A Safety and Immunogenicity Phase IB Study of CryJ2-DNA-Lysosomal Associated Membrane Protein (CryJ2 -DNA-LAMP) Plasmid Assessing the Long Term Safety of Previously Treated Subjects

Phase 1CompletedNCT01966224

Immunomic Therapeutics, Inc.17 enrolled

Overview

This is a continuing research study of a vaccine for allergy to Japanese Red Cedar. The vaccine is called CryJ2-DNA-LAMP Plasmid vaccine. This research study will determine how the vaccine is tolerated and how previous Phase IA research participants respond to the vaccine in a booster dose. CryJ2-DNA-LAMP Plasmid vaccine is investigational, which means it is not approved for use by the United States Food and Drug Administration (FDA) but is available in research studies like this one. The study is a Phase IB, prospective, three cohort, open label study conducted on one cohorts of non-atopic subjects and two cohorts of subjects with a history of allergic rhinitis symptoms to Japanese red cedar CryJ 2 pollen allergen that participated in the previous Phase IA study (all the subjects participated in the previous study). The study will be conducted at 1 study center. Subjects are enrolled in the trial for a period of 80 days. The objectives of the statistical analyses are to establish the safety and to explore the immunogenicity of the LAMP-vax vaccine. All statistical analyses conducted on the data from this trial will be exploratory in nature. The primary objective of this Phase IB Study is to evaluate the safety and immunological responses of an additional dose of CryJ2-DNA-LAMP plasmid vaccine delivered intramuscularly (IM) to subjects who previously received 4 doses of CryJ2-DNA-LAMP vaccine delivered IM every 2 weeks in the previous Phase IA study.

A further safety assessment of the JRC sensitive and non-sensitive subjects who were in Group 1, 2 and 3 of the Phase 1A study will be further assessed in terms of current skin test reactivity, re-vaccination safety and continued safety. Group 1: will receive 2 mg CryJ2-DNA-LAMP plasmid vaccine by intramuscular (IM) injection. The dosing regimen for this group will be to receive one (1) booster dose. This group will be followed for 80 days (+/- 10), assessing skin reactivity and immune response. Group 2: will receive 2 mg CryJ2-DNA-LAMP plasmid vaccine by intramuscular (IM) injection. The dosing regimen for this group will be to receive one (1) booster dose. This group will be followed for 80 days (+/- 10), assessing skin reactivity and immune response. Group 3: will receive 2 mg CryJ2-DNA-LAMP plasmid vaccine by intramuscular (IM) injection. The dosing regimen for this group will be to receive one (1) booster dose. This group will be followed for 80 days (+/- 10), assessing skin reactivity and immune response.

Study Type

INTERVENTIONAL

Allocation

Eligibility

Sex: ALLMin age: 18 YearsMax age: 63 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Subjects that participated in the previous Phase I A study who demonstrated a change from positive to Japanese Red Cedar pollen/Mountain Cedar at Day 0, to negative in at Day 132 (to be assigned to Group 1) and who have not experienced a grade 3 adverse reaction. * Subjects that participated in the previous Phase I A study who originally tested negative and remained negative to Japanese Red Cedar pollen/Mountain Cedar negative from Day 0 through Day 132 (to be assigned to Group 2 ) and who have not experienced a grade 3 adverse reaction. \*For the purposes of this study, retrospective skin testing data (as long as it has been performed within 60 days of screening) will be accepted, using the same positive inclusion criteria * Execute a written informed consent (in English and where appropriate in Japanese) to participate in the study. * For subjects to be enrolled in this study in Groups 2 and 3, a documented allergy to Japanese Red Cedar pollen as demonstrated by a positive epicutaneous skin test for Japanese Red Cedar pollen, CryJ2 or Mountain Cedar antigen (wheal \> 3mm greater than the negative control). Although, the subjects may have positive skin tests to other allergens, these will not be used to qualify or to participate in the study. For the purposes of this study, retrospective skin testing data (from the previous Phase IA study) will be accepted, using the same positive inclusion criteria * Female subjects of childbearing potential, defined as not surgically sterile or at least 2 years postmenopausal, must agree to use one of the following forms of contraception for the duration of the study: hormonal (oral, implant, or injection) begun \>30 days prior to screening, barrier (condom, diaphragm with spermicide), intrauterine device (IUD), or vasectomized partner (6 months minimum). * No clinically significant abnormal findings on the physical examination, with the exception of HEENT (head, eyes, ears, nose and throat) findings consistent with allergic rhinitis, medical history, or clinical laboratory results during screening which, in the opinion of the Investigator, would jeopardize the safety of the subject or impact the validity of the study results. * Subject must be willing and able to comply with study requirements. Exclusion Criteria: * Previous Japanese red cedar allergen immunotherapy \[(Subcutaneous Immunotherapy (SCIT), oral immunotherapy, SLIT(Sublingual Immunotherapy), or recombinant peptide\] except for investigational therapy administered in Phase IA (CryJ2-DNA-LAMP) which is not an exclusion criteria. * History of anaphylaxis requiring medical intervention. * Intolerance of or severe allergic reaction to previous immunotherapy (SCIT, oral immunotherapy, SLIT, or recombinant peptide). * History of asthma requiring daily medication with the exception of exercise induced asthma. (History of intermittent and/or mild asthma is permitted) * Subjects receiving anti-IgE monoclonal antibodies, or any antibodies therapeutically. * Congenital immune deficiency or acquired immune suppression. Causes of acquired immune suppression may include, but are not limited to, systemic illnesses such as malignancy and infection, the use of medications such as corticosteroids and chemotherapeutic agents, and radiation therapy. * History of organ transplant, hematologic malignancy, autoimmune disease, myocardial infarction, or congestive heart failure. * History of clinically significant gastrointestinal, renal, hepatic, neurologic, hematologic diseases which, in the opinion of the Principal Investigator, would jeopardize the safety of the subject or impact the validity of the study results. * Inability or unwillingness to stop using drugs that may inhibit the ability to treat a severe allergic adverse event. This includes, but is not limited to; beta blockers such as atenolol (Tenormin), metoprolol (Lopressor, Toprol-XL) and propranolol (Inderal, Inderal LA) for 48 hours prior to each visit. All subjects must be off of antihistamine therapy 7 days before skin testing. * Female subjects who are trying to conceive, are pregnant, or are lactating. * Positive serum pregnancy test at screening or a positive human chorionic gonadotropin (HCG) urine test on Visit 1 for women of childbearing potential. * Positive blood screen for human immunodeficiency virus (HIV), Hepatitis B surface antigen (HbSAg), or Hepatitis C. * Chronic history of recurrent sinusitis, urticaria or angioedema within the last 12 months. * History of alcohol or drug abuse within the year prior to the Screening Visit 1, or current evidence of substance dependence or abuse. * Laboratory Values (hematology, biochemistry, urine tests), that are outside the normal ranges, unless the abnormality is not considered clinically significant by the investigator. * Participation in a clinical trial or receipt of a non-FDA approved therapy within 30 days prior to the Screening Visit. * Subjects with anti-LAMP antibodies above the Cutpoint Assay baseline will be excluded. * Subjects who participated in the prior Phase I A study and experienced a grade 3, severe reaction after vaccination.

Outcomes

Primary Outcomes

Number of participants with Adverse Events

The primary objective of this Phase I Study is to evaluate the safety and immunological responses of therapeutic doses and the dosing regimen of CryJ2-DNA-LAMP plasmid vaccine. Adverse events will be monitored on each subject from the time of enrollment to exit from the study. Vital signs will be recorded on each subject at baseline and days 50, 80 and early termination. Physical exams will be conducted on the subjects at the baseline and days 50, 80 and early termination.

Time frame: 80 days (+/-)

Secondary Outcomes

Immunogenicity and functional variables [Japanese Red Cedar Immunocap (IgE & IgG), Mountain Cedar Immunocap (IgE) & Th1/Th2 cytokines ELISA Panel]

Immonogenecity parameters include: Japanese Red Cedar Immunocap (IgE \& IgG), Mountain Cedar Immunocap (IgE) \& Th1/Th2 cytokines ELISA Panel. These parameters will determine if there is a change in beneficial immunoglobulins(IgG), and changes in Th1/Th2 cytokines in the serum of non-atopic (no allergic sensitivities to CryJ2 allergen) subjects and atopic subjects with known allergy to Japanese Red Cedar CryJ2 allergen. These subjects were identified by positive skin test re-activity and/or IgG specific antibody titers from previous time-points in the Phase IA using one boost of IM route of administration. Immunogenicity parameters will be measured at baseline and days 50, 80 or ET of the trial.