1
|
Prickett TC, A Espiner E. Circulating products of C-type natriuretic peptide and links with organ function in health and disease. Peptides 2020; 132:170363. [PMID: 32634451 DOI: 10.1016/j.peptides.2020.170363] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 06/08/2020] [Accepted: 06/29/2020] [Indexed: 02/07/2023]
Abstract
Paracrine actions of CNP and rapid degradation at source severely limit study of CNP's many roles in vivo. However provided sensitive and validated assays are used, there is increasing evidence that low concentrations of bioactive CNP in plasma, and the readily detectable concentrations of the bio-inactive processed product of proCNP (aminoterminal proCNP), can be used to advance understanding of the hormone's role in pathophysiology. Provided renal function is normal, concordant changes in both CNP and NTproCNP reflect change in tissue production of proCNP whereas change in CNP alone results from altered rates of bioactive CNP degradation and are reflected in the ratio of NTproCNP to CNP. As already shown in juveniles, where plasma concentration of CNP products are higher and are associated with concurrent endochondral bone growth, measurements of plasma CNP products in mature adults have potential to clarify organ response to stress and injury. Excepting the role of CNP in fetal-maternal welfare, this review examines evidence linking plasma CNP products with function of a wide range of tissues in adults, including the impact of extraneous factors such as nutrients, hormone therapy and exercise.
Collapse
Affiliation(s)
- Timothy Cr Prickett
- Department of Medicine, University of Otago, PO Box 4345, Christchurch, 8140 New Zealand.
| | - Eric A Espiner
- Department of Medicine, University of Otago, PO Box 4345, Christchurch, 8140 New Zealand
| |
Collapse
|
2
|
Guisle I, Gratuze M, Petry S, Morin F, Keraudren R, Whittington RA, Hébert SS, Mongrain V, Planel E. Circadian and sleep/wake-dependent variations in tau phosphorylation are driven by temperature. Sleep 2019; 43:5614684. [DOI: 10.1093/sleep/zsz266] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 09/30/2019] [Indexed: 12/27/2022] Open
Abstract
AbstractStudy ObjectivesAggregates of hyperphosphorylated tau protein are a hallmark of Alzheimer’s disease (AD) and other tauopathies. Sleep disturbances are common in AD patients, and insufficient sleep may be a risk factor for AD. Recent evidence suggests that tau phosphorylation is dysregulated by sleep disturbances in mice. However, the physiological regulation of tau phosphorylation during the sleep–wake cycle is currently unknown. We thus aimed to determine whether tau phosphorylation is regulated by circadian rhythms, inherently linked to the sleep–wake cycle.MethodsTo answer these questions, we analyzed by Western blotting tau protein and associated kinases and phosphatases in the brains of awake, sleeping, and sleep-deprived B6 mice. We also recorded their temperature.ResultsWe found that tau phosphorylation undergoes sleep-driven circadian variations as it is hyperphosphorylated during sleep but not during acute sleep deprivation. Moreover, we demonstrate that the mechanism behind these changes involves temperature, as tau phosphorylation was inversely correlated with circadian- and sleep deprivation-induced variations in body temperature, and prevented by housing the animals at a warmer temperature. Notably, similar changes in tau phosphorylation were reproduced in neuronal cells exposed to temperatures recorded during the sleep–wake cycle. Our results also suggest that inhibition of protein phosphatase 2A (PP2A) may explain the hyperphosphorylation of tau during sleep-induced hypothermia.ConclusionTaken together, our results demonstrate that tau phosphorylation follows a circadian rhythm driven mostly by body temperature and sleep, and provide the physiological basis for further understanding how sleep deregulation can affect tau and ultimately AD pathology.
Collapse
Affiliation(s)
- Isabelle Guisle
- Université Laval, Faculté de Médecine, Département de Psychiatrie et Neurosciences, Québec, QC, Canada
| | - Maud Gratuze
- Université Laval, Faculté de Médecine, Département de Psychiatrie et Neurosciences, Québec, QC, Canada
| | - Séréna Petry
- Université Laval, Faculté de Médecine, Département de Psychiatrie et Neurosciences, Québec, QC, Canada
| | - Françoise Morin
- Centre de Recherche du CHU de Québec, Axe Neurosciences, Québec, QC, Canada
| | - Rémi Keraudren
- Université Laval, Faculté de Médecine, Département de Psychiatrie et Neurosciences, Québec, QC, Canada
| | - Robert A Whittington
- Department of Anesthesiology, College of Physicians and Surgeons, Columbia University, NY
| | - Sébastien S Hébert
- Université Laval, Faculté de Médecine, Département de Psychiatrie et Neurosciences, Québec, QC, Canada
- Centre de Recherche du CHU de Québec, Axe Neurosciences, Québec, QC, Canada
| | - Valérie Mongrain
- Research Center and Center for Advanced Research in Sleep Medicine, Hôpital du Sacré-Coeur de Montréal (CIUSSS-NIM), Montréal, QC, Canada
- Department of Neuroscience, Université de Montréal, Montréal, QC, Canada
| | - Emmanuel Planel
- Université Laval, Faculté de Médecine, Département de Psychiatrie et Neurosciences, Québec, QC, Canada
- Centre de Recherche du CHU de Québec, Axe Neurosciences, Québec, QC, Canada
| |
Collapse
|
3
|
Piesiewicz A, Kedzierska U, Podobas E, Adamska I, Zuzewicz K, Majewski P. Season-dependent Postembryonic Maturation of the Diurnal Rhythm of Melatonin Biosynthesis in the Chicken Pineal Gland. Chronobiol Int 2012; 29:1227-38. [DOI: 10.3109/07420528.2012.719964] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|