Telomere Length Measurement in Human Tissue Sections by Quantitative Fluorescence In Situ Hybridization (Q-FISH).

Keisuke Nonaka, Junko Aida, Yasuko Hasegawa, Tomio Arai, Toshiyuki Ishiwata, Kaiyo Takubo

Research Team for Geriatric Pathology, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo, Japan. [email protected]. · pubmed

Paper

Abstract

Telomeres in most somatic cells shorten with each cell division, and critically short telomeres lead to cellular dysfunction, cell cycle arrest, and senescence. Thus, telomere shortening is an important hallmark of human cellular senescence. Quantitative fluorescence in situ hybridization (Q-FISH) using formalin-fixed paraffin-embedded (FFPE) tissue sections allows the estimation of telomere lengths in individual cells in histological sections. In our Q-FISH method, fluorescently labelled peptide nucleic acid (PNA) probes are hybridized to telomeric and centromeric sequences in FFPE human tissue sections, and relative telomere lengths (telomere signal intensities relative to centromere signal intensities) are measured. This chapter describes our Q-FISH protocols for assessing relative telomere lengths in FFPE human tissue sections.

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Research summary

The paper discusses a method for measuring telomere lengths in human tissue, which is relevant to understanding cellular senescence—a key aspect of aging. However, the focus is primarily on a technical protocol rather than addressing the underlying mechanisms of aging or proposing solutions to extend lifespan or mitigate age-related decline. Thus, while it contributes to the field of aging research, its impact is limited and more incremental than groundbreaking.

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