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ELX-02

Phase 2

Alport Syndrome | Small molecule | Other |Eloxx Pharmaceuticals, Inc.|Trials Updated: Feb 24, 2026

ELX-02 development status

Highest phase Phase 2
Registered trials 8 across 1 sponsor since Jun 2016

ELX-02 target and mechanism

Molecular targetRPSA, RPS27, RPS6, RPS2, RPS3, RPS3A
Target classModulator
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials6
Total Enrollment141

FDA Designations

No designations recorded

ELX-02 clinical trials

ELX-02 · 6 trials · 5 indications

Phase 2 3Phase 1 3
NCT05448755A Study of ELX-02 in Patients With Alport SyndromeAlport Syndrome
COMPLETED3 Analytics
NCT04135495A Phase 2 Study to Evaluate the Safety, Tolerability, PK and PD of ELX-02 in Cystic Fibrosis Patients With G542X AlleleCystic Fibrosis
COMPLETED17 Analytics
NCT04126473A Phase 2 Study to Evaluate the Safety, Tolerability, PK and PD in Cystic Fibrosis Patients With at Least 1 G542X AlleleCystic Fibrosis
COMPLETED17 Analytics
PHASE2COMPLETED
A Study of ELX-02 in Patients With Alport Syndrome
Alport SyndromeUnlock trial analytics
PHASE2COMPLETED
A Phase 2 Study to Evaluate the Safety, Tolerability, PK and PD of ELX-02 in Cystic Fibrosis Patients With G542X Allele
Cystic FibrosisUnlock trial analytics
PHASE2COMPLETED
A Phase 2 Study to Evaluate the Safety, Tolerability, PK and PD in Cystic Fibrosis Patients With at Least 1 G542X Allele
Cystic FibrosisUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants With Adverse Events Associated With Administration of 0.75 mg/kg of ELX-02 Once Daily
From the time of first dosing through the end of the follow-up period, a total of 5 months

Treatment Emerging Adverse Events were defined as any adverse events with onset after the first administration of study medication through the end of the study, or any event that was present at baseline but worsened in intensity or was subsequently considered drug-related by the Investigator through the end of the study. Severe Treatment Emerging Adverse Event is a Treatment Emerging Adverse Events with CTCAE Grade 3 or above. Related Treatment Emerging Adverse Events is defined as a Treatment Emerging Adverse Events with a certain, probable/likely, or possible relationship to the study drug. Serious Adverse Events were Adverse Events resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening.

AEs associated with different dose levels of ELX-02
From the time of first dosing through the follow-up visit, an average of approximately 9 weeks
Area under the plasma concentration curve from time zero to 24 hours (AUC0-24h)
Day 1 of treatment periods 1, 2, 3, and 4

Full PK profile 8 blood samples over 24 hours

Maximum observed plasma concentration (Cmax) on Day 1
Day 1 of treatment periods 1, 2, 3, and 4

Full PK profile 8 blood samples over 24 hours

Peak observed plasma concentration (Cpeak) over time
Days 1, 2, and 7 of treatment periods 1-3; Days 1, 2, 7, and 14 of treatment period 4, sparse blood sampling at 30 min and 1 hour post dose
Trough observed plasma concentration (Cpredose) over time
Days 1, 2 and 7 of treatment periods 1-3, Days 1, 2, 7 and 14 of treatment period 4, sparse sampling at pre-dose
Area under the plasma concentration curve from time zero to 24 hours (AUC0-24)
Day 1 of treatment periods 1, 2, 3, and 4

Full PK profile 8 blood samples up to 24 hours

Trough observed plasma concentrations (Cpredose) over time
Days 1, 2 and 7 of treatment periods 1-3, Days 1, 2, 7 and 14 of treatment period 4, sparse blood sampling at pre-dose
Pharmacokinetic Parameters- Plasma AUC0-24
0.25, 0.5, 0.75, 1, 2, 4, 6, 12, and 24 hours after dosing

Area under the curve (AUC0-24) of ELX-02 plasma concentration following a single subcutaneous (SC) dose

Pharmacokinetic Parameters- Plasma Cmax
0.25, 0.5, 0.75, 1, 2, 4, 6, 12, 24, 36, 48, 72, and 168 (Day 8) hours after dosing

Peak Plasma Concentration (Cmax) of ELX-02 following a single subcutaneous (SC) dose in subjects with normal renal function, mild, moderate, or severe renal impairment

AUC0-inf
0.25, 0.5, 0.75, 1, 2, 4, 6, 12, 24, 36, 48, 72, and 168 (Day 8) hours after dosing

Area under the curve (AUC0-inf) of ELX-02 plasma concentration following a single subcutaneous (SC) dose

Pharmacokinetic Parameters - Plasma Tmax
0.25, 0.5, 0.75, 1, 2, 4, 6, 12, and 24 hours after dosing.

Time to maximum concentration (Tmax) of ELX-02 plasma concentration following a single subcutaneous (SC) dose

Urine Pharmacokinetics Parameter - Ae0-t
Pre-dose (first void in the morning of Day 1), 0-3, 3-6, 6-9, 9-12, 12-18, 18-24, 24-36, 36-48, and 48-72 hours post-dose

Cumulative amount of unchanged drug excreted into urine (Ae0-t) of ELX-02 following a single subcutaneous (SC) dose

Urine Pharmacokinetic Parameter - Rmax
Pre-dose (first void in the morning of Day 1), 0-3, 3-6, 6-9, 9-12, 12-18, 18-24, 24-36, 36-48, and 48-72 hours post-dose

Maximum rate of urinary extraction (Rmax) of ELX-02 following a single subcutaneous (SC) dose

Number of Patients Reporting Treatment-Emergent Adverse Events (TEAEs) [Safety]
1-8 days

TEAEs are undesirable events not present prior to medical treatment, or an already present event that worsens either in intensity or frequency following the study treatment

Pharmacokinetic Parameters - Plasma AUC0-24
Day 1: pre-dose, 15 min, 30 min, 45 min, 1h, 3h, 6h, 12h, 24h, post-dose

Day 1 Area under the curve (AUC0-24) of ELX-02 plasma concentration following the subcutaneous (SC) dose on Day 1 to 24 hours post-ose

Pharmacokinetic Parameters - Plasma Cmax
Day 1: pre-dose, 15 min, 30 min, 45 min, 1h, 3h, 6h, 12h, 24h, 36h, 48h, 72h, post-dose

Day 1 Peak Plasma Concentration (Cmax) of ELX-02 following the subcutaneous (SC) dose on Day 1 to 72 hours post-dose

Pharmacokinetic Parameter - Plasma AUC0-inf
Day 1: pre-dose, 15 min, 30 min, 45 min, 1h, 3h, 6h, 12h, 24h, 36h, 48h, 72h post dose

Day 1 Area under the curve (AUC0-inf) of ELX-02 plasma concentration following the subcutaneous (SC) dose on Day 1 extrapolated to infinity

Pharmacokinetic Parameter - Plasma Tmax
Day 1: pre-dose, 15 min, 30 min, 45 min, 1h, 3h, 6h, 12h, 24h, 36h, 48h, 72h post-dose

Day 1 Time to maximum concentration (Tmax) of ELX-02 plasma concentrations following the subcutaneous (SC) dose on Day 1

Pharmacokinetic Parameter Plasma - Tmax
Day 29: pre-dose, 15 min, 30 min, 45 min, 1h, 3h, 6h, 12h, 24h, 36h, 48h, 72h post-dose

Day 29 Time to maximum concentration (Tmax) of ELX-02 plasma concentrations following the subcutaneous (SC) dose on Day 29

Pharmacokinetic Parameter - Plasma Rac(AUC24h)
Day 1 and Day 24 hr

Accumulation ratio, calculated as AUC24h Day29/AUC24h Day 1

Pharmacokinetic Parameter - Plasma RAC(Cmax)
Day 1 and Day 29

Accumulation ratio, calculated as Cmax Day29/Cmax Day 1

Urine Pharmacokinetics Parameter - Ae72h
Day 1: pre-dose and during 0-12h, 12-24h, 24-48h, and 48-72h post-dose

Day 1 Cumulative amount of unchanged drug excreted into urine (Ae72h) of ELX-02 following the subcutaneous (SC) dose on Day 1

Urine Pharmacokinetics Parameter - Fe12h Day 1
12 hours

Percent of dose excreted (Fe) in urine on Day 1

Urine Pharmacokinetics Parameter - Fe 12h on Day 29
12 h on Day 29

Percent of dose excreted (Fe) in urine on Day 29

Urine Pharmacokinetics Parameter - CLR24h on Day 1
24 hours

Renal clearance on Day 1 (CLR=Ae24h/plasmaAUC24h)

Urine Pharmacokinetics Parameter - CLR24h
24 h

Renal clearance on Day 29 (CLR=Ae24h/plasmaAUC24h)

Adverse Events
0-10 days

Incidence and characteristics of adverse events occurring following single doses of ELX-02

Pharmacokinetics: Maximum plasma concentration (Cmax)
0-10 days

Cmax will be determined for ELX-02 and an estimation of ELX-02 dose proportionality of PK parameters.

Pharmacokinetics: Time at which Cmax occurs (tmax)
0-10 days

tmax will be determined for ELX-02 and an estimation of ELX-02 dose proportionality of PK parameters.

Pharmacokinetics: Area under the plasma concentration-time curve calculated from time of administration to time 24h (AUC24h)
0-10 days

AUC24h will be determined for ELX-02 and an estimation of ELX-02 dose proportionality of PK parameters.

Pharmacokinetics: Area under the plasma concentration-time curve calculated from time of administration to time 48h (AUC48h)
0-10 days

AUC48h will be determined for ELX-02 and an estimation of ELX-02 dose proportionality of PK parameters.

Pharmacokinetics: Area under the concentration-time curve from time 0 extrapolated to infinity (AUCinf)
0-10 days

AUCinf will be determined for ELX-02 and an estimation of ELX-02 dose proportionality of PK parameters.

Pharmacokinetics: Mean residence time (MRT)
0-10 days

MRT will be determined for ELX-02 and an estimation of ELX-02 dose proportionality of PK parameters.

Pharmacokinetics: Elimination half-life (t1/2)
0-10 days

t1/2 will be determined for ELX-02 and an estimation of ELX-02 dose proportionality of PK parameters.

Pharmacokinetics: Volume of distribution (Vd/F)
0-10 days

Vd/F will be determined for ELX-02 and an estimation of ELX-02 dose proportionality of PK parameters.

Pharmacokinetics: Clearance (CL/F)
0-10 days

CL/F will be determined for ELX-02 and an estimation of ELX-02 dose proportionality of PK parameters.

Secondary Endpoints

Change From Baseline in Proteinuria
From screening assessment to end of study treatment, total of 3 timepoints for results at Baseline, Week 4 and End of Treatment at Day 60.
Change From Baseline to End of Treatment in Collagen IV Expression (Combined Average of Alpha 3 and Alpha 4 Chains)
Baseline to End of Treatment (at Day 60)
Change From Baseline to End of Treatment in Collagen IV Expression (Foot Process Width in Renal Biopsy)
Baseline to End of Treatment (at Day 60)
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Open label study drug treatmentEXPERIMENTAL -
ELX-02EXPERIMENTALEukaryotic ribosomal selective glycoside (ERSG)
Placebo Comparator ArmPLACEBO_COMPARATORPlacebo
Active treatmentACTIVE_COMPARATORELX-02

Interventions

NameTypeDescription
ELX-02DRUGELX-02 is a small molecule, new chemical entity being developed for the treatment of genetic diseases caused by nonsense mutations. ELX-02 is a eukaryotic ribosomal selective glycoside (ERSG).
IvacaftorDRUGCFTR potentiator
PlaceboDRUGPlacebo
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Eligibility Criteria

Age Range6 Years to 30 Years
SexALL
Healthy VolunteersNo
Study Sites4

Inclusion Criteria: * A confirmed diagnosis of X-linked or autosomal recessive Alport Syndrome with a documented nonsense mutation of Col4A5 in a male or nonsense mutation of Col4A3 or Col4A4 (male or female) * The nonsense mutation should be UAG or UGA * eGFR\>60 ml/min/1.73 m2 (based on CKD-EPI f...

Countries:AustraliaUnited KingdomUnited StatesCanadaGermanyIsraelBelgium
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