Renal hypouricemia

Research Hypothesis
Our hypothesis is that novel mutations in the SLC2A9 gene, particularly the newly identified c.1004T>A mutation, contribute to recurrent episodes of exercise-induced acute kidney injury (EIAKI) even under low-intensity physical activity. This study aims to elucidate the genetic underpinnings of Renal Hypouricemia Type 2 (RHUC2) and understand the mechanisms through which these mutations cause kidney injury.

Data Description and Collection
The data was gathered from genetic sequencing and clinical analysis of a 30-year-old male patient who experienced recurrent EIAKI without engaging in high-intensity exercise. The key genetic findings include:

SLC2A9(NM_020041.3)
.646G>A p.(Gly216Arg)
Location: Chr4:9982251
ClinVar ID: 1049499 (Uncertain significance)
SLC2A9(NM_020041.3)
.1004T>A p.(Ile335Asn)
Location: Chr4:9909968

Notable Findings
Novel Mutation Discovery: The c.1004T>A (Ile335Asn) mutation in the SLC2A9 gene is previously undocumented, indicating a novel genetic variant associated with RHUC2.

Genetic Heterogeneity: These findings support the genetic heterogeneity of RHUC2, emphasizing the need for comprehensive genetic testing in patients with unexplained AKI.

研究假设
我们提出如下假设：SLC2A9基因的新型突变，尤其是新发现的c.1004T>A突变，即便在低强度体力活动下，仍会导致复发性运动诱导性急性肾损伤（exercise-induced acute kidney injury，EIAKI）。本研究旨在阐明2型肾性低尿酸血症（Renal Hypouricemia Type 2，RHUC2）的遗传基础，并解析此类突变引发肾损伤的具体机制。

数据描述与采集
本研究数据源自一名30岁男性患者的基因测序与临床分析，该患者在未进行高强度运动的情况下出现复发性运动诱导性急性肾损伤。主要遗传学发现如下：
SLC2A9(NM_020041.3)
.646G>A p.(Gly216Arg)
位点：Chr4:9982251
ClinVar编号：1049499（意义未明）
SLC2A9(NM_020041.3)
.1004T>A p.(Ile335Asn)
位点：Chr4:9909968

重要发现
新型突变发现：SLC2A9基因中的c.1004T>A（Ile335Asn）突变此前未见文献报道，提示该新型遗传变异与2型肾性低尿酸血症相关。
遗传异质性：上述发现支持2型肾性低尿酸血症存在遗传异质性，强调了对不明原因急性肾损伤（acute kidney injury，AKI）患者进行全面基因检测的必要性。