Background: Differential susceptibility model hypothesizes that a genotype need not be unfavorable all the time as postulated in stress-diathesis model but can be beneficial in a supportive context. Single-nucleotide polymorphism (SNP) (rs18000795) within the promoter region of interleukin-6 (IL-6) gene was earlier noted to have a differential susceptibility on hippocampal volume in schizophrenia (SCZ).
Materials And Methods: We examined antipsychotic-naïve/free SCZ patients ( = 35) in comparison with healthy controls ( = 68). Hippocampus volumes were assessed in 3 Tesla magnetic resonance imaging using voxel-based morphometry. Region of interest analysis was done using hippocampus mask. IL-6 SNP (rs1800795) was genotyped using TaqMan allelic discrimination assay.
Results: A significantly deficient right ( = 3.03; = 392; = 0.04) and left ( = 3.03; = 47; = 0.03) hippocampal gray matter volumes were noted in SCZ patients after controlling for the potential confounding effects of age, sex, and total brain volume. There was a significant diagnosis x rs1800795 genotype interaction involving both left ( = 2.17, = 95, = 0.02) and right ( = 1.82, = 29, = 0.04) hippocampal volumes. Patients with GG (left: =5.78; = 0.02; right: =6.21; = 0.01) but not GC/CC genotype (left: =0.89; = 0.34; right: <0.01; = 0.95) had volume depletion.
Conclusion: A paradoxical smaller hippocampal volume with GG genotype was noted in SCZ. Further elucidation of its mechanistic basis might have translational implications.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6964441 | PMC |
| http://dx.doi.org/10.4103/psychiatry.IndianJPsychiatry_486_19 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Trauma and the default mode network: review and exploratory study.
Front Behav Neurosci
December 2024
Center for Neuropsychology and Consciousness, Miami, FL, United States.
While PTSD continues to be researched in great depth, less attention has been given to the continuum of traumatic responses that resides outside this diagnosis. This investigation begins with a literature review examining the spectrum of responses through the lens of the default mode network (DMN). To build upon this literature, a systematic exploratory study was incorporated, examining DMN-related neuropsychological functioning of 27 participants (16 trauma-exposed, and 11 non-trauma-exposed), with a subset (15 participants) completing neuroimaging.
View Article and Find Full Text PDFDepressive symptoms in older adults are associated with changes in stress-related markers, functional connectivity and brain volume.
Alzheimers Res Ther
January 2025
Normandie Univ, UNICAEN, INSERM, U1237, PhIND "Physiopathology and Imaging of Neurological Disorders", NeuroPresage Team, Institut Blood and Brain @ Caen-Normandie, GIP Cyceron, Bd Henri Becquerel, BP 5229, Caen, 14074, France.
Background: Subclinical depressive symptoms increase the risk of developing Alzheimer's disease (AD). The neurobiological mechanisms underlying this link may involve stress system dysfunction, notably related to the hippocampus which is particularly sensitive to AD. We aimed to investigate the links between blood stress markers and changes in brain regions involved in the stress response in older adults with or without subclinical depressive symptoms.
View Article and Find Full Text PDFHippocampal protection during preventive cranial irradiation and neurocognitive functions in patients with small cell lung cancer.
Rep Pract Oncol Radiother
December 2024
Department of Radiotherapy, Chair of Oncology, Medical University, Lodz, Poland.
Background: In small cell lung cancer (SCLC), limiting the radiation dose in the hippocampus area during preventive cranial irradiation (PCI) can reduce nerve injury and cognitive decline. This study was done to compare changes in cognitive functions between hippocampal-protected (3D-H) and non-hippocampal-protected (3D) patients during PCI.
Materials And Methods: the study group included 113 patients with SCLC qualified to PCI divided in two subgroups: 3D-H (n = 74) and 3D (n = 39).
Cardiorespiratory fitness, hippocampal subfield morphology, and episodic memory in older adults.
Front Aging Neurosci
December 2024
Department of Psychology, University of Pittsburgh, Pittsburgh, PA, United States.
Objective: Age-related hippocampal atrophy is associated with memory loss in older adults, and certain hippocampal subfields are more vulnerable to age-related atrophy than others. Cardiorespiratory fitness (CRF) may be an important protective factor for preserving hippocampal volume, but little is known about how CRF relates to the volume of specific hippocampal subfields, and whether associations between CRF and hippocampal subfield volumes are related to episodic memory performance. To address these gaps, the current study evaluates the associations among baseline CRF, hippocampal subfield volumes, and episodic memory performance in cognitively unimpaired older adults from the Investigating Gains in Neurocognition Trial of Exercise (IGNITE) (NCT02875301).
View Article and Find Full Text PDFIntroduction: Hippocampal hyperactivity is a hallmark of prodromal Alzheimer's disease (AD) that predicts progression in patients with amnestic mild cognitive impairment (aMCI). AGB101 is an extended-release formulation of levetiracetam in the dose range previously demonstrated to normalize hippocampal activity and improve cognitive performance in aMCI. The HOPE4MCI study was a 78-week trial to assess the progression of MCI due to AD.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!