Clinical Trial: Permeability Factor in Focal Segmental Glomerulosclerosis

Study Status: Completed
Recruit Status: Completed
Study Type: Interventional



Official Title: Permeability Factor in Focal Segmental Glomerulosclerosis

Brief Summary:

Focal segmental glomerulosclerosis (FSGS) is a renal syndrome characterized by proteinuria (usually nephrotic range), limited response to conventional therapy, and a poor renal prognosis, with progression to end stage renal failure in at least 50% of patients. As a syndrome, FSGS likely has many specific etiologies, only a few of which are well-defined. Recently, it has been suggested that some idiopathic FSGS patients have elevated circulating levels of a protein that induces glomerular permeability in vitro and in vivo. While there has been no consistent term for this factor, it will be termed here FSGS permeability factor (FPF).

The purposes of the present study are five fold:

  1. To identify a population of FSGS patients with elevated FPF levels
  2. To examine RNA expression profiles of peripheral blood mononuclear cells (PBMC) in FSGS patients with elevated FPF levels
  3. To define the kinetics of FPF disappearance and reappearance in FSGS patients receiving immunomodulatory therapy and in the case of patients with recurrent FSGS following renal transplant, those receiving plasma exchange
  4. To identify immunosuppressive agents which are successful in inducing sustained reduction in FPF levels
  5. To determine in patients with FSGS who are awaiting renal transplant, whether sustained reduction in FPF levels is associated with reduced risk of recurrent FSGS.

Patient participation is divided into an evaluation phase, in which FPF levels, RNA expression profiles, and patient eligibility for participation in treatment protocols are determined, and a treatment phase in which specific immunomodulatory therapy is intro