- ICH GCP
- US Clinical Trials Registry
- Klinisk utprøving NCT02244736
Vascular Markers During OGTT in Diabetics and First-degree Relatives
Changes of the Endothelial Glycocalyx, the Elastic Properties of the Arteries and the Coronary Flow Reserve (CFR) During Oral Glucose Tolerance Test in Patients With New Onset Diabetes Mellitus and First-degree Relatives
Studieoversikt
Status
Forhold
Detaljert beskrivelse
The investigators plan to examine 90 subjects without known diabetes a standard 75-gr oral glucose tolerance test (OGTT) will be performed. [30 first degree relatives of diabetics with normal OGTT (relatives), 30 with normal OGTT and no family history of diabetes (normals), and 30 with abnormal OGTT (diabetics) matched for age and sex].
Plasma glucose and serum insulin levels will be measured in venous blood collected at 0, 30, 60, 90 and 120min after glucose loading. At the same time intervals, the investigators will measure:
- the carotid to femoral pulse wave velocity (PWVc) using the Complior apparatus
- the aortic pulse wave velocity (PWVa), central systolic blood pressure (cSBP) and augmentation index (AI) using an oscillometric method (Arteriograph,TensioMed) as markers of arterial stiffness and wave reflections
- the coronary flow reserve (CFR) at baseline and after adenosine infusion (140 μg × kg-1 × min-1) for 3 minutes to assess coronary vasomotor function
- the perfusion boundary region (PBR- micrometers) of the sublingual arterial microvessels (ranged from 5-25 micrometers) using Sideview Darkfield imaging (Microscan, Glycocheck). Increased PBR is considered an accurate non invasive index of reduced endothelial glycocalyx thickness.
In addition, the investigators will measure free fatty acids, triglycerides, glycerol, C reactive protein (CRP), transforming growth factor-b (TGF-b), Lipoprotein-Associated Phospholipase A2, (LP-LPA2), tumor necrosis factor (TNF-a), interleukin 6 (IL6) and interleukin 10 (IL10) propeptide of type I procollagen, (PIP), propeptide of procollagen type III (PIIINP), matrix metallopeptidases 9 and 2 (MMP 9 and 2), macrophage-colony stimulating factor ( MCSF).
The investigators will measure insulin resistance a) after fasting, using homeostatic model assessment (HOMA) and hepatic insulin sensitivity (HIS) b) during oral glucose tolerance test (OGTT) using Matsuda index and insulin sensitivity index (ISI). The investigators will categorize patients in those with normal (<140 mg/dl at 120 min) and those with abnormal OGTT (>200mg/dl at 120min).
Studietype
Registrering (Faktiske)
Kontakter og plasseringer
Studiesteder
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Attiki
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Athens, Attiki, Hellas, 12462
- ''Attikon'' University General Hospital
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Deltakelseskriterier
Kvalifikasjonskriterier
Alder som er kvalifisert for studier
Tar imot friske frivillige
Kjønn som er kvalifisert for studier
Prøvetakingsmetode
Studiepopulasjon
Beskrivelse
Inclusion Criteria:
- subjects without known diabetes
- first degree relatives of diabetics
Exclusion Criteria:
- coronary or valvular heart disease
- congestive heart failure
- peripheral vascular disease
- liver or kidney failure
- history of alcohol or drug abuse
Studieplan
Hvordan er studiet utformet?
Designdetaljer
Kohorter og intervensjoner
Gruppe / Kohort |
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Controls
Subjects with no family history of diabetes mellitus and normal OGTT
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Relatives
First-degree relatives of patients with diabetes mellitus and normal OGTT
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Diabetics
Subjects with abnormal OGTT
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Hva måler studien?
Primære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
---|---|---|
Differences of vascular function at baseline and during OGTT among the 3 groups.
Tidsramme: Baseline, 30 min, 60 min, 90 min, and 120 min during OGTT.
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Differences of pulse wave velocity, augmentation index and central aortic blood pressure at baseline and during OGTT among the 3 groups.
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Baseline, 30 min, 60 min, 90 min, and 120 min during OGTT.
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Differences of endothelial function at baseline and during OGTT among the 3 groups.
Tidsramme: Baseline, 30 min, 60 min, 90 min, and 120 min during OGTT.
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Differences of coronary flow reserve and endothelial glycocalyx thickness at baseline and during OGTT among the 3 groups.
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Baseline, 30 min, 60 min, 90 min, and 120 min during OGTT.
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Sekundære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
---|---|---|
Insulin resistance and arterial stiffness
Tidsramme: Baseline, 30 min, 60 min, 90 min, and 120 min during OGTT.
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Association of insulin resistance with changes of pulse wave velocity, augmentation index and central aortic blood pressure during OGTT
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Baseline, 30 min, 60 min, 90 min, and 120 min during OGTT.
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Insulin resistance and endothelial function
Tidsramme: Baseline, 30 min, 60 min, 90 min,120 min of OGTT
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Association of insulin resistance with changes of coronary flow reserve and endothelial glycocalyx during OGTT
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Baseline, 30 min, 60 min, 90 min,120 min of OGTT
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Samarbeidspartnere og etterforskere
Sponsor
Etterforskere
- Hovedetterforsker: Vaia Lambadiari, MD, 2nd Department of Internal Medicine , University of Athens, Greece
- Hovedetterforsker: Charalambos Koukoulis, MD, 2nd Cardiology Department, University of Athens, Greece
- Hovedetterforsker: Maria Varoudi, MD, 2nd Cardiology Department, University of Athens, Greece
- Hovedetterforsker: Vlasios Tritakis, MD, 2nd Cardiology Department, University of Athens, Greece
- Hovedetterforsker: Helen Triantafyllidi, MD, 2nd Cardiology Department, University of Athens, Greece
Publikasjoner og nyttige lenker
Studierekorddatoer
Studer hoveddatoer
Studiestart
Primær fullføring (Faktiske)
Studiet fullført (Faktiske)
Datoer for studieregistrering
Først innsendt
Først innsendt som oppfylte QC-kriteriene
Først lagt ut (Anslag)
Oppdateringer av studieposter
Sist oppdatering lagt ut (Faktiske)
Siste oppdatering sendt inn som oppfylte QC-kriteriene
Sist bekreftet
Mer informasjon
Begreper knyttet til denne studien
Ytterligere relevante MeSH-vilkår
Andre studie-ID-numre
- K-DM-ATTIKON
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