Correlation between polymorphisms of the aquaporin-1 gene and peritoneal function in children on chronic peritoneal dialysis.

BACKGROUND

Aquaporins (AQPs) are a class of proteins that transport water molecules across membranes, which can promote water transport in cells. We aimed to explore the correlation between different polymorphisms of AQP1 and peritoneal function in children on peritoneal dialysis (PD).

METHODS

Children who underwent PD at the Children's Hospital of Fudan University from January 1, 2014, to December 31, 2023, were included. The AQP1 genotypes of the four polymorphisms were rs2075574 (TT, CT, CC), rs1049305 (GG, CG, CC), rs10253374 (TT, CT, CC) and rs17159702 (TT, CT, CC).

RESULTS

A total of 187 children on chronic PD were included in the study. We found that the TT group with rs2075574 exhibited a lower baseline peritoneal equilibration test (PET) ultrafiltration level than the CC group (302 ± 129 vs. 408 ± 168 ml/m2, P = 0.015). For rs1049305, the CC group had a higher pKT/V than both the GG (2.71 ± 1.25 vs. 2.27 ± 0.79, P = 0.04) and CG groups (2.71 ± 1.25 vs. 2.24 ± 0.88, P = 0.03). Additionally, at 12-month follow-up, the CC (410 ± 160 ml/m2, P = 0.04) and CG (393 ± 174 ml/m2, P = 0.04) groups of rs1049305 showed higher PET ultrafiltration than the GG group (239 ± 288 ml/m2). No significant correlation was observed between the four genotypes and adverse events.

CONCLUSIONS

AQP1 rs2075574 and rs1049305 polymorphisms might be associated with ultrafiltration and urea transport in children with PD.