A Study of Single and Multiple Doses of LP-005 in Healthy Adult Participants

December 8, 2025 updated by: Longbio Pharma

To Evaluate the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of Escalating Single and Multiple Doses of LP-005 in Healthy Volunteers

The purpose of this study is to evaluate safety, tolerability, immunogenicity, pharmacokinetics, pharmacodynamics, and efficacy of LP-005 in healthy volunteers. The study will be conducted in 2 parts: Part 1, the single ascending dose (SAD) is the first in human (FIH) study of LP-005 and Part 2, multiple ascending dose (MAD).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
68

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • China
    • Shanghai Municipality
      • Shanghai, Shanghai Municipality, China
        • Shanghai Public Health Clinical Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  1. Healthy males or females aged 18 through 50 years
  2. Male subjects with a weight of ≥50 kg, female subjects with a weight of ≥45 kg, and BMI between 19.0 and 26.0 kg/m² (inclusive).
  3. Vaccination: Meningococcal Conjugate Vaccine, Serogroups A, C, W, Y (MPV-ACYW) meningococcal conjugate vaccine and Streptococcus pneumoniae vaccine should be given 14 days or more before randomisation.
  4. Male subjects and their partners or female subjects must agree to use one or more non-pharmaceutical contraceptive methods (such as total abstinence, condoms, Iuds, partner ligation, etc.) during the trial period and for 6 months after the trial, and do not plan to donate sperm or eggs.
  5. The subjects fully understand the purpose, nature, method and possible adverse reactions of the experiment, and voluntarily participate in the experiment and sign the informed consent.
  6. The subjects were able to communicate well with the researchers and complete the study according to the protocol.

Exclusion Criteria:

  1. Participants who are immunocompromised or have one of the following underlying diseases: anatomic absence of spleen (including sickle cell disease); congenital complement component deficiencies (complement component 3 and complement component 4).
  2. Any history of Neisseria gonorrhea, meningitis infection, and Guillain-Barré syndrome.
  3. Contraindications to meningococcal vaccination (previous medical history such as epilepsy or other brain disorders).
  4. Presence or suspicion of active viral, bacterial, fungal, or parasitic infection, including herpes, shingles, or cold sores, within 14 days prior to screening.
  5. History of unexplained recurrent infections, or use of systemic antibiotics within 90 days prior to dosing.
  6. Malignancy or history of malignancy, except non-melanoma skin cancer cured for more than 3 years.
  7. Positive HIV test (HIV-Ab), positive hepatitis B virus (HBV) test (HBsAg), positive hepatitis C virus (HCV), positive anti-syphilis helix-specific antibodies.
  8. Participation in a clinical trial of any other drug within 3 months prior to screening or within 5 half-lives of other clinical trial drugs (selecting the longer time period).
  9. Women who are pregnant, breastfeeding, or at risk of pregnancy.
  10. Any condition deemed unsuitable for study participation by the investigator.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Cohort 1: LP-005 Dose 1 (Single)
Biological: LP-005 Dose 1 (Single)
A single dose of LP-005 (Dose 1) was administered intravenously.
Experimental: Cohort 2: LP-005 Dose 2 (Single)
Biological: LP-005 Dose 2 (Single)
A single dose of LP-005 (Dose 2) was administered intravenously.
Experimental: Cohort 3: LP-005 Dose 3 (Single)
Biological: LP-005 Dose 3 (Single)
A single dose of LP-005 (Dose 3) was administered intravenously.
Experimental: Cohort 4: LP-005 Dose 4 (Single)
Biological: LP-005 Dose 4 (Single)
A single dose of LP-005 (Dose 4) was administered intravenously.
Experimental: Cohort 5: LP-005 Dose 5 (Single)
Biological: LP-005 Dose 5 (Single)
A single dose of LP-005 (Dose 5) was administered intravenously.
Experimental: Cohort 6: LP-005 Dose 6 (Single)
Biological: LP-005 Dose 6 (Single)
A single dose of LP-005 (Dose 6) was administered intravenously.
Placebo Comparator: Cohort 7: Placebo (Single)
Biological: Placebo (Single)
A single dose of placebo was administered intravenously.
Experimental: Cohort 8: LP-005 Dose 7 (Multiple)
Biological: LP-005 Dose 7 (Multiple)
LP-005 (Dose 7) was administered multiple times intravenously.
Experimental: Cohort 9: LP-005 Dose 8 (Multiple)
Biological: LP-005 Dose 8 (Multiple)
LP-005 (Dose 8) was administered multiple times intravenously.
Experimental: Cohort 10: LP-005 Dose 9 (Multiple)
Biological: LP-005 Dose 9 (Multiple)
LP-005 (Dose 9) was administered multiple times intravenously.
Placebo Comparator: Cohort 11: Placebo (Multiple)
Biological: Placebo (Multiple)
Placebo was administered multiple times intravenously.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Adverse events
Time Frame: Observation for 78 days after administration
Number of subjects with treatment-related Treatment Emergent Adverse Events (TEAEs).
Observation for 78 days after administration

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Time to peak concentration (Tmax) of LP-005
Time Frame: Observation for 78 days after administration
The time when the blood drug concentration reaches its peak after a single dose of medication.
Observation for 78 days after administration
Maximum concentration (Cmax) of LP-005
Time Frame: Observation for 78 days after administration
The maximum concentration of LP-005 in the bloodstream after administration.
Observation for 78 days after administration
Elimination half-life (t1/2) of LP-005
Time Frame: Observation for 78 days after administration
The time required for the concentration of LP-005 in the bloodstream to decrease by half.
Observation for 78 days after administration
Area under the concentration-time curve (AUC0-t) of LP-005
Time Frame: Observation for 78 days after administration
The area under the concentration-time curve (AUC) from time zero to the last chosen time point represents the integral of the drug concentration in the bloodstream over the specified duration.
Observation for 78 days after administration
Apparent clearance rate (CL/F) of LP-005
Time Frame: Observation for 78 days after administration
The ratio of drug clearance to drug concentration, represents the apparent clearance of a drug after administration, adjusted for bioavailability.
Observation for 78 days after administration
Assessment of immunogenicity
Time Frame: Observation for 78 days after administration
The proportion of anti drug antibody (ADA) positive subjects at different detection time points.
Observation for 78 days after administration
Assessment of complement C5 activity
Time Frame: Observation for 78 days after administration
Evaluate complement C5 hemolytic activity and serum concentration of C5 changes from baseline at various time points of assessment.
Observation for 78 days after administration
Assessment of complement C3b activity
Time Frame: Observation for 78 days after administration
Evaluate C3b deposition on red blood cells and serum concentration of C3b changes from baseline at various time points of assessment.
Observation for 78 days after administration

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Longbio Pharma

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
November 23, 2023

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
August 31, 2024

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
August 31, 2024

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
February 3, 2024

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
February 27, 2024

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
March 5, 2024

Study Record Updates

Last Update Posted (Estimated)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
December 15, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 8, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
October 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • P10-LP005-01

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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