The purpose of this study is to assess the safety and tolerability and to determine the dose of IPH5201 that can be used as monotherapy or in combination with durvalumab +/- oleclumab in subjects with advanced solid tumors.

Study D6770C00001 is a Phase 1, first-in-human, multicenter, open-label, dose-escalation study to evaluate the safety, tolerability, antitumor activity, pharmacokinetics, and immunogenicity of IPH5201 in adult subjects with advanced solid tumors, when administered as monotherapy or in combination with durvalumab ± oleclumab.

Inclusion Criteria:

• Adult subjects; age ≥ 18 years
• Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1.
• Subjects diagnosed with advanced solid tumors.
• For Part 1 and Part 2 (IPH5201 in monotherapy or combined with durvalumab):Subjects must be refractory to standard therapy or for which no standard therapy exists.
• For Part 3 (IPH5201 combined with durvalumab and oleclumab): Subjects must have received and radiologically progressed on 1 prior line of systemic therapy for metastatic pancreatic ductal adenocarcinoma.
• Subjects must have at least 1 measurable lesion according to RECIST v1.1.
• Subjects must provide tumor specimens .

Exclusion Criteria:

• Receipt of any conventional or investigational anticancer therapy (anti-CTLA-4, anti-PD-1, anti-PD-L1 antibodies) within 21 days of the planned first dose.

• Receipt of agents targeting CD73, CD39, or adenosine receptors.

• Concurrent enrollment in another therapeutic clinical study.

• Any toxicity (excluding alopecia) from prior standard therapy that has not been completely resolved to baseline at the time of consent.

  • No toxicity leading to permanent discontinuation of prior IO therapy
  • Subjects must not have required the use of additional immunosuppression other than corticosteroids

• Active or prior documented autoimmune or inflammatory disorders within the past 5 years

• Cardiac and vascular criteria:

  • Presence of myocardial infarction or unstable angina , or stroke, within 6 months.
  • Congestive heart failure, serious cardiac arrhythmia requiring medication, or uncontrolled hypertension
  • History of severe hypertension
  • History of any grade of blood clot within 6 months

• Active infection, including tuberculosis; hepatitis B virus (HBV); hepatitis C virus (HCV); or human immunodeficiency virus (HIV)

• Uncontrolled illness including certain lung diseases, uncontrolled diabetes, serious chronic gastrointestinal conditions associated with diarrhea, or psychiatric illness/social situations that would limit compliance with study.

• Other invasive malignancy within 2 years.

• Major surgery within 28 days prior to first dose

• Female subjects who are pregnant or breast feeding