A Phase 2 interventional study of ChAd63-KH and Placebo in Leishmaniasis, Cutaneous, sponsored by University of York. Completed at 1 site in Sudan. Open to participants aged 12 Years to 50 Years. Per ClinicalTrials.gov, last updated 2023-05-26.
Sponsored by University of York · Phase 2, Interventional, and Treatment
This trial is designed to assess the therapeutic efficacy and safety of CHAd63-KH, a new candidate Leishmania vaccine, in patients with persistent PKDL. 100 participants will be randomly assigned (50 participants in each arm) to receive placebo or ChAd63-KH 7.5 x10(10)vp. Doses will be administered at a single time point.
This study is a randomised, double blinded, placebo controlled trial designed to assess the therapeutic efficacy and safety of CHAd63-KH, a new candidate Leishmania vaccine, in patients with persistent PKDL. 100 participants will be randomly assigned (50 participants in each arm) to receive placebo or ChAd63-KH 7.5 x10(10)vp intramuscular injection into the deltoid region. Doses will be administered at a single time point. Volunteers aged between 12-50 years with persistent PKDL will be recruited at Professor El-Hassan's Centre for Tropical Medicine, Dooka, Gedarif State, Sudan, and will be followed up for 120 days after the dosing visit. The trial is planned to run for 24 months.
Secondary objectives are as follows:
103 studies on the registry are indexed under Leishmaniasis, Cutaneous; 18 are open to participants now.
This study's enrollment of 86 is above the median of 60 across 77 interventional studies indexed under Leishmaniasis, Cutaneous.
Browse Leishmaniasis, Cutaneous studies →University of York is the lead sponsor of 11 studies on the registry; none are open to participants now.
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Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
The volunteer must be:
All Participants
Exclusion Criteria:
The volunteer may not enter the study if any of the following apply:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
Vaccines made with a weakened form of the germ, such as measles–mumps–rubella (MMR), chickenpox and yellow fever. They can be risky when the immune system is weakened. Flu injections are not live; the nasal flu spray is.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HIV
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis B tests
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis C tests
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Biopsy and archival tissue
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Live vaccines
Vaccines made with a weakened form of the germ, such as measles–mumps–rubella (MMR), chickenpox and yellow fever. They can be risky when the immune system is weakened. Flu injections are not live; the nasal flu spray is.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Immunosuppression
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
BMI (body mass index)
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ChAd63 KH 7.5x1010 vp, single dose, by IM injection
Biological: ChAd63-KH
Normal Saline, single dose, by IM injection
Other: Placebo
The vaccine will be injected intramuscularly into the arm.
The placebo will be injected intramuscularly into the arm.
To assess the number of participants with treatment-related adverse events as defined in the clinical trial protocol V1.0.
To assess the number of participants with treatment-related adverse events as defined in the clinical trial protocol V1.0.
Time frame: 24 months
To assess the therapeutic efficacy of CHAd63-KH, a new candidate, in patients with PKDL by clinical judgement of PKDL lesion reduction.
To assess the therapeutic efficacy of CHAd63-KH, a new candidate, in patients with PKDL by clinical judgement of PKDL lesion reduction.
Time frame: 24 months
Immune responses by presence of interferon gamma producing T cells
To identify cellular immune responses generated by the candidate vaccine in patients with persistent PKDL using a gamma interferon ELISpot assay
Time frame: 24 months
Immune responses by presence of serum antibodies against Leishmania peptides
To identify humoral immune responses generated by the candidate vaccine in patients with persistent PKDL using a gamma interferon ELISpot assay
Time frame: 24 months
Clinical changes in PKDL disease
To observe any changes in the appearance of the cutaneous PKDL disease over a 120 day period following vaccination.
Time frame: 24 months
Plan to share: No
No publications or documents are linked to this record.
This study is completed, as verified in May 2023. You cannot join it, but the record below documents what was studied.
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Studies of the drug tested here: CHAD63
University of York