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Open AccessArticle

Circulating Exosomal miRNAs Signal Circadian Misalignment to Peripheral Metabolic Tissues

1
Department of Child Health, Child Health Research Institute, University of Missouri School of Medicine, Columbia, MO 65201, USA
2
Department of Biological Sciences, Center for Human Health and the Environment, North Carolina State University, Raleigh, NC 27606, USA
3
Sleep and Performance Research Center, Washington State University, Spokane, WA 99202, USA
4
Department of Physical Therapy, Eastern Washington University, Spokane, WA 99202, USA
5
Center for Research Informatics, Biological Sciences Division, Pritzker School of Medicine, The University of Chicago, Chicago, IL 60637, USA
6
Département de Pneumologie, INSERM UMR 1063 SOPAM, Centre Hospitalier Universitaire, 49100 Angers, France
7
Department of Neurology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90007, USA
8
Elson S. Floyd College of Medicine, Washington State University Health Sciences Spokane, Spokane, WA 99202, USA
*
Author to whom correspondence should be addressed.
Shared senior authorship.
Int. J. Mol. Sci. 2020, 21(17), 6396; https://doi.org/10.3390/ijms21176396
Received: 18 August 2020 / Accepted: 1 September 2020 / Published: 3 September 2020
(This article belongs to the Special Issue Genetic Markers in Sleep Disorders)
Night shift work increases risk of metabolic disorders, particularly obesity and insulin resistance. While the underlying mechanisms are unknown, evidence points to misalignment of peripheral oscillators causing metabolic disturbances. A pathway conveying such misalignment may involve exosome-based intercellular communication. Fourteen volunteers were assigned to a simulated day shift (DS) or night shift (NS) condition. After 3 days on the simulated shift schedule, blood samples were collected during a 24-h constant routine protocol. Exosomes were isolated from the plasma samples from each of the blood draws. Exosomes were added to naïve differentiated adipocytes, and insulin-induced pAkt/Akt expression changes were assessed. ChIP-Seq analyses for BMAL1 protein, mRNA microarrays and exosomal miRNA arrays combined with bioinformatics and functional effects of agomirs and antagomirs targeting miRNAs in NS and DS exosomal cargo were examined. Human adipocytes treated with exosomes from the NS condition showed altered Akt phosphorylation responses to insulin in comparison to those treated with exosomes from the DS condition. BMAL1 ChIP-Seq of exosome-treated adipocytes showed 42,037 binding sites in the DS condition and 5538 sites in the NS condition, with a large proportion of BMAL1 targets including genes encoding for metabolic regulators. A significant and restricted miRNA exosomal signature emerged after exposure to the NS condition. Among the exosomal miRNAs regulated differentially after 3 days of simulated NS versus DS, proof-of-concept validation of circadian misalignment signaling was demonstrated with hsa-mir-3614-5p. Exosomes from the NS condition markedly altered expression of key genes related to circadian rhythm in several cultured cell types, including adipocytes, myocytes, and hepatocytes, along with significant changes in 29 genes and downstream gene network interactions. Our results indicate that a simulated NS schedule leads to changes in exosomal cargo in the circulation. These changes promote reduction of insulin sensitivity of adipocytes in vitro and alter the expression of core clock genes in peripheral tissues. Circulating exosomal miRNAs may play an important role in metabolic dysfunction in NS workers by serving as messengers of circadian misalignment to peripheral tissues. View Full-Text
Keywords: Bmal1-dLuc reporter assay; circadian rhythm; clock genes; constant routine; exosomes; extracellular vesicles; hsa-mir-3614-5p; insulin resistance; night shift work; peripheral oscillators Bmal1-dLuc reporter assay; circadian rhythm; clock genes; constant routine; exosomes; extracellular vesicles; hsa-mir-3614-5p; insulin resistance; night shift work; peripheral oscillators
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MDPI and ACS Style

Khalyfa, A.; Gaddameedhi, S.; Crooks, E.; Zhang, C.; Li, Y.; Qiao, Z.; Trzepizur, W.; Kay, S.A.; Andrade, J.; Satterfield, B.C.; Hansen, D.A.; Kheirandish-Gozal, L.; Van Dongen, H.P.A.; Gozal, D. Circulating Exosomal miRNAs Signal Circadian Misalignment to Peripheral Metabolic Tissues. Int. J. Mol. Sci. 2020, 21, 6396.

AMA Style

Khalyfa A, Gaddameedhi S, Crooks E, Zhang C, Li Y, Qiao Z, Trzepizur W, Kay SA, Andrade J, Satterfield BC, Hansen DA, Kheirandish-Gozal L, Van Dongen HPA, Gozal D. Circulating Exosomal miRNAs Signal Circadian Misalignment to Peripheral Metabolic Tissues. International Journal of Molecular Sciences. 2020; 21(17):6396.

Chicago/Turabian Style

Khalyfa, Abdelnaby; Gaddameedhi, Shobhan; Crooks, Elena; Zhang, Chunling; Li, Yan; Qiao, Zhuanhong; Trzepizur, Wojciech; Kay, Steve A.; Andrade, Jorge; Satterfield, Brieann C.; Hansen, Devon A.; Kheirandish-Gozal, Leila; Van Dongen, Hans P.A.; Gozal, David. 2020. "Circulating Exosomal miRNAs Signal Circadian Misalignment to Peripheral Metabolic Tissues" Int. J. Mol. Sci. 21, no. 17: 6396.

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