Airways therapy of obstructive sleep apnea dramatically improves aberrant levels of soluble cytokines involved in autoimmune disease (original) (raw)

Section snippets

Protein abbreviations

APRIL, TNFSF13, Tumor Necrosis Factor Superfamily Member 13. BAFF, TNFSF13B, B-Cell Activating Factor. CD30, TNFRSF8, CD30L, Tumor Necrosis Factor Receptor Superfamily Member 8. CD163 CD163. Chitinase 3-like 1 CHI3L1. CXCR5 CXCR5. CXCL13, CXCL13. HIF1A, HIF1A, Hypoxia Inducible Factor 1 alpha. IL-2, IL2, IL2, T Cell Growth Factor Interleukin 2**.** IFN-Alpha-2, IFNA2, Interferon Alpha 2. Endothelin 1, EDN1, Preproendothelin-1. IFN-Gamma, IFNG. IL-6, IL6, Interleukin 6, B-Cell Stimulatory Factor.

Patient data

Nineteen OSA patients had formerly been diagnosed using polysomnography (PSG) based on their Apnea Hypopnea Index (AHI > 5), but were currently receiving nightly airways therapy and were designated airways treated OSA patients. Eighteen of these recorded using CPAP, while patient #31 reported using a dental airways device [8]. There were 19 OSA patients currently with apnea, but not receiving airways therapy. Also 8 Control individuals were recruited, but among these, patient #9 was borderline

Patients

Cytokine levels were examined in the serum of nineteen OSA patients receiving airways therapy (airways treated patients, Table 1) and compared to nineteen OSA patients not receiving airways therapy and a group of volunteers without OSA (control individuals). Table 1 summarizes important biometric, sleep and laboratory data for the three groups of subjects with details presented in Supplemental Data Files SD1.

Assaying changes in serum cytokine levels

We found the levels of four cytokines with previously reported rolls in autoimmunity

Discussion

Sleep apnea is highly associated with increased risk of various autoimmune diseases. Three cytokines, TNF-Alpha, IL-17, and IL-6, that are positively associated with autoimmune disorders are often elevated in OSA patients and decreased in response to airways therapy. Herein, and fitting this pattern, we find the levels of APRIL were relatively high in apneic patients, but were significantly reduced by airways therapy. Airways therapy did not reduce APRIL all the way to the very low levels

Conclusions

The low levels of CD30, IL-2 and IFN-Alpha-2 we observed in OSA patients contrasted with expectations of increase in their expression based on previous direct or indirect evidence linking their elevated expression with acute hypoxia. APRIL levels were higher in OSA patients than in airways treated OSA patients, but the link between APRIL expression and hypoxia experienced by OSA has not been suggested in previous literature. Perhaps the chronic intermittent hypoxia experienced for months and

Compliance with ethical standards

Yes.

Funding

This project, RBM, SA, and BGP were supported by the National Center for Advancing Translational Sciences of the National Institutes of Health under Award Number UL1TR002378 and the University of Georgia's Clinical and Translational Research Unit. YW, HC, and PM were supported by NSF grants DMS 1925066, NSF grants DMS 1903226, and NIH grants R01 GM122080. The content of this article is solely the responsibility of the authors and does not necessarily represent the official views of the National

Author contributions

YW managed the data sets in Excel and prepared all the figures in R in collaboration with RBM and PM. RBM focused the project on cytokines involved in autoimmunity, managed the technical aspects of the project, and wrote the manuscript with input from the team. SA prepared all the serum samples and ran the BioPlex assays. PM directed YW in the statistical analysis of the data. BGP conceived of and initiated the study of OSA and airways treated OSA patients, defined the patient recruitment

Yes.

Declaration of Competing Interest

The authors have no financial or ethical conflicts of interest that might influence the publication of this work.

Acknowledgements

The authors would like to thank David Hall of the University of Georgia and Nick Pervolarakis of UC Irvine for their help with the statistical data and Julie Nelson for her help running the BioPlex Instrument at UGA's Cytometry Shared Resource Laboratory and MaryAnne DellaFera for her careful reading of an early draft of the manuscript.

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2024, Sleep Medicine Reviews
If the risks of these disorders are high, closer examination by a sleep specialist/physician must be undertaken and treatments considered if a firm diagnosis is established. We underline that in the case of OSA, a recent study found that airway therapy for obstructive sleep apnea was effective in decreasing levels of several cytokines involved in JIA (TNF-α, IL-6, IL-17), drawing interest in sleep disorder treatments as a key step toward the management of JIA [72]. However, in children with JIA, effects of OSA treatments, with continuous positive airway pressure (CPAP) or adenoidectomy and tonsillectomy, on underlying inflammatory pathogenesis are scarce.

2023, Cell Reports Methods
More broadly, t-SNE and UMAP use can be implemented in cases where the cell is not the individual unit. For example, using people as the individual unit, high-dimensional data such as immune response,24 genomic variation,25 or microbiome composition26 can drive the algorithm. The cross entropy test would then allow statistical comparison of disparate groups (e.g., based on disease state) to identify differences in the underlying data.

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