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Nicotinic acetylcholine receptor alpha 7 stimulation dampens splenic myelopoiesis and inhibits atherogenesis in Apoe -/- mice.
Atherosclerosis 2017 October
BACKGROUND AND AIMS: Monocyte levels predict cardiovascular outcomes and play a causal role in atherogenesis. Monocytes can be produced in the spleen and track to the atherosclerotic lesion in significant numbers. The cholinergic system has been shown to have anti-inflammatory actions in the spleen. We aimed to explore whether therapeutic stimulation of the nicotinic acetylcholine receptor alpha 7 (nAChRα7) can suppress atherogenesis.
METHODS: Apoe-/- mice were placed on a Western-type diet and treated with bi-daily injections of the nAChRα7 agonist GTS-21 or vehicle every 2-3 days for 8 weeks.
RESULTS: GTS-21 caused a reduction in atherosclerosis in the aortic arch and proximal aorta. This also resulted in less plaque macrophages. Moreover, GTS-21 reduced the abundance of blood monocytes, which was caused by inhibition of inflammatory cytokines and extramedullary hematopoiesis in the spleen, along with splenic monocytes.
CONCLUSIONS: Stimulation of nAChRα7 with GTS-21 reduced atherosclerosis, which was associated with dampened splenic myelopoiesis.
METHODS: Apoe-/- mice were placed on a Western-type diet and treated with bi-daily injections of the nAChRα7 agonist GTS-21 or vehicle every 2-3 days for 8 weeks.
RESULTS: GTS-21 caused a reduction in atherosclerosis in the aortic arch and proximal aorta. This also resulted in less plaque macrophages. Moreover, GTS-21 reduced the abundance of blood monocytes, which was caused by inhibition of inflammatory cytokines and extramedullary hematopoiesis in the spleen, along with splenic monocytes.
CONCLUSIONS: Stimulation of nAChRα7 with GTS-21 reduced atherosclerosis, which was associated with dampened splenic myelopoiesis.
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