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Esposito P, Dubé-Zinatelli E, Krnel R, Cappelletti L, Liang J, Ismail N. Sex-dependent effects of antimicrobials and lipopolysaccharide on blood-brain-barrier permeability in pubertal male and female CD1 mice. Horm Behav 2024; 165:105615. [PMID: 39154391 DOI: 10.1016/j.yhbeh.2024.105615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2024] [Revised: 07/16/2024] [Accepted: 08/07/2024] [Indexed: 08/20/2024]
Abstract
Exposure to stressors during puberty can disrupt normal development and possibly increase susceptibility to neurodegenerative disorders later in life. However, the mechanisms underlying the relationship between pubertal stress exposure and neurodegeneration remain unclear. As such, the current study was designed to examine the effects of pubertal antimicrobial (AMNS) and lipopolysaccharide (LPS) treatments on intestinal and blood-brain-barrier (BBB) permeability in male and female mice. Moreover, we also examined the sex-specific effects of pubertal AMNS and LPS treatments on gross motor activity, heart rate, and core body temperature. At four weeks of age, male and female CD1 mice were implanted with the G2 HR E-Mitter telemetry system. At five weeks of age, mice received 200 μL of broad-spectrum antimicrobial or water, through oral gavage, twice daily for seven days. Mice received an intraperitoneal injection of either saline or LPS at six weeks of age. BBB and intestinal permeability were examined 24 h, 72 h, and one week post-LPS/saline treatment. Telemetric data was collected for 48 h post-LPS/saline treatment. The results showed that pubertal AMNS and LPS treatments increased sickness behaviours and decreased body temperature and heart rate, in a sex-dependent manner. Furthermore, pubertal AMNS and LPS treatments resulted in sex-dependent regional increases in BBB permeability 24 h and 72 h post-LPS/saline treatment, while global increases in BBB permeability were only observed one week post-LPS/saline treatment. These results further our understanding of the combined effects of AMNS and LPS treatments on physiology and on the enduring negative changes observed following pubertal exposure to stressors.
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Affiliation(s)
- Pasquale Esposito
- NISE Laboratory, School of Psychology, Faculty of Social Sciences, University of Ottawa, Ontario K1N 6N5, Canada
| | - Eleni Dubé-Zinatelli
- NISE Laboratory, School of Psychology, Faculty of Social Sciences, University of Ottawa, Ontario K1N 6N5, Canada
| | - Rebecca Krnel
- NISE Laboratory, School of Psychology, Faculty of Social Sciences, University of Ottawa, Ontario K1N 6N5, Canada
| | - Luna Cappelletti
- NISE Laboratory, School of Psychology, Faculty of Social Sciences, University of Ottawa, Ontario K1N 6N5, Canada
| | - Jacky Liang
- NISE Laboratory, School of Psychology, Faculty of Social Sciences, University of Ottawa, Ontario K1N 6N5, Canada
| | - Nafissa Ismail
- NISE Laboratory, School of Psychology, Faculty of Social Sciences, University of Ottawa, Ontario K1N 6N5, Canada; Brain and Mind Research Institute, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada; LIFE Research Institute, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada.
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Bolton CJ, Khan OA, Moore EE, Pechman KR, Taylor Davis L, Liu D, Landman BA, Gifford KA, Hohman TJ, Jefferson AL. Baseline grey matter volumes and white matter hyperintensities predict decline in functional activities in older adults over a 5-year follow-up period. Neuroimage Clin 2023; 38:103393. [PMID: 37003129 PMCID: PMC10102557 DOI: 10.1016/j.nicl.2023.103393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 02/27/2023] [Accepted: 03/26/2023] [Indexed: 03/31/2023]
Abstract
INTRODUCTION Functional independence is an essential predictor of quality of life in aging, yet few accessible predictors of functional decline have been identified. This study examined associations between baseline structural neuroimaging markers and longitudinal functional status. METHODS Linear mixed effects models with follow-up time interaction terms related baseline grey matter volume and white matter hyperintensities (WMHs) to functional trajectory, adjusting for demographic and medical covariates. Subsequent models assessed interactions with cognitive status and apolipoprotein E (APOE) ε4 status. RESULTS Smaller baseline grey matter volumes, particularly in regions commonly affected by Alzheimer's disease (AD), and greater baseline WMHs were associated with faster functional decline over a mean 5-year follow-up. Effects were stronger in APOE-ε4 carriers on grey matter variables. Cognitive status interacted with most MRI variables. DISCUSSION Greater atrophy in AD-related regions and higher WMH burden at study entry were associated with faster functional decline, particularly among participants at increased risk of AD.
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Affiliation(s)
- Corey J Bolton
- Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Omair A Khan
- Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Elizabeth E Moore
- Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Kimberly R Pechman
- Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - L Taylor Davis
- Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Dandan Liu
- Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Bennett A Landman
- Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, TN, USA
| | - Katherine A Gifford
- Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Timothy J Hohman
- Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Angela L Jefferson
- Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA.
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Moore EE, Jefferson AL. Impact of Cardiovascular Hemodynamics on Cognitive Aging. Arterioscler Thromb Vasc Biol 2021; 41:1255-1264. [PMID: 33567862 DOI: 10.1161/atvbaha.120.311909] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- Elizabeth E Moore
- Vanderbilt Memory & Alzheimer's Center (E.E.M., A.L.J.), Vanderbilt University Medical Center, Nashville, TN.,Medical Scientist Training Program, School of Medicine, Vanderbilt University, Nashville, TN (E.E.M.)
| | - Angela L Jefferson
- Vanderbilt Memory & Alzheimer's Center (E.E.M., A.L.J.), Vanderbilt University Medical Center, Nashville, TN.,Department of Neurology (A.L.J.), Vanderbilt University Medical Center, Nashville, TN
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