CHOLESTATIC LIVER DISEASE CONSORTIUM (CLIC): LONGITUDINAL STUDY OF GENETIC CAUSE

这个子项目是许多研究子项目中的一个 由NIH/NCRR资助的中心赠款提供的资源。子项目和 研究者（PI）可能从另一个NIH来源获得了主要资金， 因此可以在其他CRISP条目中表示。所列机构为 研究中心，而研究中心不一定是研究者所在的机构。 这项纵向观察性研究将调查儿童肝内胆汁淤积症的四种遗传原因的自然史和进展，包括α-1抗胰蛋白酶缺乏症（α 1-AT）、Alagille综合征（AGS）、进行性家族性肝内胆汁淤积症（PFIC）和胆汁酸合成缺陷（BAD）。这项研究将作为胆汁淤积性肝病联盟（CLiC）的一部分进行，CLiC是NIH资助的多中心罕见疾病临床研究联盟。在这项研究中，我们将以固定的时间间隔以统一的方式收集相对大量的这些罕见疾病患者的定义数据元素，为期五年。 此外，将建立患者标本和DNA样本的生物库，用于除本研究外进行的辅助研究。 通过比较四种肝脏疾病之间的结果指标（即，使用每种疾病作为其它疾病的疾病控制），与其它肝脏疾病相比，可以最好地确定每种疾病的全部影响。 以这种方式使用纵向数据库，这项研究将提供一个更好的了解儿童期胆汁淤积性肝脏的影响，无论潜在的病因，以及每种疾病的病理生理学，结果和并发症。 这一初步表征将允许计算未来治疗干预临床试验的样本量，并提供干预措施应与之进行比较的基线。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. This longitudinal observational study will investigate the natural history and progression of four genetic causes of intrahepatic cholestasis of childhood, including alpha-1 antitrypsin deficiency (a1-AT), Alagille syndrome (AGS), progressive familial intrahepatic cholestasis (PFIC), and bile acid synthesis defects (BAD). This study will be conducted as part of the Cholestatic Liver Disease Consortium (CLiC), an NIH-funded multi-centered Rare Disease Clinical Research Consortium. In this study, we will collect defined data elements in a uniform fashion at fixed intervals for five years over a relatively large number of patients with these rare disorders. In addition, a biobank of patient specimens and DNA samples will be established for use in ancillary studies to be performed in addition to this study. By comparing outcome measures between the four liver diseases (i.e., using each disorder as a disease-control for the other disorders), the full impact of each disorder can best be determined in comparison to the other liver diseases. Using the longitudinal database in this fashion, this study will provide an improved understanding of the effects of the cholestatic liver during childhood irrespective of the underlying etiology as well as to the pathophysiology, outcome, and complications of each of the disorders. This initial characterization will allow calculation of sample sizes for future therapeutic intervention clinical trials and provide the baseline to which interventions should be compared.