Diverse effects of taurine on vascular response and inflammation in GSH depletion model in rabbits

作者：Ozsarlak Sozer G; Sevin G; Ozgur H H; Yetik Anacak G; Kerry Z

来源：European Review for Medical and Pharmacological Sciences, 2016, 20(7): 1360-1372.

• Buthionine sulfoximine
• Atherosclerosis
• Taurine
• Inflammation
• Rabbit

OBJECTIVE: A reduction in GSH and an increase in free radicals are observed in inflammatory diseases, indicating oxidative stress. Taurine protects cells from the cytotoxic effects of inflammation. There have been limited studies to date evaluating the effect of taurine in oxidative stress-induced vascular dysfunction and its role in vascular inflammatory diseases. Therefore, we aimed to investigate the effect of taurine on the regulation of vascular tonus and vascular inflammatory markers in rabbit aortae and carotid arteries in oxidative stress-induced by GSH depletion.
MATERIALS AND METHODS: Rabbits were treated subcutaneously with buthionine sulfoximine (BSO), GSH-depleting compound and/or taurine. Cumulative concentration-response curves for acetylcholine (ACh), phenylephrine and 5-hydroxytriptamine (5-HT) were constructed with or without N-omega-nitro-L-arginine (LNA) in the carotid artery and aorta rings. Immunohistochemical staining was performed for TNF-alpha and IL-1 beta.
RESULTS: BSO increased ACh-induced NOdependent relaxations, phenylephrine-induced contractions in the carotid artery and 5-HT induced-contractions in both the carotid artery and the aorta. BSO decreased EDHF dependent relaxations only in the aorta. ACh-induced NO-dependent relaxations and augmented contractions were normalized by taurine. BSO increased TNF-alpha expressions in both carotid arteries and aortas, which were reversed by taurine. The BSO-induced increase in IL-1 beta was reversed by taurine only in aortae.
CONCLUSIONS: Treatment with BSO resulted in vascular reactivity changes and increased immunostaining of TNF-alpha in mainly carotid arteries in this model of oxidative stress. The effect of taurine on BSO-induced vascular reactivity changes varied depending on the vessel. The inhibition of the increase in TNF-alpha expression by taurine in both carotid arteries and aortae supports the proposal that taurine has a beneficial effect in the treatment of inflammatory diseases such as atherosclerosis.

• 出版日期2016-4