DP1 Activation Reverses Age-Related Hypertension Via NEDD4L-Mediated T-Bet Degradation in T Cells

Article

关键词: PROSTAGLANDIN D-2;    INTERFERON-GAMMA;    TRANSCRIPTION FACTOR;    SEX-DIFFERENCES;    IFN-GAMMA;    RECEPTOR;    MODULATION;    NIACIN;    PGD(2);    ALPHA;   

DOI  :  10.1161/CIRCULATIONAHA.119.042532

来源: SCIE

【 摘 要 】

Background: Blood pressure often rises with aging, but exact mechanisms are still not completely understood. With aging, the level of proinflammatory cytokines increases in T lymphocytes. Prostaglandin D-2, a proresolution mediator, suppresses Type 1 T helper (Th1) cytokines through D-prostanoid receptor 1 (DP1). In this study, we aimed to investigate the role of the prostaglandin D-2/DP1 axis in T cells on age-related hypertension. Methods: To clarify the physiological and pathophysiological roles of DP1 in T cells with aging, peripheral blood samples were collected from young and older male participants, and CD4(+) T cells were sorted for gene expression, prostaglandin production, and Western blot assays. Mice blood pressure was quantified by invasive telemetric monitor. Results: The prostaglandin D-2/DP1 axis was downregulated in CD4(+) T cells from older humans and aged mice. DP1 deletion in CD4(+) T cells augmented age-related hypertension in aged male mice by enhancing Th1 cytokine secretion, vascular remodeling, CD4(+) T cells infiltration, and superoxide production in vasculature and kidneys. Conversely, forced expression of exogenous DP1 in T cells retarded age-associated hypertension in mice by reducing Th1 cytokine secretion. Tumor necrosis factor alpha neutralization or interferon gamma deletion ameliorated the age-related hypertension in DP1 deletion in CD4(+) T cells mice. Mechanistically, DP1 inhibited Th1 activity via the PKA (protein kinase A)/p-Sp1 (phosphorylated specificity protein 1)/neural precursor cell expressed developmentally downregulated 4-like (NEDD4L) pathway-mediated T-box-expressed-in-T-cells (T-bet) ubiquitination. T-bet deletion or forced NEDD4L expression in CD4(+) T cells attenuated age-related hypertension in CD4(+) T cell-specific DP1-deficient mice. DP1 receptor activation by BW245C prevented age-associated blood pressure elevation and reduced vascular/renal superoxide production in male mice. Conclusions: The prostaglandin D-2/DP1 axis suppresses age-related Th1 activation and subsequent hypertensive response in male mice through increase of NEDD4L-mediated T-bet degradation by ubiquitination. Therefore, the T cell DP1 receptor may be an attractive therapeutic target for age-related hypertension.

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