Different Structural Alterations in Individual Conduit Arteries of SHRs Compared to Wistar Rats From the Prehypertensive Period to Late Adulthood
| Autor: | S Cacanyiova, Frantisek Kristek, M Drobna |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
medicine.medical_specialty
Physiology Aorta Thoracic Blood Pressure 030204 cardiovascular system & hematology Iliac Artery Prehypertension Extracellular matrix 03 medical and health sciences 0302 clinical medicine Rats Inbred SHR Internal medicine medicine.artery medicine Animals Plethysmograph Myocyte Thoracic aorta cardiovascular diseases Rats Wistar Chemistry Age Factors General Medicine Arterial tree Rats Carotid Arteries Endocrinology Blood pressure Hypertension Tunica Intima Perfusion 030217 neurology & neurosurgery |
| Zdroj: | Physiological Research. :769-780 |
| ISSN: | 1802-9973 0862-8408 |
| Popis: | Structural changes of thoracic aorta (TA), carotid (CA) and iliac artery (IA) were assessed in Wistar and spontaneously hypertensive rats (SHR) aged 3, 17, and 52 weeks. Systolic blood pressure (sBP) was measured by plethysmography weekly. After perfusion fixation the arteries were processed for electron microscopy. The wall thickness (WT), cross-sectional area (CSA), inner diameter (ID), and WT/ID in all arteries and volume densities of endothelial cells (ECs), muscle cells (SMCs), and extracellular matrix (ECM) in TA were measured and their CSAs were calculated. In 3-week-old SHR compared to Wistar rats, sBP did not differ; in the TA, all parameters (WT, CSA, ID, WT/ID, CSA of SMCs, CSA of ECs, and CSA of ECM) were decreased; in CA, WT and CSA did not differ, ID was decreased, and WT/ID was increased; in IA, WT, CSA, and ID were increased. In 17- and 52-week-old SHRs, sBP and all parameters in all arteries were increased, only ID in IE in 52-week-old SHRs and CSA of ECs in the TA in 17-week-old SHRs did not change. Disproportionality between BP increase and structural alterations during ontogeny in SHR could reflect the flexibility of the arterial tree to the different needs of supplied areas. |
| Databáze: | OpenAIRE |
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