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Huang, Zhelan; Shen, Qian; Wu, Bingbing; Wang, Huijun; Dong, Xinran; Lu, Yulan; Cheng, Guoqiang; Wang, Laishuan; Lu, Wei; Chen, Liping; Kang, Wenqing; Li, Long; Pan, Xinnian; Wei, Qiufen; Zhuang, Deyi; Chen, Dongmei; Yin, Zhaoqing; Yang, Ling; Ni, Qi; Liu, Renchao; Li, Gang; Zhang, Ping; Qian, Yanyan; Peng, Xiaomin; Wang, Yao; Cao, Yun; Xu, Hong; Hu, Liyuan; Yang, Lin; Zhou, Wenhao
Kidney international reports, 11/2023, Volume: 8, Issue: 11Journal Article
Congenital anomalies of the kidney and urinary tract (CAKUT) corresponds to a spectrum of defects. Several large-cohort studies have used high-throughput sequencing to investigate the genetic risk of CAKUT during antenatal, childhood, and adulthood period. However, our knowledge of newborns with CAKUT is limited. This multicenter retrospective cohort study explored the genetic spectrum of CAKUT in a Chinese neonatal cohort. Clinical data and whole exome sequencing (WES) data of 330 newborns clinically diagnosed with CAKUT were collected. WES data were analyzed for putative deleterious single nucleotide variants (SNVs) and potential disease-associated copy number variants (CNVs). In this study, pathogenic variants were identified in 61 newborns (18.5%, 61/330), including 35 patients (57.4%) with SNVs, 25 patients (41%) with CNVs, and 1 patient with both an SNV and a CNV. Genetic diagnosis rates were significantly higher in patients with extrarenal manifestations (P<0.001), especially in those with cardiovascular malformations (P<0.05). SNVs in genes related to syndromic disorders (CAKUT with extrarenal manifestations) were common, affecting 20 patients (57.1%, 20/35). KMT2D was the most common gene (5 patients) and 17q12 deletion was the most common CNV (4 patients). Patient 110 was detected with both a CNV (17q12 deletion) and an SNV (a homozygous variant of SLC25A13). Among the newborns with positive genetic results, 22 (36.1%, 22/61) patients may benefit from a molecular diagnosis and change in clinical management (including early multidisciplinary treatment, disease-specific follow-up, and familial genetic counseling). This study shows the heterogeneous genetic etiologies in a Chinese CAKUT neonatal cohort by using WES. Patients with CAKUT who have extrarenal manifestations are more likely to harbor genetic diagnoses. Kabuki syndrome and 17q12 deletion syndrome were the most common genetic findings. Approximately 36.1% of the patients may benefit from molecular diagnoses and a change in clinical management. Display omitted
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