Abstract
The characteristic endogenous circadian rhythm of plasma glucocorticoid concentrations is made up from an underlying ultradian pulsatile secretory pattern. Recent evidence has indicated that this ultradian cortisol pulsatility is crucial for normal emotional response in man. In this study, we investigate the anatomical transcriptional and cell type signature of brain regions sensitive to a loss of ultradian rhythmicity in the context of emotional processing. We combine human cell type and transcriptomic atlas data of high spatial resolution with functional magnetic resonance imaging (fMRI) data. We show that the loss of cortisol ultradian rhythm alters emotional processing response in cortical brain areas that are characterized by transcriptional and cellular profiles of GABAergic function. We find that two previously identified key components of rapid non-genomic GC signaling - the ANXA1 gene and retrograde endocannabinoid signaling - show most significant differential expression (q = 3.99e-10) and enrichment (fold enrichment = 5.56, q = 9.09e-4). Our results further indicate that specific cell types, including a specific NPY-expressing GABAergic neuronal cell type, and specific G protein signaling cascades underly the cerebral effects of a loss of ultradian cortisol rhythm. Our results provide a biological mechanistic underpinning of our fMRI findings, indicating specific cell types and cascades as a target for manipulation in future experimental studies.
Original language | English |
---|---|
Article number | 100514 |
Journal | Neurobiology of Stress |
Volume | 22 |
Early online date | 4 Jan 2023 |
DOIs | |
Publication status | Published - 22 Jan 2023 |
Bibliographical note
Funding Information:Philippe Habets would like to express his gratitude to Aurina Arnatkevičiūtė for her support and guidance in the field of fMRI transcriptomics, the availability of the MATLAB pipeline for AHBA data, and to the highly insightful and useful work on combining AHBA and imaging data she and others of the Fornito lab have published. Konstantinos Kalafatakis would like to express his gratitude to Bodossaki Foundation (https://www.bodossaki.gr/en/) for supporting the research on modelling biomedical data, especially related to glucocorticoid biorhythmicity. The fMRI data was obtained from studies funded by the Medical Research Council and the Wellcome Trust to Stafford Lightman.
Funding Information:
Philippe Habets would like to express his gratitude to Aurina Arnatkevičiūtė for her support and guidance in the field of fMRI transcriptomics, the availability of the MATLAB pipeline for AHBA data, and to the highly insightful and useful work on combining AHBA and imaging data she and others of the Fornito lab have published. Konstantinos Kalafatakis would like to express his gratitude to Bodossaki Foundation ( https://www.bodossaki.gr/en/ ) for supporting the research on modelling biomedical data, especially related to glucocorticoid biorhythmicity. The fMRI data was obtained from studies funded by the Medical Research Council and the Wellcome Trust to Stafford Lightman.
Publisher Copyright:
© 2023 The Authors