Dose-Escalation of MNPR-101-PCTA-177Lu in Solid Tumors

Inclusion criteria

• Participated in the MNPR-101-D001 study.
• Females of childbearing potential must have a negative serum pregnancy test at time of screening and a negative urine pregnancy test on Day 1 prior to study drug administration if screening is \>7 days prior to Day 1. A rapid serum pregnancy test result performed as standard of care will be accepted if available.
• Both males and females must agree to use highly effective contraceptive precautions if conception is possible during the dosing period and up to 3 months after dosing.
• Female patients who are lactating must agree to discontinue breastfeeding prior to the dose of study drug and must refrain from breastfeeding for 3 months following the last dose of study drug.

Exclusion criteria

• Chemotherapy, radiotherapy (other than short cycle of palliative radiotherapy), or immunotherapy within 14 days prior to administration of MNPR-101-PCTA-177Lu.
• Continuing ≥ Grade 3 adverse reactions from prior systemic therapy (Common Terminology Criteria for Adverse Events \[CTCAE\] version 5.0).
• Prior treatment with any radiopharmaceutical or investigational agents within 4 weeks or 5 half-lives, whichever is longer, prior to administration of the first dose of MNPR-101-PCTA-177Lu other than MNPR-101-DFO\*-89Zr.
• Have evidence of impaired organ function at Screening and prior to dosing, particularly:
• Bone marrow: i. Platelets ≤150×10\^9/L. ii. Absolute neutrophil count ≤1.5×10\^9/L. iii. Hemoglobin \<9g/dL (no red blood cell transfusion in the previous 4 weeks).
• Liver function: i. AST/ALT \>3xULN (institutional upper limits of normal) OR \>5×ULN for patients with liver metastases.
• ii. Bilirubin \>1.5xULN OR \>3xULN for patients with known Gilbert's Syndrome.
• Renal function: i. eGFR ≤45 mL/min determined using BSA-adjusted Chronic Kidney Disease Epidemiology Collaboration CKD-EPI 2021 formula \[https://www.kidney.org/professionals/kdoqi/gfr\_calculator\].
• Safety event of significance in MNPR-101-D001 study:
• a related CTCAE Grade 4 hematologic or hepatologic event
• a related CTCAE Grade 3 hematologic or hepatologic event which lasted \>30 days
• Unacceptable value for projected organ dose based upon dosimetry from the MNPR-101-D001 study that exceeds safe absorbed dose limits, as determined by Monopar.
• Other serious, non-malignant diseases (e.g., renal, hepatic, or hematologic) that may interfere with objectives of the study, safety, or compliance, as judged by the investigator.
• Cognitive impairment or contraindications that may compromise ability to give informed consent or comply with requirements of the study.