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01-03-2010 | Thoracic Oncology

p53 Mutation Status Predicts Pathological Response to Chemoradiotherapy in Locally Advanced Esophageal Cancer

Authors: Tomoki Makino, MD, Makoto Yamasaki, MD, Hiroshi Miyata, MD, Setsuko Yoshioka, MD, Shuji Takiguchi, MD, Yoshiyuki Fujiwara, MD, Kiyokazu Nakajima, MD, Toshirou Nishida, MD, Masaki Mori, MD, Yuichiro Doki, MD

Published in: Annals of Surgical Oncology | Issue 3/2010

Abstract

Background and Objectives

The p53 gene promotes cell-cycle arrest and apoptosis upon DNA damage and is associated with chemo- and radiosensitivity of cancer cells. However, its clinical significance has not been confirmed, especially in squamous cell carcinoma of the esophagus (ESCC). We investigated the correlation between p53 disorders (gene mutation and protein accumulation) and the effects of chemoradiotherapy (CRT).

Patients and Methods

Biopsy specimens obtained before CRT (40–60 Gy; low-dose 5-fluorouracil plus cisplatin) from 64 patients with locally advanced (T2–T4) ESCC were examined for p53 gene mutations (MT) of exons 4–9 by polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) and protein accumulation by immunohistochemistry (IHC). These were correlated with the pathological effects of CRT and cause-specific survival.

Results

Pathological complete response (pCR) was observed in 21.9% (14/64) patients, who showed better survival than non-pCR patients (2-year survival 78.6% versus 40.5%, P = 0.007). p53 mutation (MT)+ and p53 IHC+ were observed in 31.3% (20/64) and 65.6% (42/64) patients, respectively, and each was significantly associated with non-pCR (P = 0.004 and 0.042, respectively). Combined evaluation of p53 MT and p53 IHC correlated well with pCR frequency, showing 0% (0/12) for MT+/IHC+, 0% (0/8) for MT+/IHC–, 20% (6/30) for MT–/IHC+ and 57.1% (8/14) for MT–/IHC–. These results indicate that presence of p53 mutations was associated with non-pCR regardless of IHC status, and that p53 immunoreactivity was helpful in predicting non-pCR among p53 mutation-negative patients.

Conclusion

Analysis of ESCC biopsy specimens for p53 gene mutation can identify patients who will not achieve pCR by CRT. The results should be confirmed by large cohort prospective studies.

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Title: p53 Mutation Status Predicts Pathological Response to Chemoradiotherapy in Locally Advanced Esophageal Cancer
Authors: Tomoki Makino, MD
Makoto Yamasaki, MD
Hiroshi Miyata, MD
Setsuko Yoshioka, MD
Shuji Takiguchi, MD
Yoshiyuki Fujiwara, MD
Kiyokazu Nakajima, MD
Toshirou Nishida, MD
Masaki Mori, MD
Yuichiro Doki, MD
Publication date: 01-03-2010
Publisher: Springer-Verlag
Published in: Annals of Surgical Oncology / Issue 3/2010
Print ISSN: 1068-9265
Electronic ISSN: 1534-4681
DOI: https://doi.org/10.1245/s10434-009-0786-9

Keynote webinar | Spotlight on medication adherence

Springer Medicine

p53 Mutation Status Predicts Pathological Response to Chemoradiotherapy in Locally Advanced Esophageal Cancer

Abstract

Background and Objectives

Patients and Methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Background and Objectives

Patients and Methods

Results

Conclusion

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