Abstract:Objective To analyze the relationship of the microRNA-410-3p (miR-410-3p) and Krüppel-like factor 6 (KLF6) levels with the clinical characteristics and severity of ulcerative colitis (UC).Methods A retrospective cohort study was conducted on 128 patients with UC admitted to Xinjiang Uygur Autonomous Region Hospital of Traditional Chinese Medicine between December 2022 and September 2025. Patients were categorized into four groups based on disease severity: remission group, mildly active group, moderately active group, and severely active group. Additionally, 90 healthy individuals undergoing routine health check-ups during the same period were selected as the control group. The relative expression of miR-410-3p was detected using reverse transcription polymerase chain reaction (RT-PCR), while KLF6 levels were measured via enzyme-linked immunosorbent assay (ELISA). Comparisons were made between the UC group and the control group, as well as among UC patients with varying clinical characteristics and disease severity, regarding relative expression of miR-410-3p and KLF6 levels.Results The UC group exhibited lower relative expression of miR-410-3p and higher KLF6 levels than the control group (P < 0.05). As the lesion area expanded, the relative expression of miR-410-3p in patients gradually decreased (P < 0.05), while the level of KLF6 gradually increased. The relative expression of miR-410-3p in UC patients with the chronic persistent type was lower than that in patients with the chronic relapsing type and the initial onset type (P < 0.05), whereas the KLF6 level in patients with the initial onset type, chronic relapsing type, and chronic persistent type gradually increased (P < 0.05). With the increase in disease severity, the relative expression of miR-410-3p in patients gradually decreased (P < 0.05).Conclusion Decreased relative expression of serum miR-410-3p and elevated KLF6 levels correlate with increased UC activity, expanded lesion extent, and chronic disease progression.