- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT00407862
Telmisartan and Losartan in Hypertensive IGT
Telmisartan vs. Losartan in Hypertensive Patients With Impaired Glucose Tolerance: A Comparison of Their Antihypertensive, Metabolic, and Vascular Effects
Inhibition of RAS delays onset of diabetes in clinical studies. Preliminary evidence suggests that telmisartan may have unique metabolic properties compared to other ARB due to activation of PPARγ.
This should be tested in comparison with an ARB that is metabolically neutral in already published studies.
H0: Telmisartan is not different from Losartan with respect to metabolic and vascular effects.
H1: Telmisartan is different from Losartan with respect to metabolic and vascular effects.
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
Background: Both, ACE-inhibitors as well as angiotensin-II-type-1 (AT1) receptor antagonists seem to reduce the development of type-II diabetes in patients with hypertension and/or high vascular risk (1-3). The major drawback of that evidence is that it derives from post-hoc analyses in studies with rather poor metabolic phenotypisation of the populations included. Additionally, all that evidence is based on measurements of fasting plasma glucose.
In subjects with impaired glucose tolerance (IGT), insulin resistance and dysfunction of pancreatic beta-cells (in variable contribution) have already established increased postprandial hyperglycemia with a consecutively increased cardiovascular risk (4, 5). In addition they have a considerable risk for future development of manifest type-II diabetes in the range of 3-6 % within a year (6, 7). In such patients prevention of diabetes may also result in cardiovascular prevention. As subjects with IGT often exhibit a more or less pronounced metabolic syndrome, hypertension is a frequently found comorbidity and vice versa IGT is frequent in hypertensive patients suggesting a possible common soil of the two diseases (8).
Given these evidences, hypertensive subjects with IGT are a very suitable target population to study metabolic and vascular effects of an angiotensin-II-type-1-receptor antagonist.
Finally, it has to be acknowledged that insulin resistance needs to be seen in the context of the proinflammatory changes of the metabolic syndrome, the endothelial dysfunction associated and the possibly central role of the adipocyte (Fig. 1). Within that context, the hypothesis was put forward that blockade of the angiotensin system might prevent type-II diabetes via effects on fat cells (9).
Rationale: The effects of different angiotensin-II-type-1-receptor antagonists on insulin sensitivity have been investigated in various studies with different, either positive (10) or negative (11, 12) results but no in-depht investigations into detailed metabolic and vascular effects have been performed.
Telmisartan is an angiotensin-II-type-1-receptor antagonist that very recently has been described to possess the specific properties of a partial activator of PPARγ (13). This effect is not found for other comparable compunds such as losartan. Genes of whom the expression is under control of that receptor are centrally involved into the pathology of the metabolic syndrome as outlined above and activation of that receptor results in improved insulin sensitivity, ameliorated endothelial dysfunction, reduced inflammation and potentially preserved beta-cell function (for review see (14)). Therefore, telmisartan is a candidate that might possess very specific beneficial properties in addition to its antihypertensive effects.
Objective: To compare the metabolic and vascular effects of telmisartan and metoprolol in hypertensive patients with IGT.
Type d'étude
Inscription
Phase
- Phase 4
Contacts et emplacements
Lieux d'étude
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Graz, L'Autriche, 8036
- Medical University of Graz
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Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
Inclusion Criteria:
- IGT according the criteria of the WHO
- standardised office blood pressure > 140/90 mmHG or treated hypertension
- 40 - 75 years of age
- signed informed consent
Exclusion Criteria:
- known hypersensitivity towards telmisartan or losartan
- concommitant treatment with ACE-inhibitors
- BMI > 35 kg/m2
- inability to perform self-control of blood pressure
- acute coronary syndrome or cerebrovascular event within the last 3 months
- Revascularisation within the last 3 months
- heart failure > NYHA 2
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Traitement
- Répartition: Randomisé
- Modèle interventionnel: Affectation croisée
- Masquage: Double
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
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HOMA index
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ISI
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FMD
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Blood pressure surge in the morning
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Collaborateurs et enquêteurs
Parrainer
Les enquêteurs
- Chercheur principal: Thomas C. Wascher, MD, Medical University of Graz
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude
Achèvement de l'étude
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Estimation)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Estimation)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
- Troubles du métabolisme du glucose
- Maladies métaboliques
- Hyperglycémie
- Intolérance au glucose
- Mécanismes moléculaires de l'action pharmacologique
- Agents anti-arythmie
- Agents antihypertenseurs
- Bloqueurs des récepteurs de l'angiotensine II de type 1
- Antagonistes des récepteurs de l'angiotensine
- Losartan
- Telmisartan
Autres numéros d'identification d'étude
- TCW-02-04
Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .
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