LY6D marks pre-existing resistant basosquamous tumor subpopulations

Area of Science:

• Oncology
• Dermatology
• Cancer Biology

Background:

• Understanding tumor heterogeneity is crucial for improving cancer therapy response.
• Distinct resistance mechanisms in basal cell carcinoma (BCC) are known, but cellular states remain unclear.
• Identifying specific cellular populations with plasticity is key to overcoming treatment resistance.

Purpose of the Study:

• To identify and characterize cellular populations contributing to resistance in basal cell carcinoma.
• To understand the role of cellular plasticity in treatment resistance.
• To explore LY6D as a potential marker for resistant tumor cells.

Main Methods:

• Computational analysis of tumor data.
• Organoid culture models.
• Spatial biology techniques.
• Immunohistochemistry for marker identification (LY6D).

Main Results:

• A pre-existing resistant cell population in naive BCC tumors was identified, marked by the surface marker LY6D.
• LY6D-positive cells exhibit both basal cell carcinoma and squamous cell carcinoma-like features.
• These LY6D-positive basosquamous cells function as a persister population, influenced by local environment and therapy.
• Similar LY6D-positive populations were found in other epithelial tumors, including pancreatic adenocarcinomas.

Conclusions:

• The LY6D-positive basosquamous cell population represents a significant clinical target for improving BCC treatment outcomes.
• Targeting this resistant population may offer new therapeutic strategies for various epithelial cancers.
• Further research into the plasticity and environmental interactions of these cells is warranted.