Adenovirus Vaccine for Malaria

Not Recruiting

Trial ID: NCT00371189

Purpose

Malaria is caused by a parasite carried by a mosquito. Currently, there is no vaccine licensed to prevent malaria. The purpose of this study is to find the most effective and safest dose of an experimental vaccine for the treatment of malaria. Participants will include 72 healthy adults, ages18 to 45, enrolled at Vanderbilt University Medical Center and Stanford University. Volunteers will receive 3 doses of either the malaria vaccine or placebo (contains no vaccine) by injection into a muscle at 0, 1 and 6 months. Investigators will evaluate how the body responds to increasing dosage strengths of the vaccine. Study procedures include physical exam, multiple blood draws, and completion of a memory aid (diary). Each participant will be actively involved in the study for about 12 months. Then, an annual phone call will be made to check for any serious illness events for a period of 5 years.

Official Title

A Phase I Randomized, Controlled, Dosage-Escalation Trial to Evaluate the Immunogenicity, Safety, and Reactogenicity of an Adenovirus Type 35 Based Circumsporozoite Malaria Vaccine in Healthy Adults 18 to 45 Years of Age

Stanford Investigator(s)

Dora Ho
Dora Ho

Clinical Professor, Medicine - Infectious Diseases

Eligibility

Inclusion Criteria:

* Provision of informed consent before any protocol procedures are performed.
* Males and non-pregnant females between the ages of 18 and 45 years, inclusive.
* Females and males must agree to practice adequate contraception until at least 28 days following their last immunization dose (including abstinence; hormonal contraception; condoms with spermicidal agents; post-menopausal; or surgical sterilization/vasectomy).
* Participants must agree to avoid high risk sexual behavior for exposure to human immunodeficiency virus (HIV).
* In good health as determined by screening medical history, physical examination (PE), and laboratory assessments.
* Willingness to comply with protocol requirements.
* Willingness to be contacted annually for five years for assessment of serious adverse events.
* Must have access to a cell phone.

Exclusion Criteria:

* Current or recent (within the last four weeks) treatment with parenteral, inhaled, or oral corticosteroids (intranasal steroids are acceptable), or other immunosuppressive agents, or chemotherapy.
* History of splenectomy.
* Abnormal screening laboratory values. Any abnormal screening value for any screening test will exclude the subject from the study. Abnormal screening labs will not be repeated with the exception of high glucose levels will be repeated at a fasting state.
* Detectible neutralizing antibody titer against adenovirus serotype 35.
* History of intravenous (IV) drug abuse.
* History of, or current medical, occupational, social or family problems as a result of alcohol or illicit drug use.
* History of moderate to severe mental illness, as defined by symptoms interfering with social or occupational function or suicidal thoughts/attempts.
* History of receiving blood or blood products (such as blood transfusion, platelet transfusion, immunoglobulins, hyperimmune serum) in the previous 6 months.
* Vaccination with a live vaccine within the past 30 days or with a nonreplicating, inactivated, or subunit vaccine within the last 14 days.
* Known hypersensitivity to components of the vaccine.
* History of acute or chronic medical conditions including, but not limited to, disorders of the liver, kidney, lung, heart, or nervous system, or other metabolic or autoimmune/inflammatory conditions.
* History of coagulation defect or bleeding from (bruising at) multiple sites that cannot be linked to trauma or surgery.
* History of anaphylaxis or severe hypersensitivity reaction.
* Severe asthma, as defined by an emergency room visit or hospitalization within the last 12 months.
* Pregnant or breastfeeding women.
* Acute illness, including temperature greater than 100 degrees Fahrenheit within one week prior to vaccination.
* Positive serology for human immunodeficiency virus (HIV), hepatitis C virus (HCV), or hepatitis B surface antigen (HBsAg).
* Concurrent participation in other investigational protocols or receipt of an investigational product within the previous 30 days or planned receipt of an investigational product within 28 days following the last immunization dose.
* Identification of any condition that, in the opinion of the investigator, would affect the ability of the subject to understand or comply with the study protocol or would jeopardize the safety or rights of a subject participating in the study.
* History of malignancy, including hematologic and skin cancers (except for a localized basal cell carcinoma), or known immunodeficiency syndrome.
* History of malaria infection or previous receipt of a malaria vaccine.
* History of travel to malaria-endemic area or receipt of antimalarial prophylaxis in the past 12 months.
* Planned travel to a malaria-endemic area prior to Visit 16 (Day 208).
* Pre-medication with analgesic or antipyretic agents in the 6 hours prior to vaccination, or planned medication with analgesic or antipyretic in the 24 hours following vaccination. This criterion should not preclude subjects receiving such medication if the need arises.
* Receipt of a recombinant adenovirus vector vaccine in a prior study.

Intervention(s):

drug: Placebo

biological: Ad35.CS.01 Circumsporozoite Malaria Vaccine

Not Recruiting

Contact Information

Stanford University
School of Medicine
300 Pasteur Drive
Stanford, CA 94305
Stanford-LPCH Vaccine Program
6504987284