一种新的DNase测定揭示了严重喘中低DNase活性
Annabelle R Charbit1, Maude A Liegeois1, Wilfred W Raymond1
1Cardiovascular Research Institute (CVRI), University of California, San Francisco, California, United States.
概括
脱氧核糖核酶 (DNase) 活性在喘气道中降低,与疾病严重程度增加和粘液堵塞相关. 这种损伤可能源于DNase-I.I.的以奥西诺菲尔介导的碳amylation.
科学领域:
- 呼吸系统医学 呼吸系统医学
- 生物化学 生物化学
- 免疫学 免疫学 免疫学
背景情况:
- 细胞外DNA有助于喘中的呼吸道炎症.
- 内源性脱氧核糖核酶 (DNases) 解决炎症并防止自身免疫.
- 在喘呼吸道中的DNase活性仍然不太清楚.
研究的目的:
- 在健康个体和喘患者中描述DNase活性.
- 调查DNase活性与喘严重程度之间的关系.
- 探索喘中DNase功能障碍的潜在机制.
主要方法:
- 开发了一种新的基于Taqman探针的动力测试方法,用于测量DNase活动.
- 评估了439名喘患者 (严重喘研究计划 (SARP) -3) 和89名健康对照者的吐中的DNase活性.
- 与喘的临床和病理特征相关的DNase活性.
主要成果:
- 与健康对照人群相比,喘呼吸道中的DNase活性显著降低 (78.7RFU/分钟对120.4RFU/分钟).
- 具有较低DNase活性的喘患者表现出更严重的疾病,呼吸道叶绿素和粘液堵塞.
- 以乙氨基氧化酶为媒介的碳amylation 被确定为一个潜在的 DNase-I.I. 失活剂.
结论:
- 一种新的DNase测定揭示了喘气道中DNase活性受损.
- 低DNase活性与更严重的喘表型有关,包括粘液堵塞.
- 埃索诺菲尔介导的碳amylation 可能有助于DNase在喘中的失活.
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