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Clinical Trial
. 2004 Dec 15;173(12):7125-30.
doi: 10.4049/jimmunol.173.12.7125.

Cutting edge: persistence of transferred lymphocyte clonotypes correlates with cancer regression in patients receiving cell transfer therapy

Affiliations
Clinical Trial

Cutting edge: persistence of transferred lymphocyte clonotypes correlates with cancer regression in patients receiving cell transfer therapy

Paul F Robbins et al. J Immunol. .

Abstract

The lack of persistence of transferred autologous mature lymphocytes in humans has been a major limitation to the application of effective cell transfer therapies. The results of a pilot clinical trial in 13 patients with metastatic melanoma suggested that conditioning with nonmyeloablative chemotherapy before adoptive transfer of activated tumor-reactive T cells enhances tumor regression and increases the overall rates of objective clinical responses VSports手机版. The present report examines the relationship between T cell persistence and tumor regression through analysis of the TCR beta-chain V region gene products expressed in samples obtained from 25 patients treated with this protocol. Sequence analysis demonstrated that there was a significant correlation between tumor regression and the degree of persistence in peripheral blood of adoptively transferred T cell clones, suggesting that inadequate T cell persistence may represent a major factor limiting responses to adoptive immunotherapy. .

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Figures (V体育平台登录)

FIGURE 1
FIGURE 1
Comparison of TRBV sequencing results with FACS analysis. The percentages of individual rearranged TRBV sequences obtained using 5′ RACE analysis were compared with the results of FACS analysis conducted with specific TRBV Abs. Samples were only analyzed if the appropriate TRBV Ab was available, and TRBV products that were represented at levels below 5% as determined either by TRBV sequence analysis or by Ab staining were excluded from the analysis. The results obtained using these methods were highly correlated using linear regression analysis (R = 0.8975, p < 0.001).
FIGURE 2
FIGURE 2
Comparisons of the persistence of individual T cell clonotypes in responders and nonresponders. The percentages of all persistent T cell clonotypes that were detected in samples of PBMC obtained between 23 and 63 days following adoptive transfer, as determined using TRBV sequence analysis, were plotted for the responding and nonresponding patients. Each point represents a distinct T cell clonotype that was identified in an individual patient sample.

References

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