The aim of this study was to investigate β-catenin and AXIN2 expression in colorectal cancer (CRC) and relate these findings with patients' clinicopathological features and prognosis.
Finally, we determined that miR-30-5p attenuates the expression of Wnt/β-catenin signaling target genes (Axin2 and MYC), Wnt luciferase activity, and β-catenin protein levels in CRC stem cells.
Together, our study identifies a novel function of miR-103/107 in promoting colorectal cancer stemness by targeting Axin2 and elucidates the clinical relevance and prognostic value of this axis in colorectal cancer.
This study aims to determine the contribution of polymorphisms in the genes of the β-catenin destruction complex to develop CRC, specifically adenomatous polyposis coli (APC) (rs11954856 G>T and rs459552 A>T), axis inhibition protein 1 (AXIN1) (rs9921222 C>T and rs1805105 C>T), AXIN2 (rs7224837 A>G), and dishevelled 2 (DVL2) (2074222 G>A and rs222836 C>T).
We studied thirteen single nucleotide polymorphisms (SNPs) located in SFRP3 (rs7775), CTNNB1 (β-catenin) [rs4135385, rs13072632], APC (rs454886, rs459552), LRP6 (rs2075241, rs2284396), DKK4 (rs3763511), DKK3 (rs6485350), TCF4 (rs12255372) and AXIN2 (rs3923086, rs3923087, rs4791171) in patients with colorectal cancer (n = 122) and controls (n = 110).
Therefore, Axin2 may serve as either a promoter or suppressor of tumors, and the effects of its inhibition on the cell proliferation and metastasis of CRC require further elucidation.
We analysed this novel AXIN2 mutant, together with two reported AXIN2 mutants [c.1966C>T (p.Arg656Stop) and c.1994delG (p.Leu688Stop)] that cause colorectal cancer with and without oligodontia, to study the effect of the mutant p.His660Tyr on the Wnt/β-catenin signaling pathway and to compare the molecular pathogenesis of different AXIN2 mutants in tooth agenesis and carcinogenesis.
Although the biological relevance of nuclear GSK-3 level has not been fully studied, our results demonstrate that the tumor suppressor p53/miR-34 axis plays a role in regulating nuclear GSK-3 levels and Wnt signaling through the non-coding UTR of Axin2 in colorectal cancer.
To assess the contribution of Axin2 SNP to CRC susceptibility, we examined the Axin2C148T genotype in CRC patients and 170 healthy controls by PCR-RFLP.
Although Axin 1 and Axin 2 gene mutations have been found to be involved in the development of colorectal cancers, it seems to be a relatively rare event in Kashmiri population.
Whereas in CIN CRCs APC (Adenomatous Polyposis Coli) is affected in most cases, high grade MSI (MSI-H) CRCs frequently display mutations in various genes, like the APC-, AXIN2- or CTNNBI (beta-CATENIN) gene itself.
These results suggest that the AXIN2Pro50Ser SNP is associated with development of lung cancer as a protective SNP, while an association between the AXIN2 SNP and risk of colorectal cancer and of head and neck cancer was not observed.
AXIN2 and MUTYH genes were screened for germline mutations by PCR and direct sequencing in 39 unrelated patients with multiple adenomas or colorectal cancer without evidence of APC mutation nor mismatch repair defect.
We have previously isolated the human homolog (AXIN2) of the murine conductin gene and shown that it is mutated in colorectal cancer (CRC) with defective mismatch repair (MMR).