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02 May 2018 : Animal Research  

Ouabain Attenuates Sepsis-Induced Immunosuppression in Mice by Activation and Anti-Apoptosis of T Cells

Ruibin Niu1BC, Hao Gao2DE, Yuan Zhou1EF, Jie Zhang1A*

DOI: 10.12659/MSM.906889

Med Sci Monit 2018; 24: ANS2720-2727

Abstract

BACKGROUND: Sepsis is known to trigger impaired T cell function, which relates to immunosuppression, contributing to refractory infection and high mortality. The mechanisms of T cell recovery remain to be elucidated, and novel and effective therapeutics for sepsis are needed. Ouabain, a small molecule of cardiac glycosides, can reverse immunoparalysis in many settings.

MATERIAL AND METHODS: Our study was designed to determine if ouabain can relieve sepsis by modulating T cell response and related pathways. The “two-hit” model of sepsis was applied, established by intraperitoneally LPS injection 3 days after cecal ligation puncture (CLP-LPS). Ouabain was administered to mice intravenously (0.1 mg/kg) after in vivo LPS stimulation every day for 4 days. The survival rate of mice, level of serum cytokines, percentage of activated T cells, apoptosis of T cells, and possibly related genes were assessed.

RESULTS: The results suggest that ouabain administration after establishment of the CLP-LPS model improved survival rates, elevated pro-inflammatory cytokines, and decreased anti-inflammatory cytokines in serum. More activated T cells and fewer apoptotic T cells were detected in the spleens after treatment with ouabain. Such changes might correlate with the genes of Bcl-2, PUMA, IRAK-M, and SOCS1.

CONCLUSIONS: Taken together, our data show ouabain is a T cell mediator during sepsis recovery.

Keywords: Immunosuppression, Ouabain, Sepsis

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750