The purpose of this study is to evaluate the safety, tolerability, pharmacokinetic, pharmacodynamic, preliminary anti-tumor activity, and to determine the recommended Phase II dose (RP2D) of the ALE.P02 monotherapy in adult patients with selected squamous solid tumors.
Have disease and treatment history as: Have histologically or cytologically confirmed advanced locally recurrent and inoperable or metastatic SqNSCLC, HNSCC (nasopharyngeal cancer included), ESCC or CSCC.
Phase I Dose Escalation: Have received at least one systemic standard of care regimen and being refractory or intolerant to the treatment.
Phase I RDE and Phase II: Have received no more than 2 lines of systemic standard of care regimen and being refractory or intolerant to the treatment.
Have provided tissue for CLDN1 analysis in a central laboratory.
Diagnosed with cancers of predominantly non-squamous histology (eg, adenosquamous carcinoma) or adenocarcinoma.
Has received antineoplastic therapies prior to study intervention within specified time frame.
Has rapidly progressing disease (eg, tumor bleeding, uncontrolled tumor pain).
Patients with uncontrolled diabetes.