Allison C Engstrom, John Paul M Alitin, Arunima Kapoor, Shubir Dutt, Trevor Lohman, Isabel J Sible, Anisa J Marshall, Fatemah Shenasa, Aimée Gaubert, Farrah Ferrer, Amy Nguyen, David Robert Bradford, Kathleen Rodgers, Lorena Sordo, Elizabeth Head, Xingfeng Shao, Danny J J Wang, Daniel A Nation
{"title":"患有和未患有轻度认知障碍和记忆缺陷的老年人在静息状态下的自发性脑血管反应性。","authors":"Allison C Engstrom, John Paul M Alitin, Arunima Kapoor, Shubir Dutt, Trevor Lohman, Isabel J Sible, Anisa J Marshall, Fatemah Shenasa, Aimée Gaubert, Farrah Ferrer, Amy Nguyen, David Robert Bradford, Kathleen Rodgers, Lorena Sordo, Elizabeth Head, Xingfeng Shao, Danny J J Wang, Daniel A Nation","doi":"10.1002/alz.14396","DOIUrl":null,"url":null,"abstract":"<p><strong>Introduction: </strong>Older adults with mild cognitive impairment (MCI) exhibit deficits in cerebrovascular reactivity (CVR), suggesting CVR is a biomarker for vascular contributions to MCI. This study examined if spontaneous CVR is associated with MCI and memory impairment.</p><p><strong>Methods: </strong>One hundred sixty-one older adults free of dementia or major neurological/psychiatric disorders were recruited. Participants underwent clinical interviews, cognitive testing, venipuncture for Alzheimer's disease (AD) biomarkers, and brain magnetic resonance imaging. Spontaneous CVR was quantified during 5 minutes of rest. Respiratory gases analyzed through nasal cannula to quantify end-tidal carbon dioxide (<sub>ET</sub>CO<sub>2</sub>) levels were used to estimate CVR.</p><p><strong>Results: </strong>Whole brain CVR was negatively associated with age, but not MCI. Lower CVR in the parahippocampal gyrus (PHG) was found in participants with MCI and was linked to worse memory performance on memory tests. Results remained significant after adjusting for AD biomarkers and vascular risk factors.</p><p><strong>Discussion: </strong>Spontaneous CVR deficits in the PHG are observed in older adults with MCI and memory impairment, suggesting medial temporal microvascular dysfunction is observed in cognitive decline.</p><p><strong>Highlights: </strong>Aging is associated with decline in whole brain spontaneous cerebrovascular reactivity (CVR). Older adults with mild cognitive impairment exhibit deficits in spontaneous CVR in the parahippocampal gyrus (PHG). Memory impairment is correlated with reduced spontaneous CVR in the PHG.</p>","PeriodicalId":7471,"journal":{"name":"Alzheimer's & Dementia","volume":" ","pages":""},"PeriodicalIF":13.0000,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Spontaneous cerebrovascular reactivity at rest in older adults with and without mild cognitive impairment and memory deficits.\",\"authors\":\"Allison C Engstrom, John Paul M Alitin, Arunima Kapoor, Shubir Dutt, Trevor Lohman, Isabel J Sible, Anisa J Marshall, Fatemah Shenasa, Aimée Gaubert, Farrah Ferrer, Amy Nguyen, David Robert Bradford, Kathleen Rodgers, Lorena Sordo, Elizabeth Head, Xingfeng Shao, Danny J J Wang, Daniel A Nation\",\"doi\":\"10.1002/alz.14396\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Introduction: </strong>Older adults with mild cognitive impairment (MCI) exhibit deficits in cerebrovascular reactivity (CVR), suggesting CVR is a biomarker for vascular contributions to MCI. This study examined if spontaneous CVR is associated with MCI and memory impairment.</p><p><strong>Methods: </strong>One hundred sixty-one older adults free of dementia or major neurological/psychiatric disorders were recruited. Participants underwent clinical interviews, cognitive testing, venipuncture for Alzheimer's disease (AD) biomarkers, and brain magnetic resonance imaging. Spontaneous CVR was quantified during 5 minutes of rest. Respiratory gases analyzed through nasal cannula to quantify end-tidal carbon dioxide (<sub>ET</sub>CO<sub>2</sub>) levels were used to estimate CVR.</p><p><strong>Results: </strong>Whole brain CVR was negatively associated with age, but not MCI. Lower CVR in the parahippocampal gyrus (PHG) was found in participants with MCI and was linked to worse memory performance on memory tests. Results remained significant after adjusting for AD biomarkers and vascular risk factors.</p><p><strong>Discussion: </strong>Spontaneous CVR deficits in the PHG are observed in older adults with MCI and memory impairment, suggesting medial temporal microvascular dysfunction is observed in cognitive decline.</p><p><strong>Highlights: </strong>Aging is associated with decline in whole brain spontaneous cerebrovascular reactivity (CVR). Older adults with mild cognitive impairment exhibit deficits in spontaneous CVR in the parahippocampal gyrus (PHG). Memory impairment is correlated with reduced spontaneous CVR in the PHG.</p>\",\"PeriodicalId\":7471,\"journal\":{\"name\":\"Alzheimer's & Dementia\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":13.0000,\"publicationDate\":\"2024-11-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Alzheimer's & Dementia\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.1002/alz.14396\",\"RegionNum\":1,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CLINICAL NEUROLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Alzheimer's & Dementia","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1002/alz.14396","RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CLINICAL NEUROLOGY","Score":null,"Total":0}
Spontaneous cerebrovascular reactivity at rest in older adults with and without mild cognitive impairment and memory deficits.
Introduction: Older adults with mild cognitive impairment (MCI) exhibit deficits in cerebrovascular reactivity (CVR), suggesting CVR is a biomarker for vascular contributions to MCI. This study examined if spontaneous CVR is associated with MCI and memory impairment.
Methods: One hundred sixty-one older adults free of dementia or major neurological/psychiatric disorders were recruited. Participants underwent clinical interviews, cognitive testing, venipuncture for Alzheimer's disease (AD) biomarkers, and brain magnetic resonance imaging. Spontaneous CVR was quantified during 5 minutes of rest. Respiratory gases analyzed through nasal cannula to quantify end-tidal carbon dioxide (ETCO2) levels were used to estimate CVR.
Results: Whole brain CVR was negatively associated with age, but not MCI. Lower CVR in the parahippocampal gyrus (PHG) was found in participants with MCI and was linked to worse memory performance on memory tests. Results remained significant after adjusting for AD biomarkers and vascular risk factors.
Discussion: Spontaneous CVR deficits in the PHG are observed in older adults with MCI and memory impairment, suggesting medial temporal microvascular dysfunction is observed in cognitive decline.
Highlights: Aging is associated with decline in whole brain spontaneous cerebrovascular reactivity (CVR). Older adults with mild cognitive impairment exhibit deficits in spontaneous CVR in the parahippocampal gyrus (PHG). Memory impairment is correlated with reduced spontaneous CVR in the PHG.
期刊介绍：
Alzheimer's & Dementia is a peer-reviewed journal that aims to bridge knowledge gaps in dementia research by covering the entire spectrum, from basic science to clinical trials to social and behavioral investigations. It provides a platform for rapid communication of new findings and ideas, optimal translation of research into practical applications, increasing knowledge across diverse disciplines for early detection, diagnosis, and intervention, and identifying promising new research directions. In July 2008, Alzheimer's & Dementia was accepted for indexing by MEDLINE, recognizing its scientific merit and contribution to Alzheimer's research.
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