In vivo identification of novel TGIF2LX target genes in colorectal adenocarcinoma using the cDNA-AFLP method

Publication date: Available online 28 June 2018

Source: Arab Journal of Gastroenterology

Author(s): Gholam Reza Mobini, Arefeh Ghafari, Saeid Amanpour, Roohollah Fateh, Mohammad Hossein Ghahremani, Samad Muhammadnejad, Ahmad Reza Dehpour, Abolfazl Akbari, Seyed Mojtaba Hoseiniharouni, Elham Kazemirad, Manzar Bolhassani, Mansour Heidari

Abstract

Background and study aims

Homeobox-containing genes are composed of a group of regulatory genes encoding transcription factors involved in the control of developmental processes. The homeodomain proteins could activate or repress the expression of downstream target genes. This study was conducted to in vivo identify the potential target gene(s) of TGIF2LX in colorectal adenocarcinoma.

Methods

A human colorectal adenocarcinoma cell line, SW48, was transfected with the recombinant pEGFPN1-TGIF2LX. The cells were injected subcutaneously into the flank of the three groups of 6-week-old female athymic C56BL/6 nude mice (n = 6 per group). The transcript profiles in the developed tumours were investigated using the cDNA amplified fragment length polymorphism (cDNA-AFLP) technique.

Results

The real-time RT-PCR and DNA sequencing data for the identified genes indicated that the N-terminal domain-interacting receptor 1 (Nir1) gene was suppressed whereas Nir2 and fragile histidine triad (FHIT) genes were upregulated followed by the overexpression of TGIF2LX gene.

Conclusion

Downregulation of Nir1 and upregulation of Nir2 and FHIT genes due to the overexpression of TGIF2LX suggests that the gene plays an important role as a suppressor in colorectal adenocarcinoma.

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