Healthy VolunteersPhase 1NCT03893799
A Study of RBT-1 in Healthy Volunteers and Subjects With Stage 3/4 Chronic Kidney Disease
A Phase 1 study testing RBT-1 in people with Healthy Volunteers and Chronic Kidney Disease, run by Renibus Therapeutics, Inc. at 1 site in United States.
Trial summary
This is a Phase 1b, single-center, dose-escalating study to evaluate the safety, tolerability, pharmacokinetics, and pharmacodynamic effect of RBT-1 in healthy volunteers and in subjects with Stage 3/4 CKD. Read more about this study
- Who is it for?
- Ages 18 to 80 yearsHealthy volunteers can take part
- Conditions the study is for
- Healthy Volunteers, Chronic Kidney Disease
- What is being tested?
- RBT-1
- Type of treatment
- Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 54 participants
- Where
- 1 siteUnited States
- Study dates
- 27 Aug 2019to 31 Dec 2020
- Phase
- Phase 1
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 80 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Male and female subjects age 18 to 80 years (inclusive, at time of ICF).
- Body weight <125 kg.
- Able and willing to comply with all study procedures.
- Female subjects must be either post-menopausal for at least 1 year or surgically sterile (tubal ligation, hysterectomy or bilateral oophorectomy) for at least 3 months, or if of childbearing potential, have a negative pregnancy test and agree to use dual methods of contraception, or abstain from sexual activity from Screening until 28 days after study drug administration.
- Male subjects with female partners of childbearing potential must agree to use a highly effective method of contraception from screening until 28 days after study drug administration. All fertile men with female partners of childbearing potential should be instructed to contact the Investigator immediately if they suspect their partner might be pregnant (e.g., missed or late menstrual period) at any time during study participation.
- CKD Stage 3 as determined by estimated glomerular filtration rate (eGFR) between 30-59 mL/min/1.73 m2 using the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation.
- CKD Stage 4 as determined by eGFR between 15-29 mL/min/1.73 m2 using the CKD-EPI equation.
Who cannot join
- History of malignancy except carcinoma in situ in the cervix, early stage prostate cancer or non-melanoma skin cancers.
- Use of investigational drugs or participation in another clinical trial within 30 days or 5 half-lives prior to screening, whichever is longer.
- Serum ferritin > 500 ng/ml or who have received IV iron within 28 days of screening, or currently being treated with oral iron.
- Women who are pregnant, breastfeeding, or planning to become pregnant while participating in the study.
- Any significant acute or chronic diseases.
- Subjects with abnormal baseline liver tests or hepatitis serologies that suggest active infection.
Show all 12Show fewer
- Regular use of drugs of abuse and/or positive findings on urinary drug screening.
- Current tobacco use and/or positive findings on urinary cotinine screening.
- Subjects who are severely physically or mentally incapacitated and who, in the opinion of investigator, are unable to perform the subjects' tasks associated with the protocol.
- Presence of any condition which, in the opinion of the investigator, places the subject at undue risk or potentially jeopardizes the quality of the data to be generated.
- Subjects with history of photosensitivity or active skin disease
- Known hypersensitivity or previous anaphylaxis to RBT-1 or to components thereof.
Trial locations and contacts
1 site in 1 country.
United States1 site
Riverside Clinical Research
Edgewater, Florida, 32141
About this study
Official title: A Phase 1b Dose-escalating Study With RBT-1 in Healthy Volunteers and Subjects With Stage 3/4 Chronic Kidney Disease
This is a Phase 1b, single-center, dose-escalating study to evaluate the safety, tolerability, pharmacokinetics, and pharmacodynamic effect of RBT-1 in healthy volunteers and in subjects with Stage 3/4 CKD.
- Conditions
- Healthy Volunteers, Chronic Kidney Disease
- Being tested
- RBT-1
- Medical subject headings
- Renal Insufficiency, Chronic
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
RBT-1Drug
Single intravenous administration
| Study group | Role | What they receive |
|---|---|---|
| 9 mg SnPP/240 mg FeS | Experimental | Not described Receives: Drug: RBT-1 |
| 27 mg SnPP/240 mg FeS | Experimental | Not described Receives: Drug: RBT-1 |
| 45 mg SnPP/240 mg FeS | Experimental | Not described Receives: Drug: RBT-1 |
| 63 mg SnPP/240 mg FeS | Experimental | Not described Receives: Drug: RBT-1 |
| 90 mg SnPP/240 mg FeS | Experimental | Not described Receives: Drug: RBT-1 |
What is being measured
The primary outcome is the main question the study is designed to answer.
Effect of RBT-1 on Plasma Ferritin Levels
Measured: 24 hours post-infusion
Effect of RBT-1 on Plasma HO-1 Levels
Measured: 24 hours post-infusion
Effect of RBT-1 on Plasma IL-10 Levels
Measured: 24 hours post-infusion
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted28 Mar 2019
- Study start27 Aug 2019
- Primary completion22 Apr 2020
- Study completion31 Dec 2020
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for Healthy VolunteersStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 1
- Primary purpose
- Prevention
- Allocation
- Non-randomised
- Intervention model
- Sequential
- Masking
- None (open label)
- Enrolment
- 54 participants (actual)
Sponsor and investigators
- Lead sponsor
- Renibus Therapeutics, Inc.
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03893799
- Sponsor's protocol ID
- REN-001A
- Status last verified
- Jul 2025
- First submitted
- 25 Mar 2019
- Last updated
- 7 Aug 2025
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- Yes
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Zager RA, Johnson ACM, Guillem A, Keyser J, Singh B. A Pharmacologic "Stress Test" for Assessing Select Antioxidant Defenses in Patients with CKD. Clin J Am Soc Nephrol. 2020 May 7;15(5):633-642. doi: 10.2215/CJN.15951219. Epub 2020 Apr 14.
PubMed 32291269
Study at a glance
From the registry record, last updated by the sponsor on 7 Aug 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Phase 1b Dose-escalating Study With RBT-1 in Healthy Volunteers and Subjects With Stage 3/4 Chronic Kidney Disease
- ClinicalTrials.gov ID
- NCT03893799
- Acronym / sponsor ID
- REN-001A
- Conditions
- Healthy Volunteers, Chronic Kidney Disease
- Phase
- Phase 1
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 54 participants (actual)
- Lead sponsor
- Renibus Therapeutics, Inc.Industry (pharma, biotech, devices)
- Study start
- 27 Aug 2019 (actual)
- Primary completion
- 22 Apr 2020 (actual)
- Study completion
- 31 Dec 2020 (actual)
- First posted
- 28 Mar 2019 (actual)
- Results
- Posted 7 Aug 2025
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This is a Phase 1b, single-center, dose-escalating study to evaluate the safety, tolerability, pharmacokinetics, and pharmacodynamic effect of RBT-1 in healthy volunteers and in subjects with Stage 3/4 CKD.
Study design
- Primary purpose
- Prevention
- Allocation
- Non-randomised
- Intervention model
- Sequential
- Masking
- None (open label)
- Number of arms
- 5
| Arm | Type | Receives |
|---|---|---|
| 9 mg SnPP/240 mg FeS | Experimental | Drug: RBT-1 |
| 27 mg SnPP/240 mg FeS | Experimental | Drug: RBT-1 |
| 45 mg SnPP/240 mg FeS | Experimental | Drug: RBT-1 |
| 63 mg SnPP/240 mg FeS | Experimental | Drug: RBT-1 |
| 90 mg SnPP/240 mg FeS | Experimental | Drug: RBT-1 |
Who may qualify
- Ages
- 18 to 80 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (7 listed)
- Male and female subjects age 18 to 80 years (inclusive, at time of ICF).
- Body weight <125 kg.
- Able and willing to comply with all study procedures.
- Female subjects must be either post-menopausal for at least 1 year or surgically sterile (tubal ligation, hysterectomy or bilateral oophorectomy) for at least 3 months, or if of childbearing potential, have a negative pregnancy test and agree to use dual methods of contraception, or abstain from sexual activity from Screening until 28 days after study drug administration.
- Male subjects with female partners of childbearing potential must agree to use a highly effective method of contraception from screening until 28 days after study drug administration. All fertile men with female partners of childbearing potential should be instructed to contact the Investigator immediately if they suspect their partner might be pregnant (e.g., missed or late menstrual period) at any time during study participation.
Key exclusion criteria (12 listed)
- History of malignancy except carcinoma in situ in the cervix, early stage prostate cancer or non-melanoma skin cancers.
- Use of investigational drugs or participation in another clinical trial within 30 days or 5 half-lives prior to screening, whichever is longer.
- Serum ferritin > 500 ng/ml or who have received IV iron within 28 days of screening, or currently being treated with oral iron.
- Women who are pregnant, breastfeeding, or planning to become pregnant while participating in the study.
- Any significant acute or chronic diseases.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| RBT-1Single intravenous administration | Drug | 27 mg SnPP/240 mg FeS, 45 mg SnPP/240 mg FeS, 63 mg SnPP/240 mg FeS, 9 mg SnPP/240 mg FeS, 90 mg SnPP/240 mg FeS |
Primary outcome
Effect of RBT-1 on Plasma Ferritin Levels
Time frame: 24 hours post-infusion
Effect of RBT-1 on Plasma HO-1 Levels
Time frame: 24 hours post-infusion
Effect of RBT-1 on Plasma IL-10 Levels
Time frame: 24 hours post-infusion
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 7 Aug 2025.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Derived from this study: PubMed 32291269Zager RA, Johnson ACM, Guillem A, Keyser J, Singh B. A Pharmacologic "Stress Test" for Assessing Select Antioxidant Defenses in Patients with CKD. Clin J Am Soc Nephrol. 2020 May 7;15(5):633-642. doi: 10.2215/CJN.15951219. Epub 2020 Apr 14.
- Individual participant dataSharing planned: No
Related trials for Healthy Volunteers
Not yet recruiting
Neuroergonomic Analysis of a Brain-Computer Interface Device (BCI)
Healthy Volunteers - Male and Female
RecruitingPhase 1
First-in-Human Trial to Assess REGN20423 in Healthy Adult Participants and Adult Participants With Atopic Dermatitis
Healthy Volunteer, Atopic Dermatitis
Not yet recruitingObservational study
Establishment of Biobank of Nasal Epithelium Samples From Healthy Volunteers
Healthy
RecruitingObservational study
Improved Methods of Cell Selection for Bone Marrow Transplant Alternatives
Graft-Versus-Host Disease, Graft-versus-leukemia
Not yet recruitingObservational study
Screening Protocol
Pain
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 1 study testing RBT-1 in people with Healthy Volunteers and Chronic Kidney Disease, run by Renibus Therapeutics, Inc. at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 7 inclusion and 12 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 7 Aug 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 7 Aug 2025). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Effect of RBT-1 on Plasma Ferritin Levels (time frame: 24 hours post-infusion). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT03893799, which also lists 1 linked publication.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 7 Aug 2025.