Advancements in CRISPR/Cas Technologies for Sensitive Cancer Detection: Mechanisms, Platforms, and Clinical...

Early cancer detection is critical for improving patient outcomes, yet current diagnostic approaches often fail to identify malignancies when tumor-specific biomarkers are relatively scarce. Emerging CRISPR/Cas-based technologies have revolutionized the ultra-sensitive detection of cancer biomarkers in liquid biopsies, overcoming the inherent limitations of traditional diagnostic approaches such as tissue biopsies and imaging, which frequently fail to detect early-stage malignancies with sufficient sensitivity. This review explores recent advances in CRISPR/Cas diagnostics (CRISPR/Cas-Dx) that employ programmable CRISPR effectors, including Cas9, Cas12, Cas13, and Cas14. In particular, the collateral (trans-) cleavage activities of Cas12, Cas13, and Cas14 enable signal amplification for highly sensitive detection of circulating tumor DNA, microRNAs, exosomes, and other multi-omics biomarkers, often without the need for extensive nucleic acid amplification. Representative CRISPR/Cas-Dx platforms include amplification-coupled assays, amplification-free frameworks, biosensing and multiplexing capabilities, and new digital or droplet-based configurations that include artificial intelligence to improve analytical precision. These technologies demonstrate single-molecule resolution and adaptability for point-of-care testing in malignancies such as non-small cell lung, colorectal, and breast carcinoma. Finally, we outline a clinical translation roadmap encompassing manufacturability, regulatory and standardization requirements, and real-world implementation challenges. This perspective offers a blueprint for CRISPR-powered, ultra-sensitive liquid biopsy diagnostics that can enable population-scale early cancer screening and truly preventive oncology by bridging molecular insights, engineering innovation, and clinical imperatives.