Journal article
Abnormal CD161+ immune cells and retinoic acid receptor–related orphan receptor γt–mediate enhanced IL-17F expression in the setting of genetic hypertension
Journal of allergy and clinical immunology, Vol.140(3), pp.809-821.e3
09/2017
DOI: 10.1016/j.jaci.2016.11.039
PMID: 28093217
Abstract
Hypertension is considered an immunologic disorder. However, the role of the IL-17 family in genetic hypertension in the spontaneously hypertensive rat (SHR) has not been investigated.
We tested the hypothesis that enhanced TH17 programming and IL-17 expression in abundant CD161+ immune cells in SHRs represent an abnormal proinflammatory adaptive immune response. Furthermore, we propose that this response is driven by the master regulator retinoic acid receptor–related orphan receptor γt (RORγt) and a nicotinic proinflammatory innate immune response.
We measured expression of the CD161 surface marker on splenocytes in SHRs and normotensive control Wistar-Kyoto (WKY) rats from birth to adulthood. We compared expression of IL-17A and IL-17F in splenic cells under different conditions. We then determined the functional effect of these cytokines on vascular reactivity. Finally, we tested whether pharmacologic inhibition of RORγt can attenuate hypertension in SHRs.
SHRs exhibited an abnormally large population of CD161+ cells at birth that increased with age, reaching more than 30% of the splenocyte population at 38 weeks. The SHR splenocytes constitutively expressed more RORγt than those of WKY rats and produced more IL-17F on induction. Exposure of WKY rat aortas to IL-17F impaired endothelium-dependent vascular relaxation, whereas IL-17A did not. Moreover, in vivo inhibition of RORγt by digoxin decreased systolic blood pressure in SHRs.
SHRs have a markedly enhanced potential for RORγt-driven expression of proinflammatory and prohypertensive IL-17F in response to innate immune activation. Increased RORγt and IL-17F levels contribute to SHR hypertension and might be therapeutic targets.
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Details
- Title: Subtitle
- Abnormal CD161+ immune cells and retinoic acid receptor–related orphan receptor γt–mediate enhanced IL-17F expression in the setting of genetic hypertension
- Creators
- Madhu V Singh - Department of Internal Medicine and Abboud Cardiovascular Research Center, Carver College of Medicine, University of Iowa, Iowa City, IowaMichael Z Cicha - Department of Internal Medicine and Abboud Cardiovascular Research Center, Carver College of Medicine, University of Iowa, Iowa City, IowaSantosh Kumar - Department of Internal Medicine and Abboud Cardiovascular Research Center, Carver College of Medicine, University of Iowa, Iowa City, IowaDavid K Meyerholz - Department of Pathology, University of Iowa, Iowa City, IowaKaikobad Irani - Department of Internal Medicine and Abboud Cardiovascular Research Center, Carver College of Medicine, University of Iowa, Iowa City, IowaMark W Chapleau - Department of Internal Medicine and Abboud Cardiovascular Research Center, Carver College of Medicine, University of Iowa, Iowa City, IowaFrançois M Abboud - Department of Internal Medicine and Abboud Cardiovascular Research Center, Carver College of Medicine, University of Iowa, Iowa City, Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of allergy and clinical immunology, Vol.140(3), pp.809-821.e3
- Publisher
- Elsevier Inc
- DOI
- 10.1016/j.jaci.2016.11.039
- PMID
- 28093217
- ISSN
- 0091-6749
- eISSN
- 1097-6825
- Language
- English
- Date published
- 09/2017
- Academic Unit
- Molecular Physiology and Biophysics; Pathology; Cardiovascular Medicine; Radiation Oncology; Fraternal Order of Eagles Diabetes Research Center; Endocrinology and Metabolism; Internal Medicine
- Record Identifier
- 9984025305602771
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