Different expression of renin-angiotensin system components in hearts of normotensive and hypertensive rats

Title:

Different expression of renin-angiotensin system components in hearts of normotensive and hypertensive rats

Creator:

Dana Jurkovičová, Zdena Dobešová, Kuneš, O., and Křižanová, O.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:abd5de9f-a34b-4ab3-8f35-24823843061a
uuid:abd5de9f-a34b-4ab3-8f35-24823843061a
issn:0862-8408

Subject:

Fyziologie člověka a srovnávací fyziologie, srdce, genová exprese, hypertenze, gene expression, heart, hypertension, renin-angiotensin system, development, 14, and 612

Type:

article, články, model:article, and TEXT

Format:

print, bez média, and svazek

Description:

Tissue renin-angiotensin systems are known to behave differently from the circulating renin-angiotensin system (RAS). It has already been proposed that not only the circulating RAS, but also RAS localized in the cardiac tissue plays an important role in the heart failure. The objective of this study was to compare the gene expression of individual components of the renin-angiotensin system in hearts of normotensive and hypertensive rats. Two genetically hypertensive rat strains - spontaneously hypertensive rats (SHR) and hereditary hypertriglyceridemic rats (HTG) - were compared with Wistar-Kyoto (WKY) and Lewis (LEW) normotensive controls. In addition, developmental changes in gene expression of individual components of cardiac RAS were studied in 20-day-old fetuses, 2-day-old newborns and 3-month-old HTG and LEW rats. In our study, the angiotensinogen gene expression did not differ either among adult normotensive and hypertensive strains, or during development. In contrast, the renin gene expression was significantly increased in hearts of hypertensive compared to normotensive rats. Moreover, a 5-fold increase of renin mRNA was observed in hearts of HTG rats between day 2 and the third month of age. There was also an age-dependent increase of ACE gene expression in both HTG and LEW rats which was substantially delayed in HTG hearts. In conclusion, the results of our study suggest that overexpression of the cardiac renin gene in hypertensive strains could participate in the structural and functional changes of the heart during the development of hypertension., D. Jurkovičová, Z. Dobešová, J. Kuneš, O. Križanová., and Obsahuje bibliografii

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Physiological research | 2001 Volume:50 | Number:1

Harvested from:

CDK

Metadata only:

false