Selinexor With Multiple Standard Chemotherapy Regimens in Treating Patients With Advanced Malignancies

PRIMARY OBJECTIVES:

I. To establish the safety and tolerability of selinexor when given in combination with
standard chemotherapy regimens.

SECONDARY OBJECTIVES:

I. To determine disease control and progression free survival of selinexor administered with
standard chemotherapy treatments.

EXPLORATORY OBJECTIVES:

I. To determine the correlation of translational biomarkers. II. To compare serial assessment
of mutation status in biopsies obtained at baseline and progression after clinical response
to combination therapy.

OUTLINE: This is a dose-escalation study of selinexor. Patients are assigned to 1 of 13
treatment arms.

ARM A: Patients receive selinexor orally (PO) on days 1, 8, and 15 and carboplatin
intravenously (IV) over 30 minutes on day 1. Treatment repeats every 21 days for 6 courses in
the absence of disease progression or unacceptable toxicity. After 6 courses, patients can
continue single agent selinexor until disease progression. (ARM CLOSED)

ARM B: Patients receive selinexor PO twice weekly (e.g. Monday/Wednesday or Tuesday/Thursday
or Wednesday/Friday or Thursday/Saturday or Friday/Sunday) on days 1-14. Patients then
receive selinexor PO on days 1, 3, 8 and 10 and paclitaxel IV over 3 hours on days 1 and 8.
Treatment repeats every 21 days in the absence of disease progression or unacceptable
toxicity. After 8 courses of combination treatment, patients can continue single agent
selinexor until disease progression.

ARM C: Patients receive selinexor PO on days 1, 8, and 15 and eribulin mesylate IV over 1
hour on days 1 and 8. Combination treatment repeats every 21 days for 6 courses in the
absence of disease progression or unacceptable toxicity. After 6 courses, patients can
continue single agent selinexor until disease progression.

ARM D: Patients receive selinexor PO on days 1, 8, and 15, doxorubicin hydrochloride IV over
90 minutes and cyclophosphamide IV over 30 minutes on day 1. Treatment repeats every 21 days
for 6 courses in the absence of disease progression or unacceptable toxicity. After 6
courses, patients can continue single agent selinexor until disease progression. (ARM CLOSED)

ARM E: Patients receive selinexor PO on days 1, 8, and 15 and carboplatin IV over 30 minutes
and paclitaxel IV over 3 hours on day 1. Treatment repeats every 21 days for up to 8 courses
depending on cancer type (6 courses for non-small cell lung cancer, up to 8 courses for
ovarian cancer and other histological malignancies) in the absence of disease progression or
unacceptable toxicity. After 6 to 8 courses, patients can continue single agent selinexor
until disease progression. (ARM CLOSED)

ARM F: Patients receive selinexor PO on days 1, 8, and 15 and carboplatin IV over 30 minutes
and pemetrexed disodium IV over 10 minutes on day 1. Treatment repeats every 21 days for 6
courses in the absence of disease progression or unacceptable toxicity. After 6 courses,
patients can continue single agent selinexor until disease progression. (ARM CLOSED)

ARM G: Patients receive selinexor PO on days 1, 8, and 15 and topotecan hydrochloride IV over
30 minutes on days 1-5. Treatment repeats every 21 days for 8 courses in the absence of
disease progression or unacceptable toxicity. After 8 courses, patients can continue single
agent selinexor until disease progression. (ARM CLOSED)

ARM H: Patients receive selinexor PO on days 1, 8, 15 and 22, irinotecan hydrochloride IV
over 90 minutes, fluorouracil continuous IV and leucovorin calcium IV over 2 hours on days 1
and 15. Treatment repeats every 28 days for 6 courses in the absence of disease progression
or unacceptable toxicity. After 6 courses, patients can continue single agent selinexor until
disease progression. (ARM CLOSED)

ARM I: Patients receive selinexor PO on days 1, 8 and 15 and irinotecan hydrochloride IV over
90 minutes on days 1 and 8. Treatment repeats every 21 days for up to 8 courses in the
absence of disease progression or unacceptable toxicity. After 8 courses, patients can
continue single agent selinexor until disease progression. (ARM CLOSED)

ARM J: Patients receive selinexor PO on days 1, 8 and 15, capecitabine PO twice daily (BID)
on days 1-14 and oxaliplatin IV over 2 hours on day 1. Treatment repeats every 21 days for up
to 8 courses in the absence of disease progression or unacceptable toxicity. After 8 courses,
patients can continue single agent selinexor until disease progression. (ARM CLOSED)

ARM K: Patients receive selinexor PO on days 1, 8, 15, and 22 and olaparib PO BID on days
1-28. Courses repeat every 28 days in the absence of disease progression or unacceptable
toxicity.

ARM L: Patients receive selinexor PO twice weekly (e.g. Monday/Wednesday or Tuesday/Thursday
or Wednesday/Friday or Thursday/Saturday or Friday/Sunday) and pembrolizumab IV over 30
minutes on day 1. Courses repeat every 21 days in the absence of disease progression or
unacceptable toxicity.

ARM M: Patients receive selinexor PO twice weekly (e.g. Monday/Wednesday or Tuesday/Thursday
or Wednesday/Friday or Thursday/Saturday or Friday/Sunday) and nivolumab IV over 30 minutes
on days 1 and 15. Courses repeat every 28 days in the absence of disease progression or
unacceptable toxicity.

Patients may continue to receive selinexor and chemotherapy after confirmed progressive
disease in the absence of clinical deterioration and if the investigator considers that the
patient continues to receive benefit from the treatment.

After completion of study treatment, patients are followed up every 12 weeks for 1 year.

Inclusion Criteria:

- Patients must have histologically or cytologically confirmed malignant neoplasms (not
including hematological malignancies and brain tumors) untreated or previously treated
requiring further treatment; patients must be refractory to, and intolerant of,
established therapy known to provide clinical benefit for their condition; patients in
Arm L (pembrolizumab) and Arm M (nivolumab) can be treatment naive and do not have to
fail first line nivolumab or pembrolizumab if they have disease where pembrolizumab or
nivolumab are Food and Drug Administration (FDA) approved for the first-line setting

- For all arms except Arm L (pembrolizumab) and Arm M (nivolumab), patients must have
failed prior standard curative chemotherapy for their disease; subjects must have
failed, be intolerant to, or be ineligible for any potentially curative approved
treatment, irrespective of line of therapy

- Patients must have measurable disease (Response Evaluation Criteria in Solid Tumors
[RECIST] 1.1)

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

- The patient must be recovered from a prior major surgery; the major surgery must be
performed at least 4 weeks prior to consent date

- Platelets >= 125 x 10^9/L (for Arm L pembrolizumab and Arm M nivolumab and expansion
cohorts for all arms, platelets >= 100 x 10^9/L)

- Hemoglobin >= 10 g/dL (for Arm L pembrolizumab and Arm M nivolumab and expansion
cohorts for all arms, hemoglobin >= 9 g/dL

- Absolute neutrophil count (ANC) >= 1.5 x 10^9/L

- White blood cells (WBC) >= 3 x 10^9/L, transfusions and growth factors are allowed

- Alanine transaminase (alanine aminotransferase [ALT]) =< 2 x upper normal limit (ULN)
(in the expansion cohort, patients with known liver involvement may have ALT =< 5 x
ULN); aspartate aminotransferase (AST) =< 2 x ULN (in the expansion cohort, patients
with known liver involvement may have AST =< 5 x ULN)

- Alkaline phosphatase < 4 x ULN

- Total bilirubin =< 2 x ULN (in the expansion cohort, patients with Gilbert's syndrome
[hereditary indirect hyperbilirubinemia] who must have a total bilirubin of =< 3 x
ULN)

- Albumin >= 3 g/dL

- Renal function defined as a calculated or measured glomerular filtration rate (GFR) >=
30 mL/min

- The patient has recovered to grade =< 1 by the National Cancer Institute Common
Terminology Criteria for Adverse Events, version 4.03 (NCI-CTCAE v4.03) from the
effects of recent surgery, radiotherapy, chemotherapy, hormonal therapy, or other
targeted therapies, with the exception of alopecia; the exceptions for such effects
are allowed lab values of =< grade 2 specified elsewhere in these inclusion criteria

- Life expectancy of at least 12 weeks

- Able to swallow and retain oral medication

- Patients must give informed consent according to the rules and regulations of the
individual participating sites

- Negative serum pregnancy test in women of childbearing potential within 7 days of
first dose of treatment and patients of child-bearing potential must agree to use
effective contraception during/after 3 months post dose; a woman of childbearing
potential is defined as a premenopausal female capable of becoming pregnant; this
includes women on oral, injectable or mechanical contraception; women who are single
and women whose male sexual partners have been vasectomized or whose male sexual
partners have received or are utilizing mechanical contraceptive devices

- For the Arm B (paclitaxel) expansion cohort, patients must have ovarian carcinoma

- For Arm C (eribulin) expansion cohort, patients must have triple negative breast
cancer (eribulin naive)

- For Arm K (olaparib), patients must have pre-identified BRCA mutant cancer

Exclusion Criteria:

- Evidence of complete or partial bowel obstruction

- Patients with primary central nervous system (CNS) tumor or CNS tumor involvement;
however, patients with metastatic CNS tumors may participate in this study if the
patient is:

- > 4 weeks from prior therapy completion (including radiation and/or surgery)

- Clinically stable with respect to the CNS tumor at the time of study entry

- Not receiving steroid therapy in treating CNS tumor or CNS tumor involvement

- Not receiving anti-convulsive medications (that were started for brain
metastases)

- Need of total parenteral nutrition

- Prior treatment with an agent targeting the exportin

- Allergic to selinexor or any of the chemotherapy intended to receive

- Pregnancy or lactation

- Radiation (except planned or ongoing palliative radiation to bone outside of the
region of measurable disease) =< 3 weeks prior to study drug administration date

- Chemotherapy, or immunotherapy or any other systemic anticancer therapy =< 3 weeks
prior to study drug administration date; patients receiving anti-PD-1 treatment, and
continue to receiving this treatment in combination with selinexor (Arms L and M), can
start receiving the selinexor and anti-PD-1 combination without washout of the prior
anti-PD-1 antibody

- Diagnosis or recurrence of invasive cancer other than the present cancer within 3
years (except basal or squamous cell carcinoma of the skin that has been definitively
treated)

- Major surgery within four weeks before consent date

- Unstable cardiovascular function: symptomatic ischemia (chest pain of cardiac origin),
or uncontrolled clinically significant conduction abnormalities (e.g. ventricular
tachycardia on antiarrhythmics are excluded and 1st degree atrioventricular [AV] block
or asymptomatic left anterior fascicular block [LAFB]/right bundle branch block [RBBB]
will not be excluded), or congestive heart failure (CHF) of New York Heart Association
(NYHA) class >= 3, or myocardial infarction (MI) within 3 months of consent date

- Uncontrolled active infection requiring parenteral antibiotics, antivirals, or
antifungals within one week prior to the first dose; active infection with concurrent
treatment is acceptable only if the patient is clinically stable

- Significantly diseased (as determined by the principal investigator [PI] or treating
physician) or obstructed gastrointestinal tract or uncontrolled vomiting or diarrhea

- Treatment with an investigational anti-cancer study drug within 3 weeks prior to study
drug administration date

- Concurrent therapy with approved or investigational anticancer therapeutics

- Medical, psychological or social conditions that may interfere with the patient's
participation in the study or evaluation of the study results

- Men whose partner is a woman of child-bearing potential, (i.e. biologically able to
conceive), and who is not employing two forms of highly effective contraception;
highly effective contraception (e.g. male condom with spermicide, diaphragm with
spermicide, intra-uterine device) must be used by both sexes during the study and must
be continued for 3 months after the end of study treatment; women of child-bearing
potential is defined as sexually mature women who are not surgically sterile or who
have not been naturally postmenopausal for at least 12 consecutive months (e.g., who
has had menses any time in the preceding 12 consecutive months)

- For Arms L (pembrolizumab) and M (nivolumab), subjects with an active, known or
suspected autoimmune disease; subjects with type I diabetes mellitus, hypothyroidism
only requiring hormone replacement, skin disorders (such as vitiligo, psoriasis, or
alopecia) not requiring systemic treatment, or conditions not expected to recur in the
absence of an external trigger are permitted to enroll

- For Arms L (pembrolizumab) and M (nivolumab), subjects receiving chronic systemic
steroid therapy (in dosing exceeding 10 mg daily of prednisone equivalent) or other
form of immunosuppressive therapy within 7 days before the first dose of study
treatment; use of inhaled or topical steroids or systemic corticosteroids =< 10 mg is
permitted

- For Arms L (pembrolizumab) and M (nivolumab), history of a prior grade 3 or 4
immune-related adverse event (irAE) or any grade ocular irAE from prior immunotherapy