Study for patients with Primary Hyperoxaluria and Severe Renal Impairment to evaluate the efficacy, safety and tolerability of DCR-PHXC

Phase 1

• Conditions: Primary Hyperoxaluria; MedDRA version: 20.1Level: PTClassification code 10020703Term: HyperoxaluriaSystem Organ Class: 10038359 - Renal and urinary disorders; Therapeutic area: Diseases [C] - Nutritional and Metabolic Diseases [C18]

• Registration Number: EUCTR2020-002826-97-FR
• Lead Sponsor: Dicerna Pharmaceuticals Inc

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2020-09-30
• Last Update Posted: 5 April 2021

Recruitment & Eligibility

• Status: ot Recruiting
• Sex: All
• Target Recruitment: 24

Inclusion Criteria

In order to be eligible to participate in this study, an individual must meet all of the following criteria:
Age
1. Four age groups of participants will be enrolled, in sequence:
a. adults and adolescents (aged = 12 years; 6 participants)
b. children 6 to 11 years of age (2 participants)
c. children 2 to 5 years of age (2 participants) and
d. infants and newborns from birth to < 2 years of age (2 participants).
Type of Participant and Disease Characteristics
2. Documented diagnosis of PH1 or PH2, confirmed by genotyping (historically available genotype information is acceptable for study eligibility)
3. Estimated GFR at Screening < 30 mL/min normalized to 1.73 m2 BSA. See Section 8.2.6.2 for equations. For infants aged less than 12 months, serum creatinine above the 97th percentile of a healthy population (Boer et al., 2010)
4. Plasma oxalate > 30 µmol/L
5. For participants receiving hemodialysis or peritoneal dialysis, total duration of hemodialysis or peritoneal dialysis must be less than 18 months.
Sex
6. Male or female
Male participants:
A male participant with a female partner of childbearing potential must agree to use contraception, as detailed in Section 10.4.2, during the treatment period and for at least 12 weeks after the last dose of study intervention and refrain from donating sperm during this period.
Female participants:
A female participant is eligible to participate if she is not pregnant (see Section 10.4.3), not breastfeeding, and at least one of the following conditions applies:
Not a woman of childbearing potential (WOCBP) as defined in Section 10.4.1.1.
OR
A WOCBP who agrees to follow the contraceptive guidance in Section 10.4.2.2 for the 4 weeks prior to randomization, during the treatment period, and for at least 12 weeks after the last dose of study intervention and agrees to refrain from harvesting/freezing eggs during this period.
Contraceptive use by men or women should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies.
Informed Consent/Assent
7. Participant (and/or participant’s parent or legal guardian if participant is a minor [defined as patient < 18 years of age, or younger than the age of majority according to local regulations]) is capable of giving signed informed consent, which includes compliance with the requirements and restrictions listed in the informed consent form (ICF) and in this protocol.
a. Adolescents (12 to < 18 years of age, or older than 12 years but younger than the age of majority according to local regulations) must be able to provide written assent for participation.
b. For children younger than 12 years of age, assent will be based on local regulations.
Are the trial subjects under 18? yes
Number of subjects for this age range: 16
F.1.2 Adults (18-64 years) yes
F.1.2.1 Number of subjects for this age range 6
F.1.3 Elderly (>=65 years) yes
F.1.3.1 Number of subjects for this age range 2

Exclusion Criteria

An individual who meets any of the following criteria will be excluded from participation in this study:
Medical Conditions
1. Prior hepatic transplantation; or scheduled transplantation within 6 months of Day 1. Prior renal transplantation is allowed.
2. Documented evidence of severe systemic oxalosis, defined as overt signs of bone oxalate deposition in a plain x-ray of the left hand, as evidenced by large diffuse metaphyseal bands
3. Presence of any condition or comorbidities that would interfere with study compliance or data interpretation or potentially impact patient safety including, but not restricted to:
a. Severe intercurrent illness
b. Known causes of active liver disease/injury (e.g., alcoholic liver disease, nonalcoholic fatty liver disease/steatohepatitis)
c. Physician concerns about intake of drugs of abuse or excessive alcohol intake, or history of excessive alcohol intake in the 2 years prior to enrollment (defined as = 21 units of alcohol per week in men and = 14 units of alcohol per week in women; where a unit” of alcohol is equivalent to a 12-ounce beer, 4-ounce glass of wine, or 1-ounce shot of hard liquor)
Prior/Concomitant Therapy
4. Routine or chronic use of more than 3 grams of acetaminophen/paracetamol daily
5. Use of an RNAi drug, other than DCR-PHXC, within the last 6 months
6. History of one or more of the following reactions to an oligonucleotide-based therapy:
a. Severe thrombocytopenia (platelet count = 100,000/µL)
b. Hepatotoxicity, defined as alanine transaminase (ALT) or aspartate transaminase (AST) > 3 times the upper limit of normal (ULN) and total bilirubin > 2 × ULN or international normalized ratio (INR) >1.5
c. Severe flu-like symptoms leading to discontinuation of therapy
d. Localized skin reaction from the injection (graded severe) leading to discontinuation of therapy
e. Coagulopathy/clinically significant prolongation of clotting time
Prior/Concurrent Clinical Study Experience
7. Participation in any clinical study in which they received an investigational medicinal product (IMP) other than DCR-PHXC within 4 months before Screening.
Diagnostic Assessments
8. Liver function test abnormalities: ALT and/or AST >1.5 × ULN for age and gender
9. Positive anti-double-stranded deoxyribonucleic acid (anti-dsDNA) antibody test at Screening
Other Exclusions
10. Known hypersensitivity to DCR-PHXC or any of its ingredients
11. Inability or unwillingness to comply with the specified study procedures, including the lifestyle considerations detailed in Section 5.3.

Study & Design

• Study Type: Interventional clinical trial of medicinal product
• Study Design: Not specified