A Phase 2 Study to Evaluate JCXH-105, an SrRNA-based Herpes Zoster Vaccine

Immorna Biotherapeutics

Status and phase: Not yet enrolling; Phase 2

Conditions: Herpes Zoster (HZ); Shingles; Infectious Diseases

Treatments: Biological: Shingrix; Biological: JCXH-105

Study type: Interventional

Funder types: Industry

Identifiers

NCT06581575

JCXH-105-021

Details and patient eligibility

About

The goal of this clinical trial is to assess the safety and immunogenicity of an srRNA-based vaccine, JCXH-105, in the prevention of Herpes Zoster (Shingles).

Subjects will be randomized to receive either JCXH-105 or Shingrix.

Full description

This Phase 2 study plans to enroll a total of 460 subjects.

This will be an active-controlled study in healthy male and/or female subjects 50 years of age or older. Subjects will be randomized 1:1 to receive either JCXH-105 or Shingrix. The study vaccine will be administered in two doses approximately 2 months apart. The subject will receive a single intramuscular (IM) injection of JCXH-105 or Shingrix on Day 1 (Dose 1) and again on Day 61 ± 7 days (Dose 2). For each subject, Dose 1 and Dose 2 are the same study vaccine based on randomization on Day 1. A total of 460 subjects will be enrolled into this trial and vaccinated with either JCXH-105 (n=230) or Shingrix (n=230).

Enrollment: 460 estimated patients

Sex: All

Ages: 50+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion and exclusion criteria

Key Inclusion Criteria:

• Sex: Male or female; female subjects may be of childbearing potential, of nonchildbearing potential, or postmenopausal.
• Age: ≥ 50 years of age at screening.
• Status: Healthy subjects.
• Subjects must agree to not be vaccinated with any HZ vaccine while participating in this study.
• Subjects must agree to not be vaccinated with any RNA-based vaccines (e.g., Spikevax, Comirnaty, etc.) 30 days before Dose 1 through 30 days after Dose 2 (a 4-month period).

Key Exclusion Criteria:

• Subjects with a history of HZ within the past 10 years or current diagnosis of HZ.
• Previous vaccination against HZ.
• Subjects with any respiratory illness deemed clinically relevant by the Investigator within the past month OR hospitalization >24 hours for any reason within the past month prior to the first vaccine administration (JCXH-105 or Shingrix).
• Subjects who are acutely ill or febrile with body temperature ≥ 38.0º Celsius/100.4º Fahrenheit 72 hours prior to or at the Screening visit or on Day 1 pre-dose. Subjects meeting this criterion may be rescheduled within an allowable window with approval from the Sponsor.
• Subjects with history or current diagnosis of congenital or acquired immunodeficiency/immunocompromising/immunosuppressive conditions, asplenia, or recurrent severe infections. Certain immune-mediated conditions (e.g., Hashimoto thyroiditis) that are well controlled and stable are allowed.
• Subjects with history of myocarditis or pericarditis, or with AEs (including anaphylaxis and severe hypersensitivity) after mRNA vaccination that are in nature and severity beyond the common expected AEs and necessitating medical intervention.
• Subjects who received any non-live vaccine within 14 days prior to Day 1 (first dose of JCXH-105 or Shingrix).
• Subjects who received within 28 days prior to Day 1 (first dose of JCXH-105 or Shingrix): (1) Any live vaccine, (2) Immunomodulators or immune-suppressive medication, (3) Granulocyte or granulocyte-macrophage colony-stimulating factor, (4) Three or more consecutive days of systemic corticosteroids. Note: subjects on stable-dose steroid replacement (for chronic disease such as iatrogenic deficiency) of prednisone ≤10 mg/day or equivalent are allowed and (5) Other investigational agents or devices.
• Subjects receiving systemic antiviral therapy.
• Subjects with a positive screening test for hepatitis B surface antigen (HBsAg), hepatitis C virus (HCV) antibodies, anti-human HIV-1 and 2 antibodies, or syphilis.
• Subjects with a positive screening test for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Quadruple Blind

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460 participants in 2 patient groups

Investigational Product

Experimental group

Description:

Participants randomized to this arm will be given the investigational product (JCXH-105).

Treatment:

Biological: JCXH-105

Active Control

Active Comparator group

Description:

Participants randomized to this arm will be given the FDA approved Shingrix.

Treatment:

Biological: Shingrix