Safety and Immunogenicity of the LEISH-F2 + MPL-SE Vaccine With SSG for Patients With PKDL

Phase 1, Randomized, Double-blind, Placebo-controlled Study to Evaluate the Safety, Tolerability, and Immunogenicity of the LEISH-F2 + MPL-SE Vaccine in Combination With SSG in the Treatment of Patients With PKDL

A phase 1, randomized, double-blind, placebo-controlled study to evaluate the safety, tolerability, and immunogenicity of three injections of 10 µg LEISH-F2 + 25 µg MPL-SE given at 14-day intervals as an adjunct to standard chemotherapy with sodium stibogluconate (20 mg/kg/day for 40 days) in patients with PKDL.

Study Overview

• Status: Completed
• Conditions: Post Kala Azar Dermal Leishmaniasis
• Intervention / Treatment: Biological: LEISH-F2 + MPL-SE vaccine

• Study Type: Interventional
• Enrollment (Actual): 42
• Phase: Phase 1

Contacts and Locations

Study Locations

• Sudan
  • Khartoum, Sudan
    • IEND

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 7 years to 40 years (Child, Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Males and females = 7 years and < 40 years of age.
• Must have a skin rash of > 6 months duration compatible with a diagnosis of PKDL following a history of successful treatment of VL, and histopathology consistent with PKDL (Section 6.1).
• Female patients of child bearing age must have a negative serum pregnancy test at screening, a negative urine pregnancy test within 24 hours before study injection, must not be breast-feeding, and are required to use adequate contraception through Day 59 of the study. These precautions are necessary due to unknown effects that LEISH-F2 + MPL-SE might have in a fetus or newborn infant.
• The following laboratory blood tests must have values within the normal ranges at screening (Appendix 3): sodium, potassium, urea, total bilirubin, glucose, creatinine, hemoglobin and platelet count. ALT, AST, alkaline phosphatase, and total WBC count values (commonly elevated in PKDL patients) must be below grade 2 at screening (Appendix 3).
• The following serology tests must be negative at screening: HIV 1/2 (in patients >14 years of age), hepatitis B surface antigen (HBsAg), and hepatitis C virus (HCV) antibody. All patients (or their parents) will receive HIV-related counseling prior to testing. Patients with positive HIV test results will receive counseling at the University and will be referred to the national AIDS control program for treatment if appropriate.
• Normal ECG.
• Potential study patients (or their guardians) must give written informed consent, be willing to be admitted to hospital for a minimum of 40 days and up to 60 days, able to attend all required follow-up visits, have a permanent address, and be reachable by study site personnel.

Exclusion Criteria:

• Presence of other skin conditions.
• Anti-leishmanial treatment within the past 30 days.
• History of previous exposure to Leishmania vaccines.
• Known use of injected or oral corticosteroids within 6 weeks prior to the first administration of study injection.
• Participation in another experimental protocol or receipt of any investigational products within 30 days prior to the first administration of study injection.
• History of autoimmune disease or other causes of immunosuppressive states.
• History or evidence of any acute or chronic illness that, in the opinion of the Principal Investigator, may interfere with the evaluation of the safety or the immunogenicity of the vaccine. (Patients presenting with concomitant illness will be referred for standard clinical care).
• History of use of any medication that, in the opinion of the Principal Investigator, may interfere with the evaluation of the safety or the immunogenicity of the vaccine.
• History of significant psychiatric illness.
• Known to be a current drug or alcohol abuser.
• Patients with a history of previous anaphylaxis, severe allergic reaction to vaccines or unknown allergens, or allergic reaction to eggs.
• Patients who are unlikely to cooperate with the requirements of the study protocol.
• Known allergy or contraindication to SSG.
• Regardless of eligibility, standard clinical care will be provided (at no cost to the patient) to all PKDL patients screened for participation in the study.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Triple

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Evaluate the safety of the vaccine given as 3 sc injections every 14 days in combination with standard SSG therapy in patients with persistent PKDL.	one year

Secondary Outcome Measures

Outcome Measure	Time Frame
Assess the effect of the vaccine on the clinical course of PKDL.	one year
To evaluate the immunogenicity of the vaccine by evaluating antibody and T-cell responses to the LEISH-F2 protein and Soluble Leishmania Antigen (SLA).	one year

Collaborators and Investigators

• Sponsor: IDRI
• Investigators: Principal Investigator: Eltahir AG Khalil, MBBS, IEND

Study record dates

Study Major Dates

• Study Start: April 1, 2009
• Primary Completion (Actual): April 1, 2011
• Study Completion (Actual): April 1, 2011

Study Registration Dates

• First Submitted: September 21, 2009
• First Submitted That Met QC Criteria: September 22, 2009
• First Posted (Estimate): September 23, 2009

Study Record Updates

• Last Update Posted (Estimate): June 27, 2011
• Last Update Submitted That Met QC Criteria: June 23, 2011
• Last Verified: June 1, 2011

More Information

Terms related to this study

• Keywords: PKDL
• Additional Relevant MeSH Terms: Skin Diseases; Infections; Vector Borne Diseases; Parasitic Diseases; Protozoan Infections; Skin Diseases, Parasitic; Skin Diseases, Infectious; Euglenozoa Infections; Leishmaniasis; Leishmaniasis, Visceral
• Other Study ID Numbers: IDRI-LVPTC-107