A Multi-Scale Neighbor Topology Guided Transformer and Kolmogorov-Arnold Network Enhanced Feature Learning Model for Disease-Related circRNA Prediction

As circular non-coding RNA (circRNA) is closely associated with various human diseases, identifying disease-related circRNAs can provide a deeper understanding of the mechanisms underlying disease pathogenesis. Advanced circRNA-disease association prediction methods mainly focus on graph learning techniques such as graph convolutional networks. However, these methods do not fully encode the multiscale neighbor topologies of each node, and the dependencies among the pairwise attributes. We propose a multi-scale neighbor topology-guided transformer with Kolmogorov-Arnold network (KAN) enhanced feature learning for circRNA and disease association prediction, termed MKCD. First, MKCD incorporates an adaptive multiscale neighbor topology embedding construction strategy (AMNE), which generates neighbor topologies covering varying scopes of neighbors by random walks. Second, we design a dynamic multi-scale neighbor topology-guided transformer (DMTT) that leverages the multi-scale neighbor topologies to guide the learning of relationships among circRNA, miRNA, and disease nodes. The multi-scale neighbor topology is dynamically evolved, providing adaptive guidance to the transformer's learning process. Third, we establish a feature-gated network (FGN) to evaluate the importance of topological features and the original node attributes. Finally, we propose an adaptive joint convolutional neural networks and KAN learning strategy (ACK) to learn the global and local dependencies of pairwise features. Comprehensive comparison experiments show that MKCD outperforms six state-of-the-art methods, improving AUC and AUPR by at least 14.1% and 7.6%, respectively. Ablation experiments further validate the effectiveness of AMNE, DMTT, FGN and ACK innovations. Case studies on three diseases further validate the application value of our method in discovering reliable circRNA candidates for the diseases.