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Markers and Mechanisms of Vascular Disease in Type II Diabetes

21. května 2014 aktualizováno: US Department of Veterans Affairs

CSP #465D - Markers And Mechanisms of Vascular Disease in Type II Diabetes

OBJECTIVES: Vascular Disease is the leading cause of complications and death in patients with diabetes. Risk markers and underlying mechanisms have not been fully elucidated, and may differ from those in non-diabetic individuals. The unifying theme for the Program Project is that hyperglycemia and insulin resistance alter a number of biological processes which interact in vicious cycles to accelerate atherogenesis and are consequently major underlying risk factors for vascular disease. The overall objectives are to define these unique processes and to elucidate underlying biochemical, metabolic, and genetic determinants of vascular disease complications in diabetes.

RESEARCH PLAN: Over the past 4 years, we have collaborated with the DCCT/EDIC Study Group, and have made novel observations regarding vascular disease pathogenesis in Type 1 Diabetes. This work has focused our studies on specific pathogenic processes. We will now study a Type 2 Diabetes cohort from the VA Cooperative Study, "Glycemic Control and the Complications of Diabetes, Type 2", with high vascular disease event rates. These collaborations provide a unique opportunity to address the pathogenesis of accelerated atherogenesis in the two main types of diabetes, and will greatly augment the scientific knowledge that will be gained in the conduct of these world-class prospective trials.

METHODS: The Program Project has 4 projects and 3 cores. Project 1 will assess lipoproteins, glycoxidative stress, and inflammation as risk factors in studies involving Type 2 Diabetes patients and cultured cell systems. Based on preliminary data from our initial studies Type 1 patients, changes in the NMR lipoprotein subclass profile will be emphasized.

Project 2 will elucidate interactions between inflammation, modifications of lipoproteins, and autoimmunity in vascular disease risk. These novel concepts are also based upon exciting preliminary data pertaining to LDL-antibody complexes.

Project 3 will pursue interesting preliminary data and define the role of the kallikrein-kinin system in vascular disease complications, with effects on mitogenesis and matrix production.

Project 4 will assess the role of the Insulin Resistance Syndrome and novel factors secreted from adipocytes in the pathophysiology of biochemical risk factors and cardiovascular complications.

Cores include an Administrative Core, a Biostatistics and Epidemiology Core which will link with the trials data coordinating centers, and Molecular and Statistical Genetics Core. Investigators will work in close collaboration with the VA Executive Committee, Study Centers, the Hines Coordinating Center, and some of the other ancillary studies. All data analysis involving clinical outcomes will be performed at the Hines Coordinating Center.

There is true synergism among the projects at both scientific and logistical levels. The Program Project design allows for interactions among multidisciplinary investigators studying the same cohort, which will define how multiple pathological processes interact at the level of the arterial wall to promote atherosclerosis.

Přehled studie

Postavení

Dokončeno

Podmínky

Intervence / Léčba

Detailní popis

Primary Hypothesis:

Secondary Hypotheses:

Primary Outcomes:

Study Abstract:

OBJECTIVES: Vascular Disease is the leading cause of complications and death in patients with diabetes. Risk markers and underlying mechanisms have not been fully elucidated, and may differ from those in non-diabetic individuals. The unifying theme for the Program Project is that hyperglycemia and insulin resistance alter a number of biological processes which interact in vicious cycles to accelerate atherogenesis and are consequently major underlying risk factors for vascular disease. The overall objectives are to define these unique processes and to elucidate underlying biochemical, metabolic, and genetic determinants of vascular disease complications in diabetes.

RESEARCH PLAN: Over the past 4 years, we have collaborated with the DCCT/EDIC Study Group, and have made novel observations regarding vascular disease pathogenesis in Type 1 Diabetes. This work has focused our studies on specific pathogenic processes. We will now study a Type 2 Diabetes cohort from the VA Cooperative Study, "Glycemic Control and the Complications of Diabetes, Type 2", with high vascular disease event rates. These collaborations provide a unique opportunity to address the pathogenesis of accelerated atherogenesis in the two main types of diabetes, and will greatly augment the scientific knowledge that will be gained in the conduct of these world-class prospective trials.

METHODS: The Program Project has 4 projects and 3 cores. Project 1 will assess lipoproteins, glycoxidative stress, and inflammation as risk factors in studies involving Type 2 Diabetes patients and cultured cell systems. Based on preliminary data from our initial studies Type 1 patients, changes in the NMR lipoprotein subclass profile will be emphasized.

Project 2 will elucidate interactions between inflammation, modifications of lipoproteins, and autoimmunity in vascular disease risk. These novel concepts are also based upon exciting preliminary data pertaining to LDL-antibody complexes.

Project 3 will pursue interesting preliminary data and define the role of the kallikrein-kinin system in vascular disease complications, with effects on mitogenesis and matrix production.

Project 4 will assess the role of the Insulin Resistance Syndrome and novel factors secreted from adipocytes in the pathophysiology of biochemical risk factors and cardiovascular complications.

Cores include an Administrative Core, a Biostatistics and Epidemiology Core which will link with the trials data coordinating centers, and Molecular and Statistical Genetics Core. Investigators will work in close collaboration with the VA Executive Committee, Study Centers, the Hines Coordinating Center, and some of the other ancillary studies. All data analysis involving clinical outcomes will be performed at the Hines Coordinating Center.

There is true synergism among the projects at both scientific and logistical levels. The Program Project design allows for interactions among multidisciplinary investigators studying the same cohort, which will define how multiple pathological processes interact at the level of the arterial wall to promote atherosclerosis.

Main Manuscript:

There is no independent data for this study, it was part of a larger study. Therefore there will be no results for this record/study.

Typ studie

Pozorovací

Zápis (Aktuální)

298

Kontakty a umístění

Tato část poskytuje kontaktní údaje pro ty, kteří studii provádějí, a informace o tom, kde se tato studie provádí.

Studijní místa

  • Portoriko
      • San Juan, Portoriko, 00921
        • VA Medical Center, San Juan
  • Spojené státy
    • Arizona
      • Phoenix, Arizona, Spojené státy, 85012
        • Carl T. Hayden VA Medical Center
      • Tucson, Arizona, Spojené státy, 85723
        • Southern Arizona VA Health Care System, Tucson
    • California
      • Fresno, California, Spojené státy, 93703
        • VA Central California Health Care System, Fresno
      • Long Beach, California, Spojené státy, 90822
        • VA Medical Center, Long Beach
      • San Diego, California, Spojené státy, 92161
        • VA San Diego Healthcare System, San Diego
    • Florida
      • Miami, Florida, Spojené státy, 33125
        • Miami VA Healthcare System, Miami, FL
    • Illinois
      • Hines, Illinois, Spojené státy, 60141-5000
        • Edward Hines, Jr. VA Hospital
    • Indiana
      • Indianapolis, Indiana, Spojené státy, 46202-2884
        • Richard Roudebush VA Medical Center, Indianapolis
    • Kentucky
      • Lexington, Kentucky, Spojené státy, 40502
        • VA Medical Center, Lexington
    • Minnesota
      • Minneapolis, Minnesota, Spojené státy, 55417
        • VA Medical Center, Minneapolis
    • Nebraska
      • Omaha, Nebraska, Spojené státy, 68105-1873
        • VA Medical Center, Omaha
    • New Jersey
      • East Orange, New Jersey, Spojené státy, 07018
        • VA New Jersey Health Care System, East Orange
    • Pennsylvania
      • Pittsburgh, Pennsylvania, Spojené státy, 15240
        • VA Pittsburgh Health Care System
    • Texas
      • Houston, Texas, Spojené státy, 77030
        • Michael E. DeBakey VA Medical Center (152)
      • San Antonio, Texas, Spojené státy, 78229
        • VA South Texas Health Care System, San Antonio
    • Virginia
      • Salem, Virginia, Spojené státy, 24153
        • VA Medical Center, Salem VA

Kritéria účasti

Výzkumníci hledají lidi, kteří odpovídají určitému popisu, kterému se říká kritéria způsobilosti. Některé příklady těchto kritérií jsou celkový zdravotní stav osoby nebo předchozí léčba.

Kritéria způsobilosti

Věk způsobilý ke studiu

40 let a starší (Dospělý, Starší dospělý)

Přijímá zdravé dobrovolníky

Ne

Pohlaví způsobilá ke studiu

Všechno

Metoda odběru vzorků

Vzorek nepravděpodobnosti

Studijní populace

Patients who are enrolled in the ongoing randomized clinical trial AGlycemic Control and Complications in Diabetes Mellitus Type 2".

Popis

Inclusion Criteria:

Patients with type 2 DM who are no longer responsive to maximum dose of one or more oral agents

Exclusion Criteria:

Patients that did not participate in the VADT.

Studijní plán

Tato část poskytuje podrobnosti o studijním plánu, včetně toho, jak je studie navržena a co studie měří.

Jak je studie koncipována?

Detaily designu

Kohorty a intervence

Skupina / kohorta
Intervence / Léčba
Group 1
Patients who are enrolled in the ongoing randomized clinical trial AGlycemic Control and Complications in Diabetes Mellitus Type 2".
Lék: Rosiglitazone
ROSIGLITAZONE (roe si GLI ta zone) helps to treat type 2 diabetes. It helps to control blood sugar. Treatment is combined with diet and exercise.

Co je měření studie?

Primární výstupní opatření

Měření výsledku
Časové okno
The primary outcome measure is to define these unique processes and to elucidate underlying biochemical, metabolic, and genetic determinants of vascular disease complications in diabetes.
Časové okno: 2, 4, and 6 years.
2, 4, and 6 years.

Spolupracovníci a vyšetřovatelé

Zde najdete lidi a organizace zapojené do této studie.

Sponzor

US Department of Veterans Affairs

Spolupracovníci

American Diabetes Association

Vyšetřovatelé

  • Studijní židle: Carlos Abraira, MD, Miami VA Healthcare System, Miami, FL

Publikace a užitečné odkazy

Osoba odpovědná za zadávání informací o studiu tyto publikace poskytuje dobrovolně. Mohou se týkat čehokoli, co souvisí se studiem.

Obecné publikace

Termíny studijních záznamů

Tato data sledují průběh záznamů studie a předkládání souhrnných výsledků na ClinicalTrials.gov. Záznamy ze studií a hlášené výsledky jsou před zveřejněním na veřejné webové stránce přezkoumány Národní lékařskou knihovnou (NLM), aby se ujistily, že splňují specifické standardy kontroly kvality.

Hlavní termíny studia

Začátek studia

1. června 2007

Primární dokončení (Aktuální)

1. května 2008

Dokončení studie (Aktuální)

1. května 2008

Termíny zápisu do studia

První předloženo

17. listopadu 2005

První předloženo, které splnilo kritéria kontroly kvality

17. listopadu 2005

První zveřejněno (Odhad)

21. listopadu 2005

Aktualizace studijních záznamů

Poslední zveřejněná aktualizace (Odhad)

23. května 2014

Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality

21. května 2014

Naposledy ověřeno

1. května 2014

Více informací

Termíny související s touto studií

Další relevantní podmínky MeSH

Další identifikační čísla studie

  • 465D

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