Spatial profiling technologies for research and clinical application in head and neck squamous cell cancers

Areas of application of spatial microenvironment profiling technology in HNSCC. Comprehensive insight into tumour multiomics, providing in-depth TEM characterisation including cell type, density, location and cell-cell interactions. Understanding these interactions and the TME has the potential to improve treatment efficacy, develop new therapies and identify predictive biomarkers of treatment response. • Spatial profiling reveals the complexity of immune phenotypes, tumor heterogeneity, and key biomarkers in HNSCC microenvironments. • Clinical trials using spatial profiling enable real-time, in situ analysis of drug mechanisms and immune modulation. • Open-access platforms such as SpatialDB and the Human Cell Atlas support collaboration and standardization in HNSCC research. The efficacy of clinical treatment in head and neck squamous cell carcinoma (HNSCC) may be influenced by interactions within the tumor microenvironment (TME), involving non-malignant cells such as tumor-infiltrating lymphocytes (TILs) and cancer-associated fibroblasts (CAFs). These cells are crucial parts of the complex and dynamic TME. High-throughput spatial profiling technologies show remarkable potential in identifying predictive biomarkers in HNSCC’s TME. Despite advancements in molecular characterization, the translation of these insights into clinical practice remains limited. Understanding these interactions and the TME is pertinent for developing effective therapies and pinpointing biomarkers that predict treatment responses. Spatial profiling also provides comprehensive insights into the cancer multi-omics by characterizing diverse and heterogeneous cell type, cell density, location, and intercellular interactions within the TME. HNSCC continues to be a major global health issue with rising incidence and mortality rates. Although immunotherapies have been effective for some, they benefit only a subset of patients. Spatial profiling helps uncover actionable biomarkers by exposing tumor heterogeneity and immune system interactions, paving the way for more precise medicine in HNSCC. Although the clinical application of multi-omics tumor profiling is still nascent, these technologies hold promise in enhancing our understanding of HNSCC biology and immuno-oncology, guiding future precision-treatment strategies. This review outlines the applications of high-throughput spatial profiling technologies in both research and clinical settings for HNSCC, highlighting their potential to improve therapeutic strategies through an enhanced understanding of the HNSCC microenvironment. The successful integration of spatial profiling technologies into HNSCC research and clinical practice depends on a standardized, multicenter pipeline that ensures data consistency, seamless integration, and scalability. By combining high-resolution spatial transcriptomics with clinical and genomic insights, this approach has the potential to refine biomarker discovery, enhance patient stratification, and optimize immunotherapy strategies, ultimately paving the way for more precise and effective cancer treatments.