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  • Title: Decline of T cell-related immune functions in cancer patients and an attempt to restore them through infusion of activated autologous T cells.
    Author: Hirokawa K, Utsuyama M, Ishikawa T, Kikuchi Y, Kitagawa M, Fujii Y, Nariuchi H, Uetake H, Sugihara K.
    Journal: Mech Ageing Dev; 2009; 130(1-2):86-91. PubMed ID: 18555517.
    Abstract:
    We developed a scoring system that can combine several immunological parameters and express the immune status of individuals as a simple numeral. T cell immune score was obtained by using 5T cell-related parameters: number of T cells, ratio of CD4(+)T cells to CD8(+)T cells, number of naïve T cells, ratio of naïve T cells to memory T cells, and T cell proliferative index (TCPI). TCPI was calculated by using number of T cells and their proliferative activity. We assessed T cell immune score in 103 patients with colorectal cancer and 51 healthy age-matched controls. The results were as follows: (1) T cell-immune score of patients in stages I-IV before surgery was significantly decreased as compared with controls. (2) The number of regulatory T cells in patients in stages I-IV gradually increased with disease progression. (3) T cell immune score was strongly suppressed after surgery, but were recovered to the initial level within a month. (4) Furthermore, restoration of immunological function was attempted in cancer patients by infusion of activated autologous T cells. The effectiveness was confirmed by an increase of TCPI in many cancer patients.
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