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Aberrant expressions of various long non-coding RNAs (lncRNAs) have been involved in the progression and pathogenesis of various carcinomas. However, the expression and biological function of SLCO4A1-AS1 in colorectal cancer (CRC) remain poorly understood. Gain- and loss-of-function assays were applied to determine the roles of SLCO4A1-AS1 in autophagy and CRC progression. qRT-PCR and in situ hybridization (ISH) results showed that SLCO4A1-AS1 was positively associated with PARD3 expression in CRC tissues. In vitro and in vivo studies revealed that SLCO4A1-AS1 knockdown repressed cytoprotective autophagy as assayed by transmission electron microscopy (TEM), and inhibited cell proliferation by directly targeting partition-defective 3 (PARD3). Mechanistically, SLCO4A1-AS1 acted as a sponge of miR-508-3p, leading to upregulation of PARD3 and promotion of CRC cell proliferation. The current study demonstrates that the SLCO4A1-AS1/miR-508-3p/PARD3/autophagy pathway play a critical role in CRC cell proliferation, and might provide novel targets for developing therapeutic strategies for CRC.

LncRNA SLCO4A1-AS1 promotes colorectal cancer cell proliferation by enhancing autophagy via miR-508-3p/PARD3 axis