A Phase I/II Study of MEDI4736 in Combination With Olaparib in Patients With Advanced Solid Tumors.

This is a phase I/II open-label, multicenter study to evaluate the safety, tolerability,
pharmacokinetics (PK) and antitumor activity of MEDI4736 in combination with olaparib in
patients with advanced solid tumors, selected based on a rationale for response to olaparib.

Patients will be poly (adenosine diphosphate-ribose) polymerase (PARP)-inhibitor and
immunotherapy (IMT)-naïve (defined as no prior exposure to PARP inhibitors or IMT, including,
but not limited to, other anti-cytotoxic T-lymphocyte-associated protein 4 [CTLA-4],
anti-programmed cell death 1 [PD-1], anti-programmed death-ligand 1 [PD-L1] monoclonal
antibodies, or any other antibody or drug specifically targeting T-cell co-stimulation or
checkpoint pathways).

The 4 initial stage cohorts (Modules 1 to 4) include patients with relapsed small cell lung
cancer (SCLC), germline BRCA mutated (gBRCAm) metastatic human epidermal growth factor
receptor 2 (HER2)-negative breast cancer, gBRCAm platinum-sensitive relapsed ovarian cancer,
and gastric cancer. Enrollment for these cohorts has been completed.

Second stage cohorts (Modules 5 to 7) will include patients with relapsed BRCAm
platinum-sensitive relapsed ovarian cancer and non BRCAm platinum-sensitive relapsed ovarian
cancer.

Third stage cohorts (Modules 8 to 10) will include patients with HER2-negative, BRCAm breast
cancer (Module 8), HER2 negative, non BRCAm, Homologous Recombination Repair gene mutated
(HRRm) breast cancer (Module 9) and non BRCAm, non HRRm triple negative breast cancer (TNBC)
breast cancer (Module 10).

Inclusion criteria:

- Patients must have histologically or cytologically confirmed progressive advanced or
metastatic solid tumor of one of the following:

- Platinum sensitive relapsed small cell lung cancer (module 1)

- gBRCAm HER2-negative metastatic breast cancer (module 2)

- gBRCAm ovarian cancer (modules 3 and 5)

- Metastatic or relapsed Gastric cancer (adenocarcinoma) (module 4)

- gBRCAm negative ovarian cancer (modules 6 and 7)

- BRCAm (including germline and tumor BRCA1/2 mutations) human epidermal growth
factor receptor 2 (HER2)-negative breast cancer patients with metastatic or
locally advanced disease, which is unresectable (or the patient is not a
candidate for resection) (Module 8 BRCAm)

- Human epidermal growth factor receptor 2 (HER2)-negative breast cancer patients
with metastatic or locally advanced disease, which is unresectable (or the
patient is not a candidate for resection) Patients must have documented evidence
from Myriad central tumor testing that they do not have a mutation in BRCA1 or
BRCA2 that is predicted to be deleterious or suspected deleterious (known or
predicted to be detrimental/lead to loss of function) and do have a deleterious
or suspected deleterious mutation in at least 1 of the following 13 HRR genes:
ATM, BARD1, BRIP1, CDK12, CHEK1, CHEK2, FANCL, PALB2, PPP2R2A, RAD51B, RAD51C,
RAD51D, RAD54L. (Module 9 HRRm).

- Breast cancer patients with metastatic or locally advanced disease, which is
unresectable (or the patient is not a candidate for resection). Patients must
have documented evidence from Myriad central tumor testing that they do not have
any mutation in BRCA1, BRCA2, ATM, BARD1, BRIP1, CDK12, CHEK1, CHEK2, FANCL,
PALB2, PPP2R2A, RAD51B, RAD51C, RAD51D, RAD54L that is predicted to be
deleterious or suspected deleterious (known or predicted to be detrimental/lead
to loss of function) (Module 10 TNBC).

- At least one measurable lesion that can be accurately assessed at baseline by computed
tomography (CT) (or magnetic resonance imaging [MRI] suitable for assessment as per
RECIST 1.1. The baseline scan must be obtained within 28 days prior to the first dose
of olaparib.

- Male or female patients, age ≥18 years (≥19 years for South Korea)

- Eastern Cooperative Oncology Group (ECOG) performance status 0-1

- Life expectancy ≥12 weeks

- Adequate organ and marrow function

- Ability to swallow oral medications (capsules and tablets) without chewing, breaking,
crushing, opening or otherwise altering the product formulation. Patients should not
have gastrointestinal illnesses that would preclude the absorption of olaparib, which
is an oral agent. For the gastric cancer cohort, patients with a full or partial
gastrectomy will be permitted.

- Ability of patient to understand and the willingness to sign a written informed
consent document prior to any protocol related procedures, including screening
evaluations.

- Female patients must either:

- Be of non-reproductive potential OR

- Have a negative serum pregnancy test within 28 days of study treatment and
confirmed prior to treatment on Day 1, and agree to use contraception if they or
their partner are of reproductive potential

Exclusion criteria

- Prior chemotherapy or other systemic anticancer therapy within 4 weeks prior to start
of olaparib treatment, 6 weeks for nitrosoureas or mitomycin. Exceptions include:
Anti-hormonal treatment for ER positive or PR positive breast cancer is allowed until
7 days prior to treatment with olaparib, exposure to an investigational agent within
30 days or 5 half-lives (whichever is the longer) prior to start of olaparib treatment
is not allowed, prior receipt of biologics targeting T cell co-regulatory proteins
and/or immune checkpoints is not allowed. Examples include MEDI4736 or other PD1 or
PD-L1 or PD-L2 inhibitors or anti-CTLA4 therapy, previous treatment with a PARP
inhibitor, is not allowed.

- Radiation therapy within 4 weeks prior to start of olaparib treatment (includes
radiation targeting bone metastases) or radionuclide treatment within 6 weeks of
treatment start.

- Current dependency on total parenteral nutrition or IV fluid hydration.

- Concomitant use of known strong cytochrome P450 (CYP) 3A (CYP3A) inhibitors or
moderate CYP3A inhibitors. Concomitant use of known strong or moderate CYP3A inducers.

- Concomitant therapy with any other anticancer therapy or chronic use of systemic
corticosteroids.

- Previous allogenic bone marrow transplant or double umbilical cord blood
transplantation

- Whole blood transfusions in the last 120 days

- Patients with symptomatic or uncontrolled brain metastases.

- Patients being considered at poor medical risk due to a serious, uncontrolled medical
disorder or non-malignant systemic disease.

- Any psychiatric disorder that prohibits obtaining informed consent

- Major surgery or significant traumatic injury within 2 weeks of run-in

- Immunocompromised patients

- QTc prolongation >470 msec or other significant ECG abnormality noted within 14 days
of treatment

- Pregnant and breastfeeding women are excluded.

- Involvement in the planning and/or conduct of the study (applies to both AstraZeneca
staff and/or staff at the study site)

- Previous enrolment in the present study

- Participation in a clinical study within 28 days or 5 half-lives of the drug,
whichever is longer.