E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Autosomal Dominant Polycystic Kidney Disease (ADPKD) |
|
E.1.1.1 | Medical condition in easily understood language |
ADPKD is an inherited condition (passed from ones parents) that causes cysts (fluid filled sacs) to develop on the kidneys. It causes the kidneys to get bigger over time and for the kidneys to fail. |
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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 | 18.1 |
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 |
|
E.1.3 | Condition being studied is a rare disease | Yes |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
To compare the efficacy of tolvaptan treatment in
reducing the change in estimated glomerular filtration rate
(eGFR) from pre-treatment baseline to post-treatment followup,
as compared with placebo, in subjects with late-stage
chronic kidney disease (CKD) due to ADPKD who tolerate
tolvaptan during an initial run-in period. |
|
E.2.2 | Secondary objectives of the trial |
To compare the efficacy of tolvaptan treatment in
reducing the decline of annualized eGFR slope, as compared
with placebo, in subjects with late-stage CKD due to ADPKD
who tolerate tolvaptan during an initial run-in period.
To compare overall and hepatic safety of tolvaptan with
placebo and to compare incidence of ADPKD complications
(outcomes) during the trial. |
|
E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
1. Male and female subjects age 18 to 55 years of age (inclusive) with eGFR between 25 and 65
mL/min/1.73m2 -OR-
2. Male and female subjects age 56 to < 66 years of age with eGFR between 25 and
44 mL/min/1.73m2 (with evidence of ADPKD progression, ie, eGFR decline of >2.0 mL/min/1.73 m2 per year, besed on historical eGFR data and medical monitor discretion).
3. Male and female subjects who are tolvaptan naïve.
4. Diagnosis of ADPKD by modified Pei-Ravine criteria18 19:
With family history: several cysts per kidney (3 if by sonography, 5 if by CT or MRI)
Without family history: 10 cysts per kidney (by any radiologic method, above) and exclusion
of other cystic kidney diseases. Conditions to be excluded include: multiple simple renal
cysts, renal tubular acidosis, cystic dysplasia of the kidney, multicystic kidney, multilocular
cysts of the kidney, medullary cystic kidney and acquired cystic disease of the kidney.
Distribution and number of cysts consistent with the observed level of renal function deficit |
|
E.4 | Principal exclusion criteria |
1. Women of childbearing potential (WOCBP) who do not agree to practice 2 different methods of
birth control or remain abstinent during the trial and for 30 days after the last dose of IMP. If
employing birth control, 2 of the following precautions must be used: vasectomy of partner, tubal
ligation, vaginal diaphragm, intrauterine device, birth control pill, birth control implant, birth
control depot injection, condom, or sponge with spermicide.
2. Women who are breast-feeding and/or who have a positive pregnancy test result prior to receiving
IMP.
3. Need for chronic diuretic use.
4. Hepatic impairment or liver function abnormalities other than that expected for ADPKD with
typical cystic liver disease during the pre-randomization period.
5. Subjects with advanced diabetes (eg, glycosylated hemoglobin [HgbA1c] > 7.5, and/or glycosuria
by dipstick, significant proteinuria, retinopathy), evidence of additional significant renal
disease(s) (ie, currently active glomerular nephritidies), renal cancer, single kidney, or recent
(within last 6 months) renal surgery or acute kidney injury.
6. Subjects with contraindications to required trial assessments.
7. Subjects who, in the opinion of the trial investigator or medical monitor, have a medical history or
medical findings inconsistent with safety or compliance with trial assessments. |
|
E.5 End points |
E.5.1 | Primary end point(s) |
Treatment difference in the change of eGFR from pre-treatment baseline to posttreatment
follow-up, annualized (divided) by each subject’s IMP treatment duration. |
|
E.5.1.1 | Timepoint(s) of evaluation of this end point |
Throughout study up to the Follow up period (3 week post treatment end). The eGFR values will be calculated from the central-laboratory serum creatinine concentrations taken at screening and during every trial visit including follow up visit. |
|
E.5.2 | Secondary end point(s) |
Key Secondary Efficacy Endpoint
Treatment difference in annualized slope of eGFR calculated for individual subjects using an appropriate baseline and available, post-randomization, on-treatment assessments.
Safety Endpoints
Safety endpoints to be analyzed will include a descriptive summary of:
1) AEs
2) Vital signs
3) Clinical laboratory tests, including serum transaminases, BT, ALP, and serum sodium
Pharmacokinetic/Pharmacodynamic Endpoints
PK Endpoints: Determination of plasma tolvaptan and metabolite(s), including DM-4103 concentrations.
PD Endpoints: Uosm and urine specific gravity
|
|
E.5.2.1 | Timepoint(s) of evaluation of this end point |
Efficacy and Safety endpoints will be assessed throughout study up to
and including the Follow up period (3 week post treatment end).
PK endpoint assessed:
End of the tolvaptan run-in period (Day -1)
During the double-blind, randomized treatment period at Months 3, 6, 9,
12/EoTx,
At the last follow-up visit
PD endpoint assessed:
second visit of the screening period
end of the placebo run-in period (Day -36)
end of the tolvaptan titration period (Day -22)
end of the tolvaptan run-in period (Day -1)
during the double-blind, randomized treatment period at Months 3, 6, 9,
and 12/EoTx
at the last follow-up visit. |
|
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 | Yes |
E.8.1.1 | Randomised | Yes |
E.8.1.2 | Open | No |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | Yes |
E.8.1.5 | Parallel group | Yes |
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) | No |
E.8.2.2 | Placebo | Yes |
E.8.2.3 | Other | No |
E.8.2.4 | Number of treatment arms in the trial | 2 |
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 | 6 |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 81 |
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 |
Argentina |
Australia |
Belgium |
Brazil |
Canada |
Chile |
Colombia |
Czech Republic |
Denmark |
France |
Germany |
Hungary |
Israel |
Italy |
Korea, Republic of |
Malaysia |
Mexico |
Netherlands |
Norway |
Peru |
Poland |
Romania |
Russian Federation |
South Africa |
Spain |
Sweden |
Switzerland |
Taiwan |
Turkey |
United Kingdom |
United States |
|
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
|
The end of trial date is defined as the last date of last contact with the subject. |
|
E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 2 |
E.8.9.1 | In the Member State concerned months | 6 |
E.8.9.1 | In the Member State concerned days | |
E.8.9.2 | In all countries concerned by the trial years | 2 |
E.8.9.2 | In all countries concerned by the trial months | 6 |