GRN-1201 With Pembrolizumab in Subjects With Metastatic PD-L1+ NSCLC

Age Range:18 - Any
Start Date:January 3, 2019
End Date:March 2021
Contact:Laurie Rosenstein

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A Pilot, Open-Label, Multi-Center, Multi-Dose Study of GRN-1201 Added to Pembrolizumab in Subjects With Non-Small Cell Lung Cancer With High PD-L1 Expression

This is a non-randomized, Phase 2, 2-stage, open-label, multi-center study of
GRN-1201/sargramostim + pembrolizumab in subjects with PD-L1+ metastatic NSCLC. All subjects
will have newly diagnosed metastatic PD-L1+ (TPS ≥ 50%) NSCLC with no epidermal growth factor
receptor (EGFR) or anaplastic lymphoma kinase (ALK) genomic tumor aberrations. Subjects with
EGFR or ALK genomic tumor aberrations with progression on FDA-approved therapy for these
aberrations are eligible

This is a non-randomized, Phase 2, 2-stage, open-label, multi-center study of
GRN-1201/sargramostim + pembrolizumab in subjects with metastatic PD-L1+ NSCLC.

All subjects will have newly diagnosed metastatic PD-L1+ (TPS ≥ 50%) NSCLC with no epidermal
growth factor receptor (EGFR) or anaplastic lymphoma kinase (ALK) genomic tumor aberrations.

The study will follow a Simon two-stage design with up to 64 total subjects enrolled. All
subjects will receive GRN-1201 at 3.0 mg in combination with 75 µg sargramostim and 200 mg

GRN-1201 is to be administered once weekly for 4 weeks followed by every 3-week dosing for an
additional 12 doses (16 total doses of GRN-1201). Each dose of GRN-1201 will be given as 1 mL
divided into 4 separate 0.25 mL intradermal injections on each day of treatment.
Pembrolizumab is to be given every 3 weeks for up to a total of 35 doses.

This study will consist of a screening period of up to 28 days; a treatment period consisting
of GRN-1201/sargramostim administered weekly for 4 weeks (4 doses) followed by administration
every 3 weeks for 12 additional doses . Pembrolizumab is to be given every 3 weeks for up to
a total of 35 doses.

A follow up visit will occur approximately 4 weeks after the last administration of treatment
for the study. In addition, all subjects will be followed for evaluation of disease
progression and survival

Inclusion Criteria:

1. Be male or female at least 18 years of age (at the time consent is obtained);

2. Be able and willing to provide written informed consent and to comply with all
requirements of study participation (including all study procedures);

3. Have histologically- or cytologically-confirmed diagnosis of Stage IV NSCLC Have newly
diagnosed, metastatic NSCLC with PD-L1 TPS ≥ 50% (as determined by central lab using
the 22C3 pharmDx kit) Note: Subjects with documentation of PD-L1 TPS ≥50% by IHC
analysis using the 22C3 pharmDx kit will not require repeat PD-L1 testing by central
laboratory and

4. Have no prior systemic chemotherapy for metastatic disease: at least 6 months since
prior adjuvant chemotherapy

5. Be HLA-A*02+ as determined by Central Laboratory;

6. Be able to provide formalin fixed, paraffin-embedded (FFPE) tumor tissue obtained from
either a core or excisional tumor biopsy;

7. Have a life expectancy of at least 3 months;

8. Have an Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1;

9. Have measurable disease based on Response Evaluation Criteria in Solid Tumors (RECIST)
1.1 as determined by the site study team. Target tumor lesions situated in a
previously irradiated area are considered measurable if progression has been
demonstrated in such lesions;

10. Has adequate organ function as defined by:

- Absolute neutrophil count ≥ 1,500/µL

- Platelets ≥ 100,000/µL

- Hemoglobin ≥ 9 g/dL (without transfusion for at least one month)

- Serum creatinine ≤ 1.5 x Upper Limit of Normal (ULN) OR

o glomerular filtration rate (GFR) ≥30mL/min if serum creatinine > 1.5 x ULN,
creatinine clearance may be calculated using the institutional/laboratory
standard method

- Serum total bilirubin ≤ 1.5 x ULN OR

o Direct bilirubin ≤ ULN for subjects with total bilirubin >1.5 x ULN

- Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) ≤ 2.5 x ULN
(≤ 5 x ULN for subjects with liver metastases)

- Albumin ≥2.5mg/dL

- International Normalized Ratio (INR) or PT/aPTT <1.5 x ULN. For subjects
receiving anticoagulation therapy, PT/aPTT and INR should not be greater than the
recommended range for the intended use of the anticoagulant

11. Have recovered from the effects of any prior radiotherapy or surgery;

12. Female subjects of childbearing potential must have a negative serum human chorionic
gonadotropic (hCG) test within 1 week of Day 1 (pregnancy test not required for
subjects with bilateral oophorectomy and/or hysterectomy or for those subjects who are
>1 year post-menopausal); and

13. All female and male subjects of reproductive potential must agree to use an effective
method of contraception, as determined by the Investigator, during and for 4 months
after the last dose of study treatment.

Exclusion Criteria:

1. Is currently participating in or has participated in a study of an investigational
agent or using an investigational device within 14 days of the first dose of

2. Has a diagnosis of immunodeficiency or is receiving systemic steroid therapy > 10 mg
prednisone or equivalent per day or any other form of immunosuppressive therapy within
7 days prior to the first dose of study treatment;

3. Has undergone major surgery within 3 weeks of Study Day 1, Subject must have recovered
adequately from any toxicity and/or complications from the intervention prior to
starting therapy;

4. Has a known additional malignancy that is progressing or requires systemic treatment.
Exceptions include basal cell carcinoma of the skin, squamous cell carcinoma of the
skin that has undergone potentially curative therapy or in situ cervical cancer.

5. Has received transfusion of blood products (including platelets or red blood cells) or
administration of colony stimulating factors (including granulocyte colony-stimulating
factor [G-CSF], GM-CSF or recombinant erythropoietin) within 4 weeks prior to study
Day 1;

6. Has known active central nervous system (CNS) metastases NOTE: Subjects with
previously treated brain metastases may participate provided they are stable (without
evidence of progression by imaging [using the identical imaging modality for each
assessment, either magnetic resonance imaging (MRI) or computerized tomography (CT)
scan] for at least four weeks prior to the first dose of study treatment and any
neurologic symptoms have returned to baseline), have no evidence of new or enlarging
brain metastases, and are not using steroids for at least 7 days prior to study

7. Has carcinomatous meningitis;

8. Has an active autoimmune disease that has required systemic treatment in the past 2
years (i.e. with use of disease modifying agents, corticosteroids or immunosuppressive
drugs). Replacement therapy (e.g., thyroxine, insulin or physiologic corticosteroid
replacement therapy for adrenal or pituitary insufficiency, etc.) is not considered a
form of systemic treatment NOTE: Subjects with vitiligo or resolved childhood
asthma/atopy would be an exception to this rule. Subjects that require intermittent
use of bronchodilators or local steroid injections would not be excluded from the

9. Has history of interstitial lung disease, or history of (non-infectious) pneumonitis
that required steroids, or current pneumonitis;

10. Has an active infection requiring systemic therapy NOTE: Antibiotic therapy must have
been completed a minimum of 3 days prior to start of study treatment;

11. Has known active Hepatitis B (e.g., HBsAg reactive) or Hepatitis C (e.g., HCV RNA
[qualitative] is detected);

12. History of myocardial infarction, unstable angina, cardiac or other vascular stenting,
angioplasty, or surgery within 6 months prior to day 1 of study treatment;

13. Has a history or current evidence of any condition, therapy, or laboratory abnormality
that might confound the results of the study, interfere with the subject's
participation for the full duration of the study, or is not in the best interest of
this subject to participate, in the opinion of the treating investigator;

14. Has known psychiatric or substance abuse disorders that would interfere with
cooperation with the requirements of the study;

15. Has received a live virus vaccine within 30 days of the planned first dose of study
therapy NOTE: seasonal influenza vaccines for injection which are generally
inactivated flu vaccines are permitted; however, intranasal influenza vaccines (e.g.,
Flu-Mist®) are live attenuated vaccines and are not permitted;

16. Is pregnant, breastfeeding, or expecting to conceive or father a child within the
projected duration of the study including 120 days following the last dose of study
treatment; or

17. Has any concurrent medical condition that, in the opinion of the Investigator, would
complicate or compromise compliance with the study or the well-being of the subject.

18. Have an EGFR or ALK genomic tumor aberrations for which targeted therapy with an EGFR
or ALK inhibitor is indicated.

Additional Exclusion Criteria for Cohort 2:

19. Has had prior treatment with an anti-PD-1 or anti-PD-L1 antibody, anti-cytotoxic
T-lymphocyte-associated antigen-4 (CTLA-4) antibody (including ipilimumab) or any
other antibody or drug specifically targeting T-cell co-stimulation or checkpoint
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