| First Author | Gapin L | Year | 1999 |
| Journal | J Immunol | Volume | 163 |
| Issue | 8 | Pages | 4100-4 |
| PubMed ID | 10510343 | Mgi Jnum | J:111019 |
| Mgi Id | MGI:3652629 | Doi | 10.4049/jimmunol.163.8.4100 |
| Citation | Gapin L, et al. (1999) Cutting edge: TCR alpha beta+ CD8 alpha alpha+ T cells are found in intestinal intraepithelial lymphocytes of mice that lack classical MHC class I molecules. J Immunol 163(8):4100-4 |
| abstractText | TCR alpha beta+ intestinal intraepithelial lymphocytes (IEL) can express either the typical CD8 alpha beta heterodimer or an unusual CD8 alpha alpha homodimer. Both types of CD8+ IEL require class I molecules for their differentiation, since they are absent in beta2m-/- mice. To gain insight into the role of class I molecules in forming TCR alpha beta+ CD8+ IEL populations, we have analyzed the IEL in mice deficient for either TAP, beta 2m, CD1, or K and D. We find that K-/-D-/- mice have TCR alpha beta+ CD8 alpha alpha+ IEL, although they are deficient for TCR alpha beta+ CD8 alpha beta+ cells. This indicates that at least some TCR alpha beta+ CD8 alpha alpha+ IEL require only nonclassical class I molecules for their development. Surprisingly, the TCR alpha beta+ CD8 alpha alpha+ IEL are significantly increased in K-/-D-/- mice, suggesting a complex interaction between CD8+ IEL and class I molecules that might include direct or indirect negative regulation by K and D, as well as positive effects mediated by nonclassical class I molecules. |
