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Markers and Mechanisms of Vascular Disease in Type II Diabetes

21. Mai 2014 aktualisiert von: 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.

Studienübersicht

Status

Abgeschlossen

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

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.

Studientyp

Beobachtungs

Einschreibung (Tatsächlich)

298

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienorte

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

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

40 Jahre und älter (Erwachsene, Älterer Erwachsener)

Akzeptiert gesunde Freiwillige

Nein

Studienberechtigte Geschlechter

Alle

Probenahmeverfahren

Nicht-Wahrscheinlichkeitsprobe

Studienpopulation

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

Beschreibung

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.

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

Kohorten und Interventionen

Gruppe / Kohorte
Intervention / Behandlung
Group 1
Patients who are enrolled in the ongoing randomized clinical trial AGlycemic Control and Complications in Diabetes Mellitus Type 2".
Arzneimittel: 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.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Zeitfenster
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.
Zeitfenster: 2, 4, and 6 years.
2, 4, and 6 years.

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

US Department of Veterans Affairs

Mitarbeiter

American Diabetes Association

Ermittler

  • Studienstuhl: Carlos Abraira, MD, Miami VA Healthcare System, Miami, FL

Publikationen und hilfreiche Links

Die Bereitstellung dieser Publikationen erfolgt freiwillig durch die für die Eingabe von Informationen über die Studie verantwortliche Person. Diese können sich auf alles beziehen, was mit dem Studium zu tun hat.

Allgemeine Veröffentlichungen

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn

1. Juni 2007

Primärer Abschluss (Tatsächlich)

1. Mai 2008

Studienabschluss (Tatsächlich)

1. Mai 2008

Studienanmeldedaten

Zuerst eingereicht

17. November 2005

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

17. November 2005

Zuerst gepostet (Schätzen)

21. November 2005

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Schätzen)

23. Mai 2014

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

21. Mai 2014

Zuletzt verifiziert

1. Mai 2014

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Zusätzliche relevante MeSH-Bedingungen

Andere Studien-ID-Nummern

  • 465D

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