Journal Article Telomere Visualization in Tissue Sections using Pyrrole–Imidazole Polyamide Probes

Sasaki, Asuka  ,  Ide, Satoru  ,  Kawamoto, Yusuke  ,  Bando, Toshikazu  ,  Murata, Yukinori  ,  Shimura, Mari  ,  Yamada, Kazuhiko  ,  Hirata, Akiyoshi  ,  Nokihara, Kiyoshi  ,  Hirata, Tatsumi  ,  Sugiyama, Hiroshi  ,  Maeshima, Kazuhiro

62016-07-06 , Springer Nature
さまざまな組織切片の染色体テロメアの長さを3時間で検出できる方法を開発. 京都大学プレスリリース. 2016-07-06.
Pyrrole–Imidazole (PI) polyamides bind to specific DNA sequences in the minor groove with high affinity. Specific DNA labeling by PI polyamides does not require DNA denaturation with harsh treatments of heat and formamide and has the advantages of rapid and less disruptive processing. Previously, we developed tandem hairpin PI polyamide probes (TH59 series), which label telomeres in cultured cell lines more efficiently than conventional methods, such as fluorescence in situ hybridization (FISH). Here, we demonstrate that a TH59 derivative, HPTH59-b, along with immunostaining for specifying cell types in the tissues, visualizes telomeres in mouse and human tissue sections. Quantitative measurements of telomere length with single-cell resolution suggested shorter telomeres in the proliferating cell fractions of tumor than in non-tumor tissues. Thus, PI polyamides are a promising alternative for telomere labeling in clinical research, as well as in cell biology.

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