TP53 variants in p53 signatures and the clonality of STICs in RRSO samples

Tomoko Akahane, Kenta Masuda, Akira Hirasawa, Yusuke Kobayashi, Arisa Ueki, Miho Kawaida, Kumiko Misu, Kohei Nakamura, Shimpei Nagai, Tatsuyuki Chiyoda, Wataru Yamagami, Shigenori Hayashi, Fumio Kataoka, Kouji Banno, Kokichi Sugano, Hajime Okita, Kenjiro Kosaki, Hiroshi Nishihara, Daisuke Aoki

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Objective: Precursor lesions may be identified in fallopian tube tissue after risk-reducing salpingo-oophorectomy (RRSO) in patients with pathogenic variants of BRCA1/2. Serous tubal intraepithelial carcinoma (STIC) is considered a precursor of high-grade serous carcinoma, whereas the significance of the p53 signature remains unclear. In this study, we investigated the relationship between the p53 signature and the risk of ovarian cancer. Methods: We analyzed the clinicopathological findings and conducted DNA sequencing for TP53 variants of p53 signatures and STIC lesions isolated using laser capture microdissection in 13 patients with pathogenic variants of BRCA1/2 who underwent RRSO and 17 control patients with the benign gynecologic disease. Results: TP53 pathogenic variants were detected significantly higher in RRSO group than control (p<0.001). No difference in the frequency of p53 signatures were observed between groups (53.8% vs 29.4%; p=0.17). TP53 sequencing and next-generation sequencing analysis in a patient with STIC and occult cancer revealed 2 TP53 mutations causing different p53 staining for STICs and another TP53 mutation shared between STIC and occult cancer. Conclusion: The sequence analysis for TP53 revealed 2 types of p53 signatures, one with a risk of progression to STIC and ovarian cancer with pathological variants in TP53 and the other with a low risk of progression without pathological variants in TP53 as seen in control.

本文言語English
論文番号e50
ジャーナルJournal of gynecologic oncology
33
4
DOI
出版ステータスPublished - 2022 7月
外部発表はい

ASJC Scopus subject areas

  • 腫瘍学
  • 産婦人科学

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