LncRNA THUMPD3-AS1 promotes the proliferation and migration of esophageal cancer cells through the miR-29a-3p/ELK1/PRDX4 signaling pathway

Esophageal cancer (ESCA) is a significant contributor to cancer-related deaths worldwide due to its aggressive nature and poor prognosis. Recent research indicates that non-coding RNAs are critical in tumor progression. This study intends to explore the interaction between LncRNA THUMPD3-AS1 and miR-29a-3p in ESCA advancement. By conducting bioinformatic analyses and validating differentially expressed genes in ESCA clinical samples, the regulatory relationship between THUMPD3-AS1, miR-29a-3p, ETS transcription factor (ELK1), and Peroxiredoxin 4 (PRDX4) was investigated using various functional assays. In vitro and in vivo experiments were also carried out to assess the impact of this interaction on tumor growth and ESCA progression. Results indicated elevated levels of THUMPD3-AS1 in ESCA tissues, acting as a sponge for miR-29a-3p, a microRNA known for its tumor-suppressive properties. This interaction relieved miR-29a-3p's inhibition of ELK1, resulting in increased PRDX4 expression. Functional tests confirmed that the THUMPD3-AS1/miR-29a-3p/ELK1/PRDX4 axis supports tumor proliferation, migration, and invasion in ESCA. Further validation of these findings was done through in vivo experiments. In conclusion, this study underscores the significance of the THUMPD3-AS1/miR-29a-3p/ELK1/PRDX4 axis as a crucial regulatory pathway in ESCA, unveiling its oncogenic role in enhancing tumor aggressiveness.