Neonatology · 2010
The anti-inflammatory agent N-acetyl cysteine exacerbates endotoxin-induced hypoxemia and hypotension and induces polycythemia in the ovine fetus.
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Probyn Megan E, Cock Megan L, Duncan Jhodie R, Tolcos Mary, Hale Nadia, Shields Amy, Rees Sandra M, Harding Richard
Аннотация
BACKGROUND: Lipopolysaccharide (LPS) delivered acutely to the ovine fetus induces cerebral white matter injury and brain inflammation. N-acetyl cysteine (NAC) is potentially neuroprotective as it blocks the production of inflammatory cytokines and increases glutathione levels; however, it is unknown whether NAC affects the physiological status of the fetus already exposed to an inflammatory environment.
OBJECTIVES: Our objective was to determine whether NAC influences the physiological effects of LPS exposure in the ovine fetus.
METHODS: Catheterized fetal sheep underwent one of four treatments (saline, n = 6; LPS, n = 6; LPS + NAC, n = 6; NAC, n = 3) on 5 consecutive days from 95 days of gestation (term approximately 147 days). Fetal arterial pressure and heart rate were recorded and blood samples collected.
RESULTS: LPS administration resulted in fetal hypoxemia and hypotension; simultaneous treatment with NAC exacerbated these effects and induced polycythemia. NAC treatment alone had no effect on the fetus.
CONCLUSION: In the presence of LPS, NAC compromises fetal physiological status, suggesting that it may not be a suitable antenatal treatment for a fetus with evidence of inflammation.
OBJECTIVES: Our objective was to determine whether NAC influences the physiological effects of LPS exposure in the ovine fetus.
METHODS: Catheterized fetal sheep underwent one of four treatments (saline, n = 6; LPS, n = 6; LPS + NAC, n = 6; NAC, n = 3) on 5 consecutive days from 95 days of gestation (term approximately 147 days). Fetal arterial pressure and heart rate were recorded and blood samples collected.
RESULTS: LPS administration resulted in fetal hypoxemia and hypotension; simultaneous treatment with NAC exacerbated these effects and induced polycythemia. NAC treatment alone had no effect on the fetus.
CONCLUSION: In the presence of LPS, NAC compromises fetal physiological status, suggesting that it may not be a suitable antenatal treatment for a fetus with evidence of inflammation.