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R2R01

Phase 2

Acute Kidney Injury | Small molecule | Nephrology |Baxter International Inc.|Last Updated: Jun 4, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDBiomarker
Total Trials1
Total Enrollment430

FDA Designations

No designations recorded

Clinical trial landscape

R2R01 · 1 trial · 1 indication

Phase 2 1
NCT07625553Study of the Relaxin Agonist R2R01 in Patients at High Risk for Cardiac Surgery Associated- Acute Kidney InjuryAcute Kidney Injury
RECRUITING430 Analytics
PHASE2RECRUITING
Study of the Relaxin Agonist R2R01 in Patients at High Risk for Cardiac Surgery Associated- Acute Kidney Injury
Acute Kidney InjuryUnlock trial analytics

Study Endpoints

Primary Endpoints

The safety and efficacy of R2R01 for prevention of AKI (Proportion of subjects deve) after cardiac surgery (CABG, valve surgery, aortic surgery, or a combination of the above) involving CPB, in subjects with additional risk factors for developing CSA-AKI
18 months

The outcome will be measured as: • Nature, of treatment-emergent adverse events (TEAEs).

The safety and efficacy of R2R01 for prevention of AKI (Proportion of subjects deve) after cardiac surgery (CABG, valve surgery, aortic surgery, or a combination of the above) involving CPB, in subjects with additional risk factors for developing CSA-
18 months

The outcome will be measured as frequency of treatment-emergent adverse events (TEAEs).

Secondary Endpoints

Evaluation of R2R01 for the reduction of postoperative AKI severity
18 months
- Evaluation R2R01 for the reduction of postoperative AKI duration
18 months
The efficacy of R2R01 on renal function
18 months
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
R2R01 at a dose of 5.0 mgEXPERIMENTALDrug
R2R01 at a dose of 2.5 mgEXPERIMENTALDrug
PlaceboPLACEBO_COMPARATORPlacebo

Interventions

NameTypeDescription
R2R01DRUGR2R01 (i.e., 5.0 mg and 2.5 mg, or alternative doses, as recommended by the SRC)
PlaceboOTHERPlacebo
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * Patient is able to communicate well with the Investigator, understands and is willing to comply with all requirements of the study, and understands and signs the written informed consent form (ICF). * At least 18 years of age. * Subject is scheduled for non-emergent CABG (sing...

Countries:Italy
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Frequently asked questions about R2R01

What is R2R01 used for?

R2R01 is an investigational small molecule being developed for Acute Kidney Injury (AKI). It is currently being studied in patients at high risk for cardiac surgery-associated acute kidney injury, a serious complication that can occur after heart surgery. The drug is in Phase 2 clinical development and has not been approved by regulatory authorities.

How does R2R01 work?

R2R01 is a relaxin agonist, meaning it activates relaxin receptors in the body. Relaxin is a hormone that can promote vasodilation and improve blood flow, which may help protect the kidneys from injury. By targeting these receptors, R2R01 aims to reduce the risk of acute kidney injury in high-risk patients undergoing cardiac surgery.

Who is developing R2R01?

R2R01 is being developed by Baxter International Inc., a global medical products company traded on the New York Stock Exchange under the ticker symbol BAX. Baxter is conducting clinical trials to evaluate the safety and efficacy of R2R01 for the prevention of acute kidney injury in patients undergoing cardiac surgery.

What phase is R2R01 in?

R2R01 is currently in Phase 2 clinical development. It is an investigational drug, meaning it has not been approved by the FDA or other regulatory agencies. The ongoing Phase 2 trial is recruiting participants to assess the drug's effectiveness and safety in preventing acute kidney injury following cardiac surgery.

What clinical trials is R2R01 in?

R2R01 is being studied in a Phase 2 clinical trial registered as NCT07625553. This randomized, double-blind, placebo-controlled trial is recruiting 430 adults in Italy who are at high risk for cardiac surgery-associated acute kidney injury. The study is currently active and enrolling participants, with no completed trials for R2R01 to date.

Is R2R01 the same as relaxin?

R2R01 is a relaxin agonist, not the same as the natural hormone relaxin. While relaxin is a peptide hormone, R2R01 is a small molecule designed to activate the same receptors. This synthetic approach may offer advantages in stability and delivery compared to the natural hormone, though both target the relaxin pathway.