Efficacy, tolerability, and safety of the oral phosphate binder VS-505 (AP301)

© The Author(s) 2024. Published by Oxford University Press on behalf of the ERA..

BACKGROUND: VS-505 (AP301), an acacia and ferric oxyhydroxide polymer, is a novel fiber-iron-based phosphate binder. This two-part phase 2 study evaluated the tolerability, safety, and efficacy of oral VS-505 administered three times daily with meals in treating hyperphosphatemia in chronic kidney disease (CKD) patients receiving maintenance hemodialysis (MHD).

METHODS: In Part 1, patients received dose-escalated treatment with VS-505 2.25, 4.50, and 9.00 g/day for 2 weeks each, guided by serum phosphorus levels. In Part 2, patients received randomized, open-label, fixed-dosage treatment with VS-505 (1.50, 2.25, 4.50, or 6.75 g/day) or sevelamer carbonate 4.80 g/day for 6 weeks. The primary efficacy endpoint was the change in serum phosphorus.

RESULTS: The study enrolled 158 patients (Part 1: 25; Part 2: 133), with 130 exposed to VS-505 in total. VS-505 was well tolerated. The most common adverse events were gastrointestinal disorders, mainly feces discolored (56%) and diarrhea (15%; generally during weeks 1‒2 of treatment). Most gastrointestinal disorders resolved without intervention, and none were serious. In Part 1, serum phosphorus significantly improved (mean change -2.0 mg/dL; 95% confidence interval -2.7, -1.4) after VS-505 dose escalation. In Part 2, serum phosphorus significantly and dose-dependently improved in all VS-505 arms, with clinically meaningful reductions with VS-505 4.50 and 6.75 g/day, and sevelamer carbonate 4.80 g/day (mean change -1.6 (-2.2, -1.0), -1.8 (-2.4, -1.2), and -1.4 (-2.2, -0.5) mg/dL, respectively). In both Parts, serum phosphorus reductions occurred within 1 week of VS-505 initiation, returning to baseline within 2 weeks of VS-505 discontinuation.

CONCLUSION: VS-505, a novel phosphate binder, was well tolerated with a manageable safety profile, and effectively and dose-dependently reduced serum phosphorus in CKD patients with hyperphosphatemia receiving MHD. Clinical Trial registration number: NCT04551300.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - year:2024

Enthalten in:

Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association - (2024) vom: 07. März

Sprache:

Englisch

Beteiligte Personen:

Zhuang, Bing [VerfasserIn]
Gan, Liangying [VerfasserIn]
Liu, Bin [VerfasserIn]
Yuan, Weijie [VerfasserIn]
Shi, Ming [VerfasserIn]
Peng, Ai [VerfasserIn]
Wang, Lihua [VerfasserIn]
Chen, Xiaolan [VerfasserIn]
Liu, Tongqiang [VerfasserIn]
Zhang, Shiying [VerfasserIn]
Wang, Song [VerfasserIn]
Gao, Qing [VerfasserIn]
Wang, Baoxing [VerfasserIn]
Zheng, Huixiao [VerfasserIn]
Liu, Changhua [VerfasserIn]
Luo, Yuan [VerfasserIn]
Ye, Hong [VerfasserIn]
Lin, Hongli [VerfasserIn]
Li, Yiwen [VerfasserIn]
He, Qiang [VerfasserIn]
Zheng, Feng [VerfasserIn]
Luo, Ping [VerfasserIn]
Long, Gang [VerfasserIn]
Lu, Wei [VerfasserIn]
Li, Kanghui [VerfasserIn]
Yang, Junwei [VerfasserIn]
Liu, Yingxue Cathy [VerfasserIn]
Zhang, Zhizheng [VerfasserIn]
Li, Xiaolin [VerfasserIn]
Zhang, Weifeng [VerfasserIn]
Zuo, Li [VerfasserIn]

Links:

Volltext

Themen:

Clinical study
Hemodialysis
Hyperphosphatemia
Journal Article
Phosphate binder
VS-505

Anmerkungen:

Date Revised 07.03.2024

published: Print-Electronic

ClinicalTrials.gov: NCT04551300

Citation Status Publisher

doi:

10.1093/ndt/gfae053

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM369431782