Safety and Pharmacokinetics of Rezafungin

Summary

This is a Phase 1, double-blind, placebo-controlled trial in three parts. A single ascending dose (SAD) study in six cohorts receiving a single subcutaneous (SC) dose of 1, 10, 30, 60, 100, or 200 mg of rezafungin; a multiple ascending dose (MAD) study in four cohorts receiving 30 mg x 3 doses, 60 mg x 3 doses, 100 mg x 3 doses, or 200 mg x 3 doses of rezafungin SC with dosing frequency of once every 7 days; and a two-period cross-over bioavailability (BA) study receiving 100 mg of rezafungin. The two period cross-over BA study will be assessed unblinded in two sequences (10 subjects, 100 mg or maximum tolerated dose (MTD) of rezafungin in Part 1); 5 subjects will receive an SC injection of rezafungin in Period 1 followed by an intravenous (IV) infusion of rezafungin in Period 2, and 5 subjects will receive an IV infusion of rezafungin in Period 1 followed by an SC injection of rezafungin in Period 2. Each SAD (except cohort 1) and MAD cohort will contain 8 subjects (6 subjects will receive a SC injection of rezafungin and 2 subjects will receive placebo). Each SAD (except cohort 1) and MAD cohort will be conducted with sentinel dosing. SAD cohort 1 will be comprised of 4 subjects (3:1 rezafungin to placebo) with no sentinel dosing. Parts 2 and 3 of the study will only be conducted after FDA review for safety data and PK data from all subjects participating in Part 1; Part 3 may be run in parallel with the first cohort (Cohort 7) of Part 2. Individuals in the SAD cohorts will participate for approximately 58 days, including up to 28 days for screening and 30 days for dosing and follow-up (FU). Individuals in the MAD cohorts will participate for approximately 73 days, including up to 28 days for screening and 45 days for dosing and FU. Individuals in the BA cohorts will participate for approximately 80 days, including up to 28 days for screening and 52 days for dosing and FU. The study will have a duration of approximately 30 months. The primary objectives are to determine the: 1) safety and tolerability of single ascending SC doses (SAD) of rezafungin; 2) safety and tolerability of multiple ascending SC doses (MAD) of rezafungin; and 3) pharmacokinetic (PK) profile in plasma of rezafungin in healthy adult subjects.

Conditions

• Fungal Infection

Interventions

OTHER

Placebo

5% Dextrose Injection, USP, a sterile, nonpyrogenic solution of dextrose in water for injection. The solution has the osmolarity of 252 mOsmol/L, which is slightly hypotonic. This solution contains no bacteriostat, antimicrobial agent or added buffer.

DRUG

Rezafungin

Rezafungin, 100 mg/mL, is a sterile liquid product supplied in single-dose vials containing 1.0 mL of extractable volume. The active pharmaceutical ingredient is rezafungin acetate, a water-soluble amorphous acetate salt. The inactive ingredient is mannitol.

DRUG

Rezafungin

Rezafungin, 200 mg/vial, is a sterile product supplied as a white to pale yellow lyophilized powder in single-dose glass vials for reconstitution with Sterile Water for Injection, United States Pharmacopeia (USP). The reconstituted product is diluted in 0.9% Sodium Chloride Injection, USP for IV infusion. The active pharmaceutical ingredient is rezafungin acetate, a water-soluble amorphous acetate salt. The inactive ingredients include excipients of mannitol, polysorbate 80, and histidine.

Sponsors & Collaborators

• National Institute of Allergy and Infectious Diseases (NIAID)

  lead NIH

Study Design

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

DOUBLE

Model

SEQUENTIAL

Eligibility

Min Age

18 Years

Max Age

45 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2019-12-04

Primary Completion

2020-05-11

Completion

2020-05-11

FDA Drug

Yes

Countries

• United States

Study Locations