Preparation of anti-OPRT antibody for immunochemical detection

Kazuki Sakamoto, Yoshikazu Sugimoto, Kazutaka Miyadera, Toshinori Oka, Masakazu Fukushima

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Orotate phosphoribosyl transferase (OPRT, EC is a key enzyme in the anabolism of 5-fluorouracil (5 FU), and its expression in tumor is thought to increase the efficacy of 5-FU against the tumor. To detect the OPRT protein by immunoblotting and/or immunohistochemical methods, we tried to prepare highly specific antibody against the peptide including human OPRT amino acid sequence. The anti-OPRT polyclonal antibody obtained by immunization of OPRT peptides to rabbits had high specificity for the OPRT protein in human tumor xenografts in immunoblot and immunohistochemical analysis. Furthermore, there was a positive correlation between the activity and proteins of OPRT (R2=0.632) in 12 human tumors. These results suggest that immunohistochemical detection of tumoral OPRT protein expression using our anti-OPRT antibody may provide useful methods to predict the clinical response to 5-FU-based chemotherapy.

Original languageEnglish
Pages (from-to)653-658
Number of pages6
JournalGan to kagaku ryoho. Cancer & chemotherapy
Issue number5
Publication statusPublished - 2005 May
Externally publishedYes

ASJC Scopus subject areas

  • Oncology
  • Cancer Research


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