CT Antigen TCR-Engineered T Cells for Myeloma

The primary objective of the study is to evaluate the safety and tolerability of autologous
genetically modified T cells transduced to express the high affinity NY-ESO-1c259 TCR in
HLA-A201 patients. Eligibility screening will be performed in two steps. First, patients will
undergo prescreening to determine if they have the correct HLA type in order to respond to
the engineered T cell therapy, and to test for presence of the target antigen, NY-ESO-1 and
LAGE-1, in their tumor cells. Patients, who are HLA-A201 positive and test positive for
expression of NY-ESO-1 and/or LAGE-1 in their myeloma tumor will move on to complete all
screening procedures to determine eligibility for the study.

Patients will initially undergo a steady-state mononuclear cell apheresis for T cell
collection. About 3-4 weeks later (to allow expansion/engineering/releasing the engineered T
cells), patients will receive a short course of cytoreductive chemotherapy prior to receiving
the engineered T cell infusion, comprised of 1.5 gm/m2 of cyclophosphamide, mesna will be
given if in accordance with institutional standards.

At day 0, patients will receive a dose of ≥0.1-1 x 1010 anti-CD3/anti-CD28-costimulated
autologous T cells which have been genetically modified to express affinity-enhanced NY-ESO-1
T cell receptors (TCRs). A minimum dose of 0.1≤x<1 x 109 will be permitted. Patients
receiving this low dose level will be evaluated separately for safety and efficacy.

Patients will undergo myeloma restaging approximately 1 week prior to the T cell infusion,
and post infusion at days +28, +42 (week 6), +100 and 6 months post infusion and then every 3
months until relapse/progression or until 1 year, whenever comes first. At this point,
patients will be followed semi-annually for up to 5 years and then annually for long term
follow-up for monitoring for delayed adverse events until 15 years after receiving the
genetically modified T cells, in accordance with FDA Guidelines.

Inclusion Criteria:

- 1. Written informed consent must be obtained from all patients before entry into the
study

2. Patients must have a diagnosis of myeloma (see Appendix A for diagnostic criteria).

3. Patients must have progressive or active disease following prior therapy for their
myeloma which:

1. includes an IMiD and proteasome inhibitor as separate lines or a combined line of
therapy

2. May include prior auto-SCT but not prior allo-SCT

Patients who have failed second or third line therapy and beyond, such as DPACE,
and who are experiencing a partial response rather than progressive disease are
also eligible.

4. Patients must have measurable disease on study entry. Measurable disease may
include quantifiable or detectable levels of serum or urine paraprotein. For
patients with minimally secretory disease on study entry, serum free kappa or
lambda light chain levels, or the serum free light chain ratio may be measured
and used for disease monitoring if abnormal.

5. Patients must be HLA-A201 as determined by a CLIA certified (or equivalent)
clinical laboratory. (This determination will be made under a pre-enrollment
screening ICF)

6. Patients must have confirmed expression of NY-ESO-1 and/or LAGE-1 by RT-PCR,
immunohistochemistry or quantigene analysis. (This determination will be made
under a pre-enrollment screening ICF)

Exclusion Criteria:

- 1. Pregnant or nursing females 2. HIV or HTLV-1/2 seropositivity 3. Known history of
myelodysplasia 4. Known history of chronic active hepatitis or liver cirrhosis (if
suspected by laboratory studies, should be confirmed by liver biopsy).

5. Active Infection with HBV or HCV

- Active hepatitis B infection as determined by test for hepatitis B surface
antigen.

- Active hepatitis C. Patients will be screened for HCV antibody. If the HCV
antibody is positive, a screening HCV RNA by any RT PCR or bDNA assay must be
performed at screening by a local laboratory with a CLIA certification or its
equivalent. Eligibility will be determined based on a negative screening value.
The test is not required if documentation of a negative result of a HCV RNA test
performed within 60 days prior to screening is provided.

6. Prior allogeneic transplant 7. History of severe autoimmune disease requiring
steroids or other immunosuppressive treatments.

8. Active immune-mediated diseases including: connective tissue diseases,
uveitis, sarcoidosis, inflammatory bowel disease, multiple sclerosis.

9. Evidence or history of other significant cardiac, hepatic, renal,
ophthalmologic, psychiatric, or gastrointestinal disease which would likely
increase the risks of participating in the study. The specific type of stress
test will be selected at the PI's discretion.

10. Active bacterial or systemic viral or fungal infections.