Effect of Galactose on Permeability Factor in Patients With Focal Segmental Glomerulosclerosis (FSGS)and Chronic Kidney Disease Stage 5

Patients with resistant FSGS have persistent proteinuria and a high risk of progression to end stage kidney disease (ESKD). A circulating factor that increases glomerular permeability to albumin (Palb) has been detected in over 50% of these patients. While the molecular identity of the factor has not been fully established, in vitro studies and limited clinical experience suggest that galactose can reduce the level of the FSGS permeability factor.

This study is a pilot study to determine if oral administration of galactose can lower the circulating level of the FSGS permeability factor.

Five patients with biopsy proven primary FSGS - native or transplant kidney, receiving plasmapheresis - who are resistant to steroids and one other immunosuppressive agents will be studied.

The only eligibility factor is presence of the FSGS permeability factor.

The experimental intervention is administration of galactose, orally, 0.2 g/kg body weight/dose twice daily. the duration of treatment will be 28 days,.