- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03257072
Repeated Controlled Human Hookworm Infection (ReCHHI1)
Repeated Controlled Human Hookworm Infection in Healthy Dutch Volunteers
Study Overview
Status
Conditions
Detailed Description
Twenty-four volunteers will be allocated equally into three groups (i.e. group A, B, C). Group A, B, and C will have one, two, and three infections respectively. Every infection will be performed with 50 L3 Necator americanus larvae. Group A will receive infection at week 4 only. Group B will be infected at week 2 and week 4. Group C will be infected at week 0, 2 and 4. To maintain blinding, group A and B will receive mock infections with water at week 0 and week 0 and 2 respectively. The interval between each CHHI is 2 weeks. Before every infection, the safety will be assessed by a review of adverse events data with a local safety monitor.
Sixteen weeks after the last infection (week 20), all volunteers will be offered treatment with a 3-day regimen of albendazole to abrogate infection. Volunteers with average egg counts >250 eggs per gram will be asked if they would be willing to keep their infection for a maximum of two years (chronic donors). No more than four volunteers will be selected to be chronic donors. Six months after the last infection (or after the last donation for the chronic donors) volunteers will undergo their last visit.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
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-
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Leiden, Netherlands, 2333 ZA
- Leiden University Medical Center
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Subject is aged ≥ 18 and ≤ 45 years and in good health.
- Subject has adequate understanding of the procedures of the study and agrees to abide strictly thereby.
- Subject is able to communicate well with the investigator, is available to attend all study visits.
- Subject agrees to refrain from blood donation to Sanquin or for other purposes throughout the study period.
- For female subjects: subject agrees to use adequate contraception and not to breastfeed for the duration of study.
- Subject has signed informed consent.
Exclusion Criteria:
Any history, or evidence at screening, of clinically significant symptoms, physical signs or abnormal laboratory values suggestive of systemic conditions, such as cardiovascular, pulmonary, renal, hepatic, neurological, dermatological, endocrine, malignant, haematological, infectious, immune-deficient, psychiatric and other disorders, which could compromise the health of the volunteer during the study or interfere with the interpretation of the study results. These include, but are not limited to, any of the following:
- Body Mass Index (BMI) <18.0 or >30.0 kg/m2 at screening;
- positive HIV, HBV or HCV screening tests;
- the use of immune modifying drugs within three months prior to study onset (inhaled and topical corticosteroids and oral anti-histamines exempted) or expected use of such during the study period;
- having one of the following laboratory abnormalities: ferritine <10 ug/L, transferrine <2.04 g/L or Hb <7.0 mmol/L for females or <8.0 mmol/L for males;
- history of malignancy of any organ system (other than localized basal cell carcinoma of the skin), treated or untreated, within the past 5 years;
- any history of treatment for severe psychiatric disease by a psychiatrist in the past year;
- history of drug or alcohol abuse interfering with normal social function in the period of one year prior to study onset.
- Known hypersensitivity to or contra-indications for use of albendazole, including co-medication known to interact with albendazole metabolism (e.g. carbamazepine, phenobarbital, phenytoin, cimetidine, theophylline, dexamethasone)
- Known allergy to amphotericin B or gentamicin
- For female subjects: positive urine pregnancy test at screening
- Positive faecal qPCR or Kato-Katz for hookworm at screening, any known history of hookworm infection or treatment for hookworm infection or possible exposure to hookworm in the past
- Being an employee or student of the department of parasitology of the LUMC
- Current or past scars, tattoos, or other disruptions of skin integrity at the intended site of larval application
- Subjects with planned travel to hookworm endemic areas during this trial
- Receipt of a vaccine within 4 weeks prior to the study initiation
- Known food allergy
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Diagnostic
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Triple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: A: 50 Necator americanus L3 larvae
Mock infections with water at week 0 and 2, infection with 50 Necator americanus L3 larvae at week 4
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1x50 Necator americanus L3 larvae
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Experimental: B: 100 Necator americanus L3 larvae
Mock infections with water at week 0, infection with 50 Necator americanus L3 larvae at week 2 and 4
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2x50 Necator americanus L3 larvae
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Experimental: C: 150 Necator americanus L3 larvae
Infection with 50 Necator americanus L3 larvae at week 0, 2 and 4
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3x50 Necator americanus L3 larvae
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Frequency of adverse events
Time Frame: 28 weeks
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Frequency of adverse events as compared between study groups A, B and C.
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28 weeks
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Magnitude of adverse events
Time Frame: 28 weeks
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Magnitude of adverse events as compared between study groups A, B and C.
|
28 weeks
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Variability in egg secretion
Time Frame: 20 weeks
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Variability in egg secretion by Kato-Katz from week 16 to 20
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20 weeks
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Lowest dose at which there is 100% patent hookworm infection
Time Frame: 20 weeks
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The lowest dose at which there is 100% patent hookworm infection, as defined by a positive Kato-Katz at any time between week 16 to 20
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20 weeks
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Comparison of the average number of eggs secreted
Time Frame: 20 weeks
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Comparison of the average number of eggs secreted by Kato-Katz and qPCR between different groups in weeks 16-20 after the infection
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20 weeks
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Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Meta Roestenberg, MD. PhD., LUMC
Publications and helpful links
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- ReCHHI1
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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