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Christova P, James LM, Georgopoulos AP. Negative association between neurovascular coupling and cortical gray matter volume during the lifespan. J Neurophysiol 2024; 131:778-784. [PMID: 38478986 DOI: 10.1152/jn.00005.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 02/20/2024] [Accepted: 03/13/2024] [Indexed: 04/16/2024] Open
Abstract
Recent studies have established the moment-to-moment turnover of the blood-oxygen-level-dependent signal (TBOLD) at resting state as a key measure of local cortical brain function. Here, we sought to extend that line of research by evaluating TBOLD in 70 cortical areas with respect to corresponding brain volume, age, and sex across the lifespan in 1,344 healthy participants including 633 from the Human Connectome Project (HCP)-Development cohort (294 males and 339 females, age range 8-21 yr) and 711 healthy participants from HCP-Aging cohort (316 males and 395 females, 36-90 yr old). In both groups, we found that 1) TBOLD increased with age, 2) volume decreased with age, and 3) TBOLD and volume were highly significantly negatively correlated, independent of age. The inverse association between TBOLD and volume was documented in nearly all 70 brain areas and for both sexes, with slightly stronger associations documented for males. The strong correspondence between TBOLD and volume across age and sex suggests a common influence such as chronic neuroinflammation contributing to reduced cortical volume and increased TBOLD across the lifespan.NEW & NOTEWORTHY We report a significant negative association between resting functional magnetic resonance imaging (fMRI) blood-oxygen-level-dependent (BOLD) signal turnover (TBOLD) and cortical gray matter volume across the lifespan, such that TBOLD increased whereas volume decreased. We attribute this association to a hypothesized chronic, low-grade neuroinflammation, probably induced by various neurotropic pathogens, including human herpes viruses known to be dormant in the brain in a latent state and reactivated by stress, fever, and various environmental exposures, such as ultraviolet light.
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Affiliation(s)
- Peka Christova
- Department of Veterans Affairs Health Care System, The Neuroimaging Research Group, Brain Sciences Center, Minneapolis, Minnesota, United States
- Department of Neuroscience, University of Minnesota Medical School, Minneapolis, Minnesota, United States
- Cognitive Sciences Center, University of Minnesota, Minneapolis, Minnesota, United States
| | - Lisa M James
- Department of Veterans Affairs Health Care System, The Neuroimaging Research Group, Brain Sciences Center, Minneapolis, Minnesota, United States
- Department of Neuroscience, University of Minnesota Medical School, Minneapolis, Minnesota, United States
- Cognitive Sciences Center, University of Minnesota, Minneapolis, Minnesota, United States
- Department of Psychiatry, University of Minnesota Medical School, Minneapolis, Minnesota, United States
| | - Apostolos P Georgopoulos
- Department of Veterans Affairs Health Care System, The Neuroimaging Research Group, Brain Sciences Center, Minneapolis, Minnesota, United States
- Department of Neuroscience, University of Minnesota Medical School, Minneapolis, Minnesota, United States
- Cognitive Sciences Center, University of Minnesota, Minneapolis, Minnesota, United States
- Department of Psychiatry, University of Minnesota Medical School, Minneapolis, Minnesota, United States
- Department of Neurology, University of Minnesota Medical School, Minneapolis, Minnesota, United States
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Christova P, Uğurbil K, Georgopoulos AP. Heritability of brain neurovascular coupling. J Neurophysiol 2022; 128:1307-1311. [PMID: 36259671 PMCID: PMC9665956 DOI: 10.1152/jn.00402.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 10/13/2022] [Indexed: 11/22/2022] Open
Abstract
The moment-to-moment variation of neurovascular coupling in the brain was determined by computing the moment-to-moment turnover of the blood-oxygen-level-dependent signal (TBOLD) at resting state. Here we show that 1) TBOLD is heritable, 2) its heritability estimates are highly correlated between left and right hemispheres, and 3) the degree of its heritability is determined, in part, by the anatomical proximity of the brain areas involved. We also show that the regional distribution of TBOLD in the cortex is significantly associated with that of the vesicular acetylcholine transporter. These findings establish that TBOLD as a key heritable measure of local cortical brain function captured by neurovascular coupling.NEW & NOTEWORTHY Here we show that the sample-to-sample turnover of the resting state fMRI blood-oxygen-level-dependent turnover (TBOLD) is heritable, the left and right hemisphere TBOLD heritabilities are highly correlated, and TBOLD heritability varies among cortical areas. Moreover, we documented that TBOLD is associated with the regional cortical distribution of the vesicular acetylcholine transporter.
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Affiliation(s)
- Peka Christova
- Department of Veterans Affairs Health Care System, The Functional Neuroimaging Research Group, Brain Sciences Center, Minneapolis, Minnesota
- Department of Neuroscience, University of Minnesota Medical School, Minneapolis, Minnesota
| | - Kâmil Uğurbil
- Department of Neuroscience, University of Minnesota Medical School, Minneapolis, Minnesota
- Center for Magnetic Resonance Research, Department of Radiology, University of Minnesota Medical School, Minneapolis, Minnesota
| | - Apostolos P Georgopoulos
- Department of Veterans Affairs Health Care System, The Functional Neuroimaging Research Group, Brain Sciences Center, Minneapolis, Minnesota
- Department of Neuroscience, University of Minnesota Medical School, Minneapolis, Minnesota
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James LM, Leuthold AF, Georgopoulos AP. MEG neural signature of sexual trauma in women veterans with PTSD. Exp Brain Res 2022; 240:2135-2142. [PMID: 35786746 DOI: 10.1007/s00221-022-06405-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Accepted: 06/18/2022] [Indexed: 11/28/2022]
Abstract
Previous research has documented the utility of synchronous neural interactions (SNI) in classifying women veterans with and without posttraumatic stress disorder (PTSD) and other trauma-related outcomes based on functional connectivity using magnetoencephalography (MEG). Here, we extend that line of research to evaluate trauma-specific PTSD neural signatures with MEG in women veterans. Participants completed diagnostic interviews and underwent a task-free MEG scan from which SNI was computed. Thirty-five women veterans were diagnosed with PTSD due to sexual trauma and sixteen with PTSD due to non-sexual trauma. Strength of SNI was compared in women with and without sexual trauma, and linear discriminant analysis was used to classify the brain patterns of women with PTSD due to sexual trauma and non-sexual trauma. Comparison of SNI strength between the two groups revealed widespread hypercorrelation in women with sexual trauma relative to those without sexual trauma. Furthermore, using SNI, the brains of participants were classified as sexual trauma or non-sexual trauma with 100% accuracy. These findings bolster evidence supporting the utility of task-free SNI and suggest that neural signatures of PTSD are trauma-specific.
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Affiliation(s)
- Lisa M James
- The PTSD Research Group, Brain Sciences Center (11B), Department of Veterans Affairs Health Care System, One Veterans Drive, Minneapolis, MN, USA. .,Department of Neuroscience, University of Minnesota Medical School, Minneapolis, MN, USA. .,Department of Psychiatry, University of Minnesota Medical School, Minneapolis, MN, USA. .,Center for Cognitive Sciences, University of Minnesota, Minneapolis, MN, USA.
| | - Arthur F Leuthold
- The PTSD Research Group, Brain Sciences Center (11B), Department of Veterans Affairs Health Care System, One Veterans Drive, Minneapolis, MN, USA.,Department of Neuroscience, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Apostolos P Georgopoulos
- The PTSD Research Group, Brain Sciences Center (11B), Department of Veterans Affairs Health Care System, One Veterans Drive, Minneapolis, MN, USA.,Department of Neuroscience, University of Minnesota Medical School, Minneapolis, MN, USA.,Department of Psychiatry, University of Minnesota Medical School, Minneapolis, MN, USA.,Center for Cognitive Sciences, University of Minnesota, Minneapolis, MN, USA.,Department of Neurology, University of Minnesota, Minneapolis, MN, USA
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