In Vivo Identification of Novel Tgif2lx Target Genes in Colorectal Adenocarcinoma Using the Cdna-Aflp Method Publisher Pubmed



Mobini GR^{1, 2} ; Ghafari A³ ; Amanpour S⁴ ; Fateh R⁵ ; Ghahremani MH^{2, 6} ; Muhammadnejad S^{3, 7} ; Dehpour AR^{8, 9} ; Akbari A¹⁰ ; Hoseiniharouni SM² ; Kazemirad E¹¹ ; Bolhassani M¹² ; Heidari M³
Source: Arab Journal of Gastroenterology Published:2018

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. © 2018 Pan-Arab Association of Gastroenterology