Study of hydronephrosis and renal function reversibility on different development stages of rats that underwent unilateral ureteral obstruction, followed by its release through pyelostomy

ABSTRACT Purpose: To verify the differences in the reversibility of renal function and damage in rats of different ages with unilateral ureteral obstruction (UUO). Methods: Sixty rats were divided into three different groups, newborns, young, and adults. Twenty-one were sham operated. After UUO, the animals were subdivided into four groups: obstruction (two weeks and sacrifice O2); UUO two weeks, obstruction release for two weeks and sacrifice (R2); UUO for four weeks and sacrifice (O4); and UUO for four weeks, obstruction release for two weeks and sacrifice (R4). Urine was collected for creatinine, urea, total protein, and albumin dosages, and kidneys for morphological studies. Results: Younger rats presented more extensive destruction of renal parenchyma, with some remaining normal tissue healthier in comparison to older rats. The protein excretion by older rats was not different between the groups obstructed for different periods, albuminuria was progressively higher in rats obstructed for longer periods, and after relief of obstruction, there was no difference between newborn rats obstructed for different periods. The younger pyelostomized rats presented higher albumin excretion. Creatinine excretion was worsened in rats after obstruction. Conclusion: Shorter obstruction periods lead to better prognosis, and younger rats showed better recovery after relief of obstruction than older ones.

• Publication year

  2025

• Venue

  Acta Cirurgica Brasileira

• Publication date

  2025-11-10

• Fields of study

  Medicine

• Identifiers
  DOI 10.1590/acb408325PMID 41221901PMCID 12600007
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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