the company's decision to de-prioritize 4718 development

The purpose of this study is to evaluate increasing dose levels of VS-4718 administered in combination with gemcitabine and nab-paclitaxel in subjects with advanced cancer and to determine a recommended Phase 2 dose (RP2D) for further development of this combination in subjects with untreated advanced pancreatic cancer.

The study is comprised of 2 sequential parts: Part A (Dose Escalation of VS-4718) in subjects with advanced cancer and Part B (Expansion) in subjects with untreated advanced pancreatic cancer.

Up to 60 evaluable subjects (i.e., subjects who complete at least 1 cycle (28 days) of therapy) will be enrolled, assuming that:

1. Part A: The maximum sample size will be 6 subjects up to 4 dose levels (exclusive of replacement subjects). However, additional subjects may be added if exploration of intermediate dose level(s) of VS 4718 is warranted. The starting dose of VS-4718 will be 200mg BID.

2. Part B: Up to 36 additional subjects may be enrolled at the RP2D. These subjects will be randomized at a 1:1 ratio to 1 of 2 treatment cohorts:

   • Cohort 1: IV treatment in 28-day cycles (nab-paclitaxel 125 mg/m2 over 30 minutes on Days 1, 8, and 15 and gemcitabine at 1000 mg/m2 over 30 minutes on Days 1, 8, and 15) and oral VS 4718 BID continuously starting on Day 1 of Cycle 1
   • Cohort 2: IV treatment for the first 2 cycles, followed by IV treatment and oral VS-4718 BID continuously starting on Day 1 of Cycle 3

Inclusion Criteria:

• Age ≥ 18 years
• Histologically or cytologically confirmed diagnosis of an advanced nonhematological malignancy (Part A) or advanced pancreatic adenocarcinoma (Part B) that is not surgically resectable
• Eligible for treatment with nab-paclitaxel and gemcitabine on Days 1, 8, and 15 in 28-day cycles as standard therapy
• Evaluable or measurable disease, as assessed by RECIST v1.1
• ECOG performance status of ≤ 1
• Adequate renal function (creatinine ≤ 1.5×ULN [upper limit of normal]) or glomerular filtration rate of ≥ 60 mL/min
• Adequate hepatic function (total bilirubin ≤ 1.5×ULN for the institution; aspartate transaminase and alanine transaminase ≤ 2.5×ULN, or ≤ 5×ULN if due to liver involvement by tumor; albumin ≥ 3 g/dL)
• Adequate bone marrow function (hemoglobin ≥ 9.0 g/dL; unsupported platelets ≥ 100×109 cells/L; absolute neutrophil count [ANC] ≥ 1.5×109 cells/L without the use of hematopoietic growth factors)
• Corrected QT interval (QTc) < 470 ms
• Willing and able to participate in the trial and comply with all trial requirements

Exclusion Criteria:

• Gastrointestinal (GI) condition that could interfere with the swallowing or absorption of study medication
• Uncontrolled or severe concurrent medical condition (including uncontrolled brain metastases).
• History of upper gastrointestinal bleeding, ulceration, or perforation within 6 months prior to the first dose of protocol therapy
• Known history of stroke or cerebrovascular accident within 6 months prior to the first dose of protocol therapy.
• Part B only: Prior therapy (including investigational agents) for pancreatic cancer
• Chemotherapy or radiotherapy within 14 days prior to first dose of protocol therapy
• Active treatment for a secondary malignancy