title: Construction and Quantitative Validation of Chicken CXCR4 Expression Reporter.
abstract: Site directional migration is an important biological event and an essential behavior for latent migratory cells. A migratory cell maintains its motility, survival, and proliferation abilities by a network of signaling pathways where CXCR4/SDF signaling route plays crucial role for directed homing of a polarized cell. The chicken embryo due to its specific vasculature modality has been used as a valuable model for organogenesis, migration, cancer, and metastasis. In this research, the regulatory regions of chicken CXCR4 gene have been characterized in a chicken hematopoietic lymphoblast cell line (MSB1). A region extending from -2000 bp upstream of CXCR4 gene to +68 after its transcriptional start site, in addition to two other mutant fragments were constructed and cloned in a promoter-less reporter vector. Promoter activity was analyzed by quantitative real-time RT-PCR and flow cytometry techniques. Our findings show that the full sequence from -2000 to +68 bp of CXCR4 regulatory region is required for maximum promoter functionality, while the mutant CXCR4 promoter fragments show a partial promoter activity. The chicken CXCR4 promoter validated in this study could be used for characterization of directed migratory cells in chicken development and disease models.
authors.affiliation: Division of Biotechnology, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.
authors.forename: Masoumeh
authors.initials: M
authors.lastname: Es-Haghi
authors.affiliation: Division of Biotechnology, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.
authors.forename: Mohammadreza
authors.initials: M
authors.lastname: Bassami
authors.affiliation: Division of Biotechnology, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran. dehghani@um.ac.ir.|Embryonic and Stem Cell Biology and Biotechnology Research Group, Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran. dehghani@um.ac.ir.
authors.forename: Hesam
authors.initials: H
authors.lastname: Dehghani
mesh_terms: D000818:Animals; D045744:Cell Line, Tumor; D002642:Chick Embryo; D002645:Chickens / Q000235:genetics*; D003001:Cloning, Molecular; D017930:Genes, Reporter; D011401:Promoter Regions, Genetic; D019718:Receptors, CXCR4 / Q000235:genetics* / Q000378:metabolism; D015203:Reproducibility of Results; D017422:Sequence Analysis, DNA
chemical_list: D019718:Receptors, CXCR4
keywords: Gallus gallus; Hematopoietic lymphoblast cell line (MSB1); Promoter of CXCR4 gene; Promoter validation
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