Sm-p80 Schistosomiasis Challenge Study (NCT05999825) | Clinical Trial Compass
UnknownPhase 2
Sm-p80 Schistosomiasis Challenge Study
48 participantsStarted 2024-09
Plain-language summary
The goal of this clinical trial is to learn about the Sm-p80 + GLA-SE (Schistoshield®) vaccine in healthy participants who have not had schistosomiasis before. The main questions it aims to answer are:
* if the vaccine is safe
* if after vaccinated people start producing antibodies
* if the vaccine works against schistosomiasis.
Participants will receive three vaccines (or placebo) and are then exposed to 20 male Schistosoma cercariae. Afterwards they are treated with praziquantel to cure the infection.
Researchers will compare the group vaccinated with Schistoshield® and placebo (fake vaccination) to see if the vaccine has worked.
Who can participate
Age range18 Years – 45 Years
SexALL
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Inclusion criteria
✓. Subject is aged ≥ 18 and ≤ 45 years and in good health.
âś“. Subject has adequate understanding of the procedures of the study and agrees to abide strictly thereby.
âś“. Subject is able to communicate well with the investigator, is available to attend all study visits.
âś“. Subject will not travel to Schistosoma-endemic countries up until treatment at week 24.
âś“. Subject agrees to refrain from blood and plasma donation to Sanquin or for other purposes throughout the study period.
âś“. For female subjects: subject agrees to use adequate contraception and not to breastfeed for the duration of study.
âś“. Subject has signed informed consent.
Exclusion criteria
âś•. 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, (severe) psychiatric and other disorders, which could compromise the health of the participant during the study or interfere with the interpretation of the study results. These include, but are not limited to, any of the following:
âś•. The chronic use of any drug known to interact with praziquantel, artesunate or lumefantrine metabolism (e.g. phenytoĂŻn, carbamazepine, phenobarbital, primidon, dexamethason, rifampicine, cimetidine, flecaĂŻnide, metoprolol, imipramine, amitriptyline, clomipramine, class IA and III anti-arrythmics, antipsychotics, antidepressants, macrolides, fluorchinolones, imidazole- and triazole antimycotics, antihistamines). Because lumefantrine may cause extension of QT-time, chronic use of drugs with effect on QT interval will result in exclusion from study participation.
âś•. Any planned vaccination within 28 days before the start of the trial until the end of the immunisation phase (week 12), with the exception of SARS-CoV-2 vaccines or influenza vaccines.
âś•. For female subjects: positive serum pregnancy test on the day before first immunisation.
âś•. Any history of schistosomiasis or treatment for schistosomiasis.
âś•. Positive serology for schistosomiasis or elevated serum CAA at screening.
âś•. Known hypersensitivity to or contra-indications (including co-medication) for use of praziquantel, artesunate or lumefantrine.
âś•. Being an employee or student of the department of Parasitology or Infectious diseases of the LUMC.