| Title: | Cloning and functional characterization of a novel up-regulator, cartregulin, of carnitine transporter, OCTN2 |
| Authors: | Nagai, Kazuhiko Browse this author |
| Takikawa, Osamu Browse this author |
| Kawakami, Naoko Browse this author |
| Fukao, Mitsuhiro Browse this author |
| Soma, Takamitsu Browse this author |
| Oda, Atsushi Browse this author |
| Nishiya, Tadashi Browse this author |
| Hayashi, Misato Browse this author |
| Lu, Lingyun Browse this author |
| Nakano, Manabu Browse this author |
| Kajita, Emi Browse this author |
| Fujita, Hiroyoshi Browse this author |
| Miwa, Soichi Browse this author →KAKEN DB |
| Keywords: | cDNA cloning |
| Acetylcarnitine |
| Carnitine |
| OCTN2 |
| mRNA stabilization |
| Transporter |
| Up-regulation |
| Alzheimer’s disease |
| Issue Date: | 1-Aug-2006 |
| Publisher: | Elsevier Inc. |
| Journal Title: | Archives of Biochemistry and Biophysics |
| Volume: | 452 |
| Issue: | 1 |
| Start Page: | 29 |
| End Page: | 37 |
| Publisher DOI: | 10.1016/j.abb.2006.06.006 |
| PMID: | 16839516 |
| Abstract: | Acetylcarnitine exerts therapeutic effects on some neurological disorders including Alzheimer’s disease. OCTN2 is known as a transporter for acetylcarnitine, but its expression in the brain is very low. To examine a brain-specific transporter for acetylcarnitine, we screened a rat brain cDNA library by hybridization using a DNA probe conserved among an OCTN family. A cDNA homologous to OCTN2 cDNA was isolated. The cDNA encoded a novel 146-amino acid protein with one putative transmembrane domain. The mRNA was expressed not only in rat brain but also in some other tissues. The novel protein was localized in endoplasmic reticulum when expressed in COS-7 cells but exhibited no transport activity for acetylcarnitine. However, when co-expressed with OCTN2, it enhanced the OCTN2-mediated transport by about twofold. The enhancement was accompanied by an increase in the levels of mRNA and protein. When OCTN2 was expressed in Xenopus oocytes by injection of its cRNA, its transport activity was enhanced by co-expression of the novel protein. These data suggest that the novel protein increases OCTN2 by stabilizing the mRNA in endoplasmic reticulum. The protein may be an up-regulator of OCTN2 and is tentatively designated cartregulin. |
| Relation: | http://www.sciencedirect.com/science/journal/00039861 |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/14620 |
| Appears in Collections: | 医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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