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Compartmentalized profiling of amniotic fluid cytokines in women with preterm labor.
PLOS ONE ( IF 2.9 ) Pub Date : 2020-01-16 , DOI: 10.1371/journal.pone.0227881
Gaurav Bhatti 1, 2 , Roberto Romero 1, 3, 4, 5, 6, 7 , Gregory Edward Rice 8 , Wendy Fitzgerald 9 , Percy Pacora 1, 10 , Nardhy Gomez-Lopez 1, 10, 11 , Mahendra Kavdia 2 , Adi L Tarca 1, 10, 12 , Leonid Margolis 9
Affiliation  

OBJECTIVE Amniotic fluid cytokines have been implicated in the mechanisms of preterm labor and birth. Cytokines can be packaged within or on the surface of extracellular vesicles. The main aim of this study was to test whether the protein abundance internal to and on the surface of extracellular vesicles changes in the presence of sterile intra-amniotic inflammation and proven intra-amniotic infection in women with preterm labor as compared to the women with preterm labor without either intra-amniotic inflammation or proven intra-amniotic infection. STUDY DESIGN Women who had an episode of preterm labor and underwent an amniocentesis for the diagnosis of intra-amniotic infection or intra-amniotic inflammation were classified into three groups: 1) preterm labor without either intra-amniotic inflammation or proven intra-amniotic infection, 2) preterm labor with sterile intra-amniotic inflammation, and 3) preterm labor with intra-amniotic infection. The concentrations of 38 proteins were determined on the extracellular vesicle surface, within the vesicles, and in the soluble fraction of amniotic fluid. RESULTS 1) Intra-amniotic inflammation, regardless of detected microbes, was associated with an increased abundance of amniotic fluid cytokines on the extracellular vesicle surface, within vesicles, and in the soluble fraction. These changes were most prominent in women with proven intra-amniotic infection. 2) Cytokine changes on the surface of extracellular vesicles were correlated with those determined in the soluble fraction; yet the magnitude of the increase was significantly different between these compartments. 3) The performance of prediction models of early preterm delivery based on measurements on the extracellular vesicle surface was equivalent to those based on the soluble fraction. CONCLUSIONS Differential packaging of amniotic fluid cytokines in extracellular vesicles during preterm labor with sterile intra-amniotic inflammation or proven intra-amniotic infection is reported herein for the first time. The current study provides insights into the biology of the intra-amniotic fluid ad may aid in the development of biomarkers for obstetrical disease.

中文翻译:

早产妇女羊水细胞因子的区划分析。

目的羊水细胞因子与早产和分娩的机制有关。细胞因子可以包装在细胞外囊泡内或表面上。这项研究的主要目的是检验与早产妇女相比,早产妇女存在无菌羊水内炎症和已证明羊膜内感染的情况下,细胞外囊泡内部和表面的蛋白质丰度是否发生了变化。没有羊水内炎症或已证明羊水内感染的人工。研究设计患有早产发作并接受羊膜穿刺术以诊断羊膜内感染或羊膜内炎症的妇女分为三组:1)没有羊膜内炎症或已证实羊膜内感染的早产,2)早产有无菌羊水内炎症,3)早产有羊水内感染。在细胞外囊泡表面,囊泡内以及羊水的可溶部分中测定了38种蛋白质的浓度。结果1)羊水内炎症,无论是否检测到微生物,都与细胞外囊泡表面,囊泡内和可溶性部分中羊水细胞因子的增加有关。这些变化在经证实的羊膜内感染的女性中最为明显。2)细胞外囊泡表面细胞因子的变化与可溶性部分的变化有关。但是,这些隔间之间的增加幅度明显不同。3)基于对细胞外囊泡表面的测量的早期早产预测模型的性能与基于可溶性分数的预测模型的性能相同。结论本文首次报道了在早产期间因无菌羊水内炎症或已证实的羊水内感染而导致的羊水细胞因子在细胞外囊泡中的不同包装。当前的研究提供了对羊水的生物学研究的见解,可能有助于产科疾病生物标志物的开发。结论本文首次报道了在早产期间因无菌羊水内炎症或已证实的羊水内感染而导致的羊水细胞因子在细胞外囊泡中的不同包装。当前的研究提供了对羊水内膜生物学的见解,可能有助于产科疾病生物标志物的开发。结论本文首次报道了在早产期间因无菌羊水内炎症或已证实的羊水内感染而导致的羊水细胞因子在细胞外囊泡中的不同包装。当前的研究提供了对羊水的生物学研究的见解,可能有助于产科疾病生物标志物的开发。
更新日期:2020-01-17
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