title: Peritherapeutic Serum p53 Antibody Titers are Predictors of Survival in Patients with Esophageal Squamous Cell Carcinoma Undergoing Neoadjuvant Chemotherapy and Surgery.
abstract: Although the preoperative serum level of p53 antibodies (s-p53-Abs) is reported to be a prognostic factor in esophageal squamous cell carcinoma (ESCC) patients, the clinical significance of post-therapeutic s-p53-Abs or the peritherapeutic changes in s-p53-Abs associated with the prognosis or treatment response of ESCC patients undergoing surgery following preoperative chemotherapy remains unclear.
  
  
  
  s-p53-Abs titers were peritherapeutically measured in 136 ESCC patients who underwent surgery following preoperative chemotherapy in our department from 2008 to 2014. Clinicopathological parameters, including the response to chemotherapy and the recurrence-free survival (RFS), were compared between groups classified by the levels of the s-p53-Ab titers and the peritherapeutic changes in the s-p53-Ab titers.
  
  
  
  After curative surgery following preoperative chemotherapy, the s-p53-Ab titers increased in 15 patients (11.0%), remained unchanged in 81 patients (59.6%) and decreased in 40 patients (29.4%). The seropositive rate (cutoff value: 0.5 U/ml) of pre- and post-therapeutic s-p53-Abs were 36.0% (49/136) and 35.3% (48/136), respectively. Negative and positive seroconversion of s-p53-Abs was identified in 20.4% (10/49) and 10.3% (9/105) of patients, respectively. Both pre- and post-therapeutic seropositive s-p53-Ab titers significantly correlated with an unfavorable prognosis (p = 0.028, 0.002, respectively). Patients with a peritherapeutic increase in s-p53-Ab titers showed a shorter RFS compared with unchanged/decreased titers. Neither the s-p53-Ab titer at any time point nor its change was associated with the response to chemotherapy.
  
  
  
  Both peritherapeutic s-p53-Ab titers and their changes were shown to be prognostic parameters in ESCC patients undergoing preoperative chemotherapy followed by surgery.
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita City, Osaka, 565-0871, Japan.
authors.forename: Kotaro
authors.initials: K
authors.lastname: Yamashita
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita City, Osaka, 565-0871, Japan. tmakino@gesurg.med.osaka-u.ac.jp.
authors.forename: Tomoki
authors.initials: T
authors.lastname: Makino
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita City, Osaka, 565-0871, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Tanaka
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita City, Osaka, 565-0871, Japan.
authors.forename: Makoto
authors.initials: M
authors.lastname: Yamasaki
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita City, Osaka, 565-0871, Japan.
authors.forename: Masaaki
authors.initials: M
authors.lastname: Yamamoto
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita City, Osaka, 565-0871, Japan.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Miyazaki
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita City, Osaka, 565-0871, Japan.
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Takahashi
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita City, Osaka, 565-0871, Japan.
authors.forename: Yukinori
authors.initials: Y
authors.lastname: Kurokawa
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita City, Osaka, 565-0871, Japan.
authors.forename: Kiyokazu
authors.initials: K
authors.lastname: Nakajima
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita City, Osaka, 565-0871, Japan.
authors.forename: Shuji
authors.initials: S
authors.lastname: Takiguchi
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita City, Osaka, 565-0871, Japan.
authors.forename: Masaki
authors.initials: M
authors.lastname: Mori
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita City, Osaka, 565-0871, Japan.
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Doki
mesh_terms: D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000097:blood / Q000401:mortality* / Q000628:therapy; D003131:Combined Modality Therapy; D004938:Esophageal Neoplasms / Q000097:blood / Q000401:mortality* / Q000628:therapy; D000077277:Esophageal Squamous Cell Carcinoma; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D020360:Neoadjuvant Therapy; D011379:Prognosis; D016159:Tumor Suppressor Protein p53 / Q000097:blood*
chemical_list: D016159:Tumor Suppressor Protein p53