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VX-147

Phase 2

Glomerulosclerosis, Focal Segmental | Small molecule | Nephrology |Vertex Pharmaceuticals Incorporated|Last Updated: Aug 26, 2026

Target and mechanism

Molecular targetAPOL1
Target classGene
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials1
Total Enrollment16

FDA Designations

No designations recorded

Clinical trial landscape

VX-147 · 3 trials · 3 indications

Phase 2 2Phase 1 1
NCT05312879Phase 2/3 Adaptive Study of VX-147 in Adult and Pediatric Participants With APOL1-Mediated Proteinuric Kidney DiseaseProteinuric Kidney Disease
RECRUITING466 Analytics
NCT04340362Phase 2a Study of VX-147 in Adults With APOL1-mediated Focal Segmental GlomerulosclerosisGlomerulosclerosis, Focal Segmental
COMPLETED16 Analytics
PHASE2RECRUITING
Phase 2/3 Adaptive Study of VX-147 in Adult and Pediatric Participants With APOL1-Mediated Proteinuric Kidney Disease
Proteinuric Kidney DiseaseUnlock trial analytics
PHASE2COMPLETED
Phase 2a Study of VX-147 in Adults With APOL1-mediated Focal Segmental Glomerulosclerosis
Glomerulosclerosis, Focal SegmentalUnlock trial analytics

Study Endpoints

Primary Endpoints

Part A: Percent Change From Baseline in Urine Protein to Creatinine Ratio (UPCR) at Week 48 (Assessed at the Week 48 Interim Analysis)
From Baseline to Week 48
Part A: Estimated Glomerular Filtration Rate (eGFR) Slope Assessed at Interim Analysis
From Baseline Through >= Week 48
Part A: eGFR Slope Assessed at Final Analysis
From Baseline Through Study Completion (At least 2 years of eGFR data assessed at the final analysis)
Part B: Safety and Tolerability as Assessed by Number of Participants With Adverse events (AEs) and Serious Adverse Events (SAEs)
Day 1 Through Study Completion (Approximately 4 Years After the Last Participant Enrolls)
Percent Change From Baseline in UPCR
From Baseline up to Week 13
Maximum Observed Plasma Concentration (Cmax) of VX-147 Test Compared to VX-147 Reference
From Day 1 up to Day 16
Area Under the Concentration Versus Time Curve From the Time of Dosing Extrapolated to Infinity (AUC0-inf) of VX-147 Test Compared to VX-147 Reference
From Day 1 up to Day 16
Cmax of VX-147 Test Compared Under Fed Versus Fasted State
From Day 1 up to Day 16
AUC(0-inf) of VX-147 Test Compared Under Fed Versus Fasted State
From Day 1 up to Day 16

Secondary Endpoints

Part A: Safety and Tolerability as Assessed by Number of Participants With Adverse events (AEs) and Serious Adverse Events (SAEs)
Day 1 Through Study Completion (Approximately 2 Years After the Last Participant Enrolls)
Part A: Maximum Plasma Concentration (Cmax) of VX-147
Day 1 and Week 40
Part A: Area Under the Concentration Versus Time Curve During a Dosing Interval (AUCtau) of VX-147
Day 1 and Week 40
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part A (Phase 2/3): VX-147EXPERIMENTALParticipants will be randomized to receive different doses of VX-147. Participants will receive the selected dose of VX-147 for atleast 96 weeks.
Part A (Phase 2/3): PlaceboPLACEBO_COMPARATORParticipants will receive placebo matched to VX-147.
Part B (Phase 3): VX-147EXPERIMENTALParticipants who complete Part A will receive VX-147 for an additional 96 weeks.
VX-147EXPERIMENTALAll participants received VX-147 at a dosage of 15 mg once daily (qd) for 2 weeks and VX-147 at a dosage of 45 mg qd for 11 weeks. Part A was enrolled in 2 cohorts: Cohort 1 and Cohort 2. Cohort 1 included participants with urine protein to creatinine ratio (UPCR) approximately greater than or equal to (≥) 3 g/g (± 10%) and less than (\<) 10 g/g and estimated glomerular filtration rate (eGFR) approximately ≥30 mL/min/1.73 m2 (± 10%). Cohort 2 included participants with UPCR approximately ≥0.8 g/g (± 10%) and \<2.7 g/g and eGFR approximately ≥30 mL/min/1.73 m2.
Sequence A: VX-147EXPERIMENTALParticipants will receive VX-147 reference tablet under fasted condition in Treatment Period 1, then VX-147 test tablet under fed condition in Treatment Period 2, and VX-147 test tablet under fasted condition in Treatment Period 3. A washout period of 5 days will be maintained between 3 treatment periods.
Sequence B: VX-147EXPERIMENTALParticipants will receive VX-147 test tablet under fed condition in Treatment Period 1, then VX-147 test tablet under fasted condition in Treatment Period 2, and VX-147 reference tablet under fasted condition in Treatment Period 3. A washout period of 5 days will be maintained between 3 treatment periods.
Sequence C: VX-147EXPERIMENTALParticipants will receive VX-147 test tablet under fasted condition in Treatment Period 1, then VX-147 reference tablet under fasted condition in Treatment Period 2, and VX-147 test tablet under fed condition in Treatment Period 3. A washout period of 5 days will be maintained between 3 treatment periods.

Interventions

NameTypeDescription
VX-147DRUGTablets for oral administration.
PlaceboDRUGTablets for oral administration.
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Eligibility Criteria

Age Range10 Years to 65 Years
SexALL
Healthy VolunteersNo
Study Sites318

Key Inclusion Criteria: Part A: * APOL1 genotype of G1/G1, G2/G2, or G1/G2 * Proteinuric kidney disease Part B: \- Completion of Treatment Period in Part A and no permanent discontinuation of study drug. Key Exclusion Criteria: Part A: * Solid organ or bone marrow transplant * Uncontrolled hy...

Countries:United StatesBelgiumBrazilCanadaColombiaFranceGhanaNetherlandsNigeriaPortugalPuerto RicoSpainUnited Kingdom
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Recent Changes (Last 90 Days)

LOWAug 26, 2026NCT05312879lastUpdatePostDate: changed
LOWAug 26, 2026NCT05312879lastUpdatePostDate: changed
LOWAug 4, 2026NCT05312879lastUpdatePostDate: changed
LOWAug 4, 2026NCT05312879lastUpdatePostDate: changed
LOWJun 25, 2026NCT05312879lastUpdatePostDate: changed
LOWJun 25, 2026NCT05312879lastUpdatePostDate: changed
LOWJun 25, 2026NCT05312879lastUpdatePostDate: changed

Frequently asked questions about VX-147

What is VX-147 used for?

VX-147 is an investigational small molecule being developed by Vertex Pharmaceuticals for APOL1-mediated proteinuric kidney diseases, including focal segmental glomerulosclerosis (FSGS). It is designed to target the APOL1 gene. VX-147 is currently in clinical development and is not yet approved by the FDA.

What does VX-147 target?

VX-147 targets APOL1, a gene implicated in certain forms of kidney disease. By targeting APOL1, VX-147 is being studied as a potential treatment for APOL1-mediated proteinuric kidney diseases, including focal segmental glomerulosclerosis (FSGS). The drug is an investigational small molecule developed by Vertex Pharmaceuticals.

Who makes VX-147?

VX-147 is being developed by Vertex Pharmaceuticals Incorporated, a biopharmaceutical company traded on the NASDAQ under the ticker VRTX. The company is conducting clinical trials to evaluate VX-147 as a potential treatment for APOL1-mediated proteinuric kidney diseases, including focal segmental glomerulosclerosis (FSGS).

What phase is VX-147 in?

VX-147 is in Phase 1 clinical development, though it has also been studied in later-phase trials. A Phase 2a study (NCT04340362) has been completed, and a Phase 2/3 adaptive study (NCT05312879) is currently recruiting participants. VX-147 is investigational and has not been approved by the FDA.

What clinical trials is VX-147 in?

VX-147 has been studied in several clinical trials. A Phase 2a study (NCT04340362) in adults with APOL1-mediated FSGS is completed. A Phase 2/3 adaptive study (NCT05312879) in adult and pediatric participants with APOL1-mediated proteinuric kidney disease is recruiting. A Phase 1 bioavailability study (NCT05955872) is also completed.

Is VX-147 the same as inaxaplin?

VX-147 is also known as inaxaplin, an investigational small molecule targeting APOL1 for the treatment of APOL1-mediated proteinuric kidney diseases, including focal segmental glomerulosclerosis (FSGS). Vertex Pharmaceuticals is developing inaxaplin under the code name VX-147.