Overview

This is the first in human study of KK2260. In Part 1, the maximum tolerated dose (MTD) will be determined while evaluating the safety and tolerability of KK2260 in patients with advanced or metastatic solid tumors (any cancer type). Part 2 will compare the safety and tolerability of KK2260 in patients with multiple cancer types in multiple dose regimen arms.

Eligibility

Inclusion Criteria:

<Common Inclusion Criteria to Part 1 and Part 2>

1. Patients who have given informed written consent.
2. Male or female subjects ≥18 years of age, at time of signing informed consent.
3. Subjects who are refractory to standard treatment, intolerant of standard treatment, for whom standard treatment does not exist, or who have refused standard treatment.
4. Patients with measurable disease according to RECIST version 1.1
5. Patients who have had the certain periods between the date of completion of prior therapy and the date of enrollment
6. Subjects who agree to have a tumor biopsy as part of the baseline examination. Patients who have difficulty in performing a tumour biopsy and have agreed to submit a previously collected stored specimen.
7. Patients with an ECOG PS of 0 or 1 at baseline.
8. Patients with haematopoietic, hepatic, renal, cardiac and respiratory functions that meet certain criteria in a baseline test.

        <Additional Inclusion Criteria for Part 1> 1) Patients with pathologically diagnosed
        advanced or metastatic solid tumors.
        <Additional Inclusion Criteria for Part 2a>
        1) Patients with pathologically diagnosed with advanced or metastatic esophageal cancer.
        <Additional Inclusion Criteria for Part 2b>
          1. Patients with advanced or metastatic head and neck cancer whose primary site of origin
             is the oral cavity, oropharynx, hypopharynx, larynx, nasal cavity, or paranasal
             sinuses.
          2. Patients with pathologically diagnosed squamous cell carcinoma.
        Exclusion Criteria:
        <Common Exclusion Criteria to Part 1 and Part 2>
          1. Patients with central or brain pia mater metastases that are untreated and symptomatic
             or that require treatment.
          2. Patients with concurrent multiple or synchronous cancers, or with iatrogenic multiple
             or synchronous cancers with a disease-free interval of 5 years or less.
          3. Patients receiving continuous systemic administration of steroids or other
             immunosuppressive drugs.
          4. Patients who have had a Grade 3 or higher allergic reaction to an antibody agent or an
             additive of the study drug.
          5. Patients who have not recovered to Grade 1 or below from adverse events caused by
             previously administered anticancer therapy.
          6. Patients with active interstitial lung disease or a history of active interstitial
             lung disease.
          7. Patients with infectious diseases requiring systemic treatment.
          8. Patients with a fever of 38.0°C or higher at the time of registration.
          9. Patients who test positive for Hepatitis B virus antigen or antibody, Hepatitis C
             virus antibody, or HIV antibody in a baseline test.