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A form of focal segmental glomerulosclerosis without identifiable etiology. Primary (idiopathic) FSGS has been associated with the presence of circulating permeability factors/cytokines, which cause foot process effacement and proteinuria.
Biomarker and diagnostic research for primary focal segmental glomerulosclerosis has been reported in the published literature.
No approved treatments are currently available for primary focal segmental glomerulosclerosis. An additional 1 compound holds orphan drug designation.
While no drugs are FDA-approved specifically for primary focal segmental glomerulosclerosis, some of the following designated compounds may be used off-label in clinical practice. Treatment decisions should be made in consultation with a specialist familiar with this condition.
The following drugs have received orphan drug designation from the FDA for primary focal segmental glomerulosclerosis. Orphan designation reflects regulatory interest and does not indicate approval for treatment.
Brand Name | Generic Name | Sponsor |
|---|
8 clinical trials registered, 6 recruiting. Interventions under study include drug therapy, medical devices, and other interventions. Pipeline includes 2 PHASE3, 3 PHASE2, 2 NA. Research is sponsored by a mix of industry and academic institutions.
NCT ID | Title | Phase | Sponsor | Status |
|---|---|---|---|---|
[NCT06315504](https://clinicaltrials.gov/study/NCT06315504) |
Data assembled from 4 of 12 sources · Last updated Sep 19, 2026, 4:30 PM UTC
Designated
Exclusivity End |
|---|
Designation Status |
|---|
fresolimumab | fresolimumab | Genzyme, a Sanofi Company | 2010 | — | Withdrawn |
Gene therapy approaches for primary focal segmental glomerulosclerosis have been reported in the published literature.
8 trials found
Circulating Factors in Nephrotic Syndrome |
— |
Iain Bressendorff |
NOT_YET_RECRUITING |
[NCT02235857](https://clinicaltrials.gov/study/NCT02235857) | Post Approval Study of Liposorber LA-15 System for the Treatment of Focal Segmental Glomerulosclerosis in Children | NA | Kaneka Medical America LLC | RECRUITING |
[NCT06466135](https://clinicaltrials.gov/study/NCT06466135) | Study of WAL0921 in Patients With Glomerular Kidney Diseases | PHASE2 | Walden Biosciences | RECRUITING |
[NCT06500702](https://clinicaltrials.gov/study/NCT06500702) | A Study to Evaluate the Efficacy and Safety of Frexalimab, Brivekimig, or Rilzabrutinib in Participants Aged 16 to 75 Years With Primary Focal Segmental Glomerulosclerosis or Minimal Change Disease | PHASE2 | Sanofi | RECRUITING |
[NCT04065438](https://clinicaltrials.gov/study/NCT04065438) | Post Approval Study for Treatment of Drug-resistant Adult and Pediatric Primary FSGS Using the LIPOSORBER® LA-15 System | NA | Kaneka Medical America LLC | RECRUITING |
53 publications have been identified in PubMed for primary focal segmental glomerulosclerosis. Research spans Basic Science / Preclinical (23%), Case Report / Case Series (19%), and Epidemiology / Natural History (19%).
Research Type | Count | % of Total |
|---|---|---|
Laboratory research | 12 | 23% |
Patient case studies | 10 | 19% |
Disease patterns and progression | 10 | 19% |
Clinical study results | 9 | 17% |
Research summaries | 7 | 13% |
Testing and diagnosis research | 4 | 8% |
New treatment approaches | 1 | 2% |
Miao J (2026). [PMID: 41908608](https://pubmed.ncbi.nlm.nih.gov/41908608/). *Kidney Med*. [Clinical Trial Publication]
Lu L (2026). [PMID: 41506446](https://pubmed.ncbi.nlm.nih.gov/41506446/). *Translational research : the journal of laboratory and clinical medicine*. [Basic Science / Preclinical]
Wang J (2026). [PMID: 41518631](https://pubmed.ncbi.nlm.nih.gov/41518631/). *Nephron*. [Review / Meta-Analysis]
Xi Y (2026). [PMID: 42110433](https://pubmed.ncbi.nlm.nih.gov/42110433/). *Front Med (Lausanne)*. [Clinical Trial Publication]
Verhellen C (2026). [PMID: 42164636](https://pubmed.ncbi.nlm.nih.gov/42164636/). *Kidney Int Rep*. [Review / Meta-Analysis]
Nuccitelli R (2026). [PMID: 41659865](https://pubmed.ncbi.nlm.nih.gov/41659865/). *Frontiers in immunology*. [Review / Meta-Analysis]
You H (2026). [PMID: 41456713](https://pubmed.ncbi.nlm.nih.gov/41456713/). *Laboratory investigation; a journal of technical methods and pathology*. [Diagnostic / Biomarker]
Agrawal G (2025). [PMID: 40625481](https://pubmed.ncbi.nlm.nih.gov/40625481/). *Cureus*. [Epidemiology / Natural History]
Szklarzewicz J (2025). [PMID: 40216703](https://pubmed.ncbi.nlm.nih.gov/40216703/). *Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation*. [Epidemiology / Natural History]
Casiraghi F (2025). [PMID: 40254357](https://pubmed.ncbi.nlm.nih.gov/40254357/). *Kidney international*. [Clinical Trial Publication]