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Hypothermia cannot ameliorate renal fibrosis after asphyxia in the newborn piglet

若林 誉幸 香川大学 DOI:10.1111/ped.14961

2021.12.27

概要

Background: The effects of therapeutic hypothermia (TH) on renal function are not widely reported, especially in longer-term animal models. The hypothesis of this study was that TH of the kidneys of hypoxic-ischemic newborn piglets would reduce pathological renal fibrosis.
Methods: Twenty-five newborn piglets obtained within 24 h of birth were classified into a Control group (n = 5), hypoxic insult with normothermia (HI-NT) group (n = 12), and hypoxic insult with TH (HI-TH) group (33.5°C ± 0.5°C for 24 h; n = 8). Five days after the insult, all piglets were sacrificed under deep anesthesia by isoflurane inhalation. The kidneys were perfused with phosphate-buffered paraformaldehyde and immersed in formalin buffer. Territory fibrosis was studied and scored in the renal medulla using Azan staining.
Results: Fibrosis area scores (mean ± standard deviation) based on Azan staining were 1.00 ± 0.46 in the Control group, 2.85 ± 0.93 in the HI-NT group, and 3.58 ± 1.14 in the HI-TH group. The fibrosis area of the HI-NT and HI-TH groups was larger than that of the Control. The HI-NT and HI-TH groups were not statistically different.
Conclusion: Renal fibrosis is affected by perinatal asphyxia and cannot be prevented by TH, based on histopathological findings.

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参考文献

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