Study With Bispecific Antibody Engaging T-cells, in Patients With Progressive Cancer Diseases With Positive PSCA Marker

This dose-escalating phase I trial assesses for the first time the safety, the side effects and the harmlessness, as well as the therapeutical benefit of the new study drug GEM3PSCA in patients with prostate stem cell antigen (PSCA) expressing cancer types which failed to respond to standard therapy.


Eligibility Criteria:
Inclusion Criteria:

1. Male or female patients, ≥ 18 years of age
2. Progressive PSCA positive cancer (urogenital tract (renal, transitional cell, prostate), non-small cell lung) refractory to standard treatments and with no other available standard or curative treatment
3. Measurable disease based on Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1
4. Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 2
5. Life expectancy of at least 2 months
6. Platelets \> 50,000/µl
7. Hemoglobin \> 9 g/dl
8. Adequate renal and hepatic laboratory assessments
9. Adequate pulmonary function with oxygen saturation (SpO2) ≥ 90 % and no structural pulmonary disease which might jeopardize patient safety according to judgement of the investigator
10. Left ventricular ejection fraction (LVEF) of ≥ 45 %
11. Existing port-system or central venous catheter resp. acceptance of implantation of a device
12. A female of childbearing potential may be enrolled providing she has a negative pregnancy test at screening visit and is routinely using a highly effective method of birth control resulting in a low failure rate (e.g. hormonal contraception, intrauterine device, total sexual abstinence or sterilization) until 3 months from the last study drug administration. Male patients must also practice a highly effective method of birth Control
13. Able to give written informed consent

Exclusion Criteria:

1. Other malignancy requiring active therapy
2. Non-measurable tumor disease
3. Patients with active brain metastases (patients with brain metastases or residue after resection with stable size for 6 months in MRI not older than 8 weeks, after consultation with the sponsor, are not excluded from the trial)
4. Use of chemotherapy and radiotherapy within 2 weeks prior to start of trial medication
5. Use of checkpoint inhibitors (having a marketing authorization) within a washout of 5 x t1/2 (half-life); patients with experimental checkpoint inhibitors at all
6. Other investigational drug within the past 4 weeks before start of trial medication
7. Patients undergoing renal dialysis
8. Pulmonary disease with clinical relevant hypoxia
9. Evidence of active, non-infectious pneumonitis or history of interstitial lung disease
10. Cardiac disease: i.e. heart failure NYHA (New York Heart Association) III or IV, unstable coronary artery disease
11. Active central nervous disease (e.g. Parkinson, multiple sclerosis, seizures) and stroke within last 6 months
12. Active gastrointestinal ulceration or bleeding within the last 6 months unless related to underlying malignant disease
13. Renal outflow obstruction, macroscopic or significant microscopic hematuria
14. Active infectious diseases considered by investigator to be incompatible with protocol
15. Major surgery within 28 days
16. Autoimmune diseases requiring steroids at a dose above 10 mg prednisolone equivalent or other immunosuppressants
17. Pregnant or breastfeeding women
18. Psychiatric disorders, drug and/or alcohol abuse
19. Known history of human immunodeficiency virus (HIV) or active/chronic infection with hepatitis C virus (HCV) or hepatitis B virus (HBV)
20. Known hypersensitivity to GEM3PSCA excipients
21. Evidence suggesting that the patient is not likely to follow the study protocol (e.g. lacking compliance)
22. Incapability of understanding purpose and possible consequences of the trial
23. Patients who should not be included according to the opinion of the investigator