| First Author | Sato K | Year | 2006 |
| Journal | Mol Immunol | Volume | 43 |
| Issue | 9 | Pages | 1443-53 |
| PubMed ID | 16144709 | Mgi Jnum | J:108119 |
| Mgi Id | MGI:3623056 | Doi | 10.1016/j.molimm.2005.07.035 |
| Citation | Sato K, et al. (2006) Selective expression of vacuolar H+-ATPase subunit d2 by particular subsets of dendritic cells among leukocytes. Mol Immunol 43(9):1443-53 |
| abstractText | Dendritic cells (DC) are far more potent to activate T cells than other antigen presenting cells (e.g., macrophages) and distributed to many organs where DC develop to functionally and phenotypically distinctive subsets. To isolate DC-differentially expressed genes, we used a subtractive cDNA cloning (XS52 DC minus J774 macrophages), resulting in the identification of d2 isoform of vacuolar (V) H+-ATPase subunit d. Unlike the ubiquitously expressed isoform (d1), d2 mRNA manifested expression restricted to particular subsets of DC (e.g., skin- and bone marrow-derived DC) among leukocytes and encoded two transcripts (1.6 and 3.0 kb) that differed in the length of the 3'-untranslated region. The d2 protein displayed association with membranes and the localization in lysosomes and antigen-containing endosomes. Interestingly, XS52 DC expressed seven-fold higher V-ATPase proton-pump activity than J774 macrophages and distinguished from the macrophage by high levels of isoforms a1 and a2 expression among V-ATPase subunits. These results indicated that d2 is a new marker for DC and it may, co-operatively with subunit a isoforms, regulate V-ATPase activity. |
