A Phase I/II Open-Label, Non-Randomized Dose Escalation Study of Immunoconjugate L-DOS47

Main Inclusion Criteria: Patients will be entered in the study only if they meet all of the following criteria: 1. Male or female aged ≥ 18 years old 2. Have histologically confirmed non-squamous NSCLC that are: 1. Chemo naïve Stage IIIb or IV non-squamous NSCLC who are not candidates for chemotherapy or radiotherapy, or who refused standard therapy 2. Refractory Stage IIIb or IV non-squamous NSCLC. (Staging of non-squamous NSCLC must be assessed according to TNM, 7th edition and based on computed tomography (CT) scan.) 3. Have at least a single measurable lesion in accordance with the RECIST v1.1 criteria. 4. Eastern Cooperative Oncology Group (ECOG) performance status: 0-2 5. Have a life expectancy of ≥ 3 months 6. Have adequate bone marrow, renal and liver function Main Exclusion Criteria: 1. Are pregnant or nursing mother 2. Have a prior history of other malignancies with the exception of non melanoma skin cancer 3. Have known history of central nervous system (CNS) metastatic disease (previously treated or untreated) 4. Show evidence of active infection 5. Have received treatment in another clinical study within the 30 days before commencing study drug or have not recovered from side effects of a study drug, except for alopecia 6. Have a serious uncontrolled medical condition 7. Known positive human immunodeficiency virus (HIV), known hepatitis B surface antigen, or hepatitis C positive 8. Sustained QTc (QT interval corrected for heart rate) with Fridericia's correction \> 450 ms at screening, or a history of additional risk factors for Torsades de pointes (e.g., heart failure, hypokalemia, family history of long QT syndrome) 9. Pre-existing peripheral neuropathy ≥ CTC Grade 2 10. Have dementia or significantly altered mental status that would prohibit the understanding or rendering of informed consent or compliance with the requirements of the protocol 11. Are receiving chemotherapy during the 30 days before study treatment start; are receiving radiotherapy, targeted therapy, hormonal therapy, immunotherapy, major surgery or other study drugs during the 4 weeks before study treatment start, or have not recovered from all treatment related toxicities to Grade ≤ 1, except for alopecia. (Radiotherapy is allowed for the symptomatic treatment of bone metastases.) 12. Are taking systemic steroids (other than inhalers or topical steroids) or other medication to suppress the immune system 13. Are participating (or planning to participate) in any other clinical trial during this study.