Expression and Localization of TRK-Fused Gene Products in the Rat Brain and Retina

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概要

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• The TRK-fused gene (TFG in human, Tfg in rat) was originally identified in human papillary thyroid cancer as a chimeric form of the NTRK1 gene. It has been reported that the gene product (TFG) plays a role in regulating phosphotyrosine-specific phosphatase-1 activity. However, no information regarding the localization of Tfg in rat tissues is available. In this study, we investigated the expression of Tfg mRNA in normal rat tissues using reverse transcription-polymerase chain reaction (RT-PCR). We also produced an antibody against Tfg gene products and examined the localization of TFG in the rat brain and retina. The RT-PCR experiments demonstrated that two types of Tfg mRNA were expressed in rat tissues: the conventional form of Tfg (cTfg) and a novel variant form, retinal Tfg (rTfg). RT-PCR analyses demonstrated that cTfg was ubiquitously expressed in rat tissues, while rTfg was predominantly expressed in the brain and retina. Western blot analysis demonstrated two bands with molecular weights of about 30 kDa and 50 kDa in the rat brain. Immunohistochemistry indicated that TFG proteins were predominantly expressed by neurons in the brain. In the rat retina, intense TFG-immunoreactivity was detected in the layer of rods and cones and the outer plexiform layer.

著者

• Tooyama Ikuo

  Molecular Neuroscience Research Center Shiga University Of Medical Science

• Masuda Chiaki

  Molecular Neuroscience Research Center Shiga University Of Medical Science

• Fukui Kenji

  Department Of Chemistry Faculty Of Science Hiroshima University

• Kimura Hiroshi

  Molecular Neurobiology Research Center Shiga University Of Medical Science

• Makino Satoshi

  Molecular Neuroscience Research Center, Shiga University of Medical Science

• Fukui Kenji

  Department of Psychology, Kyoto Prefectural University of Medicine

• Maebayashi Hisae

  Molecular Neuroscience Research Center, Shiga University of Medical Science

• Takeuchi Shigako

  Molecular Neuroscience Research Center, Shiga University of Medical Science

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