- ICH GCP
- Registr klinických studií v USA
- Klinická studie NCT07715890
Plasma Lipids-dependent Vitamin E Metabolism During Dynamic Hyperlipidemia
Study Description:
A controlled interventional study of effects of postprandial hypertriglyceridemia from three consecutive high-fat vitamin E-stripped meals on the dynamics of plasma vitamin E concentrations in subjects with baseline normo- and hyperlipidemia, to explore the concept of vitamin E sequestration by fats in plasma.
Objectives:
Primary Objective: Compare effects of postprandial hypertriglyceridemia (PHTG) on plasma/lipoprotein vitamin E dynamics in subjects between baseline normo- and hyperlipidemia.
Secondary Objectives: Compare effects of postprandial hypertriglyceridemia (PHTG) on other fat-soluble vitamins (gamma-tocopherol, phylloquinone [K1]; menaquinone [K2]; 25-OH vitamin D; retinol [A]) and related vitamers (beta-carotene, lycopene lutein/zeaxanthin) between subjects with baseline normo- and hyperlipidemia.
Tertiary/Exploratory Objectives:
- Compare effects of individual high-fat meals on the dynamics of vitamin E, gamma-tocopherol, phylloquinone [K1], menaquinone [K2], 25-OH vitamin D, retinol [A], and other carotenoids between subjects with baseline normo- and hyperlipidemia.
- Compare effects of postprandial hypertriglyceridemia (PHTG) and resultant vitamin E dynamics on: red blood cell (RBC) membrane deformability, fluidity, and oxygen exchange capacity (p50); RBC vitamin E, plasma vitamin C, plasma dehydroascorbic acid; fasting glucose and insulin; oxidized LDL, coenzyme Q10, and plasma adipokine profile between subjects with baseline normo- and hyperlipidemia;
- Explore effects of postprandial hypertriglyceridemia on small RNAs including microRNAs, tRNAs, and PIWI-interacting RNAs.
- Explore the influence of genetic variance on the metabolism of vitamin E and other fat-soluble vitamins and related vitamers in subjects with baseline normo- and hyperlipidemia.
Endpoints:
Primary Endpoint: AUC (Area Under the Curve) of vitamin E plasma from hour 1 to hour 23, by cohort.
Secondary Endpoints: AUC of gamma-tocopherol, phylloquinone [K1], menaquinone [K2], 25-OH vitamin D and retinol [A] from hour 1 to hour 23, by cohort.
Tertiary/Exploratory Endpoints:
- Between the timepoints that reflect consuming 3 high-fat meals, AUC of vitamin E, gamma-tocopherol, phylloquinone [K1], menaquinone [K2], 25-OH vitamin D, retinol [A], and other carotenoids will be separately calculated for each participant.
- Over the course of inpatient visit, RBC membrane deformability/fluidity, p50, RBC vitamin E, plasma vitamin C, plasma dehydroascorbic acid, blood glucose, insulin, c-peptide, oxidized LDL, coenzyme Q10 and serum adipokine profiles in each subject.
- Over the course of inpatient visit, small RNAs including microRNAs, tRNAs, and PIWI-interacting RNAs.
- Genetic variance (single nucleotide polymorphisms, SNPs)- dependent change in lipid-soluble vitamin dynamics over the course of inpatient visit in each subject.
Přehled studie
Postavení
Podmínky
Intervence / Léčba
Detailní popis
Study Description:
A controlled interventional study of effects of postprandial hypertriglyceridemia from three consecutive high-fat vitamin E-stripped meals on the dynamics of plasma vitamin E concentrations in subjects with baseline normo- and hyperlipidemia, to explore the concept of vitamin E sequestration by fats in plasma.
Objectives:
Primary Objective: Compare effects of postprandial hypertriglyceridemia (PHTG) on plasma/lipoprotein vitamin E dynamics in subjects between baseline normo- and hyperlipidemia.
Secondary Objectives: Compare effects of postprandial hypertriglyceridemia (PHTG) on other fat-soluble vitamins (gamma-tocopherol, phylloquinone [K1]; menaquinone [K2]; 25-OH vitamin D; retinol [A]) and related vitamers (beta-carotene, lycopene lutein/zeaxanthin) between subjects with baseline normo- and hyperlipidemia.
Tertiary/Exploratory Objectives:
- Compare effects of individual high-fat meals on the dynamics of vitamin E, gamma-tocopherol, phylloquinone [K1], menaquinone [K2], 25-OH vitamin D, retinol [A], and other carotenoids between subjects with baseline normo- and hyperlipidemia.
- Compare effects of postprandial hypertriglyceridemia (PHTG) and resultant vitamin E dynamics on: red blood cell (RBC) membrane deformability, fluidity, and oxygen exchange capacity (p50); RBC vitamin E, plasma vitamin C, plasma dehydroascorbic acid; fasting glucose and insulin; oxidized LDL, coenzyme Q10, and plasma adipokine profile between subjects with baseline normo- and hyperlipidemia;
- Explore effects of postprandial hypertriglyceridemia on small RNAs including microRNAs, tRNAs, and PIWI-interacting RNAs.
- Explore the influence of genetic variance on the metabolism of vitamin E and other fat-soluble vitamins and related vitamers in subjects with baseline normo- and hyperlipidemia.
Endpoints:
Primary Endpoint: AUC (Area Under the Curve) of vitamin E plasma from hour 1 to hour 23, by cohort.
Secondary Endpoints: AUC of gamma-tocopherol, phylloquinone [K1], menaquinone [K2], 25-OH vitamin D and retinol [A] from hour 1 to hour 23, by cohort.
Tertiary/Exploratory Endpoints:
- Between the timepoints that reflect consuming 3 high-fat meals, AUC of vitamin E, gamma-tocopherol, phylloquinone [K1], menaquinone [K2], 25-OH vitamin D, retinol [A], and other carotenoids will be separately calculated for each participant.
- Over the course of inpatient visit, RBC membrane deformability/fluidity, p50, RBC vitamin E, plasma vitamin C, plasma dehydroascorbic acid, blood glucose, insulin, c-peptide, oxidized LDL, coenzyme Q10 and serum adipokine profiles in each subject.
- Over the course of inpatient visit, small RNAs including microRNAs, tRNAs, and PIWI-interacting RNAs.
- Genetic variance (single nucleotide polymorphisms, SNPs)- dependent change in lipid-soluble vitamin dynamics over the course of inpatient visit in each subject.
Typ studie
Zápis (Odhadovaný)
Fáze
- Nelze použít
Kontakty a umístění
Studijní kontakt
- Jméno: Robert D Shamburek, M.D.
- Telefonní číslo: (301) 496-3460
- E-mail: bobs@mail.nih.gov
Studijní záloha kontaktů
- Jméno: Katherine C Roskom, R.N.
- Telefonní číslo: (301) 451-7094
- E-mail: katherine.roskom@nih.gov
Studijní místa
-
-
Maryland
-
Bethesda, Maryland, Spojené státy, 20892
- National Institutes of Health Clinical Center
-
Kontakt:
- NIH Clinical Center Office of Patient Recruitment (OPR)
- Telefonní číslo: TTY dial 711 (800) 411-1222
- E-mail: ccopr@nih.gov
-
Kontakt:
- Robert Shamburek, M.D.
- Telefonní číslo: 301-496-3460
- E-mail: bobs@mail.nih.gov
-
-
Kritéria účasti
Kritéria způsobilosti
Věk způsobilý ke studiu
- Dospělý
- Starší dospělý
Přijímá zdravé dobrovolníky
Popis
- INCLUSION CRITERIA
Cohort 1
- Males and females between the ages of 18 to 65
- BMI 18.5 - 26.9 kg/m^2
- Subject understands the protocol and provides written, informed consent in addition to a willingness to comply with specified follow-up instructions and evaluations
- Normotensive, not on medications for hypertension
- Not on glucose-lowering or lipid-lowing medications
- Screening labs with baseline HbA1c <5.7%, baseline fasting triglyceride < 150 mg/dL and LDL <100 mg/dL
- Liver fat <2%
Cohort 2
- Males and females between the ages of 18 to 65
- BMI >26 kg/m^2 and <36 kg/m^2
- Subject understands the protocol and provides written, informed consent in addition to a willingness to comply with specified follow-up instructions and evaluations.
- Screening labs with baseline HbA1c <= 7.5%, agree to be off or stop oral glucose-lowering medications (metformin), baseline fasting triglyceride < 500 mg/dL and LDL <190 mg/dL, agree to be off or stop oral lipid-lowing medications for 4-10 weeks prior to the inpatient visit.
- Liver fat <2%
EXCLUSION CRITERIA
- For women: pregnancy or currently breastfeeding
- Subjects <18-year-old. This age group has a broad spectrum of hormonal profiles, due to development and puberty, which significantly increases the heterogenicity of the study subjects.
- Subjects >65-year-old. This age group has significantly increased risk of cardiovascular diseases. To minimize the risk from temporarily suspending lipid- and glucose-lowering medications and stress from serial blood draws, we exclude these individuals.
- Heavy alcohol user (males with >2 drinks per day or >14 drinks per week; female with >1 drinks per day or >7 drinks per week)
- Current smoker, or former smoker who quit smoking <15 years ago
- Subjects with weight changes greater than 20% baseline body weight over the past 3 months
- Subjects with lactose intolerance unwilling to take lactase
- Subjects with type 1 diabetes
- Subjects with hemoglobin <11 g/dL or hematocrit <33%
- Subjects with abnormal liver function test results
- Subjects with liver fat >= 2% on abdominal MRI
- Subjects with a history of pancreatitis, diabetes ketoacidosis, hyperosmolar hyperglycemic state, advanced atherosclerosis, cardiovascular diseases, kidney diseases, or liver diseases
- Subjects with fat malabsorption including: history of gastrointestinal surgery, pancreatic insufficiency, inflammatory bowel disease, celiac disease, moderate-to-severe irritable bowel syndrome, and pathologic mutations impacting lipoprotein metabolism
- Subjects on glucocorticoids >1 week (not including topical glucocorticoids)
- Subjects with HIV
- Subjects with uncontrolled psychiatric and/or behavioral disorders
- Subjects taking diabetes medications other than metformin
- Anticipated surgery during the study period
- Subjects with severe medication-resistant claustrophobia
- Subjects who are unwilling to stop medications, vitamins and/or dietary supplements that investigators have requested to be held
- Subjects participating in any other clinical study without informing investigators
- Any other reason or clinical condition that the investigators judge would interfere with study participation and/or be unsafe for a participant or staff member
Studijní plán
Jak je studie koncipována?
Detaily designu
- Primární účel: Základní věda
- Přidělení: Nerandomizované
- Intervenční model: Paralelní přiřazení
- Maskování: Žádné (otevřený štítek)
Zbraně a zásahy
Skupina účastníků / Arm |
Intervence / Léčba |
|---|---|
|
Aktivní komparátor: Healthy subjects
Three consecutive high-fat vitamin E-stripped meals
|
Three consecutive high-fat vitamin E-stripped meals
|
|
Experimentální: Subjects with hyperlipidemia
Three consecutive high-fat vitamin E-stripped meals
|
Three consecutive high-fat vitamin E-stripped meals
|
Co je měření studie?
Primární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
|
AUC (Area Under the Curve) of vitamin E plasma from hour 1 to hour 23 by cohort.
Časové okno: From hour 1 to hour 23
|
Compare the effects of postprandial hypertriglyceridemia on plasma vitamin E dynamics in subjects between baseline normo- and hyperlipidemia.
|
From hour 1 to hour 23
|
Sekundární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
|
AUC of gamma-tocopherol, phylloquinone [K1]; menaquinone [K2]; 25-OH vitamin D; retinol [A] from hour 1 to hour 23 by cohort.
Časové okno: From hour 1 to hour 23
|
Compare the effects of postprandial hypertriglyceridemia on other fat-soluble vitamins (gamma-tocopherol, phylloquinone [K1]; menaquinone [K2]; 25-OH vitamin D; retinol [A]) and related vitamers (beta-carotene, lycopene lutein/zeaxanthin) in subjects between baseline normo- and hyperlipidemia.
|
From hour 1 to hour 23
|
Spolupracovníci a vyšetřovatelé
Vyšetřovatelé
- Vrchní vyšetřovatel: Robert D Shamburek, M.D., National Heart, Lung, and Blood Institute (NHLBI)
Publikace a užitečné odkazy
Užitečné odkazy
Termíny studijních záznamů
Hlavní termíny studia
Začátek studia (Odhadovaný)
Primární dokončení (Odhadovaný)
Dokončení studie (Odhadovaný)
Termíny zápisu do studia
První předloženo
První předloženo, které splnilo kritéria kontroly kvality
První zveřejněno (Aktuální)
Aktualizace studijních záznamů
Poslední zveřejněná aktualizace (Aktuální)
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Naposledy ověřeno
Více informací
Termíny související s touto studií
Klíčová slova
Další relevantní podmínky MeSH
Další identifikační čísla studie
- 10002623
- 002623-H
Plán pro data jednotlivých účastníků (IPD)
Plánujete sdílet data jednotlivých účastníků (IPD)?
Popis plánu IPD
Časový rámec sdílení IPD
Kritéria přístupu pro sdílení IPD
Typ podpůrných informací pro sdílení IPD
- PROTOKOL STUDY
- ICF
Informace o lécích a zařízeních, studijní dokumenty
Studuje lékový produkt regulovaný americkým FDA
Studuje produkt zařízení regulovaný americkým úřadem FDA
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