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Kitamura, H. et al.

Kitamura, Torigoe, Honma, Asanuma, Nakazawa, Shimozawa, Hirohashi, Sato, Sato, Tsukamoto,

Expression and antigenicity of survivin, an inhibitor of apoptosis family member, in bladder cancer: implications for specific immunotherapy.

OBJECTIVES: To assess the expression of survivin in transitional cell carcinoma of the bladder and to study whether survivin is a transitional cell carcinoma-specific antigen that could be a target for immunotherapy. Survivin, an inhibitor of apoptosis family member, has been reported to be expressed in various cancers but not in normal adult tissues. METHODS: Immunohistochemical staining for survivin and human leukocyte antigen (HLA) class I was performed on specimens from 88 patients who underwent transurethral resection and radical cystectomy. To determine whether survivin was recognized as a tumor antigen by the host immune system, we assessed anti-survivin antibodies in the sera of 52 patients and 18 healthy volunteers with an enzyme-linked immunosorbent assay using recombinant survivin. RESULTS: Survivin and HLA class I were expressed in 77 (87.5%) and 59 (67.0%) of the 88 bladder cancer specimens, respectively, and 56 (63.6%) expressed both survivin and HLA class I. The absorbance values of anti-survivin antibodies in patients with bladder cancer were significantly greater than those in the healthy volunteers. A relationship was found between the level of serum anti-survivin antibodies and the staining intensity of survivin in the specimen. CONCLUSIONS: Survivin is expressed in carcinoma of the bladder with high sensitivity. It is suggested that survivin is presented on HLA class I molecules of antigen-presenting cells in 64% of patients with bladder cancer. Therapeutic targeting of survivin in bladder cancer is a future possibility.[1]

References

Expression and antigenicity of survivin, an inhibitor of apoptosis family member, in bladder cancer: implications for specific immunotherapy. Kitamura, H., Torigoe, T., Honma, I., Asanuma, H., Nakazawa, E., Shimozawa, K., Hirohashi, Y., Sato, E., Sato, N., Tsukamoto, T. Urology (2006) [Pubmed]

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