A Study to Assess the Intrapulmonary Pharmacokinetics (PK) of SPR719 by Comparing the Plasma, Epithelial Lining Fluid, and Alveolar Macrophage Concentrations Following the Oral Administration of Multiple Doses of SPR720 in Healthy Volunteers.

A Phase 1, Single-center, Open-label Study to Assess the Intrapulmonary Pharmacokinetics of SPR719 by Comparing the Plasma, Epithelial Lining Fluid, and Alveolar Macrophage Concentrations Following the Oral Administration of Multiple Doses of SPR720 in Healthy Volunteers.

Status

Completed

Phases

Phase 1

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT05955586

Enrollment

Registered

2023-07-21

Start date

2023-08-01

Completion date

2024-02-23

Last updated

2024-03-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy Volunteer

Brief summary

The primary purpose of this study is to evaluate the intrapulmonary PK, including epithelial lining fluid (ELF) and alveolar macrophages (AM) concentrations, of SPR719 compared to plasma concentrations of SPR719 (the active moiety in plasma of the prodrug SPR720) after oral administration of SPR720 1000 milligram (mg) capsules every 24 hours for 7 consecutive doses.

Interventions

DRUGSPR720

SPR720 1000 mg (250 mg\*4 capsules) will be administered orally.

Study design

Allocation

Intervention model

SINGLE_GROUP

Primary purpose

TREATMENT

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

18 Years to 55 Years

Healthy volunteers

Yes

Inclusion criteria

Key Inclusion Criteria: 1. Body mass index (BMI) ≥18.0 and ≤32.0 kilograms per meter square (kg/m\^2) and weight between 55.0 and 100.0 kilograms (kg) (inclusive). 2. Forced expiratory volume in 1 second (FEV1) of at least 80% of predicted value at screening visit. 3. Have suitable venous access for blood sampling. 4. Ability and willingness to abstain from alcohol, caffeine, xanthine-containing beverages or food or product containing any of these from 48 hours prior to study drug administration until discharge from the clinical research unit (CRU). Key

Exclusion criteria

1. History of clinically significant acute illness or surgery within the previous 3 months prior to Screening Visit or Day -1. 2. Known history of clinically significant hypersensitivity reaction or anaphylaxis to SPR720 or an aminobenzimidazole. 3. Any condition possibly affecting drug absorption (e.g. previous surgery on the gastrointestinal tract \[including removal of parts of the stomach, bowel, liver, gall bladder, or pancreas\]). 4. Participants who are unable to demonstrate the ability to swallow the dosage forms. 5. Receipt of any other investigational medicinal product or participation in another investigational clinical study that included drug treatment within 30 days prior to Day 1 dose (based on the timing of the last Follow-up Visit in the previous study to Day 1 of the current study). NOTE: Other inclusion and

Design outcomes

Primary

Measure	Time frame
Area Under the Concentration-time Curve from Time Zero to 24 Hours (AUC0-24) of SPR719 in plasma, ELF and AM	Predose on Day 6 and post-dose at multiple time points up to Day 8
Maximum Observed Concentration (Cmax) of SPR719 in plasma, ELF and AM	Predose on Day 6 and post-dose at multiple time points up to Day 8
Time to the Maximum Observed Concentration (Tmax) of SPR719 in plasma, ELF and AM	Predose on Day 6 and post-dose at multiple time points up to Day 8

Secondary

Measure	Time frame
Number of Participants With Treatment-emergent Adverse Events (TEAEs)	From first dose of study drug until the follow-up visit (up to 15 days)

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 5, 2026