Open Access

Plasma level of prostate related‑antigen peptide‑reactive IgG is a prognostic factor of patients with breast cancer treated with personalized peptide vaccines

  • Authors:
    • Shuko Saku
    • Uhi Toh
    • Yuko Takao
    • Sayaka Sakurai
    • Akira Yamada
    • Shigeki Shichijo
    • Kyogo Itoh
    • Yoshito Akagi
  • View Affiliations

  • Published online on: June 25, 2021     https://doi.org/10.3892/etm.2021.10337
  • Article Number: 905
  • Copyright: © Saku et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

Metrics: Total Views: 0 (Spandidos Publications: | PMC Statistics: )
Total PDF Downloads: 0 (Spandidos Publications: | PMC Statistics: )


Abstract

The present study assessed plasma IgG in patients with metastatic recurrent breast cancer (mrBC) that is reactive to various T‑cell epitope peptides of prostate‑related antigens (PRAs), such as prostate‑specific antigen, prostate‑specific membrane antigen and prostate acid phosphatase. Patients were treated with personalized peptide vaccines (PPVs) which were selected and administered from a panel of candidate peptides based on human leukocyte antigen‑types and prevaccination IgG levels to each peptide. The peptide panel consisted of 27 cytotoxic T‑lymphocyte‑epitope peptides derived from tumor‑associated antigens, not including PRA. PRA peptides and peptide panels were retrospectively analyzed in 77 PPV‑treated patients. The results revealed that PRA reactive IgG levels were increased after vaccination in 31 of the 97 patients included in the present study. Although there was no significant association between anti‑PRA peptide levels and progression‑free survival (PFS) or overall survival, anti‑PRA peptide levels were significantly associated with PFS (P=0.009) in estrogen‑receptor positive (ER+) patients with cancer. The results suggested that plasma anti‑PRA IgG levels may be a useful prognostic marker for monitoring PPVs, particularly for ER+ patients with mrBC (trial registration no. from the UMIN Clinical Trials Registry, UMIN000001844).
View Figures
View References

Related Articles

Journal Cover

August-2021
Volume 22 Issue 2

Print ISSN: 1792-0981
Online ISSN:1792-1015

Sign up for eToc alerts

Recommend to Library

Copy and paste a formatted citation
x
Spandidos Publications style
Saku S, Toh U, Takao Y, Sakurai S, Yamada A, Shichijo S, Itoh K and Akagi Y: Plasma level of prostate related‑antigen peptide‑reactive IgG is a prognostic factor of patients with breast cancer treated with personalized peptide vaccines. Exp Ther Med 22: 905, 2021
APA
Saku, S., Toh, U., Takao, Y., Sakurai, S., Yamada, A., Shichijo, S. ... Akagi, Y. (2021). Plasma level of prostate related‑antigen peptide‑reactive IgG is a prognostic factor of patients with breast cancer treated with personalized peptide vaccines. Experimental and Therapeutic Medicine, 22, 905. https://doi.org/10.3892/etm.2021.10337
MLA
Saku, S., Toh, U., Takao, Y., Sakurai, S., Yamada, A., Shichijo, S., Itoh, K., Akagi, Y."Plasma level of prostate related‑antigen peptide‑reactive IgG is a prognostic factor of patients with breast cancer treated with personalized peptide vaccines". Experimental and Therapeutic Medicine 22.2 (2021): 905.
Chicago
Saku, S., Toh, U., Takao, Y., Sakurai, S., Yamada, A., Shichijo, S., Itoh, K., Akagi, Y."Plasma level of prostate related‑antigen peptide‑reactive IgG is a prognostic factor of patients with breast cancer treated with personalized peptide vaccines". Experimental and Therapeutic Medicine 22, no. 2 (2021): 905. https://doi.org/10.3892/etm.2021.10337