E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Autosomal Dominant Polycystic Kidney Disease (ADPKD) |
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E.1.1.1 | Medical condition in easily understood language |
Kidney cysts (fluid like-filled balloons) |
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E.1.1.2 | Therapeutic area | Diseases [C] - Congenital, Hereditary, and Neonatal Diseases and Abnormalities [C16] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 17.1 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10036046 |
E.1.2 | Term | Polycystic kidney, autosomal dominant |
E.1.2 | System Organ Class | 100000004850 |
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E.1.3 | Condition being studied is a rare disease | No |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
To demonstrate whether tolvaptan modifies ADPKD progression as measured by changes in endpoints of total kidney volume (TKV) and
renal function. Disease modification is evidenced further by the noninferiority of endpoint progression slope during this study for those
receiving early, continuous treatment with tolvaptan, as compared to those with delayed treatment (ie, whose initial treatment was with
placebo in trial 156-04-251). |
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E.2.2 | Secondary objectives of the trial |
To determine whether, for placebo-treated subjects from trial 156-04-251, the annual rate of change (slope) in TKV and renal function changes during the crossover from placebo to tolvaptan treatment.
To explore exposure response relationship among all subjects enrolled in this trial for changes in TKV, renal function and hypertension. |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
1) Successful completion (protocol defined completer without early termination) of a previous Phase 1, 2, or 3 tolvaptanADPKD or renal impairment trial, with a confirmed diagnosis of ADPKD (unless approved
by the sponsor and medical monitor). If early
termination from the previous trial was due to exceptional circumstances, reinitiation of tolvaptan is judged to be safe, and
participation is approved by the sponsor and medical monitor, subjects may be enrolled beginning in January 2012.
2) Estimated GFR ≥ 30 mL/min/1.73m2 within 45 days prior to the baseline visit (calculated using the IDMS-traceable modification of diet
in renal disease [4 parameter MDRD] equation with correction for gender and race). Subjects with lower estimated GFR (eGFR) may be permitted with documented medical monitor approval prior to enrollment. |
|
E.4 | Principal exclusion criteria |
Trial Entry Exclusion Criteria
1) Inability to provide written informed consent.
2) Women of childbearing potential, or their partners, who will not adhere to the reproductive
precautions as outlined in the Informed Consent form.
3) Positive urine pregnancy test (women only)
4) Subjects who are pregnant or breast-feeding.
5) Inability to take oral medications.
6) Subjects who have clinically significant allergic reactions to tolvaptan or chemically related structures such as benzazepines (benzazepril,
conivaptan, fenoldopam mesylate or mirtazapine).
7) Subjects having disorders in thirst recognition or inability to access fluids.
8) Subjects with critical electrolyte imbalances, as determined by the investigator.
9) Subjects with or at risk of significant hypovolemia, as determined by investigator.
10)Subjects with clinically significant anemia, as determined by investigator.
11)Subjects with a history of substance abuse (within the last 3 years).
12)Subjects taking other experimental (ie, non-marketed) therapies or current participation in another clinical drug or device trial. Current
participation in the off-drug follow up period of another ADPKD trial with tolvaptan is permitted.
Efficacy Analysis Exclusion Criteria
13)Subjects having contraindications to, or interferance with MRI assessments (eg, ferro-magnetic prostheses, ancurysm clips, severe
claustrophobia).
14)Subjects with a history of taking a vasopressin antagonist, outside of
previous participation in a tolvaptan trial.
15) Subjects with a history of persistant non-compliance with antihypertensive or other important medical therapy.
16)Subjects taking medications or having concomitant illnesses likely to confound endpoint
assessments, including taking approved (ie, marketed) therapies for the purpose of affecting PKD cysts such as tolvaptan, vasopressin
antagonists, anti-sense RNA therapies, rapamycin, sirolimus, everolimus, or somatostatin analogs (ie, octreotide, sandostatin), and cyst reduction surgery.
17)Subjects with advanced diabetes (ie, those with poor glycemic control evidenced by a history of severly elevated hemoglobin AIC, or
with evidence of advanced retinpathy, nephropathy or peripheral vascular disease due to micro-or-macro vascular disease). |
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E.5 End points |
E.5.1 | Primary end point(s) |
In subjects randomized to tolvaptan and placebo in 156-04-251 and enrolled and treated in 156-08-271 as early treated and delayed treated groups:
• Change from the 156-04-251 baseline in TKV at Month 24 of 156-08-271
Percent change from 156-04-251 baseline in Total kidney volume (TKV) at Month 24 in trial 156-08-271 as compared to the percent change in TKV at 156-04-251 Month 36 measured by magnetic resonance imaging (MRI)
then
Change in renal function (100x1/Serum Creatinine mg/dl) at Month 24 in trial 156-08-27) as compared to change in renal function at Month 36 in protocol 156-08-251, both relative to 156-04-251 end of titration baseline. |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
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E.5.2 | Secondary end point(s) |
In subjects randomized to tolvaptan and placebo in 156-04-251 and enrolled and treated in 156-08-271 as early treated and
delayed treated groups:
• Change from the 156-04-251 baseline in eGFR
(Chronic Kidney Disease Epidemiology Collaboration [CKD-EPI]) at Month 24 of 156-08-271
• Slope of TKV of the 156-08-271 study
• Slope of eGFR (CKD-EPI) of the 156-08-271 study
Other Secondary Efficacy Endpoints:
In prior placebo subjects enrolling from protocol 156-04-251:
• Rate of change in annual TKV slope when crossing over from placebo to tolvaptan treatment
• Rate of change in annual slope of renal function (eGFR CKD-EPI) when
crossing over from placebo totolvaptan treatment
For all subjects enrolled in this trial:
• Change from baseline in TKV by exposure group
• Change from end of titration in renal function (eGFRCKD-EPI) by exposure group
• For subjects who are taking anti-hypertensive therapy at Baseline in this trial, percentage with clinically sustained decreases of blood
pressure (BP) leading to a sustained reduction in anti-hypertensive therapy compared to Baseline (while taking investigational product) at
Months 12 and 24 for hypertensive subjects. |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | No |
E.6.3 | Therapy | No |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | Yes |
E.6.7 | Pharmacodynamic | Yes |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | No |
E.7.3 | Therapeutic confirmatory (Phase III) | Yes |
E.7.4 | Therapeutic use (Phase IV) | No |
E.8 Design of the trial |
E.8.1 | Controlled | No |
E.8.1.1 | Randomised | No |
E.8.1.2 | Open | Yes |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | No |
E.8.1.5 | Parallel group | No |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | Information not present in EudraCT |
E.8.2.2 | Placebo | Information not present in EudraCT |
E.8.2.3 | Other | Information not present in EudraCT |
E.8.2.4 | Number of treatment arms in the trial | 3 |
E.8.3 |
The trial involves single site in the Member State concerned
| No |
E.8.4 | The trial involves multiple sites in the Member State concerned | Yes |
E.8.4.1 | Number of sites anticipated in Member State concerned | 2 |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 80 |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | Yes |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned |
Afghanistan |
Belgium |
Canada |
France |
Germany |
Italy |
Netherlands |
Poland |
Romania |
Russian Federation |
United Kingdom |
United States |
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E.8.7 | Trial has a data monitoring committee | Yes |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
|
Please refer to the protocol |
|
E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 5 |
E.8.9.1 | In the Member State concerned months | 0 |
E.8.9.1 | In the Member State concerned days | 0 |
E.8.9.2 | In all countries concerned by the trial years | 5 |
E.8.9.2 | In all countries concerned by the trial months | 0 |
E.8.9.2 | In all countries concerned by the trial days | 0 |