遗传性远端肾小管性酸中毒的病理生理学、诊断和治疗。
Pathophysiology, diagnosis and treatment of inherited distal renal tubular acidosis.
机构信息
Division of Nephrology, University Hospital Zurich, Rämistrasse 100, 8091, Zurich, Switzerland.
National Center for Competence in Research NCCR Kidney.CH, Zurich, Switzerland.
出版信息
J Nephrol. 2018 Aug;31(4):511-522. doi: 10.1007/s40620-017-0447-1. Epub 2017 Oct 9.
Distal renal tubular acidosis (dRTA) is a tubular disorder with a primary defect of urinary acidification and acid excretion in the collecting duct system. Consequently, patients develop hyperchloremic metabolic acidosis with an inappropriately alkaline urine. Inherited forms of dRTA are due to mutations in at least three distinct genes: SLC4A1, ATP6V1B1, ATP6V0A4. Mutations in SLC4A1-(AE1) are inherited either in an autosomal dominant manner or in a recessive one. ATP6V1B and ATP6V0A4 mutations affect two different subunits of the vacuolar H-ATPase proton-pump, the B1 and a4 subunits, and are inherited in an autosomal recessive manner. Clinical manifestations of inherited forms of dRTA usually occur during infancy or childhood. However, heterozygous carriers of ATP6V1B1 and ATP6V0A4 mutations may have a higher risk of developing nephrolithiasis and nephrocalcinosis in adulthood, respectively. In full forms of dRTA, patients may present with mild clinical symptoms, such as mild metabolic acidosis and incidental detection of kidney stones, as well as with more severe manifestations such as failure to thrive, severe metabolic acidosis, and nephrocalcinosis. Progressive sensorineural hearing loss develops in the majority of patients with recessive dRTA (ATP6V1B1 and ATP6V0A4 mutations). Some patients with recessive dRTA may also develop abnormal widening of the vestibular aqueduct. This review will discuss our current understanding of the pathophysiology of inherited forms of dRTA, diagnosis and prognosis of patients, and therapy.
远端肾小管性酸中毒(dRTA)是一种管状疾病,其特征是在集合管系统中存在尿液酸化和酸排泄的原发性缺陷。因此,患者会出现伴有不适当碱性尿液的高氯代谢性酸中毒。dRTA 的遗传性形式是由于至少三个不同基因的突变引起的:SLC4A1、ATP6V1B1、ATP6V0A4。SLC4A1-(AE1)的突变以常染色体显性或常染色体隐性方式遗传。ATP6V1B 和 ATP6V0A4 突变影响液泡 H+-ATP 酶质子泵的两个不同亚基,即 B1 和 a4 亚基,以常染色体隐性方式遗传。遗传性 dRTA 的临床表现通常发生在婴儿期或儿童期。然而,ATP6V1B1 和 ATP6V0A4 突变的杂合携带者在成年后可能分别有更高的肾结石和肾钙质沉着症的风险。在完全形式的 dRTA 中,患者可能表现出轻微的临床症状,例如轻度代谢性酸中毒和偶然发现肾结石,以及更严重的表现,如生长不良、严重代谢性酸中毒和肾钙质沉着症。大多数隐性 dRTA(ATP6V1B1 和 ATP6V0A4 突变)患者会出现进行性感觉神经性听力损失。一些隐性 dRTA 患者也可能出现前庭水管异常增宽。本综述将讨论我们目前对遗传性 dRTA 的病理生理学、患者的诊断和预后以及治疗的理解。