Sex differences in the association of photoperiod with hippocampal subfield volumes in older adults: A cross-sectional study in the UK Biobank cohort.

Autor: Majrashi NA; Aberdeen Biomedical Imaging Centre, University of Aberdeen, Aberdeen, UK.; Diagnostic Radiology Department, College of Applied Medical Sciences, Jazan University, Jazan, Saudi Arabia., Ahearn TS; Aberdeen Biomedical Imaging Centre, University of Aberdeen, Aberdeen, UK., Williams JHG; Aberdeen Biomedical Imaging Centre, University of Aberdeen, Aberdeen, UK.; Institute of Medical Sciences, University of Aberdeen, Aberdeen, UK., Waiter GD; Aberdeen Biomedical Imaging Centre, University of Aberdeen, Aberdeen, UK.
Jazyk: angličtina
Zdroj: Brain and behavior [Brain Behav] 2020 Jun; Vol. 10 (6), pp. e01593. Date of Electronic Publication: 2020 Apr 28.
DOI: 10.1002/brb3.1593
Abstrakt: Introduction: Even though seasonal and sex-dependent changes in hippocampal and subfield volumes are well known in animals, little is known about changes in humans. We hypothesized that changes in photoperiod would predict changes in hippocampal subfield volumes and that this association would be different between females and males.
Methods: A total of 10,033 participants ranging in age from 45 to 79 years were scanned by MRI in a single location as part of the UK Biobank project. Hippocampal subfield volumes were obtained using automated processing and segmentation algorithms using the developmental version of the FreeSurfer v 6.0. Photoperiod was defined as the number of hours between sunrise and sunset on the day of scan.
Results: Photoperiod correlated positively with total hippocampal volume and all subfield volumes across participants as well as in each sex individually, with females showing greater seasonal variation in a majority of left subfield volumes compared with males. ANCOVAs revealed significant differences in rate of change in only left subiculum, CA-4, and GC-ML-DG between females and males. PLS showed highest loadings of hippocampal subfields in both females and males in GC-ML-DG, CA1, CA4, subiculum, and CA3 for left hemisphere and CA1, GC-ML-DG, CA4; subiculum and CA3 for right hemisphere in females; GC-ML-DG, CA1, subiculum, CA4 and CA3 for left hemisphere; CA1, GC-ML-DG, subiculum, CA4 and CA3 for right hemisphere in males.
Conclusion: The influence of day length on hippocampal volume has implications for modeling age-related decline in memory in older adults, and sex differences suggest an important role for hormones in these effects.
(© 2020 The Authors. Brain and Behavior published by Wiley Periodicals, Inc.)
Databáze: MEDLINE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje