A Clinical Trial in Healthy, HIV-1-Uninfected Adult Participants to Compare the Safety, Tolerability and Immunogenicity of CH505TF gp120 Produced From Stably Transfected Cells to CH505TF gp120 Produced From Transiently Transfected Cells

Inclusion Criteria

General and Demographic Criteria

• Age of 18 to 50 years
• Access to a participating HIV Vaccine Trials Network (HVTN) clinical research site (CRS) and willingness to be followed for the planned duration of the study
• Ability and willingness to provide informed consent
• Assessment of understanding: volunteer demonstrates understanding of this study; completes a questionnaire prior to first vaccination with verbal demonstration of understanding of all questionnaire items answered incorrectly
• Willing to be contacted in person or by phone, text message, or e-mail 6 months after completion of the scheduled clinic visits
• Agrees not to enroll in another study of an investigational research agent before the last required protocol clinic visit
• Good general health as shown by medical history, physical exam, and screening laboratory tests

HIV-Related Criteria

• Willingness to receive HIV test results
• Willingness to discuss HIV infection risks and amenable to HIV risk reduction counseling
• Assessed by the clinic staff as being at "low risk" for HIV infection and committed to maintaining behavior consistent with low risk of HIV exposure through the last required protocol clinic visit. (see study protocol)

Laboratory Inclusion Values

Hemogram/Complete blood count (CBC)

• Hemoglobin greater than or equal to 11.0 g/dL for volunteers who were assigned female sex at birth, greater than or equal to 13.0 g/dL for volunteers who were assigned male sex at birth. For transgender participants who have been on hormone therapy for more than 6 consecutive months, determine hemoglobin eligibility based on the gender with which they identify (ie, a transgender female who has been on hormone therapy for more than 6 consecutive months should be assessed for eligibility using the hemoglobin parameters for persons assigned female sex at birth).
• White blood cell count equal to 3,300 to 12,000 cells/mm^3
• Total lymphocyte count greater than or equal to 800 cells/mm^3
• Remaining differential either within institutional normal range or with site physician approval
• Platelets equal to 125,000 to 550,000/mm^3

Chemistry

• Chemistry panel: alanine aminotransferase (ALT), aspartate aminotransferase (AST), and alkaline phosphatase less than 1.25 times the institutional upper limit of normal; creatinine less than or equal to institutional upper limit of normal.

Virology

• Negative HIV-1 and -2 blood test: US volunteers must have a negative US Food and Drug Administration (FDA)-approved enzyme immunoassay (EIA).
• Negative Hepatitis B surface antigen (HBsAg)
• Negative anti-Hepatitis C virus antibodies (anti-HCV), or negative HCV polymerase chain reaction (PCR) if the anti-HCV is positive

Urine

• Normal urine:
• Negative urine glucose, and
• Negative or trace urine protein, and
• Negative or trace urine hemoglobin (if trace hemoglobin is present on dipstick, a microscopic urinalysis with red blood cells levels within institutional normal range).

Reproductive Status

• Volunteers who were assigned female sex at birth: negative serum or urine beta human chorionic gonadotropin (β-HCG) pregnancy test performed prior to vaccination on the day of initial vaccination. Persons who are NOT of reproductive potential due to having undergone total hysterectomy or bilateral oophorectomy (verified by medical records), are not required to undergo pregnancy testing.
• Reproductive status: A volunteer who was assigned female sex at birth must:
• Agree to use effective contraception for sexual activity that could lead to pregnancy from at least 21 days prior to enrollment until 3 months after the final study vaccination. Effective contraception is defined as using the following methods:
• Condoms (male or female) with or without a spermicide,
• Diaphragm or cervical cap with spermicide,
• Intrauterine device (IUD),
• Hormonal contraception, or
• Any other contraceptive method approved by the HVTN 123 Protocol Safety Review Team (PSRT)