A Phase 1 interventional study of LepVax (2 μg LEP-F1 + 5 μg GLA-S): Low dose and LepVax (10 μg LEP-F1 + 5 μg GLA-SE): High dose in Leprosy, sponsored by The Immunobiological Technology Institute (Bio-Manguinhos) / Oswaldo Cruz Foundation (Fiocruz). Not yet recruiting at 1 site in Brazil. Open to participants aged 18 Years to 55 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2024-10-04.
Sponsored by The Immunobiological Technology Institute (Bio-Manguinhos) / Oswaldo Cruz Foundation (Fiocruz) · Phase 1, Interventional, and Prevention
This is a phase 1b, double-blind, randomized, placebo-controlled clinical trial to evaluate the safety, tolerability, and immunogenicity of LEP-F1 + GLA-SE compared to placebo administered as three intramuscular (IM) injections in adult participants aged 18 to 55.
The LepVax Clinical Development Plan includes two indications for use. The first would be the prophylactic indication, where individuals at greater risk, such as contacts of patients affected by leprosy and who may be subclinically infected with M. leprae, would be vaccinated. This concept is not unique and many countries, such as Brazil, re-immunize leprosy patients and their close contacts with BCG (5, 12, 13). The proposed clinical trial, however, is to establish an initial safety profile in a leprosy endemic region where healthy adults will be included. The second use indication is for therapeutic indication of the vaccine that would be an adjuvant to the current treatment for leprosy. After vaccine safety is established, phase 2 protocols in leprosy patients will be proposed to assess vaccine dose and safety in this population, and then move on to phase 3, where vaccine efficacy will be evaluated.
This phase 1b, double-blind, randomized, placebo-controlled clinical trial will evaluate the safety, tolerability, and immunogenicity of LEP-F1 + GLA-SE in healthy adults. Two dose levels of LEP-F1 will be tested (2 and 10 µg of LEP-F1) and a fixed dose of 5 µg of GLA-SE in adults. These doses were selected because they demonstrated an acceptable safety and immunogenicity profile in the LEPVPX-118 study, the first clinical trial in humans. This study will establish a safety and immunogenicity profile in an endemic population that will allow the vaccine to advance in clinical development.
Participants will be randomized within each Group to receive three doses of vaccine or placebo administered IM on Days 0, 28, and 56. Participants will be monitored for one year following the last study injection, including safety laboratory analyses 7 days following each study injection. Blood samples will be obtained for immunological assays at Days 0, 35, 63, and 168.
52 studies on the registry are indexed under Leprosy; 13 are open to participants now.
This study's planned enrollment of 54 is below the median of 70 across 41 interventional studies indexed under Leprosy.
Browse Leprosy studies →The Immunobiological Technology Institute (Bio-Manguinhos) / Oswaldo Cruz Foundation (Fiocruz) is the lead sponsor of 28 studies on the registry; 5 are open to participants now.
Counted across the registry records on this site, refreshed daily.
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.
Exclusion Criteria:
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.
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).
Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.
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.
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.
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
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.
Childbearing potential
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ALT and AST (liver enzymes)
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Bilirubin
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hemoglobin (Hb)
The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Platelets
Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.
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.
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.
Corticosteroids (steroids)
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Autoimmune disease
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
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.
Participants will be randomized within each Group to receive three doses of vaccine administered IM on Days 0, 28, and 56. Participants will be monitored for one year following the last study injection, including safety laboratory analyses 7 days following each study injection. Blood samples will be obtained for immunological assays at Days 0, 35, 63, and 168.
Drug: LepVax (2 μg LEP-F1 + 5 μg GLA-S): Low dose · Drug: LepVax (10 μg LEP-F1 + 5 μg GLA-SE): High dose
Participants will be randomized within each Group to receive three doses of placebo administered IM on Days 0, 28, and 56. Participants will be monitored for one year following the last study injection, including safety laboratory analyses 7 days following each study injection. Blood samples will be obtained for immunological assays at Days 0, 35, 63, and 168.
Other: Placebo Comparator: Placebo
2 μg LEP-F1 + 5 μg GLA-SE will be administered by IM injection on Days 0,28, and 56 in healthy participants.
Also known as: LepVax
10 μg LEP-F1 + 5 μg GLA-SE will be administered by IM injection on Days 0,28, and 56 in healthy participants.
Also known as: LepVax
Sterile normal saline for injection will be administered by IM injection on Days 0, 28, and 56 in healthy participants and paucibacillary leprosy patients.
Also known as: Sterile normal saline for injection.
Phase 1b_The number of participants who receive the injection and experience local and systemic reactions within 7 days of each study injection.
The number of participants who receive the injection and experience local and systemic reactions within 7 days of each study injection.
Time frame: 7 days following each injection
Phase 1b_Number of participants experiencing unsolicited AEs
The number of participants spontaneously reporting adverse events from Day 0 to Day 84.
Time frame: Day 0 to Day 84 following each injection
Phase 1b_The number of physician-attended adverse events
The number of physician-attended adverse events considered to be related to any of the study injections reported at any time during the study period.
Time frame: Through study completion, an average of 1 year
Phase 1b_IgG antibody responses to LEP-F1 by ELISA on Days 0, 35, 63,and 168.
IgG antibody responses to LEP-F1 by ELISA on Days 0, 35, 63, and 168
Time frame: Days 0, 35, 63 and 168
Phase 1b_ The T cell responses measured by LEP-F1-specific cytokine production in PBMC assay by ELISA or multiplex assay on Days 0, 35, 63,and 168.whole blood assay
The T cell responses measured by LEP-F1-specific cytokine production in PBMC assay by ELISA or multiplex assay on Days 0,35, 63, and 168.
Time frame: Days 0, 35, 63 and 168
The T cell responses measured by multiparametric flow cytometry in PBMCs
The T cell responses measured by multiparametric flow cytometry in PBMCs on Days 0, 35, 63, and 168.
Time frame: Days 0,35,63 and 168
Phase 1b_The assays of candidate biomarkers measured on Day 0 and 63 including gene expression signatures and serum protein multiplex assay.
The assays of candidate biomarkers measured on Day 0 and 63 including gene expression signatures and serum protein multiplex assay.
Time frame: Day 0 and 63]
Plan to share: No
This study is not yet recruiting, as verified in Jan 2024. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
The Immunobiological Technology Institute (Bio-Manguinhos) / Oswaldo Cruz Foundation (Fiocruz)