Harbour Biomed: This phase I trial is evaluating the safety and tolerability of a novel immunotherapy (HBM4003) in patients with advanced solid tumoursA Phase 1 Open-label, Multicenter Study to Evaluate the Safety, Tolerability, Pharmacokinetics and Anti-tumor Activity of HBM4003 in Subjects With Advanced Solid Tumors

Exclusion

Part 1 and Part 2

• History of severe or not under well controlled allergic diseases, history of severe drug allergy, or are known to be allergic to macromolecular protein preparations or any component of the study drug.

• Receipt of anticancer medications or investigational drugs within the following intervals before the first administration of the study drug:

  1. CTLA-4 antibody any time prior to study drug administration;
  2. Any PD-1 or PD-L1 or Programmed cell death protein ligand 2 (PDL2)-directed antibody within 8 weeks of study drug administration;
  3. Any cancer vaccines within 3 months prior to first dose of study drug;
  4. Live vaccine within 4 weeks prior to first dose of study drug;
  5. Any other anticancer therapy within 2 weeks prior to first dose of study drug.
• Not yet recovered from surgery within 28 days prior to first dose of HBM4003 or (immune-related) toxicity related with previous treatment.

• Concomitant medication or treatments:

  1. Any concurrent chemotherapy, radiotherapy, immunotherapy, or biological therapy for cancer treatment. Concurrent use of hormones on a stable dose for non-cancer related conditions is acceptable. Androgen deprivation therapy (ADT) for advanced prostate cancers is acceptable. Local treatment of isolated non-target lesions for palliative intent is acceptable;
  2. Any traditional anti-tumor herbal medications;
  3. Receipt of red blood cells or platelets infusion, granulocyte colony stimulating factor (G-CSF) or granulocyte monocyte colony stimulating factor (GM-CSF) within 1 week of the first dose of HBM4003.
  4. Corticosteroids (>10 mg daily prednisone equivalent) or other immunosuppressive medications within 2 weeks of study drug administration; Nasal spray, inhalation, topical corticosteroids or physiological doses of systemic corticosteroids are not included.

• Have other diseases that may affect the effectiveness and safety of the study drug, such as:

  1. Known brain metastases or other central nervous system metastases that is either symptomatic or untreated, that requires concurrent treatment;
  2. Active infection requiring treatment with antibiotics within 14 days prior to first dose of HBM4003;
  3. Known history of infection with human immunodeficiency virus (HIV) or known acquired immunodeficiency syndrome (AIDS), human T lymphotropic virus 1, hepatitis B virus, or active hepatitis C virus;
  4. Suspected autoimmune disease, including but not limited to inflammatory bowel disease, autoimmune hepatitis, Guillain-Barre syndrome.
  5. Known primary immunodeficiency;
  6. Clinically significant gastrointestinal disorders (e.g. diarrhea with significant clinical meaning), active gastrointestinal bleeding, or a history of gastrointestinal perforation, acute diverticulitis, intra-abdominal abscess or gastrointestinal obstruction;
  7. Have received allogeneic organ transplantation or allogeneic hematopoietic stem cell transplantation, or have received autologous hematopoietic stem cell transplantation within 3 months prior to the first dose of study drug.
  8. Subjects with medically confirmed autoimmune coeliac disease are to be excluded. Patients with so-called gluten intolerance or other conditions labelled "coeliac disease" which are not autoimmune in nature and which are well controlled by diet should be medically confirmed as non-autoimmune "coeliac disease" and can be considered for study.
• Subjects with major cardiovascular disease.
• History of other uncured malignant diseases, except for non-melanoma skin cancer in situ, superficial bladder cancer, cervical cancer in situ that has been curatively resected, and localized prostate cancer managed by active surveillance.
• Pregnant or breastfeeding women.
• Have experienced immune-related GI adverse events on any prior immunotherapy or toxicity that led to permanent discontinuation of prior immunotherapy.
• Severe cirrhosis, hepatic atrophy, portal hypertension.
• Main portal vein thrombosis present on imaging.
• Any prior or current clinically significant ascites (moderate to massive with significantly abnormal liver function).
• Any history of hepatic encephalopathy within 12 months prior to randomization or require medications to prevent or control encephalopathy.
• Subjects weighting < 30 kg.
• Active or prior documented GI bleeding (e.g. esophageal varices or ulcer bleeding) within 12 months.

Additional criterial for HCC cohort:

• Known fibrolamellar HCC, sarcomatoid HCC, or mixed cholangiocarcinoma and HCC.
• Prior liver transplantation.
• HBV and HCV co-infection, HBV and HEV co-infection, HBV and HDV co-infection.

Other protocol-defined inclusion/exclusion criteria may apply.