title: D-Tyr-tRNA(Tyr) deacylase, a new role in Alzheimer's-associated disease in SAMP8 mice.
abstract: OBJECTIVE
  To assess the expression level of D-Tyr-tRNA(Tyr) deacylase (DTD) in SAMP8 mice and speculate the function of DTD in disorders associated with Alzheimer's disease (AD).
  
  
  METHODS
  Altogether 12 SAMP8 mice and 12 SAMR1 mice were used in this study. Semi-quantitative reverse transcription-polymerase chain reaction (RT-PCR) and Western blot were performed to detect the mRNA and protein levels of DTD in the mice. Purified DTD protein was injected into lateral ventricle to investigate the function of DTD in SAMP mice. The behavior of the mice was tested by using a Step-through Test System.
  
  
  RESULTS
  Both mRNA and protein levels of DTD were found to be significantly lower in SAMP8 mice compared with those in SAMR1 mice (P<0.05). In vivo injection of DTD protein did not lead to an obvious change in behavior of SAM mice.
  
  
  CONCLUSIONS
  DTD might function in the process of AD-associated pathology and could possibly participate in physiology process in a long-term manner to orchestrate with other regulators in order to maintain the balance of organism.
authors.affiliation: National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100005, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.forename: Chang
authors.initials: C
authors.lastname: Liu
authors.forename: Jing-xi
authors.initials: JX
authors.lastname: Zhu
authors.forename: Ai-hua
authors.initials: AH
authors.lastname: Li
authors.forename: Zhi-qiang
authors.initials: ZQ
authors.lastname: Zhao
authors.forename: Bin
authors.initials: B
authors.lastname: Yin
authors.forename: Xiao-zhong
authors.initials: XZ
authors.lastname: Peng
mesh_terms: D000544:Alzheimer Disease / Q000201:enzymology*; D019881:Aminoacyltransferases / Q000378:metabolism*; D000818:Animals; D001483:Base Sequence; D017931:DNA Primers; D004195:Disease Models, Animal; D051379:Mice; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D017931:DNA Primers; D019881:Aminoacyltransferases; C120167:D-tyrosine tRNA(Tyr) deacylase