在囊性纤维化中挑战的尿液二碳酸盐分泌试验:尿酸/基参数的全面分析
Amalie Q Rousing1, Majbritt Jeppesen2, Søren Jensen-Fangel2
1Department of Biomedicine, Aarhus University, Aarhus, Denmark.
挑战性尿液二碳酸盐 (HCO3-) 测试有效地评估囊性纤维化转膜导电性调节器 (CFTR) 在患有囊性纤维化 (pwCF) 患者中的功能. 这项测试显示pwCF中脏酸分泌受损,CFTR调节器治疗改善.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學專業.
- 肺部病理学 肺部病理学
- 遗传学 是一个遗传学.
背景情况:
- 双碳酸盐 (HCO3-) 的脏分泌受囊性纤维化跨膜导电调节器 (CFTR) 蛋白质的调节.
- 囊性纤维化 (pwCF) 患者的CFTR功能受损导致缺陷的脏HCO3-分泌.
- 被挑战的尿液HCO3-测试,涉及口服二碳酸 (NaHCO3) 负载,被提议作为CFTR功能的潜在体内生物标志物.
研究的目的:
- 为了研究尿液酸参数在NaHCO3加载后的变化.
- 综合评估对挑战性尿液HCO3-测试的生理反应.
- 评估尿液中HCO3-分泌作为评估CFTR功能的主要结果指标.
主要方法:
- 测量了尿液中的酸参数,包括可定位酸 (TA),氨 (NH4+),净酸分泌 (NAE) 和pH.
- 对10个对照组和50个pwCF的生物储存尿样进行了分析.
- 评估了尿液酸参数,CF疾病特征和CFTR调节器治疗效果之间的关联.
主要成果:
- 在治疗前,尿中的TA和NAE在pwCF中较低,具有残留功能突变,并与胰腺充足相关.
- 较低的TA,NH4+和NAE分泌与更高的FEV1百分比相关.
- CFTR调节器治疗导致pwCF中的TA分泌和NAE减少.
结论:
- 尿液中的HCO3-排泄精确地反映了NaHCO3加载后尿液中的其他酸参数.
- 观察到的酸分泌的变化支持CFTR调节器诱导的CFTR依赖型B间歇细胞HCO3-分泌的增强.
- 挑战性尿液HCO3-测试显示为CFTR功能的生物标志物具有前途.
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