This is an open-label dose-escalating phase I/IIa study of UV1 peptide vaccination in 18 patients with NSCLC after completion of radiation therapy and/or chemotherapy. Patients will be enrolled in this study if they have achieved complete response (CR), partial response (PR) or stable disease (SD) at least 4 weeks after completion of standard first-line therapy.

The following 2-step design will be used:

Conventional dose escalation with at least 3 patients per dose level (3 selected dose levels).

Expansion of each dose level to a total of 6 patients for assessment of immune response levels.

13 UV1 vaccinations will be given during the first 6 months (week 26) of treatment unless clinical deterioration or unacceptable toxicity is encountered. Granulocyte-macrophage colony-stimulating factor (GM-CSF) (Leukine ®) will be used as an adjuvant for 11 of the 13 doses of UV1.

After completion of the main study treatment period at week 26, if the patient agrees, additional vaccinations may be considered for the following patients:

Immune responders within first 6 months

Immune non-responders providing they have at least SD