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Toll-like receptors and agonist responses in the developing fetal sheep lung
被引:59
作者:

Hillman, Noah H.
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Univ Cincinnati, Cincinnati Childrens Hosp, Med Ctr, Div Pulm Biol, Cincinnati, OH 45229 USA Univ Cincinnati, Cincinnati Childrens Hosp, Med Ctr, Div Pulm Biol, Cincinnati, OH 45229 USA

Moss, Timothy J. M.
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Univ Western Australia, Sch Womens & Infants Hlth, Perth, WA 6009, Australia Univ Cincinnati, Cincinnati Childrens Hosp, Med Ctr, Div Pulm Biol, Cincinnati, OH 45229 USA

Nitsos, Ilias
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机构:
Univ Western Australia, Sch Womens & Infants Hlth, Perth, WA 6009, Australia Univ Cincinnati, Cincinnati Childrens Hosp, Med Ctr, Div Pulm Biol, Cincinnati, OH 45229 USA

Kramer, Boris W.
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Acad Ziekenhuis Maastricht, Dept Pediat, NL-6202 AZ Maastricht, Netherlands Univ Cincinnati, Cincinnati Childrens Hosp, Med Ctr, Div Pulm Biol, Cincinnati, OH 45229 USA

Bachurski, Cindy J.
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机构:
Univ Cincinnati, Cincinnati Childrens Hosp, Med Ctr, Div Pulm Biol, Cincinnati, OH 45229 USA Univ Cincinnati, Cincinnati Childrens Hosp, Med Ctr, Div Pulm Biol, Cincinnati, OH 45229 USA

Ikegami, Machiko
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Univ Cincinnati, Cincinnati Childrens Hosp, Med Ctr, Div Pulm Biol, Cincinnati, OH 45229 USA Univ Cincinnati, Cincinnati Childrens Hosp, Med Ctr, Div Pulm Biol, Cincinnati, OH 45229 USA

Jobe, Alan H.
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机构:
Univ Cincinnati, Cincinnati Childrens Hosp, Med Ctr, Div Pulm Biol, Cincinnati, OH 45229 USA Univ Cincinnati, Cincinnati Childrens Hosp, Med Ctr, Div Pulm Biol, Cincinnati, OH 45229 USA

Kallapur, Suhas G.
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h-index: 0
机构:
Univ Cincinnati, Cincinnati Childrens Hosp, Med Ctr, Div Pulm Biol, Cincinnati, OH 45229 USA Univ Cincinnati, Cincinnati Childrens Hosp, Med Ctr, Div Pulm Biol, Cincinnati, OH 45229 USA
机构:
[1] Univ Cincinnati, Cincinnati Childrens Hosp, Med Ctr, Div Pulm Biol, Cincinnati, OH 45229 USA
[2] Univ Western Australia, Sch Womens & Infants Hlth, Perth, WA 6009, Australia
[3] Acad Ziekenhuis Maastricht, Dept Pediat, NL-6202 AZ Maastricht, Netherlands
关键词:
D O I:
10.1203/PDR.0b013e3181647b3a
中图分类号:
R72 [儿科学];
学科分类号:
100202 ;
摘要:
Toll-like receptors (TLRs) are pattern recognition molecules that initiate innate immune responses. Intra-amniotic exposure of fetal sheep to pro-inflammatory stimuli causes pulmonary inflammation and induced lung maturation. We examined TLR ontogeny and fetal lung responsiveness to three different TLR agonists. We cloned ovine TLRs 2, 3, and 4 and found 83-88% homology between these ovine and human TLRs. Lung TLR2 and 4 mRNAs increased throughout late gestation to 50% of adult level in the term newborn lamb. Doses of 10 mg of PAMCysK(4) (TLR2 agonist), poly I:C dsRNA (TLR3 agonist), or E. coli 055:135 lipopoysaccharide (LPS) (TLR4 agonist) were given by intra-amniotic injection 2 d or 7 d before operative delivery of preterm lambs at 123 d (n = 4-7/group). The TLR4 agonist induced lung inflammation and mate uration, whereas the TLR2 agonist gave less consistent responses. Intra-amniotic LPS increased TLR2 mRNA expression primarily in the inflammatory cells and TLR4 mRNA diffusely in multiple cell types. The TLR3 agonist had no effects, and TLR3 mRNA in the fetal lung did not change after LPS exposure. We conclude that TLR2 and TLR4 mRNAs increase through gestation and expression of TLR2 and TLR4 are induced by LPS in the fetal sheep lung.
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页码:388 / 393
页数:6
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