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首页> 外文期刊>The FASEB Journal >Photoacoustic imaging for in vivo quantification of placental oxygenation in mice
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Photoacoustic imaging for in vivo quantification of placental oxygenation in mice

机译:用于小鼠胎盘氧合的体内定量的光声成像

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Accurate analysis of placental and fetal oxygenation is critical during pregnancy. Photoacoustic imaging (PAI) combines laser technology with ultrasound in real time. We tested the sensitivity and accuracy of PAI for analysis of placental and fetal oxygen saturation (sO(2)) inmice. The placental labyrinth (L) had a higher sO(2) than the junctional zone plus decidua region (JZ+D) inC57Bl/6mice. ChangingmaternalO(2) from 100 to 20 inC57Bl/6mice lowered sO(2) in these regions. C57Bl/6 mice were treated with the NO synthase inhibitor L-N-G-nitroarginine methyl ester (L-NAME) from gestational day (GD) 11 to GD18 to induce hypertension. L-NAME decreased sO2 in L and JZ+DatGD14 and GD18 in associationwith fetal growth restriction and higher blood pressure. Hypoxia-inducible factor 1 alpha immunostaining was higher in L-NAME vs. control mice at GD14. Fetal sO(2) levels were similar between L-NAME and controlmice atGD14 and GD18. In contrast to untreated C57Bl/6, L-NAMEdecreased placental sO(2) at GD14 and GD18 vs. GD10 or GD12. Placental sO(2) was lower in fetal growth restriction in an angiotensin-converting enzyme 2 knockout mouse model characterized by placental hypoxia. On phantom studies, patterns of sO(2) measured directly correlated with those measured by PAI. In summary, PAI enables the detection of placental and fetal oxygenation during normal and pathologic pregnancies in mice.
机译:在怀孕期间,准确分析胎盘和胎儿氧合至关重要。光声成像 (PAI) 将激光技术与超声波实时相结合。我们测试了PAI分析胎盘和胎儿血氧饱和度(sO(2))小鼠的灵敏度和准确性。在C57Bl/6小鼠中,胎盘迷路(L)的sO(2)高于交界区加蜕膜区(JZ+D)。将maternalO(2)从100%更改为20%inC57Bl/6小鼠降低了这些区域的sO(2)。C57Bl/6小鼠从妊娠日(GD)11到GD18用NO合酶抑制剂L-N-G-硝基精氨酸甲酯(L-NAME)治疗,以诱导高血压。L-NAME 降低 L 和 JZ+DatGD14 和 GD18 的 sO2,与胎儿生长受限和血压升高有关。在GD14时,L-NAME的缺氧诱导因子1α免疫染色高于对照组。L-NAME和对照小鼠在GD14和GD18处的胎儿sO(2)水平相似。与未经处理的 C57Bl/6 相比,L-NAME 在 GD14 和 GD18 处降低胎盘 sO(2)。在以胎盘缺氧为特征的血管紧张素转换酶 2 敲除小鼠模型中,胎盘 sO(2) 在胎儿生长受限方面较低。在幻影研究中,测得的sO(2)模式与PAI测得的模式直接相关。总之,PAI能够检测小鼠正常和病理性妊娠期间的胎盘和胎儿氧合。

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