Ignite Creation Date:
2026-03-26 @ 3:15 PM
Ignite Modification Date:
2026-03-30 @ 9:04 PM
Study NCT ID:
NCT07313150
Status:
NOT_YET_RECRUITING
Last Update Posted:
2025-12-31
First Post:
2025-11-14
Is NOT Gene Therapy:
True
Has Adverse Events:
False
Brief Title:
A Phase I Trial of Subcutaneous QLS7305 in Healthy Adults
Sponsor:
Qilu Pharmaceutical Co., Ltd.
Organization:
Study Overview
Official Title:
A Phase I Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Immunogenicity of QLS7305 Following Subcutaneous Administration in Healthy Chinese Participants.
Status:
NOT_YET_RECRUITING
Status Verified Date:
2025-12
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
The goal of this clinical trial is to evaluate the safety, tolerability, and preliminary characteristics of the investigational drug QLS7305 in healthy adult participants in China. The main questions it aims to answer are:
What is the safety and tolerability profile of single and multiple subcutaneous doses of QLS7305 in healthy adults? What are the pharmacokinetic (PK) characteristics of QLS7305 and its major metabolites? What are the pharmacodynamic (PD) effects of QLS7305 on the complement system (e.g., serum C3 levels and complement activity)? Does QLS7305 induce an immunogenic response (anti-drug antibodies)? What is the effect of QLS7305 on the QTc interval? Investigators will compare different dose levels of QLS7305 to a placebo group to see the effects on safety, tolerability, and the measured parameters.
Participants will:
Be enrolled in one of two parts of the study:
Part A (Single Ascending Dose): Receive a single dose of QLS7305 or placebo. Part B (Multiple Ascending Dose): Receive multiple doses of QLS7305 or placebo (doses selected based on Part A results).
Receive prophylactic antibiotics (Penicillin V) after the first dose until their serum complement C3 level recovers, as a safety precaution.
Undergo close safety monitoring throughout the study, including a follow-up period of up to 337 days to ensure safety parameters return to acceptable levels.
What is the safety and tolerability profile of single and multiple subcutaneous doses of QLS7305 in healthy adults? What are the pharmacokinetic (PK) characteristics of QLS7305 and its major metabolites? What are the pharmacodynamic (PD) effects of QLS7305 on the complement system (e.g., serum C3 levels and complement activity)? Does QLS7305 induce an immunogenic response (anti-drug antibodies)? What is the effect of QLS7305 on the QTc interval? Investigators will compare different dose levels of QLS7305 to a placebo group to see the effects on safety, tolerability, and the measured parameters.
Participants will:
Be enrolled in one of two parts of the study:
Part A (Single Ascending Dose): Receive a single dose of QLS7305 or placebo. Part B (Multiple Ascending Dose): Receive multiple doses of QLS7305 or placebo (doses selected based on Part A results).
Receive prophylactic antibiotics (Penicillin V) after the first dose until their serum complement C3 level recovers, as a safety precaution.
Undergo close safety monitoring throughout the study, including a follow-up period of up to 337 days to ensure safety parameters return to acceptable levels.
Detailed Description:
The primary objective of this study is to evaluate the safety and tolerability of QLS7305 Injection subcutaneously administered to healthy adults. The secondary objectives are to evaluate the pharmacokinetic (PK) characteristics, the pharmacodynamic (PD) characteristics, the immunogenicity and the effect of subcutaneous injection of QLS7305 injection on QTc interval in healthy adult participants.
This study consists of two parts:
* Part A (SAD): This part employs a randomized, double-blind, placebo-controlled design. It is planned to include 5 sequential dose groups (50 mg, 100 mg, 200 mg, 400 mg, and 800 mg). A total of 36 participants are planned: 4 participants in the first dose group and 8 participants in each subsequent dose group. Within each dose group, participants will be randomized in a 3:1 ratio to receive a single dose of either QLS7305 or placebo. Dose escalation between dose groups will proceed sequentially based on the review of safety, tolerability, and PK/PD data by the SMC. The SMC may adjust the dose levels and decide on the enrollment strategy for the highest cohort (e.g., staggered enrollment) based on participant safety. The study may be terminated early if a dose is deemed intolerable or if the study objectives are met.
* Part B (MAD): This part will also use a randomized, double-blind, placebo-controlled design. It is planned to include 2 to 3 dose groups, with 8 participants in each dose group randomized 3:1 to receive QLS7305 or placebo. The specific dose levels and dosing regimen (e.g., on Day 1 and Day 29) for Part B will be determined by the SMC based on the cumulative data from Part A.
Participants will be screened from Day -77 to Day -2. After providing informed consent, participants will receive vaccinations against Neisseria meningitidis and Streptococcus pneumoniae at least two weeks prior to dosing. Eligible participants will be admitted to the clinic on Day -1 for baseline assessments. Dosing will occur on Day 1 (for both parts) and additionally on Day 29 (for Part B). Intensive safety and PK assessments will be performed. Participants will receive prophylactic antibiotic treatment (e.g., Penicillin V) post-dose, which may be discontinued based on the investigator's assessment of serum complement C3 levels and safety risk.
A long-term follow-up period of up to Day 337 post-dose is planned to monitor safety, PD markers (C3, CP, AP), and immunogenicity. Participants with suppressed complement levels at Day 169 will undergo additional follow-up every 8 weeks until recovery (or until Day 337). After Day 337, the unblinded physician may arrange for further monitoring of specific participants if complement levels remain below predefined recovery thresholds.
This study consists of two parts:
* Part A (SAD): This part employs a randomized, double-blind, placebo-controlled design. It is planned to include 5 sequential dose groups (50 mg, 100 mg, 200 mg, 400 mg, and 800 mg). A total of 36 participants are planned: 4 participants in the first dose group and 8 participants in each subsequent dose group. Within each dose group, participants will be randomized in a 3:1 ratio to receive a single dose of either QLS7305 or placebo. Dose escalation between dose groups will proceed sequentially based on the review of safety, tolerability, and PK/PD data by the SMC. The SMC may adjust the dose levels and decide on the enrollment strategy for the highest cohort (e.g., staggered enrollment) based on participant safety. The study may be terminated early if a dose is deemed intolerable or if the study objectives are met.
* Part B (MAD): This part will also use a randomized, double-blind, placebo-controlled design. It is planned to include 2 to 3 dose groups, with 8 participants in each dose group randomized 3:1 to receive QLS7305 or placebo. The specific dose levels and dosing regimen (e.g., on Day 1 and Day 29) for Part B will be determined by the SMC based on the cumulative data from Part A.
Participants will be screened from Day -77 to Day -2. After providing informed consent, participants will receive vaccinations against Neisseria meningitidis and Streptococcus pneumoniae at least two weeks prior to dosing. Eligible participants will be admitted to the clinic on Day -1 for baseline assessments. Dosing will occur on Day 1 (for both parts) and additionally on Day 29 (for Part B). Intensive safety and PK assessments will be performed. Participants will receive prophylactic antibiotic treatment (e.g., Penicillin V) post-dose, which may be discontinued based on the investigator's assessment of serum complement C3 levels and safety risk.
A long-term follow-up period of up to Day 337 post-dose is planned to monitor safety, PD markers (C3, CP, AP), and immunogenicity. Participants with suppressed complement levels at Day 169 will undergo additional follow-up every 8 weeks until recovery (or until Day 337). After Day 337, the unblinded physician may arrange for further monitoring of specific participants if complement levels remain below predefined recovery thresholds.
Study Oversight
Has Oversight DMC:
True
Is a FDA Regulated Drug?:
False
Is a FDA Regulated Device?:
False
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?: