To Evaluate the Safety of JL18008

Summary

This study is being conducted in healthy adult volunteers to evaluate the safety and tolerability of a single injection of an investigational drug called JL18008. The study also examines how the body processes the drug and how it affects immune cells. Participants receive one intramuscular injection of either JL18008 at one of six dose levels (1, 5, 10, 20, 40, or 70 μg/kg) or a placebo (an inactive substance). The study is randomized, double-blind, and placebo-controlled, meaning participants and study staff do not know who receives the active drug or placebo. Blood samples are collected over 56 days to measure drug levels, immune cell counts (such as CD4⁺ T cells), and any antibodies that may form against the drug. The goal is to find a safe dose that can be tested in future studies of people with HIV who have low CD4⁺ T cells despite antiviral treatment.

Conditions

• HIV Infections

Interventions

DRUG

JL18008 1 μg/kg

Recombinant human serum albumin/human interleukin-7 fusion protein (JL18008). Supplied as a solution for injection at 2.5 mg/mL. Administered as a single intramuscular injection at a dose of 1 μg/kg.

DRUG

JL18008 5 μg/kg

Recombinant human serum albumin/human interleukin-7 fusion protein (JL18008). Supplied as a solution for injection at 2.5 mg/mL. Administered as a single intramuscular injection at a dose of 5 μg/kg.

DRUG

JL18008 10 μg/kg

Recombinant human serum albumin/human interleukin-7 fusion protein (JL18008). Supplied as a solution for injection at 2.5 mg/mL. Administered as a single intramuscular injection at a dose of 10 μg/kg.

DRUG

JL18008 20 μg/kg

Recombinant human serum albumin/human interleukin-7 fusion protein (JL18008). Supplied as a solution for injection at 2.5 mg/mL. Administered as a single intramuscular injection at a dose of 20 μg/kg.

DRUG

JL18008 40 μg/kg

Recombinant human serum albumin/human interleukin-7 fusion protein (JL18008). Supplied as a solution for injection at 2.5 mg/mL. Administered as a single intramuscular injection at a dose of 40 μg/kg.

DRUG

JL18008 70 μg/kg

Recombinant human serum albumin/human interleukin-7 fusion protein (JL18008). Supplied as a solution for injection at 2.5 mg/mL. Administered as a single intramuscular injection at a dose of 70 μg/kg.

DRUG

Placebo (for 1 μg/kg Group)

JL18008 injection buffer (contains the same excipients as the active drug without the active ingredient). Supplied as a solution for injection. Administered as a single intramuscular injection at a volume matching the active dose of 1 μg/kg.

DRUG

Placebo (for 5 μg/kg Group)

JL18008 injection buffer (contains the same excipients as the active drug without the active ingredient). Supplied as a solution for injection. Administered as a single intramuscular injection at a volume matching the active dose of 5 μg/kg.

DRUG

Placebo (for 10 μg/kg Group)

JL18008 injection buffer (contains the same excipients as the active drug without the active ingredient). Supplied as a solution for injection. Administered as a single intramuscular injection at a volume matching the active dose of 10 μg/kg.

DRUG

Placebo (for 20 μg/kg Group)

JL18008 injection buffer (contains the same excipients as the active drug without the active ingredient). Supplied as a solution for injection. Administered as a single intramuscular injection at a volume matching the active dose of 20 μg/kg.

DRUG

Placebo (for 40 μg/kg Group)

JL18008 injection buffer (contains the same excipients as the active drug without the active ingredient). Supplied as a solution for injection. Administered as a single intramuscular injection at a volume matching the active dose of 40 μg/kg.

DRUG

Placebo (for 70 μg/kg Group)

JL18008 injection buffer (contains the same excipients as the active drug without the active ingredient). Supplied as a solution for injection. Administered as a single intramuscular injection at a volume matching the active dose of 70 μg/kg.

Sponsors & Collaborators

• Jecho Biopharmaceuticals Co., Ltd.

  lead INDUSTRY

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

TRIPLE

Model

SEQUENTIAL

Eligibility

Min Age

18 Years

Max Age

55 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2024-06-13

Primary Completion

2025-08-05

Completion

2025-08-05

Countries

• China

Study Locations