Characterization of neutrophil subsets in healthy human pregnancies.

Characterization of neutrophil subsets in healthy human pregnancies.
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DOI:
10.1371/journal.pone.0085696
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Müller I
Müller I
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Ssemaganda A;Kindinger L;Bergin P;Nielsen L;Mpendo J;Ssetaala A;Kiwanuka N;Munder M;Teoh TG;Kropf P;Müller I

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我们以前已经证明,在成功的怀孕中,精氨酸酶活性的增加是一种有助于抑制母体免疫系统的机制。我们确定精氨酸酶表达细胞的主要类型是外周血单核细胞和足月胎盘中的一群激活的低密度粒细胞(LDGs)。在本研究中,我们分析了LDGs的表型,并将其与母亲外周血、胎盘活检组织和脐带血中正常密度粒细胞(NDGs)的表型进行了比较。我们的数据显示,在胎盘活检组织中只检测到LDGs,而没有NDGs。从表型上看,母血和脐血中的NDGs和LDGs表达不同程度的成熟、激活和脱颗粒标志物。母血和脐血NDGs的表型相似,而母血、脐血和胎盘LDGs的CD66b表达水平不同。与母体和胎盘LDGs相比,脐带血中LDGs表达的精氨酸酶水平更高。综上所述,我们的结果表明,在母血和脐血中,可以识别出两种表型不同的中性粒细胞群体,而在足月胎盘中,只有激活的中性粒细胞存在。
We have previously shown that in successful pregnancies increased arginase activity is a mechanism that contributes to the suppression of the maternal immune system. We identified the main type of arginase-expressing cells as a population of activated low-density granulocytes (LDGs) in peripheral blood mononuclear cells and in term placentae. In the present study, we analyzed the phenotype of LDGs and compared it to the phenotype of normal density granulocytes (NDGs) in maternal peripheral blood, placental biopsies and cord blood. Our data reveal that only LDGs but no NDGs could be detected in placental biopsies. Phenotypically, NDGs and LDGs from both maternal and cord blood expressed different levels of maturation, activation and degranulation markers. NDGs from the maternal and cord blood were phenotypically similar, while maternal, cord and placental LDGs showed different expression levels of CD66b. LDGs present in cord blood expressed higher levels of arginase compared to maternal and placental LDGs. In summary, our results show that in maternal and cord blood, two phenotypically different populations of neutrophils can be identified, whereas in term placentae, only activated neutrophils are present.
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