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

An Open Label, Multi-Center, Safety and Pharmacokinetic Bridging Study of MB-102 (Relmapirazin) and the Use of the MediBeacon® Transdermal GFR Measurement System Using the TGFR Reusable Sensor With Disposable Adhesive Ring in Normal and Renal Compromised Subjects for the Evaluation of Kidney Function

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.

Study Overview

• Status: Completed
• Conditions: Kidney Diseases; Kidney Injury; Kidney Failure
• Intervention / Treatment: Drug: MB-102; Device: MediBeacon Transdermal Glomerular Filtration Rate Measurement System (TGFR)

• Study Type: Interventional
• Enrollment (Actual): 149
• Phase: Phase 3

Contacts and Locations

Study Locations

• United States
  • Illinois
    • Chicago, Illinois, United States, 60643
      • Research by Design, LLC
  • Ohio
    • Columbus, Ohio, United States, 43213
      • Centricity Research
  • Texas
    • Austin, Texas, United States, 78744
      • PPD
    • San Antonio, Texas, United States, 78212
      • Clinical Advancement Center, PLLC
    • San Antonio, Texas, United States, 78240
      • Endeavor Clinical Trials, LLC

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• 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

Exclusion Criteria:

• 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

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Basic Science
• Allocation: Non-Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Participants with eGFR ≥ 70 mL/min/1.73 m^2; 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; 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; Other Names: Relmapirazin; Device: MediBeacon Transdermal Glomerular Filtration Rate Measurement System (TGFR); 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.
Experimental: Participants with eGFR < 70 mL/min/1.73 m^2; 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; 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; Other Names: Relmapirazin; Device: MediBeacon Transdermal Glomerular Filtration Rate Measurement System (TGFR); 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.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
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 Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of Participants With Treatment-emergent Adverse Events Associated With MB-102 Administration	An adverse event is defined as any untoward medical occurrence, unintended disease or injury, or untoward clinical signs (including abnormal laboratory findings) in subjects, temporally associated with the use of a medicinal product, whether or not related to the investigational medical device or drug.	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	An adverse event is defined as any untoward medical occurrence, unintended disease or injury, or untoward clinical signs (including abnormal laboratory findings) in subjects, temporally associated with the use of a medicinal product, whether or not related to the investigational medical device or drug.	From the time of dosing through the follow-up visit, up to 10 days

Collaborators and Investigators

• Sponsor: MediBeacon

Study record dates

Study Major Dates

• Study Start (Actual): March 20, 2023
• Primary Completion (Actual): April 15, 2024
• Study Completion (Actual): April 15, 2024

Study Registration Dates

• First Submitted: March 8, 2023
• First Submitted That Met QC Criteria: March 8, 2023
• First Posted (Actual): March 21, 2023

Study Record Updates

• Last Update Posted (Actual): March 28, 2025
• Last Update Submitted That Met QC Criteria: March 27, 2025
• Last Verified: March 1, 2025

More Information

Terms related to this study

• Keywords: Iohexol; Pharmacokinetics; MB-102; Glomerular Filtration Rate; Transdermal fluorescence detection; Relmapirazin
• Additional Relevant MeSH Terms: Urogenital Diseases; Male Urogenital Diseases; Urologic Diseases; Female Urogenital Diseases; Female Urogenital Diseases and Pregnancy Complications; Renal Insufficiency; Kidney Diseases
• Other Study ID Numbers: 100-201

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: Yes
• product manufactured in and exported from the U.S.: No