CAP256J3LS

Background:
HIV (human immunodeficiency virus) is the virus that causes AIDS (acquired immunodeficiency syndrome). Researchers want to find new ways to treat or prevent HIV infection. CAP256J3LS is a new product that uses antibodies. Antibodies are naturally occurring proteins; they target and disable disease-causing agents such as viruses. This new product may be able to stop HIV infections.
Objective:
To test the safety of CAP256J3LS in healthy people.
Eligibility:
People aged 18 to 60 years in good general health.
Design:
CAP256J3LS can be administered in 2 ways: (1) by a shot under the skin into the belly fat or (2) through a tube inserted into a vein in the arm. Participants will be divided into 6 groups: The study will open with the lowest dose of study product. The dose groups are spaced out to allow the study team to look over the safety data in each group. If there are no safety concerns in the lowest dose, then the next higher dose groups will be enrolled. This pattern will continue until all dose groups are enrolled. Also, some participants will receive only 1 dose; others will receive 3 doses, each spaced 12 weeks apart.
Those who receive only 1 dose of the study drug will have 14 clinic visits over 6 months. Those who get 3 doses will have 27 visits over 11 months. Participants will provide blood samples at each visit. Urine samples may also be needed.
All participants will get a thermometer and a measuring tool. They will measure any redness, swelling, or bruising they have at the injection site. They will check their temperature every day for 7 days after receiving the study drug. They will record their highest temperatures and any symptoms they have....