Solute carrier organic anion transporter family member 1B3
(SLCO1B3)
is a gene that encodes an organic anion-transporting polypeptide (OATP) 1B3, a membrane-bound multi-specific transporter in hepatocytes.
SLCO1B3
was first reported in hepatocytes. Later, it was found that its expression is higher in colorectal cancer (CRC) than in the adjacent normal tissue. However, the role of
SLCO1B3
in CRC is not well elucidated. In this study, the correlation between
SLCO1B3
and the overall survival (OS) of CRC patients was evaluated using data from the GEO database. This study evaluated the relationship between
SLCO1B3
and the clinicopathological characteristics and prognosis of CRC patients. The effects of
SLCO1B3
knockdown, on human CRC cell proliferation, migration, and invasion
in vitro
and CRC tumorigenesis and metastasis
in vivo
were also examined. In addition, next-generation sequencing was used to identify
SLCO1B3
mediators. The results confirmed the association between
SLCO1B3
and poor OS of CRC patients, and
SLCO1B3
was identified as the top hub gene associated with the OS. The study showed that high
SLCO1B3
expression was associated with poor tumor differentiation, advanced disease stage, tumor invasion, lymph node metastasis, and poor OS. Next-generation sequencing revealed that
SLCO1B3
knockdown affected the expression of several genes involved in cancer invasion, metastasis, and DNA repair. Moreover, the western blot analysis showed that
SLCO1B3
knockdown downregulated p-STAT3, MMP-2, and MMP-9. In summary, we demonstrated that
SLCO1B3
acts as a novel carcinogen in the CRC that drives the CRC tumorigenesis and metastasis.
SLCO1B3
inhibitors, alone or in combination with current drugs, may have therapeutic benefits in CRC.