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Ghinda DC, Salimpour Y, Crone NE, Kang J, Anderson WS. Dynamical Analysis of Seizure in Epileptic Brain: a Dynamic Phase-Amplitude Coupling Estimation Approach. Annu Int Conf IEEE Eng Med Biol Soc 2021; 2021:5970-5973. [PMID: 34892478 DOI: 10.1109/embc46164.2021.9629778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Cross-frequency coupling in general and phase-amplitude coupling (PAC) as a particular form of it, provides an opportunity to investigate the complex interactions between neural oscillations in the human brain and neurological disorders such as epilepsy. Using PAC detection methods on temporal sliding windows, we developed a map of dynamic PAC evolution to investigate the spatiotemporal changes occurring during ictal transitions in a patient with intractable mesial temporal lobe epilepsy. The map is built by computing the modulation index between the amplitude of high frequency oscillations and the phase of lower frequency rhythms from the intracranial stereoelectroencephalography recordings during seizure. Our preliminary results show early abnormal PAC changes occurring in the preictal state prior to the occurrence of clinical or visible electrographic seizure onset, and suggest that dynamic PAC measures may serve as a potential clinical technique for analyzing seizure dynamics.Clinical Relevance-Application of a dynamic temporal PAC map as a new tool may provide novel insights into the neurophysiology of epileptic seizure activity and its spatio-temporal dynamics.
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Ghinda DC, Yang Y, Wu S, Lu J, Su L, Damiani S, Tumati S, Jansen G, Duffau H, Wu JS, Northoff G. Personalized Multimodal Demarcation of Peritumoral Tissue in Glioma. JCO Precis Oncol 2020; 4:1128-1140. [PMID: 35050774 DOI: 10.1200/po.20.00115] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
PURPOSE Gliomas are life-threatening brain tumors, and the extent of surgical resection is one of the strongest influences on survival rate. However, the proper distinction of infiltrated tissue remains elusive. The aim of this study was to use multimodal analyses to demarcate peritumoral tissue (PT) from tumoral (TT) and healthy tissue (HT). METHODS A total of 40 patients with histologically confirmed glioma were recruited. We analyzed resting-state functional magnetic resonance imaging (rs-fMRI) using the voxel-based mean blood-oxygen-level-dependent (BOLD) signal and the corresponding structural MRI (s-MRI) alongside RNA sequencing, whole-exome sequencing, and histology results of biopsy samples obtained from PT, HT, and TT. RESULTS We demarcated a functionally defined PT area where the mean BOLD signal gradually decreased near the edge of the tumor and extended beyond the TT borders (as defined by s-MRI), which was confirmed on a case-by-case basis. Correspondingly, genetic analyses showed a gene expression pattern and mutational landscape of the PT that were distinct from that seen in HT and TT. The genetic characterization of PT relative to HT and TT converged with the MRI-defined PT zones. This was confirmed in three individual cases after additional histologic analysis. A wider PT was associated with a longer progression-free survival, which suggests PT might act as an intermediate area between TT and HT. CONCLUSION Combined multimodal imaging and genetic analyses can allow for an objective demarcation of the PT in glioma and a robust classification of the degree of infiltration of the PT. These findings could help improve both neurosurgical resection and radio-oncologic therapy.
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Affiliation(s)
- Diana C Ghinda
- Department of Neurosurgery, The Ottawa Hospital, University of Ottawa, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada.,Glioma Surgery Division, Neurologic Surgery Department, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China.,Mind, Brain Imaging, and Neuroethics, Institute of Mental Health Research, University of Ottawa, Ottawa, Ontario, Canada
| | - Yufei Yang
- Genetron Health (Beijing) Co Ltd, Beijing, China
| | - Shuai Wu
- Glioma Surgery Division, Neurologic Surgery Department, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Junfeng Lu
- Glioma Surgery Division, Neurologic Surgery Department, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Lan Su
- Genetron Health (Beijing) Co Ltd, Beijing, China
| | - Stefano Damiani
- Department of Brain and Behavioral Science, University of Pavia, Pavia, Italy
| | - Shankar Tumati
- Mind, Brain Imaging, and Neuroethics, Institute of Mental Health Research, University of Ottawa, Ottawa, Ontario, Canada
| | - Gerard Jansen
- Department of Neuropathology, The Ottawa Hospital, Ottawa, Ontario, Canada
| | - Hugues Duffau
- Department of Neurosurgery, Hôpital Gui de Chauliac, Montpellier University Medical Center, Montpellier, France.,Brain Plasticity, Stem Cells, and Glial Tumors Team, National Institute for Health and Medical Research, Montpellier, France
| | - Jin-Song Wu
- Glioma Surgery Division, Neurologic Surgery Department, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Georg Northoff
- Mind, Brain Imaging, and Neuroethics, Institute of Mental Health Research, University of Ottawa, Ottawa, Ontario, Canada
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Ghinda DC, Wu JS, Duncan NW, Northoff G. How much is enough-Can resting state fMRI provide a demarcation for neurosurgical resection in glioma? Neurosci Biobehav Rev 2017; 84:245-261. [PMID: 29198588 DOI: 10.1016/j.neubiorev.2017.11.019] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 11/20/2017] [Accepted: 11/27/2017] [Indexed: 01/09/2023]
Abstract
This study represents a systematic review of the insights provided by resting state functional MRI (rs-fMRI) use in the glioma population. Following PRISMA guidelines, 45 studies were included in the review and were classified in glioma-related neuronal changes (n=28) and eloquent area localization (n=17). Despite the heterogeneous nature of the studies, there is considerable evidence of diffuse functional reorganization occurring in the setting of gliomas with local and interhemispheric functional connectivity alterations involving different functional networks. The studies showed evidence of decreased long distance functional connectivity and increased global local efficiency occurring in the setting of gliomas. The tumour grade seems to correlate with distinct functional connectivity changes. Overall, there is a potential clinical utility of rs-fMRI for identifying the functional brain network disruptions occurring in the setting of gliomas. Further studies utilizing standardized analytical methods are required to elucidate the mechanism through which gliomas induce global changes in brain connectivity.
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Affiliation(s)
- Diana C Ghinda
- Ottawa Hospital Research Institute, University of Ottawa, Division of Neurosurgery, The Ottawa Hospital, 1053 Carling Avenue, Ottawa, ON, K1Y 4E9, Canada; Mind, Brain Imaging and Neuroethics, Canada Research Chair, EJLB-Michael Smith Chair for Neuroscience and Mental Health, Royal Ottawa Mental Health Centre, University of Ottawa Institute of Mental Health Research, 1145 Carling Avenue, Rm. 6435, Ottawa, ON, K1Z 7K4, Canada.
| | - Jin-Song Wu
- Glioma Surgery Division, Department of Neurological Surgery, Huashan Hospital, Fudan University, 518 Wuzhong E Rd, Shanghai, China.
| | - Niall W Duncan
- Brain and Consciousness Research Center, Taipei Medical University-Shuang Ho Hospital, 250 Wu-Xing Street, Taipei, 11031, Taiwan.
| | - Georg Northoff
- Mind, Brain Imaging and Neuroethics, Canada Research Chair, EJLB-Michael Smith Chair for Neuroscience and Mental Health, Royal Ottawa Mental Health Centre, University of Ottawa Institute of Mental Health Research, 1145 Carling Avenue, Rm. 6435, Ottawa, ON, K1Z 7K4, Canada; Mental Health Center/7th Hospital, Zhejiang University School of Medicine, 305 Tianmu Road, Hangzhou, Zhejiang Province, 310013, China.
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