Designing and Maintaining the Mature TCR Repertoire

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Designing and Maintaining the Mature TCR Repertoire Christophe Viret, F.Susan Wong, Charles A Janeway  Immunity  Volume 10, Issue 5, Pages 559-568 (May 1999) DOI: 10.1016/S1074-7613(00)80055-2

Figure 1 Differential Persistence of Adoptively Transferred Purified 1H3.1 TCR Tg CD4+ T Cells in Secondary Lymphoid Organs of Thymectomized-Irradiated Wild-Type and Mutant Recipient Mice (A) An example of FACS analysis of a Vβ6 staining performed on ammonium chloride–treated spleen cell suspensions 5 days after intravenous injection of 6 × 106 Tg CD4+ T cells. The bottom histogram shows splenocytes from a noninjected control mouse. (B) Maintenance of mature naive Tg CD4+ T cells requires the surface expression of the restricting MHC class II molecules. Plots represent the percentage of recovered Vβ6+ cells from spleen as shown in (A). Similar results were obtained with lymph node–derived cells. Experiments where the various recipient mice were concomitantly analyzed are shown. Consistent data were obtained when mutant mice were tested independently together with normal B6 mice. Representative absolute numbers of recovered Vβ6+ splenocytes in B6, I-Abβ−/−, β2m−/−, and BALB/c mice were, respectively, 0.3–0.4 × 106 at day 3 for all recipients, 0.64 × 106, 0.08 × 106, 0.67 × 106, and 0.02 × 106 at day 5, and 2.1 × 106, 0.09 × 106, 2.35 × 106, and 0.03 × 106 at day 8. (C) Transgenic T cells recovered from the spleen of a thymectomized-irradiated B6 recipient at day 10 post transfer retain the ability to react specifically to the cognate peptide in vitro. Lymph node cells from recipients were stimulated in the presence of irradiated B6 APCs and 5 μg/ml Eα52-68 (Ea). The Y-A e and 25.9.17 mAbs were used at 1 μg/ml. Data are representative of two experiments. Immunity 1999 10, 559-568DOI: (10.1016/S1074-7613(00)80055-2)

Figure 2 MHC Class II Molecule-Dependent Division of 1H3.1 TCR Tg CD4+ T Cells in Secondary Lymphoid Organs of Irradiated Syngeneic Recipient Mice (A) CFSE-labeled 1H3.1 TCR Tg CD4+ T cells undergo cell division after transfer into normal syngeneic mice (B6) but virtually none when injected into mice lacking expression of I-Ab molecules (I-Abβ−/−). Cell suspensions were prepared from the spleen and lymph nodes of recipients at day 9 after adoptive transfer and analyzed by cytofluorometry. (B) Cytofluorometric analysis of cells recovered from the spleen of B6 (H-2b), BALB/c (H-2d), and CB10.H-2b (BALB.B10) mice at different time points after adoptive transfer of CFSE-labeled 1H3.1 TCR Tg CD4+ T cells. (C) Cytofluorometric analysis of cells recovered from the spleen of normal B6 and MHC class II–deficient (I-Abβ−/−) mice at various time points after transfer of CFSE-labeled 1H3.1 TCR Tg CD4+ RAG-1−/− T cells. Comparable profiles were observed for lymph node cells. Immunity 1999 10, 559-568DOI: (10.1016/S1074-7613(00)80055-2)

Figure 3 Moderate Cell Division of 1H3.1 TCR Tg CD4+ T Cells after Adoptive Transfer into Irradiated Normal Syngeneic (B6) Recipient Mice CFSE-labeled 1H3.1 TCR Tg CD4+ T cells divide rapidly in irradiated recipient mice expressing the I-Ab:Eα52-68 complex at a low level on all APCs (I-Ab-Ep mice). Cell suspensions were prepared from the spleen of B6 and I-Ab-Ep recipients at day 3, 6, and 9 after adoptive transfer, ammonium chloride treated, and analyzed by cytofluorometry. Note the clear multimodal distribution observed at day 3 post transfer in the I-Ab-Ep recipient. Immunity 1999 10, 559-568DOI: (10.1016/S1074-7613(00)80055-2)

Figure 4 Deficient Positive Selection of the 1H3.1 Specificity in the H-2Mα−/− Thymic Microenvironment and Impaired Persistence of Mature 1H3.1 Tg T Cells upon Transfer to H-2Mα−/− Recipients (A) FACS analysis of thymic cell suspensions prepared from 6- to 7-week-old 1H3.1 TCR Tg H-2Mα+/− and H-2Mα−/− littermate mice. The analysis of an 8-week-old 1H3.1 TCR Tg Ii−/− thymus is shown as a nonselecting situation for comparison. The central panels show the Vβ6 histogram. The left and right panels show the CD4/CD8 distribution, respectively, without and with electronic gating on the Vβ6high thymocyte population. Quadrant statistics are indicated. In the experiment depicted, the cellularity was: TCR Tg H-2Mα+/−, 146 × 106; TCR Tg H-2Mα−/−, 186.7 × 106; and TCR Tg Ii−/−, 124.5 × 106. (B) FACS analysis of lymph node cell suspensions. The right panels indicate the CD4/CD8 distribution after electronic gating on the Vβ6+ cells. Thymic and lymph node profiles are representative of three mice analyzed. (C) Deficient persistence of the adoptively transferred mature 1H3.1 TCR Tg CD4+ T cells into irradiated H-2Mα−/− recipients. Plots represent the fraction of Vβ6+ cells recovered from secondary lymphoid organs of B6 and H-2Mα−/− recipient mice after immunostaining and FACS analysis of cell suspensions at different time points after adoptive transfer. The fraction of Vβ6+ cells in a noninjected irradiated B6 control mouse was 2.7% at day 9 (data not shown). The data are representative of three experiments. Left, splenocytes analysis; right, pooled lymph node cells analysis. Representative absolute numbers of CD4+Vβ6+ splenocytes at day 2, 4, and 8 were, respectively, 0.11 × 106, 0.42 × 106, and 1.28 × 106 for B6 recipients and 0.16 × 106, 0.04 × 106, and 0.08 × 106 for H-2Mα−/− recipients. Immunity 1999 10, 559-568DOI: (10.1016/S1074-7613(00)80055-2)

Figure 5 The Impaired Persistence of Adoptively Transferred 1H3.1 TCR Tg CD4+ T Cells into the H-2Mα−/− Recipients Correlates with the Absence of Cell Division Cell suspensions were prepared from the spleen and lymph nodes of normal B6, MHC class II–deficient (I-Abb−/−), and H-2Mα−/− recipients at day 9 after adoptive transfer of CFSE-labeled cells and analyzed by cytofluorometry. Immunity 1999 10, 559-568DOI: (10.1016/S1074-7613(00)80055-2)

Figure 6 Differential Evolution of Mature CD4+ T Cells from H-2Mα−/− Mice after Transfer into B6, H-2Mα−/−, and I-Abb−/− Mice CFSE-labeled H-2Mα−/− CD4+ T cells (5 × 106) were intravenously injected into irradiated recipients, and secondary lymphoid organs were analyzed at day 4 and 7 by flow cytometry. Histograms were plotted after electronic gating on CD4+ T cells. The cell numbers ([cellularity × % CFSE+ cells]/100) were, at day 4 and 7, respectively, 0.06 × 106 and 0.14 × 106 for the H-2Mα−/− recipients, 0.02 × 106 and 0.022 × 106 for the I-Abβ−/− recipients, and 0.36 × 106 and 0.35 × 106 for the B6 recipients. In the latter case, cell numbers are underestimated since many dividing cells reached the background fluorescence level. Immunity 1999 10, 559-568DOI: (10.1016/S1074-7613(00)80055-2)

Figure 7 Impaired Maintenance of Adoptively Transferred Mature Polyclonal CD4+ (but Not CD8+) T Cells from Normal B6.PL (Thy-1.1+) Mice into Irradiated H-2Mα−/− Recipient Mice (Thy-1.2+) (A) At different time points after transfer, cell suspensions from lymph nodes and/or spleen were prepared, enumerated, and triple-stained for CD4, CD8, and Thy-1.2 expression. The absolute number of recovered CD4+Thy-1.2− T cells (i.e., Thy-1.1+) was calculated using the formula ([% CD4+/Thy-1.2− T cells] × cellularity)/100. In the experiment depicted, ammonium chloride–treated splenocytes were analyzed after adoptive transfer of 12 × 106 cells/mouse (n = 2 at day 8). When simultaneously analyzed, irradiated, noninjected control mice showed no detectable CD4+/Thy-1.2− T cells. (B) Cytofluorometric analysis of cells recovered from the spleen of B6 and H-2Mα−/− recipient mice 8 days after adoptive transfer of CFSE-labeled CD4+Thy-1.1+ T cells. (C) Purified CD4+ or CD8+ T cells from spleen and lymph nodes of normal B6.PL mice were adoptively transferred into irradiated B6 and H-2Mα−/− mice (10 × 106 cells/mouse). Cell suspensions were prepared from spleen and lymph nodes 8 days after transfer, enumerated, triple stained, and analyzed by cytofluorometry. The number of recovered cells was calculated as indicated above for both CD4+ (left histograms) or CD8+ (right histograms) T cells. The values represent the mean of two mice. For each single mouse, the calculation was the summation of recovered cells from spleen and lymph nodes. Immunity 1999 10, 559-568DOI: (10.1016/S1074-7613(00)80055-2)