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Tomoto T, Lu M, Khan AM, Liu J, Pasha EP, Tarumi T, Zhang R. Cerebral blood flow and cerebrovascular resistance across the adult lifespan: A multimodality approach. J Cereb Blood Flow Metab 2023; 43:962-976. [PMID: 36708213 PMCID: PMC10196748 DOI: 10.1177/0271678x231153741] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 12/01/2022] [Accepted: 12/23/2022] [Indexed: 01/29/2023]
Abstract
Cerebral blood flow (CBF) decreases across the adult lifespan; however, more studies are needed to understand the underlying mechanisms. This study measured CBF and cerebrovascular resistance (CVR) using a multimodality approach in 185 healthy adults (21-80 years). Color-coded duplex ultrasonography and phase-contrast MRI were used to measure CBF, CBF velocity, and vessel diameters of the internal carotid (ICA) and vertebral arteries (VA). MRI arterial spin labeling was used to measure brain perfusion. Transcranial Doppler was used to measure CBF velocity at the middle cerebral artery. Structural MRI was used to measure brain volume. CBF was presented as total blood flow (mL/min) and normalized CBF (nCBF, mL/100g/min). Mean arterial pressure was measured to calculate CVR. Age was associated with decreased CBF by ∼3.5 mL/min/year and nCBF by ∼0.19 mL/100g/min/year across the methods. CVR increased by ∼0.011 mmHg/mL/100g/min/year. Blood flow velocities in ICA and VA decreased with age ranging from 0.07-0.15 cm/s/year, while the vessel diameters remained similar among age groups. These findings suggest that age-related decreases in CBF can be attributed mainly to decreases in blood flow velocity in the large cerebral arteries and that increased CVR likely reflects the presence of cerebral vasoconstrictions in the small cerebral arterioles and/or capillaries.
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Affiliation(s)
- Tsubasa Tomoto
- Institute for Exercise and
Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas,
Texas, USA
- Human Informatics and Interaction
Research Institute, National Institute of Advanced Industrial Science and
Technology, Tsukuba, Ibaraki, Japan
- Department of Neurology, University
of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Marilyn Lu
- Department of Neurology, University
of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Ayaz M Khan
- Department of Diagnostic Imaging,
St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Jie Liu
- Department of Pharmacology,
Physiology and Neuroscience, Rutgers University, Newark, New Jersey, USA
| | - Evan P Pasha
- Institute for Exercise and
Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas,
Texas, USA
- Department of Neurology, University
of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Takashi Tarumi
- Institute for Exercise and
Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas,
Texas, USA
- Human Informatics and Interaction
Research Institute, National Institute of Advanced Industrial Science and
Technology, Tsukuba, Ibaraki, Japan
- Department of Neurology, University
of Texas Southwestern Medical Center, Dallas, Texas, USA
- Graduate School of Comprehensive
Human Sciences, University of Tsukuba, Tsukuba, Japan
| | - Rong Zhang
- Institute for Exercise and
Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas,
Texas, USA
- Department of Neurology, University
of Texas Southwestern Medical Center, Dallas, Texas, USA
- Department of Internal Medicine,
University of Texas Southwestern Medical Center, Dallas, Texas, USA
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2
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Xu K, Niu N, Li X, Chen Y, Wang D, Zhang J, Chen Y, Li H, Wei D, Chen K, Cui R, Zhang Z, Yao L. The characteristics of glucose metabolism and functional connectivity in posterior default network during nondemented aging: relationship with executive function performance. Cereb Cortex 2023; 33:2901-2911. [PMID: 35909217 PMCID: PMC10388385 DOI: 10.1093/cercor/bhac248] [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] [Received: 03/28/2022] [Revised: 05/20/2022] [Accepted: 05/21/2022] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Understanding the characteristics of intrinsic connectivity networks (ICNs) in terms of both glucose metabolism and functional connectivity (FC) is important for revealing cognitive aging and neurodegeneration, but the relationships between these two aspects during aging has not been well established in older adults. OBJECTIVE This study is to assess the relationship between age-related glucose metabolism and FC in key ICNs, and their direct or indirect effects on cognitive deficits in older adults. METHODS We estimated the individual-level standard uptake value ratio (SUVr) and FC of eleven ICNs in 59 cognitively unimpaired older adults, then analyzed the associations of SUVr and FC of each ICN and their relationships with cognitive performance. RESULTS The results showed both the SUVr and FC in the posterior default mode network (pDMN) had a significant decline with age, and the association between them was also significant. Moreover, both decline of metabolism and FC in the pDMN were significantly correlated with executive function decline. Finally, mediation analysis revealed the glucose metabolism mediated the FC decline with age and FC mediated the executive function deficits. CONCLUSIONS Our findings indicated that covariance between glucose metabolism and FC in the pDMN is one of the main routes that contributes to age-related executive function decline.
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Affiliation(s)
- Kai Xu
- School of Artificial Intelligence, Beijing Normal University, Beijing 100875, P.R. China
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing 100875, P.R. China
| | - Na Niu
- Department of Nuclear Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, No1 Shuaifuyuan,Wangfujing St., Dongcheng District, Beijing 100730, P.R. China
| | - Xin Li
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing 100875, P.R. China
- BABRI Centre, Beijing Normal University, Beijing 100875, P.R. China
| | - Yuan Chen
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing 100875, P.R. China
- BABRI Centre, Beijing Normal University, Beijing 100875, P.R. China
| | - Dandan Wang
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing 100875, P.R. China
- BABRI Centre, Beijing Normal University, Beijing 100875, P.R. China
| | - Junying Zhang
- BABRI Centre, Beijing Normal University, Beijing 100875, P.R. China
- Institute of Basic Research in Clinical Medicine, China Academy of Traditional Chinese Medicine, Beijing 10070, P.R. China
| | - Yaojing Chen
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing 100875, P.R. China
- BABRI Centre, Beijing Normal University, Beijing 100875, P.R. China
| | - He Li
- BABRI Centre, Beijing Normal University, Beijing 100875, P.R. China
- Institute of Basic Research in Clinical Medicine, China Academy of Traditional Chinese Medicine, Beijing 10070, P.R. China
| | - Dongfeng Wei
- BABRI Centre, Beijing Normal University, Beijing 100875, P.R. China
- Institute of Basic Research in Clinical Medicine, China Academy of Traditional Chinese Medicine, Beijing 10070, P.R. China
| | - Kewei Chen
- BABRI Centre, Beijing Normal University, Beijing 100875, P.R. China
- Department of Neurology, University of Arizona College of Medicine, Phoenix, AZ 85006, United States
| | - Ruixue Cui
- Department of Nuclear Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, No1 Shuaifuyuan,Wangfujing St., Dongcheng District, Beijing 100730, P.R. China
| | - Zhanjun Zhang
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing 100875, P.R. China
- BABRI Centre, Beijing Normal University, Beijing 100875, P.R. China
| | - Li Yao
- School of Artificial Intelligence, Beijing Normal University, Beijing 100875, P.R. China
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3
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Papp L, Rasul S, Spielvogel CP, Krajnc D, Poetsch N, Woehrer A, Patronas EM, Ecsedi B, Furtner J, Mitterhauser M, Rausch I, Widhalm G, Beyer T, Hacker M, Traub-Weidinger T. Sex-specific radiomic features of L-[S-methyl- 11C] methionine PET in patients with newly-diagnosed gliomas in relation to IDH1 predictability. Front Oncol 2023; 13:986788. [PMID: 36816966 PMCID: PMC9936222 DOI: 10.3389/fonc.2023.986788] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 01/23/2023] [Indexed: 02/05/2023] Open
Abstract
Introduction Amino-acid positron emission tomography (PET) is a validated metabolic imaging approach for the diagnostic work-up of gliomas. This study aimed to evaluate sex-specific radiomic characteristics of L-[S-methyl-11Cmethionine (MET)-PET images of glioma patients in consideration of the prognostically relevant biomarker isocitrate dehydrogenase (IDH) mutation status. Methods MET-PET of 35 astrocytic gliomas (13 females, mean age 41 ± 13 yrs. and 22 males, mean age 46 ± 17 yrs.) and known IDH mutation status were included. All patients underwent radiomic analysis following imaging biomarker standardization initiative (IBSI)-conform guidelines both from standardized uptake value (SUV) and tumor-to-background ratio (TBR) PET values. Aligned Monte Carlo (MC) 100-fold split was utilized for SUV and TBR dataset pairs for both sex and IDH-specific analysis. Borderline and outlier scores were calculated for both sex and IDH-specific MC folds. Feature ranking was performed by R-squared ranking and Mann-Whitney U-test together with Bonferroni correction. Correlation of SUV and TBR radiomics in relation to IDH mutational status in male and female patients were also investigated. Results There were no significant features in either SUV or TBR radiomics to distinguish female and male patients. In contrast, intensity histogram coefficient of variation (ih.cov) and intensity skewness (stat.skew) were identified as significant to predict IDH +/-. In addition, IDH+ females had significant ih.cov deviation (0.031) and mean stat.skew (-0.327) differences compared to IDH+ male patients (0.068 and -0.123, respectively) with two-times higher standard deviations of the normal brain background MET uptake as well. Discussion We demonstrated that female and male glioma patients have significantly different radiomic profiles in MET PET imaging data. Future IDH prediction models shall not be built on mixed female-male cohorts, but shall rely on sex-specific cohorts and radiomic imaging biomarkers.
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Affiliation(s)
- Laszlo Papp
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria
| | - Sazan Rasul
- Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria
| | - Clemens P. Spielvogel
- Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria,Christian Doppler Laboratory for Applied Metabolomics , Medical University of Vienna, Vienna, Austria
| | - Denis Krajnc
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria
| | - Nina Poetsch
- Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria
| | - Adelheid Woehrer
- Clinical Institute of Neurology, Medical University of Vienna, Vienna, Austria
| | - Eva-Maria Patronas
- Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria,Division of Pharmaceutical Technology and Biopharmaceutics, Department of Pharmaceutical Sciences, University of Vienna, Vienna, Austria
| | - Boglarka Ecsedi
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria
| | - Julia Furtner
- Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria
| | - Markus Mitterhauser
- Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria,Ludwig Boltzmann Institute Applied Diagnostics, Medical University of Vienna, Vienna, Austria
| | - Ivo Rausch
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria
| | - Georg Widhalm
- Clinical University of Neuro-Surgery, Medical University of Vienna, Vienna, Austria
| | - Thomas Beyer
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria
| | - Marcus Hacker
- Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria
| | - Tatjana Traub-Weidinger
- Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria,*Correspondence: Tatjana Traub-Weidinger,
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Keijzer K, Niezink AG, de Boer JW, van Doesum JA, Noordzij W, van Meerten T, van Dijk LV. Semi-automated 18F-FDG PET segmentation methods for tumor volume determination in Non-Hodgkin lymphoma patients: a literature review, implementation and multi-threshold evaluation. Comput Struct Biotechnol J 2023; 21:1102-1114. [PMID: 36789266 PMCID: PMC9900370 DOI: 10.1016/j.csbj.2023.01.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 01/18/2023] [Accepted: 01/18/2023] [Indexed: 01/21/2023] Open
Abstract
In the treatment of Non-Hodgkin lymphoma (NHL), multiple therapeutic options are available. Improving outcome predictions are essential to optimize treatment. The metabolic active tumor volume (MATV) has shown to be a prognostic factor in NHL. It is usually retrieved using semi-automated thresholding methods based on standardized uptake values (SUV), calculated from 18F-Fluorodeoxyglucose Positron Emission Tomography (18F-FDG PET) images. However, there is currently no consensus method for NHL. The aim of this study was to review literature on different segmentation methods used, and to evaluate selected methods by using an in house created software tool. A software tool, MUltiple SUV Threshold (MUST)-segmenter was developed where tumor locations are identified by placing seed-points on the PET images, followed by subsequent region growing. Based on a literature review, 9 SUV thresholding methods were selected and MATVs were extracted. The MUST-segmenter was utilized in a cohort of 68 patients with NHL. Differences in MATVs were assessed with paired t-tests, and correlations and distributions figures. High variability and significant differences between the MATVs based on different segmentation methods (p < 0.05) were observed in the NHL patients. Median MATVs ranged from 35 to 211 cc. No consensus for determining MATV is available based on the literature. Using the MUST-segmenter with 9 selected SUV thresholding methods, we demonstrated a large and significant variation in MATVs. Identifying the most optimal segmentation method for patients with NHL is essential to further improve predictions of toxicity, response, and treatment outcomes, which can be facilitated by the MUST-segmenter.
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Key Words
- 18F-FDG PET
- AT, adaptive thresholding methods
- CAR, chimeric antigen receptor
- CT, computed tomography
- DICOM, Digital Imaging and Communications in Medicine
- DLBCL, Diffuse large B-cell lymphoma
- EANM, European Association of Nuclear Medicine
- EARL, EANM Research Ltd.
- FDG, fluorodeoxyglucose
- HL, Hodgkin lymphoma
- IMG, robustness across image reconstruction methods
- IQR, interquartile range
- LBCL, Large B-cell lymphoma
- LDH, lactate dehydrogenase
- MAN, clinician based evaluation using manual segmentations
- MATV, Metabolic active tumor volume
- MIP, Maximum Intensity Projection
- MUST, Multiple SUV Thresholding
- Metabolic tumor volume
- NHL, Non-Hodgkin lymphoma
- Non-Hodgkin lymphoma
- OBS, robustness across observers
- OS, overall survival
- PD-L1, programmed cell death ligand-1
- PET segmentation
- PET, positron emission tomography
- PFS, progression free survival
- PROG, progression vs non-progression
- PTCL, Peripheral T-cell lymphoma
- PTLD, Post-transplant lymphoproliferative disorder
- QS, quality scores
- SOFT, robustness across software
- SUV thresholding
- SUV, standardized uptake value
- Segmentation software
- TCL, T-cell lymphoma
- UMCG, University Medical Center Groningen
- VOI, volume of interest
- cc, cubic centimeter
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Affiliation(s)
- Kylie Keijzer
- Department of Hematology, University Medical Center Groningen, Hanzeplein 1, 9713GZ Groningen, the Netherlands,Department of Radiation Oncology, University Medical Center Groningen, Hanzeplein 1, 9713GZ Groningen, the Netherlands
| | - Anne G.H. Niezink
- Department of Radiation Oncology, University Medical Center Groningen, Hanzeplein 1, 9713GZ Groningen, the Netherlands
| | - Janneke W. de Boer
- Department of Hematology, University Medical Center Groningen, Hanzeplein 1, 9713GZ Groningen, the Netherlands
| | - Jaap A. van Doesum
- Department of Hematology, University Medical Center Groningen, Hanzeplein 1, 9713GZ Groningen, the Netherlands
| | - Walter Noordzij
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, Hanzeplein 1, 9713GZ Groningen, the Netherlands
| | - Tom van Meerten
- Department of Hematology, University Medical Center Groningen, Hanzeplein 1, 9713GZ Groningen, the Netherlands
| | - Lisanne V. van Dijk
- Department of Radiation Oncology, University Medical Center Groningen, Hanzeplein 1, 9713GZ Groningen, the Netherlands,Corresponding author.
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5
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Deery HA, Di Paolo R, Moran C, Egan GF, Jamadar SD. Lower brain glucose metabolism in normal ageing is predominantly frontal and temporal: A systematic review and pooled effect size and activation likelihood estimates meta-analyses. Hum Brain Mapp 2022; 44:1251-1277. [PMID: 36269148 PMCID: PMC9875940 DOI: 10.1002/hbm.26119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/29/2022] [Accepted: 10/05/2022] [Indexed: 01/31/2023] Open
Abstract
This review provides a qualitative and quantitative analysis of cerebral glucose metabolism in ageing. We undertook a systematic literature review followed by pooled effect size and activation likelihood estimates (ALE) meta-analyses. Studies were retrieved from PubMed following the PRISMA guidelines. After reviewing 635 records, 21 studies with 22 independent samples (n = 911 participants) were included in the pooled effect size analyses. Eight studies with eleven separate samples (n = 713 participants) were included in the ALE analyses. Pooled effect sizes showed significantly lower cerebral metabolic rates of glucose for older versus younger adults for the whole brain, as well as for the frontal, temporal, parietal, and occipital lobes. Among the sub-cortical structures, the caudate showed a lower metabolic rate among older adults. In sub-group analyses controlling for changes in brain volume or partial volume effects, the lower glucose metabolism among older adults in the frontal lobe remained significant, whereas confidence intervals crossed zero for the other lobes and structures. The ALE identified nine clusters of lower glucose metabolism among older adults, ranging from 200 to 2640 mm3 . The two largest clusters were in the left and right inferior frontal and superior temporal gyri and the insula. Clusters were also found in the inferior temporal junction, the anterior cingulate and caudate. Taken together, the results are consistent with research showing less efficient glucose metabolism in the ageing brain. The findings are discussed in the context of theories of cognitive ageing and are compared to those found in neurodegenerative disease.
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Affiliation(s)
- Hamish A. Deery
- Turner Institute for Brain and Mental HealthMonash UniversityMelbourneAustralia,Monash Biomedical ImagingMonash UniversityMelbourneAustralia
| | - Robert Di Paolo
- Turner Institute for Brain and Mental HealthMonash UniversityMelbourneAustralia,Monash Biomedical ImagingMonash UniversityMelbourneAustralia
| | - Chris Moran
- Peninsula Clinical School, Central Clinical SchoolMonash UniversityFrankstonVictoriaAustralia,Department of Geriatric MedicinePeninsula HealthFrankstonVictoriaAustralia
| | - Gary F. Egan
- Turner Institute for Brain and Mental HealthMonash UniversityMelbourneAustralia,Monash Biomedical ImagingMonash UniversityMelbourneAustralia,Australian Research Council Centre of Excellence for Integrative Brain FunctionMelbourneAustralia
| | - Sharna D. Jamadar
- Turner Institute for Brain and Mental HealthMonash UniversityMelbourneAustralia,Monash Biomedical ImagingMonash UniversityMelbourneAustralia,Australian Research Council Centre of Excellence for Integrative Brain FunctionMelbourneAustralia
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Keeratitanont K, Theerakulpisut D, Auvichayapat N, Suphakunpinyo C, Patjanasoontorn N, Tiamkao S, Tepmongkol S, Khiewvan B, Raruenrom Y, Srisuruk P, Paholpak S, Auvichayapat P. Brain laterality evaluated by F-18 fluorodeoxyglucose positron emission computed tomography in autism spectrum disorders. Front Mol Neurosci 2022; 15:901016. [PMID: 36034502 PMCID: PMC9399910 DOI: 10.3389/fnmol.2022.901016] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 07/13/2022] [Indexed: 12/04/2022] Open
Abstract
Background and rationale Autism spectrum disorder (ASD) is a neuropsychiatric disorder that has no curative treatment. Little is known about the brain laterality in patients with ASD. F-18 fluorodeoxyglucose positron emission computed tomography (F-18 FDG PET/CT) is a neuroimaging technique that is suitable for ASD owing to its ability to detect whole brain functional abnormalities in a short time and is feasible in ASD patients. The purpose of this study was to evaluate brain laterality using F-18 FDG PET/CT in patients with high-functioning ASD. Materials and methods This case-control study recruited eight ASD patients who met the DSM-5 criteria, the recorded data of eight controls matched for age, sex, and handedness were also enrolled. The resting state of brain glucose metabolism in the regions of interest (ROIs) was analyzed using the Q.Brain software. Brain glucose metabolism and laterality index in each ROI of ASD patients were compared with those of the controls. The pattern of brain metabolism was analyzed using visual analysis and is reported in the data description. Results The ASD group’s overall brain glucose metabolism was lower than that of the control group in both the left and right hemispheres, with mean differences of 1.54 and 1.21, respectively. We found statistically lower mean glucose metabolism for ASD patients than controls in the left prefrontal lateral (Z = 1.96, p = 0.049). The left laterality index was found in nine ROIs for ASD and 11 ROIs for the control. The left laterality index in the ASD group was significantly lower than that in the control group in the prefrontal lateral (Z = 2.52, p = 0.012), precuneus (Z = 2.10, p = 0.036), and parietal inferior (Z = 1.96, p = 0.049) regions. Conclusion Individuals with ASD have lower brain glucose metabolism than control. In addition, the number of ROIs for left laterality index in the ASD group was lower than control. Left laterality defects may be one of the causes of ASD. This knowledge can be useful in the treatment of ASD by increasing the left-brain metabolism. This trial was registered in the Thai Clinical Trials Registry (TCTR20210705005).
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Affiliation(s)
- Keattichai Keeratitanont
- Division of Nuclear Medicine, Department of Radiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Noninvasive Brain Stimulation Research Group of Thailand, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Daris Theerakulpisut
- Division of Nuclear Medicine, Department of Radiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Narong Auvichayapat
- Noninvasive Brain Stimulation Research Group of Thailand, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Department of Pediatrics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Chanyut Suphakunpinyo
- Noninvasive Brain Stimulation Research Group of Thailand, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Department of Pediatrics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Niramol Patjanasoontorn
- Noninvasive Brain Stimulation Research Group of Thailand, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Department of Psychiatry, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Somsak Tiamkao
- Noninvasive Brain Stimulation Research Group of Thailand, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Department of Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Supatporn Tepmongkol
- Division of Nuclear Medicine, Department of Radiology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
- Chulalongkorn University Biomedical Imaging Group (CUBIG), Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Benjapa Khiewvan
- Division of Nuclear Medicine, Department of Radiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Yutapong Raruenrom
- Division of Nuclear Medicine, Department of Radiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Piyawan Srisuruk
- Department of Educational Psychology and Counseling, Faculty of Education, Khon Kaen University, Khon Kaen, Thailand
- Research and Service Institute for Autism, Khon Kaen University, Khon Kaen, Thailand
| | - Suchat Paholpak
- Department of Psychiatry, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Research and Service Institute for Autism, Khon Kaen University, Khon Kaen, Thailand
| | - Paradee Auvichayapat
- Noninvasive Brain Stimulation Research Group of Thailand, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Research and Service Institute for Autism, Khon Kaen University, Khon Kaen, Thailand
- *Correspondence: Paradee Auvichayapat,
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7
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Reduced white matter microstructural integrity in prediabetes and diabetes: A population-based study. EBioMedicine 2022; 82:104144. [PMID: 35810560 PMCID: PMC9278067 DOI: 10.1016/j.ebiom.2022.104144] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 06/06/2022] [Accepted: 06/22/2022] [Indexed: 11/27/2022] Open
Abstract
Background White matter (WM) microstructural abnormalities have been observed in diabetes. However, evidence of prediabetes is currently lacking. This study aims to investigate the WM integrity in prediabetes and diabetes. We also assess the association of WM abnormalities with glucose metabolism status and continuous glucose measures. Methods The WM integrity was analyzed using cross-sectional baseline data from a population-based PolyvasculaR Evaluation for Cognitive Impairment and vaScular Events (PRECISE) study. The cohort, including a total of 2218 cases with the mean age of 61.3 ± 6.6 years and 54.1% female, consisted of 1205 prediabetes which are categorized into two subgroups (a group of 254 prediabetes with combined impaired fasting glucose (IFG) and impaired glucose tolerance (IGT) and the other group of 951 prediabetes without combined IFG/IGT), 504 diabetes, and 509 normal control subjects. Alterations of WM integrity were determined by diffusion tensor imaging along with tract-based spatial statistics analysis to compare diffusion metrics on WM skeletons between groups. The mixed-effects multivariate linear regression models were used to assess the association between WM microstructural alterations and glucose status. Findings Microstructural abnormalities distributed in local WM tracts in prediabetes with combined IFG/IGT and spread widely in diabetes. These WM abnormalities are associated with higher glucose measures. Interpretation Our findings suggest that WM microstructural abnormalities are already present at the prediabetes with combined IFG/IGT stage. Preventative strategies should begin early to maintain normal glucose metabolism and avert further destruction of WM integrity. Funding Partially supported by National Key R&D Program of China (2016YFC0901002).
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8
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Yun M, Nie B, Wen W, Zhu Z, Liu H, Nie S, Lanzenberger R, Wei Y, Hacker M, Shan B, Schelbert HR, Li X, Zhang X. Assessment of cerebral glucose metabolism in patients with heart failure by 18F-FDG PET/CT imaging. J Nucl Cardiol 2022; 29:476-488. [PMID: 32691347 DOI: 10.1007/s12350-020-02258-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 06/10/2020] [Indexed: 12/23/2022]
Abstract
BACKGROUND To evaluate the cerebral metabolism in patients with heart failure (HF). METHODS One hundred and two HF patients were prospectively enrolled, who underwent gated 99mTc-sestamibi single photon emission computed tomography (SPECT)/CT, cardiac and cerebral 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET)/CT. Fifteen healthy volunteers served as controls. Patients were stratified by extent of hibernating myocardium (HM) and left ventricular ejection fraction (LVEF) into 4 groups where Group1: HM < 10% (n = 33); Group2: HM ≥ 10%, LVEF < 25% (n = 34); Group3: HM ≥ 10%, 25% ≤ LVEF ≤ 40% (n = 16) and Group 4: LVEF > 40% (n = 19). The standardized uptake value (SUV) in the whole brain (SUVwhole-brain) and the SUV ratios (SUVR) in 24 cognition-related brain regions were determined. SUVwhole-brain and SUVRs were compared between the 4 patient groups and the healthy controls. RESULTS SUVwhole-brain (r = 0.245, P = 0.013) and SUVRs in frontal areas, hippocampus, and para-hippocampus (r: 0.213 to 0.308, all P < 0.05) were correlated with HM. SUVwhole-brain differed between four patient groups and the healthy volunteers (P = 0.016) and SUVwhole-brain in Group 1 was lower than that in healthy volunteers (P < 0.05). SUVRs of Group 3 in frontal areas were the highest among four patient subgroups (P < 0.05). CONCLUSIONS Cerebral metabolism in the whole brain was reduced but maintained in cognition-related frontal areas in HF patients with HM and moderately impaired global left ventricular function.
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Affiliation(s)
- Mingkai Yun
- Department of Nuclear Medicine, Laboratory for Molecular Imaging, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Upper Airway Dysfunction and Related Cardiovascular Diseases, Beijing, China
| | - Binbin Nie
- Division of Nuclear Technology and Applications, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China
| | - Wanwan Wen
- Department of Nuclear Medicine, Laboratory for Molecular Imaging, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Upper Airway Dysfunction and Related Cardiovascular Diseases, Beijing, China
| | - Ziwei Zhu
- Department of Nuclear Medicine, Laboratory for Molecular Imaging, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Upper Airway Dysfunction and Related Cardiovascular Diseases, Beijing, China
| | - Hua Liu
- Division of Nuclear Technology and Applications, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China
| | - Shaoping Nie
- Beijing Key Laboratory of Upper Airway Dysfunction and Related Cardiovascular Diseases, Beijing, China
- Division of Emergency & Critical Care Centre, Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Rupert Lanzenberger
- Neuroimaging Labs (NIL), Department of Psychiatry and Psychotherapy, Medical University of Vienna, Vienna, Austria
| | - Yongxiang Wei
- Department of Nuclear Medicine, Laboratory for Molecular Imaging, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Upper Airway Dysfunction and Related Cardiovascular Diseases, Beijing, China
| | - Marcus Hacker
- Division of Nuclear Medicine, Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria
| | - Baoci Shan
- Division of Nuclear Technology and Applications, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China
| | - Heinrich R Schelbert
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Xiang Li
- Department of Nuclear Medicine, Laboratory for Molecular Imaging, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- Division of Nuclear Medicine, Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria
| | - Xiaoli Zhang
- Department of Nuclear Medicine, Laboratory for Molecular Imaging, Beijing Anzhen Hospital, Capital Medical University, Beijing, China.
- Beijing Key Laboratory of Upper Airway Dysfunction and Related Cardiovascular Diseases, Beijing, China.
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9
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Cerebral Arterial Asymmetries in the Neonate: Insight into the Pathogenesis of Stroke. Symmetry (Basel) 2022. [DOI: 10.3390/sym14030456] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Neonatal and adult strokes are more common in the left than in the right cerebral hemisphere in the middle cerebral arterial territory, and adult extracranial and intracranial vessels are systematically left-dominant. The aim of the research reported here was to determine whether the asymmetric vascular ground plan found in adults was present in healthy term neonates (n = 97). A new transcranial Doppler ultrasonography dual-view scanning protocol, with concurrent B-flow and pulsed wave imaging, acquired multivariate data on the neonatal middle cerebral arterial structure and function. This study documents for the first-time systematic asymmetries in the middle cerebral artery origin and distal trunk of healthy term neonates and identifies commensurately asymmetric hemodynamic vulnerabilities. A systematic leftward arterial dominance was found in the arterial caliber and cortically directed blood flow. The endothelial wall shear stress was also asymmetric across the midline and varied according to vessels’ geometry. We conclude that the arterial structure and blood supply in the brain are laterally asymmetric in newborns. Unfavorable shearing forces, which are a by-product of the arterial asymmetries described here, might contribute to a greater risk of cerebrovascular pathology in the left hemisphere.
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10
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Trigo D, Avelar C, Fernandes M, Sá J, da Cruz E Silva O. Mitochondria, energy, and metabolism in neuronal health and disease. FEBS Lett 2022; 596:1095-1110. [PMID: 35088449 DOI: 10.1002/1873-3468.14298] [Citation(s) in RCA: 55] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 01/10/2022] [Accepted: 01/17/2022] [Indexed: 11/09/2022]
Abstract
Mitochondria are associated with various cellular activities critical to homeostasis, particularly in the nervous system. The plastic architecture of the mitochondrial network and its dynamic structure play crucial roles in ensuring that varying energetic demands are rapidly met to maintain neuronal and axonal energy homeostasis. Recent evidence associates ageing and neurodegeneration with anomalous neuronal metabolism, as age-dependent alterations of neuronal metabolism are now believed to occur prior to neurodegeneration. The brain has a high energy demand, which makes it particularly sensitive to mitochondrial dysfunction. Distinct cellular events causing oxidative stress or disruption of metabolism and mitochondrial homeostasis can trigger a neuropathology. This review explores the bioenergetic hypothesis for the neurodegenerative pathomechanisms, discussing factors leading to age-related brain hypometabolism and its contribution to cognitive decline. Recent research on the mitochondrial network in healthy nervous system cells, its response to stress and how it is affected by pathology, as well as current contributions to novel therapeutic approaches will be highlighted.
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Affiliation(s)
- Diogo Trigo
- Neuroscience and Signalling Laboratory, Institute of Biomedicine (iBiMED), Department of Medical Sciences, University of Aveiro, 3810-193, Aveiro, Portugal.,Medical Sciences Department, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Catarina Avelar
- Medical Sciences Department, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Miguel Fernandes
- Medical Sciences Department, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Juliana Sá
- Medical Sciences Department, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Odete da Cruz E Silva
- Neuroscience and Signalling Laboratory, Institute of Biomedicine (iBiMED), Department of Medical Sciences, University of Aveiro, 3810-193, Aveiro, Portugal.,Medical Sciences Department, University of Aveiro, 3810-193, Aveiro, Portugal
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11
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Germán F, Andres D, Leandro U, Nicolás N, Graciela L, Yanina B, Patricio C, Adriana Q, Cecilia B, Ismael C, Ismael C, de León MP, Valeria C, Feuerstein V, Sergio D, Ricardo A, Henry E, Silvia V. Connectivity and Patterns of Regional Cerebral Blood Flow, Cerebral Glucose Uptake, and Aβ-Amyloid Deposition in Alzheimer's Disease (Early and Late-Onset) Compared to Normal Ageing. Curr Alzheimer Res 2021; 18:646-655. [PMID: 34784866 DOI: 10.2174/1567205018666211116095035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 08/11/2021] [Accepted: 09/09/2021] [Indexed: 11/22/2022]
Abstract
PURPOSE The aim of this study was to investigate the differences in early (EOAD) and late (LOAD) onset of Alzheimer´s disease, as well as glucose uptake, regional cerebral blood flow (R1), amyloid depositions, and functional brain connectivity between normal young (YC) and Old Controls (OC). METHODOLOGY The study included 22 YC (37 ± 5 y), 22 OC (73 ± 5.9 y), 18 patients with EOAD (63 ± 9.5 y), and 18 with LOAD (70.6 ± 7.1 y). Patients underwent FDG and PIB PET/CT. R1 images were obtained from the compartmental analysis of the dynamic PIB acquisitions. Images were analyzed by a voxel-wise and a VOI-based approach. Functional connectivity was studied from the R1 and glucose uptake images. RESULTS OC had a significant reduction of R1 and glucose uptake compared to YC, predominantly at the dorsolateral and mesial frontal cortex. EOAD and LOAD vs. OC showed a decreased R1 and glucose uptake at the posterior parietal cortex, precuneus, and posterior cingulum. EOAD vs. LOAD showed a reduction in glucose uptake and R1 at the occipital and parietal cortex and an increased at the mesial frontal and temporal cortex. There was a mild increase in an amyloid deposition at the frontal cortex in LOAD vs. EOAD. YC presented higher connectivity than OC in R1 but lower connectivity considering glucose uptake. Moreover, EOAD and LOAD showed a decreased connectivity compared to controls that were more pronounced in glucose uptake than R1. CONCLUSION Our results demonstrated differences in amyloid deposition and functional imaging between groups and a differential pattern of functional connectivity in R1 and glucose uptake in each clinical condition. These findings provide new insights into the pathophysiological processes of AD and may have an impact on patient diagnostic evaluation.
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Affiliation(s)
- Falasco Germán
- Centro de Imagenes Moleculares, Fleni. Ruta 9, km 52.5, B1625XAF Escobar, Buenos Aires, Argentina
| | - Damian Andres
- Centro Uruguayo de Imagenologia Molecular, CUDIM. Av. Ricaldoni 2010, Montevideo, Uruguay
| | - Urrutia Leandro
- Centro de Imagenes Moleculares, Fleni. Ruta 9, km 52.5, B1625XAF Escobar, Buenos Aires, Argentina
| | - Niell Nicolás
- Centro Uruguayo de Imagenologia Molecular, CUDIM. Av. Ricaldoni 2010, Montevideo, Uruguay
| | - Lago Graciela
- Centro Uruguayo de Imagenologia Molecular, CUDIM. Av. Ricaldoni 2010, Montevideo, Uruguay
| | - Bérgamo Yanina
- Departamento de Neurología Cognitiva, Neuropsiquiatria y Neuropsicología, Fleni. Montaneses 2325, C1428AQK, Ciudad de Buenos Aires, Argentina
| | - Chrem Patricio
- Departamento de Neurología Cognitiva, Neuropsiquiatría y Neuropsicología, Fleni. Montañeses 2325, C1428AQK, Ciudad de Buenos Aires, Argentina
| | - Quagliata Adriana
- Centro Uruguayo de Imagenologia Molecular, CUDIM. Av. Ricaldoni 2010, Montevideo, Uruguay
| | - Bentancourt Cecilia
- Centro Uruguayo de Imagenologia Molecular, CUDIM. Av. Ricaldoni 2010, Montevideo, Uruguay
| | - Calandri Ismael
- Departamento de Neurología Cognitiva, Neuropsiquiatria y Neuropsicología, Fleni. Montaneses 2325, C1428AQK, Ciudad de Buenos Aires, Argentina
| | - Cordero Ismael
- Centro Uruguayo de Imagenologia Molecular, CUDIM. Av. Ricaldoni 2010, Montevideo, Uruguay
| | - Magdalena Ponce de León
- Centro de Imagenes Moleculares, Fleni. Ruta 9, km 52.5, B1625XAF Escobar, Buenos Aires, Argentina
| | - Contreras Valeria
- Departamento de Neuropsicología, Instituto de Neurologia, Hospital de Clinicas, Montevideo, Uruguay
| | - Viviana Feuerstein
- Departamento de Neuropsicología, Instituto de Neurologia, Hospital de Clinicas, Montevideo, Uruguay
| | - Dansilio Sergio
- Departamento de Neuropsicología, Instituto de Neurologia, Hospital de Clinicas, Montevideo, Uruguay
| | - Allegri Ricardo
- Departamento de Neurología Cognitiva, Neuropsiquiatria y Neuropsicología, Fleni. Montaneses 2325, C1428AQK, Ciudad de Buenos Aires, Argentina
| | - Engler Henry
- Facultad de Medicina, Universidad de la Republica, Montevideo, Uruguay
| | - Vazquez Silvia
- Centro de Imagenes Moleculares, Fleni. Ruta 9, km 52.5, B1625XAF Escobar, Buenos Aires, Argentina
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12
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Evaluation of Age and Sex-Related Metabolic Changes in Healthy Subjects: An Italian Brain 18F-FDG PET Study. J Clin Med 2021; 10:jcm10214932. [PMID: 34768454 PMCID: PMC8584846 DOI: 10.3390/jcm10214932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/19/2021] [Accepted: 10/21/2021] [Indexed: 11/26/2022] Open
Abstract
Background: 18F-fluorodeoxyglucose (18F-FDG) positron-emission-tomography (PET) allows detection of cerebral metabolic alterations in neurological diseases vs. normal aging. We assess age- and sex-related brain metabolic changes in healthy subjects, exploring impact of activity normalization methods. Methods: brain scans of Italian Association of Nuclear Medicine normative database (151 subjects, 67 Males, 84 Females, aged 20–84) were selected. Global mean, white matter, and pons activity were explored as normalization reference. We performed voxel-based and ROI analyses using SPM12 and IBM-SPSS software. Results: SPM proved a negative correlation between age and brain glucose metabolism involving frontal lobes, anterior-cingulate and insular cortices bilaterally. Narrower clusters were detected in lateral parietal lobes, precuneus, temporal pole and medial areas bilaterally. Normalizing on pons activity, we found a more significant negative correlation and no positive one. ROIs analysis confirmed SPM results. Moreover, a significant age × sex interaction effect was revealed, with worse metabolic reduction in posterior-cingulate cortices in females than males, especially in post-menopausal age. Conclusions: this study demonstrated an age-related metabolic reduction in frontal lobes and in some parieto-temporal areas more evident in females. Results suggested pons as the most appropriate normalization reference. Knowledge of age- and sex-related cerebral metabolic changes is critical to correctly interpreting brain 18F-FDG PET imaging.
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13
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Dong QY, Li TR, Jiang XY, Wang XN, Han Y, Jiang JH. Glucose metabolism in the right middle temporal gyrus could be a potential biomarker for subjective cognitive decline: a study of a Han population. ALZHEIMERS RESEARCH & THERAPY 2021; 13:74. [PMID: 33827675 PMCID: PMC8028241 DOI: 10.1186/s13195-021-00811-w] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 03/22/2021] [Indexed: 12/16/2022]
Abstract
Introduction Subjective cognitive decline (SCD) represents a cognitively normal state but at an increased risk for developing Alzheimer’s disease (AD). Recognizing the glucose metabolic biomarkers of SCD could facilitate the location of areas with metabolic changes at an ultra-early stage. The objective of this study was to explore glucose metabolic biomarkers of SCD at the region of interest (ROI) level. Methods This study was based on cohorts from two tertiary medical centers, and it was part of the SILCODE project (NCT03370744). Twenty-six normal control (NC) cases and 32 SCD cases were in cohort 1; 36 NCs, 23 cases of SCD, 32 cases of amnestic mild cognitive impairment (aMCIs), 32 cases of AD dementia (ADDs), and 22 cases of dementia with Lewy bodies (DLBs) were in cohort 2. Each subject underwent [18F]fluoro-2-deoxyglucose positron emission tomography (PET) imaging and magnetic resonance imaging (MRI), and subjects from cohort 1 additionally underwent amyloid-PET scanning. The ROI analysis was based on the Anatomical Automatic Labeling (AAL) template; multiple permutation tests and repeated cross-validations were conducted to determine the metabolic differences between NC and SCD cases. In addition, receiver operating characteristic curves were used to evaluate the capabilities of potential glucose metabolic biomarkers in distinguishing different groups. Pearson correlation analysis was also performed to explore the correlation between glucose metabolic biomarkers and neuropsychological scales or amyloid deposition. Results Only the right middle temporal gyrus (RMTG) passed the methodological verification, and its metabolic levels were correlated with the degrees of complaints (R = − 0.239, p = 0.009), depression (R = − 0.200, p = 0.030), and abilities of delayed memory (R = 0.207, p = 0.025), and were weakly correlated with cortical amyloid deposition (R = − 0.246, p = 0.066). Furthermore, RMTG metabolism gradually decreased across the cognitive continuum, and its diagnostic efficiency was comparable (NC vs. ADD, aMCI, or DLB) or even superior (NC vs. SCD) to that of the metabolism of the posterior cingulate cortex or precuneus. Conclusions These findings suggest that the hypometabolism of RMTG could be a typical feature of SCD, and the large-scale hypometabolism in patients with symptomatic stages of AD may start from the RMTG, which gradually progresses starting in the preclinical stage. The specificity of identifying SCD from the perspective of self-perceived symptoms is likely to be increased by the detection of RMTG metabolism. Supplementary Information The online version contains supplementary material available at 10.1186/s13195-021-00811-w.
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Affiliation(s)
- Qiu-Yue Dong
- Key laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, School of Information and Communication Engineering, Shanghai University, Shanghai, China
| | - Tao-Ran Li
- Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China
| | - Xue-Yan Jiang
- Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China.,German Center for Neurodegenerative Diseases, Clinical Research group, Venusberg Campus 1, Building 99, Bonn, Germany
| | - Xiao-Ni Wang
- Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China
| | - Ying Han
- Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China. .,School of Biomedical Engineering, Hainan University, Haikou, China. .,Center of Alzheimer's Disease, Beijing Institute for Brain Disorders, Beijing, China. .,National Clinical Research Center for Geriatric Disorders, Beijing, China.
| | - Jie-Hui Jiang
- Key laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, School of Information and Communication Engineering, Shanghai University, Shanghai, China.
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14
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Zhang Q, Miao Q, Yang Y, Lu J, Zhang H, Feng Y, Wu W, Zhu X, Xiang B, Sun Q, Guan Y, Li Y, Zuo C, Ye H. Neuropeptide Y Plays an Important Role in the Relationship Between Brain Glucose Metabolism and Brown Adipose Tissue Activity in Healthy Adults: A PET/CT Study. Front Endocrinol (Lausanne) 2021; 12:694162. [PMID: 34305816 PMCID: PMC8299202 DOI: 10.3389/fendo.2021.694162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 06/11/2021] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION Brown adipose tissue (BAT) becomes the favorite target for preventing and treating metabolic diseases because the activated BAT can produce heat and consume energy. The brain, especially the hypothalamus, which secretes Neuropeptide Y (NPY), is speculated to regulate BAT activity. However, whether NPY is involved in BAT activity's central regulation in humans remains unclear. Thus, it's essential to explore the relationship between brain glucose metabolism and human BAT activity. METHODS A controlled study with a large sample of healthy adults used Positron emission tomography/computed tomography (PET/CT) to noninvasively investigate BAT's activity and brain glucose metabolism in vivo. Eighty healthy adults with activated BAT according to the PET/CT scan volunteered to be the BAT positive group, while 80 healthy adults without activated BAT but with the same gender, similar age, and BMI, scanning on the same day, were recruited as the control (BAT negative). We use Statistical parametric mapping (SPM) to analyze the brain image data, Picture Archiving & Communication System (PACS), and PET/CT Viewer software to calculate the semi-quantitative values of brain glucose metabolism and BAT activity. ELISA tested the levels of fasting plasma NPY. The multiple linear regression models were used to analyze the correlation between brain glucose metabolism, the level of NPY, and the BAT activity in the BAT positive group. RESULTS (1) Compared with controls, BAT positive group showed significant metabolic decreases mainly in the right Insula (BA13a, BA13b) and the right claustrum (uncorrected P <0.01, adjusted BMI). (2) The three brain regions' semi-quantitative values in the BAT positive group were significantly lower than the negative group (all P values < 0.05). (3) After adjusting for age, gender, BMI, and outside temperature, there was a negative correlation between brain metabolic values and BAT activity (all P values < 0.05). However, after further adjusting for NPY level, there were no significant differences between the BA13b metabolic values and BAT activity (P>0.05), while the correlation between the BA13a metabolic values and BAT activity still was significant (P< 0.05). CONCLUSIONS Regional brain glucose metabolism is closely related to healthy adults' BAT activity, which may be mediated by NPY.
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Affiliation(s)
- Qiongyue Zhang
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Metabolic Remodeling and Health, Institute of Metabolism & Integrative Biology, Fudan University, Shanghai, China
- *Correspondence: Hongying Ye, ; Chuantao Zuo, ; Yiming Li, ; Qiongyue Zhang,
| | - Qing Miao
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yehong Yang
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Jiaying Lu
- Positron Emission Tomography (PET) Center, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Huiwei Zhang
- Positron Emission Tomography (PET) Center, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yonghao Feng
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Wei Wu
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Xiaoming Zhu
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Boni Xiang
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Quanya Sun
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yihui Guan
- Positron Emission Tomography (PET) Center, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yiming Li
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
- *Correspondence: Hongying Ye, ; Chuantao Zuo, ; Yiming Li, ; Qiongyue Zhang,
| | - Chuantao Zuo
- Positron Emission Tomography (PET) Center, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
- *Correspondence: Hongying Ye, ; Chuantao Zuo, ; Yiming Li, ; Qiongyue Zhang,
| | - Hongying Ye
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
- *Correspondence: Hongying Ye, ; Chuantao Zuo, ; Yiming Li, ; Qiongyue Zhang,
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15
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Kanemoto H, Kazui H, Adachi H, Yoshiyama K, Wada T, Nomura KT, Shimosegawa E, Ikeda M. Thalamic pulvinar metabolism, sleep disturbances, and hallucinations in dementia with Lewy bodies: Positron emission tomography and actigraphy study. Int J Geriatr Psychiatry 2020; 35:934-943. [PMID: 32346907 DOI: 10.1002/gps.5315] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 04/04/2020] [Accepted: 04/24/2020] [Indexed: 11/08/2022]
Abstract
OBJECTIVES Although sleep disturbances are prevalent among patients with dementia with Lewy bodies (DLB), their neural substrates remain unclear. We aimed to clarify the neural substrates of sleep disturbances in patients with DLB. METHODS We evaluated sleep disturbances, neuropsychiatric symptoms, and brain glucose metabolism in 22 patients with probable DLB using actigraphy, the Neuropsychiatric Inventory (NPI), and 18 F-fluorodeoxyglucose (FDG) positron emission tomography, respectively. Total sleep time (TST) and average activity count per minute (AAC) during sleep were calculated for seven consecutive days via actigraphy. We investigated associations between FDG uptake and the actigraphy parameters using Statistical Parametric Mapping version 12b. Spearman's rank correlation coefficients were used to investigate associations among TST, AAC, and clinical symptoms. The level of statistical significance was set at P < .05. P values were adjusted using the Benjamini-Hochberg method for multiple comparisons. This study was registered with ClinicalTrials.gov (NCT00776347). RESULTS TST exhibited a significant positive association with FDG uptake in the bilateral orbitofrontal cortex and left thalamus, while AAC exhibited a significant negative association with FDG uptake in the left thalamus and the left parieto-occipital region. FDG uptake in the left pulvinar was associated with both TST and AAC. In addition, TST exhibited a significant negative association with the NPI hallucinations score (r = -0.66, P = .001), while AAC exhibited significant positive associations with the NPI delusions (r = 0.70, P < .001) and hallucinations (r = 0.63, P = .002) scores. CONCLUSIONS TST and bodily activity during sleep are associated with dysfunction of the left pulvinar and the severity of hallucinations in patients with DLB.
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Affiliation(s)
- Hideki Kanemoto
- Department of Psychiatry, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hiroaki Kazui
- Department of Psychiatry, Osaka University Graduate School of Medicine, Osaka, Japan.,Department of Neuropsychiatry, Kochi Medical School, Kochi University, Kochi, Japan
| | - Hiroyoshi Adachi
- Department of Psychiatry, Osaka University Graduate School of Medicine, Osaka, Japan.,Department of Psychiatry, Osaka University Health and Counseling Center, Osaka, Japan
| | - Kenji Yoshiyama
- Department of Psychiatry, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Tamiki Wada
- Department of Psychiatry, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Keiko T Nomura
- Department of Psychiatry, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Eku Shimosegawa
- Department of Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Manabu Ikeda
- Department of Psychiatry, Osaka University Graduate School of Medicine, Osaka, Japan
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16
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Pardo JV, Nyabwari SM, Lee JT. Aging-Related Hypometabolism in the Anterior Cingulate Cortex of Cognitively Intact, Amyloid-Negative Seniors at Rest Mediates the Relationship between Age and Executive Function but Not Memory. Cereb Cortex Commun 2020; 1:tgaa020. [PMID: 34296097 PMCID: PMC8152906 DOI: 10.1093/texcom/tgaa020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 04/27/2020] [Accepted: 05/05/2020] [Indexed: 11/14/2022] Open
Abstract
The anterior cingulate cortex (ACC) shows the most aging-related brain metabolic dysfunction that correlates with decreasing executive processing in otherwise healthy, cognitively intact volunteers. Here, data from ADNI are used to elucidate potential pathophysiological mechanisms involved in cognitive aging, that is, age-related decline in cognitive performance in the absence of known neurodegenerative disease. Amyloid-negative volunteers showed statistically significant mediation of ACC metabolism in the relationship between age and verbal fluency. A nonlinguistic task of executive function, Trails B, showed also negative correlation between performance and age, albeit weaker, but was not significant in the mediation analysis. Recall of story items, minimizing attentional demands compared with learning of word lists, did not correlate with age. ADNI subjects selected for low vascular risks also showed correlation between age and declining ACC metabolism. In the whole-brain amyloid-negative subset, ACC amyloid was not correlated with age. As expected, the metabolism in an arbitrary region such as motor cortex that was not expected to decline with cognitive aging showed no correlation with age or ACC metabolism suggesting regional specificity. These findings motivate the search for the pathophysiology of aging-related ACC dysfunction to prevent, diagnose, and treat the decline in executive function associated with cognitive aging.
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Affiliation(s)
- José V Pardo
- Cognitive Neuroimaging Unit, Mental Health Patient Service Line, Minneapolis Veterans Health Care System, Minneapolis, MN 55417, USA
- Department of Psychiatry, University of Minnesota, Minneapolis, MN 55454, USA
| | - Shantal M Nyabwari
- Cognitive Neuroimaging Unit, Mental Health Patient Service Line, Minneapolis Veterans Health Care System, Minneapolis, MN 55417, USA
- Department of Psychiatry, University of Minnesota, Minneapolis, MN 55454, USA
| | - Joel T Lee
- Cognitive Neuroimaging Unit, Mental Health Patient Service Line, Minneapolis Veterans Health Care System, Minneapolis, MN 55417, USA
- Department of Psychiatry, University of Minnesota, Minneapolis, MN 55454, USA
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17
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Beheshti M, Manafi-Farid R, Rezaee A, Langsteger W. PET/CT and PET/MRI, Normal Variations, and Artifacts. Clin Nucl Med 2020. [DOI: 10.1007/978-3-030-39457-8_17] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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18
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Perez Ortiz JM, Swerdlow RH. Mitochondrial dysfunction in Alzheimer's disease: Role in pathogenesis and novel therapeutic opportunities. Br J Pharmacol 2019; 176:3489-3507. [PMID: 30675901 PMCID: PMC6715612 DOI: 10.1111/bph.14585] [Citation(s) in RCA: 255] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 12/07/2018] [Indexed: 12/13/2022] Open
Abstract
Dysfunction of cell bioenergetics is a common feature of neurodegenerative diseases, the most common of which is Alzheimer's disease (AD). Disrupted energy utilization implicates mitochondria at its nexus. This review summarizes some of the evidence that points to faulty mitochondrial function in AD and highlights past and current therapeutic development efforts. Classical neuropathological hallmarks of disease (β-amyloid and τ) and sporadic AD risk genes (APOE) may trigger mitochondrial disturbance, yet mitochondrial dysfunction may incite pathology. Preclinical and clinical efforts have overwhelmingly centred on the amyloid pathway, but clinical trials have yet to reveal clear-cut benefits. AD therapies aimed at mitochondrial dysfunction are few and concentrate on reversing oxidative stress and cell death pathways. Novel research efforts aimed at boosting mitochondrial and bioenergetic function offer an alternative treatment strategy. Enhancing cell bioenergetics in preclinical models may yield widespread favourable effects that could benefit persons with AD. LINKED ARTICLES: This article is part of a themed section on Therapeutics for Dementia and Alzheimer's Disease: New Directions for Precision Medicine. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v176.18/issuetoc.
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Affiliation(s)
- Judit M. Perez Ortiz
- University of Kansas Alzheimer's Disease CenterFairwayKSUSA
- Department of NeurologyUniversity of Kansas Medical CenterKansas CityKSUSA
| | - Russell H. Swerdlow
- University of Kansas Alzheimer's Disease CenterFairwayKSUSA
- Department of NeurologyUniversity of Kansas Medical CenterKansas CityKSUSA
- Department of Molecular and Integrative PhysiologyUniversity of Kansas Medical CenterKansas CityKSUSA
- Department of Biochemistry and Molecular BiologyUniversity of Kansas Medical CenterKansas CityKSUSA
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19
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Finnsson J, Lubberink M, Savitcheva I, Fällmar D, Melberg A, Kumlien E, Raininko R. Glucose metabolism in the brain in LMNB1-related autosomal dominant leukodystrophy. Acta Neurol Scand 2019; 139:135-142. [PMID: 30192380 PMCID: PMC6585974 DOI: 10.1111/ane.13024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 09/02/2018] [Indexed: 12/26/2022]
Abstract
OBJECTIVE LMNB1-related autosomal dominant leukodystrophy is caused by an overexpression of the protein lamin B1, usually due to a duplication of the LMNB1 gene. Symptoms start in 5th to 6th decade. This slowly progressive disease terminates with death. We studied brain glucose metabolism in this disease using 18 F-fluorodeoxyglucose positron emission tomography (PET). METHODS We examined 8 patients, aged 48-64 years, in varying stages of clinical symptomatology. Two patients were investigated with quantitative PET on clinical indications after which six more patients were recruited. Absolute glucose metabolism was analyzed with the PVElab software in 6 patients and 18 healthy controls. A semiquantitative analysis using the CortexID software was performed in seven investigations, relating local metabolism levels to global glucose metabolism. RESULTS The clinical quantitative PET revealed low global glucose metabolism, with the most marked reduction in the cerebellum. In the PVElab analysis, patients presented low mean glucose metabolism in the cerebellum, brainstem and global grey matter. In the semiquantitative analysis, 2 patients showed a decreased metabolism in the cerebellum and 4 patients a relatively higher metabolism in parts of the temporal lobes. Since none of the patients showed an increased metabolism in the quantitative analysis, we interpret these increases as "pseudo-increases" related to a globally reduced metabolism. CONCLUSIONS Global reduction of grey matter glucose metabolism in this white matter disease most likely depends on a combination of cortical afferent dysfunction and, in later stages, neuronal loss. The lowest metabolism in the cerebellum is consistent with histopathological findings and prominent cerebellar symptoms.
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Affiliation(s)
| | | | - Irina Savitcheva
- Nuclear Medicine and PETUppsala UniversityUppsalaSweden
- Clinical Science, Intervention and Technology (CLINTEC)Karolinska InstitutetStockholmSweden
| | | | - Atle Melberg
- Neuroscience, NeurologyUppsala UniversityUppsalaSweden
| | - Eva Kumlien
- Neuroscience, NeurologyUppsala UniversityUppsalaSweden
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20
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Physiological Whole-Brain Distribution of [18F]FDOPA Uptake Index in Relation to Age and Gender: Results from a Voxel-Based Semi-quantitative Analysis. Mol Imaging Biol 2018; 21:549-557. [PMID: 30073569 DOI: 10.1007/s11307-018-1256-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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21
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Decrease in glucose transporter 1 levels and translocation of glucose transporter 3 in the dentate gyrus of C57BL/6 mice and gerbils with aging. Lab Anim Res 2018; 34:58-64. [PMID: 29937912 PMCID: PMC6010402 DOI: 10.5625/lar.2018.34.2.58] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 05/04/2018] [Accepted: 05/04/2018] [Indexed: 11/21/2022] Open
Abstract
In the present study, we compared the cell-specific expression and changes protein levels in the glucose transporters (GLUTs) 1 and 3, the major GLUTs in the mouse and gerbil brains using immunohistochemistry and Western blot analysis. In both mouse and gerbils, GLUT1 immunoreactivity was mainly found in the blood vessels in the dentate gyrus, while GLUT3 immunoreactivity was detected in the subgranular zone and the molecular layer of the dentate gyrus. GLUT1-immunoreactivity in blood vessels and GLUT1 protein levels were significantly decreased with age in the mice and gerbils, respectively. In addition, few GLUT3-immunoreactive cells were found in the subgranular zone in aged mice and gerbils, but GLUT3-immunoreactivity was abundantly found in the polymorphic layer of dentate gyrus in mice and gerbils with a dot-like pattern. Based on the double immunofluorescence study, GLUT3-immunoreactive structures in gerbils were localized in the glial fibrillary acidic protein-immunoreactive astrocytes in the dentate gyrus. Western blot analysis showed that GLUT3 expression in the hippocampal homogenates was slightly, although not significantly, decreased with age in mice and gerbils, respectively. These results indicate that the reduction in GLUT1 in the blood vessels of dentate gyrus and GLUT3 in the subgranular zone of dentate gyrus may be associated with the decrease in uptake of glucose into brain and neuroblasts in the dentate gyrus. In addition, the expression of GLUT3 in the astrocytes in polymorphic layer of dentate gyrus may be associated with metabolic changes in glucose in aged hippocampus.
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22
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Tarumi T, Zhang R. Cerebral blood flow in normal aging adults: cardiovascular determinants, clinical implications, and aerobic fitness. J Neurochem 2018; 144:595-608. [PMID: 28986925 PMCID: PMC5874160 DOI: 10.1111/jnc.14234] [Citation(s) in RCA: 137] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 09/05/2017] [Accepted: 10/02/2017] [Indexed: 12/13/2022]
Abstract
Senescence is a leading cause of mortality, disability, and non-communicable chronic diseases in older adults. Mounting evidence indicates that the presence of cardiovascular disease and risk factors elevates the incidence of both vascular cognitive impairment and Alzheimer's disease (AD). Age-related declines in cardiovascular function may impair cerebral blood flow (CBF) regulation, leading to the disruption of neuronal micro-environmental homeostasis. The brain is the most metabolically active organ with limited intracellular energy storage and critically depends on CBF to sustain neuronal metabolism. In patients with AD, cerebral hypoperfusion, increased CBF pulsatility, and impaired blood pressure control during orthostatic stress have been reported, indicating exaggerated, age-related decline in both cerebro- and cardiovascular function. Currently, AD lacks effective treatments; therefore, the development of preventive strategy is urgently needed. Regular aerobic exercise improves cardiovascular function, which in turn may lead to a better CBF regulation, thus reducing the dementia risk. In this review, we discuss the effects of aging on cardiovascular regulation of CBF and provide new insights into the vascular mechanisms of cognitive impairment and potential effects of aerobic exercise training on CBF regulation. This article is part of the Special Issue "Vascular Dementia".
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Affiliation(s)
- Takashi Tarumi
- Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas (8200 Walnut Hill Ln, Dallas, TX, USA 75231)
- Department of Neurology and Neurotherapeutics, University of Texas Southwestern Medical Center (5323 Harry Hines Blvd, TX, USA 75390)
| | - Rong Zhang
- Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas (8200 Walnut Hill Ln, Dallas, TX, USA 75231)
- Department of Neurology and Neurotherapeutics, University of Texas Southwestern Medical Center (5323 Harry Hines Blvd, TX, USA 75390)
- Department of Internal Medicine, University of Texas Southwestern Medical Center (5323 Harry Hines Blvd, TX, USA 75390)
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23
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Evaluation of factors influencing 18F-FET uptake in the brain. NEUROIMAGE-CLINICAL 2017; 17:491-497. [PMID: 29159062 PMCID: PMC5684535 DOI: 10.1016/j.nicl.2017.11.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 10/24/2017] [Accepted: 11/07/2017] [Indexed: 01/20/2023]
Abstract
PET using the amino-acid O-(2-18F-fluoroethyl)-l-tyrosine (18F-FET) is gaining increasing interest for brain tumour management. Semi-quantitative analysis of tracer uptake in brain tumours is based on the standardized uptake value (SUV) and the tumour-to-brain ratio (TBR). The aim of this study was to explore physiological factors that might influence the relationship of SUV of 18F-FET uptake in various brain areas, and thus affect quantification of 18F-FET uptake in brain tumours. Negative 18F-FET PET scans of 107 subjects, showing an inconspicuous brain distribution of 18F-FET, were evaluated retrospectively. Whole-brain quantitative analysis with Statistical Parametric Mapping (SPM) using parametric SUV PET images, and volumes of interest (VOIs) analysis with fronto-parietal, temporal, occipital, and cerebellar SUV background areas were performed to study the effect of age, gender, height, weight, injected activity, body mass index (BMI), and body surface area (BSA). After multivariate analysis, female gender and high BMI were found to be two independent factors associated with increased SUV of 18F-FET uptake in the brain. In women, SUVmean of 18F-FET uptake in the brain was 23% higher than in men (p < 0.01). SUVmean of 18F-FET uptake in the brain was positively correlated with BMI (r = 0.29; p < 0.01). The influence of these factors on SUV of 18F-FET was similar in all brain areas. In conclusion, SUV of 18F-FET in the normal brain is influenced by gender and weakly by BMI, but changes are similar in all brain areas. SUVmean of 18F-FET in the normal brain is influenced by gender. SUVmean of 18F-FET in the normal brain is weekly influenced by BMI. The influence of these factors on SUV of 18F-FET is similar in all brain areas.
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24
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Solingapuram Sai KK, Donald Gage H, Almaguel F, Neth B, Hughes TM, Tremblay S, Castellano CA, Cunnane SC, Jorgensen MJ, Craft S, Mintz A. Automated synthesis of 1-[ 11C]acetoacetate on a TRASIS AIO module. Appl Radiat Isot 2017; 129:57-61. [PMID: 28806598 DOI: 10.1016/j.apradiso.2017.07.066] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Revised: 05/24/2017] [Accepted: 07/31/2017] [Indexed: 12/26/2022]
Abstract
We automated radiochemical synthesis of 1-[11C]acetoacetate in a commercially available radiochemistry module, TRASIS AllInOne by [11C]carboxylation of the corresponding enolate anion generated in situ from isopropenylacetate and MeLi, and purified by ion-exchange column resins.1-[11C]acetoacetate was synthesized with high radiochemical purity (95%) and specific activity (~ 66.6GBq/µmol, n = 30) with 35% radiochemical yield, decay corrected to end of synthesis. The total synthesis required ~ 16min. PET imaging studies were conducted with 1-[11C]acetoacetate in vervet monkeys to validate the radiochemical synthesis. Tissue uptake distribution was similar to that reported in humans.
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Affiliation(s)
| | - H Donald Gage
- Department of Radiology, Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Frankis Almaguel
- Department of Radiology, Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Bryan Neth
- Department of Internal Medicine, Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Timothy M Hughes
- Department of Internal Medicine, Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Sebastien Tremblay
- Research Center on Aging, Sherbrooke Molecular Imaging Center, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | | | - Stephen C Cunnane
- Research Center on Aging, Sherbrooke Molecular Imaging Center, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Matthew J Jorgensen
- Department of Pathology-Comparative Medicine, Wake Forest School of Medicine, USA
| | - Suzanne Craft
- Department of Internal Medicine, Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Akiva Mintz
- Department of Radiology, Wake Forest School of Medicine, Winston Salem, NC, USA
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25
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Malpetti M, Ballarini T, Presotto L, Garibotto V, Tettamanti M, Perani D. Gender differences in healthy aging and Alzheimer's Dementia: A 18 F-FDG-PET study of brain and cognitive reserve. Hum Brain Mapp 2017; 38:4212-4227. [PMID: 28561534 DOI: 10.1002/hbm.23659] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 04/21/2017] [Accepted: 05/12/2017] [Indexed: 12/30/2022] Open
Abstract
Cognitive reserve (CR) and brain reserve (BR) are protective factors against age-associated cognitive decline and neurodegenerative disorders. Very limited evidence exists about gender effects on brain aging and on the effect of CR on brain modulation in healthy aging and Alzheimer's Dementia (AD). We investigated gender differences in brain metabolic activity and resting-state network connectivity, as measured by 18 F-FDG-PET, in healthy aging and AD, also considering the effects of education and occupation. The clinical and imaging data were retrieved from large datasets of healthy elderly subjects (HE) (225) and AD patients (282). In HE, males showed more extended age-related reduction of brain metabolism than females in frontal medial cortex. We also found differences in brain modulation as metabolic increases induced by education and occupation, namely in posterior associative cortices in HE males and in the anterior limbic-affective and executive networks in HE females. In AD patients, the correlations between education and occupation levels and brain hypometabolism showed gender differences, namely a posterior temporo-parietal association in males and a frontal and limbic association in females, indicating the involvement of different networks. Finally, the metabolic connectivity in both HE and AD aligned with these results, suggesting greater efficiency in the posterior default mode network for males, and in the anterior frontal executive network for females. The basis of these brain gender differences in both aging and AD, obtained exploring cerebral metabolism, metabolic connectivity and the effects of education and occupation, is likely at the intersection between biological and sociodemographic factors. Hum Brain Mapp 38:4212-4227, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Maura Malpetti
- Department of Psychology, Università Vita-Salute San Raffaele, Milan, Italy.,Division of Neuroscience, San Raffaele Scientific Institute, Milan, Italy
| | - Tommaso Ballarini
- Division of Neuroscience, San Raffaele Scientific Institute, Milan, Italy
| | - Luca Presotto
- Division of Neuroscience, San Raffaele Scientific Institute, Milan, Italy.,Nuclear Medicine Unit, San Raffaele Hospital, Milan, Italy
| | - Valentina Garibotto
- Division of Nuclear Medicine and Molecular Imaging, Geneva University Hospital, Geneva, Switzerland
| | - Marco Tettamanti
- Division of Neuroscience, San Raffaele Scientific Institute, Milan, Italy
| | - Daniela Perani
- Department of Psychology, Università Vita-Salute San Raffaele, Milan, Italy.,Division of Neuroscience, San Raffaele Scientific Institute, Milan, Italy.,Nuclear Medicine Unit, San Raffaele Hospital, Milan, Italy
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26
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Healthy brain ageing assessed with 18F-FDG PET and age-dependent recovery factors after partial volume effect correction. Eur J Nucl Med Mol Imaging 2016; 44:838-849. [PMID: 27878594 DOI: 10.1007/s00259-016-3569-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 11/03/2016] [Indexed: 12/26/2022]
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27
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Zhang H, Wu P, Ziegler SI, Guan Y, Wang Y, Ge J, Schwaiger M, Huang SC, Zuo C, Förster S, Shi K. Data-driven identification of intensity normalization region based on longitudinal coherency of 18F-FDG metabolism in the healthy brain. Neuroimage 2016; 146:589-599. [PMID: 27693611 DOI: 10.1016/j.neuroimage.2016.09.031] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 09/06/2016] [Accepted: 09/13/2016] [Indexed: 10/20/2022] Open
Abstract
OBJECTIVES In brain 18F-FDG PET data intensity normalization is usually applied to control for unwanted factors confounding brain metabolism. However, it can be difficult to determine a proper intensity normalization region as a reference for the identification of abnormal metabolism in diseased brains. In neurodegenerative disorders, differentiating disease-related changes in brain metabolism from age-associated natural changes remains challenging. This study proposes a new data-driven method to identify proper intensity normalization regions in order to improve separation of age-associated natural changes from disease related changes in brain metabolism. METHODS 127 female and 128 male healthy subjects (age: 20 to 79) with brain18F-FDG PET/CT in the course of a whole body cancer screening were included. Brain PET images were processed using SPM8 and were parcellated into 116 anatomical regions according to the AAL template. It is assumed that normal brain 18F-FDG metabolism has longitudinal coherency and this coherency leads to better model fitting. The coefficient of determination R2 was proposed as the coherence coefficient, and the total coherence coefficient (overall fitting quality) was employed as an index to assess proper intensity normalization strategies on single subjects and age-cohort averaged data. Age-associated longitudinal changes of normal subjects were derived using the identified intensity normalization method correspondingly. In addition, 15 subjects with clinically diagnosed Parkinson's disease were assessed to evaluate the clinical potential of the proposed new method. RESULTS Intensity normalizations by paracentral lobule and cerebellar tonsil, both regions derived from the new data-driven coherency method, showed significantly better coherence coefficients than other intensity normalization regions, and especially better than the most widely used global mean normalization. Intensity normalization by paracentral lobule was the most consistent method within both analysis strategies (subject-based and age-cohort averaging). In addition, the proposed new intensity normalization method using the paracentral lobule generates significantly higher differentiation from the age-associated changes than other intensity normalization methods. CONCLUSION Proper intensity normalization can enhance the longitudinal coherency of normal brain glucose metabolism. The paracentral lobule followed by the cerebellar tonsil are shown to be the two most stable intensity normalization regions concerning age-dependent brain metabolism. This may provide the potential to better differentiate disease-related changes from age-related changes in brain metabolism, which is of relevance in the diagnosis of neurodegenerative disorders.
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Affiliation(s)
- Huiwei Zhang
- PET Center, Huashan Hospital, Fudan University, Shanghai, China
| | - Ping Wu
- PET Center, Huashan Hospital, Fudan University, Shanghai, China
| | - Sibylle I Ziegler
- Dept. Nuclear Medicine, Technische Universität München, Munich, Germany
| | - Yihui Guan
- PET Center, Huashan Hospital, Fudan University, Shanghai, China
| | - Yuetao Wang
- Department Nuclear Medicine, The Third Affiliated Hospital of Soochow University, Soochow, China
| | - Jingjie Ge
- PET Center, Huashan Hospital, Fudan University, Shanghai, China
| | - Markus Schwaiger
- Dept. Nuclear Medicine, Technische Universität München, Munich, Germany
| | - Sung-Cheng Huang
- Department Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California, Los Angeles, USA
| | - Chuantao Zuo
- PET Center, Huashan Hospital, Fudan University, Shanghai, China.
| | - Stefan Förster
- Dept. Nuclear Medicine, Technische Universität München, Munich, Germany; TUM Neuroimaging Center (TUM-NIC), Technische Universität München, Munich, Germany
| | - Kuangyu Shi
- Dept. Nuclear Medicine, Technische Universität München, Munich, Germany
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28
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Jansen van Vuuren A, Saling MM, Ameen O, Naidoo N, Solms M. Hand preference is selectively related to common and internal carotid arterial asymmetry. Laterality 2016; 22:377-398. [PMID: 27380444 DOI: 10.1080/1357650x.2016.1205596] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
This study documents relationships between handedness and carotid arterial asymmetries. The article is divided into two sections, considering first geometric (n = 195) and then haemodynamic (n = 228) asymmetries. In the geometric study, diameters, lengths, and angles of the common carotid arteries in left and right-handed participants were measured using computed tomography angiography scans. Resistance to blood flow was calculated according to Poiseuille's formula. In the haemodynamic study, peak systolic and end-diastolic velocity, vessel diameter, and volume flow rate of the common, internal, and external carotid arteries were measured in left and right-handed participants, using Doppler ultrasonography. The findings reveal for the first time that the extracranial arteries supplying the cerebral hemispheres are asymmetrical in a direction that increases blood flow to the hemisphere dominant for handedness. Significant handedness interactions were identified in arterial length, diameter, resistance to blood flow, velocity and flow volume rate (p < .001). Arterial resistance and volume flow rates significantly predicted hand preference and proficiency. Our findings reveal a vascular correlate of handedness, but causality cannot be determined from this study alone. These asymmetries appear to be independent of aortic arch anomalies, suggesting a top-down, possibly demand-driven, pattern of development.
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Affiliation(s)
| | - Michael M Saling
- b Melbourne School of Psychological Sciences, University of Melbourne , Parkville , VIC , Australia.,c Florey Institute of Neurosciences and Mental Health , Melbourne , Australia
| | - Ozyar Ameen
- a Department of Psychology , University of Cape Town , Rondebosch , South Africa
| | - Nadraj Naidoo
- a Department of Psychology , University of Cape Town , Rondebosch , South Africa
| | - Mark Solms
- a Department of Psychology , University of Cape Town , Rondebosch , South Africa
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29
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Trotta N, Archambaud F, Goldman S, Baete K, Van Laere K, Wens V, Van Bogaert P, Chiron C, De Tiège X. Functional integration changes in regional brain glucose metabolism from childhood to adulthood. Hum Brain Mapp 2016; 37:3017-30. [PMID: 27133021 DOI: 10.1002/hbm.23223] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 03/31/2016] [Accepted: 04/10/2016] [Indexed: 02/03/2023] Open
Abstract
The aim of this study was to investigate the age-related changes in resting-state neurometabolic connectivity from childhood to adulthood (6-50 years old). Fifty-four healthy adult subjects and twenty-three pseudo-healthy children underwent [(18) F]-fluorodeoxyglucose positron emission tomography at rest. Using statistical parametric mapping (SPM8), age and age squared were first used as covariate of interest to identify linear and non-linear age effects on the regional distribution of glucose metabolism throughout the brain. Then, by selecting voxels of interest (VOI) within the regions showing significant age-related metabolic changes, a psychophysiological interaction (PPI) analysis was used to search for age-induced changes in the contribution of VOIs to the metabolic activity in other brain areas. Significant linear or non-linear age-related changes in regional glucose metabolism were found in prefrontal cortices (DMPFC/ACC), cerebellar lobules, and thalamo-hippocampal areas bilaterally. Decreases were found in the contribution of thalamic, hippocampal, and cerebellar regions to DMPFC/ACC metabolic activity as well as in the contribution of hippocampi to preSMA and right IFG metabolic activities. Increases were found in the contribution of the right hippocampus to insular cortex and of the cerebellar lobule IX to superior parietal cortex metabolic activities. This study evidences significant linear or non-linear age-related changes in regional glucose metabolism of mesial prefrontal, thalamic, mesiotemporal, and cerebellar areas, associated with significant modifications in neurometabolic connectivity involving fronto-thalamic, fronto-hippocampal, and fronto-cerebellar networks. These changes in functional brain integration likely represent a metabolic correlate of age-dependent effects on sensory, motor, and high-level cognitive functional networks. Hum Brain Mapp 37:3017-3030, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Nicola Trotta
- Laboratoire de Cartographie fonctionnelle du Cerveau (LCFC) - ULB Neuroscience Institute (UNI), Université libre de Bruxelles (ULB), Brussels, Belgium.,Department of Nuclear Medicine, Hôpital Erasme, Université libre de Bruxelles (ULB), Brussels, Belgium
| | | | - Serge Goldman
- Laboratoire de Cartographie fonctionnelle du Cerveau (LCFC) - ULB Neuroscience Institute (UNI), Université libre de Bruxelles (ULB), Brussels, Belgium.,Department of Nuclear Medicine, Hôpital Erasme, Université libre de Bruxelles (ULB), Brussels, Belgium
| | - Kristof Baete
- Department of Nuclear Medicine, UZ Leuven, Leuven, Belgium
| | - Koen Van Laere
- Department of Nuclear Medicine, UZ Leuven, Leuven, Belgium
| | - Vincent Wens
- Laboratoire de Cartographie fonctionnelle du Cerveau (LCFC) - ULB Neuroscience Institute (UNI), Université libre de Bruxelles (ULB), Brussels, Belgium
| | - Patrick Van Bogaert
- Laboratoire de Cartographie fonctionnelle du Cerveau (LCFC) - ULB Neuroscience Institute (UNI), Université libre de Bruxelles (ULB), Brussels, Belgium
| | | | - Xavier De Tiège
- Laboratoire de Cartographie fonctionnelle du Cerveau (LCFC) - ULB Neuroscience Institute (UNI), Université libre de Bruxelles (ULB), Brussels, Belgium
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30
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FDG-PET Contributions to the Pathophysiology of Memory Impairment. Neuropsychol Rev 2015; 25:326-55. [PMID: 26319237 DOI: 10.1007/s11065-015-9297-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 08/04/2015] [Indexed: 10/23/2022]
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31
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Li CT, Bai YM, Hsieh JC, Lee HC, Yang BH, Chen MH, Lin WC, Tsai CF, Tu PC, Wang SJ, Su TP. Peripheral and central glucose utilizations modulated by mitochondrial DNA 10398A in bipolar disorder. Psychoneuroendocrinology 2015; 55:72-80. [PMID: 25727318 DOI: 10.1016/j.psyneuen.2015.02.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Revised: 01/17/2015] [Accepted: 02/04/2015] [Indexed: 12/22/2022]
Abstract
Bipolar disorder (BD) is highly heritable and associated with dysregulation of brain glucose utilizations (GU). The mitochondrial DNA (mtDNA) 10398A polymorphism, as a reported BD risk factor, leads to deficient glycolytic energy production by affecting mitochondrial matrix pH and intracellular calcium levels. However, whether mtDNA-10398A has functional effects on the brain and how our body responds remain elusive. We compared peripheral and central glucose-utilizing patterns between mtDNA A10398G polymorphisms in BD and their unaffected siblings (BDsib). Since siblings carry identical mtDNA, we hypothesized that certain characteristics co-segregate in BD families. We recruited twenty-seven pairs of non-diabetic BD patients and their BDsib and 30 well-matched healthy control subjects (HC). The following were investigated: mtDNA, fasting plasma glucose/insulin, cognitive functions including Montreal Cognitive Assessment (MoCA), and brain GU at rest. Insulin resistance was rechecked in sixty-one subjects (19-BD, 18-BDsibib, and 24-HC) six months later. We found that BD-pairs (BD+BDsib) carried more mtDNA-10398A and had higher fasting glucose, even after controlling for many covariates. BD-pairs had abnormally lower dorso-prefrontal-GU and higher cerebellar-GU, but only BD demonstrated lower medio-prefrontal-GU and MoCA. Subjects carrying mtDNA-10398A had significantly lower prefrontal-GU (FWE-corrected p<0.05). An abnormal inverse pattern of insulin-GU and insulin-MoCA correlation was found in BD-pairs. The insulin-MoCA correlation was particularly prominent in those carrying mtDNA-10398A. mtDNA-10398A predicted insulin resistance 6 months later. In conclusion, mtDNA-10398A was associated with impaired prefrontal-GU. An up-regulation of glucose utilizations was found in BD-pairs, probably compensating for mtDNA-10398A-related energy loss.
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Affiliation(s)
- Cheng-Ta Li
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan; Division of Psychiatry, Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Ya-Mei Bai
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan; Division of Psychiatry, Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Jen-Chuen Hsieh
- Integrated Brain Research Unit, Division of Clinical Research, Department of Medical Research, Taipei Veterans General Hospital, Taiwan; Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan
| | - Hsin-Chen Lee
- Department and Institute of Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Bang-Hung Yang
- Department of Nuclear Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Mu-Hong Chen
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan; Division of Psychiatry, Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Wei-Chen Lin
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan; Division of Psychiatry, Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Chia-Fen Tsai
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan; Division of Psychiatry, Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Pei-Chi Tu
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan; Division of Psychiatry, Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Shyh-Jen Wang
- Department of Nuclear Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Tung-Ping Su
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan; Division of Psychiatry, Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan; Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan.
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Brain: normal variations and benign findings in fluorodeoxyglucose-PET/computed tomography imaging. PET Clin 2015; 9:129-40. [PMID: 24772054 DOI: 10.1016/j.cpet.2013.10.006] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Brain 18F-fluorodeoxyglucose (18F-FDG) PET allows the in vivo study of cerebral glucose metabolism, reflecting neuronal and synaptic activity. 18F-FDG-PET has been extensively used to detect metabolic alterations in several neurologic diseases compared with normal aging. However, healthy subjects have variants of 18F-FDG distribution, especially as associated with aging. This article focuses on 18F-FDG-PET findings in so-called normal brain aging, and in particular on metabolic differences occurring with aging and as a function of people’s gender. The effect of different substances, medications, and therapy procedures are discussed, as well as common artifacts.
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Swerdlow RH. Bioenergetic medicine. Br J Pharmacol 2014; 171:1854-69. [PMID: 24004341 DOI: 10.1111/bph.12394] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2013] [Revised: 08/17/2013] [Accepted: 08/22/2013] [Indexed: 12/12/2022] Open
Abstract
Here we discuss a specific therapeutic strategy we call 'bioenergetic medicine'. Bioenergetic medicine refers to the manipulation of bioenergetic fluxes to positively affect health. Bioenergetic medicine approaches rely heavily on the law of mass action, and impact systems that monitor and respond to the manipulated flux. Since classically defined energy metabolism pathways intersect and intertwine, targeting one flux also tends to change other fluxes, which complicates treatment design. Such indirect effects, fortunately, are to some extent predictable, and from a therapeutic perspective may also be desirable. Bioenergetic medicine-based interventions already exist for some diseases, and because bioenergetic medicine interventions are presently feasible, new approaches to treat certain conditions, including some neurodegenerative conditions and cancers, are beginning to transition from the laboratory to the clinic.
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Affiliation(s)
- Russell H Swerdlow
- Departments of Neurology, Molecular and Integrative Physiology, Biochemistry and Molecular Biology, University of Kansas School of Medicine, Kansas City, KS, USA; Alzheimer's Disease Center, University of Kansas Medical Center, Fairway, KS, USA
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Benson BE, Willis MW, Ketter TA, Speer A, Kimbrell TA, Herscovitch P, George MS, Post RM. Differential abnormalities of functional connectivity of the amygdala and hippocampus in unipolar and bipolar affective disorders. J Affect Disord 2014; 168:243-53. [PMID: 25069080 PMCID: PMC5109926 DOI: 10.1016/j.jad.2014.05.045] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2011] [Revised: 09/27/2013] [Accepted: 05/23/2014] [Indexed: 10/25/2022]
Abstract
OBJECTIVE The amygdala and hippocampus - two structures intimately associated with mood and cognition - have been reported to exhibit altered neural activity or volume in affective disorders. We hypothesized the amygdala and hippocampus would show altered and differential patterns of connectivity in patients with bipolar (BPs) and unipolar (UPs) disorder compared to healthy volunteers. METHOD Thirty BPs, 34 UPs, and 66 healthy volunteers were imaged using F-18-fluorodeoxyglucose and positron emission tomography while performing an auditory continuous performance task (CPT). Normalized mean activity of the amygdala and hippocampus was correlated with the rest of the brain. RESULTS In BPs, the amygdalae displayed exaggerated positive metabolic correlations with prefrontal and ventral striatal areas, while the hippocampus showed a paucity of normal inter-relations compared to controls. In contrast, in UPs the amygdala was significantly negatively correlated with prefrontal and anterior cingulate cortex, while the hippocampus was significantly more positively correlated to these same prefrontal areas. CONCLUSIONS During a simple cognitive task, the functional connectivity of the amygdala and hippocampus, regions usually associated with emotion and memory regulation, was substantially different in affective illness compared to healthy controls whether or not there were baseline abnormalities in these areas. These striking differences in functional connectivity of amygdala and hippocampus should be further explored in ill and well states and using more specific emotion and cognitive evocative tasks.
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Affiliation(s)
- Brenda E. Benson
- National Institute of Mental Health, NIH, Bethesda, MD, United States, Correspondence to: National Institute of Mental Health, National Institutes of Health, Department of Health and Human Services, Bldg 10 Rm B1D43D, 10 Center Drive, Bethesda, MD 20892-1028, United States. Tel.: +1 301 496 6825; fax: +1 301 480 4684. (B.E. Benson)
| | | | - Terence A. Ketter
- Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, United States
| | - Andrew Speer
- National Institute of Mental Health, NIH, Bethesda, MD, United States
| | - Tim A. Kimbrell
- Veterans Affairs Medical Center, Little Rock, AR, United States
| | - Peter Herscovitch
- Positron Emission Tomography Department, NIH, Bethesda, MD, United States
| | - Mark S. George
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC, United States
| | - Robert M. Post
- Biological Psychiatry Branch, NIMH, NIH, Bethesda, MD, United States, Bipolar Collaborative Network, Bethesda, MD, United States
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Swerdlow RH, Burns JM, Khan SM. The Alzheimer's disease mitochondrial cascade hypothesis: progress and perspectives. BIOCHIMICA ET BIOPHYSICA ACTA 2014; 1842:1219-31. [PMID: 24071439 PMCID: PMC3962811 DOI: 10.1016/j.bbadis.2013.09.010] [Citation(s) in RCA: 503] [Impact Index Per Article: 50.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 09/14/2013] [Accepted: 09/16/2013] [Indexed: 01/01/2023]
Abstract
Ten years ago we first proposed the Alzheimer's disease (AD) mitochondrial cascade hypothesis. This hypothesis maintains that gene inheritance defines an individual's baseline mitochondrial function; inherited and environmental factors determine rates at which mitochondrial function changes over time; and baseline mitochondrial function and mitochondrial change rates influence AD chronology. Our hypothesis unequivocally states in sporadic, late-onset AD, mitochondrial function affects amyloid precursor protein (APP) expression, APP processing, or beta amyloid (Aβ) accumulation and argues if an amyloid cascade truly exists, mitochondrial function triggers it. We now review the state of the mitochondrial cascade hypothesis, and discuss it in the context of recent AD biomarker studies, diagnostic criteria, and clinical trials. Our hypothesis predicts that biomarker changes reflect brain aging, new AD definitions clinically stage brain aging, and removing brain Aβ at any point will marginally impact cognitive trajectories. Our hypothesis, therefore, offers unique perspective into what sporadic, late-onset AD is and how to best treat it.
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Affiliation(s)
- Russell H Swerdlow
- Departments of Neurology and Molecular and Integrative Physiology, and the University of Kansas Alzheimer's Disease Center, University of Kansas School of Medicine, Kansas City, KS, USA; Department of Biochemistry and Molecular Biology, University of Kansas School of Medicine, Kansas City, KS, USA.
| | - Jeffrey M Burns
- Departments of Neurology and Molecular and Integrative Physiology, and the University of Kansas Alzheimer's Disease Center, University of Kansas School of Medicine, Kansas City, KS, USA
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Nugent S, Tremblay S, Chen KW, Ayutyanont N, Roontiva A, Castellano CA, Fortier M, Roy M, Courchesne-Loyer A, Bocti C, Lepage M, Turcotte E, Fulop T, Reiman EM, Cunnane SC. Brain glucose and acetoacetate metabolism: a comparison of young and older adults. Neurobiol Aging 2014; 35:1386-95. [DOI: 10.1016/j.neurobiolaging.2013.11.027] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Revised: 11/18/2013] [Accepted: 11/24/2013] [Indexed: 12/22/2022]
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Yoshizawa H, Gazes Y, Stern Y, Miyata Y, Uchiyama S. Characterizing the normative profile of 18F-FDG PET brain imaging: sex difference, aging effect, and cognitive reserve. Psychiatry Res 2014; 221:78-85. [PMID: 24262800 DOI: 10.1016/j.pscychresns.2013.10.009] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Revised: 07/14/2013] [Accepted: 10/25/2013] [Indexed: 10/26/2022]
Abstract
The aim of this study was to investigate findings of positron emission tomography with 18F-fluorodeoxyglucose (18F-FDG PET) in normal subjects to clarify the effects of sex differences, aging, and cognitive reserve on cerebral glucose metabolism. Participants comprised 123 normal adults who underwent 18F-FDG PET and a neuropsychological battery. We used statistical parametric mapping (SPM8) to investigate sex differences, and aging effects. The effects of cognitive reserve on 18F-FDG uptake were investigated using years of education as a proxy. Finally, we studied the effect of cognitive reserve on the recruitment of glucose metabolism in a memory task by dichotomizing the data according to educational level. Our results showed that the overall cerebral glucose metabolism in females was higher than that in males, whereas male participants had higher glucose metabolism in the bilateral inferior temporal gyri and cerebellum than females. Age-related hypometabolism was found in anterior regions, including the anterior cingulate gyrus. These areas are part of the attentional system, which may decline with aging even in healthy elderly individuals. Highly educated subjects revealed focal hypermetabolism in the right hemisphere and lower recruitment of glucose metabolism in memory tasks. This phenomenon is likely a candidate for a neural substrate of cognitive reserve.
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Affiliation(s)
- Hiroshi Yoshizawa
- Department of Neurology, Neurological Institute, Tokyo Women's Medical University, 8-1, Kawadacho, Shinjuku, Tokyo 162-8666, Japan.
| | - Yunglin Gazes
- Cognitive Neuroscience Division, Department of Neurology and Taub Institute, Columbia University College of Physicians and Surgeons, New York, NY, USA
| | - Yaakov Stern
- Cognitive Neuroscience Division, Department of Neurology and Taub Institute, Columbia University College of Physicians and Surgeons, New York, NY, USA
| | - Yoko Miyata
- Department of Diagnostic Imaging and Nuclear Medicine, Tokyo Women's Medical University, Shinjuku, Tokyo, Japan
| | - Shinichiro Uchiyama
- Department of Neurology, Neurological Institute, Tokyo Women's Medical University, 8-1, Kawadacho, Shinjuku, Tokyo 162-8666, Japan
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Jokinen TS, Haaparanta-Solin M, Viitmaa R, Grönroos TJ, Johansson J, Bergamasco L, Snellman M, Metsähonkala L. FDG-PET in healthy and epileptic Lagotto Romagnolo dogs and changes in brain glucose uptake with age. Vet Radiol Ultrasound 2013; 55:331-41. [PMID: 24354474 DOI: 10.1111/vru.12129] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Accepted: 09/29/2013] [Indexed: 11/29/2022] Open
Abstract
Regional cerebral metabolism and blood flow can be measured noninvasively with positron emission tomography (PET). 2-[(18) F]fluoro-2-deoxy-D-glucose (FDG) widely serves as a PET tracer in human patients with epilepsy to identify the seizure focus. The goal of this prospective study was to determine whether juvenile or adult dogs with focal-onset epilepsy exhibit abnormal cerebral glucose uptake interictally and whether glucose uptake changes with age. We used FDG-PET to examine six Lagotto Romagnolo dogs with juvenile epilepsy, two dogs with adult-onset epilepsy, and five control dogs of the same breed at different ages. Three researchers unaware of dog clinical status visually analyzed co-registered PET and magnetic resonance imaging (MRI) images. Results of the visual PET analyses were compared with electroencephalography (EEG) results. In semiquantitative analysis, relative standard uptake values (SUV) of regions of interest (ROI) drawn to different brain regions were compared between epileptic and control dogs. Visual analysis revealed areas of hypometabolism interictally in five out of six dogs with juvenile epilepsy in the occipital, temporal, and parietal cortex. Changes in EEG occurred in three of these dogs in the same areas where PET showed cortical hypometabolism. Visual analysis showed no abnormalities in cerebral glucose uptake in dogs with adult-onset epilepsy. Semiquantitative analysis detected no differences between epileptic and control dogs. This result emphasizes the importance of visual analysis in FDG-PET studies of epileptic dogs. A change in glucose uptake was also detected with age. Glucose uptake values increased between dog ages of 8 and 28 weeks and then remained constant.
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Affiliation(s)
- Tarja S Jokinen
- Department of Equine and Small Animal Medicine, University of Helsinki, Helsinki, Finland
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39
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Speer AM, Wassermann EM, Benson BE, Herscovitch P, Post RM. Antidepressant efficacy of high and low frequency rTMS at 110% of motor threshold versus sham stimulation over left prefrontal cortex. Brain Stimul 2013; 7:36-41. [PMID: 23928104 DOI: 10.1016/j.brs.2013.07.004] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Revised: 07/08/2013] [Accepted: 07/08/2013] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND While the efficacy of repetitive transcranial magnetic stimulation (rTMS) at 10 Hz over the left prefrontal cortex has been repeatedly demonstrated, it is not clear that the optimal parameters for the treatment of depression have been adequately elucidated. OBJECTIVES We sought to assess the antidepressant effectiveness of high and low frequency at a higher intensity rTMS compared to sham in patients with moderately treatment resistant depression. METHOD The authors conducted a three-week, double-blind, randomized, sham-controlled study of 24 acutely depressed patients given either active 20 Hz (n = 8) or 1 Hz (n = 8) rTMS (at 110% of motor threshold [MT]) or sham treatments (n = 8) over the left prefrontal cortex. Hamilton Depression ratings were analyzed by ANOVA. RESULTS Patients on both frequencies showed greater improvement than on sham, which was associated with minor increases in depression. During open continuation to allow 7 weeks of active treatment in all individuals, additional improvement was observed. CONCLUSIONS The results seen here using 110% of MT for 3 weeks were more robust than those of previous studies of 1-Hz or 20-Hz rTMS for 2 weeks (at 80% and 100% of MT). The results also raise the possibility that both high and low frequency rTMS over left prefrontal cortex (and not just low frequency over the right prefrontal cortex) exert antidepressant effects, but further work is required to assess what parameters may be most effective in general and for a given individual.
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Affiliation(s)
- Andrew M Speer
- Laboratory of Brain and Cognition, 4804 Montgomery Avenue, Bethesda, MD 20814, USA
| | | | | | | | - Robert M Post
- Bipolar Collaborative Network, 5415 W. Cedar Lane, Suite 201-B, Bethesda, MD 20814, USA.
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Generative FDG-PET and MRI model of aging and disease progression in Alzheimer's disease. PLoS Comput Biol 2013; 9:e1002987. [PMID: 23592957 PMCID: PMC3616972 DOI: 10.1371/journal.pcbi.1002987] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Accepted: 01/27/2013] [Indexed: 11/19/2022] Open
Abstract
The failure of current strategies to provide an explanation for controversial findings on the pattern of pathophysiological changes in Alzheimer's Disease (AD) motivates the necessity to develop new integrative approaches based on multi-modal neuroimaging data that captures various aspects of disease pathology. Previous studies using [18F]fluorodeoxyglucose positron emission tomography (FDG-PET) and structural magnetic resonance imaging (sMRI) report controversial results about time-line, spatial extent and magnitude of glucose hypometabolism and atrophy in AD that depend on clinical and demographic characteristics of the studied populations. Here, we provide and validate at a group level a generative anatomical model of glucose hypo-metabolism and atrophy progression in AD based on FDG-PET and sMRI data of 80 patients and 79 healthy controls to describe expected age and symptom severity related changes in AD relative to a baseline provided by healthy aging. We demonstrate a high level of anatomical accuracy for both modalities yielding strongly age- and symptom-severity- dependant glucose hypometabolism in temporal, parietal and precuneal regions and a more extensive network of atrophy in hippocampal, temporal, parietal, occipital and posterior caudate regions. The model suggests greater and more consistent changes in FDG-PET compared to sMRI at earlier and the inversion of this pattern at more advanced AD stages. Our model describes, integrates and predicts characteristic patterns of AD related pathology, uncontaminated by normal age effects, derived from multi-modal data. It further provides an integrative explanation for findings suggesting a dissociation between early- and late-onset AD. The generative model offers a basis for further development of individualized biomarkers allowing accurate early diagnosis and treatment evaluation.
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Shen X, Liu H, Hu Z, Hu H, Shi P. The relationship between cerebral glucose metabolism and age: report of a large brain PET data set. PLoS One 2012; 7:e51517. [PMID: 23284706 PMCID: PMC3527454 DOI: 10.1371/journal.pone.0051517] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2012] [Accepted: 11/05/2012] [Indexed: 11/19/2022] Open
Abstract
Cerebral glucose metabolism is a reliable index of neural activity and may provide evidence for brain function in healthy adults. We studied the correlation between cerebral glucose metabolism and age under the resting-state in both sexes with position emission tomography. Statistical test of age effect on cerebral glucose metabolism was performed using the statistical parametric mapping software with a voxel-by-voxel approach (p=0.05 family wise error corrected, 100-voxel threshold). The subjects consisted of 108 females (mean ± S.D. = 45 ± 10 years) and 126 males (mean ± S.D. = 49 ± 11 years). We showed here that brain activity in the frontal and temporal lobes in both sexes decreased significantly with normal aging. The glucose metabolism in the caudate bilaterally showed a negative correlation with age in males, but not in females. Few regions in males were shown with an increased glucose metabolism with age. Although the mechanisms of brain aging are still unknown, a map of brain areas susceptible to age was described in this report.
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Affiliation(s)
- Xiaoyan Shen
- State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou, China
| | - Huafeng Liu
- State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou, China
- B. Thomas Golisano College of Computing and Information Sciences, Rochester Institute of Technology, Rochester, New York, United States of America
- * E-mail: (HL); (ZH); (HH)
| | - Zhenghui Hu
- State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou, China
- * E-mail: (HL); (ZH); (HH)
| | - Hongjie Hu
- Department of Radiology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China
- * E-mail: (HL); (ZH); (HH)
| | - Pengcheng Shi
- B. Thomas Golisano College of Computing and Information Sciences, Rochester Institute of Technology, Rochester, New York, United States of America
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Li CT, Hsieh JC, Wang SJ, Yang BH, Bai YM, Lin WC, Lan CC, Su TP. Differential relations between fronto-limbic metabolism and executive function in patients with remitted bipolar I and bipolar II disorder. Bipolar Disord 2012; 14:831-42. [PMID: 23167933 DOI: 10.1111/bdi.12017] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
OBJECTIVES The aim of this study was to investigate the relationship between resting brain glucose metabolism and cognitive profiles in patients with remitted bipolar I disorder (BD-I) and bipolar II disorder (BD-II). We hypothesized that BD-I patients (compared to BD-II patients) would perform worse on tests of cognitive function because of abnormal metabolism in the prefrontal cortex and other mood-related brain areas. METHODS Thirty-four patients with remitted bipolar disorder (BD) (BD-I = 17, BD-II = 17) under treatment and 17 well-matched healthy controls received both fluorodeoxyglucose ((18) F-FDG) positron emission tomography (PET) and neuropsychological tests of attention, memory, and executive function. RESULTS Clinical features in patients with BD-I and BD-II were comparable. Executive function, as indicated by performance on the Wisconsin Card Sorting Test, was significantly worse (i.e., higher percentage of errors, lower percentage of conceptual level responses, and fewer categories completed) in BD-I patients than in BD-II patients and healthy subjects. No difference in attention and memory tests was found among these three groups. Brain PET analysis showed that BD-I patients (compared to BD-II patients) had significantly lower glucose uptake in the bilateral anterior cingulum, insula, striatum, and part of the prefrontal cortex, and higher glucose uptake in the left parahippocampus. Further analyses revealed significant correlations between poor executive function and abnormal glucose uptake in other brain areas in BD-I patients. CONCLUSIONS There are neurobiological differences between subtypes of BD. BD-I is associated with more impaired fronto-limbic circuitry, which might account for reduced executive function in BD-I patients during remission.
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Affiliation(s)
- Cheng-Ta Li
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan
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McGlade E, Locatelli A, Hardy J, Kamiya T, Morita M, Morishita K, Sugimura Y, Yurgelun-Todd D. Improved Attentional Performance Following Citicoline Administration in Healthy Adult Women. ACTA ACUST UNITED AC 2012. [DOI: 10.4236/fns.2012.36103] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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44
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Nugent S, Croteau E, Pifferi F, Fortier M, Tremblay S, Turcotte E, Cunnane SC. Brain and systemic glucose metabolism in the healthy elderly following fish oil supplementation. Prostaglandins Leukot Essent Fatty Acids 2011; 85:287-91. [PMID: 21795034 DOI: 10.1016/j.plefa.2011.04.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Cerebral metabolic rate of glucose (CMRg) is lower in individuals affected by cognitive decline and dementia, especially in Alzheimer's disease. However, as yet there is no consensus as to whether CMRg decreases during healthy aging. Epidemiological studies show that weekly consumption of fish abundant in ω3 fatty acids has a protective effect on cognition during aging. Thus, the primary objective of this human study was to use positron emission tomography analysis with (18)F-fluorodeoxyglucose to evaluate whether supplementation with a fish oil rich in ω3 fatty acids increases cerebral glucose metabolism in young or elderly adults. Healthy young (23±5y old; n=5) and elderly (76±3y old; n=6) women and men were included in the study. Semi-quantitative expression of the data as 'standardized uptake values' showed that elderly participants had significantly lower cerebral glucose metabolism compared with the young group. However, when expressed quantitatively a CMRg, there was no effect of age or ω3 supplementation on glucose metabolism in any of the brains regions studied. Higher plasma triglyceride levels and higher plasma insulin levels were associated with lower CMRg in several regions, suggesting that a trend towards the metabolic syndrome may be associated with cerebral hypometabolism. We conclude that under these experimental conditions, ω3 supplementation did not affect brain glucose metabolism in the healthy elderly. Future studies in this area should address whether glucose intolerance or other conditions linked to the metabolic syndrome impact negatively on brain glucose metabolism and cognition.
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Affiliation(s)
- S Nugent
- Research Center on Aging, Université de Sherbrooke, Sherbrooke, Que., Canada J1H 4C4
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Zhang L, Li CT, Su TP, Hu XZ, Lanius RA, Webster MJ, Chung MY, Chen YS, Bai YM, Barker JL, Barrett JE, Li XX, Li H, Benedek DM, Ursano R. P11 expression and PET in bipolar disorders. J Psychiatr Res 2011; 45:1426-31. [PMID: 21722919 DOI: 10.1016/j.jpsychires.2011.06.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Revised: 05/31/2011] [Accepted: 06/08/2011] [Indexed: 11/15/2022]
Abstract
BACKGROUND Bipolar disorder (BD) is a common mental disorder, subdivided into BD-I and BD-II. Currently, few biomarkers differentiate BD-I from BD-II. However, it is suggested that peripheral blood mononuclear cell (PBMC) mRNA levels of p11 and positron emission tomography (PET) might be potential biomarkers for BD. METHODS Healthy controls (HCs), BD-I, and BD-II patients in remission (n = 20 in each group) underwent a resting PET study with the radiotracer [(18)F]-2-deoxy-2-fluoro-d-glucose ((18)F-FDG). PBMC p11 mRNA levels were determined by quantitative real-time PCR. RESULTS Comparing BD patients to HCs, normalized glucose metabolism (NGM) was higher in the hippocampus, parahippocampus, and amygdala, but lower in the anterior cingulate cortex (aCC), medial prefrontal cortex (mPFC), dorsolateral prefrontal cortex (dlPFC), insula and thalamus. Compared to BD-II, BD-I had hypometabolism of glucose in the aCC, bilateral middle and inferior gyrus, insula and striatum, and hypermetabolism of glucose in the left parahippocampus. PBMC p11 mRNA was over-expressed in both BD-I and BD-II, although there was no significant difference in its expression levels between BD-I and B-II patients. Further, there were significant positive correlations between PBMC p11 mRNA and NGM in the mPFC, aCC, left insula, bilateral orbitofrontal cortex (OFC), and left middle, inferior and superior temporal gyri. Also, PBMC p11 mRNA was positively correlated to the number of depressive episodes in BD patients, especially in BD-I patients. DISCUSSION This study demonstrates that PBMC p11 mRNA expression is associated with neural activation in the brain of BD patients and warrants a larger translational study to determine its clinical utility.
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Affiliation(s)
- Lei Zhang
- Center for the Study of Traumatic Stress, Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA.
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Wellstead P, Cloutier M. An energy systems approach to Parkinson's disease. WILEY INTERDISCIPLINARY REVIEWS-SYSTEMS BIOLOGY AND MEDICINE 2011; 3:1-6. [PMID: 21061310 DOI: 10.1002/wsbm.107] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The cause of Parkinson's disease (PD) remains unknown despite it being the second most prevalent neurodegenerative condition. Indeed, there is a growing consensus that there is no single cause, and that PD is a multifactorial systemic condition, in which a number of factors may determine its etiopathogenesis. We describe a systems approach that addresses the multifactorial aspects of PD and overcomes constraints on conventional experimentation imposed by PD's causal complexity, its long temporal duration, and its uniqueness to human brains. Specifically, a mathematical model of brain energy metabolism is used as a core module to which other modules describing cellular processes thought to be associated with PD can be attached and studied in an integrative environment. Employing brain energy usage as the core of a systems approach also enables the potential role that compromised energy metabolism may have in the etiology of PD. Although developed for PD, it has not escaped our attention that the energy systems approach outlined here could also be applied to other neurodegenerative disorders-most notably Alzheimer's disease.
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Curiati PK, Tamashiro-Duran JH, Duran FLS, Buchpiguel CA, Squarzoni P, Romano DC, Vallada H, Menezes PR, Scazufca M, Busatto GF, Alves TCTF. Age-related metabolic profiles in cognitively healthy elders: results from a voxel-based [18F]fluorodeoxyglucose-positron-emission tomography study with partial volume effects correction. AJNR Am J Neuroradiol 2011; 32:560-5. [PMID: 21273352 DOI: 10.3174/ajnr.a2321] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Functional brain variability has been scarcely investigated in cognitively healthy elderly subjects, and it is currently debated whether previous findings of regional metabolic variability are artifacts associated with brain atrophy. The primary purpose of this study was to test whether there is regional cerebral age-related hypometabolism specifically in later stages of life. MATERIALS AND METHODS MR imaging and FDG-PET data were acquired from 55 cognitively healthy elderly subjects, and voxel-based linear correlations between age and GM volume or regional cerebral metabolism were conducted by using SPM5 in images with and without correction for PVE. To investigate sex-specific differences in the pattern of brain aging, we repeated the above voxelwise calculations after dividing our sample by sex. RESULTS Our analysis revealed 2 large clusters of age-related metabolic decrease in the overall sample, 1 in the left orbitofrontal cortex and the other in the right temporolimbic region, encompassing the hippocampus, the parahippocampal gyrus, and the amygdala. The division of our sample by sex revealed significant sex-specific age-related metabolic decrease in the left temporolimbic region of men and in the left dorsolateral frontal cortex of women. When we applied atrophy correction to our PET data, none of the above-mentioned correlations remained significant. CONCLUSIONS Our findings suggest that age-related functional brain variability in cognitively healthy elderly individuals is largely secondary to the degree of regional brain atrophy, and the findings provide support to the notion that appropriate PVE correction is a key tool in neuroimaging investigations.
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Affiliation(s)
- P K Curiati
- Neuroimaging in Psychiatry Laboratory, São Paulo University Medical School, Brazil
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Cunnane S, Nugent S, Roy M, Courchesne-Loyer A, Croteau E, Tremblay S, Castellano A, Pifferi F, Bocti C, Paquet N, Begdouri H, Bentourkia M, Turcotte E, Allard M, Barberger-Gateau P, Fulop T, Rapoport SI. Brain fuel metabolism, aging, and Alzheimer's disease. Nutrition 2011; 27:3-20. [PMID: 21035308 PMCID: PMC3478067 DOI: 10.1016/j.nut.2010.07.021] [Citation(s) in RCA: 390] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2010] [Revised: 07/28/2010] [Accepted: 07/28/2010] [Indexed: 12/14/2022]
Abstract
Lower brain glucose metabolism is present before the onset of clinically measurable cognitive decline in two groups of people at risk of Alzheimer's disease--carriers of apolipoprotein E4, and in those with a maternal family history of AD. Supported by emerging evidence from in vitro and animal studies, these reports suggest that brain hypometabolism may precede and therefore contribute to the neuropathologic cascade leading to cognitive decline in AD. The reason brain hypometabolism develops is unclear but may include defects in brain glucose transport, disrupted glycolysis, and/or impaired mitochondrial function. Methodologic issues presently preclude knowing with certainty whether or not aging in the absence of cognitive impairment is necessarily associated with lower brain glucose metabolism. Nevertheless, aging appears to increase the risk of deteriorating systemic control of glucose utilization, which, in turn, may increase the risk of declining brain glucose uptake, at least in some brain regions. A contributing role of deteriorating glucose availability to or metabolism by the brain in AD does not exclude the opposite effect, i.e., that neurodegenerative processes in AD further decrease brain glucose metabolism because of reduced synaptic functionality and hence reduced energy needs, thereby completing a vicious cycle. Strategies to reduce the risk of AD by breaking this cycle should aim to (1) improve insulin sensitivity by improving systemic glucose utilization, or (2) bypass deteriorating brain glucose metabolism using approaches that safely induce mild, sustainable ketonemia.
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Affiliation(s)
- Stephen Cunnane
- Research Center on Aging, Health and Social Services Center-Sherbrooke University Geriatrics Institute, Université de Sherbrooke, Sherbrooke, QC, Canada; Department of Medicine, Université de Sherbrooke, Sherbrooke, QC, Canada; Department of Physiology and Biophysics, Université de Sherbrooke, Sherbrooke, QC, Canada.
| | - Scott Nugent
- Research Center on Aging, Health and Social Services Center-Sherbrooke University Geriatrics Institute, Université de Sherbrooke, Sherbrooke, QC, Canada; Department of Physiology and Biophysics, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Maggie Roy
- Research Center on Aging, Health and Social Services Center-Sherbrooke University Geriatrics Institute, Université de Sherbrooke, Sherbrooke, QC, Canada; Department of Physiology and Biophysics, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Alexandre Courchesne-Loyer
- Research Center on Aging, Health and Social Services Center-Sherbrooke University Geriatrics Institute, Université de Sherbrooke, Sherbrooke, QC, Canada; Department of Physiology and Biophysics, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Etienne Croteau
- Department of Radiobiology and Nuclear Medicine, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Sébastien Tremblay
- Research Center on Aging, Health and Social Services Center-Sherbrooke University Geriatrics Institute, Université de Sherbrooke, Sherbrooke, QC, Canada; Department of Radiobiology and Nuclear Medicine, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Alex Castellano
- Research Center on Aging, Health and Social Services Center-Sherbrooke University Geriatrics Institute, Université de Sherbrooke, Sherbrooke, QC, Canada
| | | | - Christian Bocti
- Research Center on Aging, Health and Social Services Center-Sherbrooke University Geriatrics Institute, Université de Sherbrooke, Sherbrooke, QC, Canada; Department of Medicine, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Nancy Paquet
- Department of Radiobiology and Nuclear Medicine, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Hadi Begdouri
- Department of Radiobiology and Nuclear Medicine, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - M'hamed Bentourkia
- Department of Radiobiology and Nuclear Medicine, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Eric Turcotte
- Department of Radiobiology and Nuclear Medicine, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Michèle Allard
- UMR CNRS 5231 and Ecole Pratique des Hautes Etudes, France
| | - Pascale Barberger-Gateau
- INSERM U897, Bordeaux F-33076, France; Université Victor Segalen Bordeaux 2, Bordeaux F-33076, France
| | - Tamas Fulop
- Research Center on Aging, Health and Social Services Center-Sherbrooke University Geriatrics Institute, Université de Sherbrooke, Sherbrooke, QC, Canada; Department of Medicine, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Stanley I Rapoport
- Brain Physiology and Metabolism Section, National Institute of Aging, Bethesda, MD, USA
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Li CT, Wang SJ, Hirvonen J, Hsieh JC, Bai YM, Hong CJ, Liou YJ, Su TP. Antidepressant mechanism of add-on repetitive transcranial magnetic stimulation in medication-resistant depression using cerebral glucose metabolism. J Affect Disord 2010; 127:219-29. [PMID: 20598753 DOI: 10.1016/j.jad.2010.05.028] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2010] [Revised: 05/24/2010] [Accepted: 05/29/2010] [Indexed: 11/27/2022]
Abstract
BACKGROUND Add-on repetitive transcranial magnetic stimulation (rTMS) is effective in treating medication-resistant depression (MRD), but little is known about the rTMS antidepressant mechanism and pathophysiology underlying MRD. METHODS Twenty MRD patients received 2 weeks of navigated add-on rTMS to the left dorsolateral prefrontal cortex (DLPFC). Treatment response was defined as a ≥50% decrease in HDRS after treatment. Cerebral glucose metabolism was measured from all MRD patients twice, before and 3 months after rTMS, and from 20 healthy controls once at baseline. RESULTS At baseline, MRD subjects presented significant hypometabolism at the bilateral DLPFC and anterior cingulum, as well as hypermetabolism at several limbic and subcortical regions compared to the controls. Higher metabolism at the medial PFC and rostral anterior cingulum, and lower metabolism at the limbic structures, including the left parahippocampus and fusiform gyrus, predicted a response to rTMS. After successful rTMS treatment, the abnormally elevated metabolism in the left middle temporal cortex and fusiform gyrus decreased significantly, suggesting a reversal of metabolic imbalances. However, the overall metabolic pattern was still abnormal, even after their depression was under control. In contrast, the non-responders showed a worsening pattern of increased metabolism in the bilateral temporal cortex and fusiform gyrus. CONCLUSIONS The antidepressant mechanism of add-on rTMS may be reflected as suppression of hyperactivity in the left temporal cortex and fusiform gyrus, perhaps through enhancing the function of the medial prefrontal cortex and anterior cingulum. The limbic-cortical dysregulation of glucose metabolism might be a trait of an underlying mechanism of MRD.
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Affiliation(s)
- Cheng-Ta Li
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan
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Kumar A, Juhász C, Asano E, Sood S, Muzik O, Chugani HT. Objective detection of epileptic foci by 18F-FDG PET in children undergoing epilepsy surgery. J Nucl Med 2010; 51:1901-7. [PMID: 21078805 DOI: 10.2967/jnumed.110.075390] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
UNLABELLED PET has been used for the presurgical localization of epileptic foci for more than 20 y; still, its clinical role in children with intractable epilepsy remains unclear, largely because of variable analytic approaches and different outcome measures. The purpose of the present study was to evaluate and optimize the performance (lateralization and lobar localization value of epileptic foci) of objective voxel-based analysis of (18)F-FDG PET scans in a pediatric epilepsy population. METHODS Twenty children with intractable focal epilepsy (mean age ± SD, 11 ± 4 y; age range, 6-18 y) who underwent interictal (18)F-FDG PET, followed by 2-stage epilepsy surgery with chronic subdural electrocorticographic monitoring, and were seizure-free after surgery were included in this study. PET images were analyzed using both a visual-analysis and a statistical parametric mapping (SPM) method. Lateralization value and performance of lobar localization (in lateral and medial surfaces of all lobes, total of 8 regions in each epileptic hemisphere), calculated for 3 different statistical thresholds, were determined against intracranial electrocorticography-determined seizure-onset region and surgical resection site. RESULTS SPM using a statistical threshold of P less than 0.001 provided 100% correct lateralization, which was better than visual assessment (90%). Although visual and SPM analyses (with both P < 0.001 and P < 0.0001 thresholds) performed similarly well (with a sensitivity and specificity of 74% or above) in the localization of seizure-onset regions, SPM detected 7 of 9 seizure-onset regions, mostly in medial cortices, that were missed by visual assessment. Also, SPM performed equally well in both hemispheres, compared with visual analysis, which performed better in the left hemisphere. No statistical difference in performance was observed between visual and SPM analyses of children with abnormal versus normal MRI findings or of children with gliosis versus developmental pathology. Clinical variables, such as age, duration of epilepsy, age of seizure onset, and time between PET and last seizure, showed no correlation with sensitivity or specificity of either visual analysis or SPM analysis. CONCLUSION SPM analysis, using a young adult control group, can be used as a complementary objective analytic method in identifying epileptogenic lobar regions by (18)F-FDG PET in children older than 6 y.
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Affiliation(s)
- Ajay Kumar
- Department of Pediatrics, Children's Hospital of Michigan, Detroit Medical Center, Wayne State University School of Medicine, Detroit, Michigan 48201, USA
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