Safety and Efficacy Study of Small Interfering RNA Molecule (Cand5) to Treat Diabetic Macular Edema
A Phase II, Pharmacokinetic, Randomized, Double-Masked, Controlled, Dose Comparison Study of Cand5 for Intravitreal Injection for the Treatment of Diabetic Macular Edema
調査の概要
詳細な説明
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.
研究の種類
入学 (実際)
段階
- フェーズ2
連絡先と場所
研究場所
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Ohio
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Beechwood、Ohio、アメリカ、44122
- Retina Associates of Cleveland
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参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
説明
Inclusion Criteria:
- 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.
Exclusion Criteria:
- 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.
- 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.
研究計画
研究はどのように設計されていますか？
デザインの詳細
- 主な目的：処理
- 割り当て：ランダム化
- 介入モデル：並列代入
- マスキング：4倍
武器と介入
参加者グループ / アーム |
介入・治療 |
|---|---|
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実験的：1
3.0 mg/eye dose group
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他の名前：
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実験的：2
1.5 mg/eye dose group
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他の名前：
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実験的：3
0.2 mg/eye dose group
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他の名前：
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この研究は何を測定していますか？
主要な結果の測定
結果測定 |
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Change from baseline at the 12-week evaluation in macular edema as measured by optical coherence tomography.
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二次結果の測定
結果測定 |
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Mean BCVA line/letters change from baseline at the 12-week evaluation.
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協力者と研究者
スポンサー
捜査官
- スタディディレクター：Christine Du Castel, MD、Chiltern International
出版物と役立つリンク
便利なリンク
研究記録日
主要日程の研究
研究開始
一次修了 (実際)
研究の完了 (実際)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (見積もり)
学習記録の更新
投稿された最後の更新 (見積もり)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
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