title: Identification of the full-length β-actin sequence and expression profiles in the tree shrew (Tupaia belangeri).
abstract: The tree shrew (Tupaia belangeri) diverges from the primate order (Primates) and is classified as a separate taxonomic group of mammals - Scandentia. It has been suggested that the tree shrew can be used as an animal model for studying human diseases; however, the genomic sequence of the tree shrew is largely unidentified. In the present study, we reported the full-length cDNA sequence of the housekeeping gene, β-actin, in the tree shrew. The amino acid sequence of β-actin in the tree shrew was compared to that of humans and other species; a simple phylogenetic relationship was discovered. Quantitative polymerase chain reaction (qPCR) and western blot analysis further demonstrated that the expression profiles of β-actin, as a general conservative housekeeping gene, in the tree shrew were similar to those in humans, although the expression levels varied among different types of tissue in the tree shrew. Our data provide evidence that the tree shrew has a close phylogenetic association with humans. These findings further enhance the potential that the tree shrew, as a species, may be used as an animal model for studying human disorders.
authors.affiliation: Department of Microbiology and Immunology, Guangxi University of Chinese Medicine, Nanning, Guangxi 530001, P.R. China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: Department of Microbiology and Immunology, Guangxi University of Chinese Medicine, Nanning, Guangxi 530001, P.R. China.
authors.forename: Chenxia
authors.initials: C
authors.lastname: Yun
authors.affiliation: Department of Immunology, Guangxi Medical University, Nanning, Guangxi 530021, P.R. China.
authors.forename: Qihui
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, MD 21201, USA.
authors.forename: Wanli W
authors.initials: WW
authors.lastname: Smith
authors.affiliation: Department of Microbiology and Immunology, Guangxi University of Chinese Medicine, Nanning, Guangxi 530001, P.R. China.
authors.forename: Jing
authors.initials: J
authors.lastname: Leng
mesh_terms: D000199:Actins / Q000096:biosynthesis / Q000235:genetics; D000818:Animals; D001483:Base Sequence; D018076:DNA, Complementary / Q000235:genetics*; D005786:Gene Expression Regulation / Q000502:physiology*; D006801:Humans; D008969:Molecular Sequence Data; D010802:Phylogeny; D014418:Tupaiidae / Q000235:genetics / Q000378:metabolism
chemical_list: D000199:Actins; D018076:DNA, Complementary