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- W2336450853 abstract "AIM: To investigate the therapeutic effects and related mechanisms of two new cannabis preparations,O-1602 and cannabidiol(CBD),on lipopolysaccharide(LPS)-induced rodent models of intestinal motility disorder in vivo and in vitro.METHODS: The animal model of intestinal motility disorder was induced by intraperitoneal injection of LPS in mice.The gastrointestinal transit was measured by gavaging charcoal marker.Western blotting was applied to evaluate the protein expression of G-protein-coupled receptor 55(GPR55).Meanwhile,the levels of tumor necrosis factor α(TNF-α) and interleukin 6(IL-6) were tested by ELISA to assess the inflammatory degree.Smooth muscle strips from the rat and mouse ileum were incubated with LPS in vitro to establish motility disorder,and both the spontaneous contraction and electrically-evoked contraction were recorded using the organ bath technique.The traditional intracellular microelectrode technique was used to record the changes of membrane potential of smooth muscle cells.The method of determining phosphorus content was applied to assay the Ca2+-ATPase activity in smooth muscle tissues.RESULTS: In vivo,LPS resulted in significant inflammation and the disorder of gut movement(P0.01).Pretreatment with CBD decreased both the level of IL-6(P0.01) and the expression of GPR55(P0.01),and further improved the motility of gut movement(P0.05).O-1602 and CBD selectively normalized LPS-induced spontaneous and electrically-evoked contraction disorder of intestinal smooth muscle strips of rats and mice in vitro(P0.05 or P0.01),but they had no effect on the membrane potential of the smooth muscle cells both in normal and pathophysiological states.CBD also decreased the elevated Ca2+-ATPase activity in smooth muscle tissues induced by LPS(P0.05).CONCLUSION: In vivo,CBD shows protective effect on LPS-induced intestinal motility disorder by reducing inflammation and down-regulating GPR55 expression.O-1602 and CBD counterbalance LPS-induced intestinal motility disorder to some extent in vitro,and the possible mechanism may be involved in regulating the Ca2+-ATPase activity of smooth muscle tissues,but not including the change of membrane potential." @default.
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- W2336450853 date "2012-01-01" @default.
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- W2336450853 title "Effects of new cannabis preparations O-1602 and cannabidiol on LPS-induced intestinal motility disorder in rodents" @default.
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