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Response To Oral Agents in Diabetes (ROAD)- Pilot Study (ROAD)

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT00780715
First Posted: October 28, 2008
Last Update Posted: October 26, 2017
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by (Responsible Party):
Ewan Pearson, University of Dundee
  Purpose

This proposal is to fund a pilot study to assess feasibility and refine methodology for an intended large Scotland wide study on Response to Oral Agents in Diabetes (ROAD). The study will collect cohorts of patients who have carefully controlled standardised dose titration and monitoring with an assessment of drug response and side effects over a 6 month period. The primary aim will be to use these cohorts to investigate phenotypic and genotypic (pharmacogenetic) determinants of response.

Drug naïve patients will be treated with Metformin. Patients who have failed on Metformin or are intolerant of Metformin will be randomised to gliclazide, pioglitazone or sitagliptin. With the ability to capture patient data beyond 6 months via data linkage we will monitor time to treatment failure and therefore compare which of the 3 oral agents is the best therapy to use after Metformin in a cost efficient and "real world" RCT.


Condition Intervention Phase
Diabetes Mellitus, Type 2 Drug: Gliclazide MR Drug: Sitagliptin Drug: Pioglitazone Drug: Metformin Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Response To Oral Agents in Diabetes (ROAD)- Pilot Study

Resource links provided by NLM:


Further study details as provided by Ewan Pearson, University of Dundee:

Primary Outcome Measures:
  • HbA1c Change [ Time Frame: 6 months ]
    Units are absolute difference in %HbA1c (HbA1c being the percentage of glycated Haemoglobin, reflecting glucose exposure over the last 3 months)


Enrollment: 29
Study Start Date: December 2008
Study Completion Date: October 2009
Primary Completion Date: October 2009 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Gliclazide MR Drug: Gliclazide MR
30mg daily increased to 60mg if HbA1c > 7% at 3 months
Other Name: Diamicron MR
Active Comparator: Sitagliptin Drug: Sitagliptin
Sitagliptin 100mg daily for 6 months
Active Comparator: Pioglitazone Drug: Pioglitazone
Pioglitazone 30mg daily , increased to 45mg daily if HbA1c >7% at 3 months. 6 months duration
Other Name: Actos
Experimental: Metformin Drug: Metformin
Metformin 500 mg od for 1 week, bd for 1 week, 1g mane 500 mg nocte 1 week, 1g bd there after. Total of 6 months treatment

Detailed Description:
The Response to Oral Agents in Diabetes (ROAD) study aims to address the limitations of observational data by creating a prospective study of incident users of oral agents. For the first six months the research team will ensure a protocol driven dose titration, standardised monitoring of adherence, response and side effects and standardised deviations from therapy. Thereafter patients will receive 6 monthly monitoring and further protocol led dose titration by the GP. Biochemistry, prescribing data, morbidity and mortality data will be captured for up to 10 years from drug initiation. The ROAD study will provide a highly powered prospective cohort to investigate phenotypic and genotypic determinants of response in its own right. However, this cohort will be used synergistically with ongoing observational pharmacogenetics studies, allowing for crucial replication of 'positive' signals. Furthermore, by randomisation at drug initiation, long term community follow up will allow a comparison of time to treatment failure in patients treated with gliclazide, pioglitazone and sitagliptin in a much more cost effective and 'real-world' setting than traditional prospective randomised trials This pilot study is to assess the feasibility of the larger complex intervention. The primary outcome of the pilot is HbA1c change. Other measures regarding recruitment and dose titration will be assessed. With knowledge from this pilot, an application will be made for a large region or Scotland wide study to collect 2000 patients incident to oral diabetes treatment.
  Eligibility

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Ages Eligible for Study:   36 Years to 79 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Cohort 1 - metformin treatment

    • Type 2 diabetes diagnosed more than 6 weeks prior to visit 1
    • GP considers adequate diet and lifestyle advice given
    • Age >35 and < 80
    • Age of diabetes diagnosis >35
    • White European
    • HbA1c >7% & <=9%
    • eGFR>=50 ml/min
    • ALT <= 2.5*ULN
    • Contactable by telephone
  • Cohort 2 - 2nd line treatment

    • Type 2 diabetes
    • Treated with metformin for more than 3 months; or metformin intolerant
    • Age >35 and < 80
    • Age of diabetes diagnosis >35
    • White European
    • HbA1c >7% & <=9%
    • eGFR>=50 ml/min
    • ALT <= 2.5*ULN
    • No previous history of heart failure; No patients with documented evidence of left ventricular systolic dysfunction OR with symptoms and signs consistent with a clinical diagnosis of heart failure
    • No treatment with Gemfibrozil or Rifampicin (CYP2C8 inhibitor or inducer respectively); or with Miconazole or phenylbutazone (increased hypoglycemic effect of gliclazide).
    • No diagnosis of osteoporosis
    • Contactable by telephone

Exclusion Criteria:

  • Cohort 1

    • Type 1 diabetes
    • HbA1c >9% or <=7%
    • eGFR<50 ml/min
    • ALT > 2.5*ULN
    • Alcohol consumption in excess of 50 units per week
    • Pregnancy, lactation or a female planning to conceive within the study period
    • Any other significant medical reason for exclusion as determined by the investigator
  • Cohort 2

    • Type 1 diabetes
    • HbA1c >9% or <=7%
    • eGFR< 50 ml/min
    • ALT > 2.5*ULN
    • Previous history of heart failure OR documented evidence of left ventricular systolic dysfunction OR symptoms and signs consistent with a clinical diagnosis of heart failure
    • Ongoing treatment with Gemfibrozil or Rifampicin (CYP2C8 inhibitor or inducer respectively); or with Miconazole or phenylbutazone (increased hypoglycemic effect of gliclazide).
    • Previous diagnosis of osteoporosis
    • Pregnancy, lactation or a female planning to conceive within the study period
    • Any other significant medical reason for exclusion as determined by the investigator
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00780715


Locations
United Kingdom
Ninewells Hospital & Medical School
Dundee, United Kingdom, DD1 9SY
Sponsors and Collaborators
University of Dundee
Investigators
Principal Investigator: Ewan R Pearson University of Dundee
  More Information

Responsible Party: Ewan Pearson, Professor of Diabetic Medicine, University of Dundee
ClinicalTrials.gov Identifier: NCT00780715     History of Changes
Other Study ID Numbers: 2008DM05
EudraCT 2008-004790-18
First Submitted: October 27, 2008
First Posted: October 28, 2008
Results First Submitted: May 24, 2017
Results First Posted: October 26, 2017
Last Update Posted: October 26, 2017
Last Verified: October 2017

Keywords provided by Ewan Pearson, University of Dundee:
Diabetes therapies
Pharmacogenetics

Additional relevant MeSH terms:
Diabetes Mellitus
Diabetes Mellitus, Type 2
Glucose Metabolism Disorders
Metabolic Diseases
Endocrine System Diseases
Pioglitazone
Metformin
Sitagliptin Phosphate
Gliclazide
Hypoglycemic Agents
Physiological Effects of Drugs
Incretins
Hormones
Hormones, Hormone Substitutes, and Hormone Antagonists
Dipeptidyl-Peptidase IV Inhibitors
Protease Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action