We are witnessing a stark increase in scientific interest in the neurobiological processes associated with pregnancy and maternity. Convergent evidence suggests that around the time of labour, first-time mothers experience a specific pattern of neuroanatomical changes that are associated with maternal behaviour. Here we provide an overview of the human neurobiological adaptations of motherhood, focusing on the interplay between pregnancy-related steroid and peptide hormones, and neuroplasticity in the brain. We discuss which brain plasticity mechanisms might underlie the structural changes detected by MRI, which hormonal systems are likely to contribute to such neuroanatomical changes and how these brain mechanisms may be linked to maternal behaviour. This Review offers an overarching framework that can serve as a roadmap for future investigations.
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http://dx.doi.org/10.1038/s41583-023-00733-6 | DOI Listing |
Alzheimers Dement
December 2024
University of Rochester Medical Center, Rochester, NY, USA.
Emotional well-being (EWB) is considered to play an important role in the health of individuals over their lifespan. Clinical studies suggest an association between EWB and the risk or progression of AD. However, the mechanistic link and causal relationship between EWB and AD remain unknown, due to limited experimental access and control of the underlying brain processes in human.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Byrd Alzheimer's Center & Research Institute, Tampa, FL, USA.
Background: BIN1, the second strongest GWAS risk factor for late-onset Alzheimer's disease (AD), encodes a nucleocytoplasmic adaptor protein that plays many roles in multiple tissue and cell types. It is known that BIN1 can directly bind to tau in vitro, and neuronal BIN1 expression decreases in patients with AD. Accumulation of intracellular hyperphosphorylated tau is a hallmark pathogenic feature of AD and related tauopathies.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Massachusetts General Hospital, Boston, MA, USA.
Background: "SuperAgers" (SA) are older adults who perform significantly better than their peers and comparable to young adults on objective memory measures. Longitudinal studies show that many do not maintain their SA status over time. The fluctuation in SA stability may reflect changes in executive functioning, hypothesized to contribute to variance of episodic memory scores in SA.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Dementia Research Centre, UCL Queen Square Institute of Neurology, London, United Kingdom.
Background: Accelerated long-term forgetting (ALF) is a form of episodic memory impairment where information is retained normally over 30-60 minutes but lost at an accelerated rate over subsequent days to weeks, and is a very early - perhaps the earliest - cognitive change in both autosomal dominant and sporadic Alzheimer's disease (AD). However, the neuroanatomical changes underlying ALF in AD have remained elusive. We explored associations between ALF and focal cortical thickness in presymptomatic autosomal dominant AD (ADAD).
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Department of Pathology, Molecular, and Cell-Based Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA.
Introduction: Alzheimer's disease (AD), primary age-related tauopathy (PART), and chronic traumatic encephalopathy (CTE) all feature hyperphosphorylated tau (p-tau)-immunoreactive neurofibrillary degeneration, but differ in neuroanatomical distribution and progression of neurofibrillary degeneration and amyloid beta (Aβ) deposition.
Methods: We used Nanostring GeoMx Digital Spatial Profiling to compare the expression of 70 proteins in neurofibrillary tangle (NFT)-bearing and non-NFT-bearing neurons in hippocampal CA1, CA2, and CA4 subregions and entorhinal cortex of cases with autopsy-confirmed AD (n = 8), PART (n = 7), and CTE (n = 5).
Results: There were numerous subregion-specific differences related to Aβ processing, autophagy/proteostasis, inflammation, gliosis, oxidative stress, neuronal/synaptic integrity, and p-tau epitopes among these different disorders.
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