A Feasibility Study of Durvalumab +/- Oleclumab as Neoadjuvant Therapy for Muscle-invasive Bladder Cancer (BLASST-2)

This research study is a Feasibility Study, which is the first time investigators are
examining these drugs, Durvalumab (MEDI4736) and Oleclumab (MEDI9447) in patients with
muscle-invasive bladder cancer (MIBC) cancer prior to surgery. Cisplatin-containing
chemotherapy given before surgery is the standard of care in patients with MIBC because it
increases the rate of cure after surgery. Participants may still be eligible for this study
if their doctor determines that participants are able to receive cisplatin-containing
chemotherapy, but the participants elect not to undergo chemotherapy before surgery,
understanding the potential benefits of chemotherapy. The FDA (the U.S. Food and Drug
Administration) has not approved Durvalumab (MEDI4736) for localized bladder cancer prior to
surgery, but it has been approved for other uses, including for locally advanced or
metastatic bladder cancer after progression on platinum-containing chemotherapy. The FDA (the
U.S. Food and Drug Administration) has not approved Oleclumab (MEDI9447) as a treatment for
any disease. Durvalumab is a monoclonal antibody (an antibody is a protein produced by the
body's immune system) that works by blocking the Programmed Cell Death Ligand 1 (PD-L1), a
protein on cancer cells that stops the body's immune system from killing cancer cells, to
increase the body's immune response to prevent or slow down cancer growth. Oleclumab is a
monoclonal antibody that works by reducing the amount of adenosine, a small molecule called a
metabolite that binds to adenosine receptors on immune cells to regulate the immune system
and suppress the immune response. Reducing the amount of immunosuppressive adenosine can
increase the body's immune response to kill cancer cells. It is hoped that by combining
Oleclumab with Durvalumab, an even greater immune response against the tumor will be
generated. This research study is designed to see if the new anti-cancer drug Durvalumab
(MEDI4736) with or without another new anti-cancer drug Oleclumab (MEDI9447) can be safely
administered before surgery for bladder cancer

Inclusion Criteria:

- For inclusion in the study patients must fulfil all of the following criteria: Written
informed consent and any locally-required authorization (e.g. HIPAA) obtained from the
patient prior to performing any protocol-related procedures, including screening
evaluations

- Age > 18 years at time of study entry

- Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1 (See Appendix
A).

- Histologically confirmed bladder transitional cell carcinoma (TCC)

---Patients with mixed histology are required to have a component of TCC, and no
component of small cell histology

- T2-T4a N0 M0 disease, considered appropriate and planned for radical cystectomy

- Ineligible for cisplatin-based chemotherapy, defined by any of the following:

- Creatinine clearance (CL) <60 mL/min. GFR should be calculated from serum/plasma
creatinine using the Cockcroft-gault formula.

- CTCAE v5.0 Grade > 1 hearing loss

- CTCAE v5.0 Grade > 1 neuropathy

- NYHA Class > II cardiac dysfunction

- Patients not meeting the above criteria are eligible if she/he declines perioperative
cisplatin-based chemotherapy after specific informed consent describing the known
benefits of cisplatin-based chemotherapy.

- Adequate organ function laboratory values as defined below:

- Hemoglobin ≥ 9.0 g/dL

- Absolute neutrophil count (ANC) 1.5 x (> 1500 per mm3)

- Platelet count ≥100 x 109/L (>75,000 per mm3)

- Albumin > 2.5 g/dL

- International Normalized Ratio (INR) or activated partial thromboplastin time
(aPTT) < 1.5 x ULN, unless the patient is receiving anticoagulation therapy
provided INR or PTT is within the therapeutic range of the intended anticoagulant
therapy.

- Serum bilirubin ≤1.5 x institutional upper limit of normal (ULN)

---This will not apply to patients with confirmed Gilbert's syndrome (persistent
or recurrent hyperbilirubinemia that is predominantly unconjugated in the absence
of hemolysis or hepatic pathology), who will be allowed only in consultation with
their physician.

- AST (SGOT)/ALT (SGPT) ≤2.5 x institutional upper limit of normal

- Measured creatinine CL >30 mL/min or Calculated creatinine CL>30 mL/min by the
Cockcroft-Gault formula (Cockcroft and Gault 1976) or by 24-hour urine collection
for determination of creatinine clearance:

- Males:

- Creatinine CL (mL/min) = Weight (kg) x (140 - Age) 72 x serum creatinine
(mg/dL)

- Females:

- Creatinine CL (mL/min) = Weight (kg) x (140 - Age) x 0.85 72 x serum
creatinine (mg/dL)

- Evidence of post-menopausal status or negative urinary or serum pregnancy test for
female pre-menopausal patients. Women will be considered post-menopausal if they have
been amenorrheic for 12 months without an alternative medical cause. The following
age-specific requirements apply:

- Women <50 years of age would be considered post-menopausal if they have been
amenorrheic for 12 months or more following cessation of exogenous hormonal
treatments and if they have luteinizing hormone and follicle-stimulating hormone
levels in the postmenopausal range for the institution or underwent surgical
sterilization (bilateral oophorectomy or hysterectomy).

- Women ≥50 years of age would be considered post-menopausal if they have been
amenorrheic for 12 months or more following cessation of all exogenous hormonal
treatments, had radiationinduced menopause with last menses >1 year ago, had
chemotherapy-induced menopause with last menses >1 year ago, or underwent
surgical sterilization (bilateral oophorectomy, bilateral salpingectomy or
hysterectomy).

- Patient is willing and able to comply with the protocol for the duration of the study
including undergoing treatment and scheduled visits and examinations including follow
up.

- Availability of baseline archival tumor tissue obtained for correlative studies dated
within 8 weeks of study registration.

- Either FFPE tumor tissue block or a minimum of fifteen 5μm unstained FFPE slides
and fifteen 10μm unstained FFPE slides with an associated pathology report is
required.

- Patients without adequate baseline tumor tissue or have archival tumor tissue >8
weeks from registration must undergo cystoscopic tumor biopsy, meeting the above
tissue criteria.

Exclusion Criteria:

- Patients with primary TCC of the ureter, urethra, or renal pelvis without TCC of the
bladder

- Inoperable tumor(s) with fixation to the pelvic wall on clinical exam

- Any previous systemic chemotherapy or radiotherapy for TCC of bladder

- Participation in another clinical study with an investigational product during the
last 6 months

- Concurrent enrolment in another clinical study, unless it is an observational
(non-interventional) clinical study or during the follow-up period of an
interventional study

- Any previous treatment with a PD1 or PD-L1 inhibitor, including durvalumab

- History of another primary malignancy except for:

- Malignancy treated with curative intent and with no known active disease ≥5 years
before the first dose of study drug and of low potential risk for recurrence

- Adequately treated non-melanoma skin cancer or lentigo maligna without evidence
of disease

- Adequately treated carcinoma in situ without evidence of disease (e.g. cervical
cancer in situ)

- Receipt of the last dose of intravesical chemotherapy or biologic therapy

≤ 42 days (6 weeks) prior to the first dose of study drug for patients who have
received prior intravesical chemotherapy or biologic therapy (e.g. BCG)

- Mean QT interval corrected for heart rate using Fridericia's formula (QTcF)

≥470 ms calculated from 3 ECGs (within 15 minutes at 5 minutes apart) for durvalumab +
oleclumab cohorts only. Patient safety and the cardiac EKG should be consulted as
needed.

- Any unresolved toxicity NCI CTCAE version 5.0 Grade ≥2 from previous anticancer
therapy with the exception of alopecia, vitiligo, and the laboratory values defined in
the inclusion criteria

- Patients with Grade ≥2 neuropathy will be evaluated on a case-bycase basis after
consultation with the Study Physician.

- Patients with irreversible toxicity not reasonably expected to be exacerbated by
treatment with durvalumab and/or oleclumab may be included only after
consultation with the Study Physician.

- Any concurrent chemotherapy, IP, biologic, or hormonal therapy for cancer treatment.
Concurrent use of hormonal therapy for non-cancer-related conditions (e.g. hormone
replacement therapy) is acceptable.

- Major surgical procedure (as defined by the Investigator) within 28 days prior to the
first dose of IP. Note: Local surgery of isolated lesions for palliative intent is
acceptable.

- History of allogenic organ transplantation

- Active or prior documented autoimmune or inflammatory disorders (including
inflammatory bowel disease [e.g. colitis or Crohn's disease], diverticulitis [with the
exception of diverticulosis], systemic lupus erythematosus, Sarcoidosis syndrome, or
Wegener syndrome [granulomatosis with polyangiitis, Graves' disease, rheumatoid
arthritis, hypophysitis, uveitis, etc]). The following are exceptions to this
criterion:

- Patients with vitiligo or alopecia

- Patients with hypothyroidism (e.g. following Hashimoto syndrome) stable on
hormone replacement

- Any chronic skin condition that does not require systemic therapy

- Patients without active disease in the last 5 years may be included but only
after consultation with the study physician

- Patients with celiac disease controlled by diet alone

- Uncontrolled intercurrent illness, including but not limited to, ongoing or active
infection, symptomatic congestive heart failure, uncontrolled hypertension, unstable
angina pectoris, cardiac arrhythmia, interstitial lung disease, serious chronic
gastrointestinal conditions associated with diarrhea, or psychiatric illness/social
situations that would limit compliance with study requirement, substantially increase
risk of incurring AEs or compromise the ability of the patient to give written
informed consent

- History of leptomeningeal carcinomatosis

- Brain metastases or spinal cord compression. Patients with suspected brain metastases
at screening should have an MRI (preferred) or CT each preferably with IV contrast of
the brain prior to study entry.

- History of active primary immunodeficiency

- Active infection including tuberculosis (clinical evaluation that includes clinical
history, physical examination and radiographic findings, and TB testing in line with
local practice), hepatitis B (known positive HBV surface antigen (HBsAg) result),
hepatitis C, or human immunodeficiency virus (positive HIV 1/2 antibodies). Patients
with a past or resolved HBV infection (defined as the presence of hepatitis B core
antibody [anti-HBc] and absence of HBsAg) are eligible. Patients positive for
hepatitis C (HCV) antibody are eligible only if polymerase chain reaction is negative
for HCV RNA.

- Current or prior use of immunosuppressive medication within 14 days before the first
dose of study drug. The following are exceptions to this criterion:

- Intranasal, inhaled, topical steroids, or local steroid injections (e.g. intra
articular injection)

- Systemic corticosteroids at physiologic doses not to exceed 10 mg/ day of
prednisone or its equivalent

- Steroids as premedication for hypersensitivity reactions (e.g. CT scan
premedication)

- Receipt of live attenuated vaccine within 30 days prior to the first dose of IP. Note:
Patients, if enrolled, should not receive live vaccine whilst receiving IP and up to
30 days after the last dose of IP.

- Female patients who are pregnant or breastfeeding or male or female patients of
reproductive potential who are not willing to employ effective birth control from
screening to 180 days after the last dose of durvalumab

+ oleclumab or 90 days after the last dose of durvalumab monotherapy, whichever is the
longer time period

- Known allergy or hypersensitivity to any of the study drugs or any of the study drug
excipients

- Prior randomization or treatment in a previous durvalumab and/or oleclumab clinical
study regardless of treatment arm assignment

- Judgment by the investigator that the patient is unsuitable to participate in the
study and the patient is unlikely to comply with study procedures, restrictions and
requirements