随着衰老的内皮功能障碍:性是否重要?
Jakub Jozue Wojtacha1, Barbara Morawin1, Edyta Wawrzyniak-Gramacka1
1Department of Applied and Clinical Physiology, University of Zielona Gora, 28 Zyty Str., 65-417 Zielona Gora, Poland.
International journal of molecular sciences
|November 27, 2024
概括
这项研究揭示了老年人中氧化应激和炎症标志物的性别特异性差异,影响血管疾病风险. 了解这些特定于性别的氧-炎症反应对于预测和预防老年人群中心血管事件至关重要.
科学领域:
- 老年学和心血管研究研究.
- 氧化应激和炎症的生物化学
- 基于性别的健康差异
背景情况:
- 老年人的内皮功能障碍与过度反应性氧和物种 (RONS) 的氧化应激和炎症有关.
- 现有的研究往往忽略了这些生理过程中的性别特异性变异,这可能会限制有效的血管疾病预测和预防策略.
- 了解RONS,炎症和内皮健康的相互作用对于解决老年人群中心血管风险至关重要.
研究的目的:
- 研究血清氧-炎症标志物对预测和预防血管疾病的有用性,特别关注性别差异.
- 阐明老年妇女和男性中氧化应激和炎症的独特机制.
- 确定可靠的性别特异性生物标志物,以评估内皮功能障碍和心血管风险.
主要方法:
- 对145名女性和50名男性 (平均年龄为72.2±7.8岁) 的血清样本进行过氧化 (H2O2),氧化 (NO) 和3-甲酸铁 (3-NitroT) 水平的分析.
- 评估NO/3-NitroT比率与内皮功能障碍之间的性别相关性.
- 评估炎症特异性变量 (中性粒细胞与淋巴细胞的比率,全身免疫炎症指数,中性粒细胞与高血糖的比率,CRP与高血糖的比率) 和它们的诊断效用.
主要成果:
- 老年女性的H2O2和NO产量增加,NO生物可用性降低 (3-NitroT高),表明性别特异性内皮功能障碍.
- NO/3-NitroT关系在性别之间有显著差异 (女性: rs = 0.811;男性: rs = -0.611),突出性别作为内皮功能障碍的决定因素.
- 女性表现出循环原生细胞增加,表明内皮细胞同时再生,炎症标志物减少,CRP-HDL比率显示出高诊断效用 (AUC = 0.980).
结论:
- 这项研究是首次证明氧炎反应的性别特异性变化有助于老年人血管功能障碍.
- 性别特定的生物标志物,特别是C反应蛋白与HDL的比率,可以有效地预测血管功能障碍的临床预后.
- 这些发现强调了在评估和管理老年人心血管疾病风险时考虑性别的重要性.
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