Flow Cytometric analysis of Th1 and Th2 cytokines in PBMCs as a parameter of immunological dysfunction in patients of Superficial Transitional cell carcinoma of bladder

Springer Science and Business Media LLC - Tập 55 - Trang 734-743 - 2005
A. Agarwal1, S. Verma1, U. Burra1, N. S. Murthy1, N. K. Mohanty2, S. Saxena1
1Institute of Pathology, ICMR, Safdarjung Hospital Campus, New Delhi, India
2Department of Urology, Safdarjung Hospital Campus, New Delhi, India

Tóm tắt

Transitional cell carcinoma (TCC) is the commonest cancer of the bladder. Although majority of TCC can be diagnosed at an early stage and removed easily by transurethral resection of tumor (TURT), the management of this carcinoma is complicated due to frequent recurrences usually within 6 months to one-year period. An imbalance between the Th1 and Th2 immune responses has been attributed to immune dysregulation in various malignancies. The present study aims to evaluate the Th1 and Th2 balance in Peripheral Blood Mononuclear Cells of 41 TCC patients (20 recurrent and 21 non-recurrent) using flow cytometry. It also further assesses immunological and cellular factors influencing the anti-neoplastic activity of the TCC patients and in 21 normal healthy subjects in terms of their cytokine expression and various cell surface markers. The findings of the study revealed that the cell surface markers CD3+, CD4+ and CD8+ along with NK cells were found to be significantly lower in patients than healthy controls (p<0.01). The mean percent expression of CD4+ was significantly lower in patients showing recurrence (23.9±9.84) as compared to patients with non-recurrence (31.1±12.27). The percentage of CD4+T-cells (mean±SD) producing IFN-γ, IL-2 and TNF-α were statistically significantly reduced in patients (19.1±4.94, 52.3±20.86 and 12.8±4.49) as compared to healthy controls (23.3±3.67, 67.5±12.0 and 17.6±5.96 respectively), (p<0.01, 0.018, 0.001). On the contrary, the mean levels of IL-4, IL-6 and IL-10 in patients (63.8±17.01, 60.4±14.79 and 65.7±14.84 respectively) were significantly higher as compared to healthy controls (24.4±8.77, 26.5±5.28 and 20.6±3.81 respectively), (p<0.001). No statistically significant difference was observed in the cytokine expression between patients showing recurrence and non-recurrence. Patients with bladder cancer seem to develop a Th2 dominant status with a deficient type1 immune response. The lymphocyte evaluation along with cytokine measurement can provide a sensitive and valuable tool for evaluating the function of cell-mediated immunity in these patients and can also find application in therapeutic monitoring of bladder cancer patients as new targets for immunotherapy.

Tài liệu tham khảo

Erard F, Wild MT, Garcia-Sanz JA, Le Gros G (1993) Switch of CD8 T cells to noncytolytic CD8-CD4-cells that make TH2 cytokines and help B cells. Science 260:1802–5

Kavanaugh DY, Carbone DP (1996) Immunologic dysfunction in cancer. Hematol Oncol Clin North Am 10:927–51

Klein LT, Miller MI, Ikeguchi E, Buttyan R, Connor JP, Katz A, Raffo AJ and Olsson C (1996) Anti-fas antibody mediated apoptosis in bladder tumor cells: a potential intravesical therapeutic agent. Proc Annu Meet Amer Assoc cancer Res 37:A103

Old LJ (1987) Tumour necrosis factor. Polypeptide mediator network. Nature 326:330–1

Pyrah LN, Raper FP, Thomas, GM (1964) Report of a follow-up of papillary tumours of the bladder. Br J Urol 36:14–25