1. Female sex protects against renal edema, but not lung edema, in mice with partial deletion of the endothelial barrier regulator Tie2 compared to male sex.
- Author
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Anoek L I van Leeuwen, Elise Beijer, Roselique Ibelings, Nicole A M Dekker, Marjolein R A van der Steen, Joris J T H Roelofs, Matijs van Meurs, Grietje Molema, and Charissa E van den Brom
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Medicine ,Science - Abstract
BackgroundThe endothelial angiopoietin/Tie2 system is an important regulator of endothelial permeability and targeting Tie2 reduces hemorrhagic shock-induced organ edema in males. However, sexual dimorphism of the endothelium has not been taken into account. This study investigated whether there are sex-related differences in the endothelial angiopoietin/Tie2 system and edema formation.MethodsAdult male and female heterozygous Tie2 knockout mice (Tie2+/-) and wild-type controls (Tie2+/+) were included (n = 9 per group). Renal and pulmonary injury were determined by wet/dry weight ratio and H&E staining of tissue sections. Protein levels were studied in plasma by ELISA and pulmonary and renal mRNA expression levels by RT-qPCR.ResultsIn Tie2+/+ mice, females had higher circulating angiopoietin-2 (138%, pConclusionFemale sex seems to protect against renal, but not pulmonary edema in heterozygous Tie2 knock-out mice. This could not be explained by sex dimorphism in the endothelial angiopoietin/Tie2 system.
- Published
- 2023
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