- ICH GCP
- US Clinical Trials Registry
- Klinisk forsøg NCT00728156
Platelet-dependent Thrombosis: a Placebo-controlled Trial of Antiplatelet Therapy (Clopidogrel)
7. oktober 2015 opdateret af: Newcastle-upon-Tyne Hospitals NHS Trust
Assessment of Platelet-dependent Thrombosis by an ex Vivo Arterial Injury Model: a Placebo Controlled Trial of Clopidogrel as Antiplatelet Therapy in Patients With Type 2 Diabetes Mellitus and Coronary Artery Disease
Patients with diabetes are more likely to develop furring of their coronary arteries and present with angina and heart attacks.
Furthermore, after such an event, they have poorer outcomes (higher rates of death) and survivors are more likely to have recurring symptoms.
Using a novel "clotting chamber" the investigators have shown that patients with diabetes are more likely to develop blood clots.
This study will look at the role of different blood thinning medications in patients with diabetes.
If successful, the investigators will provide evidence to conduct large clinical studies to look at the role of additional blood thinning medication in reducing heart attacks and strokes in patients with diabetes.
Studieoversigt
Status
Afsluttet
Betingelser
Intervention / Behandling
Detaljeret beskrivelse
The objective of this study is to compare the effect of Clopidogrel on platelet dependent thrombosis in patients with T2DM and CAD with placebo.
The Badimon chamber, an ex vivo arterial injury model is used for this purpose.
This model simulates the in vivo situation of high shear arterial wall damage and helps to quantify thrombus which is the sum endpoint of all haemostatic abnormalities seen in vitro.
Undersøgelsestype
Interventionel
Tilmelding (Faktiske)
90
Fase
- Fase 4
Kontakter og lokationer
Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.
Studiesteder
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Tyne and Wear
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Newcastle upon Tyne, Tyne and Wear, Det Forenede Kongerige, NE4 6BE
- Newcastle Diabetes Centre, Newcastle General Hospital
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Newcastle upon Tyne, Tyne and Wear, Det Forenede Kongerige, NE77DN
- Freeman Hospital
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Deltagelseskriterier
Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.
Berettigelseskriterier
Aldre berettiget til at studere
18 år til 75 år (Voksen, Ældre voksen)
Tager imod sunde frivillige
Ingen
Køn, der er berettiget til at studere
Alle
Beskrivelse
Inclusion Criteria:
Patients with T2DM and CAS as defined below:
- Clinical definitions
- T2DM: Diagnosed according to the WHO criteria [53].
- CAD:Presence of any one of the following: Angina plus positive exercise tolerance test, enzyme and/or Q wave positive myocardial infarction, angiographic evidence ( >50% stenosis of one vessel), percutaneous or surgical coronary revascularisation.
- Aged between 18 and 75
- Provided written consent for participation in the trial prior to any study-specific procedures or requirements.
Exclusion Criteria:
- Contraindication to Clopidogrel
- Smoking (current smokers and patients who quit smoking less than six months)
- Malignancy(diagnosed or under investigation)
- Haematological disorders (Anaemia, malignancy, bleeding disorders)
- Women of child-bearing potential
- Use of corticosteroids/other antithrombotic agents(warfarin)
- Chronic liver disease (Cirrhosis, malignancy and patients with more than twice the upper limit of liver function tests)
- Unable to consent.
- Use of other investigational study drugs within 1 year prior to study entry
- Previous participation in this study
Studieplan
Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Behandling
- Tildeling: Randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Firedobbelt
Våben og indgreb
Deltagergruppe / Arm |
Intervention / Behandling |
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Aktiv komparator: C
Patients assigned to clopidogrel in addition to their standard care.(all
patients will be on aspirin)We aim to study the effect of clopidogrel as dual antiplatelet therapy in patients with established coronary artery disease and type 2 diabetes.
Ninety patients with type 2 diabetes and stable coronary artery disease has been randomly treated with clopidogrel or placebo (45 each) for one week in addition to their standard care (including aspirin,75 mg once daily).
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75 milligrams, oral, clopidogrel, one tablet daily, for seven days after the baseline chamber study.
Andre navne:
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Placebo komparator: P
Patients assigned to placebo in addition to their standard care.(all
patients will be on aspirin).This is a single-centre randomised double-blind placebo-controlled parallel design study, comparing efficacy of clopidogrel versus placebo in patients with T2DM and coronary artery disease.
Ninety patients have completed the study.
All patients were on their routine medications as per standard practice.
After informed consent, participants were randomised to receive either clopidogrel 75mg daily or placebo for 7 days.
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Placebo: Hydroxy methyl cellulose, similar in weight to the active medication 75 mgs, oral tablets, once a day
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Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Tidsramme |
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To compare the effect of Clopidogrel in reduction of thrombogenicity in patients with T2DM and CAD with placebo
Tidsramme: seven days
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seven days
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Sekundære resultatmål
Resultatmål |
Tidsramme |
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To identify patients (in particular T2DM patients with CAD) resistant to oral antiplatelet therapy
Tidsramme: seven days
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seven days
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To characterise features in T2DM patients responsible for increased thrombogenicity
Tidsramme: seven days
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seven days
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Samarbejdspartnere og efterforskere
Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.
Efterforskere
- Ledende efterforsker: Azfar G Zaman, MD FRCP, Consultant cardiologist and Honoraray Lecturer
Publikationer og nyttige links
Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.
Generelle publikationer
- Natarajan A, Marshall SM, Worthley SG, Badimon JJ, Zaman AG. The presence of coronary artery disease increases platelet-dependent thrombosis in patients with type 2 diabetes mellitus. J Thromb Haemost. 2008 Dec;6(12):2210-3. doi: 10.1111/j.1538-7836.2008.03176.x. Epub 2008 Oct 1. No abstract available.
- Osende JI, Badimon JJ, Fuster V, Herson P, Rabito P, Vidhun R, Zaman A, Rodriguez OJ, Lev EI, Rauch U, Heflt G, Fallon JT, Crandall JP. Blood thrombogenicity in type 2 diabetes mellitus patients is associated with glycemic control. J Am Coll Cardiol. 2001 Nov 1;38(5):1307-12. doi: 10.1016/s0735-1097(01)01555-8.
- Shechter M, Merz CN, Paul-Labrador MJ, Kaul S. Blood glucose and platelet-dependent thrombosis in patients with coronary artery disease. J Am Coll Cardiol. 2000 Feb;35(2):300-7. doi: 10.1016/s0735-1097(99)00545-8.
- Helft G, Osende JI, Worthley SG, Zaman AG, Rodriguez OJ, Lev EI, Farkouh ME, Fuster V, Badimon JJ, Chesebro JH. Acute antithrombotic effect of a front-loaded regimen of clopidogrel in patients with atherosclerosis on aspirin. Arterioscler Thromb Vasc Biol. 2000 Oct;20(10):2316-21. doi: 10.1161/01.atv.20.10.2316.
- Natarajan A, Zaman AG, Marshall SM. Platelet hyperactivity in type 2 diabetes: role of antiplatelet agents. Diab Vasc Dis Res. 2008 Jun;5(2):138-44. doi: 10.3132/dvdr.2008.023.
Datoer for undersøgelser
Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.
Studer store datoer
Studiestart
1. august 2009
Primær færdiggørelse (Faktiske)
1. december 2010
Studieafslutning (Faktiske)
1. april 2012
Datoer for studieregistrering
Først indsendt
1. august 2008
Først indsendt, der opfyldte QC-kriterier
4. august 2008
Først opslået (Skøn)
5. august 2008
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
12. oktober 2015
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
7. oktober 2015
Sidst verificeret
1. oktober 2015
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
- Hjertesygdomme
- Hjerte-kar-sygdomme
- Karsygdomme
- Glukosemetabolismeforstyrrelser
- Metaboliske sygdomme
- Åreforkalkning
- Arterielle okklusive sygdomme
- Sygdomme i det endokrine system
- Embolisme og trombose
- Koronararteriesygdom
- Myokardieiskæmi
- Koronar sygdom
- Diabetes mellitus
- Diabetes mellitus, type 2
- Trombose
- Lægemidlers fysiologiske virkninger
- Neurotransmittermidler
- Molekylære mekanismer for farmakologisk virkning
- Blodpladeaggregationshæmmere
- Purinerge P2Y-receptorantagonister
- Purinerge P2-receptorantagonister
- Purinerge antagonister
- Purinerge midler
- Clopidogrel
Andre undersøgelses-id-numre
- 3639a
- British Heart Foundation (Andet bevillings-/finansieringsnummer: FS/033/07)
Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .
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