Colorectal cancer (CRC) is a common cancer worldwide with poor prognosis. The presence of Fusobacterium nucleatum (Fn) in the intestinal mucosa is associated with the progression of CRC. In this review, we explore the mechanisms by which Fn contributes to proliferation and migration of CRC cells from the following four aspects: induction of the epithelial–mesenchymal transition (EMT), regulation of the tumor microenvironment (TME), expression of oncogenic noncoding RNAs, and DNA damage. This review outlines the scientific basis for the use of Fn as a biomarker and therapeutic target in CRC.

Early diagnosis of lung cancer (LC) is challenging, treatment options are limited, and treatment resistance leads to poor prognosis and management in most patients. The Wnt/β-catenin signaling pathway plays a vital role in the occurrence, progression, and therapeutic response of LC. Recent studies indicate that non-coding RNAs (ncRNAs), including microRNAs (miRNAs), long non-coding RNAs (lncRNAs), and circular RNAs (circRNAs) function as epigenetic regulators that can promote or inhibit Wnt/β-catenin signaling by interacting with Wnt proteins, receptors, signaling transducers, and transcriptional effectors, thereby affecting LC cell proliferation, metastasis, invasion, and treatment resistance. Deepening our understanding of the regulatory network between ncRNAs and the Wnt/β-catenin signaling pathway will help overcome the limitations of current LC diagnosis and treatment methods. This article comprehensively reviews the regulatory mechanisms related to the functions of ncRNAs and the Wnt/β-catenin pathway in LC, examining their potential as diagnostic and prognostic biomarkers and therapeutic targets, aiming to offer new promising perspectives for LC diagnosis and treatment.