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Sefaxersen

Phase 3

Primary IgA Nephropathy | RNA therapy | Nephrology |Roche Holding AG|Trials Updated: Oct 5, 2026

Sefaxersen development status

Highest phase Phase 3
Registered trials 1 across 1 sponsor since Apr 2023

Sefaxersen target and mechanism

Target class-Sen (Aso)
ModalityRNA therapy

Also known as Sefaxersen (RO7434656)

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment459

FDA Designations

No designations recorded

Sefaxersen clinical trials

Sefaxersen · 1 trial · 1 indication

Phase 3 1
NCT05797610A Study to Evaluate the Efficacy and Safety of Sefaxersen (RO7434656) in Participants With Primary Immunoglobulin A (IgA) Nephropathy at High Risk of ProgressionPrimary IgA Nephropathy
ACTIVE NOT_RECRUITING459 Analytics
PHASE3ACTIVE NOT_RECRUITING
A Study to Evaluate the Efficacy and Safety of Sefaxersen (RO7434656) in Participants With Primary Immunoglobulin A (IgA) Nephropathy at High Risk of Progression
Primary IgA NephropathyUnlock trial analytics

Study Endpoints

Primary Endpoints

Change From Baseline in the Urine Protein-to-Creatinine Ratio (UPCR) at Week 37
Baseline, Week 37

UPCR will be assessed in urine sampled over 24 hours.

Secondary Endpoints

Estimated Glomerular Filtration Rate (eGFR) Slope at Week 105 from Baseline
Baseline, Week 105
Time to the Composite Kidney Failure Endpoint
Up to approximately 36 months
Percentage of Participants Achieving Hematuria Resolution at Week 37
At Week 37
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Sefaxersen (RO7434656)EXPERIMENTALParticipants will receive subcutaneous (SC) doses of sefaxersen (RO7434656) on Days 1, 15, and 29 followed by once every 4 weeks (Q4W) until Week 105. Participants may be eligible to switch to open-label treatment after Week 105 at the investigator's discretion or after the common-close timepoint, whichever occurs first. The common-close timepoint is defined as the data cut-off date for the primary analysis.
PlaceboPLACEBO_COMPARATORParticipants will receive SC doses of sefaxersen (RO7434656) matching placebo on Days 1, 15, and 29 followed by once Q4W until Week 105. Participants may be eligible to switch to open-label treatment after Week 105 at the investigator's discretion or after the common-close timepoint, whichever occurs first. The common-close timepoint is defined as the data cut-off date for the primary analysis.

Interventions

NameTypeDescription
Sefaxersen (RO7434656)DRUGSefaxersen (RO7434656) will be administered as SC injection per schedule as specified in the protocol.
PlaceboDRUGMatching placebo will be administered as SC injection per schedule as specified in the protocol.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites171

Inclusion Criteria: * Primary IgAN, as evidenced by a kidney biopsy performed within 10 years prior to or during screening, without known secondary cause * Treatment with maximum tolerated doses of angiotensin-converting enzyme (ACE) inhibitors or angiotensin II receptor blockers (ARBs) for at leas...

Countries:United StatesArgentinaAustraliaBrazilCanadaChinaCzechiaFranceGermanyGreeceHong KongItalyJapanMalaysiaMexicoPolandSingaporeSouth KoreaSpainTaiwanUnited Kingdom
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Recent Changes (Last 90 Days)

MEDIUMOct 5, 2026NCT05797610primaryCompletionDate: changed
MEDIUMOct 5, 2026NCT05797610primaryCompletionDate: changed
MEDIUMAug 14, 2026NCT05797610Status: RECRUITING → ACTIVE_NOT_RECRUITING
MEDIUMAug 14, 2026NCT05797610Status: RECRUITING → ACTIVE_NOT_RECRUITING

Frequently asked questions about Sefaxersen

What is Sefaxersen?

Sefaxersen is an investigational RNA therapy being developed by Roche Holding AG for primary IgA nephropathy, a kidney disease. It is also known as RO7434656. Sefaxersen is currently in Phase 3 clinical development and has not been approved by the FDA.

What is Sefaxersen used for in primary IgA nephropathy?

Sefaxersen is being evaluated for the treatment of primary immunoglobulin A (IgA) nephropathy in adults at high risk of disease progression. It is an investigational therapy and is not yet approved for any indication. Its safety and efficacy are being assessed in a Phase 3 clinical trial.

What does Sefaxersen target?

Sefaxersen is an antisense oligonucleotide, part of the -sen RNA therapy class. Antisense oligonucleotides are designed to bind RNA and modulate the production of specific proteins. Roche is developing sefaxersen as an RNA therapy for primary IgA nephropathy.

Who is developing Sefaxersen?

Sefaxersen is being developed by Roche Holding AG, which trades under the ticker RHHBY. Roche is running the clinical development program for sefaxersen, also known as RO7434656, in primary IgA nephropathy.

What phase is Sefaxersen in?

Sefaxersen is in Phase 3 clinical development. It is an investigational drug and has not been approved by the FDA. The Phase 3 trial is currently active but not recruiting participants.

What clinical trials is Sefaxersen in?

Sefaxersen is being studied in one Phase 3 trial, NCT05797610, titled a study to evaluate the efficacy and safety of sefaxersen (RO7434656) in participants with primary IgA nephropathy at high risk of progression. The trial has enrolled 459 participants, is randomized, double-blind, and placebo-controlled, and is active but not recruiting.

Is Sefaxersen the same as RO7434656?

Yes, sefaxersen and RO7434656 are the same investigational drug. RO7434656 is Roche's internal compound code for sefaxersen, and both names refer to the same RNA therapy being studied in primary IgA nephropathy.