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Shan D, Li S, Xu R, Nie G, Xie Y, Han J, Gao X, Zheng Y, Xu Z, Dai Z. Post-COVID-19 human memory impairment: A PRISMA-based systematic review of evidence from brain imaging studies. Front Aging Neurosci 2022; 14:1077384. [PMID: 36570532 PMCID: PMC9780393 DOI: 10.3389/fnagi.2022.1077384] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Accepted: 11/30/2022] [Indexed: 12/14/2022] Open
Abstract
Many people with coronavirus disease 2019 (COVID-19) report varying degrees of memory impairment. Neuroimaging techniques such as MRI and PET have been utilized to shed light on how COVID-19 affects brain function in humans, including memory dysfunction. In this PRISMA-based systematic review, we compared and summarized the current literature looking at the relationship between COVID-19-induced neuropathological changes by neuroimaging scans and memory symptoms experienced by patients who recovered from COVID-19. Overall, this review suggests a correlational trend between structural abnormalities (e.g., cortical atrophy and white matter hyperintensities) or functional abnormalities (e.g., hypometabolism) in a wide range of brain regions (particularly in the frontal, parietal and temporal regions) and memory impairments in COVID-19 survivors, although a causal relationship between them remains elusive in the absence of sufficient caution. Further longitudinal investigations, particularly controlled studies combined with correlational analyses, are needed to provide additional evidence.
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Affiliation(s)
- Dan Shan
- Department of Biobehavioral Sciences, Columbia University, New York, NY, United States
| | - Shaoyang Li
- Faculty of Science, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China
| | - Ruichen Xu
- Department of Integrative Biology, University of Wisconsin-Madison, Madison, WI, United States
| | - Glen Nie
- Department of Biological Science, Northeastern University, Boston, MA, United States
| | - Yangyiran Xie
- School of Medicine, Vanderbilt University, Nashville, TN, United States
| | - Junchu Han
- New York State Psychiatric Institute, Global Psychiatric Epidemiology Group, New York, NY, United States
| | - Xiaoyi Gao
- School of Medicine, Saint Louis University, St. Louis, MO, United States
| | - Yuandian Zheng
- Department of Biobehavioral Sciences, Columbia University, New York, NY, United States
| | - Zhen Xu
- Minhang Crosspoint Academy at Shanghai Wenqi Middle School, Shanghai, China
| | - Zhihao Dai
- School of Medicine, Royal College of Surgeons in Ireland, University of Medicine and Health Sciences, Dublin, Ireland
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Sarubbo F, El Haji K, Vidal-Balle A, Bargay Lleonart J. Neurological consequences of COVID-19 and brain related pathogenic mechanisms: A new challenge for neuroscience. Brain Behav Immun Health 2022; 19:100399. [PMID: 34870247 PMCID: PMC8629776 DOI: 10.1016/j.bbih.2021.100399] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 11/26/2021] [Accepted: 11/26/2021] [Indexed: 12/15/2022] Open
Abstract
Due to the infection by the SARS-CoV-2 virus (COVID-19) there were also reported neurological symptoms, being the most frequent and best cited those that affect the cerebrovascular, sensorial, cognitive and motor functions, together with the neurological diffuse symptoms as for examples headache or dizziness. Besides, some of them behave high risk of mortality. Consequently, it is crucial to elucidate the mechanisms of action in brain of SARS-CoV-2 virus in order to create new therapeutic targets to fight against this new disease. Since now the mechanisms of arrival to the brain seems to be related with the following processes: blood brain barrier (BBB) disruption together with nervous or axonal transport of the virus by the trigeminal nerve, the vagus nerve, or the brain-gut-axis. Being two the mechanisms of brain affectation most cited: a direct affectation of the virus in the brain through neuroinvasion and an indirect mechanism of action due to the effects of the systemic infection. Both processes include the triggering of inflammation, hypoxia and the increased likelihood of secondary infections. This topic supposes a major novel challenge for neuroscience. Therefore, the aim of this review is to provide summarized information about the neurological symptomatology and the brain pathogenic mechanisms involved and reported in COVID-19.
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Affiliation(s)
- Fiorella Sarubbo
- Research Unit, University Hospital Son Llàtzer, Health Research Institute of the Balearic Islands (IdISBa), Crta, Manacor Km 4, 07198, Palma, Spain
- University of the Balearic Islands (UIB), Biology Department, Mallorca, Spain
- University of the Balearic Islands (UIB), Medicine Faculty, Mallorca, Spain
| | - Khaoulah El Haji
- Research Unit, University Hospital Son Llàtzer, Health Research Institute of the Balearic Islands (IdISBa), Crta, Manacor Km 4, 07198, Palma, Spain
| | - Aina Vidal-Balle
- Research Unit, University Hospital Son Llàtzer, Health Research Institute of the Balearic Islands (IdISBa), Crta, Manacor Km 4, 07198, Palma, Spain
| | - Joan Bargay Lleonart
- Research Unit, University Hospital Son Llàtzer, Health Research Institute of the Balearic Islands (IdISBa), Crta, Manacor Km 4, 07198, Palma, Spain
- University of the Balearic Islands (UIB), Medicine Faculty, Mallorca, Spain
- Hematology Department, University Hospital Son Llàtzer, Crta, Manacor Km 4, 07198, Palma, Spain
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