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Melatonin Alters Innate Immune Function in Infants with Neonatal Encephalopathy.
Neonatology ( IF 2.5 ) Pub Date : 2023-06-15 , DOI: 10.1159/000527714
Saima Aslam 1, 2, 3 , Mary O'Dea 1, 2, 4 , Lynne A Kelly 5, 6 , Amanda O'Neill 7 , Ellen McKenna 1, 2 , Tim Hurley 1, 2, 4 , Aoife Branagan 1, 2, 4 , David O'Driscoll 1, 2, 7 , Caoimhe Normile 7 , Shahid Saleemi 1, 2 , Deirdre Sweetman 8 , Claudine Vavasseur 8 , John Murphy 8 , Veronica Donoghue 8 , William Watson 7 , Eleanor J Molloy 1, 2, 3, 4, 9
Affiliation  

INTRODUCTION Melatonin has been suggested an adjunctive therapy in neonatal encephalopathy (NE). Melatonin reduces oxidative stress and neutrophil activation; however, the immunological effects in NE have not been studied. METHODS Infants with NE and neonatal controls were prospectively recruited. Whole blood was sampled in the first week of life. Following endotoxin and or melatonin treatment, diurnal variation was measured by RT PCR for circadian rhythm genes (brain and Muscle Arnt-Like protein [BMAL1], circadian locomotor output cycles kaput [CLOCK], Nuclear Receptor Subfamily 1 Group D Member 2 [REV Erβ], and cryptochrome circadian clock [CRY]). Neutrophil and monocyte cell surface markers of activation CD11b, reactive oxygen intermediates (ROIs), and Toll-like receptor (TLR)-4 were also examined by flow cytometry in matching samples. RESULTS Serum and RNA samples from forty infants were included (controls n = 20; NE n = 20) over the first week of life. Melatonin reduced neutrophil CD11b and TLR-4 expression in response to LPS in infants with NE compared to controls. There were no differences in ROIs. BMAL1 and CLOCK baseline gene expression levels were similar. BMAL1 was significantly decreased with LPS stimulation in NE. There was no significant diurnal variation in melatonin, neutrophil, and monocyte function or circadian genes. CONCLUSIONS Melatonin alters immune function ex vivo in infants with NE. Infants with NE have altered immune circadian responses following LPS stimulation, which have potential for modulation.

中文翻译:

褪黑激素改变患有新生儿脑病的婴儿的先天免疫功能。

简介 褪黑激素被建议作为新生儿脑病 (NE) 的辅助治疗。褪黑激素可减少氧化应激和中性粒细胞活化;然而,尚未研究 NE 中的免疫学作用。方法 前瞻性招募患有 NE 的婴儿和新生儿对照。在生命第一周采集全血样本。内毒素和/或褪黑激素治疗后,通过 RT PCR 测量昼夜节律基因(大脑和肌肉 Arnt 样蛋白 [BMAL1]、昼夜运动输出周期 kaput [CLOCK]、核受体亚家族 1 D 组成员 2 [REV Erβ] 的昼夜变化],和隐花生物钟[CRY])。还通过流式细胞术检查了匹配样本中的中性粒细胞和单核细胞表面活化 CD11b 标记、活性氧中间体 (ROI) 和 Toll 样受体 (TLR)-4。结果 纳入了 40 名婴儿出生后第一周的血清和 RNA 样本(对照 n = 20;NE n = 20)。与对照组相比,NE 婴儿对 LPS 的反应中,褪黑素降低了中性粒细胞 CD11b 和 TLR-4 的表达。投资回报率没有差异。BMAL1 和 CLOCK 基线基因表达水平相似。NE 中的 BMAL1 在 LPS 刺激下显着降低。褪黑激素、中性粒细胞和单核细胞功能或昼夜节律基因没有显着的昼夜变化。结论 褪黑素会改变 NE 婴儿的离体免疫功能。患有 NE 的婴儿在 LPS 刺激后改变了免疫昼夜节律反应,这具有调节的潜力。与对照组相比,NE 婴儿对 LPS 的反应中,褪黑素降低了中性粒细胞 CD11b 和 TLR-4 的表达。投资回报率没有差异。BMAL1 和 CLOCK 基线基因表达水平相似。NE 中的 BMAL1 在 LPS 刺激下显着降低。褪黑激素、中性粒细胞和单核细胞功能或昼夜节律基因没有显着的昼夜变化。结论 褪黑素会改变 NE 婴儿的离体免疫功能。患有 NE 的婴儿在 LPS 刺激后改变了免疫昼夜节律反应,这具有调节的潜力。与对照组相比,NE 婴儿对 LPS 的反应中,褪黑素降低了中性粒细胞 CD11b 和 TLR-4 的表达。投资回报率没有差异。BMAL1 和 CLOCK 基线基因表达水平相似。NE 中的 BMAL1 在 LPS 刺激下显着降低。褪黑激素、中性粒细胞和单核细胞功能或昼夜节律基因没有显着的昼夜变化。结论 褪黑素会改变 NE 婴儿的离体免疫功能。患有 NE 的婴儿在 LPS 刺激后改变了免疫昼夜节律反应,这具有调节的潜力。褪黑激素、中性粒细胞和单核细胞功能或昼夜节律基因没有显着的昼夜变化。结论 褪黑素会改变 NE 婴儿的离体免疫功能。患有 NE 的婴儿在 LPS 刺激后改变了免疫昼夜节律反应,这具有调节的潜力。褪黑激素、中性粒细胞和单核细胞功能或昼夜节律基因没有显着的昼夜变化。结论 褪黑素会改变 NE 婴儿的离体免疫功能。患有 NE 的婴儿在 LPS 刺激后改变了免疫昼夜节律反应,这具有调节的潜力。
更新日期:2023-06-15
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