患有唐氏综合征和肺动脉高压的儿童--生物标志物改变

2021-10-25 刘少飞 MedSci原创

评估唐氏综合征儿童肺动脉高压 (PH) 生物标志物的性能,唐氏综合征是 PH 的独立危险因素,其生物标志物的性能可能与其他人群不同。

唐氏综合征(Down′s syndrome,DS)是1866年由英国医生Down首次做出全面描述,因此被称为Down综合征,是由于人体细胞中第21对染色体产生变异,导致额外的遗传物质复制引起,故又称为21三体综合征。该综合征在活产新生儿中的发病率约为1/700,是最常见的常染色体畸变所导致的疾病,也是引起儿童发育障碍和智力缺陷最常见的染色体病。DS 患者在新生儿早期、婴儿期和儿童期发生心肺疾病的风险增加,表现为肺动脉压升或者心肌功能改变。在这一人群中,新生儿早期的肺动脉高压 (PH) 仍未得到充分认识。DS 患儿可能伴有或不伴有先天性心脏缺陷,并且比一般人群更常见。

唐氏综合征是 PH 的独立危险因素。本研究中,想通过对唐氏综合征儿童肺动脉高压 (PH) 生物标志物的检查,检测其生物标志物的性能是否与其他人群不同?

研究入选队列:患有唐氏综合症和 PH 的受试者(N = 29),唐氏综合症和已解决的 PH (N = 13),有唐氏综合症但没有 PH (N = 49),以及没有唐氏综合症的患者,参加世界肺动脉高压 (WSPH) 会议 I 组肺动脉高压(无唐氏综合症 PH,N= 173)。

检测指标:测量血清内皮抑素、白细胞介素 1 受体 1 (ST2)、半乳糖凝集素-3、NT-proBNP、IL-6 和肝癌衍生生长因子 (HDGF),其中评估每个生物标志物以区分唐氏综合症中的 PH。创建了一个分类树,以区分唐氏综合症儿童的 PH 与已解决的 PH 和无 PH。

研究初步结果:

无论 PH 状态如何,唐氏综合症患者的内皮抑素、半乳糖凝集素 3、HDGF 和 ST2 均升高并非所有标志物在患有唐氏综合症和 PH 的受试者与已解决的 PH 之间都不同。 NT-proBNP 和 IL-6 在患有 PH 的唐氏综合症受试者中与未患有唐氏综合症 PH 的受试者相似。分类树将 NT-proBNP 和 Galectin-3 确定为在唐氏综合症受试者中依次区分 PH、已解决 PH 和无 PH 的最佳标志物。

研究启示:蛋白质组学标记用于改善肺动脉高压的诊断和预后,但正如所证明的那样,可以在遗传独特的人群(如唐氏综合症)中进行改变。这进一步表明,临床生物标志物应该在独特的群体中进行评估,并制定特定人群的列线图。

 

参考文献:

Megan Griffiths, Biomarkers of Pulmonary Hypertension Are Altered in Children With Down Syndrome and Pulmonary Hypertension,
The Journal of Pediatrics,2021,ISSN 0022-3476, https://doi.org/10.1016/j.jpeds.2021.10.017.

 

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