Novel therapies for resistant focal segmental glomerulosclerosis (FONT) phase II clinical trial: study design

Howard Trachtman1, Suzanne Vento, Debbie Gipson

  • 1Cohen Children's Medical Center of New York, North Shore Long Island Jewish Health System, New Hyde Park, NY, USA. trachtma@lij.edu

BMC Nephrology
|February 12, 2011
PubMed
Abstract

Insights

This study introduces a flexible Phase II trial design to identify effective antifibrotic therapies for focal segmental glomerulosclerosis (FSGS). The Novel Therapies for Resistant Focal Segmental Glomerulosclerosis (FONT) project aims to find promising treatments for future Phase III trials.

Area of Science:

  • Nephrology
  • Clinical Trial Design
  • Pharmacology

Background:

  • Primary focal segmental glomerulosclerosis (FSGS) lacks sufficient randomized clinical trials (RCTs) for novel therapies, particularly for corticosteroid-resistant cases.
  • Advances in basic science offer new antifibrotic strategies targeting fibrosis pathways relevant to FSGS progression.
  • There is a critical need for adaptable Phase II study designs to evaluate these novel antifibrotic agents.

Purpose of the Study:

  • To investigate the efficacy of novel therapies for resistant FSGS using a multicenter Phase I/II RCT.
  • To identify agents with superior response rates for further evaluation in Phase III trials.
  • To efficiently select promising treatments and exclude ineffective ones for FSGS management.

Main Methods:

  • The Novel Therapies for Resistant Focal Segmental Glomerulosclerosis (FONT) project is a multicenter Phase I/II RCT.
  • Adalimumab and galactose will be compared against a conservative therapy (lisinopril, losartan, atorvastatin).
  • A two-step outcome analysis will be employed to expedite the selection of agents for Phase III testing.

Main Results:

  • The study is designed to have high probability of selecting a superior treatment if one exists.
  • Comparison of primary and secondary endpoints across study arms will guide the choice of treatments for future Phase III RCTs.
  • The sample size is calculated to ensure statistical power for treatment selection.

Conclusions:

  • The FONT II RCT utilizes a two-step outcome analysis to accelerate the identification of effective FSGS therapies.
  • This phased approach efficiently identifies promising agents for Phase III testing while discarding ineffective ones.
  • The study design aims to prevent significant investment in non-efficacious treatments for rare kidney diseases like FSGS.

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