Journal
AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY
Volume 203, Issue 2, Pages -Publisher
MOSBY-ELSEVIER
DOI: 10.1016/j.ajog.2010.04.033
Keywords
innate immune response; lipopolysaccharide; neonate
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Funding
- Legacy Heritage Clinical Research Initiative of the Israel Science Foundation [1814/07]
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OBJECTIVE: Because the fetal innate immune system is responsive, while still maturing during the preterm period, we hypothesized that the early activation of fetal inflammatory pathways may have an impact on the ultimate expression of immune competency. STUDY DESIGN: Pregnant Sprague Dawley rats (n = 7; Harlan Sprague Dawley Inc, Jerusalem, Israel) at 18 days gestation received intraperitoneal injections of saline solution or lipopolysaccharides (9500 mu g/kg). Pups were delivered spontaneously. At postnatal day 24, pups received intraperitoneal lipopolysaccharide (100 mu g/kg), and plasma cytokine levels were measured before and 4 hours after lipopolysaccharide administration. RESULTS: In response to lipopolysaccharides, pups of the lipopolysaccharide-injected dams had significantly (P < .05) reduced interleukin-6 (median [25th, 75th percentile], 229 [84,6086] vs 4745 [2765,6643] pg/mL), interleukin-1 beta (median [25th, 75th percentile], 820 [125,1196] vs 1682 [1515,2127] pg/mL), tumor necrosis factor-alpha (median [25th, 75th percentile], 4.8 [1.2,91] vs 163 [46,205] pg/mL), and interleukin-10 responses, when compared with saline solution-injected dams. CONCLUSION: Maternal lipopolysaccharide exposure suppresses offspring innate immune response to inflammatory stimuli. These results suggest that maternal inflammatory exposures during pregnancy may impair newborn infant innate responses and increase susceptibility to infection.
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