- ICH GCP
- US-Register für klinische Studien
- Klinische Studie NCT02468986
Study of Venous Endothelial Cells in Rheumatoid Arthritis
Analysis of Endothelial Cells in Rheumatoid Arthritis
Heart disease is the major contributor of early death in rheumatoid arthritis (RA) and is not influenced by traditional risk factors. Blood vessel dysfunction has been associated with heart disease and complications such as heart attack. The vessel dysfunction is thought to be mediated in part to inflammation. RA patients have evidence of vessel dysfunction seen on ultrasound that improves after medications are given.
The purpose of this study is to evaluate patients with controlled or uncontrolled rheumatoid arthritis to determine if there is a difference in the protein expression in the cells that line the blood vessels compared to healthy people.
Studienübersicht
Status
Bedingungen
Detaillierte Beschreibung
Studientyp
Einschreibung (Tatsächlich)
Kontakte und Standorte
Studienorte
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Texas
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Dallas, Texas, Vereinigte Staaten, 75390
- University of Texas Southwestern
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Dallas, Texas, Vereinigte Staaten, 75235
- Parkland Memorial Hospital
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Teilnahmekriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Probenahmeverfahren
Studienpopulation
Beschreibung
Inclusion Criteria:
Rheumatoid arthritis:
- Age 18-75 years
- Rheumatoid arthritis defined by 1987 American College of Rheumatology criteria
- Attending clinic at University of Texas Southwestern Aston Clinic for Rheumatology or Parkland Arthritis Clinic.
Healthy controls:
- Age 18-75 years.
Exclusion Criteria:
Rheumatoid arthritis:
- Insulin dependent diabetes
- Cardiovascular or Cerebrovascular disease
- Tobacco use in last 24 months
- Uncontrolled blood pressure
- Uncontrolled cholesterol
- Pregnant or nursing
- Prednisone greater than 10mg per day
- Stable methotrexate dose for less than 4 weeks
- Undergoing Infliximab infusions
Healthy controls:
- Insulin dependent diabetes
- Cardiovascular or Cerebrovascular disease
- Tobacco use in last 24 months
- Uncontrolled high blood pressure
- Uncontrolled cholesterol
- Pregnant or nursing
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
Kohorten und Interventionen
Gruppe / Kohorte |
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Uncontrolled Rheumatoid Arthritis
18-75 years old; Rheumatoid arthritis, defined by 1987 American College Rheumatology criteria; Attending clinic at Aston Center for Rheumatology or Parkland Rheumatology Clinic; Uncontrolled: Patients will be labeled as uncontrolled RA if Disease Activity Score (DAS) score is >3.2 and C-reactive protein (mg/dL) elevated above normal range. Excluding: Insulin dependent diabetes; Cardiovascular or Cerebrovascular disease (history of myocardial infarction, stroke, peripheral vascular disease); Tobacco use in the past 24 months; Uncontrolled hypertension (BP > 150/90) in the past 3 months; Uncontrolled hyperlipidemia (LDL>160) in the past 6 months; Pregnant or nursing. |
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Controlled Rheumatoid Arthritis
18-75 years old; Rheumatoid arthritis, defined by 1987 American College Rheumatology criteria; Attending clinic at Aston Center for Rheumatology or Parkland Rheumatology Clinic; Controlled: Disease activity score (DAS) <3.2, normal C-reactive protein.
Excluding: Insulin dependent diabetes; Cardiovascular or Cerebrovascular disease (history of myocardial infarction, stroke, peripheral vascular disease); Tobacco use in the past 24 months; Uncontrolled hypertension (BP > 150/90) in the past 3 months; Uncontrolled hyperlipidemia (LDL>160) in the past 6 months; Pregnant or nursing.
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Healthy Controls
18-75 years old.
Excluding: Insulin dependent diabetes; Cardiovascular or Cerebrovascular disease (history of myocardial infarction, stroke, peripheral vascular disease); Tobacco use in the past 24 months; Uncontrolled hypertension (BP > 150/90) in the past 3 months; Uncontrolled hyperlipidemia (LDL>160) in the past 6 months; Pregnant or nursing.
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Was misst die Studie?
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
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Endothelial cell protein expression by immunofluorescence microscopy of endothelial nitric oxide synthase, nitrotyrosine, nuclear factor kappa B.
Zeitfenster: Cells are immediately processed following extraction and placed in -80 degree C freezer. Cells are then analyzed by immunofluorescence microscopy in batches of subjects. Patient is followed-up 24 hours after by phone.
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Immunofluorescence microscopy of frozen endothelial cells will be processed in batches to reduce bias.
Cells are assessed for individual protein expression at study entry.
Repeated collection of cells will not been done.
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Cells are immediately processed following extraction and placed in -80 degree C freezer. Cells are then analyzed by immunofluorescence microscopy in batches of subjects. Patient is followed-up 24 hours after by phone.
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Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
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Serum cytokines analysis by cytometric bead array
Zeitfenster: Measured once upon enrollment into study. Patient is followed-up 24 hours after by phone.
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Interleukin-1, Interleukin-6, Tumor Necrosis Factor -alpha
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Measured once upon enrollment into study. Patient is followed-up 24 hours after by phone.
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Flow mediated dilation assessed in the brachial artery by ultrasound
Zeitfenster: Measured once upon enrollment into study. Patient is followed-up 24 hours after by phone.
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Measured once upon enrollment into study. Patient is followed-up 24 hours after by phone.
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Mitarbeiter und Ermittler
Ermittler
- Hauptermittler: Elizabeth B Solow, MD, University of Texas
- Hauptermittler: David Karp, MD, PhD, University of Texas
Publikationen und hilfreiche Links
Allgemeine Veröffentlichungen
- del Rincon ID, Williams K, Stern MP, Freeman GL, Escalante A. High incidence of cardiovascular events in a rheumatoid arthritis cohort not explained by traditional cardiac risk factors. Arthritis Rheum. 2001 Dec;44(12):2737-45. doi: 10.1002/1529-0131(200112)44:123.0.CO;2-%23.
- Neunteufl T, Katzenschlager R, Hassan A, Klaar U, Schwarzacher S, Glogar D, Bauer P, Weidinger F. Systemic endothelial dysfunction is related to the extent and severity of coronary artery disease. Atherosclerosis. 1997 Feb 28;129(1):111-8. doi: 10.1016/s0021-9150(96)06018-2.
- Vaudo G, Marchesi S, Gerli R, Allegrucci R, Giordano A, Siepi D, Pirro M, Shoenfeld Y, Schillaci G, Mannarino E. Endothelial dysfunction in young patients with rheumatoid arthritis and low disease activity. Ann Rheum Dis. 2004 Jan;63(1):31-5. doi: 10.1136/ard.2003.007740.
- Maradit-Kremers H, Crowson CS, Nicola PJ, Ballman KV, Roger VL, Jacobsen SJ, Gabriel SE. Increased unrecognized coronary heart disease and sudden deaths in rheumatoid arthritis: a population-based cohort study. Arthritis Rheum. 2005 Feb;52(2):402-11. doi: 10.1002/art.20853.
- Gonzalez-Juanatey C, Llorca J, Sanchez-Andrade A, Garcia-Porrua C, Martin J, Gonzalez-Gay MA. Short-term adalimumab therapy improves endo-thelial function in patients with rheumatoid arthritis refractory to infliximab. Clin Exp Rheumatol. 2006 May-Jun;24(3):309-12.
- Galarraga B, Khan F, Kumar P, Pullar T, Belch JJ. C-reactive protein: the underlying cause of microvascular dysfunction in rheumatoid arthritis. Rheumatology (Oxford). 2008 Dec;47(12):1780-4. doi: 10.1093/rheumatology/ken386. Epub 2008 Oct 14.
- Schwartz R, Osborne-Lawrence S, Hahner L, Gibson LL, Gormley AK, Vongpatanasin W, Zhu W, Word RA, Seetharam D, Black S, Samols D, Mineo C, Shaul PW. C-reactive protein downregulates endothelial NO synthase and attenuates reendothelialization in vivo in mice. Circ Res. 2007 May 25;100(10):1452-9. doi: 10.1161/01.RES.0000267745.03488.47. Epub 2007 Apr 19.
- Oemar BS, Tschudi MR, Godoy N, Brovkovich V, Malinski T, Luscher TF. Reduced endothelial nitric oxide synthase expression and production in human atherosclerosis. Circulation. 1998 Jun 30;97(25):2494-8. doi: 10.1161/01.cir.97.25.2494.
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Tatsächlich)
Primärer Abschluss (Tatsächlich)
Studienabschluss (Tatsächlich)
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Schätzen)
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
Andere Studien-ID-Nummern
- STU 012011-034
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