Safety and Feasibility of TA-CIN Vaccine in HPV16 Associated Cervical Cancer

This is a randomized, multi-center, open label pilot study. The primary goal of this study is
to determine the safety of TA-CIN vaccine as adjuvant therapy, and to assess evidence of
induction of HPV antigen-specific immunologic response when administered at different
locations (arm or thigh). In this pilot study, a single dose level (100µg) assessment of the
safety and tolerability of administering TA-CIN vaccine three times to either the arm versus
the thigh of patients who have previously been treated for HPV16-related cervical cancer in
the past year and are documented to have no evidence of disease recurrence based on
standard-of-care imaging and/or clinical assessment upon eligibility.

A total of 14 patients will be enrolled to assess the safety of TA-CIN vaccine via different
injection sites as adjuvant therapy. Safety assessments will continue for a period for 1
month after the last vaccination. Few or no serious adverse events (SAEs) are expected from
this regimen and routes of administration. The motivation for the design is to confirm that
the dose and site of injection implemented here has minimal or no systemic toxicity, as well
as determining the preferred injection site that can elicit more potent immune response.

The study will consist of the following parts:

- Screening evaluation

- Dosing period and response assessments

- Follow-up visits after last dose

Screening Evaluation The screening visit will be performed within 21 days of the first study
drug administration visit. The study team will check the results of these screening tests to
see if patient qualifies to participate.

Dosing Period Those who meet the study requirements during the screening period will then
begin the dosing phase of this study. TA-CIN will be given as a single intramuscular
injection every 4 weeks for a maximum of 3 times. The location of the injection (arm or
thigh) will depend on randomization. Patients will be assessed for safety and response to
treatment during this period.

Follow-Up Period Four follow-up evaluations will be performed during a clinic visit after the
last dose of the vaccine. These will take place at the following time points: (1) 1-3 weeks
after the last dose of the study drug, (2) about 6 months after the last dose of the study
drug, (3) about 12 months after the last dose of the study drug, and (4) about 24 months
after the last dose of the study drug.

Inclusion Criteria:

1. Patients with HPV16 related stage IB1-IV cervical cancer who completed definitive
treatment within 12 months

2. Patients with no evidence of disease recurrence within 8 weeks of enrollment

3. Documented to have HPV16 nucleic acid within the cervical tumor specimen as determined
by in situ hybridization

4. Fresh-frozen or paraffin-embedded material must be available for in situ hybridization
testing for HPV16 nucleic acid for central confirmation

5. Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 to 1

6. Adequate organ function as defined by study-specified laboratory tests

7. Ability to understand and willingness to sign a written informed consent document

8. Willing and able to comply with study schedule and other protocol requirements

Exclusion Criteria:

1. Currently have or have history of certain study-specified heart, liver, kidney, lung,
neurological, immune or other medical conditions

2. Patients with a diagnosis of immunosuppression or prolonged, active use of
immunosuppressive agents such as systemic steroids

3. Prior HPV vaccination

4. Had surgery, chemotherapy, or radiation therapy within 28 days prior to receiving
study drug

5. Another investigational product within 28 days prior to receiving study drug

6. Active or chronic HIV, HBV, or HCV infection

7. Pregnant or lactating

8. Patients who have an active autoimmune disease

9. Patients with a recognized immunodeficiency disease or are being chronically treated
with immunosuppressive drugs

10. Women of childbearing potential

11. Patients with non-healed wounds

12. A history of current or recent concurrent malignancy (≤5 years) except basal cell
cancer.

13. Inability to understand or unwillingness to sign an informed consent document