Safety, Tolerability and Pharmacokinetics of L608 in Healthy Adults

Phase 1

Completed

• Conditions: Pulmonary Arterial Hypertension
• Interventions: Drug: L608 Inhalation Solution; Drug: Placebo solution

• Registration Number: NCT05938946
• Lead Sponsor: Pharmosa Biopharm Inc.

Brief Summary

This is a Phase I, randomized, double-blinded, placebo-controlled single ascending dose, sequential-group study to evaluate the safety, tolerability, and PK of single ascending doses of L608 inhalation in healthy volunteers.

Detailed Description

L608 inhalation Solution (L608) is developed by Pharmosa Biopharm Inc. (PBI) as a new liposomal Iloprost formulation for inhalation use in the treatment of patients with PAH (WHO Group 1). As a liposomal formulation of iloprost, L608 is intended to reduce the dosing frequency, as well as provide sustained and selective release along with achieving therapeutically relevant iloprost level. Meanwhile, L608 is expected to mitigate burst release related local irritation and systemic side effects (e.g., hypotension due to plasma peak) in clinical practice.

This Phase I, randomized, double-blinded, placebo-controlled study will be conducted in healthy volunteers in Australia to evaluate the safety, tolerability, and pharmacokinetic of L608. The dose escalation design is applied in this study. The sentinel dosing design will be applied for all cohorts.

Study Timeline

• Study First Submitted: 2023-06-09
• Study First Submitted QC: 2023-07-06
• Study First Posted: 2023-07-11
• Study Start: 2023-08-30
• Primary Completion: 2024-09-02
• Study Completion: 2024-09-02
• Status Verified: 2024-10
• Last Update Submitted: 2024-10-11
• Last Update Posted: 2024-10-16

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 64

Inclusion Criteria

1. Men and women aged between 18 and 65 (inclusive) at the time of Screening visit. Females must not be pregnant or lactating.
2. Body Mass Index (BMI) of ≥18.5 and ≤30.0 kg/m2
3. Non-smokers or former smokers who have smoked ≤ 100 cigarettes in their lifetime and have not consumed any tobacco or tobacco-containing products for at least 3 months prior to Screening.
4. Females must not be pregnant or lactating and must use acceptable, highly effective double contraception from Screening until 3 months after the last dose of the Investigational product.

Key

Exclusion Criteria

1. Subjects with contraindications or sensitivity to any components of the study treatment.
2. Subjects with medical histories (within 3 months prior to Screening) or ongoing conditions of any clinically significant and/or any other medical conditions which may jeopardize the safety of the subjects and/or effect the results of the study at the Investigator's discretion.
3. Subjects with histories or active conditions of unexplained bleeding events, hemoptysis, abnormal bleeding tendencies, and/or coagulation disorders.
4. Subjects who voluntarily participate in this study and sign the informed consent form prior to any study procedures.
5. Subjects with histories or active conditions of asthma, sleep apnea, chronic obstructive pulmonary disease (COPD), pulmonary fibrosis, bronchiectasis, bronchospasm, and/or reactive airway. Subjects who have had childhood asthma which have resolved as deemed by the PI can be considered.
6. Subjects with histories or active conditions of myocardial infarction (MI), cerebrovascular accident (CVA), coronary artery disease (CAD), unstable angina, heart failure, significant cardiac arrhythmias, congenital or acquired valvular heart disease with clinically insignificant symptom, suspected lung congestion, and/or pulmonary arterial hypertension (PAH) causing by venous thromboembolism.
7. Subjects with systolic blood pressure < 90 mmHg or > 160 mmHg and/or diastolic blood pressure < 50 mmHg or > 95 mmHg at Screening or check-in visit.
8. Subjects with FEV1 less than 80% predicted, FVC ˂80% predicted, or resting oxygen saturation less than 95% at Screening or check-in visit.
9. Subjects with histories of drug or alcohol abuse within 1 year prior to subject check-in (Day -1). Regular alcohol consumption defined as > 10 standard drinks per week.
10. Consumption of products containing caffeine/methylxanthines, poppy seeds and/or alcohol within 48 hours before dosing and products containing grapefruit and/or pomelo (shown to inhibit cytochrome P450 [CYP] 3A4 activity) within 10 days prior to drug administration.
11. Positive results of human immunodeficiency virus (HIV), hepatitis B virus (HBV), hepatitis C virus (HCV), and pregnancy test.
12. Blood donation or significant blood loss (>480 ml) within 3 months prior to Screening.
13. Subjects are pregnant or breast feeding.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
L608 Liposomal inhalation solution	L608 Inhalation Solution	Eight subjects will be enrolled in each cohort and be randomized to receive assigned dose of L608 or placebo (6:2).
Placebo	Placebo solution	Eight subjects will be enrolled in each cohort and be randomized to receive assigned dose of L608 or placebo (6:2).

Primary Outcome Measures

Name	Time	Method
The incidence of dose limiting toxicity (DLT)	Baseline to Day 14	The percentage of subjects with dose limiting toxicity (DLT) within 14 days after dosing
The incidence of treatment emergent adverse events (TEAEs) and serious adverse events (SAEs)	Baseline to Day 21	The percentage of subjects with treatment emergent adverse events (TEAEs) and serious adverse events (SAEs) within 21 days after dosing.
Frequency and severity of treatment emergent adverse events (TEAEs) and serious adverse events (SAEs)	Baseline to Day 21	The frequency and severity of treatment emergent adverse events (TEAEs) and serious adverse events (SAEs) within 21 days after dosing.

Secondary Outcome Measures

Name	Time	Method
Cmax	Baseline to 24 hours	Maximum observed plasma concentration
AUC0-t	Baseline to 24 hours	Area under the plasma concentration-time curve from time 0 to the last quantifiable concentration
AUC0-∞	Baseline to 24 hours	Area under the plasma concentration-time curve from time 0 to infinity
%AUCextrap	Baseline to 24 hours	AUC extrapolated from the last measurable concentration to infinity as a percentage of total AUC
Tmax	Baseline to 24 hours	Time to reach the maximum observed plasma concentration
T1/2	Baseline to 24 hours	Apparent plasma terminal elimination half-life
CL/F	Baseline to 24 hours	Apparent total plasma clearance
Vz/F	Baseline to 24 hours	Apparent volume of distribution during the terminal phase
kel	Baseline to 24 hours	Terminal elimination rate constant

Trial Locations

Locations (1)

CMAX Clinical Research Pty Ltd; 🇦🇺 Adelaide, South Australia, Australia