ArticleBrain communications2026
EEG-motor correlation as early Alzheimer's disease index in herpes simplex virus type-1-infected mice.
Article in Brain communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Alzheimer's disease is a neurodegenerative disorder characterized by cognitive decline and memory impairment. Early treatment requires reliable tests to identify the initial manifestations for developing treatments that modify disease progression. Neuroinflammation has been implicated as a key driver of the onset and progression of Alzheimer's disease. Herpes simplex virus type-1 (HSV-1), a neurotropic virus that establishes latency within the central nervous system, has been associated with increased proinflammatory cytokines, cognitive impairment and Alzheimer's disease-like pathology in human and rodent brains. This study employed a murine model showing an Alzheimer's disease-related phenotype, induced by HSV-1 infection and recurrent reactivation through thermal stress, to investigate previously unexplored motor function impairments and their correlation with EEG changes predictive of Alzheimer's disease-like pathology. Mice were subjected to two (2×TS) or seven thermal stress (7×TS) HSV-1 reactivations to reproduce mild and severe cognitive impairments, respectively, and were tested for recognition memory using the Novel Object Recognition test and for spatial memory using the Y-maze test. Motor performance was assessed using grip strength and grid walking tests. Local field potential recordings, immunohistochemical, morphological and molecular analyses were performed to characterize the effects of HSV-1 on neural circuits. 2×TS HSV-1 mice showed a reduced preference index in Novel Object Recognition compared to mice receiving mock infection (i.e. vehicle inoculum), whereas 7×TS HSV-1 mice displayed severe cognitive decline across the different memory domains. Motor function was preserved after the second thermal stress but was impaired after the seventh thermal stress, with reduced forelimb force and increased foot faults starting from the fourth reactivation. Following the seventh reactivation, HSV-1 mice showed astrogliosis and phosphorylated Tau accumulation.
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