
Science, Isfahan, Iran
| | - Helia Ashourizadeh
- Functional Neurosurgery Research
Center, Shohada Tajrish Neurosurgical Center of Excellence, Shahid Beheshti University of Medical
Sciences, Tehran, Iran
| |
Collapse
|
4
|
Meyers SP. Intracranial Abnormalities with Diffusion Restriction. Magn Reson Imaging Clin N Am 2021; 29:137-161. [PMID: 33902900 DOI: 10.1016/j.mric.2021.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Multiple pathologic conditions can cause changes in the random movement of water, which can be detected with diffusion-weighted imaging (DWI). DWI plays a powerful clinical role in detecting restricted diffusion associated with acute brain infarction. Other disorders can also result in restricted diffusion. This article focuses on showing examples of common and uncommon disorders that have restricted diffusion secondary to cytotoxic and/or intramyelinic edema. These disorders include ischemia, infection, noninfectious demyelinating diseases, genetic mutations affecting metabolism, acquired metabolic disorders, toxic or drug exposures, neoplasms and tumorlike lesions, radiation treatment, trauma, and denervation.
Collapse
Affiliation(s)
- Steven P Meyers
- Department of Radiology/Imaging Sciences, University of Rochester Medical Center, University Medical Imaging, 4901 Lac de Ville Boulevard, Building D - Suite 140, Rochester, NY 14618, USA.
| |
Collapse
|
5
|
TASHIRO R, FUJIMURA M, NISHIZAWA T, SAITO A, TOMINAGA T. Cerebral Hyperperfusion and Concomitant Reversible Lesion at the Splenium after Direct Revascularization Surgery for Adult Moyamoya Disease: Possible Involvement of MERS and Watershed Shift Phenomenon. NMC Case Rep J 2021; 8:451-456. [PMID: 35079503 PMCID: PMC8769435 DOI: 10.2176/nmccrj.cr.2020-0337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 01/13/2021] [Indexed: 11/20/2022] Open
Abstract
Superficial temporal artery (STA)–middle cerebral artery (MCA) bypass is the standard surgical treatment for moyamoya disease (MMD). Local cerebral hyperperfusion (CHP) is one of the potential complications, which could enhance intrinsic inflammation and oxidative stress in MMD patients and accompany concomitant watershed shift (WS) phenomenon, defined as the paradoxical decrease in the cerebral blood flow (CBF) near the site of CHP. However, CHP and simultaneous remote reversible lesion at the splenium have never been reported. A 22-year-old man with ischemic-onset MMD underwent left STA–MCA bypass. Although asymptomatic, local CHP and a paradoxical CBF decrease at the splenium were evident on N-isopropyl-p-[123I] iodoamphetamine single-photon emission computed tomography 1 day after surgery. The patient was maintained under strict blood pressure control, but he subsequently developed transient delirium 4 days after surgery. MRI revealed a high-signal-intensity lesion with a low apparent diffusion coefficient at the splenium. After continued intensive management, the splenial lesion disappeared 14 days after surgery. The patient was discharged without neurological deficits. Catheter angiography 2 months later confirmed marked regression of posterior-to-anterior collaterals via the posterior pericallosal artery, suggesting dynamic watershed shift between blood flow supplies from the posterior and anterior circulation. Mild encephalitis/encephalopathy with a reversible splenial lesion could explain the pathophysiology of the postoperative splenial lesion in this case, which is associated with generation of oxidative stress, enhanced inflammation, and metabolic abnormalities. Rapid postoperative hemodynamic changes, including local CHP and concomitant WS phenomenon, might participate in the formation of the splenial lesion.
Collapse
Affiliation(s)
- Ryosuke TASHIRO
- Department of Neurosurgery, Kohnan Hospital, Sendai, Miyagi, Japan
| | - Miki FUJIMURA
- Department of Neurosurgery, Kohnan Hospital, Sendai, Miyagi, Japan
| | - Taketo NISHIZAWA
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Atsushi SAITO
- Department of Neurosurgery, Kohnan Hospital, Sendai, Miyagi, Japan
| | - Teiji TOMINAGA
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| |
Collapse
|
6
|
Bhat SS, Poojar P, Padma CR, Ananth RK, Hanumantharaju MC, Geethanath S. Deep Learning-Based Denoising for High b-Value at 2000 s/mm2 Diffusion-Weighted Imaging. Crit Rev Biomed Eng 2021; 49:1-10. [PMID: 35993947 DOI: 10.1615/critrevbiomedeng.2022040279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Diffusion-weighted imaging (DWI) allows white matter quantification of the white matter tracts of the brain. However, at a high b-value (≥ 2000 s/mm2), DWI acquisition suffers from noise due to longer acquisition times obscuring white matter interpretation. DWI denoising techniques can be used to acquire high b-value DWI without increasing the number of signal averages. We used a residual learning-based convolutional neural network (DnCNN) to reduce noise in high b-value DWI based on the literature review. We applied the proposed denoising method on high b-value, retrospectively collected DWI data with multiple noise levels. Experimental results show an improved image quality after denoising in retrospective DWI (average PSNR before and after denoising: 27.63 ± 1.06 dB and 51.76 ± 1.95 dB, respectively). The prospective DWI included one and two signal averages for denoising. DWI with four signal averages was used as the reference. Representative images show high b-value prospective DW images denoised using the DnCNN. We demonstrated DnCNN for cases of multiple noise levels and signal averages. For the prospective study, the PSNR values for 1-NEX before and after denoising were 27.39 ± 3.75 dB and 27.68 ± 3.75 dB. For 2-NEX, the PSNR values before and after denoising were 27.51 ± 4.18 dB and 27.75 ± 4.05 dB.
Collapse
Affiliation(s)
- Seema S Bhat
- Department of Information Science and Engineering, Dayananda Sagar College of Engineering, Bengaluru, India
| | - Pavan Poojar
- Columbia University, New York, NY, USA; Department of Medical Electronics Engineering, Dayananda Sagar College of Engineering, Bengaluru, India
| | - Chennagiri Rajarao Padma
- Medical Imaging Research Center (MIRC), Department of Medical Electronics Engineering, Dayananda Sagar College of Engineering, Bengaluru, India
| | | | - M C Hanumantharaju
- Department of Electronics and Communication Engineering, BMS Institute of Technology Management, Bengaluru 560064, India
| | - Sairam Geethanath
- Medical Imaging Research Center (MIRC), Department of Medical Electronics, Dayananda Sagar College of Engineering, Bengaluru, India; Magnetic Resonance Research Center, Columbia University, New York, NY 10027
| |
Collapse
|
7
|
Liang Y, Liu J, Cheng D, Wu Y, Mo L, Huang W. Recurrent episodes of reversible posterior leukoencephalopathy in three Chinese families with GJB1 mutations in X-linked Charcot-Marie-tooth type 1 disease: cases report. BMC Neurol 2019; 19:325. [PMID: 31842800 PMCID: PMC6912941 DOI: 10.1186/s12883-019-1563-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 12/09/2019] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND The X-linked form of Charcot-Marie-Tooth disease type 1 (CMTX1) is an inherited peripheral neuropathy that arises in patients with mutations in the gap-junction beta-1 gene (GJB1). CASE PRESENTATION Three young male patients from Southern China with pes cavus experienced multiple episodes of transient central nervous system (CNS) dysfunction. Three patients all had reversible posterior leukoencephalopathy as detected by brain diffusion-weighted magnetic resonance imaging (MRI-DWI). Nerve conduction velocity (NCV) showed sensorimotor polyneuropathy with mixed demyelinating and axonal features. Genetic testing indicated a c.425G > A (p.Arg142Glu) or c.563 C > T (p.Thr188Ile) or c.103G > C (p.Val35Leu) mutation in GJB1. The unique feature of this report is the identification of two novel mutations: c.563 C > T and sc.103G > C of the GJB1 gene detected in two families respectively. Another unique feature is that peripheral neuropathy symptoms in the three patients were insidious and found at the onset of CNS symptoms. CONCLUSIONS Posterior leukoencephalopathy is involved in CMTX1 patients. The white matter changes in MRI of CMTX1 patients are reversible and recover later than CNS symptoms.
Collapse
Affiliation(s)
- Youlong Liang
- Department of Neurology, First Affiliated Hospital, Guangxi Medical University, #6 Shuangyong Road, Nanning, Guangxi, People's Republic of China, 530021
| | - Jingli Liu
- Department of Neurology, First Affiliated Hospital, Guangxi Medical University, #6 Shuangyong Road, Nanning, Guangxi, People's Republic of China, 530021
| | - Daobin Cheng
- Department of Neurology, First Affiliated Hospital, Guangxi Medical University, #6 Shuangyong Road, Nanning, Guangxi, People's Republic of China, 530021
| | - Yu Wu
- Department of Neurology, First Affiliated Hospital, Guangxi Medical University, #6 Shuangyong Road, Nanning, Guangxi, People's Republic of China, 530021
| | - Liuhong Mo
- Department of Neurology, First Affiliated Hospital, Guangxi Medical University, #6 Shuangyong Road, Nanning, Guangxi, People's Republic of China, 530021
| | - Wen Huang
- Department of Neurology, First Affiliated Hospital, Guangxi Medical University, #6 Shuangyong Road, Nanning, Guangxi, People's Republic of China, 530021.
| |
Collapse
|
8
|
Post-ischemic Leukoencephalopathy after Endovascular Treatment for Acute Ischemic Stroke. Can J Neurol Sci 2019; 46:363-365. [PMID: 31084669 DOI: 10.1017/cjn.2019.30] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
9
|
Mankad K, Talenti G, Tan AP, Gonçalves FG, Robles C, Kan EYL, Siddiqui A. Neurometabolic Disorders of the Newborn. Top Magn Reson Imaging 2018; 27:179-196. [PMID: 30086107 DOI: 10.1097/rmr.0000000000000176] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
There is an extensive and diverse set of medical conditions affecting the neonatal brain within the spectrum of neurometabolic disorders. As such, their clinical presentations can be rather nonspecific, and can often mimic acquired entities such as hypoxic-ischemic encephalopathy and sepsis. Similarly, the radiological findings in these entities can also be frequently nonspecific, but a more detailed analysis of imaging findings (especially magnetic resonance imaging) alongside the relevant clinical details can be a rewarding experience, thus enabling a timely and targeted diagnosis. Early diagnosis of an underlying neurometabolic disorder is vital, as some of these entities are potentially treatable, and laboratory and genetic testing can be precisely targeted. Further, their detection helps with counselling families for future pregnancies. We present a review of neurometabolic disorders specific to the newborns with a focus on how neuroimaging findings match their clinical presentation patterns.
Collapse
Affiliation(s)
- Kshitij Mankad
- Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | | | - Ai Peng Tan
- Department of Diagnostic Imaging, National University Health System, Singapore, Singapore
| | | | - Carlos Robles
- Department of Radiology, Hospital Clinico Universidad de Chile, Región Metropolitana, Chile
| | - Elaine Y L Kan
- Department of Radiology, Hong Kong Children's Hospital, Kai Tak, Hong Kong
| | - Ata Siddiqui
- Department of Neuroradiology, King's College Hospital, London, UK
| |
Collapse
|
10
|
Abbott AL, Silvestrini M, Topakian R, Golledge J, Brunser AM, de Borst GJ, Harbaugh RE, Doubal FN, Rundek T, Thapar A, Davies AH, Kam A, Wardlaw JM. Optimizing the Definitions of Stroke, Transient Ischemic Attack, and Infarction for Research and Application in Clinical Practice. Front Neurol 2017; 8:537. [PMID: 29104559 PMCID: PMC5654955 DOI: 10.3389/fneur.2017.00537] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 09/25/2017] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND AND PURPOSE Until now, stroke and transient ischemic attack (TIA) have been clinically based terms which describe the presence and duration of characteristic neurological deficits attributable to intrinsic disorders of particular arteries supplying the brain, retina, or (sometimes) the spinal cord. Further, infarction has been pathologically defined as death of neural tissue due to reduced blood supply. Recently, it has been proposed we shift to definitions of stroke and TIA determined by neuroimaging results alone and that neuroimaging findings be equated with infarction. METHODS We examined the scientific validity and clinical implications of these proposals using the existing published literature and our own experience in research and clinical practice. RESULTS We found that the proposals to change to imaging-dominant definitions, as published, are ambiguous and inconsistent. Therefore, they cannot provide the standardization required in research or its application in clinical practice. Further, we found that the proposals are scientifically incorrect because neuroimaging findings do not always correlate with the clinical status or the presence of infarction. In addition, we found that attempts to use the proposals are disrupting research, are otherwise clinically unhelpful and do not solve the problems they were proposed to solve. CONCLUSION We advise that the proposals must not be accepted. In particular, we explain why the clinical focus of the definitions of stroke and TIA should be retained with continued sub-classification of these syndromes depending neuroimaging results (with or without other information) and that infarction should remain a pathological term. We outline ways the established clinically based definitions of stroke and TIA, and use of them, may be improved to encourage better patient outcomes in the modern era.
Collapse
Affiliation(s)
- Anne L. Abbott
- Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, VIC, Australia
- The Neurology Department, The Alfred Hospital, Melbourne, VIC, Australia
| | | | - Raffi Topakian
- Department of Neurology, Academic Teaching Hospital Wels-Grieskirchen, Wels, Austria
| | - Jonathan Golledge
- Queensland Research Centre for Peripheral Vascular Disease, College of Medicine and Dentistry, James Cook University, Townsville, QLD, Australia
- Department of Vascular and Endovascular Surgery, The Townsville Hospital, Townsville, QLD, Australia
| | - Alejandro M. Brunser
- Cerebrovascular Program, Neurology Service, Department of Medicine, Clínica Alemana de Santiago, Facultad de Medicina Clínica Alemana – Universidad del Desarrollo, Santiago, Chile
| | - Gert J. de Borst
- Department of Vascular Surgery, University Medical Centre of Utrecht, Utrecht, Netherlands
| | - Robert E. Harbaugh
- Department of Neurosurgery, Penn State University, State College, PA, United States
| | - Fergus N. Doubal
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
- Department of Medicine, Elderly Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
| | - Tatjana Rundek
- Department of Neurology, Miller School of Medicine, Miami, FL, United States
| | - Ankur Thapar
- Imperial College Healthcare NHS Trust, London, United Kingdom
- Imperial College, London, United Kingdom
| | - Alun H. Davies
- Academic Section of Vascular Surgery, Department of Surgery and Cancer, Imperial College School of Medicine, Charing Cross Hospital, London, United Kingdom
| | - Anthony Kam
- Department of Radiology, Alfred Health, Melbourne, VIC, Australia
| | - Joanna M. Wardlaw
- Division of Neuroimaging Sciences, Centre for Clinical Brain Sciences, UK Dementia Research Institute at the University of Edinburgh, Edinburgh, United Kingdom
| |
Collapse
|
11
|
Hood A, Rutlin J, Shimony JS, Grange DK, White DA. Brain White Matter Integrity Mediates the Relationship Between Phenylalanine Control and Executive Abilities in Children with Phenylketonuria. JIMD Rep 2016; 33:41-47. [PMID: 27450369 DOI: 10.1007/8904_2016_579] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 05/26/2016] [Accepted: 06/13/2016] [Indexed: 12/03/2022] Open
Abstract
We tested the hypothesis that brain white matter integrity mediates the relationship between phenylalanine (Phe) control and executive abilities in children with phenylketonuria (PKU; N = 36). To do so, we examined mean diffusivity (MD) from diffusion tensor imaging (DTI) in two white matter brain regions (posterior parietal-occipital, PPO; centrum semiovale, CSO) and lifetime phenylalanine (Phe) exposure; the executive abilities examined included verbal strategic processing, nonverbal strategic processing, and working memory. Mediation modeling showed that MD in the PPO and CSO mediated the relationship between Phe exposure and nonverbal strategic processing, MD in the CSO mediated the relationship between Phe exposure and verbal strategic processing, and MD in the PPO mediated the relationship between Phe exposure and working memory. These exploratory findings demonstrate the importance of using sophisticated modeling procedures to understand the interplay among metabolic control, neural factors, and functional outcomes in individuals with PKU.
Collapse
Affiliation(s)
- Anna Hood
- Department of Psychological and Brain Sciences, Washington University, Campus Box 1125, St. Louis, MO, 63130, USA.
| | - Jerrel Rutlin
- Department of Psychiatry, Washington University, Campus Box 8134, St. Louis, MO, 63110, USA
| | - Joshua S Shimony
- Mallinckrodt Institute of Radiology, Washington University, Campus Box 8131, St. Louis, MO, 63110, USA
| | - Dorothy K Grange
- Department of Pediatrics, Washington University, Campus Box 8116, St. Louis, MO, 63110, USA
| | - Desiree A White
- Department of Psychological and Brain Sciences, Washington University, Campus Box 1125, St. Louis, MO, 63130, USA.,Department of Pediatrics, Washington University, Campus Box 8116, St. Louis, MO, 63110, USA
| |
Collapse
|
12
|
Hood A, Antenor-Dorsey JAV, Rutlin J, Hershey T, Shimony JS, McKinstry RC, Grange DK, Christ SE, Steiner R, White DA. Prolonged exposure to high and variable phenylalanine levels over the lifetime predicts brain white matter integrity in children with phenylketonuria. Mol Genet Metab 2015; 114:19-24. [PMID: 25481106 PMCID: PMC4277899 DOI: 10.1016/j.ymgme.2014.11.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 11/04/2014] [Accepted: 11/06/2014] [Indexed: 10/24/2022]
Abstract
In this study, we retrospectively examined the microstructural white matter integrity of children with early- and continuously-treated PKU (N=36) in relation to multiple indices of phenylalanine (Phe) control over the lifetime. White matter integrity was assessed using mean diffusivity (MD) from diffusion tensor imaging (DTI). Eight lifetime indices of Phe control were computed to reflect average Phe (mean, index of dietary control), variability in Phe (standard deviation, standard error of estimate, % spikes), change in Phe with age (slope), and prolonged exposure to Phe (mean exposure, standard deviation exposure). Of these indices, mean Phe, mean exposure, and standard deviation exposure were the most powerful predictors of widespread microstructural white matter integrity compromise. Findings from the two previously unexamined exposure indices reflected the accumulative effects of elevations and variability in Phe. Given that prolonged exposure to elevated and variable Phe was particularly detrimental to white matter integrity, Phe should be carefully monitored and controlled throughout childhood, without liberalization of Phe control as children with PKU age.
Collapse
Affiliation(s)
- Anna Hood
- Department of Psychology, Washington University, Campus Box 1125, St. Louis, MO 63130, USA
| | - Jo Ann V Antenor-Dorsey
- Department of Psychiatry, Washington University School of Medicine, Campus Box 8134, St. Louis, MO 63110, USA
| | - Jerrel Rutlin
- Department of Psychiatry, Washington University School of Medicine, Campus Box 8134, St. Louis, MO 63110, USA
| | - Tamara Hershey
- Department of Psychiatry, Washington University School of Medicine, Campus Box 8134, St. Louis, MO 63110, USA; Mallinckrodt Institute of Radiology, Washington University School of Medicine, Campus Box 8131, St. Louis, MO 63110, USA; Department of Neurology, Washington University School of Medicine, Campus Box 8111, St. Louis, MO 63110, USA
| | - Joshua S Shimony
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, Campus Box 8131, St. Louis, MO 63110, USA
| | - Robert C McKinstry
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, Campus Box 8131, St. Louis, MO 63110, USA; Department of Pediatrics, Washington University School of Medicine, Campus Box 8116, St. Louis, MO 63110, USA
| | - Dorothy K Grange
- Department of Pediatrics, Washington University School of Medicine, Campus Box 8116, St. Louis, MO 63110, USA
| | - Shawn E Christ
- Department of Psychological Sciences, University of Missouri, 210 McAlester Hall, Columbia, MO 65211, USA
| | - Robert Steiner
- Department of Pediatrics, Institute on Development and Disability, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR, 97239 USA; Department of Molecular & Medical Genetics, Institute on Development and Disability, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, USA
| | - Desiree A White
- Department of Psychology, Washington University, Campus Box 1125, St. Louis, MO 63130, USA.
| |
Collapse
|
13
|
Camara-Lemarroy CR, Flores-Cantu H, Gonzalez-Velazquez CD, Calderon-Hernandez HJ, Mendoza-Garcia AG, Villareal-Velazquez HJ. Bilateral cytotoxic edema of the centrum semiovale in uremic encephalopathy. J Neurol Sci 2014; 345:260-1. [PMID: 25060419 DOI: 10.1016/j.jns.2014.07.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 07/04/2014] [Accepted: 07/08/2014] [Indexed: 11/16/2022]
Affiliation(s)
- Carlos R Camara-Lemarroy
- Servicio de Neurologia, Hospital Universitario "Dr. José E. González", Universidad Autónoma de Nuevo León, Madero y Gonzalitos S/N, Monterrey, NL 64460, Mexico.
| | - Hazael Flores-Cantu
- Servicio de Neurologia, Hospital Universitario "Dr. José E. González", Universidad Autónoma de Nuevo León, Madero y Gonzalitos S/N, Monterrey, NL 64460, Mexico
| | - Camilo D Gonzalez-Velazquez
- Servicio de Neurologia, Hospital Universitario "Dr. José E. González", Universidad Autónoma de Nuevo León, Madero y Gonzalitos S/N, Monterrey, NL 64460, Mexico
| | - Hector J Calderon-Hernandez
- Servicio de Neurologia, Hospital Universitario "Dr. José E. González", Universidad Autónoma de Nuevo León, Madero y Gonzalitos S/N, Monterrey, NL 64460, Mexico
| | - Alejandra G Mendoza-Garcia
- Servicio de Neurologia, Hospital Universitario "Dr. José E. González", Universidad Autónoma de Nuevo León, Madero y Gonzalitos S/N, Monterrey, NL 64460, Mexico
| | - Hector J Villareal-Velazquez
- Servicio de Neurologia, Hospital Universitario "Dr. José E. González", Universidad Autónoma de Nuevo León, Madero y Gonzalitos S/N, Monterrey, NL 64460, Mexico
| |
Collapse
|
14
|
Congenital and acquired abnormalities of the corpus callosum: a pictorial essay. BIOMED RESEARCH INTERNATIONAL 2013; 2013:265619. [PMID: 24027754 PMCID: PMC3763572 DOI: 10.1155/2013/265619] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Revised: 06/16/2013] [Accepted: 07/12/2013] [Indexed: 01/05/2023]
Abstract
The purpose of this review is to illustrate the wide spectrum of lesions in the corpus callosum, both congenital and acquired: developmental abnormalities, phakomatoses, neurometabolic disorders, demyelinating diseases, infection and inflammation, vascular lesions, neoplasms, traumatic and iatrogenic injury, and others. Cases include fetuses, children, and adults with rich iconography from the authors' own archive.
Collapse
|