Originally published as JHC exPRESS on August 17, 2009.
doi:10.1369/jhc.2009.953976
Journal of Histochemistry and Cytochemistry
Volume 57 (12): 1121-1126, 2009
Copyright © 2009 Author et al.
The mRNA Distribution of C7orf24, a
-Glutamyl Cyclotransferase, in Rat Tissues
Keisuke Oda,
Satoshi Makino,
Chiaki Masuda,
Tatsuhiro Yoshiki,
Yoshihisa Kitamura,
Kazuyuki Takata,
Daijiro Yanagisawa,
Takashi Taniguchi and
Ikuo Tooyama
Molecular Neuroscience Research Center (KO,SM,CM,IT) and Department of Urology (TY), Shiga University of Medical Science, Otsu, Japan, and Department of Neurobiology, Kyoto Pharmaceutical University, Kyoto, Japan (YK,KT,DY,TT)
Correspondence to: Ikuo Tooyama, Professor, Molecular Neuroscience Research Center, Shiga University of Medical Science, Setatsukinowa-cho, Otsu 520-2192, Japan. E-mail: kinchan{at}belle.shiga-med.ac.jp
The putative protein C7orf24 is encoded by Homo sapiens chromosome 7 open reading frame 24. C7orf24 was first identified as a 21-kDa cytochrome c–releasing factor detected in the cytosolic fraction of human leukemia U937 cells after treatment with geranylgeraniol. C7orf24 protein was recently identified as a
-glutamyl cyclotransferase, an enzyme in the
-glutamyl cycle. However, the exact localization of C7orf24 mRNA in normal tissues remains unknown. The present study examined the distribution pattern of C7orf24 mRNA in rat tissues using reverse transcription-polymerase chain reaction (RT-PCR) and in situ hybridization histochemistry. The RT-PCR experiments demonstrated that C7orf24 and a variant C7orf24 mRNA were expressed in various tissues. Quantitative RT-PCR analysis revealed significantly high levels of both C7orf24 mRNAs in the liver and kidney, compared with other tissues examined. In situ hybridization histochemistry localized C7orf24 mRNA to hepatocytes in the liver and renal tubules in the kidney. The present results thus implicated an important role for C7orf24 in liver and kidney. This manuscript contains online supplemental material at http://www.jhc.org. Please visit this article online to view these materials. (J Histochem Cytochem 57:1121–1126, 2009)
Key Words: glutathione detoxification drug metabolism in situ hybridization

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