Study of MB-102 (Relmapirazin) and the Use of the MediBeacon® Transdermal GFR Measurement System Using the TGFR Reusable Sensor With Disposable Adhesive Ring

NCT05777174 | Completed Phase 3 Results FDA Drug FDA Device

• 1 other identifier: 100-201
• Study Type: interventional
• Target: 149
• Locations: 1 country
• Sites: 5

Brief Summary

The goal of this clinical trial was to compare transdermal glomerular filtration rate (tGFR) to plasma-derived indexed GFR (nGFR) using MB-102 (relmapirazin) as the fluorescent compound. Adults with kidney function ranging from estimated glomerular filtration rate (eGFR) \<120 to \>15 mL/min/1.73 m2 and spanning the entire range of human skin colors as defined by the Fitzpatrick Skin Scale (FSS) were included in the study. The main questions that the study aimed to answer were:

• To establish that the MB-102 transdermal fluorescence assessed GFR using the MediBeacon Transdermal GFR System with the TGFR reusable sensor with disposable adhesive ring was comparable to the measured MB-102 plasma GFR.
• To evaluate the safety and effectiveness of the MediBeacon Transdermal GFR System and the TGFR reusable sensor with disposable adhesive ring for the non-invasive transdermal fluorescence detection of MB-102 in participants On dosing day, participants had the TGFR reusable sensor with disposable adhesive ring placed on their chest, and the MediBeacon Transdermal GFR System initiated to collect background fluorescence. When this was completed, participants then received a single dose of MB-102. Blood samples were collected and fluorescent measurements were taken over a 12- or 24-hour (or longer) period, depending upon enrollment group. For those with significant renal compromise, fluorescent measurements were continued until the sensor no longer detected MB-102 in the body. Following completion of the treatment period, participants returned to the study center approximately 1 week later for a safety follow-up visit. Researchers compared the results to see if the transdermal GFR measurements were comparable to the measured plasma GFR.

Conditions

Kidney Diseases; Kidney Injury; Kidney Failure

Keywords

Glomerular Filtration Rate; Relmapirazin; Iohexol; Pharmacokinetics; Transdermal fluorescence detection; MB-102

Outcome Measures

Primary Outcomes (1)

• Correlation of Transdermal Derived Glomerular Filtration Rate (tGFR) to the Plasma-derived Indexed Glomerular Filtration Rate (nGFR)

  The performance measure of P30 is defined as the proportion of transdermal derived GFR values that are within 30% of the measured plasma-derived GFR across all participants. The comparison of transdermal derived glomerular filtration rate (tGFR) with respect to the plasma-derived indexed glomerular filtration rate (nGFR) was calculated with a double-sided 97% confidence interval (CI). The performance goal was 0.85, and success for the study was defined as a lower limit of the 97% CI greater than 0.85.

  Up to 24 hours following the study dose

Secondary Outcomes (2)

• Number of Participants With Treatment-emergent Adverse Events Associated With MB-102 Administration

  From the time of dosing through the follow-up visit, up to 10 days

• Number of Participants With Treatment-emergent Adverse Events Associated With the MediBeacon Transdermal GFR Measurement System Device

  From the time of dosing through the follow-up visit, up to 10 days

Study Arms (2)

Participants with eGFR ≥ 70 mL/min/1.73 m^2

EXPERIMENTAL

A TGFR Reusable Sensor with Disposable Adhesive Ring was placed on participants' chests at least 15 minutes prior to dosing on treatment day, and the MediBeacon Transdermal GFR System was initiated to collect background fluorescence. After the collection of background fluorescence, a single dose of MB-102 (130 mg) was administered intravenously to participants with estimated glomerular filtration rate (eGFR) eGFR ≥ 70 mL/min/1.73 m\^2. Approximately half of the participants had Fitzpatrick Scale Type I, II or III, and half had Type IV, V and VI skin color type. Blood samples and fluorescent measurements were collected over 12 hours.

Drug: MB-102; Device: MediBeacon Transdermal Glomerular Filtration Rate Measurement System (TGFR)

Participants with eGFR < 70 mL/min/1.73 m^2

EXPERIMENTAL

A TGFR Reusable Sensor with Disposable Adhesive Ring was placed on participants' chests at least 15 minutes prior to dosing on treatment day, and the MediBeacon Transdermal GFR System was initiated to collect background fluorescence. After the collection of background fluorescence, a single dose of MB-102 (130 mg) was administered intravenously to participants with estimated glomerular filtration rate eGFR \< 70 mL/min/1.73 m\^2. Approximately half of the participants had Fitzpatrick Scale Type I, II or III, and half had Type IV, V and VI skin color type. Blood samples and fluorescent measurements were collected over 24 hours.

Drug: MB-102; Device: MediBeacon Transdermal Glomerular Filtration Rate Measurement System (TGFR)

Interventions

MB-102 DRUG

18.6 mg/mL in a 7.0 mL volume administered by intravenous injection over 30 - 60 seconds, followed by a 10 mL normal saline flush administered intravenously over 30 - 60 seconds

Also known as: Relmapirazin

Participants with eGFR < 70 mL/min/1.73 m^2; Participants with eGFR ≥ 70 mL/min/1.73 m^2

MediBeacon Transdermal Glomerular Filtration Rate Measurement System (TGFR) DEVICE

On treatment day, participants had the TGFR reusable sensor with disposable adhesive ring placed on their chest, and the MediBeacon® Transdermal GFR Measurement System was initiated to collect background fluorescence. When this was completed, participants received a single dose of MB-102. Fluorescent measurements were collected for 12-24 hours. For those with significant renal compromise, fluorescent measurements were continued until the sensor no longer detected MB-102 in the body.

Participants with eGFR < 70 mL/min/1.73 m^2; Participants with eGFR ≥ 70 mL/min/1.73 m^2

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Eligible female non-pregnant participants who are either not of child-bearing potential or willing to use adequate contraception during the trial
• Males must be willing to practice abstinence or utilize adequate contraception from dosing day to at least 7 days post-dose
• For women of childbearing potential, the participant should have a negative serum pregnancy test at screening, and agrees to one of the following acceptable contraceptive methods used consistently and correctly i.e. abstinence, oral contraceptive either combined or progesterone alone; injectable progesterone, implants of levonorgestrel, estrogenic vaginal ring, percutaneous contraceptive patches, IUD device or system or male partner sterilization
• Men will not donate sperm during the study and for 1 month following the last dose of study drug.
• Participants who are capable of directly providing informed consent and who can comply with the requirements and restrictions required by the protocol
• Adequate venous access sufficient to allow blood sampling per protocol requirements

You may not qualify if:

• Participants positive for COVID-19 at the time of dosing
• Recent donation or loss of blood or plasma: 100 mL to 499 mL within 30 days prior to the initial dose of the study medication; or more than 499 mL within 56 days prior to the initial dose of study medication
• Non-steroidal anti-inflammatory (NSAID) use within 3 days of MB-102 dosing
• The participant has participated in a clinical trial and has received an investigational product within the following time ranges: prior to the first dosing day in the current study: either 30 days or 5 half-lives of the investigational product (whichever duration is longer).
• History of skin sensitivity to adhesives (e.g. Band-Aids, surgical tape)
• History of severe allergic hypersensitivity reactions (unacceptable adverse events) or anaphylactoid reaction to any allergen including drugs, MB-102 or other related products (intolerance to a drug is not considered a drug allergy).
• Any characteristics which, in the opinion of the investigator, makes the participant a poor candidate for participation in the clinical trial
• Significant scaring, tattoos or alterations in pigmentation on the sternum or other sensor location testing areas that would alter sensor readings versus other areas of the skin
• Use of tanning sprays, tanning products etc. on the upper chest within 2 weeks of dosing day
• Use make-up, lotions, Vaseline or other products on the area of the upper chest on the day prior to or the day of dosing
• Any serious or uncontrolled medical disorder, active infection, physical exam finding, laboratory finding, or psychiatric condition that in the opinion of the investigator would limit the participant's ability to complete study requirements or may put the participant at increased risk or compromise the interpretability of study results.
• Currently receiving dialysis
• Currently anuric
• Positive serum pregnancy test
• Participants with an eGFR \> 120 mL/min/1.73m\^2

Sponsors & Collaborators

• MediBeacon: lead

Study Sites (5)

Research by Design, LLC

Chicago, Illinois, 60643, United States

Location

Centricity Research

Columbus, Ohio, 43213, United States

Location

PPD

Austin, Texas, 78744, United States

Location

Clinical Advancement Center, PLLC

San Antonio, Texas, 78212, United States

Location

Endeavor Clinical Trials, LLC

San Antonio, Texas, 78240, United States

Location

MeSH Terms

Conditions

Kidney Diseases; Renal Insufficiency

Interventions

relmapirazin

Condition Hierarchy (Ancestors)

Urologic Diseases; Female Urogenital Diseases; Female Urogenital Diseases and Pregnancy Complications; Urogenital Diseases; Male Urogenital Diseases

Results Point of Contact

• Title: Richard B Dorshow, PhD
• Organization: MediBeacon, Inc.

rbdorshow@medibeacon.com

314-735-0967

Publication Agreements

• PI is Sponsor Employee: No
• Restriction Type: OTHER
• Restrictive Agreement: Yes

Study Design

• Study Type: interventional
• Phase: phase 3
• Allocation: NON RANDOMIZED
• Masking: NONE
• Purpose: BASIC SCIENCE
• Intervention Model: PARALLEL
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: March 8, 2023
• First Posted: March 21, 2023
• Study Start: March 20, 2023
• Primary Completion: April 15, 2024
• Study Completion: April 15, 2024
• Last Updated: March 28, 2025
• Results First Posted: March 28, 2025

Record last verified: 2025-03

Data Sharing

• IPD Sharing: Will not share

Locations

US (5)