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A study conduct in several centres Evaluating the Continued Safety and Efficacy of ADV7103 in Subjects With Primary Distal Renal Tubular Acidosis

A Phase 3b Open-Label Extension of Study B23CS (ARENA 2) Evaluating the Continued Safety and Efficacy of ADV7103 in Subjects With Primary Distal Renal Tubular Acidosis (ARENA 2 Open-label Extension Study) - ARENA 2 Open-label Extension Study

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTR
Registry ID
EUCTR2018-004418-16-DE
Enrollment
40
Registered
2019-09-11
Start date
Unknown
Completion date
Unknown
Last updated
2020-05-04

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Distal renal tubular acidosis MedDRA version: 21.1 Level: PT Classification code 10038535 Term: Renal tubular acidosis System Organ Class: 10038359 - Renal and urinary disorders

Interventions

Product Code: ADV7103-8mEq Pharmaceutical Form: Prolonged-release granules INN or Proposed INN: potassium citrate anhydrous CAS Number: 6100-05-6 Other descriptive name: potassium citrate
tripotassium citrate Concentration unit: mg milligram(s) Concentration type: equal Concentration number: 267- INN or Proposed INN: potassium hydrogen carbonate CAS Number: 298-14-6 Other descriptive n
tripotassium citrate Concentration unit: mg milligram(s) Concentration type: equal Concentration number: 800- INN or Proposed INN: potassium hydrogen carbonate CAS Number: 298-14-6 Other descriptive n

Sponsors

Advicenne SA
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Inclusion criteria for subjects who did not participate in Study B23CS: 1. Female or male subjects = 65 years of age at time of consent with the following stipulations: a. Subjects = 6 months of age must reside in Europe b. Subjects 6 months and 5.5 and serum bicarbonate > 18 mEq/L for subjects = 4 years old or > 17 mEq/L for subjects =65 years) yes F.1.3.1 Number of subjects for this age range 3

Exclusion criteria

Exclusion criteria: Exclusion criteria for subjects who did not participate in Study B23CS: 1. Female subject who is pregnant or lactating or has plans for pregnancy during the study; 2. Subject has evidence of proximal tubule dysfunction (eg, hypophosphatemia, low serum uric acid, glycosuria, or amino aciduria) unless the subject is 1.5x upper limit of normal (ULN) b. Serum potassium > 5.0 mEq/L or hypokalemia accompanied by clinical symptoms (eg, muscle cramps) or significant ECG changes (eg, T wave depression, U wave elevation) c. Estimated glomerular filtration rate (eGFR) ULN, except with known Gilbert's disease. 7. Subject has been hospitalized or had outpatient surgery (other than minor skin and dRTA disease-related procedures or ear tube placement) in the past 6 months or is planning surgery in the next 6 months; 8. In the opinion of the Investigator, the subject has a major medical or psychiatric condition (eg, significant cardiac disease, schizophrenia) or an unstable condition (eg, uncontrolled hypertension, asthma, diabetes, hypercholesterolemia, or cardiac disease) that would potentially interfere with the subject safely completing the study; 9. In the opinion of the Investigator, the subject has a history of difficulty taking oral medication and/or conditions that may hamper absorption of the study product (eg, any difficulty of swallowing, malabsorption, delayed gastric emptying, esophageal compression, intestinal obstruction, or other chronic gastrointestinal disease); 10. Self-reported or parent/guardian reported alcohol abuse or drug abuse within the past 12 months; 11. Subject is a solid organ or bone marrow transplant recipient; 12. Subject has a history of malignancy within 5 years prior to the screening visit, except for localized skin or cervical carcinoma; or 13. Subject is known to have an allergy to any ADV7103 constituents.

Design outcomes

Primary

MeasureTime frame
Main Objective: To evaluate the long term safety and tolerability of ADV7103 in subjects with primary distal renal tubular acidosis (dRTA).;Secondary Objective: •Evaluate the long term efficacy of ADV7103 in maintaining targeted serum bicarbonate levels and preventing metabolic acidosis in dRTA subjects; •Evaluate the long term efficacy of ADV7103 in maintaining targeted serum potassium levels in dRTA subjects; •Evaluate the effects of ADV7103 on hypocitraturia; •Evaluate the effects of ADV7103 on hypercalciuria.;Primary end point(s): Number/proportion of subjects presenting with ADV7103 treatment related adverse events (AEs) during the study, by severity grade.;Timepoint(s) of evaluation of this end point: 36 months

Secondary

MeasureTime frame
Secondary end point(s): • Number/proportion of subjects with serum bicarbonate levels in the normal range for age during = 80% of study encounters (study visits and remote interactions); • Number/proportion of subjects with serum potassium levels in the normal range for age during = 80% of study encounters (study visits and remote interactions); • Number/proportion of subjects with a serum potassium level 8.5 • Number/proportion of subjects with positive crystalluria • Number/proportion of subjects adherent to prescribed ADV7103 treatment: less than 50%, at least 50%, at least 75%, at least 90%, and more than 110%, of the time (based ADV7103 accountability data coupled with ADV7103 paper dosing diary data). ;Timepoint(s) of evaluation of this end point: 36 months

Countries

Canada, Germany, United States

Contacts

Public ContactClinical & regulatory affairs

Advicenne SA

CGUITTET@advicenne.com+33 (0)4 66 05 54 23

Outcome results

None listed

Source: EU CTR (via WHO ICTRP) · Data processed: Feb 4, 2026