2022 Fiscal Year Final Research Report
Stratification of breast cancer based on single-cell analysis
Project/Area Number |
20K07708
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 50020:Tumor diagnostics and therapeutics-related
|
Research Institution | Japanese Foundation for Cancer Research |
Principal Investigator |
MARUYAMA Reo 公益財団法人がん研究会, がん研究所 がんエピゲノムプロジェクト, プロジェクトリーダー (60607985)
|
Co-Investigator(Kenkyū-buntansha) |
高橋 洋子 公益財団法人がん研究会, 有明病院 乳腺外科, 副医長 (70383809)
中太 智義 公益財団法人がん研究会, がん研究所 がんエピゲノムプロジェクト, 研究員 (10364770)
|
Project Period (FY) |
2020-04-01 – 2023-03-31
|
Keywords | 乳がん / 腫瘍内不均一性 |
Outline of Final Research Achievements |
In this study, single-cell epigenomic analysis was performed on human breast cancer tissue to analyze the cell types constituting cancer and their epigenomic heterogeneity. Furthermore, we focused on the activity of the estrogen receptor motif and the intra-tumor heterogeneity of its target genes and discussed their relevance to endocrine resistance. Furthermore, an integrated analysis of data from autologous cases and the TCGA breast cancer cohort identified breast cancer subgroups with reduced accessibility of ER-binding regions but maintained ER expression. These results suggest that epigenetic heterogeneity of breast cancer cells may be associated with endocrine resistance and poor prognosis.
|
Free Research Field |
腫瘍生物学
|
Academic Significance and Societal Importance of the Research Achievements |
エストロゲン受容体(ER)陽性乳がんは、世界で新規に診断される全乳がんの70%を占める。ER陽性乳がんにはERシグナルを遮断する内分泌療法が著効するが、約20%の患者で治療後に再発する。本研究はER陽性乳がん患者にはエピゲノムレベルでの多様性が存在することを明らかにしたが、それが将来の治療抵抗性を予測しうるものであれば、早期診断や早期治療介入といった応用が可能となる。
|