Abstract
Heat shock protein (HSP)70 plays an important role in the ischemic tolerance of fetal and neonatal kidney. We have investigated the association of genetic polymorphisms of the constitutive HSP70 (HSP73) and the inducible HSP70 (HSP72) encoding genes with the risk of acute renal failure (ARF) in very low birth weight (VLBW) neonates. Thirty-seven VLBW neonates with ARF and 93 VLBW neonates without ARF were enrolled in the study. The presence of HSP72 (1267)AG and HSP73 (190)GC polymorphism was analyzed from dried blood samples by PCR and restriction length fragment polymorphism. Allelic prevalence was related to reference values obtained in 131 healthy adults. Stepwise binary logistic regression was applied to determine the independent effect of the established risk factors to the development of ARF. Sixteen of 37 VLBW neonates with ARF and 18 of 93 VLBW neonates without ARF were homozygous for HSP72 (1267)G allele (p ≤ 0.01). The association between HSP72 (1267)GG genotype and ARF remained at the level of significance (p = 0.05) when it was adjusted for established risk factors of neonatal ARF. Prevalence of HSP72 (1267)GG was also higher in VLBW neonates than in the reference population (p < 0.05) and in VLBW neonates with infant respiratory distress syndrome than in those without (p < 0.001). We found that in VLBW neonates carrying HSP72 (1267)GG genetic variation, which is associated with low inducibility of HSP72, the risk of ARF was increased. Therefore, VLBW neonates with (1267)GG might express less HSP72 and might be less protected against ARF.
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Abbreviations
- HSP:
-
heat shock protein
- ARF:
-
acute renal failure
- VLBW:
-
very low birth weight
- NEC:
-
necrotizing enterocolitis
- IRDS:
-
infant respiratory distress syndrome
- PDA:
-
patent ductus arteriosus
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The authors thank Mária Bernáth for technical assistance.
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Supported by OTKA Grant F032024-T34605 and by K+F (Hungarian Scientific Education) Grant 0134/2001.
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Fekete, A., Treszl, A., Tóth-Heyn, P. et al. Association between Heat Shock Protein 72 Gene Polymorphism and Acute Renal Failure in Premature Neonates. Pediatr Res 54, 452–455 (2003). https://doi.org/10.1203/01.PDR.0000083024.05819.47
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DOI: https://doi.org/10.1203/01.PDR.0000083024.05819.47
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