THE-0504 in Patients With Solid Tumors

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• Patients will be enrolled in the study if they meet all the following criteria:
• written informed consent obtained
• both gender adult (≥ 18 years) patients
• diagnosis of solid tumor. Preferably, but non-limited, tumor types are the following: Small Cell Lung Cancer (SCLC), Colorectal Carcinoma (CRC), Pancreas Adenocarcinoma (PaAdCa), Gastric Cancer (GC) and Triple Negative Breast Cancer (TNBrCa)
• measurable metastatic disease or locally advanced unresectable tumors
• have exhausted all EMA-approved treatment options
• ECOG Performance Status graded as 0 or 1
• patients able to understand the full nature and the purpose of the trial, including possible risks and side effects, able to cooperate with the Investigator and to comply with the requirements of the entire trial (ability to attend all the planned trial visits according to the time limits included) based on Investigator's judgement
• adequate liver function as assessed by following laboratory tests to be conducted within 28 days before the first dose of study treatment:; Total bilirubin ≤ 1.5 × ULN (or ≤ 3 X ULN for patients with documented Gilbert-Meulengracht Syndrome, or for patients with hyperbilirubinemia considered due to liver metastasis); Aspartate transaminase and alanine transaminase ≤ 2.5 × ULN (or ≤ 5 × ULN if due to liver involvement by tumor)
• adequate kidney function as assessed by following laboratory test to be conducted within 28 days before the first dose of study treatment:; Estimated glomerular filtration rate (eGFR) ≥ 60 mL/min per 1.73 m2 according to the CKD-EPI formula
• adequate bone marrow function as defined as:; Hgb ≥ 9 g/dL; ANC ≥1.5x109/L; PLT≥100.0 x109/L
• Female patients of childbearing potential and male patients who are sexually active with women of childbearing potential will have to mandatorily use an appropriate method of contraception, according to the definition of Note 3 of ICH M3 Guideline, for the entire duration of the trial and for a minimum of 12 months after last administration of the IMP

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• have any unresolved toxicity of Grade ≥ 2 from previous anti-cancer treatment, except for alopecia and skin pigmentation. Patients with chronic, but stable Grade 2 toxicities may be allowed to enrol after agreement between the Investigator and Sponsor
• had not tolerated previously administered Top1 inhibitor treatments
• known active CNS metastatic disease (patients with CNS metastases that are treated with radiotherapy and are stable for at least 28 days before study treatment start could be considered eligible)
• serious concurrent illness
• History of severe allergic or anaphylactic reactions to previous protein-based therapy
• Currently receiving anticoagulation therapy with warfarin
• HBV infection, unless on stable anti-viral therapy for > 4 weeks prior to the planned first dose of study intervention and viral load confirmed as undetectable; and HCV infection, unless the participant has received curative treatment and viral load was confirmed as undetectable
• Patients on chronic (more than 10 days) administration of systemic, high-dose corticosteroids (≥4 mg Dexamethasone or equivalent), not amenable for reduction or suspension
• Other concurrent medical or psychiatric conditions that, in the Investigator's opinion, may be likely to confound study interpretation or prevent completion of study procedures and follow-up examinations
• Patients considered to be unsuitable to participate, in the Investigator's opinion, for any other reason (e.g. consequences of previous medical and/or surgical procedures or other medical or ethical reasons)
• Concomitant participation in other clinical trials or participation in the evaluation of any investigational drugs/products up to 4 weeks before this trial (in any case, enrolment procedure should start only after the complete washout of the drugs/products under investigation**); or previous participation in the same trial or planned to receive other investigational products during the study
• additional malignancy in the last 5 years. Exceptions include basal cell carcinoma of the skin, squamous cell carcinoma of the skin, or in situ cervical cancer that has undergone potentially curative therapy
• Clinically significant iron metabolism disorders (e.g., sickle cell anemia) or use of iron chelators treatments
• Moderate (Child-Pugh B) or severe (Child-Pugh C) hepatic impairment
• Multiple Sclerosis (MS) or other demyelinating disease, Eaton-Lambert syndrome, history of haemorrhagic or ischemic stroke within the last 6 months, or alcoholic liver disease
• Known autoimmune disease, uncontrolled diabetes, vitiligo, or stable thyroid disease
• History of drugs and/or alcohol abuse
• Hgb < 9 g/dL
• Prolonged QTc interval
• Known history of HIV infection, unless all the following are applicable:; receiving an approved, stable, effective combination antiretroviral therapy regimen for ≥ 3 months prior to the planned first study intervention; CD4 T-cell count > 350 cells/μL; CD4 T-cell nadir (lowest historical count) > 350 cells/μL, and • viral load confirmed as < 50 copies/mL
• Patients will not be enrolled if they meet any of the following criteria:
• pregnant (as determined by a blood pregnancy test at the screening visit) or lactating women
• male patients who are willing to father children during the trial or in the 12 months after the end of IMP administration
• ECOG Performance Status > 2
• Transfusion dependent anemia with transfusion dependency of ≥3 months
• Iron overload, hereditary hemochromatosis and similar
• Non-healing wound(s), except for ulcerative lesions caused by the underlying neoplasm
• Planned relocation during the study, which would make impossible to attend the scheduled visits and follow-ups