Abstract Diabetes induces progressive transcriptional reprogramming in the heart and kidney, yet their tissue-specific temporal dynamics and cellular mechanisms remain incompletely understood. In this study, we employed a longitudinal design with dense sampling intervals, performing time-series bulk RNA-seq on heart and kidney tissues across six bi-weekly intervals from Control, high-fat diet (HF), diabetes (DM), and insulin-treated (INS) mice (n=38 total samples).