Diabetic Macular EdemaPhase 2NCT00306904
Safety and Efficacy Study of Small Interfering RNA Molecule (Cand5) to Treat Diabetic Macular Edema
A Phase 2 study testing bevasiranib in people with Diabetic Macular Edema, run by OPKO Health, Inc. at 1 site in United States.
Trial summary
The purpose of this study is to evaluate the pharmacokinetics, safety and preliminary efficacy of 3 doses of Cand5. Cand5 is a small interfering RNA molecule that selectively silences the mRNA encoding for VEGF. The target population are patients with diabetic macular edema. Read more about this study
- Who is it for?
- Ages 21 years and older
- Conditions the study is for
- Diabetic Macular Edema
- What is being tested?
- bevasiranib
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 48 participants
- Where
- 1 siteUnited States
- Study dates
- Jan 2006to Dec 2007
- Phase
- Phase 2
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 21 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Patients must be male or female age 21 or older.
- Patient must sign (and be given) a copy of the written informed consent form.
- Patients must have the diagnosis of diabetes mellitus (type 1 or type 2). Patients with the following will be considered to be sufficient evidence that diabetes is present:
- Current regular use of insulin for the treatment of diabetes mellitus OR
- Current regular use of oral anti-hyperglycemia agents for the treatment of diabetes OR
- Documented diabetes by WHO criteria
- Patients must have ETDRS best corrected visual acuity of 69 to 24 letters (20/40 to 20/320 Snellen Equivalent) in the study eye.
- Patients must have a mean retinal thickness on OCT ≥ 250 microns in the central subfield.
Who cannot join
- Patients with a history of chronic renal failure requiring dialysis or kidney transplant.
- A condition that, in the opinion of the investigator, would preclude participation in the study (e.g., unstable medical status including blood pressure and glycemic control), including:
- Patients in poor glycemic control who, within the last 4 months, initiated intensive insulin treatment (a pump or multiple daily injections) or plan to do so in the next 4 months should not be enrolled.
- Patients with HbA1C > 10%OR
- Patients with systolic blood pressure greater than 170 mmHg and/or diastolic blood pressure greater than 100 mmHg (Note: If blood pressure is brought below 170/100 mmHg by anti-hypertensive treatment, patient can become eligible).
- Past panretinal photocoagulation (PRP) for diabetes within 12 weeks of screening or PRP expected to be needed in the next three months in the study eye.
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- Focal laser therapy to the retina of the study eye within 12 weeks of screening.
- Any intraocular surgery or ocular laser procedures in the study eye within 12 weeks of screening.
- Participation in an investigational trial within 30 days of study entry that involved treatment with any drug that has not received regulatory approval at the time of study entry.
Trial locations and contacts
1 site in 1 country.
United States1 site
Retina Associates of Cleveland
Beechwood, Ohio, 44122
About this study
Official title: A Phase II, Pharmacokinetic, Randomized, Double-Masked, Controlled, Dose Comparison Study of Cand5 for Intravitreal Injection for the Treatment of Diabetic Macular Edema
The purpose of this study is to evaluate the pharmacokinetics, safety and preliminary efficacy of 3 doses of Cand5. Cand5 is a small interfering RNA molecule that selectively silences the mRNA encoding for VEGF. The target population are patients with diabetic macular edema.
Read the detailed description
Diabetic retinopathy is the leading cause of newly diagnosed blindness in the working age (20-74) population in the United States1 and diabetic macular edema (DME) is the leading cause of vision loss in diabetic retinopathy. DME is the result of the breakdown of the retinal capillary endothelium in patients with diabetes mellitus (Type I and II).
A key factor in the development of DME is the permeability of the blood-retinal barrier. The breakdown of the endothelial tight junctions of the capillary walls in the retinal vasculature leads to increased permeation of salts, proteins, and water from the capillary luminal side of the barrier and the accumulation of fluid in the extracellular space. Multiple agents appear to contribute to the disruption of the blood-retina barrier,including vasoactive agents, prostaglandin and vascular endothelial growth factor (VEGF). VEGF is a peptide that promotes neovascularization and increases vascular permeability. If the resulting fluid is more than the amount that can be removed through the active pump mechanism (retinal pigmented epithelium), fluids continue to accumulate and edema develops. When thickening evolves or threatens the center of the fovea there is a high risk of visual loss.
Cand5 is a synthetic double stranded RNA (dsRNA) oligonucleotide. The molecule is a duplex formed by the hybridization of two partially complementary single strand RNAs in which the 3' end are capped with 2 deoxyribose (dT) units. Hybridization occurs across 19 ribose base pairs to yield the Cand5 molecule. Cand5 has a molecular weight of 13,345 grams/mole. Cand5 selectively silences the mRNA encoding for VEGF.
A comparison will be made between the three (3) treatment arms with regard to safety, efficacy, and duration of effect to determine a safe and efficacious dose of Cand5 appropriate for evaluation in future pivotal trials.
- Conditions
- Diabetic Macular Edema
- Being tested
- bevasiranib
- Keywords
- Macular, Edema, Diabetic, Retinopathy
- Medical subject headings
- Edema, Retinal Diseases
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
bevasiranibDrug
Also called Cand5
| Study group | Role | What they receive |
|---|---|---|
| 1 | Experimental | 3.0 mg/eye dose group Receives: Drug: bevasiranib |
| 2 | Experimental | 1.5 mg/eye dose group Receives: Drug: bevasiranib |
| 3 | Experimental | 0.2 mg/eye dose group Receives: Drug: bevasiranib |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change from baseline at the 12-week evaluation in macular edema as measured by optical coherence tomography.
Secondary outcomes (1)
Mean BCVA line/letters change from baseline at the 12-week evaluation.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted27 Mar 2006 (estimated)
- Study startJan 2006
- Primary completionSep 2007
- Study completionDec 2007
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Diabetic Macular EdemaStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 48 participants (actual)
Sponsor and investigators
- Lead sponsor
- OPKO Health, Inc.
- Sponsor type
- Industry (pharma, biotech, devices)
- Investigators
- Christine Du Castel, MD, Study director, Chiltern International
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00306904
- Sponsor's protocol ID
- ACU211
- Status last verified
- Jul 2008
- First submitted
- 23 Mar 2006
- Last updated
- 25 Jul 2008
- Results posted
- No
- Data monitoring committee
- Yes
Study at a glance
From the registry record, last updated by the sponsor on 25 Jul 2008. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Phase II, Pharmacokinetic, Randomized, Double-Masked, Controlled, Dose Comparison Study of Cand5 for Intravitreal Injection for the Treatment of Diabetic Macular Edema
- ClinicalTrials.gov ID
- NCT00306904
- Acronym / sponsor ID
- ACU211
- Conditions
- Diabetic Macular Edema
- Keywords
- Macular, Edema, Diabetic, Retinopathy
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 48 participants (actual)
- Lead sponsor
- OPKO Health, Inc.Industry (pharma, biotech, devices)
- Study start
- Jan 2006
- Primary completion
- Sep 2007 (actual)
- Study completion
- Dec 2007 (actual)
- First posted
- 27 Mar 2006 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The purpose of this study is to evaluate the pharmacokinetics, safety and preliminary efficacy of 3 doses of Cand5. Cand5 is a small interfering RNA molecule that selectively silences the mRNA encoding for VEGF. The target population are patients with diabetic macular edema.
Detailed description
Diabetic retinopathy is the leading cause of newly diagnosed blindness in the working age (20-74) population in the United States1 and diabetic macular edema (DME) is the leading cause of vision loss in diabetic retinopathy. DME is the result of the breakdown of the retinal capillary endothelium in patients with diabetes mellitus (Type I and II).
A key factor in the development of DME is the permeability of the blood-retinal barrier. The breakdown of the endothelial tight junctions of the capillary walls in the retinal vasculature leads to increased permeation of salts, proteins, and water from the capillary luminal side of the barrier and the accumulation of fluid in the extracellular space. Multiple agents appear to contribute to the disruption of the blood-retina barrier,including vasoactive agents, prostaglandin and vascular endothelial growth factor (VEGF). VEGF is a peptide that promotes neovascularization and increases vascular permeability. If the resulting fluid is more than the amount that can be removed through the active pump mechanism (retinal pigmented epithelium), fluids continue to accumulate and edema develops. When thickening evolves or threatens the center of the fovea there is a high risk of visual loss.
Cand5 is a synthetic double stranded RNA (dsRNA) oligonucleotide. The molecule is a duplex formed by the hybridization of two partially complementary single strand RNAs in which the 3' end are capped with 2 deoxyribose (dT) units. Hybridization occurs across 19 ribose base pairs to yield the Cand5 molecule. Cand5 has a molecular weight of 13,345 grams/mole. Cand5 selectively silences the mRNA encoding for VEGF.
A comparison will be made between the three (3) treatment arms with regard to safety, efficacy, and duration of effect to determine a safe and efficacious dose of Cand5 appropriate for evaluation in future pivotal trials.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind (participant, care provider, investigator, outcomes assessor)
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| 1 | Experimental | Drug: bevasiranib3.0 mg/eye dose group |
| 2 | Experimental | Drug: bevasiranib1.5 mg/eye dose group |
| 3 | Experimental | Drug: bevasiranib0.2 mg/eye dose group |
Who may qualify
- Ages
- 21 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (8 listed)
- Patients must be male or female age 21 or older.
- Patient must sign (and be given) a copy of the written informed consent form.
- Patients must have the diagnosis of diabetes mellitus (type 1 or type 2). Patients with the following will be considered to be sufficient evidence that diabetes is present:
- Patients must have ETDRS best corrected visual acuity of 69 to 24 letters (20/40 to 20/320 Snellen Equivalent) in the study eye.
- Patients must have a mean retinal thickness on OCT ≥ 250 microns in the central subfield.
Key exclusion criteria (9 listed)
- Patients with a history of chronic renal failure requiring dialysis or kidney transplant.
- A condition that, in the opinion of the investigator, would preclude participation in the study (e.g., unstable medical status including blood pressure and glycemic control), including:
- Past panretinal photocoagulation (PRP) for diabetes within 12 weeks of screening or PRP expected to be needed in the next three months in the study eye.
- Focal laser therapy to the retina of the study eye within 12 weeks of screening.
- Any intraocular surgery or ocular laser procedures in the study eye within 12 weeks of screening.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| bevasiranibAlso: Cand5 | Drug | 1, 2, 3 |
Primary outcome
Change from baseline at the 12-week evaluation in macular edema as measured by optical coherence tomography.
1 secondary outcome
Mean BCVA line/letters change from baseline at the 12-week evaluation.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 25 Jul 2008.
- SponsorLink provided by the sponsor.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Christine Du Castel, MD study director
Chiltern International
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing bevasiranib in people with Diabetic Macular Edema, run by OPKO Health, Inc. at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 8 inclusion and 9 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 25 Jul 2008. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change from baseline at the 12-week evaluation in macular edema as measured by optical coherence tomography.. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 25 Jul 2008.