Ultrastructural Changes of the Right Ventricular Myocytes in Pulmonary Arterial Hypertension.

Journal of the American Heart Association
Nataliia V ShultsYuichiro J Suzuki

Abstract

Background Pulmonary arterial hypertension ( PAH ) is a serious disease without cure. Elevated pulmonary vascular resistance puts strain on the right ventricle ( RV ) and patients die of RV failure. Subjecting Sprague-Dawley rats to SU 5416 injection and hypoxia promotes severe PAH with pulmonary vascular lesions similar to human disease and has been well utilized to investigate pulmonary vascular pathology. However, despite exhibiting severe RV fibrosis, these rats do not die. Recently, subjecting Fischer ( CDF ) rats to the same treatment to promote PAH was found to result in mortality. Thus, the present study performed detailed morphological characterizations of Fischer rats with PAH . Methods and Results Rats were subjected to SU 5416 injection and hypoxia for 3 weeks, followed by maintenance in normoxia. More than 90% of animals died within 6 weeks of the SU 5416 injection. Necropsy revealed the accumulation of fluid in the chest cavity, right ventricular hypertrophy and dilatation, hepatomegaly, and other indications of congestive heart failure. Time course studies demonstrated the progressive thickening of pulmonary arteries with the formation of concentric lamellae and plexiform lesions as well as RV fibrosis in PAH rat...Continue Reading

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Citations

Jun 20, 2019·Antioxidants·Vladyslava RybkaNataliia V Shults
Apr 2, 2020·International Journal of Molecular Sciences·Jake J WenRavi S Radhakrishnan
Aug 23, 2019·Antioxidants·Yuichiro J Suzuki, Nataliia V Shults
Jul 10, 2021·Oxidative Medicine and Cellular Longevity·Judith Bernal-RamírezGerardo García-Rivas

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Methods Mentioned

BETA
transmission electron microscopy
transmission electron tomography

Software Mentioned

Fiji
GraphPad Prism
TIA

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