Peg-Interferon Alpha 2b Combined With Two Intravenous Broadly HIV-1 Neutralizing Antibodies 3BNC117 and 10-1074 (BEAT-2)

The proposed study will evaluate the safety, tolerability and innate immune mechanisms
activation following administration of the combination of Pegylated Interferon alpha 2b
(peg-IFN-α2b) with two broadly neutralizing antibodies (3BNC117 and 10-1074) in the setting
of well controlled HIV infection with antiretroviral treatment and a monitored analytical
treatment interruption. This proposal builds on previous experience using interferon alpha,
3BNC117 and 10-1074 alone in separate clinical trials that included a closely monitored
analytical treatment interruption. The hypothesis is that the joint administration of
peg-IFN-α2b with 3BNC117 and 10-1074 will be more effective than either intervention
separately in suppressing HIV viremia during 8 weeks of analytical treatment interruption
(Step 4) and reducing integrated HIV DNA in blood and tissue when measured during an
analytical treatment interruption in participants with well-controlled HIV infection. A
review of the conceptual framework for the strategy to be tested includes:

- Why peg-IFN-α2? The therapeutic effects of peg-IFN-α2 yield two essential outcomes that
are the fundamental objectives of HIV curative strategies: control viral replication in
the absence of ART and reduce the levels of integrated HIV DNA in CD4+ T-cells. To date,
peg-IFN-α is the only intervention that has been shown to maintain viral suppression to
levels <50 copies/mL in the absence of ART in chronic infection. Preliminary data
supports that correlates of anti-HIV reductions are centered on activation of NK
responses.

- Why bNAbs + peg-IFN-α2b? The addition of bNAbs may act independently to control virus
replication or decrease fitness thereby increasing the potential for a larger antiviral
effect after IFN by enhance NK-mediated clearance via a reduced viral levels and the
complementarity of bNAbs in enhancing mechanisms of antibody-mediated cytotoxicity
against infected cells by binding to virus emerging from or viral proteins expressed on
activated latent cells.

- Why combined bNAbs? In vivo, multiple bNAbs targeting different epitopes provide better
neutralization and antigen recognition than single bNAbs, which suggests that adoptive
transfer of multiple bNAbs may lead to superior viral control. Although bNAbs may have
neutralization effects that are of greater clinical impact than ADCC, it is possible
that antigen targeting through multiple bNAbs may also enhance NK-mediated cytotoxicity
more than a single bNAb. The administration of broadly neutralizing antibodies alone in
the setting of an analytical treatment interruption delays the return of viremia in a
fraction of the participants.

- Why test an ATI of immunotherapy? To date, peg-IFN-α2 administered prior to an ATI or
ART and subsequently maintained throughout the ATI period has maintained viral
suppression. An effective curative strategy requires that all interventions be
discontinued.

Inclusion Criteria:

- HIV-1 infection, documented by any licensed rapid HIV test or HIV enzyme or
chemiluminescence immunoassay (E/CIA) test kit at any time prior to study entry and
confirmed by a licensed Western blot or a second antibody test by a method other than
the initial rapid HIV and/or E/CIA, or by HIV-1 antigen, plasma HIV-1 RNA VL

- Ability and willingness of participant to provide informed consent

- Men and women aged ≥18 years

- Clinically stable on their first or second ART regimen that includes a boosted
protease inhibitor or an integrase inhibitor. The current regimen should be stable for
4 weeks at the time of entry. Changes while the patient HIV viral load is undetectable
does not count toward the number of ART regimens used, (for example an individual
switching from an NNRTI-based regimen to an integrase inhibitor based regimen while
the HIV viral load is undetectable will still be in their first regimen)

- HIV-1 RNA that is <50 copies/mL using a FDA-approved assay performed by any laboratory
that has a CLIA certification or its equivalent within 56 days prior to study entry

NOTE: HIV-1 RNA must be measured at least once in the 24 weeks prior to entry and at least
3 days before the screening measure. Single determinations that are between ≥50 and <400
copies/mL (i.e., blips) are allowed as long as the preceding and subsequent determinations
are <50 copies/mL. The screening value may serve as the subsequent determination <50
copies/mL following a blip

- Screening CD4+ T-cell count ≥450 cells/μL within 45 days prior to study entry

- Willingness to have blood samples collected and used for study-related research
purposes

- The following laboratory values obtained within 45 days prior to enrollment:

- Absolute neutrophil count (ANC) ≥1000 cells/mm3

- Hemoglobin ≥12.0 g/dL for men and ≥11 g/dL for women

- Platelet count 100,000/mm3

- Creatinine clearance ≥60 mL/min estimated by the Cockcroft-Gault equation

- Alanine aminotransferase (ALT) ≤2.5 x ULN

- Pancreatic amylase ≤ 1.5 ULN and lipase ≤ 1.5 ULN and triglycerides ≤ 750 mg/dl

- total bilirubin ≤ 1.5x ULN, (if not receiving atazanavir) OR direct bilirubin ≤ 1
mg/dl (if receiving atazanavir)

- For females of reproductive potential (i.e., women who have not been post-menopausal
for at least 24 consecutive months, who have had menses within the preceding 24
months, or women who have not undergone surgical sterilization, specifically
hysterectomy and/or bilateral oophorectomy or bilateral salpingectomy), negative urine
pregnancy test (with a sensitivity of 15-25 mIU/mL) within 48 hours prior to screening
and entry.

ADDITIONAL REQUIREMENTS BIOLOGICAL FEMALES ARE NOTED IN CLINICAL PROTOCOL.

-Female partners of reproductive potential of male study participants on study drug would
be educated that:

At least two of the following contraceptives MUST be used appropriately by female partners
of reproductive potential of male study participants and/or their male partners with one
method being highly effective and the other method being either highly effective or less
effective as listed below:

Highly Effective Methods of Contraception

- Male condoms with spermicide

- Hormone-based contraceptives including combined oral contraceptive pills, vaginal
ring, injectables, implants, and intrauterine devices (IUDs) such as Mirena by male
participant's female partner of reproductive potential.

- Nonhormonal IUDs, such as ParaGard

- Tubal ligation

- Complete Abstinence*

- *Complete abstinence as defined as complete avoidance of heterosexual intercourse.
Participants who choose complete abstinence are not required to use a second method of
contraception. Acceptable alternate methods of highly effective contraception must be
discussed in the event that the participant chooses to forego complete abstinence.

NOTE: Female partners of male participants participating in the study may use hormone based
contraceptives as one of the acceptable methods of contraception since they will not be
receiving study drug.

- Negative HBsAg result obtained within 6 months prior to study entry.

- HCV antibody negative result within 6 months prior to entry, or if the HCV antibody
result is positive, a negative HCV RNA obtained within 6 months prior to study entry.
Treated and cured HCV infected participants are allowed.

- Adequate venous access in at least one arm

- Body weight ≥ 125 and ≤ 300 lbs

- A non-clinically significant electrocardiogram (EKG, see section 7.2) for:

1. men >45 years or women > 55 years of age

2. younger subjects of either sex with two risk factors for coronary artery disease
[smoking, hypertension (BP >140/90 or on antihypertensive medications), low HDL
(<40 mg/dl), family history of premature CHD (<55 yrs males/<65 females

3. subjects with a Framingham score > 15% (men) or 10% (women)

Exclusion Criteria:

- Previous receipt of humanized or human monoclonal antibody whether licensed or
investigational

- Weight >300 lbs or <125 lbs

- History of an AIDS-defining illness

- Ongoing AIDS-related opportunistic infection (including oral thrush)

- History of a severe allergic reaction with generalized urticaria, angioedema, or
anaphylaxis in the 2 years prior to enrollment

- Currently pregnant, breastfeeding, or planning pregnancy

- Receipt of other investigational study agent within 30 days prior to enrollment

- Current or prior medications:

- Confirmed clinical history of developing resistance to ART regimens that resulted
in treatment changes

- Receiving didanosine as part of the participant's ART regimen at the time of
screening

- Ongoing treatment with Isoniazid, Pyrazinamide, Rifabutin, Rifampicin,
Ganciclovir, Valgancyclovir, Oxymetholone, Thalidomide or Theophylline.

- Ongoing treatment with anticoagulants

- Use of any investigational drug within 30 days prior to screening

- History or current use of immunomodulatory therapy for over 2 weeks during the 6
months prior to enrollment, including, but not limited to:

- IFN-α or γ (recombinant or pegylated)

- Systemic corticosteroids (inhaled steroids allowed at the discretion of the
Investigator)

- Systemic cancer chemotherapy/irradiation

- cyclosporin; tacrolimus (FK-506)

- OKT-3

- Any Interleukin, including IL-2

- Cyclophosphamide

- Methotrexate

- IVIG (gamma globulin)

- G/M-CSF

- Hydroxyurea

- Thalidomide

- Pentoxifylline

- Thymopentin, thymosin

- Dithiocarbonate

- Polyribonucleoside.

- History of adverse or allergic reactions to any type-1 interferon (e.g. IFN-α2a,
IFN-α2b, IFN-β)

- Any other chronic or clinically significant medical condition that in the opinion of
investigator would jeopardize the safety or rights of the volunteer, including,
clinically significant forms of:

- Drug or alcohol abuse

- Severe asthma

- Uncontrolled hypertension

- Type I diabetes mellitus, or type II diabetes mellitus that is not controlled
with oral agents and/or insulin (i.e.: subjects with a history of diabetes
mellitus and HA1C of > 9 in the last 3 months or at screening)

- Psychiatric disorders, including severe depression and/or suicidal ideation

- Heart disease

- Cancer or hematologic malignancies

- Prior diagnosis of multiple sclerosis or other neurodegenerative disorders

- Liver cirrhosis or hepatic decompensation

- Chronic HCV infection (HCV viremia), or HBV Ag positive and/ or HBV viremia
(Notice: subjects with prior HCV infection with a documented sustained virologic
response at 24 weeks post treatment prior to screening are eligible for
enrollment.

- Major organ transplantation with an existing functional graft

- Active autoimmune diseases, including autoimmune hepatitis

- History of retinopathy or clinically significant ophthalmologic disease

- Opportunistic infections or other active infectious diseases

- Other conditions, such as active drug/alcohol abuse or dependence, that in the opinion
of the Investigator would interfere with study compliance.

- Initiation of treatment during acute infection