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Fear conditioning modulates the intrinsic excitability of ventral hippocampal CA1 neurons in male rats.
J Neurophysiol
January 2025
Department of Psychology, University of Wisconsin-Milwaukee, Milwaukee WI, USA.
The hippocampus has a known role in learning and memory, with the ventral subregion supporting many learning tasks involving affective responding, including fear conditioning. Altered neuronal intrinsic excitability reflects experience-dependent plasticity that supports learning-related behavioral changes. Such changes have previously been observed in the dorsal hippocampus following fear conditioning, but little work has examined the effect of fear conditioning on ventral hippocampal intrinsic plasticity.
View Article and Find Full Text PDFLow-dose intranasal deferoxamine modulates memory, neuroinflammation, and the neuronal transcriptome in the streptozotocin rodent model of Alzheimer's disease.
Front Neurosci
January 2025
HealthPartners Institute, Neuroscience Research, HealthPartners Neuroscience Center, Saint Paul, MN, United States.
Introduction: Intranasal (IN) deferoxamine (DFO) has emerged over the past decade as a promising therapeutic in preclinical experiments across neurodegenerative and neurovascular diseases. As an antioxidant iron chelator, its mechanisms are multimodal, involving the binding of brain iron and the consequent engagement of several pathways to counter pathogenesis across multiple diseases. We and other research groups have shown that IN DFO rescues cognitive impairment in several rodent models of Alzheimer Disease (AD).
View Article and Find Full Text PDFScaling of ventral hippocampal activity during anxiety.
J Neurosci
January 2025
Laboratory of Systems Neuroscience, Department of Physiology, University of Bern, Bern, Switzerland.
The hippocampus supports a multiplicity of functions, with the dorsal region contributing to spatial representations and memory, and the ventral hippocampus (vH) being primarily involved in emotional processing. While spatial encoding has been extensively investigated, how the vH activity is tuned to emotional states, e.g.
View Article and Find Full Text PDFInfluence of lung function on macro- and micro-structural brain changes in mid- and late-life.
Int J Surg
January 2025
Aging Research Center, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden.
Introduction: Lung function has been associated with cognitive decline and dementia, but the extent to which lung function impacts brain structural changes remains unclear. We aimed to investigate the association of lung function with structural macro- and micro-brain changes across mid- and late-life.
Methods: The study included a total of 37 164 neurologic disorder-free participants aged 40-70 years from the UK Biobank, who underwent brain MRI scans 9 years after baseline.
Gamma oscillations are disrupted in various neurological disorders, including Alzheimer's disease (AD). In AD mouse models, non-invasive audiovisual stimulation (AuViS) at 40 Hz enhances gamma oscillations, clears amyloid-beta, and improves cognition. We investigated mechanisms of circuit remodeling underlying these restorative effects by leveraging the sensitivity of hippocampal neurogenesis to activity in middle-aged wild-type mice.
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