dRTA is characterized by impaired ability of the kidney to secrete protons (acids) into the urine, giving rise to an imbalance of blood pH that can lead to severe and long-term complications. These include kidney damage, growth retardation and rickets in children, a series of metabolic disorders or impairment of renal function.
There are currently no approved treatments for dRTA.
Designed for a twice-a-day treatment
In Europe, ADV7103 has shown positive results in a pivotal Phase III (ARENA-1) study in children and adults with dRTA. The objective of this study was to evaluate the efficacy, safety and acceptability of ADV7103, which was shown to remove the main biological defects observed with the disease and to successfully meet primary and secondary endpoints.
Normal blood bicarbonate levels were attained in most patients treated with doses of ADV7103 ranging from 0.75 to 8.45 mEq/kg/day. Non-inferiority of ADV7103 relative to the standard of care or baseline literature data was consistently demonstrated (per protocol, intention-to-treat, as well as sensitivity analyses). Additionally, kalaemia was normalized with only two doses of ADV7103 per day.
Preliminary results of the Phase III extension study, an open-label clinical trial, confirm the efficacy and safety of ADV7103 after 24 months of treatment. Results from 90% of patients at 6 months, 12 months, 18 months and 24 months demonstrate the ability of ADV7103 to normalize biological disorders caused by dRTA throughout the course of treatment. This efficacy, measured by blood bicarbonate levels and stabilized serum potassium, remains constant in about 80% of patients.
In June 2017, ADV7103 was granted Orphan Drug Designation for the treatment of dRTA by the EU.
In the United States, the US Food and Drug Administration (FDA) has cleared ADV7103’s Investigational New Drug (IND) application, allowing the initiation of the pivotal Phase III (ARENA-2) trial for the treatment of dRTA.
The trial, a prospective, multicenter, randomized, double-blinded, placebo-controlled study, is expected to enroll approximately 40 patients in the United States. Its primary objective is to evaluate the safety and efficacy of ADV7103 versus placebo in preventing the development of metabolic acidosis defined by serum bicarbonate level in pediatric (6 months to < 18 years of age) and adult (18 to 65 years of age) subjects with primary dRTA, the disease’s inherited form.
The study has also received a No Objection Letter (NOL) from Health Canada’s Office of Clinical Trials to extend the Phase III trial in Canada.
ADV7103 is an investigational drug and has not yet been approved by any regulatory authority.
ADV7103 has received authorization from the French National Agency of Medicine and Health Products Safety (ANSM) and from the Belgian Health Authority (FAMHP) to initiate a pivotal Phase II/III clinical trial in cystinuria (CORAL study).
The trial has been designed to evaluate the efficacy, safety, tolerance and compliance of ADV7103 in patients living with cystinuria.
Since its founding in 2007, Advicenne has been dedicated to developing and commercializing innovative treatments that address unmet medical needs in the area of nephrology. Our lead drug candidate, ADV7103, is in late-stage clinical trials for two indications: distal renal tubular acidosis (dRTA) and cystinuria. Listed on both the Euronext Paris and Euronext Brussels stock exchanges, the company is headquartered in Nîmes, France.
© 2020 Advicenne