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Trial details imported from ClinicalTrials.gov

For full trial details, please see the original record at https://clinicaltrials.gov/show/NCT03066986




Registration number
NCT03066986
Ethics application status
Date submitted
20/02/2017
Date registered
1/03/2017
Date last updated
11/08/2020

Titles & IDs
Public title
Study of Sting Challenge and Serological Responses to Jack Jumper Venom Immunotherapy With Inulin as Adjuvant (Jumpvax)
Scientific title
A Dose Ranging Study of Sting Challenge and Specific lgE, and IgG4 Responses to Jack Jumper Ant (JJA) [Myrmecia Pilosula] Venom Immunotherapy (VIT) With and Without Delta-inulin as an Adjuvant.
Secondary ID [1] 0 0
CT-2015-CTN-03308-1 v2
Secondary ID [2] 0 0
CALHN Ref No. R20151007
Universal Trial Number (UTN)
Trial acronym
Jumpvax
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Ant Sting 0 0
Immunotherapy 0 0
Condition category
Condition code
Injuries and Accidents 0 0 0 0
Other injuries and accidents

Intervention/exposure
Study type
Interventional
Description of intervention(s) / exposure
Treatment: Drugs - Delta-inulin
Other interventions - Dose finding comparison

Experimental: 25mcg JJA venom - Subjects will receive semi-rush JJA VIT (without delta-inulin) aiming to achieve a maintenance dose of JJA venom of 25mcg (dose finding comparison).

Experimental: 25mcg JJA venom + 5mg delta-inulin - Subjects will receive semi-rush JJA VIT with delta-inulin (at a fixed dose of 5 mg with each dose of venom) aiming to achieve a maintenance dose of JJA venom of 25mcg (dose finding comparison, adjuvant comparison).

Active Comparator: 50mcg JJA venom - Subjects will receive semi-rush JJA VIT (without delta-inulin) aiming to achieve a maintenance dose of JJA venom of 50mcg, ie. the current standard of care.

Experimental: 50mcg JJA venom + 5mg delta-inulin - Subjects will receive semi-rush JJA VIT with delta-inulin (at a fixed dose of 5 mg with each dose of venom) aiming to achieve a maintenance dose of JJA venom of 50mcg (adjuvant comparison).


Treatment: Drugs: Delta-inulin
Addition of adjuvant, delta-inulin to JJA VIT regime, to determine if this will allow lower doses and shorter regimes to promote protective responses, reducing costs and morbidity of JJA VIT.

Other interventions: Dose finding comparison
Define minimum effective maintenance dose (50mcg vs 25mcg). In "real world" sting challenges after 12 months of JJA VIT objective systemic reaction rates after 50 and 100 mcg maintenance doses respectively 14/130 and 12/126 subjects vs reaction rates to stings in similar subjects without JJA VIT 70-76%. Venom delivery in sting likely <20mcg. Therefore minimum effective maintenance dose not yet defined.

Intervention code [1] 0 0
Treatment: Drugs
Intervention code [2] 0 0
Other interventions
Comparator / control treatment
Control group

Outcomes
Primary outcome [1] 0 0
Response to in-hospital JJA sting following 12 months of maintenance treatment - Number of subjects in each group experiencing systemic allergic reaction to in-hospital JJA sting after 12 months of maintenance treatment.
Timepoint [1] 0 0
15 months
Primary outcome [2] 0 0
Specific IgG4 responses to JJA venom during treatment - Specific IgG4 responses (mcgA/L) to JJA venom immunotherapy by group
Timepoint [2] 0 0
18 months
Primary outcome [3] 0 0
Specific IgE responses to JJA venom during treatment - Specific IgE responses (kU/L) to JJA venom immunotherapy by group
Timepoint [3] 0 0
18 months
Secondary outcome [1] 0 0
Changes in VST to JJA venom during treatment - Venom skin test responses (concentration of venom which results in a positive intradermal test - mcg/ml) to JJA venom immunotherapy by group
Timepoint [1] 0 0
15 months
Secondary outcome [2] 0 0
Adverse reactions to JJA venom immunotherapy - Number of events per group and number of subjects per group experiencing clinical adverse reactions attributable to JJA VIT
Timepoint [2] 0 0
18 months
Secondary outcome [3] 0 0
Incidental reactions to field stings during JJA venom immunotherapy - Number of events per group and number of subjects per group experiencing systemic allergic reactions to incidental JJA stings
Timepoint [3] 0 0
18 months

Eligibility
Key inclusion criteria
- Previous immediate systemic allergic reaction to definite or possible JJA sting.

- Venom-specific lgE response to JJA venom (by intradermal skin testing or serological
analysis).

- Age between 18 and 65 years at the time of starting treatment.

- Gives informed consent, including acknowledgement that any protection from JJA sting
anaphylaxis may be short lived and that JJA VIT and in particular, JJA sting
challenges have the potential to cause systemic allergic reactions, including
anaphylaxis.
Minimum age
18 Years
Maximum age
65 Years
Gender
Both males and females
Can healthy volunteers participate?
No
Key exclusion criteria
- Pregnant (women of child-bearing age will have a urine pregnancy test on first day of
treatment) or intended pregnancy during treatment.

- Beta-blocker, ACE-inhibitor or mono-amine oxidase therapy for any reason.

- Unstable heart disease.

- Poorly controlled lung disease; defined as being severe enough to cause breathlessness
on mild or moderate exertion, i.e. unable to walk up a modest incline.

- Any other chronic or severe medical condition which puts the patient at increased risk
if they participated in this study in the investigators opinion.

- Previous JJA VIT, any ongoing immunotherapy or use of immunosuppressive drugs.

- Raised baseline mast cell tryptase

Study design
Purpose of the study
Treatment
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Masking / blinding
Blinded (masking used)
Who is / are masked / blinded?
The people receiving the treatment/s


Intervention assignment
Parallel
Other design features
Phase
Phase 1/Phase 2
Type of endpoint(s)
Statistical methods / analysis

Recruitment
Recruitment status
Active, not recruiting
Data analysis
Reason for early stopping/withdrawal
Other reasons
Date of first participant enrolment
Anticipated
Actual
Date of last participant enrolment
Anticipated
Actual
Date of last data collection
Anticipated
Actual
Sample size
Target
Accrual to date
Final
Recruitment in Australia
Recruitment state(s)
SA
Recruitment hospital [1] 0 0
Royal Adelaide Hospital - Adelaide
Recruitment postcode(s) [1] 0 0
5000 - Adelaide

Funding & Sponsors
Primary sponsor type
Other
Name
Central Adelaide Local Health Network Incorporated
Address
Country
Other collaborator category [1] 0 0
Commercial sector/Industry
Name [1] 0 0
Vaxine Pty Ltd
Address [1] 0 0
Country [1] 0 0

Ethics approval
Ethics application status

Summary
Brief summary
The purpose of this study is to assess the potential use of delta-inulin as an adjuvant to
facilitate the desired immune response to Jack Jumper Ant (JJA) venom with a lower dose of
venom, thus reducing adverse reactions, venom requirements and costs of treatment.
Specifically we aim to compare outcomes of in-hospital JJA sting challenges and JJA venom
specific IgE, and IgG4 responses to semi-rush JJA VIT at maintenance doses of 25 and 50 mcg
of JJA venom, with and without delta-inulin adjuvant.
Trial website
https://clinicaltrials.gov/show/NCT03066986
Trial related presentations / publications
Public notes

Contacts
Principal investigator
Name 0 0
Pravin Hissaria, FRACP FRCPA
Address 0 0
Royal Adelaide Hospital and SA Pathology
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for public queries
Name 0 0
Address 0 0
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for scientific queries

Summary results
Other publications