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Trial details imported from ClinicalTrials.gov

For full trial details, please see the original record at https://clinicaltrials.gov/study/NCT01661933




Registration number
NCT01661933
Ethics application status
Date submitted
6/08/2012
Date registered
10/08/2012
Date last updated
20/10/2014

Titles & IDs
Public title
Desensitising Celiac Disease Patients With the Human Hookworm
Scientific title
Combining Necator Americanus With Trace Gluten to Restore Tolerance in Coeliac Disease: a Pilot Clinical and a Detailed in Vitro Immunological Study.
Secondary ID [1] 0 0
AU/3/BOBD012
Universal Trial Number (UTN)
Trial acronym
NaCeD
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Celiac Disease 0 0
Condition category
Condition code
Inflammatory and Immune System 0 0 0 0
Autoimmune diseases
Oral and Gastrointestinal 0 0 0 0
Other diseases of the mouth, teeth, oesophagus, digestive system including liver and colon
Human Genetics and Inherited Disorders 0 0 0 0
Other human genetics and inherited disorders

Intervention/exposure
Study type
Interventional
Description of intervention(s) / exposure
Treatment: Other - Necator americanus
Treatment: Other - Necator americanus

Experimental: Necator americanus, gluten challenge - Single arm, vertical.


Treatment: Other: Necator americanus
Previously inoculated subjects will be further inoculated as previously undertaken with 20 3rd stage infective Na larvae (10 + 10 over 4 weeks). Four weeks after the 2nd inoculation, each participant will receive a micro-dose of gluten (10 mg daily) as pasta for 8 weeks, to be followed by a low-dose of gluten (50 mg daily) for 8 weeks. After this, a detailed assessment involving upper endoscopy and duodenal biopsy will be performed before deciding on an individual case basis that it is safe for the participant to proceed to challenge. A gluten challenge of 1 G (15-20 G of pasta or a ½ slice of standard white bread) twice weekly for 12 weeks will commence.

Treatment: Other: Necator americanus
After completion of the previously planned challenge, volunteers will be invited to extend the gluten challenge. The extension is for 4 weeks total. The gluten challenge is stepwise: gluten 10 mg daily for one week, 50 mg daily for one week and finally 3 grams daily for 2 weeks. The outcome measure is serum tissue transglutaminase to be compared before and after the intervention.
Intervention code [1] 0 0
Treatment: Other
Comparator / control treatment
Control group

Outcomes
Primary outcome [1] 0 0
Duodenal Villus Height:Crypt Depth
Timepoint [1] 0 0
Week -24 to -36
Secondary outcome [1] 0 0
Intraepithelial Lymphocyte Count
Timepoint [1] 0 0
Week-24 and -36
Secondary outcome [2] 0 0
Number of Participants With 2 Points Increase in Marsh Score Post GC-1g
Timepoint [2] 0 0
Longitudinal change between week-24 and week-36
Secondary outcome [3] 0 0
Serum Anti-tissue Transglutaminase Antibodies Measured as International Units/mL (IU/mL)
Timepoint [3] 0 0
Anti-tTG IU/mL levels pre-trial, mid-trial and after 3 gram/day gluten challenge

Eligibility
Key inclusion criteria
* Previously enrolled adults who received an experimental hookworm infection with diet treated celiac disease.
Minimum age
18 Years
Maximum age
No limit
Sex
Both males and females
Can healthy volunteers participate?
No
Key exclusion criteria
* Immune suppressive therapies

Study design
Purpose of the study
Prevention
Allocation to intervention
Not applicable
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 assessing the outcomes
Intervention assignment
Single group
Other design features
Phase
Phase 1
Type of endpoint/s
Statistical methods / analysis

Recruitment
Recruitment status
Completed
Data analysis
Reason for early stopping/withdrawal
Other reasons
Date of first participant enrolment
Anticipated
Actual
1/08/2012
Date of last participant enrolment
Anticipated
Actual
Date of last data collection
Anticipated
Actual
1/03/2014
Sample size
Target
Accrual to date
Final
12
Recruitment in Australia
Recruitment state(s)
QLD
Recruitment hospital [1] 0 0
Prince Charles Hospital - Chermside
Recruitment postcode(s) [1] 0 0
4032 - Chermside

Funding & Sponsors
Primary sponsor type
Government body
Name
The Prince Charles Hospital
Address
Country
Other collaborator category [1] 0 0
Other
Name [1] 0 0
National Health and Medical Research Council, Australia
Address [1] 0 0
Country [1] 0 0

Ethics approval
Ethics application status

Summary
Brief summary
We have established that the hookworm Necator americanus (Na) dramatically alters the local and systemic immune landscape of the infected human host. Consistent with the principle of desensitisation, diet managed celiac disease subjects previously infected by us with Na will be invited to receive small incremental doses of gluten as pasta (3-25 mm straw of spaghetti) over 16 weeks. Each participant will then be carefully re-assessed to determine if it is appropriate to undertake a 12-week gluten challenge.
Trial website
https://clinicaltrials.gov/study/NCT01661933
Trial related presentations / publications
Daveson AJ, Jones DM, Gaze S, McSorley H, Clouston A, Pascoe A, Cooke S, Speare R, Macdonald GA, Anderson R, McCarthy JS, Loukas A, Croese J. Effect of hookworm infection on wheat challenge in celiac disease--a randomised double-blinded placebo controlled trial. PLoS One. 2011 Mar 8;6(3):e17366. doi: 10.1371/journal.pone.0017366.
Public notes

Contacts
Principal investigator
Name 0 0
John Croese, MD
Address 0 0
The Prince Charles Hospital, Centre for Biodiscovery and Molecular Development of Therapeutics
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

For IPD and results data, please see https://clinicaltrials.gov/study/NCT01661933