Effects of ACE inhibition and AT1-receptor antagonism on endothelial function and insulin sensitivity in essential hypertensive patients
Objective Disturbed endothelial function is closely associated with hyperinsulinaemia and insulin resistance in essential hypertension. The aims of this study were: 1) to evaluate whether the two alternative drugs, angiotensin-converting enzyme (ACE) inhibitors and Angiotensin II (Ang II) antagonist...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publications
2003-09-01
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| Series: | Journal of the Renin-Angiotensin-Aldosterone System |
| Online Access: | https://doi.org/10.3317/jraas.2003.032 |
| _version_ | 1797288991607750656 |
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| author | Dilek Yavuz Mehmet Koç Ahmet Toprak Ihsan Akpιnar Ayliz Velioğlu Oguzhan Deyneli Goncagül Haklar Sema Akalln |
| author_facet | Dilek Yavuz Mehmet Koç Ahmet Toprak Ihsan Akpιnar Ayliz Velioğlu Oguzhan Deyneli Goncagül Haklar Sema Akalln |
| author_sort | Dilek Yavuz |
| collection | DOAJ |
| description | Objective Disturbed endothelial function is closely associated with hyperinsulinaemia and insulin resistance in essential hypertension. The aims of this study were: 1) to evaluate whether the two alternative drugs, angiotensin-converting enzyme (ACE) inhibitors and Angiotensin II (Ang II) antagonists, had comparable effects on glucose metabolism and endothelial function. 2) to determine whether they improve endothelial dysfunction through modulating insulin resistance and oxidative stress. Study design and methods Study design and methods Essential hypertensive patients were randomised into two groups: Twelve (nine patients in final analysis) patients were given enalapril (enalapril group), and twelve (nine patients in final analysis) were given losartan (losartan group). Twelve sex- and age-matched normotensive volunteers were included as controls. Before and after six months of treatment, endothelial function, insulin sensitivity and lipid peroxidation (TBARs) and NO metabolites (NOx) were evaluated. Results Endothelial function, measured as flow mediated dilatation (FMD), was improved in both of the treatment groups (p=0.0001). Calculated insulin sensitivity index also improved in the enalapril-treated group (p=0.05) but not in the losartan-treated group, compared with baseline levels. TBARS values decreased significantly in the enalapril group compared with baseline levels (p<0.001). FMD was positively correlated with insulin sensitivity index (r=0.32, p<0.05) and NOx levels (r=0.39, p=0.01) and negatively correlated with TBARS levels (r=-0.53, p=0.0002) in hypertensive patients. Conclusion Inhibition of the renin-angiotensin system, either with ACE inhibitors or AT 1 -receptor blockers improves endothelial dysfunction. ACE inhibition has prominent effects on improving insulin sensitivity and decreasing oxidative stress in essential hypertensive patients. |
| first_indexed | 2024-03-07T18:57:38Z |
| format | Article |
| id | doaj.art-b508cc90d400455597039f00b7232dea |
| institution | Directory Open Access Journal |
| issn | 1470-3203 |
| language | English |
| last_indexed | 2024-03-07T18:57:38Z |
| publishDate | 2003-09-01 |
| publisher | SAGE Publications |
| record_format | Article |
| series | Journal of the Renin-Angiotensin-Aldosterone System |
| spelling | doaj.art-b508cc90d400455597039f00b7232dea2024-03-02T00:08:17ZengSAGE PublicationsJournal of the Renin-Angiotensin-Aldosterone System1470-32032003-09-01410.3317/jraas.2003.032Effects of ACE inhibition and AT1-receptor antagonism on endothelial function and insulin sensitivity in essential hypertensive patientsDilek YavuzMehmet KoçAhmet ToprakIhsan AkpιnarAyliz VelioğluOguzhan DeyneliGoncagül HaklarSema AkallnObjective Disturbed endothelial function is closely associated with hyperinsulinaemia and insulin resistance in essential hypertension. The aims of this study were: 1) to evaluate whether the two alternative drugs, angiotensin-converting enzyme (ACE) inhibitors and Angiotensin II (Ang II) antagonists, had comparable effects on glucose metabolism and endothelial function. 2) to determine whether they improve endothelial dysfunction through modulating insulin resistance and oxidative stress. Study design and methods Study design and methods Essential hypertensive patients were randomised into two groups: Twelve (nine patients in final analysis) patients were given enalapril (enalapril group), and twelve (nine patients in final analysis) were given losartan (losartan group). Twelve sex- and age-matched normotensive volunteers were included as controls. Before and after six months of treatment, endothelial function, insulin sensitivity and lipid peroxidation (TBARs) and NO metabolites (NOx) were evaluated. Results Endothelial function, measured as flow mediated dilatation (FMD), was improved in both of the treatment groups (p=0.0001). Calculated insulin sensitivity index also improved in the enalapril-treated group (p=0.05) but not in the losartan-treated group, compared with baseline levels. TBARS values decreased significantly in the enalapril group compared with baseline levels (p<0.001). FMD was positively correlated with insulin sensitivity index (r=0.32, p<0.05) and NOx levels (r=0.39, p=0.01) and negatively correlated with TBARS levels (r=-0.53, p=0.0002) in hypertensive patients. Conclusion Inhibition of the renin-angiotensin system, either with ACE inhibitors or AT 1 -receptor blockers improves endothelial dysfunction. ACE inhibition has prominent effects on improving insulin sensitivity and decreasing oxidative stress in essential hypertensive patients.https://doi.org/10.3317/jraas.2003.032 |
| spellingShingle | Dilek Yavuz Mehmet Koç Ahmet Toprak Ihsan Akpιnar Ayliz Velioğlu Oguzhan Deyneli Goncagül Haklar Sema Akalln Effects of ACE inhibition and AT1-receptor antagonism on endothelial function and insulin sensitivity in essential hypertensive patients Journal of the Renin-Angiotensin-Aldosterone System |
| title | Effects of ACE inhibition and AT1-receptor antagonism on endothelial function and insulin sensitivity in essential hypertensive patients |
| title_full | Effects of ACE inhibition and AT1-receptor antagonism on endothelial function and insulin sensitivity in essential hypertensive patients |
| title_fullStr | Effects of ACE inhibition and AT1-receptor antagonism on endothelial function and insulin sensitivity in essential hypertensive patients |
| title_full_unstemmed | Effects of ACE inhibition and AT1-receptor antagonism on endothelial function and insulin sensitivity in essential hypertensive patients |
| title_short | Effects of ACE inhibition and AT1-receptor antagonism on endothelial function and insulin sensitivity in essential hypertensive patients |
| title_sort | effects of ace inhibition and at1 receptor antagonism on endothelial function and insulin sensitivity in essential hypertensive patients |
| url | https://doi.org/10.3317/jraas.2003.032 |
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